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POLARIZER OR INTERFERENCE FILTER

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353 - Optics: image projectors

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DocumentTitleDate
20130083293IMAGE GENERATING DEVICE WITH IMPROVED ILLUMINATION EFFICIENCY - An image generating device includes a light source, a light filtering element, a light conversion element, and an image generating element. The light source is for generating visible light. The light filtering element is disposed on a light path of the visible light. The light filtering element includes a plurality of light filtering blocks, and each of the light filtering blocks is for allowing light with wavelength within a predetermined range to pass through. The light conversion element is disposed on the light path. The light conversion element includes a first quantum dot layer for converting light with wavelength below a first wavelength to light with the first wavelength. The image generating element is for generating images according to light passed through the light filtering element and the light conversion element.04-04-2013
20100020288PROJECTION DISPLAY APPARATUS - Disclosed is a projection display apparatus including an optical modulator, configured to modulate a luminance of a beam; light sources in quantities of N, configured to output each beam having different polarization direction, N being a natural number and equal to or greater than 2; a lens unit, configured to allow each of the beams to be incident on an identical position of the optical modulator at a different incidence angle; a projection lens, configured to condense each of the N beams modulated and outputted from the optical modulator; an N-slit diaphragm, configured to allow some of the N beams to pass through the N-slit diaphragm; and N polarization filters, configured to perform a filtering of the beams having passed through N-slit diaphragm in different polarization directions. With the present invention, it is possible to suppress speckle noises which are generated on a video projected on a screen.01-28-2010
20130044293PROJECTION SUBSYSTEM - Projection subsystems are described. More, particularly, projection subsystems that include a light source and a polarizing beam splitter are described. The polarizing beam splitters of the presently described projection subsystems are capable of avoiding performance degradation even after exposure to large doses of incident light.02-21-2013
20080259283ILLUMINATION APPARATUS AND PROJECTION DISPLAY APPARATUS - An illumination apparatus includes: a first dichroic mirror; a second dichroic mirror which separates the combined light into a red component light R and the green component light G; and a polarization adjuster provided on an optical path of the combined light between the dichroic mirrors. The polarization adjuster adjusts a polarization direction of a yellow component light Ye in the combined light. A second dichroic mirror separates the combined light into the red component light R on which a part of or all of the yellow component light Ye is superimposed and the green component light G on which the rest of the yellow component light Ye is superimposed.10-23-2008
20110194078Projector - A projector having a first lens array with a plurality of first lenses in a plane substantially orthogonal to an optical axis of the light beam from a light source that divides the light beam into a plurality of partial light beams, a second lens array having a plurality of second lenses corresponding to the plurality of first lenses, and a polarization converter that is disposed on a light beam emitting-side of the first lens array. A focal position in a first direction of the first lens is set in the vicinity of the second lens array in the optical direction of the light beam irradiated from the first lens. A focal position in the second direction of the first lens is set in the vicinity of the polarization converter in the optical direction of the light beam irradiated from the first lens.08-11-2011
20110194076Projector - Disclosed is a projector, the projector including a light source, an illumination unit illuminating light incident from the light source, and a display device enabling to realize an image by receiving the light irradiated from the illumination unit, and whose center is positioned at an axis different from an optical axis of the illumination unit.08-11-2011
20130077053OPTICAL APPARATUS AND PROJECTION APPARATUS - Provided is an optical apparatus including a polarization separation element for separating an incident light beam into a first polarization component and a second polarization component and outputting the first polarization component and the second polarization component, a polarization conversion unit including a waveplate for converting one of the first polarization component and the second polarization component into the other polarization component, the waveplate being held to a holding metal plate, and a housing for holding the polarization separation element and the polarization conversion unit.03-28-2013
20100118274PROJECTION DISPLAY HAVING DUAL MODE FUNCTION - A projection display having a dual mode function is provided. The projection display includes: a driving unit controlling an entire operation; a light source unit; a polarization beam splitter splitting light provided from the light source unit into first and second polarized light beams; a first light modulation device located in a path through which the first polarized light beam provided from the PBS (polarization beam splitter), the first light modulation device modulating the first polarized light beam in response to a first image signal and providing the first image; a first projection lens unit magnifying and projecting the first image provided from the first light modulation device; a second light modulation device located in a path through which the second polarized light beam provided from the PBS, the second light modulation device modulating the second polarized light beam in response to a second image signal and providing the second image; and a second projection lens unit magnifying and projecting the second image provided from the second light modulation device.05-13-2010
20100039621PROJECTOR - A projector includes: a light source; a polarization conversion element array having an entrance surface on which an effective entrance area and an ineffective entrance area are disposed to form stripes; a modulation device adapted to modulate a linearly polarized light beam emitted from the polarization conversion element array in accordance with an image signal; a projection device adapted to project the modulated light beam; a first light shielding section, a part of the entrance surface being provided with the first light shielding section adapted to shield a part of the incident light beam to the effective entrance area; and a first opening section, the first opening section being another area of the entrance surface than the part provided with the first light shielding section, at least a part of the first opening section reaches an end of the entrance surface.02-18-2010
20130038838OPTICALLY EFFICIENT POLARIZED PROJECTOR - A pixel array display system which has an illumination source with a plurality of emitters in a sparse array, collimators in front of the emitters, a condenser lens downstream of the collimators, an optical homogenizing element downstream from the condenser lens, a relay lens downstream from the optical homogenizing element, a pixel array downstream from the relay lens, a rear group of lens elements of a projection lens downstream from the pixel array, a polarization converter stack downstream from the rear group of lens elements and a front group of lens elements of the projection lens downstream from the polarization converter stack, so that light from the emitters is imaged onto input apertures of the polarization converter stack.02-14-2013
20130038839OPTICAL DEVICE, METHOD FOR PRODUCING OPTICAL DEVICE, AND PROJECTION-TYPE IMAGING APPARATUS - An optical device includes: a light transmissive first substrate; a light transmissive second substrate; a polarizing layer as a resin layer disposed therebetween; a first bonding film which is an adhesive and bonds the polarizing layer to the first substrate; and a second bonding film which is formed of a plasma-polymerized film and bonds the polarizing layer to the second substrate, wherein the outer shapes of the first substrate and the second substrate are larger than that of the polarizing layer, and a sealing part for sealing with a sealant is provided on a lateral surface of the polarizing layer such that the sealing part is interposed between the first substrate and the second substrate.02-14-2013
20130033678OPTICAL ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTION DISPLAY DEVICE - Disclosed is an optical element that includes: carrier generation layer (02-07-2013
20100110386Polarization Conversion and Color-Combination Techniques for Pico Projector Illuminators - Disclosed are illumination systems especially suitable for very small data projectors, called pico projectors. The disclosed illumination systems provide high optical efficiency for projectors that need polarized light but utilize unpolarized light sources such as light-emitting diodes. Some of the disclosed illumination systems make use of light sources of different colors, and provide polarization conversion in ways based on color-selective elements of a variety of different types to convert substantially all the light emitted by the light sources to a single polarization, without increasing the effective optical extent of the source. Other disclosed illumination system provide compact ways to combine light from differently colored light sources without the use of bulky x-cube or angled dichroic elements.05-06-2010
20120262674OPTICAL DEVICE, PROJECTION-TYPE IMAGING APPARATUS, AND METHOD FOR PRODUCING OPTICAL DEVICE - An optical device includes: a light transmissive first substrate; a light transmissive second substrate; a polarizing layer disposed between the first substrate and the second substrate; a first bonding layer which bonds the first substrate to the polarizing layer; and a second bonding layer which bonds the second substrate to the polarizing layer, wherein the first bonding layer is an adhesive layer, and the second bonding layer contains a structure of siloxane (Si—O) and a leaving group. By forming the first bonding layer of an adhesive layer, a necessary strength can be ensured, and also the optical properties can be enhanced by absorbing the irregularities of the polarizing layer formed of a synthetic resin so as to prevent the contamination with air bubbles. Since the time of exposure of the polarizing layer to heat generated by a plasma can be decreased, the polarizing layer is not deteriorated.10-18-2012
20130135591OPTICAL FIBER AND PROJECTOR DEVICE - An optical fiber and a projector device are provided. The optical fiber has a main body with a light-emitting curved surface. A curvature radius of the center of the light emitting curved surface facing the main body substantially ranges between 0.05˜1 mm, so that the light emitted from the light-emitting curved surface via the main body is collimated.05-30-2013
20120182525LIGHT SOURCE DEVICE AND PROJECTION - TYPE DISPLAY DEVICE USING SAME - A light source device includes: a first light source (07-19-2012
20120182524ILLUMINATING DEVICE AND PROJECTION DISPLAY DEVICE USING THE SAME - Provided is an illumination device that includes: light source (07-19-2012
20090303443Image Projection Device - The invention relates to an image projection device having a light source (12-10-2009
20090040465POLARIZED, LED-BASED ILLUMINATION SOURCE - An illumination source includes a number of light emitting diodes (LEDs) operating at a first wavelength. Light from the LEDs illuminates a phosphor material that generates light at a second wavelength. A reflective polarizer transmits light at the second wavelength in a first polarization state and reflects light at the second wavelength in a second polarization state orthogonal to the first polarization state. The light at the second wavelength reflected by the reflective polarizer is directed back towards the phosphor material without an increase in angular range. In some embodiments the LEDs, having a conformal layer of phosphor material, are attached directly to the first surface of a liquid cooled plate. A liquid coolant contacts a second surface of the plate.02-12-2009
20090040464Compensation Element Adjustment Mechanism and Projector - A compensation element adjustment mechanism used with a light modulation device and a polarization plate includes: an optical compensation element disposed between the light modulation device and a polarization plate; a frame for supporting the optical compensation element, and having a pair of shaft members disposed at positions opposed to each other on a periphery of the optical compensation element; a support holder to be fixed with respect to the light modulation device, and for rotatably supporting the pair of shaft members; and a fixing section for restricting a displacement of the frame to the support holder by an elastic contact.02-12-2009
20090040463Illumination system of LED for projection display - An illumination device and a projection system using the same are provided. The illumination device comprises a first light source module, a second light source module and a dichroic element. The first light source module comprises a first carrying board and a plurality of first light-emitting units disposed thereon for providing a first light beam. The second light source module comprises a second carrying board and a plurality of second and third light-emitting units disposed thereon for providing a second light beam. The dichroic element has a first side, a second side and a light output side. The first and the second light source modules are respectively optically aligned with the first side and the second side of the dichroic element, wherein the dichroic element provides a third light beam to the light output side by chromatically combining the first light beam and the second light beam.02-12-2009
20100091246SINGLE PROJECTION DISPLAY DEVICE - Disclosed is a single projection display device in which illumination light that is emitted from a light source unit and is linearly-polarized is reflected at a right angle by a PBS and is then incident on a single reflective liquid crystal display device, and modulated light passes through the PBS and is then projected onto a screen by a projection lens. An intersection point between the optical axis of the projection lens and the reflective liquid crystal display device deviates from the center of the surface of the reflective liquid crystal display device. The normal line of a polarized light separation plane is parallel to a plane that is vertical to another plane formed by a surface normal at the center of the surface of the reflective liquid crystal display device and the optical axis of the projection lens and that includes the optical axis of the projection lens.04-15-2010
20130057832PROJECTOR - A projector includes an illumination device having a light source device emitting light, and a polarization conversion element adapted to emit light from the light source device as polarized light, a light modulation device adapted to modulate the light from the illumination device in accordance with image information, and a projection optical system adapted to project the light from the light modulation device, and the illumination device further includes a light diffusing unit disposed in at least one of upstream and downstream of the polarization conversion element.03-07-2013
20130057831POLARIZATION OPTICAL APPARATUS, OPTICAL APPARATUS AND PROJECTION APPARATUS - There is provided a polarization optical apparatus including a reflection-type polarization element for transmitting a predetermined polarization component light, inputting the light to a reflection-type optical modulation element, and reflecting polarization component light optically modulated by the reflection-type optical modulation element, a polarization element holding member including a sliding support surface for slidably supporting the reflection-type polarization element in a surface direction, and holding the reflection-type polarization element, and an urging portion for urging the reflection-type polarization element toward the sliding support surface while enabling the reflection-type polarization element to be slid along the sliding support surface.03-07-2013
20110063580PROJECTION DISPLAY APPARATUS - A projection display apparatus (03-17-2011
20090296046Projector - A projector having a first lens array with a plurality of first lenses in a plane substantially orthogonal to an optical axis of the light beam from a light source that divides the light beam into a plurality of partial light beams, a second lens array having a plurality of second lenses corresponding to the plurality of first lenses, and a polarization converter that is disposed on a light beam emitting-side of the first lens array. A focal position in a first direction of the first lens is set in the vicinity of the second lens array in the optical direction of the light beam irradiated from the first lens. A focal position in the second direction of the first lens is set in the vicinity of the polarization converter in the optical direction of the light beam irradiated from the first lens.12-03-2009
20110013146ILLUMINATION APPARATUS AND PROJECTOR - An illumination apparatus provided with a light source 01-20-2011
20110013145Lighting apparatus and projector - A lighting apparatus of the present invention includes light source (01-20-2011
20090268165OPTICAL ENGINE - An optical engine including a light source, a polarizing beam splitter (PBS), a multi-focus lens, and a light valve is provided. The light source is capable of emitting an illumination beam. The PBS is disposed on the light path of the illumination beam. The multi-focus lens is disposed on the light path of the illumination beam between the light source and the PBS, and has a plurality of refractive portions. The refractive portions have different effective focal lengths from one another. The PBS allows at least a part of the illumination beam with a first polarization direction to travel to the light valve. The light valve is capable of reflecting the part of the illumination beam and converting the part of the illumination beam into an image beam with a second polarization direction. The image beam from the light valve travels to the PBS.10-29-2009
20120224149OPTICAL ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTION-TYPE DISPLAY DEVICE - A hologram layer (09-06-2012
20120224147LIGHT EMITTING ELEMENT AND PROJECTION DISPLAY DEVICE PROVIDED WITH SAME - Provided is a light-emitting element having high luminance and high directivity and emitting light in a controlled polarization state. The light-emitting element comprises substrate 09-06-2012
20120224146ILLUMINATION DEVICE AND PROJECTION TYPE DISPLAY DEVICE USING THE SAME - Illumination device includes a light source (09-06-2012
20130063701FLY EYE INTEGRATOR POLARIZATION CONVERTER - The present disclosure relates generally to an optical element, a light projector that includes the optical element, and an image projector that includes the optical element. In particular, the optical element provides an improved uniformity of light by homogenizing the light with lenslet arrays, such as “fly-eye arrays” (FEA). A first FEA is positioned to intercept and converge an unpolarized combined light before the light is converted to a single polarization state, and a second FEA is positioned to intercept and diverge the converted light having a single polarization state.03-14-2013
20130063700PROJECTION-TYPE IMAGE DISPLAY APPARATUS - A projection-type image display apparatus includes a color separation element including a color separation surface, a light modulation element configured to receive the light divided by the color separation element, a polarizing beam splitter disposed between the color separation element and a projection optical system to separate a light path of a light modulated by the light modulation element according to a polarization direction and guide the resulting light to the projection optical system, and a phase difference plate disposed between the color separation element and the light modulation element. An optic axis of the phase difference plate and the normal of the color separation surface are substantially parallel or perpendicular to each other, in a cross section parallel to a normal of the color separation surface and a normal of the light modulation element.03-14-2013
20130188153THREE DIMENSIONAL IMAGE PROJECTOR - A method is provided for projecting a three-dimensional image. The system includes a first light source, the first light source emitting light in a first direction and a second light source emitting light in a second direction. A beam splitter device is disposed adjacent each light source and an imaging device is disposed adjacent the beam splitter device. Light from the first light source and the second light source travel a common optical path to a projector lens assembly.07-25-2013
20090237616Projection type image display device - A projection type image display device includes a LED light source, a polarizing plate, a crossdichroic mirror, three reflective spatial light modulation elements and a projection lens. The LED light source emits lights with three wavelengths. The polarizing plate transmits a first linear polarized light therethrough and reflects a second linear polarized light. The crossdichroic mirror separates the first linear polarized light into three separated lights according to the wavelengths and emits as three separated linear polarized lights, and combines lights entering and emits from an entering direction of the first linear polarized light. The crossdichroic mirror includes two color separation filters arranged so as to be inclined at about 45 degrees with respect to light entering. The two color separation filters meet a condition that a phase difference between a p-polarized light component and an s-polarized light component is equal to or less than 15 degrees in the wavelengths of the three separated linear polarized lights.09-24-2009
