Class / Patent application number | Description | Number of patent applications / Date published |
353008000 | Polarizer | 89 |
20080266525 | Autostereoscopic projection system - The invention relates to an autostereoscopic projection arrangement, comprising at least one projector ( | 10-30-2008 |
20080304013 | Projection Type Stereoscopic Display Apparatus - Provided is a projection type stereoscopic display apparatus that can separately display far images and near images. The projection type stereoscopic display apparatus includes: a projector projecting a near image with first polarized light and a far image with second polarized light, which is different from the first polarized light of the near image, in a direction in which a viewer observes the near and far images; a front screen facing the projector, and allowing the near image with the first polarized light to be formed thereon and the far image with the second polarized light to be transmitted therethrough; and a rear screen spaced a predetermined distance apart from a rear surface of the front screen, and allowing the far image with the second polarized light transmitted through the front screen to be formed thereon, wherein the viewer positioned in front of the screen can simultaneously see the near image and the far image respectively formed on the front screen and the rear screen. | 12-11-2008 |
20090051878 | STEREO PROJECTION OPTICAL SYSTEM - A stereo projection optical system, includes a first polarizing beam splitter configured for separating a light input into a first polarized light component and a second polarized light component; a first image assimilator positioned to receive the first polarized light component; a first image assimilator positioned to receive the second polarized light component; a fourth polarizing beam splitter positioned to receive the light outputs of the first, second image assimilators. The first, second image assimilators to project two images formed by the first polarized light component and the second polarized light component with spatial information in the stereo projection optical systems. When viewers wear glasses that have two polarizing lenses whose polarization directions are perpendicular to each other, the viewers can perceive projected images as three-dimension. | 02-26-2009 |
20090059172 | STEREO PROJECTION OPTICAL SYSTEM - A stereo projection optical system includes a first polarizing beam splitter, a transmission-type light modulator positioned to receive the first polarized light component from the first polarizing light splitter and an image assimilator positioned to receive an emergent light of the transmission-type light modulator. The image assimilator includes a second polarized light splitter and first, second reflective spatial light modulators. The stereo projection optical systems provide viewers three-dimensional images formed by two alternative polarization light beams whose polarizations are perpendicular to each other utilizing the transmission-type light modulators to form “3-D” images. | 03-05-2009 |
20090079941 | THREE-DIMENSIONAL IMAGE PROJECTION SYSTEM AND METHOD - An image projection system having an optical projector and a method for projecting an image. The image projection system enables viewing the images in three dimensions and securely viewing the images in a public forum. The image projection system may include a portable, handheld optical projector that is spaced apart from a display screen and that redirects an image signal to the display screen. The image signal is scattered by the display screen and transmitted to a viewer's eyes through a set of eyewear worn by the viewer. The display screen preserves the polarization state of the image signal. The portable handheld optical projector may be a cellular phone, a personal digital assistant, a portable computer, or the like that includes one or more sets of light emission systems capable of projecting the image signal. The optical projector may be portable and handheld, or stationary or semi-stationary. | 03-26-2009 |
20090091709 | STEREO PROJECTION OPTICAL SYSTEM - A stereo projection optical system includes a polarizing beam splitter configured for splitting a light input into first, second polarized light components, first, second digital micro-mirror device respectively positioned to receive the first, second polarized light component and configured for superimposing spatial information on the first, second polarized light component, first, second total internal reflection prism configured for coupling the first, second polarized light component into the first, second digital micro-mirror device and a light combiner. The projecting lens projects two images formed by the first polarized light component and the second polarized light component with spatial information in the stereo projection optical systems. When a viewer wear glasses that have two polarizing lenses whose polarization direction is perpendicular to each other, the viewer can perceive projected images as being “3-D”. | 04-09-2009 |
20090096990 | STEREO PROJECTION OPTICAL SYSTEM - A stereo projection optical system includes a polarizing beam splitter, a 2-way wheel, a digital micro-mirror device, and a total internal reflection prism. The polarizing beam splitter is configured for emitting two light outputs. The 2-way wheel includes a reflective region and a transmissive region. The reflective region is configured for reflecting the light outputs and the transmissive region is configured for transmitting the light outputs. The digital micro-mirror device is configured for superimposing spatial information on the light outputs. The total internal reflection prism configured for coupling the light outputs of the 2-way wheel into the digital micro-mirror device and transmitting a light output of the digital micro-mirror device. The stereo projection optical systems provide viewers three-dimensional images formed by two alternative polarized light beams whose polarizations are perpendicular to each other utilizing the 2-way wheel. | 04-16-2009 |
20090096991 | STEREO PROJECTION OPTICAL SYSTEM - A stereo projection optical system includes a polarization converter, a 2-way wheel, a retarder, and an image engine. The polarization converter is configured for converting an incident light into a polarized light which have single polarization. The 2-way wheel includes a reflective region and a transmissive region. The reflective region is configured for reflecting the polarized light and the transmissive region is configured for transmitting the polarized light. The retarder is positioned to receive an emergent light from one of the reflective region and the transmissive region. The image engine is positioned to receive light output of the 2-way wheel and the retarder and configured for emitting the light output comprising spatial information. The stereo projection optical systems provide viewers three-dimensional images formed by two alternative polarized light beams whose polarizations are perpendicular to each other utilizing the 2-way wheel. | 04-16-2009 |