20130162954LCOS PROJECTION SYSTEM - A LCOS projection system includes an illumination device, a LCOS microdisplay element, a polarization beam splitter, an optical projection lens, and a beam recycling module. A first portion of the lighting beams provided by the illumination device are transmissible through the polarization beam splitter and directed to the LCOS microdisplay element. A second portion of the lighting beams provided by the illumination device and from the polarization beam splitter are introduced into the beam recycling module. By the beam recycling module, a polarization state of the second portion of the lighting beams is converted. Consequently, the second portion of the lighting beams in the converted polarization state can also be projected onto the LCOS microdisplay element. The beam recycling module includes a total internal reflection prism, which is arranged in a transmission path of the first portion and the second portion of the lighting beams.06-27-2013
20090009720OPTICAL ENGINE - An optical engine including a beam splitting and combining system, which includes a first polarizing beam splitting (PBS) unit, a dichroic unit and a second PBS unit, is provided. A first color beam is reflected by the first PBS unit, is reflected by a first light valve, and passes through the first PBS unit sequentially. A second color beam passes through the first PBS unit, is reflected by a second light valve, and is reflected by the first PBS unit sequentially. The dichroic unit is disposed on an optical path of the first and second color beams. The second PBS unit is capable of allowing a third color beam to travel to a third light valve and allowing the third color beam reflected from the third light valve to travel to the dichroic unit. The dichroic unit is capable of combining the first, second and third color beams.01-08-2009
20090009719COMPACT IMAGE PROJECTOR - A representative embodiment of the invention provides a compact image projector having a light source coupled to a spatial light modulator (SLM). The light source has a substantially planar structure. The overall size of the SLM is dominated by its length and/or width. The projector has an optical arrangement that enables the SLM to be oriented so that the SLM's dominant dimensions are parallel to the plane of the light source. Due to this relative orientation of the SLM and light source, one of the dimensions of the image projector can be smaller than 12 mm, which advantageously enables incorporation of the projector into a hand-held electronic device, such as a cell phone, PDA, or media player.01-08-2009
20120236263DEPOLARIZATION ELEMENT AND PROJECTION TYPE DISPLAY DEVICE - A depolarization element includes high depolarization for light beams having coherence and plural wavelengths and also provides a projection type display device capable of reducing speckle noise. Unit regions, each formed of m regions (m≧4) having different phase differences generated for incident light, are disposed, and two regions extracted from the m regions have at least one combination of regions being different in area. When plural light beams having different wavelengths are incident, the composition of the Stokes vectors of the light beams emitted from the respective m regions is made nearly zero by setting the areas of the respective m regions and the generated phase differences, whereby the light beams having coherence and plural wavelengths can be converted so as to have the polarization state of natural light.09-20-2012
20110043762Projector - A projector includes: a first solid-state light source device which includes a first solid-state light source emitting main excitation light, and a fluorescent layer converting main excitation light to light including a first color light component and a second color light component different from the first color light component, and emitting converted light; a second solid-state light source device which includes a second solid-state light source emitting a third color light component different from the first color light component and the second color light component; a light modulation device modulating the first color light component, the second color light component, and the third color light component in accordance with image information; a projection optical system projecting the modulated light components from the light modulation device as a projection image; and a third solid-state light source device which includes a third solid-state light source emitting auxiliary excitation light, wherein the fluorescent layer is configured such that auxiliary excitation light is input thereto in a direction different from a direction in which main excitation light is input, and the fluorescent layer is configured to convert auxiliary excitation light to light including the first color light component and the second color light component, and to emit converted light.02-24-2011
20120224148LIGHT EMITTING ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTION DISPLAY DEVICE - Light source layer (09-06-2012
20100328614ILLUMINATION APPARATUS AND PROJECTION DISPLAY APPARATUS - An illumination apparatus includes: a polarization conversion element configured to align polarization directions of light emitted from a light source in one polarization direction; a color separation unit configured to separate the light whose polarization directions are aligned in the one polarization direction by the polarization conversion element; and a polarization adjustment element configured to adjust a polarization state of light in a predetermined wavelength band within a wavelength range of the light emitted from the light source. The polarization adjustment element is provided between the polarization conversion element and the color separation unit on an optical path of the light emitted from the light source.12-30-2010
20100171928SINGLE-IMAGER PROJECTION ENGINE ASSEMBLY - A single-imager projection engine assembly includes a light source, a reflective polarization modulation imager, a reflective quarter wave composite plate, a projection lens system, and a PBS assembly which includes a first polarization beam splitting film and a second polarization beam splitting film in a V-notch pairing configuration. The first polarization beam splitting film reflects the illumination light in first polarization state to the reflective polarization modulation imager, while the second polarization beam splitting film and the reflective quarter wave composite plate in conjunction convert the illumination light in second polarization state passing through the first polarization beam splitting film to first polarization state and reflects the converted to the reflective polarization modulation imager. Combined illumination is modulated, polarization rotated and reflected by the reflective polarization modulation imager back to the PBS assembly for projection through the projection lens.07-08-2010
20100171927PROJECTION TYPE IMAGE DISPLAY DEVICE - Red, green, and blue laser light emitted from laser light sources 07-08-2010
20110279780PROJECTION DISPLAY DEVICE - A projection display device includes: first polarization conversion unit (11-17-2011
20120062847PHASE PLATE HAVING FINE PERIODIC STRUCTURE SMALLER THAN VISIBLE LIGHT WAVELENGTH AND PROJECTION IMAGE DISPLAY APPARATUS - A phase plate includes a transparent substrate and a periodic structure formed on a substrate surface of the transparent substrate. The phase plate is configured to provide light having a predetermined design wavelength that vertically enters the substrate surface with a phase difference from ¼ wavelength to ¾ wavelength. The periodic structure is configured to reduce a volume occupation rate with increasing distance from the transparent substrate, and the periodic structure has a height of at least 200 nm. An angle between a first direction in which a center of a width of a unit periodic structure at a position closest to the substrate surface is connected with a center of a width of a unit periodic structure at a position farthest from the substrate surface and a normal direction of the substrate surface is from 5 degrees to 30 degrees.03-15-2012
20100201953Substrate-Guided Display Having Polarization Selective Input Structure - A display system includes and image-guiding substrate with input and/or output structures configured to improve image quality.08-12-2010
20100201952PROJECTOR - A projector includes first and second optical systems each having a light modulation device that modulates light emitted from a light source device, in accordance with image information input, and forms an optical image. A combining optical system combines the optical images respectively formed by the first and second optical systems. A projection optical system projects the combined optical image. The first or the second optical system includes a transparent parallel plate between the light modulation device and the combining optical system in a rotatable manner, and a tilt angle adjustment mechanism that rotates the transparent parallel plate with respect to a first axis perpendicular to a normal line of an entrance surface of the light modulation device and a second axis perpendicular to the normal line and the first axis to adjust a tilt angle of the transparent parallel plate with respect to the normal line.08-12-2010
201102859663D OPTICAL PROJECTION DEVICE - An optical projection device comprises an imaging device adapted to generate a first and a second image in a first and a second light beam, respectively, a first converting device that is adapted to convert a polarization state of one of the first and the second light beams into a converted polarization state, so that the first and the second light beams are in different polarization states, and a relay lens that is adapted to generate an intermediate image, by superimposing the first and the second images. The relay lens comprises a combining device, that is adapted to combine the first and the second light beams. The optical projection device further comprises a projection lens that is adapted to project the intermediate image onto a screen.11-24-2011
20110285967SYSTEMS AND METHODS FOR REDUCING SPECKLE USING DIFFUSING SURFACES - A laser projection system includes a light source, an optical scanning component, a focusing component, a speckle reduction diffusing surface, and an optical collimating component. The light source may include at least one laser configured to emit an output beam. The focusing component focuses the output beam at a first focused point. The speckle reduction diffusing surface is selectively introduced into an optical path at the first focused point. The optical collimating component collimates the output beam onto the optical scanning component. At least a portion of a scanned laser image is generated on a projection surface by operating the laser for optical emission of encoded image data and controlling the optical scanning component to scan the output beam. The optical collimating component images the first focused point at a second focused point at the projection surface when the speckle reduction diffusing surface is in the optical path.11-24-2011
20080212034SPECKLE REDUCTION IN LASER-PROJECTOR IMAGES - A laser projector having a configurable spatial light modulator (SLM) adapted to display various spatial modulation patterns and redirect illumination from a laser to form an image on the viewing screen. The laser projector drives the SLM to change spatial modulation patterns at a rate that causes the corresponding sequence of projected images to fuse to mitigate appearance of speckle in the resulting fused image. The SLM can be designed to redirect the illumination using either diffraction or specular reflection of light from the displayed spatial modulation pattern. In one embodiment, the SLM is a MEMS device having an array of individually addressable mirrors supported over a substrate and adapted to move (e.g., translate and/or rotate) with respect to the substrate.09-04-2008
20130010264ILLUMINATION APPARATUS AND PROJECTION APPARATUS - An illumination apparatus emits light onto an optical modulation device for forming an image according to a modulation signal and illuminating an object. The illumination apparatus includes a light source; a fluorescent material that emits light of a color different from a color of light emitted by the light source; and a light guiding unit that switches between a state in which the light emitted from the light source is guided to the fluorescent material and a state in which the light emitted from the light source is not guided to the fluorescent material.01-10-2013
20110194077Illuminating optical system for projector - An illuminating optical system for a projector including a light source and a plurality of display panels, includes a first integrator that includes a plurality of lens cells that divide a luminous flux emitted by the light source into a plurality of partial luminous fluxes and that condense the respective partial luminous fluxes, a second integrator that includes a plurality of lens cells on which the respective partial luminous fluxes are incident, a polarization converting element that uniformizes polarizing directions of the luminous fluxes having passed through the respective lens cells of the second integrator, and a color separating unit that separates each of the luminous fluxes from the polarization converting element into a plurality of color lights of different wavelengths. A field lens and a condenser lens are arranged between the polarization converting element and the color separating unit. The field lens superimposes, on the plurality of display panels, the luminous fluxes having passed through the respective lens cells of the first integrator.08-11-2011
20090002633PROJECTOR - A projector including a lighting device for emitting light including first, second and third colored light beams. A first dichroic mirror separates the light into the first colored light beam by reflecting the light in a certain wavelength range and transmitting the light in another wavelength range and transmitting the light in another wavelength range. A second dichroic mirror separates the other colored light beams into the second and third colored light beams by reflecting the light in a certain wavelength range and transmitting the light in another wavelength range. The second dichroic mirror separates the light from the lighting device into the colored light beams. The projector including a first color combining optical system for combining the colored light beams to emit a first image light beam.01-01-2009
20100033681ILLUMINATION APPARATUS AND PROJECTION DISPLAY APPARATUS - An illumination apparatus includes multiple liquid crystal panels, a polarization-state adjusting element, and a cross dichroic prism. A green component light includes a central-wavelength component light, a short-wavelength component light, and a long-wavelength component light. The polarization-state adjusting element separately adjusts a polarization state of the central-wavelength component light and each of polarization states of the long-wavelength component light and the short-wavelength component light.02-11-2010
20100002194PROJECTING DEVICE - A projecting device includes a light source, a filtering component, a reflecting mirror, a digital micro-mirror device, a projecting lens, and a panel. The filtering component changes lights emitted from the light source into substantially parallel polarized ultraviolet lights. The reflecting mirror reflects the substantially parallel polarized ultraviolet lights to the digital micro-mirror device. The digital micro-mirror device includes microscopic mirrors arranged in a rectangular array configured to be adjustable to reflect the substantially parallel polarized ultraviolet lights reflected by the reflecting mirror to the projecting lens. The projecting lens diverges the substantially parallel polarized ultraviolet lights. The panel includes a transparent substrate, a first fluorescence material layer, a second fluorescence material layer, and a third fluorescence material layer. The first, second, and third fluorescence material layers are positioned on the transparent substrate and emit red, blue and green lights when excited.01-07-2010
20090128780Polarization conversion system and method for stereoscopic projection - A polarization conversion system separates light from an unpolarized image source into a first state of polarization (SOP) and an orthogonal second SOP, and directs the polarized light on first and second light paths. The SOP of light on only one of the light paths is transformed to an orthogonal state such that both light paths have the same SOP. A polarization modulator temporally modulates the light on the first and second light paths to first and second output states of polarization. First and second projection lenses direct light on the first and second light paths toward a projection screen to form substantially overlapping polarization encoded images. The polarization modulator may be located before or after the projection lenses. The polarization-encoded images may be viewed using eyewear with appropriate polarization filters.05-21-2009
20090128781LED multiplexer and recycler and micro-projector incorporating the Same - A micro-projector comprises an LED layer, a light pipe coupled to the LED, a LCOS panel, a projection lens, a PBS, an aperture layer coupled to the output end of the light pipe which has a transmissive opening for transmitting a portion of the light output and a reflective surface for reflecting the remaining portion of the light output toward the input end of the light pipe. Thus, the remaining portion of the light output is recycled back to the LED to increase the brightness of the light output of the LED. The micro-projector also comprises a reflective polarizer disposed between the light pipe and the aperture layer for transmitting the light output of a predetermined polarization and reflecting other polarization of the light output, thereby recycling unused polarization of the light output back to the LED to increase the brightness of the light output of the LED.05-21-2009
20100007853Projector apparatus and image synthesizing device for the same - An image synthesizing device for a projector apparatus includes first, second, third polarizing beam splitters respectively provided for red light, green light, and blue light; and a light combining unit configured to combine and output the red light, the green light, and the blue light passing through the first, second, and third polarizing beam splitters. The first, second, and third polarizing beam splitters respectively include first, second, and third polarizing films. The first and second polarizing films where the red light and the green light enter are each formed of an organic material, and the third polarizing film where the blue light enters is formed of an inorganic material.01-14-2010
20100225886POLARIZATION ELEMENT AND PROJECTION DISPLAY DEVICE - A polarization element includes: a substrate; a plurality of convex line sections disposed on one surface of the substrate so as to form substantial stripes in a plan view; and a multilayer thin line provided to each of the convex line sections and extending along an extending direction of the convex line sections, wherein the multilayer thin line has a lower layer thin line disposed on the convex line section, and an upper layer thin line stacked on the lower layer thin line, the lower layer thin line and the upper layer thin line each have a first thin line disposed on one side surface out of both side surfaces in a direction along a shorter dimension of the convex line section, and a second thin line disposed on the other side surface, materials of the first thin line belonging to the lower layer thin line and the first thin line belonging to the upper layer thin line are different from each other, and materials of the second thin line belonging to the lower layer thin line and the second thin line belonging to the upper layer thin line are different from each other.09-09-2010
20120140184DUAL TOTAL INTERNAL REFLECTION POLARIZING BEAMSPLITTER - A dual TIR prism has an input prism, a wedge prism, an output prism, and a reflective polarizer. The dual TIR prism is configured to receive an optical beam at an entrance surface, to pass the first polarization direction of the received optical beam from a second exit surface, and to output the second polarization direction of the received optical beam from a first exit surface of the input prism.06-07-2012
20080284984Projection Device with a Folded Optical Path and Wire-Grid Polarizer - A folded projection display system includes a wire-grid polarizer placed immediately behind the system's imaging screen. The display system includes an image projector that projects an image beam containing light of a predetermined linear polarization toward the imaging screen. The wire-grid polarizer reflects the light in the image beam away from the screen. The reflected image beam then encounters a ¼-wavelength achromatic retarder that converts the linear polarization to circular polarization. The image beam next hits a mirror that reflects the light back through the ¼-wavelength achromatic retarder, which converts the circular polarization back to linear polarization, with the polarization director rotated 90 degrees from the original polarization direction. The wire-grid polarizer then allows the light to pass through to the image screen.11-20-2008
20090141244MEMS based projector having a prism - A MEMS-based projector may be included in various user devices. A selective fold mirror, a MEMS-based projector, and a polarization rotator may be oriented to reflect a beam within the device for external projection. Alternatively, a total internal reflection prism may take the place of a selective fold mirror or a polarization rotator and may reduce the number of necessary components in the user device. Various optical components may be placed in the MEMS-based projector and arranged in different positions to reflect a light beam in a desired direction for external projection. The components that make up the MEMS-based projector may depend on the available footprint in the device and the direction in which the light beam is to be projected. Some optical components may provide multiple functionalities which would otherwise require multiple components and may reduce the size of the projector.06-04-2009
20080266526COLOR COMBINING OPTICAL SYSTEM AND IMAGE PROJECTION APPARATUS USING THE SAME - A color combining optical system includes a first polarization splitting surface for light in a first wavelength range, and a second polarization splitting surface for light in a second and third wavelength range. The first polarization splitting surface guides illumination light in the first wavelength range to a first liquid crystal display (LCD) element and guides image light reflected from the first LCD element to a direction different from the illumination light. The second polarization splitting surface separates illumination light in the second and third wavelength range from each other, guides them to a second and third LCD element, respectively, and combines image light reflected from the second LCD element with image light reflected from the LCD element to guide combined light to the first polarization splitting surface which combines the image light reflected from the first LCD element with the combined light.10-30-2008
20090310086Light projector and projection method with enhanced contrast - A light projector contains a plurality of optical assemblies (12-17-2009
20090207381PROJECTION DISPLAY - A projection type image display apparatus is provided which includes a housing to hold an optical system including multi-lenses, a polarized-light conversion element and the color separation portion The housing operates to provide an optical path between a light source, located outside the housing, and penetration-type image display elements and an optical synthesizing portion also located outside of the housing.08-20-2009
20090207380PROJECTOR - A projector includes a light source unit that emits coherent light, a spatial light modulation unit that modulates the coherent light emitted from the light source unit in accordance with an image signal, and a polarized light modulation unit having a plurality of modulating areas, each of which changing the polarization state of light. The plurality of modulating areas temporally and spatially change the polarization state of the light outputted from the spatial light modulation unit.08-20-2009
20120287406OPTICAL PROJECTION SUBSYSTEM - A projection subsystem includes a light engine that provides a collection lens, a collimator and at least one solid state light emitter. A projection lens assembly receives the image and provides a projection beam having a luminous flux level. The projection subsystem has a portability efficacy.11-15-2012
20090161072ILLUMINATOR, IMAGE DISPLAY APPARATUS, AND POLARIZATION CONVERSION/DIFFUSION MEMBER - An illuminator that illuminates a projected surface includes a laser light source that emits laser light; a polarization converter disposed downstream of the laser light source, the polarization converter having a first area that converts the polarization direction of incident laser light into a first polarization direction and outputs the resultant laser light and a second area that converts the polarization direction of incident laser light into a second polarization direction and outputs the resultant laser light; and a light diffusion section disposed downstream of the laser light source, the light diffusion section diffusing incident laser light.06-25-2009
20110267586FOUR-PIECE PROJECTION LENS SYSTEM AND THE PROJECTION APPARATUS USING THE SAME - A projection apparatus includes a light source emitting an illuminating beam, a light valve receiving the illuminating beam to create an image beam, and a projection lens system arranged on a path of the image beam for receiving and projecting the image beam onto a screen. The projection lens system includes four lens elements arranged along the optical axis in order from the screen toward the light valve, namely, first, second, third and fourth lens elements respectively having positive, negative, positive and positive refractive power. The four-piece projection lens system satisfies the condition of 0.7911-03-2011
20120268719POLARIZING BEAM SPLITTER, POLARIZATION CONVERSION ELEMENT USING THE SAME, AND IMAGE PROJECTION APPARATUS - A polarizing beam splitter includes a medium and at least two thin-film layers having different refractive indices arranged in order from a light incidence side, and the medium and the thin-film layers satisfy a predetermined mathematical conditions.10-25-2012
20090046253POLARIZING BEAM SPLITTER, PROJECTION OPTICAL SYSEM, PROJECTION DISPLAY - A polarizing beam splitter includes: first and second prisms each having first and second end surfaces serving as an input surface or an output surface of light and an opposed surface as side surfaces of a pillar-like member; and at least two parallel flat layers disposed in parallel between the opposed surfaces of the first and second prisms. Here, one of the least two parallel flat layers is a first parallel flat layer polarization-separating the input beam. When it is assumed that the refractive index of a base material of the first and second prisms is Np, the resultant refractive index of the parallel flat layers other than the other parallel flat layer of the at least two parallel flat layers is Na, and the refractive index of the other parallel flat layer of the at least two parallel flat layers is Nb, (Na−Np)×(Nb−Np)<0 is satisfied.02-19-2009
20080278690Polarization Conversion Element,Polarization Conversion Optical System And Image Projecting Apparatus - A polarization conversion element having plural polarization separation sections and plural phase modulation sections is disclosed. A light flux is separated into transmission light (P polarization) and reflection light (S polarization) by being input to a polarization separation section. The reflection light reflected at the polarization separation section is output in the same direction as that of the transmission light by being reflected again at an adjacent polarization separation section at a different position from a position where a light flux is input to the adjacent polarization separation section. The phase modulation section is disposed on an optical path of the transmission light or the reflection light and output light becomes the same polarization.11-13-2008
20090190098Scanned Beam Display Engine with Polarizing Beam Splitter - A scanned beam projection system includes a polarizing beam splitter, a polarization rotating component and a scanning mirror. Light is directed on a first light path to the polarizing beam splitter at a substantially constant angle of incidence. The P-polarized light passes through. The P-polarized light passes through the polarization rotating component, is reflected off the scanning mirror back through the polarization rotating component, and arrives at the polarizing beam splitter as S-polarized light with a non-constant angle of incidence. The S-polarized light is reflected by the polarizing beam splitter, and a scanned image results.07-30-2009
20090273759PROJECTION IMAGE DISPLAY APPARATUS - A projection image display apparatus includes: an image light generator; a projection optics including a reflection mirror; and a polarization adjusting device adjusting image light to light polarized in a direction substantially orthogonal to a vertical plane along with a traveling direction of the image light reflected by the reflection mirror.11-05-2009
20090073389DEVICE AND METHOD FOR LARGE-SCREEN PROJECTION OF DIGITAL IMAGES ONTO A PROJECTION SCREEN - A device for the large-screen projection of digital images onto a projection screen having a light source and a reflector for producing a cone of light and for projecting the light emitted by the light source through an image generator and an object lens onto the projection screen and having a 3D-sectored polarization wheel which can be driven by a motor and which comprises polarizing sectors in the optical path of the light emitted by the light source, wherein the motor of the polarization wheel is configured such that it can drive the wheel in increments, and an electronic control unit is provided which synchronizes the motor of the polarization wheel and synchronizes with the image sequencing of the image generator such that each individual image is projected through the polarizing sector associated with its polarization.03-19-2009
20090296045ILLUMINATION SYSTEM - An illumination system includes at least one light source capable of generating light of at least three wavelength sections; at least three integrator modules for receiving the light of each wavelength section and performing a uniformization process on the light of each wavelength section; at least three first lens modules for receiving the after the uniformization process light and converging angles of the light into a predetermined range; a light coupling module for receiving the converged light and performing a light-coupling process on the light; and a polarization conversion module for receiving the coupled light and performing a polarization conversion process on the light.12-03-2009
20090103052NON-RIGIDLY COUPLED, OVERLAPPING, NON-FEEDBACK, OPTICAL SYSTEMS FOR SPATIAL FILTERING OF FOURIER TRANSFORM OPTICAL PATTERNS AND IMAGE SHAPE CONTENT CHARACTERIZATION - Non-rigidly coupled, overlapping, non-feedback optical systems for spatial filtering of Fourier transform optical patterns and image shape characterization comprises a first optical subsystem that includes a lens for focusing a polarized, coherent beam to a focal point, an image input device that spatially modulates phase positioned between the lens and the focal point, and a spatial filter at the Fourier transform pattern, and a second optical subsystem overlapping the first optical subsystem includes a projection lens and a detector. The second optical subsystem is optically coupled to the first optical subsystem.04-23-2009
20090296047IMAGE DISPLAY APPARATUS - An image display apparatus includes an illumination optical system that includes first and second beam splitting units, a first polarization conversion element, third and fourth beam splitting units, a second polarization conversion element, a first beam combining unit configured to combine a plurality of first polarized light beams with a plurality of second polarized light beams, a third polarization conversion element configured to convert a plurality of combined light beams into a plurality of polarized light beams, and a condensing unit configured to superimpose the plurality of polarized light beams onto the image display element, wherein each of the first and third beam splitting units includes a cylinder lens array.12-03-2009
20090168026FRONT PROJECTION SCREEN, A METHOD OF CONSTRUCTING THE SAME AND A FRONT PROJECTION SYSTEM INCLUDING THE SAME - An apparatus, a method of fabricating a front projection screen and a front projection system is provided. In one embodiment, the apparatus includes a front projection screen including an image surface and a selective transmission layer fixed to and covering the surface. The surface is configured to diffusely reflect light incident thereon and the selective transmission layer is configured to allow projected light from a laser source to illuminate the surface and block ambient light incident thereon. The laser projected light has a wavelength within a designated bandwidth.07-02-2009
20100060858VIDEO PROJECTOR - A video projector includes a first discharge port from which a cooling current is sent out of a duct to an optical component. A cooling fan generates the cooling current which flows through the duct. The first discharge port includes first and second wall surfaces opposed to each other in an optical axis direction in which the light is transmitted through the optical component, third and fourth wall surfaces opposed to each other in a lateral direction perpendicular to the optical axis direction, a discharge port inlet into which the cooling current from the cooling fan is drawn, and a discharge port outlet from which the cooling current is sent toward the optical component. A gap between the first and second wall surfaces and a gap between the third and fourth wall surfaces become narrower from the discharge port inlet to the discharge port outlet.03-11-2010
20090002634ILLUMINATION OPTICAL SYSTEM AND PROJECTION-TYPE IMAGE DISPLAY APPARATUS USING THE SAME - An illumination optical system configured to guide a light flux from a light source unit onto an illuminated surface includes a compression system configured to compress the light flux at a different compression ratio in a first cross section and a second cross section which are orthogonal to each other, and a polarized light splitting unit including a polarization split surface. The second cross section includes a line normal to the polarization split surface. Where a compression ratio for compressing a light flux in the first cross section is α, a compression ratio in the second cross section is β, and an F number smaller of F numbers calculated according to a maximum angle of a light flux incident on an illuminated surface in the first and the second cross sections is Fno, the following conditions are satisfied:01-01-2009
20110141438ILLUMINATION OPTICAL SYSTEM AND PROJECTOR - First and second light sources emit first and second light beams, respectively. A light condensing system condenses the beams, and a polarization separation system separates each of the beams into first and second polarization components. A ½ phase plate converts the polarization state of the first polarization component to one equal to that of the second polarization component, and a rod integrator uniformizes spatial energy distribution of the beams condensed by the light condensing system. A relay system forms an image of an exit face of the rod integrator on a region to be illuminated. The light condensing system condenses the first and second polarization components onto first and second regions, respectively, of an entrance face of the rod integrator; and the ½ phase plate is placed at the first region of the entrance face of the rod integrator or at a position conjugate with the first region.06-16-2011
20090168025 DECOHERED LASER LIGHT PRODUCTION SYSTEM - A decohered laser light production system is provided. The decohered laser light system comprises a laser source. The system further comprises a multi-mode fiber having an input face, an output face and a body for propagating light from the input face to the output face, the input face arranged to accept laser light from the laser source, the body comprising a length such that laser light is generally decohered when exiting the output face.07-02-2009
20080291399Polarization Converting Element and Projector Provided with Same - A polarization converting element includes: a main body that is made from a transparent member; an incident section that is provided to the main body, and upon which light generated from a light source is incident; an annular reflecting section that is formed on the periphery of the incident section; and a polarization splitting section that is formed opposite to the annular reflecting section on the emission side of light incident upon the incident section. One polarized light component of the incident light passes through the main body and is emitted from the polarization splitting section. Another polarized light component of the incident light is reflected towards the annular reflecting section by the polarization splitting section, and is emitted from the polarization splitting section after having again been reflected by the annular reflecting section and having been converted into light of a same polarization component as the light of the one polarized light component.11-27-2008
20080304016PROJECTOR, PROJECTION SYSTEM, AND METHOD FOR GENERATING PIXEL VALUE IN PROJECTOR - A projector includes an illuminator; a first image formation unit including a first optical unit having a light modulation element that modulates the light from the illuminator, the first image formation unit using the first optical unit to output first image light; a second image formation unit including a second optical unit having a light modulation element that modulates the light from the illuminator, the second image formation unit using the second optical unit to output second image light; a polarization combining system that combines the first image light outputted from the first image formation unit and the second image light outputted from the second image formation unit; a projection system that projects the image light combined by the polarization combining system; projection position adjusters that optically adjust the projection positions of the light modulation elements on a projection surface; and a pixel value generator that generates the pixel value for each pixel contained in the light modulation elements, the projection positions of which have been adjusted by the projection position adjusters, based on the projection position of the light from the pixel.12-11-2008
20100265467Laser Projection Source with Polarization Diversity Element for Speckle Reduction - An imaging system (10-21-2010
20100265466Laser Projection Source with Birefringent Wedge for Speckle Reduction - An imaging system (10-21-2010
20090128782MEMS Based Projector - A MEMS-based projector may be included in various user devices. A selective fold mirror, a MEMS-based projector, and a polarization rotator may be oriented to reflect a beam within the device for external projection. Alternatively, a total internal reflection prism may take the place of a selective fold mirror or a polarization rotator and may reduce the number of necessary components in the user device. Various optical components may be placed in the MEMS-based projector and arranged in different positions to reflect a light beam in a desired direction for external projection. The components that make up the MEMS-based projector may depend on the available footprint in the device and the direction in which the light beam is to be projected. Some optical components may provide multiple functionalities which would otherwise require multiple components and may reduce the size of the projector.05-21-2009
20130120713PROJECTION APPARATUS - There is provided a projection apparatus including a color synthesis section, a projection lens, and a polarization conversion section. The color synthesis section is configured to combine three-primary color light. The projection lens is configured to emit light provided by the color synthesis section. The polarization conversion section is disposed on a light-emission side of the projection lens and is configured to put the color light provided by the projection lens in a non-polarized state.05-16-2013
20090268166PROJECTION SYSTEM - A projection system including an illumination unit, a polarization conversion unit, a light valve, a projection lens, and a polarizing beam split (PBS) element is provided. The polarization conversion unit includes a V-shaped PBS element, a wave plate, and two reflective surfaces. The V-shaped PBS element includes a first PBS portion and a second PBS portion. The first PBS portion is adapted to be passed through by a first partial beam with a first polarization direction and reflect a second partial beam with a second polarization direction. The second PBS portion is adapted to be passed through by a third partial beam with the first polarization direction and reflect a fourth partial beam with the second polarization direction. The wave plate is disposed in the transmission paths of the first partial beam and the third partial beam. The reflective surfaces are located at opposite sides of the V-shaped PBS element.10-29-2009
20120069304DISPLAY DEVICE - A display device includes: a light source section; an optical modulator modulating light from the light source section based on a picture signal, to emit modulated light as picture light; a direct-view display section performing direct-view display based on the picture light; a projection optical system performing projection display on a projection screen based on the picture light; an optical member allowing the picture light from the optical modulator to travel toward at least one of the direct-view display section and the projection optical system; and a switching section performing control of traveling direction of the picture light on the optical member, to switch between two or more display modes which are selected, to include a two-way display mode, from a group consisting of a direct-view display mode, a projection display mode, and the two-way display mode.03-22-2012
20090141242STEREO PROJECTION APPARATUS USING POLARIZED SOLID STATE LIGHT SOURCES - A digital image projector includes a first polarized light source; a second polarized light source that is orthogonal in polarization state to the first polarized light source; a polarization beamsplitter disposed to direct light of either the first or second polarization along a common illumination axis; a MEMS spatial light modulator; and projection optics for delivering imaging light from the MEMS spatial light modulator.06-04-2009
20080316430PROJECTION APPARATUS - A projection apparatus including an illumination system, a reflective light valve and an imaging system is provided. The illumination system emits an illumination beam. The reflective light valve is disposed on a transmission path of the illumination beam. The imaging system includes a first lens group, a polarization beam splitter and a second lens group. The first lens group is disposed on the transmission path of the illumination beam between the illumination system and the reflective light valve. The polarization beam splitter is disposed on the transmission path of the illumination beam between the illumination system and the first lens group. The polarization beam splitter permits the illumination beam to pass through and travel to the reflective light valve. The reflective light valve modulates the illumination beam to an image beam traveling to the polarization beam splitter. The polarization beam splitter reflects the image beam to the second lens group.12-25-2008
20090015795METHOD OF MANUFACTURING OPTICAL COMPENSATION ELEMENT AND PROJECTOR - A projector with a specially manufactured optical compensation element is disclosed. One method of manufacturing the optical compensation element temporarily attaches an inorganic substrate made of a birefringent inorganic material to a base member with a temporary bond, grinds/polishes the inorganic substrate, attaches a light transmissive support substrate to a surface of the inorganic substrate on the opposite side to the side of the base member, and separates the inorganic substrate with the light transmissive support substrate from the base member.01-15-2009