20090103051 | STEREO PROJECTION OPTICAL SYSTEM - A stereo projection optical system includes an image assimilator and a transmission-type light modulator positioned to receive the emergent light of the image assimilator. The image assimilator is configured for superimposing spatial information on the incident light beam and emitting one of a first polarized light component and a second polarized light component. The transmission-type light modulator alternates between a dark state and a bright state. The stereo projection optical systems provide viewers three-dimensional images formed by two alternative polarized lights whose polarizations are perpendicular relative to each other utilizing the transmission-type light modulators. | 04-23-2009 |
20090185138 | PROJECT-TYPE THREE-DIMENSIONAL IMAGE REPRODUCING APPARATUS - The present invention provides a projection-type three-dimensional image reproducing apparatus that enables stable provision of a three-dimensional image display by preventing occurrence of crosstalk between adjacent lenses or adjacent hologram optical elements and eliminating shift of a three-dimensional image when a steroscopic image is reproduced by use of a lenticular lens array, a fly-eye lens array, or a hologram optical element. The three-dimension image reproduce apparatus includes an array of adjoining optical elements, which is an array of lenticular lens, a fly-eye lens array or an array of hologram optical elements, and a cross-talk prevent part preventing cross-talk between the adjoining optical elements. | 07-23-2009 |
20090213330 | STEREO PROJECTION USING POLARIZED SOLID STATE LIGHT SOURCES - A stereoscopic digital image projector includes (a) a plurality of light modulation assemblies, each comprising: (i) at least one solid-state light source energizable to provide illumination having a first polarization axis; (ii) a polarization rotator disposed in the path of the polarized illumination from the solid-state light source(s) and actuable to controllably rotate the polarization axis from the solid-state light source(s) to a second polarized axis; (iii) a micro-electromechanical spatial light modulator in the path of the polarized illumination and energizable to modulate the polarized illumination to form a first modulated light from illumination of the first polarization state and to form a second modulated light from illumination of the second polarization state; and (b) a synchronizing means to temporally control the polarization rotation to match the appropriate image data on the spatial light modulator; and (c) projection optics for directing the first and second modulated light toward a display surface. | 08-27-2009 |
20090284713 | UNIFORM SPECKLE REDUCED LASER PROJECTION USING SPATIAL AND TEMPORAL MIXING - A digital image projector includes a light assembly configured to project light along a light path from at least one laser array light source, the projected light having an overlapping far field illumination in a far field illumination portion of the light path; a temporally varying optical phase shifting device configured to be in the light path; an optical integrator configured to be in the light path; a spatial light modulator located downstream of the temporally varying optical phase shifting device and the optical integrator in the light path, the spatial light modulator configured to be located in the far field illumination portion of the light path; and projection optics located downstream of the spatial light modulator in the light path, the projection optics configured to direct substantially speckle free light from the spatial light modulator toward a display surface. | 11-19-2009 |
20100007852 | LASER ILLUMINATED MICRO-MIRROR PROJECTOR - A digital image projector includes a plurality of light modulation assemblies and a dichroic combiner. Each light modulation assembly includes at least one laser light source configured to provide an illumination beam, an optional a coated surface, and a spatial light modulator. If the coated surface is present, the respective laser light source is configured to direct the illumination beam to the coated surface, which directs the illumination beam toward the respective spatial light modulator. Otherwise, the respective laser light source is configured to direct the illumination beam directly toward the respective spatial light modulator. The spatial light modulator redirects output modulated light back to the coated surface, if present, and out of the corresponding light modulation assembly. The dichroic combiner directs the output modulated light from each of the plurality of light modulation assemblies toward a projection lens for projection onto a display surface. | 01-14-2010 |
20100026959 | 2D/3D PROJECTOR WITH ROTATING TRANSLUCENT CYLINDER FOR ALTERNATING LIGHT POLARISATION - A 3D image projector having a translucent rotatable hollow cylinder, the hollow cylinder having differently polarized sections, and the projector being capable of passing a light beam generally orthogonally through a wall of the hollow cylinder is disclosed. | 02-04-2010 |
20100033680 | AUTOSTEREOSCOPIC DISPLAY DEVICE AND A SYSTEM USING THE SAME - An autostereoscopic display device comprises a reflection layer for reflecting at least a portion of incident light, a polarization conversion layer arranged over the reflection layer, and an array of lenticular elements arranged over at least a portion of the polarization conversion layer and including a birefringent material. Light having a first state of polarization is arranged to pass through the lenticular element array without substantial lenticular element focusing, wherein the polarization state is transformed by the polarization conversion layer such that the reflected light has a second state of polarization arranged to pass through the lenticular element array with lenticular element focusing to provide multiple views. | 02-11-2010 |
20100079728 | STEREOSCOPIC IMAGE PROJECTING SYSTEM USING CIRCULARLY POLARIZED FILTER MODULE - A stereoscopic image projection system using a circular polarization filter module is provided. Even though this system uses a single projector, it allows left and right images to have different polarization directions using the circular polarization filter module, thereby reducing crosstalk compared to an LCD-shutter-based system. | 04-01-2010 |
20100110383 | OPTICAL PROJECTION ENGINE DEVICE - An optical projection engine device uses a symmetrical wire grid polarizing beam splitter (PBS) that splits incident illumination to a symmetrical pair of polarized light beams in two orthogonal polarization states, one by reflection and the other by transmission, for illuminating a pair of reflective modulation imagers respectively. In identical geometric configuration, the two synchronized reflective modulation imagers polarization modulate polarized light beams as received, and reflect them back towards the PBS, which through transmission and reflection respectively, combines and projects two modulated light beams through a projection lens system to form a pair of spatially overlapped illumination images of aligned pixels with the same image in two orthogonal polarization states on a projection screen. The device jointly provides improvement optical efficiency and expanded function to three dimensional stereoscopic displays. | 05-06-2010 |