20090015794Polarization Conversion Unit, Polarization Conversion Device, and Projector - A polarization conversion unit includes a polarization splitting element array including a plurality of polarization splitting films for splitting the incident light beam into two types of linearly-polarized light beams, a plurality of reflecting films for reflecting either one of the linearly-polarized light beams obtained by the polarization splitting films, and a translucent member provided with the polarization splitting films and the reflecting films, a plurality of retardation plates each formed of a quartz crystal member and for converting a polarization axis of either one of the linearly-polarized light beams obtained by the polarization splitting films into a polarization axis of the other of the linearly-polarized light beams, and a spacer member having a predetermined thickness and for bonding end sections of the retardation plates to a light beam exit side of the translucent member.01-15-2009
20090021699Color management system - A color management system includes a light combiner configured for producing a single light output, a color selector positioned to receive the combined light output and configured for selectively modifying the polarization of the combined light output according to the wavelength of the combined light output, an analyzer positioned to receive the emergent light of the color selector and configured for producing an output light having an improved contrast relative to the emergent light of the color selector. An improved color management system is provided that improves image contrast and facilitates color management suitable for use in adverse thermal environments without requiring costly, high index, low birefringence glass via coupling the color selector and the analyzer to the light combiner.01-22-2009
20090086167PROJECTION TYPE IMAGE DISPLAYING APPARATUS - A projection type image displaying apparatus, comprises a light source unit, an illumination optic system including a color separation means therein, a plural number of image display elements, a cross prism, which is configured to function as a color composing means; and a projection optic system, in which an incidence angle onto an image surface is equal to 55 degree or greater than that, and further comprises a structure, which is configured to dispose the projection type image displaying apparatus standing vertically, so as to enable it to display an image on a horizontal surface, wherein a polarized light converting means is provided between the cross prism and the projection optic system, or within the projection optic system, so as to bringing polarization conditions on the image surface for color lights to be substantially equal to one another, by the polarized light converting means, thereby providing the projection type image displaying apparatus of generating no color shading even when projecting an image light, having a large incidence angle to the image surface, onto a horizontal plane or surface.04-02-2009
20090096992PROJECTION DISPLAY DEVICE - In a projection display device, a polarization converting element is provided between an imager and a refracting optical system for converting a polarization direction of light after modulation into a direction radially extending from the center of the optical axis of the refracting optical system. Light transmitted through the polarization converting element is incident onto the refracting optical system in a state of P-polarized light or a state close to the state of P-polarized light. Thereby, the transmittance of light through the refracting optical system is made substantially uniform and increased.04-16-2009
20090231549BEAM COMBINING DEVICE AND PROJECTOR HAVING SUCH BEAM COMBINING DEVICE - A beam combining device and a projector having such a beam combining device are provided. The projector includes a first color light source, a second color light source, a third color light source, a beam combining device, a light valve and a projection unit. The first color light source, the second color light source and the third color light source respectively emit first, second and third color beams. The beam combining device includes a polarization state converting module, a color separation unit and a polarization beam splitter. The optical path lengths of the first color beam emitted from the first color light source to the polarization beam splitter, the second color beam emitted from the second color light source to the polarization beam splitter, and the third color beam emitted from the third color light source to the polarization beam splitter are equal.09-17-2009
20090231548REAR SURFACE PROJECTION TYPE IMAGE DISPLAY DEVICE - A rear projection type image display apparatus having a larger half-power angle and being capable of properly blocking a direct light from a projector for an observer is provided.09-17-2009
20090244488INTEGRATED OPTO-ELECTRONIC DEVICE AND PORTABLE REFLECTIVE PROJECTION SYSTEM - An integrated opto-electronic device, a portable reflective projection system and a method for in situ monitoring and adjusting light illumination are provided. The device includes a reflective polarizing composite film (10-01-2009
20090213333PROJECTION DISPLAY APPARATUS - A projection display apparatus includes a polarization beam splitter, a light source, a polarization changing device, an optical uniformizing element, a light valve module and a projection lens. The light source emits an illumination beam. The polarization beam splitter, the polarization changing device, the optical uniformizing element, and the light valve module are disposed in the optical path of the illumination beam. The polarization beam splitter transmits the illumination beam. The polarization changing device changes the polarization direction of the illumination beam and reflects the illumination beam back to the polarization beam splitter. The optical uniformizing element is between the polarization beam splitter and the polarization changing device for uniformizing the illumination beam. The light valve module converts the illumination beam reflected by the polarization changing device via the polarization beam splitter into an image beam. The projection lens is disposed in the optical path of the image beam.08-27-2009
20090219488Diode or Laser Light Source Illumination Systems - There is provided a first illumination system having at least three diode and/or laser light sources including a red, a green and a blue light source. The first illumination system further has at least three polarizing light converting elements corresponding to each colour of light sources, at least three liquid crystal panels corresponding to each colour of light sources, and at least one prism arrangement. There is also provided a light source module having at least a first diode or laser light source providing light in the visible range, at least a second light source comprising an UV (ultra-violet) or a low wavelength blue diode or laser light source, and a beam splitter or reflection system.09-03-2009
20120170001Image Projection Device - The rotation axis of each mirror of a DMD (07-05-2012
20120105809PROJECTION DEVICE WITH BRIGHTNESS ADJUSTMENT FUNCTION AND METHOD THEREOF - A projection device with an illumination adjustment function includes a polarization beam splitter (PBS), a display, a light source, a lens module, a power supply unit, a light detection unit and a power controller. The light source emits light to the PBS. The lens module projects the images to be displayed by the display. The power supply unit supplies power for the light source. The light detection unit acquires a digital value of a portion of the light transmitted from the PBS, and compares the digital value with a predetermined digital value to generate a control signal. The power controller adjusts power from the power supply unit to the light source according the control signal until the digital value matches the predetermined digital value of the light from the light source.05-03-2012
20120105808VEHICLE DISPLAY SYSTEM - A device for a vehicle that includes an at least partially transparent member operatively connected to the vehicle, the at least partially transparent member having a first side and a second side. A projector emits electromagnetic radiation projecting an image on or in the at least partially transparent member. A first polarizer is positioned on the first side of the transparent member such that the electromagnetic radiation goes through the first polarizer. A second polarizer is positioned on the second side of the at least partially transparent member. The first polarizer and the second polarizer are oriented such that the image is visible from the first side of the at least partially transparent member and not visible from the second side of the at least partially transparent member. The second polarizer may have a second polarization axis that is substantially orthogonal to a first polarization axis of the first polarizer.05-03-2012
20090161073Projection display apparatus - A bundle of rays is incident in a lens array and converted into sub-bundles of rays. The sub-bundles of rays are separated by a color separator into first and second sub-bundles of rays of different colors. The first and the second sub-bundles of rays are combined by other lens arrays into a first and a second bundle of rays of uniform illuminance, respectively. The first and second bundle of rays of uniform illuminance are applied polarization beam splitting and then polarization angle conversion by polarization converters, to be converted into first and second linearly polarized beams, respectively. The second linearly polarized beams are separated by a color separator, provided on an optical path of the second linearly polarized beams, into third and fourth linearly polarized beams of different colors. The first, third and fourth linearly polarized beams are modulated by liquid crystal display devices, provided on optical paths of the first, third and fourth linearly polarized beams, respectively, with input video signals into first, second and third modulated beams. The first, second and third modulated beams are combined by a color combiner into a combined bundle of rays to be projected for displaying images carried by the video signals.06-25-2009
20090257028PROJECTION TYPE DISPLAY DEVICE - A projection type display device includes: a light emitting unit that includes at least one light source for emitting a coherent light. An image light generating unit modulates the light emitted by the light emitting unit to generate an image light. A projecting unit projects the image light. A phase modulating unit is arranged either between the light emitting unit and the image light generating unit or between the image light generating unit and the projecting unit and has an area where at least one of a retardation value and an azimuth direction of a slow axis is distributed respectively in different directions or values in a plane orthogonal to an optical axis.10-15-2009
20090316115IMAGE DISPLAY APPARATUS AND IMAGE DISPLAY METHOD - An image display apparatus and an image display method, by which a desired image formation state on a retina can be constantly maintained, are provided. Thus, the image display apparatus of the present invention includes a laser light source for emitting laser light; a focus position adjustment section for adjusting a focus position, of the laser light by adjusting a spread angle of the laser light emitted by the laser light source; a scanning section for scanning a predetermined to-be-scanned area by using the laser light adjusted by the focus position adjustment section as scanning light; a light deflection section disposed at the predetermined to-be-scanned area for leading the scanning light to a cornea of the user; a light detection section disposed at a position where the light detection section has an optically conjugate relation with a surface of the cornea through the light deflection section, for detecting a part the scanning light reflected on the surface of the cornea and generating a detection signal; and a control section for controlling the laser light source, the focus position adjustment section, and the scanning section, The control section controls the focus position adjustment section to adjust the focus position of the laser light such that the detection signal generated by the light detection section agrees with an initial setting signal that is set in advance by the light detection section during an initial setting operation.12-24-2009
20100157251ILLUMINATION APPARATUS, PROJECTOR, AND POLARIZATION CONVERSION ELEMENT - An illumination apparatus includes a light source device adapted to emit light having an asymmetric intensity distribution and a polarization conversion element adapted to align polarization states of the light emitted from the light source device. The polarization conversion element includes a splitting section adapted to split incident light input from the light source device into transmitted light and reflected light having the polarization states different from each other in a direction in which an intensity distribution of the incident light is asymmetric, a conversion section adapted to convert the polarization state of one of the transmitted light and the reflected light into the polarization state of the other of the transmitted light and the reflected light, and a mirror system.06-24-2010
20100182571Projection image display apparatus and projection optical system - A projection image display apparatus includes: a light source; an illumination optical system that uniformly irradiates a surface of an image modulation element serving as a primary image surface with a light beam emitted from the light source; and a projection optical system that enlarges and projects image information on the primary image surface modulated by the image modulation element onto a screen serving as a secondary image surface, and that includes a first optical system that forms an intermediate image from the image information, a single-image second optical system that enlarges and projects the intermediate image to display a single image on the screen, a plural-image second optical system that enlarges and projects the intermediate image to display plural images on the screen, and an optical path switching mechanism that selectively guides a light beam from the first optical system to the single-image or plural-image second optical system.07-22-2010
20100182572 POLARIZER ASSEMBLY AND A REFLECTIVE MODULATION-IMAGER PROJECTION SYSTEM - The present application relates to a polarizer assembly and a reflective modulation-imager projection system. The polarizer assembly comprises a light source, a polarization beam splitter assembly, a first reflective quarter wave composite plate and a second reflective quarter wave composite plate. The light source is used for inducing a first polarized light and a second polarized light in a first direction. The polarization beam splitter assembly comprises a first polarization beam splitting film and a second polarization beam splitting film. The first polarization beam splitting film is used for reflecting the first polarized light as a first polarization reflected light in a second direction while transmitting the second polarized light. The second polarization beam splitting film is used for transmitting the second polarized light. The first reflective quarter wave composite plate is used for reflecting, while polarization rotating as a third polarized light. The second polarization beam splitting film receives and reflects the third polarized light as a second polarization reflected light in the first polarization state. The second reflective quarter wave composite plate is used for respectively reflecting, while polarization rotating, the first polarization reflected light and the second polarization reflected light as a first output light and a second output light in the second polarization state in opposition to the second direction. The utilization ratio of the illumination lights could be increased.07-22-2010
20100259726DISPLAY APPARATUS - A display apparatus includes: a light modulation section having a plurality of translucent window sections; a light emitting section having a light source adapted to emit light; a light guide section having a tubular reflecting surface having a function of guiding the light from the light source to the light modulation section; and a light separation section provided to the light modulation section and disposed in a vicinity of the light source in parallel to or in substantially parallel to a lateral cross-sectional surface of the tubular reflecting surface, and having a light separation surface having a function of separating the light from the light guide section into transmitted light transmitted toward the light modulation section and reflected light reflected toward the light guide section, wherein the tubular reflecting surface narrows from the light modulation section toward the light emitting section so as to guide the reflected light to the translucent window sections, denoting a lateral cross-sectional area of an inside area of the tubular reflecting surface at an end on the light source side as S10-14-2010
20100259727OPTICAL UNIT - Disclosed is an optical unit for an image display device, the unit including: one or a plurality of light sources; one or a plurality of optical elements that control a spread of light; a combining element that combines the beams of light emitted from the light sources; and a scanning element, wherein the light from each of the light sources generates an elliptical beam spot on a screen and the spot has a major axis substantially perpendicular to a scanning direction, the result is that the unit is simple in structure, inexpensive, compact, lightweight, and capable of providing high-resolution image quality, thus providing the display device reduced dimensionally and in weight. Such an image display device using the optical unit is also disclosed.10-14-2010
20100225885PROJECTOR - A projector includes: a first optical device, and a first color combining optical device; a second optical device, and a second color combining optical device; a combining optical device adapted to combine emission light emitted respectively from the first optical device and the second optical device; a first polarization conversion device disposed between the first optical device and the combining optical device, and adapted to align a polarization direction of the emission light from the first optical device into a first polarization direction; and a second polarization conversion device disposed between the second optical device and the combining optical device, and adapted to align a polarization direction of the emission light from the second optical device into a second polarization direction.09-09-2010
20100253920PROJECTOR - A projector includes: a light source which emits light; a light modulating device which modulates the light emitted from the light source according to image information; an image forming system which forms an image corresponding to the optical image formed by the light modulating device of modulated light which is modulated by the light modulation device at an image forming position; a polarized light emitting unit disposed at the image forming position of the image forming system to selectively convert the polarization direction of a part of entering light; and a projecting device which projects the light from the polarized light emitting unit.10-07-2010
20100238410OPTICAL ELEMENT, ILLUMINATION APPARATUS, AND PROJECTION DISPLAY APPARATUS - An optical element includes a mirror surface configured to transmit certain part of incident light and to reflect the other part of the incident light. The mirror surface has a first region and a second region. The first region includes a first polarization conversion layer configured to convert a polarization direction of incident light incident on the first region from one linear polarization into a different linear polarization. A region of the optical element from which light transmitted through the first region is emitted includes a second polarization conversion layer configured to convert a polarization direction of the light transmitted through the first region from the different linear polarization into the one linear polarization.09-23-2010
20110058145POLARIZED, LED-BASED ILLUMINATION SOURCE - An illumination source includes a number of light emitting diodes (LEDs) operating at a first wavelength. Light from the LEDs illuminates a phosphor material that generates light at a second wavelength. A reflective polarizer transmits light at the second wavelength in a first polarization state and reflects light at the second wavelength in a second polarization state orthogonal to the first polarization state. The light at the second wavelength reflected by the reflective polarizer is directed back towards the phosphor material without an increase in angular range. In some embodiments the LEDs, having a conformal layer of phosphor material, are attached directly to the first surface of a liquid cooled plate. A liquid coolant contacts a second surface of the plate.03-10-2011
20100208210STRESS BIREFRINGENCE COMPENSATION IN POLARIZING BEAMSPLITTERS AND SYSTEMS USING SAME - An optical system is provided. The optical system comprises a first polarizing beamsplitter (PBS), a first reflecting image-forming device, and a first quarter-wave retarding element. An optical system is also provided that comprises an image-forming device, a reflective polarizing layer, at least a first birefringent element disposed on an optical path between the image-forming device and the polarizing layer, and a quarter-wave retarding element. Further provided is an optical system comprising a color combiner unit, at least two polarizing beamsplitters (PBSs), and a first quarter-wave retarding element. The present application also provides methods of compensating for birefringence in an image projection system.08-19-2010
20100220295OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide (09-02-2010
20100220294SHORT WAVELENGTH LIGHT SOURCE AND OPTICAL DEVICE - A GaN-based semiconductor laser (09-02-2010
20100195056HYBRID POLARIZATION BEAM SPLITTER ARCHITECTURE AND OPTICAL PROJECTION SYSTEM THEREOF - A hybrid PBS architecture includes a first prism, a second prism, and a beam splitting coating layer. The first prism is made of a first material, and the second prism is made of a second material being different from the first material. The beam splitting coating layer is sandwiched between the first prism and the second prism. The first material is a glass material and the second material is a plastic material.08-05-2010
20090141243Projection type display apparatus with means for supplying an air cooling stream to a gap between a light receiving surface of a prism and a third surface of a closed triangular prismatic housing - A projection type display apparatus includes: a reflective polarizing plate for each color light which transmits each of R light, G light and B light having a P polarized component subjected to color separation by a color separation optical system therethrough, allows each transmitted light to enter a corresponding reflective liquid crystal panel for each color light, and reflects image light of each color having an S polarized component which has been subjected to light modulation in accordance with an image signal of each corresponding color light by the reflective liquid crystal panel for each color light; a transmission type polarizing plate for each color light which removes an unnecessary polarized component from the image light of each color reflected by the reflective polarizing plate for each color light; a color combination optical system which subjects the image light of each color transmitted through the transmission type polarizing plate for each color light to color combination; and a projection lens, wherein the transmission type polarizing plate for each color light is air-cooled by air-cooling means when the transmission type polarizing plate for each color light faces each incidence surface of the color combination optical system.06-04-2009
20110032486PROJECTOR AND METHOD FOR MANUFACTURING PROJECTOR - A projector includes: a spatial light modulator provided for each color light flux and configured to modulate the light flux in accordance with an image signal; a light combining system configured to combine the color light flux outputted from the spatial light modulator; a projection system configured to project the light combined by the light combining system; a fixing member configured to integrally fix the spatial light modulator, the light combining system, and the projection system; a base on which the spatial light modulators and the light combining system fixed to the fixing member are mounted; and a cover member configured to cover the spatial light modulator and the light combining system mounted on the base, wherein the base and the cover member form a cooling duct through which cooling air for sequentially cooling the spatial light modulator for the respective color light flux flows.02-10-2011
20110032485Optical Projection Device and Projecting Method Thereof - An optical projection device includes a laser engine, a first wave plate and a lens. The laser engine provides light. The first wave plate changes a light phase. The lens focuses light. A projecting method of an optical projection device includes providing a light including a first P polarized light, a first S polarized light, and a second S polarized light, and projecting light through a wave plate on a screen, wherein the wave plate moves in a direction perpendicular to light. A projecting method of an optical projection device includes providing light including a first P polarized light, a first S polarized light, and a second S polarized light, and projecting light through a wave plate on a screen, wherein the wave plate rotates around an axis parallel to a projecting direction of light.02-10-2011
20100315596WIDE COLOR GAMUT PROJECTOR - A wide color gamut projector having a plurality of dichroic prisms configured to split a light beam into six primary color components and direct each of the six primary color components to separate digital micromirror devices is disclosed. The projector further comprises a translucent rotatable drum having different polarization sections, wherein the light beam is capable of being passed orthogonally through a wall of the drum.12-16-2010
20130135590PROJECTION APPARATUS - There is provided a projection apparatus including a color synthesis section, a polarization conversion section, and a projection lens. The color synthesis section is configured to combine three-primary color light and emit combined light. The polarization conversion section is disposed on a light-emission side of the color synthesis section, the polarization conversion section being configured to put the color light in the combined light in a non-polarized state uniformly in all directions. The projection lens is configured to emit light provided by the polarization conversion section.05-30-2013
20100302510LIGHT SOURCE DEVICE, ILLUMINATION SYSTEM, AND PROJECTOR - A light source device includes: a light source which emits light; a first reflector which surrounds a part of the light source and reflects the light emitted from the light source in the direction of an optical axis; and a second reflector which surrounds at least a part of the light source different from the part surrounded by the first reflector and reflects the light emitted from the light source toward the first reflector, wherein the position of a convergence spot of the light reflected by the second reflector is displaced from the position of an emission spot of the light source at least in the direction of a plane perpendicular to the direction of the optical axis.12-02-2010
20100315597Apparent Speckle Reduction Via Beam Offset Diversity in Pupil Space - Briefly, in accordance with one or more embodiments, beam position diversity or beam offset diversity in pupil space performs the complement to angular diversity by maintaining angular content of a beam while changing its position and/or polarization properties in pupil space over time.12-16-2010
20110001934ILLUMINATION OPTICAL UNIT AND DISPLAY APPARATUS HAVING THE SAME - An illumination optical unit and a display apparatus having the same are provided. The display apparatus includes an illumination optical unit which generates and illuminates light; a display element which forms an image by the light illuminated from the illumination optical unit; and a projection optical unit which projects the image formed in the display element on a screen. The illumination optical unit includes a light source which includes a light emitting area, and a polarization converting unit which includes a plurality of polarization prisms which polarize and convert an entering light from the light source. The light source is disposed so that a long width of the light emitting area corresponds to a long width of the polarization prisms.01-06-2011
20110025983Integrated Photonics Module and Devices Using Integrated Photonics Modules - An integrated photonics module includes at least one light source and a MEMS scanner coupled to and held in alignment by an optical frame configured for mounting to a host system. According to some embodiments, the integrated photonics module may include a plurality of light sources and a beam combiner coupled to the optical frame. According to some embodiments, the integrated photonics module includes a selective fold mirror configured to direct at least a portion of emitted light toward the MEMS scanner in a normal direction and pass scanned light through to a field of view. The selective fold mirror may use beam polarization to select beam passing and reflection. The integrated photonics module may include a beam rotator such as a quarter-wave plate to convert the polarization of the emitted light to a different polarization adapted for passage through the fold mirror. The integrated photonics module may include one or more light detectors.02-03-2011
20110032487COLOR SPLITTER AND COMBINER SYSTEM AND PROJECTION DISPLAY APPARATUS - A color splitter and combiner system includes a first transparent member located on an optical path between a first polarization beam splitter and an optical path combiner, and a second transparent member located on an optical path between a second polarization beam splitter and an optical path combiner. 0.05 (mm)<|t1/v1−t2/v2|<1.00 (mm) is met, where t1 is a thickness of the first transparent member, t2 is a thickness of the second transparent member, v1 is an Abbe number of a material of the first transparent member, and v2 is an Abbe number of a material of the second transparent member.02-10-2011
20110242491PROJECTOR OPTICAL SYSTEM - Disclosed is a projector optical system, the system including an illumination unit including illumination lenses illuminating light downwards, a display device receiving light illuminated from the illumination lenses to enable to realize an image, projection lenses downwardly projecting light emitted from the display device to a screen, and a field lens changing an optical angle of the light illuminated from the illumination lenses and emitting the light to the display device, and changing an optical angle by receiving an image light of the display device and emitting the light to the projection lenses.10-06-2011
20100165296Projection Display Apparatus - A projection display apparatus 07-01-2010
20110211166PROJECTOR DEVICE - A projector device including a light source, a plurality of panels for modulating light emitted from the light source in accordance with video information, the panels containing a liquid crystal panel and a plurality of polarizing panels arranged in parallel, an air blower for blowing air to the liquid crystal panel and the plurality of polarizing panels, a housing in which the light source, the liquid crystal panel, the polarizing panels and the air blower are mounted, and a turbulence promoting member for disturbing an air stream flowing between two adjacent panels is provided at an upstream position of the air stream in a gap between the two adjacent panels so as to extend in a direction perpendicular to the air stream.09-01-2011
20110063579PROJECTING SYSTEM - A projecting system is disclosed. The projecting system includes: a light source; a lens group disposed on the exit of the light source, wherein the lens group comprises a polarizing beam splitter; and at least one rectangular prism disposed on one side of the prism group and between the polarizing beam splitter and the light source.03-17-2011
20110211165SPECKLE PATTERN SCRAMBLING IN LASER PROJECTION SYSTEMS - A laser projection system is provided comprising a light source, a phase retarding element, and a beam scanning element. The light source comprises at least one frequency-converted laser source comprising a wavelength-tunable laser diode and a wavelength conversion device. The phase retarding element is configured to resolve the polarization of a frequency-converted laser beam into two orthogonal linearly polarized components such that one component of polarization is phase delayed relative to the other. Frequency-converted laser beam polarization in the 2D image frame is a function of the degree to which the respective components of polarization are delayed relative to each other and varies with wavelength variations in the output of the wavelength-tunable laser diode. Polarization variations of the frequency-converted laser beam in the 2D image frame are sufficient to scramble image speckle patterns across the 2D image frame. In another embodiment of the present disclosure a laser projection system is provided where the system comprises a wavelength-tunable laser diode comprising a phase control section. The laser projection system is programmed to apply a dither signal to the phase control section and the dither signal introduces wavelength variations in the output of the wavelength-tunable laser diode. The wavelength variations in the output of the wavelength-tunable laser diode reside within a FWHM conversion bandwidth of the wavelength conversion device and are at a rate that is sufficient to scramble pixel-specific polarizations and image speckle patterns across the 2D image frame. Methods of operating laser projection systems are also provided.09-01-2011
20090323025OPTICAL DEVICE AND PROJECTOR - An optical device includes: a plurality of reflection type light modulation devices; a plurality of reflection type polarization plates; a plurality of attachment members; a color combining device; a plurality of adjustment members; engaging projections provided on either the attachment members or the adjustment members and projecting toward the others of the attachment members and the adjustment members; and engaging receivers provided on the others of the attachment members and the adjustment members such that the engaging projections are inserted into the engaging receivers with clearances between the engaging receivers and the engaging projections.12-31-2009
20100014054PROJECTION DISPLAY APPARATUS FOR SUPPRESSING SPECKLE NOISE - A projection display apparatus of the present invention can include a light source; an optical modulator, configured to repeatedly output a modulation beam N times in a predetermined time range, the modulation beam being generated by identically modulating a bema of light emitted from the light source and N being a nature number and equal to or greater than 2; a mirror, configured to reflect the modulation beam, which is repeatedly outputted N times, to scan the modulation beam to an identical point of a screen; and a polarization rotating unit, configured to rotate a polarization direction of the modulation beam for each time the modulation beam is scanned. With the present invention, the speckle noises on a video scanned to a screen can be suppressed.01-21-2010
20100053559IMAGE PROJECTION APPARATUS AND IMAGE DISPLAY SYSTEM - An image projection apparatus includes light sources 03-04-2010
20100053558PROJECTOR - A projector includes: a light modulation unit that modulates illumination light; a projection unit that projects image light modulated by the light modulation unit; and a holder that holds an optical filter and a cover in such a way that the optical filter and the cover can be alternately switched and positioned in an optical path on the light-exiting side of the projection unit.03-04-2010
20110075100PROJECTION TYPE IMAGE DISPLAY DEVICE - A projection type image display device using, in a projection optical system thereof, a flat mirror, which is easy to design and manufacture, as a projection mirror is provided. The projection optical system is a diagonal projection optical system and includes plural lenses. Among the plural lenses, the one disposed closest to the flat mirror has an effective area, along the vertical direction of an image, through which a light beam passes and which is off the optical axis, among optical axes of the plural lenses, shared by the most lenses so as not to allow light reflected from the projection mirror to return to the projector body. A polarization converter using, for example, a quarter wavelength plate is provided at an output surface of a crossed prism to decrease reflectance differences between differently colored light and to thereby prevent the occurrence of color unevenness.03-31-2011
20120200832IMAGE PROJECTION DEVICE, IMAGE PROTECTION METHOD, DISTANCE MEASURING DEVICE AND DISTANCE MEASURING METHOD - An image projection device includes: a variable-focus lens (08-09-2012
20110043761PROJECTOR - A projector includes: a first solid-state light source device which includes a first solid-state light source emitting excitation light, and a fluorescent layer converting excitation light emitted from the first solid-state light source to light including a first color light component and a second color light component different from the first color light component, and emitting converted light; a second solid-state light source device which includes a second solid-state light source emitting a third color light component different from the first color light component and the second color light component; a light modulation device modulating the first color light component, the second color light component, and the third color light component in accordance with image information; and a projection optical system projecting the modulated light components from the light modulation device as a projection image.02-24-2011
20090015796ILLUMINATION APPARATUS AND PROJECTION DISPLAY APPARATUS - The illumination apparatus includes a color separator configured to separate a white light beam, emitted from a white light source, into a plurality of color component light beams, a plurality of imagers each configured to modulate a corresponding one of the plurality of color component light beams separated by the color separator and a polarization modulator provided on a light incident side of one imager included in the plurality of imagers. The polarization modulator modulates a polarization direction of a modulation-object light beam which is part of a color component light beam guided to the one imager.01-15-2009
20100296060INTEGRATED MICRODISPLAY PROJECTION AND IMAGING SYSTEM - An integrated microdisplay projection and imaging system includes: a focus-adjustable lens system, a planar polarization beam splitter, a reflective polarization modulation imager and an imaging sensor with a post polarizer in orthogonal polarization orientation to the planar polarization beam splitter, as well as a lighting module. Placed on two separate sides of the planar polarization beam splitter, the reflective polarization modulation imager and the imaging sensor have substantially equal-length optical passes through the planar polarization beam splitter to the focus-adjustable lens system, and thus the focus-adjustable lens system provides a unified means for adjusting focus with both the reflective polarization modulation imager and the imaging sensor, relative to an external object such a projection screen or an imaging object.11-25-2010
20110249239PROJECTION SYSTEM - A projection system is disclosed, the projection system including: an illumination unit; a PBS (Polarizing Beam Splitter) reflecting the light from the illumination unit, transmitting an image light, having a width larger than that of entrance pupil through which the image light is incident, and having a structure in which a width of an area facing projection lenses is larger than that of an area perpendicular to an area facing the projection lenses; a display device receiving the light reflected from the PBS and outputting the light as an image light; and a projection unit mounted with the projection lenses for projecting the image light outputted from the display device to a screen.10-13-2011
20110249238PROJECTION SYSTEM FOR SIMULTANEOUSLY OUTPUTTING IMAGE LIGHT SOURCE WITH DIFFERENT POLARIZATIONS AND METHOD OF USING THE SAME - A projection system for simultaneously outputting image light source with different polarizations includes a polarizing beam splitting module, an image display module and an image projecting module. The polarizing beam splitting module has a first polarizing beam splitting element for receiving light source, a second polarizing beam splitting element, a third polarizing beam splitting element and a fourth polarizing beam splitting element. The image display module has a first reflective image display panel disposed beside the second polarizing beam splitting element and a second reflective image display panel disposed beside the third polarizing beam splitting element. The image projecting module has at least one projection lens disposed beside the fourth polarizing beam splitting element.10-13-2011
20100091247SINGLE PROJECTION DISPLAY DEVICE - Linearly polarized illumination light that is emitted from a light source unit and then reaches a polarized light separation plane along the optical axis of an illumination optical unit is reflected from the polarized light separation plane at a right angle and reaches a reflection optical unit. The reflection optical unit reverses the phase of the linearly polarized illumination light and reflects the illumination light to the polarized light separation plane. The illumination light passes through the polarized light separation plane and reaches a reflective liquid crystal display device. The reflective liquid crystal display device converts the illumination light into modulated light having image information thereon. In this case, the phase of the linearly polarized light is reversed again and reflected from the polarized light separation plane at a right angle to reach a projection lens. The light is enlarged and projected onto a screen.04-15-2010
20120200831OPTICAL ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTION-TYPE DISPLAY DEVICE - An optical element is provided with: first polarization-separation layer (08-09-2012
20120200830PROJECTOR - A projector includes: a light source device; a light modulation device adapted to modulate a light beam emitted from the light source device; a light transmissive substrate adapted to transmit the light beam modulated by the light modulation device; and a projection optical device adapted to project the light beam transmitted through the light transmissive substrate, wherein the light modulation device includes a first light modulation unit having a plurality of pixels arranged, the pixels having colors different from each other, and the light transmissive substrate is disposed so as to be tilted with respect to an imaginary plane perpendicular to a light axis of the light beam modulated by the first light modulation unit.08-09-2012
20080304015COLOR FILTERING DEVICE - A color filtering device including a color filter, a plurality of polarization beam splitting units, a plurality of reflecting units, and a plurality of wave plates is provided. The color filter has a plurality of filtering parts and a plurality of light shielding parts alternately arranged thereon. Each of the polarization beam splitting units is disposed in front of one of the filtering parts and makes an angle with a corresponding filtering part. Each of the reflecting units is disposed in front of one of the light shielding parts and makes an angle with a corresponding light shielding part. Each of the wave plates is substantially parallel to one of the filtering parts. Each of the polarization beam splitting units is disposed between a pair of a wave plate and a filtering part. The color filtering device has both color filtering function and polarization conversion function.12-11-2008