20100296059 | Polarization modulation wheel - A polarization switch provides substantially ideal binary polarization switching over a broad range of wavelengths using a polarization modulation wheel having at least one retarder stack that transforms polarization. Using the polarization modulation wheel in a polarization system provides a high throughput polarization switch and operates over a wide range of incidence angles while providing substantially continuous and smooth polarization output for each component for any selected polarization basis set. The polarization modulation wheel is well-suited for stereoscopic polarized projection applications. | 11-25-2010 |
20100315595 | DYNAMIC ILLUMINATION CONTROL FOR LASER PROJECTION DISPLAY - A display apparatus ( | 12-16-2010 |
20100328612 | System and method for three-dimensional (3D) projection - A system and method for use in projecting stereoscopic images for three-dimensional presentation are disclosed. The system includes a dual-lens configuration for imparting different circular polarizations to two sets of images such that one set of images has a polarization orientation orthogonal to that of the other set of images. The dual-lens system includes at least one component for enhancing heat transfer among various elements in the system. | 12-30-2010 |
20100328613 | PROJECTION SCREENS FOR THREE DIMENSIONAL IMAGES - Projection screens for projection of binocular stereoscopic images include a metallic projection surface that includes a plurality of depressions configured to produce left and right viewable light fluxes in response to received left and right modulated light fluxes. The metallic projection surface can be formed by beadblasting, and multiple panels can be secured together by welding or other process. Projection surfaces can also be formed by molding or otherwise forming a conductive surface on a dielectric or other substrate. | 12-30-2010 |
20110007279 | ETENDUE REDUCED STEREO PROJECTION USING SEGMENTED DISK - A stereoscopic digital image projecting system has a light source system energizable to provide polarized illumination having a first polarization state and a beam splitting system alternately generating first and second light beams having different polarization states from the polarized illumination. A combining system has a polarization beam combiner that combines the first and second light beams into a combined light beam. A spatial light modulator is used to modulate the combined light beam in a manner consistent with stereoscopic image data to form a first modulated image from illumination in the combined light beam having the first polarization state and to form a second modulated image from illumination in the combined light beam having the second polarization state. Projection optics are configured to project the first and second modulated images onto a display surface. | 01-13-2011 |
20110013144 | STEREOSCOPIC PROJECTOR WITH ROTATING SEGMENTED DISK - A stereoscopic digital image projecting system has a light source system providing polarized illumination having a first polarization state and a beam splitting system with a rotating segmented disk in the illumination, alternately generating first and second light beams, the rotating segmented disk having outer segments alternately transmissive and non-transmissive and inner segments radially aligned with the outer segments and alternately reflective and transmissive. A polarization rotator in a path of either the first or second light beam rotates the first polarization state to a second state orthogonal to the first. A combining system combines the first and second light beams into a combined light beam. A spatial light modulator modulates the combined light beam in a manner consistent with stereoscopic image data to form first and second modulated images having substantially orthogonal polarization states. Projection optics project the modulated images onto a display surface. | 01-20-2011 |
20110019153 | IMAGE PROJECTOR - Image projector can include a first optical system for producing a first image polarized into a first polarized light, a second optical system for producing a second image polarized into a second polarized light, a polarized light splitting device for reflecting one of the first polarized light and the second polarized light and transmitting the other one such that the first image and the second image travel on the same optical path, and a projecting lens for enlarging and projecting the first and second images from the polarized light splitting device. | 01-27-2011 |
20110032483 | MULTI-SEGMENT OPTICAL RETARDER FOR CREATING 3D IMAGES - A multi-segment optical retarder that can be used with or within a single projector for creating 3D images. The multi-segment optical retarder is coupled to an actuator used to effect some predetermined linear, rotary, or oscillating movement of the multi-segment optical retarder such that a fast axis orientation of each segment is substantially constant relative to itself over time and for a given area of incidence. | 02-10-2011 |
20110051092 | OPTICAL ELEMENT, OPTICAL UNIT, AND PROJECTION DISPLAY APPARATUS FOR SWITCHING POLARIZATION DIRECTION - Each of a first polarization separation element and a second polarization separation element reflects one of two polarization components perpendicular to each other included in incident light and transmits the other polarization component. A switching element is placed between the first polarization separation element and second polarization separation element and switches between a first state of transmitting an incident polarization component as it is and a second state of converting an incident polarization component to the other polarization component perpendicular to the incident polarization component and transmitting the converted component. | 03-03-2011 |
20110063576 | Method and system for three-dimensional (3D) projection - A method and system are described for projecting stereoscopic images using circularly polarized light with at least one polarizer for limiting the amount of light or radiant energy reaching a projection lens system and associated optical elements, and system configurations are discussed with respect to desired performance characteristics. | 03-17-2011 |
20110096295 | Combining P and S rays for bright stereoscopic projection - A multiple path stereoscopic projection system is disclosed. The system comprises a polarizing splitting element configured to receive image light energy and split the image light energy received into a primary path and a secondary path, a reflector in the secondary path, and a polarization modulator or polarization modulator arrangement positioned in the primary path and configured to modulate the primary path of light energy. A polarization modulator may be included within the secondary path, a retarder may be used, and optional devices that may be successfully employed in the system include elements to substantially optically superimpose light energy transmission between paths and cleanup polarizers. The projection system can enhance the brightness of stereoscopic images perceived by a viewer. Static polarizer dual projection implementations free of polarization modulators are also provided. | 04-28-2011 |