20110187999PROJECTION TYPE DISPLAY APPARATUS - A projection type display apparatus including a light source, a display element, an illumination optical system and a projection lens to project a magnified image of the optical image. The illumination optical system includes a first array lens and a second array lens, each includes a plurality of lens elements arranged in a matrix, each of the lens elements having a rectangular opening, and a polarization conversion element having polarization conversion function by use of a plurality of polarized beam splitters and a plurality of half-wave phase plates, arranged in an array and opposing to the lens elements of the second array lens, to emit predetermined polarized light. The light source includes a light emitting plane of a rectangle or an ellipse shape, a longitudinal direction of the light emitting plane being parallel to a longitudinal direction of each opening of the polarization conversion element.08-04-2011
20120229772ILLUMINATION APPARATUS AND PROJECTION DISPLAY APPARATUS - An illumination apparatus includes multiple liquid crystal panels, a polarization-state adjusting element, and a cross dichroic prism. A green component light includes a central-wavelength component light, a short-wavelength component light, and a long-wavelength component light. The polarization-state adjusting element separately adjusts a polarization state of the central-wavelength component light and each of polarization states of the long-wavelength component light and the short-wavelength component light.09-13-2012
20110164221System and Method for Efficiently Delivering Rays from a Light Source to Create an Image - In accordance with one embodiment of the present disclosure, a system may include a polarizing beamsplitter for splitting one or more unpolarized rays received from an illumination source into a first polarized component and a second polarized component, the first polarized component and the second polarized component having orthogonal polarizations to each other. The system may also include a half-wave plate for rotating the second polarized component to the same polarization as the first polarized component. The system may further include a lens group for passing the first polarized component to a target plane as a first polarized ray, and further for separately passing the second polarized component to the target plane as a second polarized ray.07-07-2011
20120147330ILLUMINATING DEVICE AND PROJECTION DISPLAY DEVICE USING THE SAME - Provided is an illuminating device that includes: first light guiding means (06-14-2012
20110051093POLARIZATION CONVERSION APPARATUS AND PROJECTION SYSTEM USING SAME - A polarization conversion apparatus capable of converting natural incident light into linear light with single polarization for emission includes a plurality of prisms arrayed as a whole component, a plurality of half-wave plates arranged at emission surfaces of some of the prisms, and a plurality of faying surfaces defined inside and a plurality of side surfaces defined outside. Some of the faying surfaces include polarization beam splitting films formed thereon to form polarization beam splitting surfaces, and one faying surface and the side surfaces include total reflection films formed thereon to form total reflection surfaces.03-03-2011
20100110385MULTIMEDIA PLAYER DISPLAYING 2 PROJECTION IMAGES - A multimedia player for providing two projection images is provided. The multimedia player for displaying two projection images includes: a first projection unit displaying a first projection image; and a second projection unit displaying a second projection image. The first projection unit includes: a first driving unit controlling an operation of the first projection unit and providing an image signal on the first projection image to be displayed; a first light source unit; a first light modulation device outputting the first projection image by modulating light provided from the light source in response to the image signal of the first projection image; and a first projection lens unit magnifying and projecting an image that is output from the first light modulation device. The structure of the first projection unit is the same as that of the second projection unit. The multimedia player further includes a screen sensing unit sensing a color of an area in which an image is to be displayed. The first and second driving units detect a complementary color of a color sensed by the screen sensing unit and increase brightness of a light source corresponding to the complementary color among light sources of the first and second light source units or image data corresponding to the complementary color among image data to be displayed, thereby improving visibility.05-06-2010
20100220293PROJECTOR - A multipurpose projector 09-02-2010
20100149493Shared-Field Projection and Imaging System - According to one embodiment of the present invention a method for capturing images on a screen is disclosed. The method includes directing light from a surface of a spatial light modular to an image field using a projection system; capturing light from the image field using the projection system, the projection system directing at least a portion of the captured light to the spatial light modulator; and directing at least a portion of the received captured light to an image capture system using the spatial light modulator.06-17-2010
20110187998PROJECTION TYPE DISPLAY APPARATUS - A projection type display apparatus includes: an illumination optical system which has a first array lens and a second array lens each of which has a plurality of lens elements having a plurality of rectangular shape openings and arranged in a matrix form; an illumination light source device which has one or more light sources having a polarization degree not smaller than 50% and one or more polarizers for transmitting one type polarized light and reflecting other type polarized light. At least one set of the light sources are arranged so that the polarization directions of light fluxes having high polarization degrees may be perpendicular to each other, the light fluxes are combined by the polarizer, condensed to a single region by a light-flux condensing element, and then directed toward another illumination optical system located in a subsequent stage.08-04-2011
20110304828PASSIVE ALIGNMENT METHOD AND ITS APPLICATION IN MICRO PROJECTION DEVICES - An optical micro-projection system has at least one light source (401), at least one mirror (200) based on MEMS technology for deviating light from said light source, at least one beam splitter (403), and at least one wave plate (400). Each component has parallelepiped profiles with contact faces (500) on at least one side. Mutual alignment of at least two of the components is provided by mutual direct contact between reference contact faces (500) of the components. The architecture enables avoiding the use of dynamic optical assembly methods and to minimize the light loss within the system.12-15-2011
20110304825PROJECTION DISPLAY AND METHOD OF DISPLAYING AN OVERALL PICTURE - A projection display includes at least one light source, at least one reflective image generator configured to represent frames in a two-dimensional distribution of subareas of same, a projection optics arrangement having a two-dimensional arrangement of optical projection elements and being configured to image an associated subarea of the at least one image generator onto an image plane in each case, so that images of the frames superimpose within the image plane to form an overall picture, and at least one beam splitter arranged within an optical path between the at least one reflective image generator and the two-dimensional arrangement of optical projection elements, on the one hand, and the optical path between the at least one light source and the at least one reflective image generator, on the other hand.12-15-2011
20120002171PROJECTION LENS MODULE OF PICO PROJECTOR - The projection lens module contains a number of lenses, a stop, a PBS (polarizing beam splitter), and a LCoS (liquid crystal on silicon) panel. The lenses, from outside towards inside, contains a negative first lens, a positive second lens attached to the negative first lens, a negative third lens, a positive fourth lens forming a doublet structure with the negative third lens, and a positive fifth lens. The stop is positioned between the positive second lens and the negative third lens. The PBS is positioned between the positive fifth lens and the LCoS panel, and the positive fifth lens has an area larger than that of the LCoS panel. The LCoS panel is positioned behind the PBS. The projection module is able to overcome the size issue of the projection lens module, to enhance image resolution and to reduce image distortion.01-05-2012
20110063578ILLUMINATION OPTICAL SYSTEM AND IMAGE PROJECTION APPARATUS - The illumination optical system includes an integrator configured to divide light from a light source into plural light fluxes, and a collection optical system configured to collect the plural light fluxes from the integrator toward an illumination surface. A rear principal point of the collection optical system is located closer to the light source than a front principal point of the collection optical system. The configuration provides a compact illumination optical system which brightly illuminates the illumination surface with the light and enables high contrast image projection.03-17-2011
20110317130Methods for Operating Scanning Laser Projectors to Reduce Speckle and Image Flicker - Methods for operating a light source of a scanning laser projector to reduce speckle and image flicker in projected images are disclosed. The methods generally include projecting an image comprising a plurality of frames with a light source of the scanning laser projector. Simultaneously, a speckle reduction sequence comprising uncorrelated speckle patterns and partially correlated speckle patterns is projected with the light source of the scanning laser projector. The speckle reduction sequence is projected by varying a property of an output beam of the light source of the scanning projector. The duration of the speckle reduction sequence may be less than about 0.04 seconds or from about 0.07 seconds to about 0.13 seconds.12-29-2011
20090009721STRESS BIREFRINGENCE COMPENSATION IN POLARIZING BEAMSPLITTERS AND SYSTEMS USING SAME - An optical system is provided. The optical system comprises a first polarizing beamsplitter (PBS), a first reflecting image-forming device, and a first quarter-wave retarding element. An optical system is also provided that comprises an image-forming device, a reflective polarizing layer, at least a first birefringent element disposed on an optical path between the image-forming device and the polarizing layer, and a quarter-wave retarding element. Further provided is an optical system comprising a color combiner unit, at least two polarizing beamsplitters (PBSs), and a first quarter-wave retarding element. The present application also provides methods of compensating for birefringence in an image projection system.01-08-2009
20120062848PROJECTION TYPE DISPLAY APPARATUS - A projection type display apparatus includes: a light source section including at least one light source for emitting coherent light; an image light generating section for modulating the light emitted from the light source section so as to generate image light; a projection section for projecting the image light; and a depolarization element for transmitting the incident light in a state that a polarization state of at least a part of the light is changed, the depolarization being provided on an optical path of the light emitted from the light source section, wherein a plurality of unit regions having a particular shape are aligned in the depolarization element.03-15-2012
20120002172LIGHT SOURCE APPARATUS AND PROJECTION DISPLAY APPARATUS - A light source apparatus according to an embodiment includes: a light source that emits narrow-band exciting light; a polarization adjusting element that adjusts a polarization state of the exciting light; a light guide element capable of changing a direction of the exciting light according to the polarization state adjusted by the polarization adjusting element; and a luminous body which is provided on an optical path of the exciting light guided by the light guide element, and which emits predetermined component light excited by the exciting light.01-05-2012
20120008096OPTICAL ELEMENT AND COLOR COMBINER - Optical elements, color combiners using the optical elements, and image projectors using the color combiners are described. The optical element includes light recycling stacks, a polarizing beam splitter, and a color-selective stacked retardation polarizing filter. The polarizing beam splitter includes a first reflective polarizer aligned to a first polarization direction. Each light recycling stack includes a second reflective polarizer aligned to the first polarization direction, and a retarder aligned at 45 degrees to the first polarization direction. The color combiner includes partially reflective light sources coupled to the optical element. Un-polarized light having different colors can enter the color combiner through the light recycling stacks, and combined light of a desired polarization state can exit the color combiner. Light having an undesired polarization state can be recycled to the desired polarization state within the color combiner, so that light utilization efficiency is increased. The image projector includes a color combiner coupled to an imaging source and projection elements, so that a first portion of the combined light is directed to the projection element, and a second portion of the combined light is recycled back into the color combiner.01-12-2012
20120008097MANUFACTURING METHOD OF PROJECTION APPARATUS, MANUFACTURING EQUIPMENT OF PROJECTION APPARATUS, AND PROJECTION APPARATUS - A manufacturing method of a projection apparatus includes forming a modulation device unit in which a reflective light modulation device and a reflective polarizer are fixed to predetermined relative positions, and adjusting a position of the reflective light modulation device relative to a projection optical device by shifting a position of the modulation device unit with respect to the projection optical device.01-12-2012
20090207379Integrated Optical Polarization Combining Prism for Projection Displays - In an embodiment, an optical component is provided. The optical component includes a first polarizing prism having a first face, a second face and a third face. The light beam may be received incident on the first face. Light having a first polarization may be output through a second face and light having a second polarization may be output through a third face. The optical component further includes a half-wave plate fastened to the second face of the first polarizing prism. The optical component further includes a first reflecting prism connected to the third face of the first polarizing prism. The first reflecting prism has a first face and a second face, the first face connected to the third face of the first polarizing prism. The optical component further includes a second reflecting prism connected to the half-wave plate and to the second face of the first reflecting prism. The second reflecting prism has a first face, a second face and a third face. The first face of the second reflecting prism connected to the half-wave plate and the second face of the first reflecting prism. The optical component may be used in a projector, among other potential applications in some embodiments.08-20-2009
20120013850LIGHT EMITTING APPARATUS, ILLUMINATOR, AND PROJECTOR - A light emitting apparatus includes a first rod integrator and a second rod integrator supported by a support substrate and a light emitting device disposed between the first rod integrator and the second rod integrator. The light emitting device emits a plurality of light beams to be incident on the first rod integrator and a plurality of light beams to be incident on the second rod integrator. Each of the rod integrators has a light incident surface on which the plurality of light beams are incident, a bent portion that changes the propagating direction of the plurality of incident light beams, and a light exiting surface through which the plurality of light beams mixed with each other exit.01-19-2012
20100315598PROJECTION OPTICAL SYSTEM AND PROJECTION-TYPE DISPLAY APPARATUS USING THE SAME - A projection optical system can achieve compactness and improve a state where polarized rays are separated by a polarized light separation section, without a separate optical system which makes the whole system telecentric, by using a reflective light valve. The projection optical system includes, in order, the reflective light valve, a projection lens and the polarized light separation section. The reflective light valve modulates incident illumination light in response to an input image signal and reflects and emits the modulated light. The projection lens transmits the illumination light incident to the reflective light valve and the modulated light emitted from the reflective light valve and is formed to be telecentric on the reduction side. The polarized light separation section separates the optical path of the illumination light incident to the projection lens from the optical path of the modulated light emitted from the projection lens.12-16-2010
20120154755ILLUMINATING DEVICE AND PROJECTION DISPLAY DEVICE USING THE SAME - An illuminating device includes: light source (06-21-2012
20120026469PROJECTOR - A projector according to an embodiment of the invention includes: an illumination device adapted to generate an illumination light; and a light modulation device adapted to modulate the illumination light in accordance with image information, wherein the illumination device includes a first illumination device including a fluorescence generation section adapted to generate a fluorescence from an excitation light generated by a first solid-state light source, and a second illumination device including a rod integrator optical system adapted to equalize an in-plane light intensity distribution of a colored light generated by a second solid-state light source.02-02-2012
20110102746HALF-WAVE PLATE, OPTICAL PICKUP DEVICE, POLARIZATION CONVERSION ELEMENT, AND PROJECTION DISPLAY DEVICE - A half-wave plate includes a single crystal plate made of an inorganic material having a birefringent property and rotatory power, wherein a polarization plane of linearly polarized light entering from an entrance surface of the crystal plate is rotated and then output from an exit surface of the crystal plate.05-05-2011
20120162609IMAGE DISPLAY APPARATUS CAPABLE OF DISPLAYING THREE-DIMENSIONAL IMAGE - An image display apparatus includes an image display element configured to modulate incident light from a light source, a polarization splitting element that has characteristics of transmitting first polarized light and reflecting second polarized light different from the first polarized light and that is configured to synthesize image light from the image display element to be introduced into a projection optical system, and a phase difference plate that is disposed at a side of the projection optical system relative to the polarization splitting element. The phase difference plate has an optic axis in a direction different from a surface normal direction and an in-plane direction of the phase difference plate.06-28-2012
20120249970POLARIZATION BEAM SPLITTING ELEMENT AND IMAGE PROJECTION APPARATUS - The polarization beam splitting element includes a one-dimensional grating structure having a grating period smaller than a wavelength of an entering beam and including a metal grating portion, and two light-transmissive members each having a refractive index higher than that of air. The one-dimensional grating structure is disposed between the two light-transmissive members. The grating period of the one-dimensional grating structure is 120 nm or less, a thickness of the one-dimensional grating structure is 100 nm or less and an inter-grating portion of the one-dimensional grating structure is formed as a vacuum space or formed of air or a dielectric material. The grating period Λ [nm], a filling factor FF that is a ratio w/Λ of a width w [nm] of the grating portion to the grating period, a refractive index n10-04-2012
20120249969POLARIZATION BEAM SPLITTING ELEMENT AND IMAGE PROJECTION APPARATUS - The polarization beam splitting element splits an entering beam according to polarization directions. The element includes, in order from a beam entrance side, an entrance side multi-layered film layer constituted by laminated multiple dielectric films, and a one-dimensional grating structure having a grating period smaller than a wavelength of the entering beam and formed of a metal. When a medium existing on the beam entrance side further than the entrance side multi-layered film layer is referred to as an entrance medium, the multiple dielectric films constituting the entrance side multi-layered film layer include at least one dielectric film having a higher refractive index than that of the entrance medium and at least one dielectric film having a lower refractive index than that of the entrance medium.10-04-2012
20100290008PROJECTOR - A projector includes: a solid-state light emitting element that emits light; a projection image forming unit that includes an effective area in order to form a projection image; and a reflecting member disposed between the solid-state light emitting element and the projection image forming unit, wherein: the reflecting member reflects part of the light emitted from the solid-state light emitting element and thus redirects the part of the light to travel back to the solid-state light emitting element, the part of the light not entering the effective area.11-18-2010
20100245772OPTICAL FILTER, PROJECTION DISPLAY, AND METHOD FOR MANUFACTURING OPTICAL FILTER - An optical filter capable of removing an unnecessary component of incident light. The optical filter has a transparent body of a flat plate-like shape. A plurality of filtering layers, each that separate an unnecessary polarization component of incident light from a necessary polarization component, are formed within the transparent body in series and at uniform intervals with an angle inclination relative to the travel direction of incident light. A plurality of light-absorptive layers are formed within the transparent body in series and at uniform intervals between the filtering layers to absorb an unnecessary component reflected by the filtering layers.09-30-2010