20110128503 | STEREOSCOPIC IMAGE PROJECTOR - A stereoscopic image projector is provided with a display device, a characteristic-differentiation member, an optical-path separation member, an optical-path combining member, and a single projection lens. The display device displays a left-eye image which is a left parallax image and a right-eye image which is a right parallax image on different regions of an image display surface. The characteristic-differentiation member gives projection light beams each carrying a different one of images displayed on the display device optical characteristics that are different from each other. By using the difference in optical characteristic, the optical-path separation member separates optical paths of the left-eye and right-eye images from each other, and the optical-path combining member coaxially combines the separated optical paths together. The projection lens, by using the combined projection light beams, superimposingly projects, onto a screen, the right-eye and left-eye images having the optical characteristics that are different from each other. | 06-02-2011 |
20110176114 | Wide field-of-view stereoscopic projection system - Disclosed embodiments relate to a stereoscopic projection system and methods. An exemplary disclosed projection system includes an optical component disposed between the lenses of a lens arrangement. An exemplary lens arrangement includes a first power group, a second power group, and an aperture stop. In an embodiment, the optical component is disposed between the first power group and the aperture stop. In an exemplary embodiment, the optical component is proximate to the aperture stop. By disposing the optical component closer to or proximate to the aperture stop in the lens arrangement, various benefits may be realized, including improved contrast uniformity. | 07-21-2011 |
20110205495 | Waveplate compensation in projection polarization conversion system - Three dimensional projection systems may be single projector or multiple projector systems. These 3D projection systems may include a polarization conversion system (PCS). The PCS may be designed for relatively small throw ratios and thus, may be designed to accommodate the small throw ratios. The PCS may include a polarizing beam splitter, a first optical stack, a reflector and a second quarter wave retarder. The first optical stack may include a rotator, a polarizer, a polarization switch and a first quarter wave retarder. The PCS may receive light from a projector and the PBS may direct the light toward the first optical stack. The light may be converted to a different polarization state as it passes through the first optical stack. The converted light may then be re-directed by a reflecting element to the second quarter wave retarder. The second quarter wave retarder may convert linearly polarized light to circularly polarized light. | 08-25-2011 |
20110205496 | Polarization 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. | 08-25-2011 |
20110242490 | PROJECTOR - A projector includes a liquid crystal light valve to which first image data and second image data are alternately written and a polarization switching device that has a plurality of switching areas and switches a polarization state between a first polarization state and a second polarization state for each of the switching areas. A boundary position between a switching area that provides the first polarization state and a switching area that provides the second polarization state moves in synchronization with a boundary position between an area where the first image data is written and an area where the second image data is written. | 10-06-2011 |
20110285963 | LOW THERMAL STRESS BIREFRINGENCE IMAGING SYSTEM - An imaging system having reduced susceptibility to thermally induced stress birefringence, comprising; a relay lens, which images the object plane onto an intermediate image plane; a projection lens, which images the intermediate image plane onto the display surface. The lens elements that are immediately adjacent to a relay lens aperture stop and a projection lens aperture stop are fabricated using glasses having a negligible susceptibility to thermal stress birefringence, and the other lens elements are fabricated using glasses having at most a moderate susceptibility to thermal stress birefringence as characterized by the thermal stress birefringence metric. | 11-24-2011 |
20110310348 | 3D PROJECTOR - A viewing system for viewing video displays having the appearance of a three dimensional image. | 12-22-2011 |
20110317129 | PROJECTION AUTOSTEREOSCOPIC DISPLAY AND STEREO SCREEN - A projection autostereoscopic display including an image projector and a stereo screen is provided. The image projector projects an image. The image includes multiple viewing-zone images. The stereo screen receives the image and reflects the image to an observing direction. The stereo screen includes a linear polarizer layer, for receiving and polarizing the image. A first microretarder layer is disposed behind the linear polarizer layer. A second microretarder layer is disposed behind the first microretarder layer by a distance. A reflection-type polarization-reserved diffuser layer is disposed behind the second microretarder layer for reflecting and diffusing the image into various directions while maintaining the polarization state of the image. A switching layer is switched between a transparent state which maintains the polarization state of the image and an opaque state which changes the polarization states of the image to a non-polarization state, to switch between 2D and 3D display modes. | 12-29-2011 |
20120033184 | STEREOSCOPIC VISION GLASSES AND STEREOSCOPIC VISION ELECTRONIC APPARATUS - Stereoscopic vision glasses include a right-eye shutter and a left-eye shutter axisymmetric to each other with respect to a symmetric axis. Each of the right-eye shutter and the left-eye shutter includes an incident side polarization plate, an exit side polarization plate, and liquid crystal interposed therebetween. Each of the right-eye shutter and the left-eye shutter is opened or closed in accordance with an application voltage of the liquid crystal. The polarization axis of the incident side polarization plate of each of the right-eye shutter and the left-eye shutter is inclined with respect to the symmetric axis. A stereoscopic vision electronic apparatus includes a projection type display device displaying a right-eye image and a left-eye image in a time division manner by projecting first projected light and second projected light of which directions of polarization axes are different from each other; and the stereoscopic vision glasses. | 02-09-2012 |
20120044459 | Three-Dimensional Projection Device - An image projection system having a laser projector that projects two differently polarized images on a display region is disclosed. The laser projector enables viewing the two differently polarized images as a three-dimensional image. The image projection system includes a planar lightwave circuit-based beam combiner that enables multiple colors of laser light having different polarization modes to be combined in a single output beam that is scanned over the display region at video rates to produce the two polarized images. | 02-23-2012 |
20120057133 | THREE DIMENSIONAL (3-D) POLARIZED DISPLAYS - A display system includes a driver configured to create command signals for generating a pair of images along two different optical paths; a pair of polarized sources, each polarized source configured to produce a polarized image of one of the pair of images along a respective optical path at substantially the same time based on a command signal from the driver, the first of the pair of polarizer sources configured to produce a different polarization than the second of the pair of polarizer sources; a polarization co-alignment element configured to optically align the polarized images from the respective polarizer along a common optical path; and a display screen configured to display the co-aligned polarized images. Depending on the mode of the display system, 3-D polarized glasses may be worn by the viewers for observing the displayed images. | 03-08-2012 |
20120057134 | POLARIZATION CONVERSION SYSTEM AND STEREOSCOPIC PROJECTION SYSTEM EMPLOYING SAME - A stereoscopic projection system includes an optical engine, a relay lens group, a polarization conversion system and two identical projection lenses. The optical engine is used for outputting a non-polarized image light. The non-polarized image light is imaged into the polarization conversion system through the relay lens group to produce an intermediate image. The polarization conversion system includes a polarization beam splitter, a polarization rotating element and a polarization switch. The polarization beam splitter is used for splitting the non-polarized image light into a first-state first polarized beam and a second-state second polarized beam, which have the same total optical length. By the polarization switch, the first output polarized beam and the second output polarized beam are alternately switched between the first state and the second state. The projection lenses are located in the first optical path and the second optical path for projecting the intermediate image. | 03-08-2012 |
20120133893 | 3D IMAGE CONVERTIBLE PROJECTION OPTICAL SYSTEM - A 3D image convertible projection system for viewing a 3D broadcasting and 3D DVD image, using a general projector that receives a left-eye image and a right-eye image for a 3D image in one frame and projects them toward a projection lens, wherein the left-eye image and the right-eye image in 2D form are magnified so that a vertical magnification rate is 0 and a horizontal magnification rate is 1.5-2.5 times. At the same time the left and right images are divided leftward and rightward through an optical system consisting of first and second curved surface mirrors, and then the images are secondly reflected and magnified to be projected toward a screen. The 3D image can then be viewed using polarization eyeglasses through image division, image horizontal magnification rate, and overlapping projection on a polarization separation screen. | 05-31-2012 |
20130038837 | Mixed Polarization Imaging System for Three-Dimensional Projection and Corresponding Methods - An imaging system ( | 02-14-2013 |
20130088688 | SPATIALLY MODIFYING POLARIZATION STATE OF LIGHT - Systems and methods configured for outputting light having a polarization state distribution that is spatially uniform by applying a correction to, for example, a beam of light with a spatially uniform polarization state distribution that has been altered (unintentionally or otherwise) to become spatially non-uniform are described. A projection system can include an optical element and a polarization-altering device (PAD). The optical element can cause a polarization of light in the projection system to be spatially non-uniform. The PAD can change the polarization state distribution of the light spatially based on an amount of spatial non-uniformity on the light caused by the optical element and before the light enters the optical element. The projection system can output the light having a spatially uniform polarization state distribution. | 04-11-2013 |
20130100414 | Waveplate compensation in projection polarization conversion systems - Three dimensional projection systems may be single projector or multiple projector systems. These 3D projection systems may include a one or more polarization conversion systems (PCS). Each PCS may be designed for relatively small throw ratios and thus, may be designed to accommodate the small throw ratios. Each PCS may include a polarizing beam splitter, a first optical stack, a reflector and a second quarter wave retarder. The first optical stack may include a rotator, a polarizer, a polarization switch and a first quarter wave retarder. Each PCS may receive light from a respective projector, and the PBS in each PCS may direct the light toward the first optical stacks. The light may be converted to a different polarization state as it passes through the first optical stack. The converted light may then be re-directed by a reflecting element to a second quarter wave retarder. The second quarter wave retarder may convert linearly polarized light to circularly polarized light. | 04-25-2013 |
20130107218 | System for stereoscopic cinema projection | 05-02-2013 |
20130135588 | 3D display apparatus - A 3D display is provided comprising at least one light source, a Switchable Bragg Grating device, a microdisplay and a projection lens system. In one embodiment of the invention the SBG device converts the source light into colour sequential illumination and, and provides sequential orthogonally polarized illumination of the microdisplay for each colour. In one embodiment of the invention the first SBG device converts the source light into colour sequential illumination and, and provides sequential first and second sense circularly polarized illumination. The microdisplay is updated with alternating left and right eye perspective images for stereoscopic viewing. | 05-30-2013 |
20130135589 | Laser beam scanned display apparatus and method thereof - Generally, near seamless electronics displays may be employed in cinema and exhibition applications. Laser scanned displays may be enabled such that the display may display three dimensional (“3D”) content. A first method to enable a laser scanned display for 3D content may employ polarization, with or without polarization conversion and another method may employ multiple colors. Additionally, the envelope function that may be employed across the display may be achieved by changing laser power as a beam is scanned on the screen or by changing the dwell time of the laser beam on the pixels. One method of minimizing the effects of seams in the screen may be to reduce the screen resolution near the seams by screen design and/or laser beam dwell time or illumination energy. | 05-30-2013 |