20100245771POLARIZATION CONVERSION ASSEMBLY AND SINGLE-IMAGER MICRO PROJECTION ENGINE - A single-imager micro projection engine includes a reflective polarization modulation imager, a projection lens system and a polarization conversion assembly integrating a light source with a planar polarization beam splitter and a reflective quarter wave composite plate in parallel. The polarization conversion assembly lets through first polarization portion of illumination light in first polarization state from the light source for illuminating a first half facing area on the reflective polarization modulation imager, while reflecting second portion in second polarization state perpendicular to first polarization state towards the reflective quarter wave composite plate. The reflective quarter wave composite plate reflects, while 90-degree polarization rotating from second polarization state to first, the received second portion back to the planar polarization beam splitter. The reflected and polarization-rotated second portion also in first polarization state transmits through the planar polarization beam splitter and illuminates a second half facing area on the reflective polarization modulation imager. Modulated and 90-degree polarization-rotated images produced by both the first and second half facing areas of the reflective polarization imager are reflected by the planar polarization beam splitter towards the projection lens towards an external projection screen.09-30-2010
20120127436ILLUMINATION MODULE AND PROJECTION APPARATUS - A projection apparatus including an illumination module, a display panel, and a projection lens module is provided. The illumination module includes a light source assembly including a light guide plate, a light source, a reflector, and a reflective polarizer, and a polarized beam splitter (PBS). The light guide plate has a light emitting surface, a bottom surface opposite to the light emitting surface, and a light incident surface connected between the light emitting surface and the bottom surface. The light source, the reflector, and the reflective polarizer are faced to the light incident surface, the bottom surface, and the light emitting surface respectively. The PBS is disposed beside the reflective polarizer away from the light guide plate. The display panel and the light source assembly are respectively located at two adjacent sides of the PBS. The projection lens module is disposed beside the PBS away from the display panel.05-24-2012
20120127435LIGHT SOURCE DEVICE AND IMAGE DISPLAY APPARATUS - A light source device includes a phosphor layer formed on a base, and an excitation light source exciting the phosphor. A dichroic mirror is arranged between the phosphor layer and the excitation light source and inclined with respect to a propagation direction of excitation light from the excitation light source. An incident region of the excitation light and an exiting region of fluorescence emitted from the phosphor belong to a space on the same side with respect to the surface with the phosphor layer disposed. In a dominant wavelength of the excitation light, the dichroic mirror has a spectral characteristic of transmitting 50% or more of light of a p-polarized component and reflecting 50% or more of light of a s-polarized component. Fluorescence emitted from the phosphor layer can be extracted highly efficiently and propagated by a compact and simple optical system.05-24-2012
20120162610ILLUMINATION OPTICAL SYSTEM AND IMAGE PROJECTION APPARATUS HAVING THE SAME - An illumination optical system includes a first compression system configured to compress a light flux on each of first and second sections, a second compression system configured to compress the light flux on the first section, a polarization converter arranged so that a section that contains a normal of the second polarization splitting surface and the optical axis becomes the second section, and configured to convert non-polarized light into linearly polarized light, a first lens array arranged in front of the polarization converter along an optical path, and a second lens array arranged between the first lens array and the polarization converter along the optical path. Both of the first lens array and the second lens array have no optical power on the second section.06-28-2012
20100208209OPTICAL APPARATUS AND PROJECTION TYPE IMAGE DISPLAY APPARATUS - An optical apparatus includes a frame, having optical components, mounted on a casing by means of an auxiliary member. The casing is provided with a groove in which the frame is inserted and a mount section to which a first part of the auxiliary member is fixed. The frame is provided with a frame-side positioning section engaged with a second part of the auxiliary member when the frame is inserted in the groove and then set at a predetermined angle of rotation. The auxiliary member is provided with the first part fixed to the mount section of the casing and the second part engaged with a frame-side positioning section. The first and the second part of the auxiliary member are formed in positions separate from each other while the second part is engaged with the frame-side positioning section under the elastic force of the auxiliary member.08-19-2010
20110181838PROJECTOR - A projector includes: a plurality of reflection-type light modulation device which modulate a plurality of color light fluxes according to image information; a plurality of reflection-type polarizing plate; a color combining device; a projection lens that projects the combined color light from the color combining device; and a light-transmissive member that transmits a color light flux incident thereon, wherein the light-transmissive member is disposed only in an optical path between a first reflection-type polarizing plate, which is one of the plurality of reflection-type polarizing plate, and the color combining device.07-28-2011
20120133896Projection-type Image Display Device - An image projecting unit of a projector includes a light source; a polarization control element which controls a polarization direction of light emitted from the light source; and a projecting unit which projects the image light that passed through the optical modulation element. The control unit detects a deterioration state of the polarization control element based on the projected image which is taken by an image-taking unit when a test image representing a single color throughout a screen is projected.05-31-2012
20120133895PROJECTOR - In addition to reflective light modulation devices, reflective polarization plates, a color combining optical device, and support bodies, a projector is provided with connection members fixed to the color combining optical device and for supporting the support bodies. Support positions of the support body by the connection members are disposed on the opposite side to the disposition position of the reflective light modulation device with respect to a plane including a polarization split surface of the reflective polarization plate.05-31-2012
20090059174LIQUID CRYSTAL DISPLAY APPARATUS AND LIQUID CRYSTAL PANEL - A light-shielding plate and a first light-shielding layer are arranged between a polarizing plate and a liquid crystal layer in a peripheral region of a liquid crystal panel so that linearly polarized light transmitted through the polarizing plate, which is a reflection polarizing plate, is not incident on the liquid crystal layer, but is reflected to the polarizing plate in the peripheral region.03-05-2009
20090059173Methods and systems for projecting images - Methods and systems for projecting images that may be implemented to provide the ability for a user of an information handling system to view a selected projected image privately, while allowing other projected images to be publicly viewable to other users who cannot see the privately-projected image. With appropriate intervening polarization, a user may be allowed to view the projected private image and any projected publicly viewable images, and the private image and publicly viewable images may be optionally simultaneously projected if so desired.03-05-2009
20120170000Projection Optical System and Image Projecting Device - A projection optical system (07-05-2012
20120075588SPECKLE REDUCTING DEVICE AND PROJECTOR - A speckle reducing device includes: a polarization splitter element with a polarization splitter portion that splits incident light into first and second light containing a first and a second component respectively, which outputs the first and the second light along different directions; a first reflecting member that reflects the first light to reenter the polarization splitter element; a first conversion member disposed between the first reflecting member and the polarization splitter element, which converts the first light to third light containing the second component; a second reflecting member that reflects the third light to reenter the polarization splitter element; and a second conversion member disposed between the second reflecting member and the polarization splitter element, which converts the third light to fourth light containing the first component, wherein: the polarization splitter element outputs the second and the fourth light along one direction.03-29-2012
20120314189LIGHT EMITTING ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTION DISPLAY DEVICE - The present invention includes light source layer (12-13-2012
20120314188OPTICAL ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTION DISPLAY DEVICE - Optical element 12-13-2012
20120257168POLARIZATION BEAM SPLITTING ELEMENT AND IMAGE PROJECTION APPARATUS - The polarization beam splitting element is configured to reflect or transmit an entering beam according to its polarization direction. The element includes, in order from a beam entrance side, a base member having a light transmissive property, a first one-dimensional grating structure formed of a dielectric material and having, in a first direction, a first grating period smaller than a wavelength of the entering beam, and a second one-dimensional grating structure formed of a metal and having, in a second direction orthogonal to the first direction, a second grating period smaller than the wavelength of the entering beam.10-11-2012
20120257169POLARIZATION BEAM SPLITTERS FOR IMAGE PROJECTION APPARATUS - A polarization beam splitter includes at least six prisms assembled together to form a single solid components. At least one diagonal interface is formed by a combination of two or more prism surfaces. The solid polarization beam splitter component has at least four light entrance/exit surfaces with at least one of the light entrance/exit surfaces including a step. At least one of the prisms has a non-triangular cross-sectional shape. At least one surface of a prism that forms a portion of the diagonal interface has a polarization beam splitting material disposed thereon resulting in a diagonal interface that includes a polarization beam splitting material. The polarization beam splitter can be incorporated into various image projection apparatus including 2D, multiple image, and 3D projection apparatuses.10-11-2012
20120081674LIGHT SOURCE APPARATUS AND PROJECTION DISPLAY APPARATUS - A light source apparatus includes: a light source; a reflection rotary body; an optical path changing element; and a polarization controller. The polarization controller controls polarization of the first color component light to a different polarization by means of transmission of the first color component light emitted from the light source and by means of transmission of the first color component light reflected by the reflection rotary body. The optical path changing element guides the first color component light reflected by the reflection rotary body, in a direction different from a direction of the first color component light emitted from the light source, in accordance with the polarization of the first color component light modulated by the polarization controller.04-05-2012
20120081673Image System - Provided is an electronic image display and control system comprising in various embodiments a microdisplay video projector that projects a high quality color image from a non-CRT image source onto a diffused but transmissive optical projection screen that is optically coupled with and viewable through a biocular adapted to this purpose. Systems are disclosed that are adapted to be mechanically coupled with a user to prevent relative movement between the biocular and the user, for instance in tactical applications. Closed-loop control electronics are provided for automatically controlling the brightness and chromaticity of the image.04-05-2012
20120081672LIGHT SOURCE APPARATUS AND PROJECTION DISPLAY APPARATUS - A light source apparatus includes: a light source that emits blue component light; a polarization adjuster that adjusts a polarization state of the blue component light emitted from the light source; a separation optical element that separates the blue component light emitted from the light source into a first optical path and a second optical path according to the polarization state adjusted by the polarization adjuster, the first optical path being for using the blue component light as excitation light, the second optical path being for using the blue component light as reference image light; a luminous body provided on the first optical path and that emits reference image light in response to the excitation light; and a combine optical element that combines the first optical path and the second optical path into a single optical path.04-05-2012
20120081671POLARIZATION CONVERSION ELEMENT, POLARIZATION CONVERSION UNIT, PROJECTION APPARATUS, AND METHOD FOR MANUFACTURING POLARIZATION CONVERSION ELEMENT - A polarization conversion element is equipped with an element main body having a light incident surface and a light emission surface that are generally in parallel with each other, and a phase difference plate bonded to the light emission surface of the element main body. The element main body includes a plurality of light-transmissive substrates that are sequentially bonded at a predetermined angle with respect to the light emission surface, polarization separating films and reflection films that are alternately provided between the plurality of light-transmissive substrates, and adhesive layers formed between the plurality of light-transmissive substrates, respectively. The adhesive layers are each formed from ultraviolet light curing adhesive to a thickness between 5 μm and 10 μm.04-05-2012
20090002635COLOR SEPARATION AND SYNTHESIS SYSTEMS, COLOR SEPARATION SYSTEMS AND COLOR SYNTHESIS SYSTEMS, ILLUMINATION OPTICAL SYSTEMS, PROJECTION OPTICAL SYSTEMS, AND PROJECTION DISPLAY DEVICES USING THESE SYSTEMS - Color separation and synthesis systems, color separation systems and color synthesis systems, illumination optical systems, projection optical systems, and projection display devices using these systems include a wavelength-splitting element that reflects linearly polarized light of one wavelength and transmits light of another wavelength; a polarization-transforming element that changes the direction of polarization of linearly polarized light of one wavelength and that is arranged adjacent and at least nearly parallel to the wavelength-splitting element; and a polarization-sensitive beam splitter that reflects light having one direction of linear polarization and transmits light with another linear polarization. These systems provide for dividing and combining three linearly polarized light beams of different wavelengths so that they provide imaging beams to and from display elements, such as LCOSs, that can produce a high quality full color image with fewer optical elements in the various systems and the projection display device.01-01-2009
20110122371OPTICAL PROJECTION SUBSYSTEM - A projection subsystem includes a light engine that provides a collection lens, a collimator and at least one solid state light emitter. A projection lens assembly receives the image and provides a projection beam having a luminous flux level. The projection subsystem has a portability efficacy.05-26-2011
20120262676LIGHT SOURCE DEVICE - In a light source device, in each division of an image frame, two or more of the color lights X, Y and Z (e.g., red, green and blue) can be projected simultaneously. Each of the color lights X, Y and Z is divided into two in terms of time so that synthesized light of one group of division color lights enters a first spatial modulation element. Synthesized light of another group of division color lights enters a second spatial modulation element, whereby gradation of each color light in each of the first and second spatial modulation elements is controlled.10-18-2012
20120262675LIGHT SOURCE DEVICE - In a light source device, that obtains high light usage efficiency by projecting simultaneously two or more of three primary color lights X, Y and Z. Moreover, each color light X, Y and Z is divided into two in terms of time so that p-wave and s-wave linear polarization lights are formed, such that the synthesized light of the p-wave linear polarization lights enters a first spatial modulation element and the synthesized light of the s-wave linear polarization lights enters a second spatial modulation element to permit gradation control of each color light.10-18-2012
20100231861IMAGE DISPLAY APPARATUS - An image display apparatus is provided with a laser light source, a spatial light modulation device for modulating the laser light emitted from the laser light source, a display surface for displaying the modulated light, an optical pixel aperture enlarging member for distributing the luminance of the laser light while introducing the laser light to apertures of pixels of the spatial light modulation device; and a display pixel aperture enlarging portion for optically enlarging the modulated light by the apertures of the pixels of the spatial light modulation device corresponding to pixels of an image to be displayed on the display surface. The luminance of a partial area of each pixel of the image displayed on the display surface is controlled to be below the threefold of an average value of the luminance in the area of the entire pixel by the optical pixel aperture enlarging member and the display pixel aperture enlarging portion, thereby accomplishing speckle noise reduction and an improvement of light utilization efficiency.09-16-2010
20110037951HEAD-MOUNTED PROJECTION DISPLAY USING REFLECTIVE MICRODISPLAYS - The present invention relates generally to a head-mounted projection display, and more particularly, but not exclusively to a polarized head-mounted projection display including a light engine and a compact, high-performance projection lens for use with reflective microdisplays.02-17-2011
20120268718POLARIZATION CONVERSION ELEMENT, POLARIZATION CONVERTING UNIT, AND PROJECTING APPARATUS - In a polarization conversion element including a plurality of light transmitting substrates and an optical element that includes polarization splitting films and reflective films that are alternately disposed between the light transmitting substrates, and a laminated wave plate that is arranged on the light outgoing face of the optical element and rotates the polarization plane of light emitted from the optical element by θ, a laminated wave plate is acquired by stacking a first wave plate of a phase difference Γ10-25-2012
20120320341OPTICAL APPARATUS, PROJECTION APPARATUS AND METHOD OF MANUFACTURING OPTICAL APPARATUS - There is provided an optical apparatus including a reflection panel unit including a reflection-type optical modulation element, a prism unit including a polarization optical apparatus for outputting a light beam modulated by the reflection-type optical modulation element and a color synthesis prism for receiving, synthesizing and outputting the light beams from the polarization optical apparatus, and a first fixing member for fixing the reflection panel unit to the prism unit, wherein the first fixing member includes a first surface and a second surface intersecting the first surface, and wherein the reflection panel unit and the prism unit include a third surface and a fourth surface to which the first surface and the second surface are adhered via adhesion layers, respectively.12-20-2012
20090002636COLOR SEPARATION AND SYNTHESIS SYSTEMS, COLOR SEPARATION SYSTEMS AND COLOR SYNTHESIS SYSTEMS, ILLUMINATION OPTICAL SYSTEMS, PROJECTION OPTICAL SYSTEMS, AND PROJECTION DISPLAY DEVICES USING THESE SYSTEMS - Color separation and synthesis systems, color separation systems and color synthesis systems, illumination optical systems, projection optical systems, and projection display devices using these systems include a wavelength-splitting element that reflects linearly polarized light of one wavelength and transmits light of another wavelength; a polarization-transforming element that changes the direction of polarization of linearly polarized light of one wavelength and that is arranged adjacent and at least nearly parallel to the wavelength-splitting element; and a polarization-sensitive beam splitter that reflects light having one direction of linear polarization and transmits light with another linear polarization. These systems provide for dividing and combining three linearly polarized light beams of different wavelengths so that they provide imaging beams to and from display elements, such as LCOSs, that can produce a high quality full color image with fewer optical elements in the various systems and the projection display device.01-01-2009
20110222022IMAGE DISPLAY DEVICE - An image display device which displays a three-dimensional image without alternately displaying right and left eye images, and utilizes substantially the same light for both two- and three-dimensional displays. The image display device includes: an LED light source having no polarization characteristics; a collimator lens collimating light from the LED light source; a condenser lens focusing the collimated light; a first polarizing prism separating the light transmitted by the condenser lens into S-polarized light and P-polarized light; a first polarized image former forming a P-polarized image from the S-polarized light reflected from the first polarizing prism; a second polarized image former forming an S-polarized image from the P-polarized light transmitted by the first polarizing prism; a second polarizing prism combining the P-polarized image and the S-polarized image; a projection lens projecting the combined image; and a screen.09-15-2011