20130155378 | STEREOSCOPIC DISPLAY APPARATUS - A stereoscopic display apparatus includes an image projection module, a plurality of projection lenses and an optical path switching module. The optical path switching module is disposed between the image projection module and the projection lenses. The optical path switching module has a light-incident surface and different light-emitting surfaces. An image signal generated by the image projection module enters the optical path switching module through the light-incident surface. The optical path switching module includes a plurality of polarization beam splitters and a polarization adjusting module. The polarization adjusting module is disposed between the polarization beam splitters. The optical path switching module is used for switching the polarization adjusting module time-sequentially for guiding the image signal to those different light-emitting surfaces respectively, and accordingly a plurality of image formation beams are formed from the light-emitting surfaces though the projection lenses. | 06-20-2013 |
20130169935 | Polarization 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. | 07-04-2013 |
20130182227 | Optical systems with compact back focal lengths - Optical systems, such as 2-D and 3-D projection systems, may be configured to have a compact back focal length to allow for more compact projection lenses, lower throw ratios, improved contrast, or any combination thereof. In an embodiment, an optical system may include a relay element configured to form an intermediate image having a focal point proximate to a projection lens. | 07-18-2013 |
20130188147 | THREE DIMENSIONAL IMAGE PROJECTOR WITH TWO COLOR IMAGING - A system provided for projecting a three-dimensional image. The system includes a first light source, emitting a light of a first color and a second light source emitting light of a second color. At least one polarizing beam splitter (PBS) is disposed adjacent the first light and the second light source, and at least one imaging device is disposed adjacent the at least one PBS. | 07-25-2013 |
20130188148 | THREE DIMENSIONAL IMAGE PROJECTOR STABILIZATION CIRCUIT - A projector system that includes a first input device, a second input device, a control device, a sensor and a phase locked loop (PLL). A phase reference signal is created based on a signal rate of the first input device. A phase feedback signal is created based on the rotational speed of the second input device as it is measured by the sensor. The PLL compares the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized. A signal is sent to the control device for the second input device to change the rotational speed of the second input device in response to determining that the first input device and the second input device are not synchronized. | 07-25-2013 |
20130188149 | THREE DIMENSIONAL IMAGE PROJECTOR - A system 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 |
20130188150 | THREE DIMENSIONAL IMAGE PROJECTOR WITH CIRCULAR LIGHT POLARIZATION - A system is provided for projecting a three-dimensional image. The system includes a light source and a polarization conversion system for converting light emitted from the light source to circular polarization. A beam splitter device is disposed adjacent the light source to receive light, and an LCoS image device is disposed adjacent the beam splitter device. | 07-25-2013 |
20130188151 | THREE DIMENSIONAL IMAGE PROJECTOR WITH CIRCULAR LIGHT POLARIZATION - A method is provided that includes providing a light source having a light emitting diode (LED) that emits a light. A polarization conversion system (PCS) is located adjacent the LED and has both a linear polarizer and a wave plate. A polarizing beam splitter (PBS) is adjacent the light source and an imaging device is adjacent the PBS. The wave plate of the PCS is rotated to a first position, and a first light is emitted by the LED in the first light source. This first light is converted to circular polarization. This first light travels to the PBS where it is reflected onto the imaging device. The wave plate is then rotated to a second position, and a second light is emitted by the light source. This second light is converted to circular polarization and reflects from the PBS onto the imaging device. | 07-25-2013 |
20130188152 | THREE DIMENSIONAL IMAGE PROJECTOR WITH TWO COLOR IMAGING - A method for projecting a three-dimensional image, that includes providing a first light source and a second light source. A polarizing beam splitter (PBS) is disposed adjacent the first light source and the second light source. An imaging device is adjacent the PBS. A polarization flipping element is disposed adjacent the PBS opposite the imaging device, and a mirror is disposed adjacent the polarization flipping element. A first light is emitted from the first light source. The first light is polarized such that it reflects through the PBS to a polarization flipping element. The first light passes through the polarization flipping element twice such that it will reach the surface of the imaging device. The second light is emitted from the second light source after the first light is emitted. The second light is polarized such that the light passes through the PBS to the imaging device. | 07-25-2013 |
20130208248 | Laser Scan Type Projector and Three Dimensional Display System - Disclosed is a laser scan type projector including laser light sources for three colors which alternately emits a laser light relating to an image for left eye and a laser light relating to an image for right eye on the basis of an image signal, a polarization switching unit which makes the laser light relating to the image for left eye and the laser light relating to the image for right eye, a first ¼ wavelength phase difference device which makes the two laser lights in which the polarization directions are switched by the polarization switching unit enter and which converts the polarization directions of the entered two laser lights so that each of the two laser lights be a circularly polarized light in an opposite direction from each other and a scan unit which scans a projection screen with the laser lights which are circularly polarized. | 08-15-2013 |
20130215392 | POLARIZATION CONVERTING ELEMENT GROUP FOR PROJECTION APPARATUS AND PROJECTION APPARATUS - A polarization converting element group for a projection apparatus is disclosed. The polarization converting element group includes a polarization beam splitter and a half wave plate. The polarization beam splitter splits a light beam into a first polarized light beam with a first polarization direction and a second polarized light beam with a second polarization direction. The half wave plate is placed next to the polarization beam splitter and reciprocally moves between the first and second position. At different time points, the half wave plate changes the polarization direction of the first light beam or the second light beam passing therethrough. With this arrangement, the light beam that exits the polarization converting element group will either be a uniform first polarized light with a first polarization direction or a uniform second polarized light with a second polarization direction. | 08-22-2013 |
20130265550 | IMAGE PROJECTION APPARATUS - The present disclosure may provide an image projection apparatus including a light source configured to generate a light bundle, a display element configured to form an image using the light bundle, and a illumination system disposed between the light source and the display element, wherein the illumination system includes a plurality of lenses disposed to illuminate the light bundle to the display element, and a polarization forming unit disposed between the plurality of lenses to convert the light bundle into polarized light in the illumination system so as to implement stereoscopic images. | 10-10-2013 |
20130271730 | ILLUMINATION SYSTEM FOR A PROJECTION APPARATUS AND PROJECTION APPARATUS - An illumination system and a projection apparatus adopting the illumination system are provided. The projection apparatus comprises the illumination system and a light modulator. The illumination system comprises at least one light source, a curved reflecting component, a phosphor wheel, a polarizer and a half wave retarder. The light provided by the at least one light source passes through the curved reflecting component and the phosphor wheel to provide a first light in a first time sequence and a second light in a second time sequence. The first light and the second light are transformed into a first polarized light and a second polarized light respectively in different time sequences by the polarizer and the half wave retarder. | 10-17-2013 |
20130301010 | PROJECTION APPARATUS FOR PROVIDING MULTIPLE VIEWING ANGLE IMAGES - A projection apparatus is disclosed. The projection apparatus includes a light source module, a first light splitting element, a first light valve unit, a first light modulator, a second light modulator and a light consolidating element. A light beam is provided by the light source module, and is split into a first and a second polarized light beam by the first light splitting element. In different time sequences, the first and the second polarized light beams are formed into a first, a second, a third and a fourth image light by the first light valve unit. Then, these image lights are transformed into viewing angle images by the first and the second light modulators. Then, via the light consolidating element, the first, the second, the third and the fourth view angle images are projected to a viewer and a stereoscopic image is formed. | 11-14-2013 |
20130329191 | PROJECTION AUTOSTEREOSCOPIC DISPLAY AND STEREO SCREEN - A projection auto-stereoscopic display includes an image projector ( | 12-12-2013 |
20140022510 | Image engine and projection system with two discrete format channels - An image engine and a projection system with two discrete format channels are described. The engine comprises a spatial light modulating system in each channel and a combining layer. A specific arrangement of the modulators of the two spatial light modulating systems relative to the combining layer makes it possible that one modulating system generates a landscape format image while the second modulating system generates a portrait format image in a common output path. In the projection system, a control logic addresses either the landscape channel or the portrait format channel or both channels, depending either on the format of the incoming image data, or on external controls. | 01-23-2014 |
20140049754 | THREE DIMENSIONAL IMAGE PROJECTOR STABILIZATION CIRCUIT - A method for providing a feedback circuit for a three dimensional projector. First and second input devices and a sensor for determining the rotational speed of the second input device are provided. A control device for controlling the rotational speed of the second input device and a phase locked loop (PLL) are provided. A phase reference signal is created based on the signal rate of the first input device. A phase signal is created based on the rotational speed of the second input device. The PLL compares the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized. A signal is sent to the control device for the second input device to change the rotational speed of the second input device in response to determining that the first input device and the second input device are not synchronized. | 02-20-2014 |
20140055753 | 3D PROJECTION OPTICAL SYSTEM AND DUAL-CHIP LIGHT SPLITTING AND LIGHT COMBINING MODULE THEREOF - A dual-chip light splitting and light combining module is provided, which comprises a light splitting prism, a first mirror, a first polarizing TIR prism, a first displaying chip, a second mirror, a second TIR prism, a second displaying chip and a light combining prism. The dual-chip light splitting and light combining module is adapted to split an incident non-polarized light into a first polarized light and a second polarized light and combine the first polarized light and the second polarized light together. Also, a 3D projection optical system comprising the dual-chip light splitting and light combining module is provided. | 02-27-2014 |
20140085609 | POLARIZATION PRESERVING DLP OPTICAL ARCHITECTURE - A DLP optical structure and corresponding method of controlling it are described including an optical integrator system having an optical integrator, a relay lens system, a TIR prism assembly, a digital imager, and a projection lens, said optical structure being adapted to accept a polarized light beam, said DLP optical structure comprising: at least one retarder positioned after said optical integrator for controlling the polarization state throughout said DLP optical structure, and achieving the desired polarization state after said projection lens; wherein said desired polarization state is substantially linear or circular. A DLP optical structure is also described including an optical integrator, a relay lens system, a TIR prism assembly, a digital imager and a projection lens, wherein the integrator is a fly-eye integrator for maintaining an input polarization of a light beam, and wherein said input polarization is linear or circular. DLP optical structures for use with a digital imager and a projection lens are also described, substantially as above but not including the features of the digital imager and projection lens. | 03-27-2014 |
20140092364 | APPARATUS AND METHOD FOR COMBINING LASER BEAMS OF DIFFERENT POLARIZATION - The present invention provides a light source apparatus ( | 04-03-2014 |
20140176911 | THREE DIMENSIONAL IMAGE PROJECTOR - A method is provided for projecting a three-dimensional image. The method includes providing a first light source that emits first eye images and a second light source that emits second eye images. A polarization of the first light source is orthogonal to a polarization of the second light source. A first eye image of a first color is projected from the first light source. A second eye image of the same first color is projected from the second light source. A first eye image of a second color is projected from the first light source. A second eye image of the same second color is projected from the second light source. A first eye image of a third color is projected from the first light source. A second eye image of a third color is projected from the second light source. | 06-26-2014 |