20110234982PROJECTION DISPLAY - A projection type image display apparatus is provided which includes a housing to hold an optical system including multi-lenses, a polarized-light conversion element and a color separation portion. The housing operates to provide an optical path between a light source, located outside the housing, and penetration-type image display elements and an optical synthesizing portion also located outside of the housing.09-29-2011
20110304827PROJECTOR - A projector includes a liquid crystal light valve to which the image data is written in a line sequential manner, a polarization switching element for switching between the first and second polarization states throughout the switching areas in a line sequential manner, and a birefringent optical element for changing the light path of the incident light in accordance with the polarization state thereof. The boundary position between the switching areas of the first and second polarization states moves in sync with the boundary position between the first and second image data writing areas corresponding to the first and second sub-frame.12-15-2011
20110304826ILLUMINATING UNIT AND DISPLAY APPARATUS INCLUDING THE SAME - An illuminating unit and a display apparatus including the illuminating unit are provided. The illuminating unit generates and emits light to a display element of the display apparatus, and includes a light source; a uniformizing unit which uniformizes light from the light source and includes a plurality of uniformizing lenses arranged on an optical path; a condensing unit which condenses light from the uniformizing unit to emit the light to the display element and includes a plurality of condensing lenses sequentially arranged on the optical path, and the uniformizing unit and the condensing unit are arranged based on a width of one of a plurality of cell lenses forming the uniformizing lens and a width of an image displayed in the display element.12-15-2011
20080316431WAVELENGTH-SELECTIVE POLARIZATION CONVERSION ELEMENT, ILLUMINATION OPTICAL SYSTEM, AND IMAGE PROJECTION APPARATUS - The wavelength-selective polarization conversion element includes a plurality of polarization splitting surfaces each of which separates entering light into two polarized light components having polarization directions different from each other, a plurality of phase plates that causes a polarization direction of one polarized light component in the two polarized light components from the polarization splitting surfaces to coincide with a polarization direction of the other polarized light component. The element further includes a plurality of dichroic surfaces that is disposed closer to a light entrance side than the plurality of polarization splitting surfaces or between the plurality of polarization splitting surfaces and the plurality of phase plates, each dichroic surface separating entering light into two wavelength region components different from each other. The element is capable of generating light components having different polarization directions and different wavelength regions from non-polarized light while preventing a reduction of light use efficiency.12-25-2008
20120140183LIGHT SOURCE DEVICE AND PROJECTION DISPLAY APPARATUS - A light source device has: a light source unit including solid-state light sources emitting blue-color light and a condensing lens; a dichroic mirror polarization separating color light into first and second polarization components; a fluorescence emission plate excited with the first polarization component, emitting fluorescence of green and red components to enter the dichroic mirror; a first retardation plate converting the second polarization component to a circularly polarized light; and a reflection plate reflecting a light passed through the first retardation plate to reenter the same. The color lights from the fluorescence emission plate and the first retardation plate are combined at the dichroic mirror. A second retardation plate converts the polarization direction of the light from the light source unit, so as to control the ratio of p-polarization and s-polarization components. Lights from solid-state light sources are condensed efficiently and a high spectrum-utilization factor is obtained.06-07-2012
20130016322REFLECTIVE POLARIZING PLATE APPARATUS, ELECTRO-OPTIC APPARATUS, OPTICAL APPARATUS, AND PROJECTORAANM Wakabayashi; ShinichiAACI Suwa-shiAACO JPAAGP Wakabayashi; Shinichi Suwa-shi JPAANM Nakano; HirohisaAACI Matsumoto-shiAACO JPAAGP Nakano; Hirohisa Matsumoto-shi JPAANM Nagarekawa; SatoruAACI Matsumoto-shiAACO JPAAGP Nagarekawa; Satoru Matsumoto-shi JP - A reflective polarizing plate apparatus includes a reflective polarizing plate that transmits first linearly polarized light and reflects second linearly polarized light polarized in a direction substantially perpendicular to the direction in which the first linearly polarized light is polarized, a holding member that accommodates and holds the reflective polarizing plate, and a first biasing member that biases a glass surface of the reflective polarizing plate accommodated in the holding member.01-17-2013
20130016321Active Polarization Switch for Speckle Reduction in Laser Projection SourcesAANM Duelli; MarkusAACI SeattleAAST WAAACO USAAGP Duelli; Markus Seattle WA USAANM Freeman; Mark O.AACI SnohomishAAST WAAACO USAAGP Freeman; Mark O. Snohomish WA USAANM DeJong; Christian DeanAACI SammamishAAST WAAACO USAAGP DeJong; Christian Dean Sammamish WA USAANM Lescure; Alban N.AACI Les MureauxAACO FRAAGP Lescure; Alban N. Les Mureaux FR - A laser-based imaging system (01-17-2013
20120242959COLOR LIGHT MIXING METHOD, COLOR LIGHT MIXING DEVICE AND SMALL-SIZED PROJECTING SYSTEM HAVING SUCH COLOR LIGHT MIXING DEVICE - A color light mixing device, a color light mixing method and a small-sized projecting system using the color light mixing device are provided. The color light mixing device includes a tube structure, a plurality of light-emitting units, a reflective polarizer and a microlens assembly. The light-emitting units are located at an inlet end of the tube structure. The reflective polarizer is located at the other end of the tube structure. The microlens assembly is arranged between the light-emitting units and the reflective polarizer. By the color light mixing device, the light beams with a single polarization state are homogenized and outputted to a microdisplay element of the small-sized projecting system. By an optical projection lens assembly of the small-sized projecting system, an image shown on the microdisplay element is projected onto a screen.09-27-2012
20080252853COLOR-MIXING LASER MODULE AND PROJECTORS USING THE SAME - A color-mixing laser module is disclosed, which is comprised of a laser unit capable of emitting red, blue and green laser beams; a beam combiner, for receiving and converging the laser beams emitted from the laser unit and then directing the converged laser light to illuminate on a light pattern adjusting unit; and the light pattern adjusting unit, capable of receiving the converged laser light from the beam combiner for adjusting the pattern of the same.10-16-2008
20080225237PROJECTION DISPLAY DEVICE - An imager is shifted with respect to an optical axis of a refractive optical system. Thereby, a throw distance of a projector is shortened. A wavelength-selective half wavelength plate for rotating a polarization direction of green light beams is disposed between a dichroic prism and the refractive optical system in such a manner that the polarization direction of the green light beams is in parallel to the shifting direction. Thereby, the green light beams are incident onto the refractive optical system as P-polarized beams, whereby a transmittance of the green light beams in the refractive optical system is increased, while suppressing lowering of the light amount of the green light beams, and color non-uniformity resulting from lowering of the light amount of the green light beams.09-18-2008
20080225236Polarization conversion systems for stereoscopic projection - A polarization conversion system (PCS) is located in the output light path of a projector. The PCS may include a polarizing beam splitter, a polarization rotating element, a reflecting element, and a polarization switch. Typically, a projector outputs randomly-polarized light. This light is input to the PCS, in which the PCS separates p-polarized light and s-polarized light at the polarizing beam splitter. P-polarized light is directed toward the polarization switch on a first path. The s-polarized light is passed on a second path through the polarization rotating element (e.g., a half-wave plate), thereby transforming it to p-polarized light. A reflecting element directs the transformed polarized light (now p-polarized) along the second path toward the polarization switch. The first and second light paths are ultimately directed toward a projection screen to collectively form a brighter screen image in cinematic applications utilizing polarized light for three-dimensional viewing.09-18-2008
20110261325Optical device and projection device - An optical device includes multiple reflective spatial light modulation devices each of which applies an image signal to each of rays of incident light and rotates a polarization direction of each of the rays of incident light for a modulated output, multiple polarization elements each of which causes each polarization component of the rays of incident light in a specific direction to be transmitted and incident upon each of the spatial light modulation devices and reflects the polarization component in a direction rotated by each of the spatial light modulation devices, a light synthesis device which synthesizes multiple rays of reflected light to be output as one ray of image light, and a securing member which simultaneously secures each of the polarization elements in a position corresponding to each of the spatial light modulation devices. The securing member is secured to the light synthesis device.10-27-2011
20130176540LIGHT SOURCE MODULE AND PROJECTION APPARATUS - A light source module includes a light-emitting device, a wavelength conversion device and a polarization and color separation unit. The light-emitting device provides an excitation beam including a first portion beam having a first polarization direction. The wavelength conversion device includes a first wavelength conversion area and a polarization conversion area. When the first portion beam irradiates the first wavelength conversion area, the first portion beam is converted into a first color beam. When the first portion beam irradiates the polarization conversion area, the first polarization direction of the first portion beam is converted to a second polarization direction. The polarization and color separation unit is disposed between the wavelength conversion device and the light-emitting device, and transmits the first portion beam with the first polarization direction, and reflects the first portion beam with the second polarization direction and the first color beam to the same direction.07-11-2013
20080218698PROJECTION SYSTEM INCLUDING INTRINSIC POLARIZER - A projection system including an intrinsic polarizer is disclosed. The projection system includes a light source producing illumination light, an imager disposed to receive the illumination light, and a projection lens disposed to receive the illumination light from the imager. The imager includes an intrinsic polarizer. An intrinsic polarizer stack including a U.V. curable adhesive is also disclosed.09-11-2008
20080218697Polarization luminaire and projection display - A polarization luminaire is disclosed having a light source, a system of the optical integrator, a polarized light splitting device for splitting a light emitted from the light source into two kinds of polarized lights whose polarization directions are perpendicular to each other and whose traveling directions are apart from each other by an angle of less than 90 degrees, and a polarization conversion device for causing the two kinds of polarized lights to have the same polarization direction. The polarized light splitting device is placed on one of the entrance side and the outputting side of the first lens plate of the system of the optical integrator or is placed within the second lens plate. A prism beam splitter having a polarized light splitting film constituted by a thermally stable dielectric multi-layer film is suitable for the polarized light splitting device. Most of the polarized lights can be utilized by causing the polarized lights to have the same polarization direction. Further, the polarized lights, which have uniform brightness, can be emitted. Consequently, the polarization luminaire is suited to be a luminaire for use in a projection display that has liquid crystal light valves.09-11-2008
20130169937TILTED DICHROIC COLOR COMBINER I - The disclosure generally relates to color combiners, and in particular color combiners useful in small size format projectors such as pocket projectors. The disclosed color combiners include a tilted dichroic plate having at least two reflectors configured with light collection optics to combine at least two colors of light.07-04-2013
20130169936ILLUMINATION DEVICE, PROJECTION DEVICE, AND PROJECTION-TYPE IMAGE DISPLAY DEVICE - An illumination device includes: an optical element which including a hologram recording medium including a first zone and a second zone and can reproduce an image of a scattering plate; an irradiation device which irradiates the optical element with a coherent light beam such that the light beam is allowed to scan the hologram recording medium; and a polarization control unit provided on an optical path of the light beam to an illuminated zone. The light beams incident on respective positions of the hologram recording medium are allowed to reproduce the image superimposed on the illuminated zone. The polarization control unit controls polarization of the light beams such that the light beam incident on the first zone to travel toward the illuminated zone and the light beam incident on the second zone to travel toward the illuminated zone are configured with different polarization components.07-04-2013
20080198333POLARIZATION BEAM SPLITTER AND PROJECTION APPARATUS HAVING THE SAME - The present invention provides a polarization beam splitter including a multilayer film formed by laminating a first layer having a refractive index in a first range, a second layer having a refractive index in a second range which does not overlap the first range, and a third layer having a refractive index in a third range which does not overlap the first or second range in the order of the first layer, the second layer, the first layer, and the third layer in succession, wherein the transmittance of s-polarized light is 60% or more higher than the transmittance of p-polarized light in a first wavelength region, the transmittance of p-polarized light is equal to or higher than 70% in a second wavelength region different from the first wavelength region, and each of the first wavelength region and the second wavelength region has a bandwidth equal to or larger than 30 nm.08-21-2008
20130148084POLARIZATION CONVERSION DEVICE AND PROJECTOR SYSTEM - An external polarization conversion device used for a projector includes a first element which converts light from the projector to polarized light in a uniform polarization direction, and a second element which is arranged in a position subsequent to the first element in such a way that there is a space between the first element and the second element and which converts the polarized light from the first element to predetermined polarized light that is different from the polarized light from the first element.06-13-2013
20110279779ETENDUE MAINTAINING POLARIZATION SWITCHING SYSTEM AND RELATED METHODS - Etendue maintaining polarization switching occurs, according to various embodiments, with a mirror that quickly transitions between two positions. Light having uniform polarization is transmitted to the mirror. Light reflected off of the mirror in one of the two positions has its polarization changed, whereas light reflected off of the mirror in the other of the two positions has its polarization maintained. Thereafter, the polarization-changed light and the polarization-maintained light easily may be recombined in an entendue-maintaining manner. Because the recombined light includes two different polarization states, stereoscopic images may be generated.11-17-2011
20080297728Color Projector with a Compact Optical Integrator and Method of Projecting an Image Using the Same - In the color projector (12-04-2008
20130120714Image Display Device - To prevent effectively the flickering of an image due to the switching of a polarization direction while reducing speckle noise. A polarization switching unit is provided in an optical path of laser light to a projection surface A and periodically switches a polarization direction of the laser light emitted therefrom between p and S polarization. A laser control unit controls laser light sources in synchronization with the switching by the polarization switching unit and determines a driving current corresponding to a grayscale to be displayed on the basis of driving current characteristics for P polarization when the polarization direction of the laser light is the P polarization. In addition, the laser control unit determines the driving current corresponding to the grayscale to be displayed on the basis of the driving current characteristics for P polarization when the polarization direction of the laser light is the S polarization.05-16-2013
20110310352PROJECTOR - A projector includes: a light source device which emits an illumination light; an aperture disposed with a tilt with respect to a plane perpendicular to a center axis of the illumination light, provided with an opening section which transmits a part of the illumination light, and block a rest of the illumination light; a pair of first and second lens arrays which divides the illumination light from the light source device into a plurality of partial light; and an overlapping lens which overlaps the illumination light transmitted through the first and second lens arrays, wherein the aperture is disposed on a light path between the light source device and the overlapping lens.12-22-2011
20110310351PROJECTOR - A projector includes: a reflection type polarization plate; a reflection type light modulation device; a light transmissive component; a support body; an optical compensation element disposed within the support body; and a control member which supports the optical compensation element, wherein any one of the first side surface, the second side surface, and the third side surface has a concave portion concaved toward the inside of the support body to accommodate the control member, the control member has an operation section which controls the position of the optical compensation element around a predetermined axis, and an operation notch through which the operation section projects to the outside of the support body is formed on the side wall of the concave portion.12-22-2011
20110310350IMAGE PROJECTION APPARATUS AND COLOR SEPARATION/COMBINATION OPTICAL SYSTEM - To obtain a brighter projection image, an image projection apparatus guides unnecessary light in a specific light path and analyzes this unnecessary light with a polarizing plate.12-22-2011
20110310349LIGHT SOURCE DEVICE AND PROJECTOR - A light source device which can prevent deterioration of a polarization rotation element and an adhesive for bonding the polarization rotation element is to be provided. A light source device includes a polarization separation element obtaining first polarization and second polarization by separation and a polarization rotation element converting a polarization component aligned in a second polarization direction into a polarization component aligned in a first polarization direction.12-22-2011
20120019783PROJECTION TYPE IMAGE DISPLAY APPARATUS AND CONTROL METHOD THEREFOR - There is provided a projection-type image display apparatus which is capable of solving the problem in which the reduction ratio of speckles is small. Light source 01-26-2012
20120019782PROJECTION DISPLAY DEVICE - In a projection display device, a polarization converting element is provided between an imager and a refracting optical system for converting a polarization direction of light after modulation into a direction radially extending from the center of the optical axis of the refracting optical system. Light transmitted through the polarization converting element is incident onto the refracting optical system in a state of P-polarized light or a state close to the state of P-polarized light. Thereby, the transmittance of light through the refracting optical system is made substantially uniform and increased.01-26-2012
20130194549PROJECTION DISPLAY APPARATUS - A first lens array splits light flux emitted from a light source. A second lens array is provided with a plurality of lens cells two-dimensionally arranged, on which light emitted from the first lens array is irradiated. A polarization converting element splits indefinite polarized light emitted from the second lens array into P polarized light and S polarized light, and conforms the split light to either the P polarized light or the S polarized light and emits the conformed light. A drive mechanism displaces the polarization converting element in a direction perpendicular to a polarization split direction along a surface on which the indefinite polarized light from the polarization converting element is incident.08-01-2013
20120075589POLARIZED LIGHT SOURCE AND POLARIZATION CONVERTING METHOD AND DEVICE THEREOF - A polarized light source comprises a light emitting source and a polarization conversion device. The polarization conversion device comprises a fixing device (03-29-2012

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