20140176912 | Polarized Stereoscopic Projection System and Method - A stereoscopic display system and method of stereoscopic projection that include a polarization-switching light source and a polarization-preserving projector. The polarization state of the polarization-switching light source is synchronized with alternate projection of left-eye images and right-eye images. The polarization-switching light source may include a laser and a rotating disk, and the disk may include a waveplate that switches the polarization state as the disk rotates. | 06-26-2014 |
20140185016 | Color-Based Stereoscopic Projection System and Method - A stereoscopic projection system and method of generating light that include two or three infrared lasers, two optical parametric oscillators, and six or seven second harmonic generators. Six colors of visible light are produced. Three bands of red, green, and blue form an image for the left eye of the viewer, while the other three bands of red, green, and blue form an image for the right eye of the viewer. | 07-03-2014 |
20140247428 | POLARIZATION PRESERVING 3D SCREEN - Projection 3D systems and polarization preserving 3D screens are described that substantially increase polarization contrast ratio and viewing angle. The screen comprises a structured surface having a certain slope distribution, formed by a plurality of beads | 09-04-2014 |
20140253879 | Polarization conversion system and method for projecting polarization encoded imagery - 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. | 09-11-2014 |
20140320822 | POLARIZING BEAM SPLITTERS PROVIDING HIGH RESOLUTION IMAGES AND SYSTEMS UTILIZING SUCH BEAM SPLITTERS - Polarizing beam splitters and systems incorporating such beam splitters are described. More specifically, polarizing beam splitters and systems with such beam splitters that incorporate multilayer optical films and reflect imaged light towards a viewer or viewing screen with high effective resolution are described. | 10-30-2014 |
20140375956 | PROJECTION DEVICE AND METHOD FOR OPERATING A PROJECTION DEVICE - A projection device may include at least one first laser device and one second laser device, which is arranged opposite the first laser device. A prism is arranged between the two laser devices, wherein a polarization-dependent mirror device is arranged in the prism in such a manner that the beam of the first laser device is reflected in a direction that extends opposite the direction in which the beam of the second laser device is reflected. The polarization of the beam of the second laser device is then rotated, and the beam is deflected back to the polarization-dependent mirror device. The beam of the second laser device now passes through the mirror device without reflection due to the change in the polarization of the beam of the second laser device, such that two superposed laser beams of different polarization are available at the output of the projection device. | 12-25-2014 |
20150077713 | METHOD AND PROJECTOR FOR PROJECTING A 3D IMAGE ONTO A PROJECTION SURFACE - Various embodiments relate to a method for projecting a 3D image onto a projection surface, which includes a first and a second partial images for a right and left eyes of a first viewer, respectively. A first illumination beam, which has electromagnetic radiation of a predetermined first property, is produced depending on first image data. A second illumination beam, which has electromagnetic radiation of a predetermined second property different from the first property, is produced depending on second image data. The first and the second illumination beam are deflected towards the projection surface such that the first and the second illumination beams produce a first and a second beam spots thereon, respectively. The first and the second beam spots are moved across the projection surface such that the first and the second partial images are shown with the aid of the first and the second beam spot, respectively. | 03-19-2015 |
20150103318 | STEREOSCOPIC IMAGE APPARATUS - A stereoscopic image apparatus that is capable of minimizing loss of optical energy and improving quality of a stereoscopic image is disclosed. The stereoscopic image apparatus includes a polarizing beam splitter to reflect or transmit incident light based on polarization components of the light to split the light in at least three different directions, a reflective member to reflect the light reflected by the polarizing beam splitter to a screen, at least one modulator to modulate the light reflected by the reflective member and the light transmitted through the polarizing beam splitter, and a refractive member disposed in an advancing direction of light to be incident upon the polarizing beam splitter to refract the light to be incident upon the polarizing beam splitter. | 04-16-2015 |
20150301346 | LIGHT SOURCE MODULE FOR STEREOSCOPIC DISPLAY, IMAGING DEVICE FOR STEREOSCOPIC DISPLAY AND STEREOSCOPIC DISPLAY SYSTEM - A light source module for stereoscopic display includes multi-primary color lasers which output the light with the same polarization direction. Respective lasers are divided into two groups according to the wavelengths of the output light. A light combiner is provided in the output light path of each laser group and is used for combining the output light of all lasers in the group into one output light path. The light source module further includes a polarization conversion rotary member, and the polarization direction of the two output light is periodically and alternately rotated by 90 degree by self-rotation of the polarization conversion rotary member. An imaging device for stereoscopic display includes the light source module for stereoscopic display, the light combiner and a first optical imaging modulator and a second optical imaging modulator. A stereoscopic display system includes the imaging device for stereoscopic display and a projection lens sub-system. | 10-22-2015 |
20150309323 | IMAGE PROJECTION APPARATUS - An image projection apparatus includes a light source for emitting a light bundle, a display element forming an image by using the light bundle, and a projection system having: a lens unit refracting the light bundle so as to magnify and project the image and including first and second aspheric lenses, which are spaced from each other and change the refraction of the light bundle, and at least one spherical lens disposed between the first and second aspheric lenses; and a mirror for reflecting, toward the outside, the light bundle delivered by the lens unit. | 10-29-2015 |
20150331249 | AUTO STEREOSCOPIC PROJECTOR SCREEN - A projector system using a screen comprised of either a plurality of miniature, reflective, and concave or convex curved surfaces that are arranged in a pattern to create a screen surface for front projection, or a plurality of miniature, transparent, and curved convex or concave lenses that are arranged in a pattern to create a screen surface for rear projection, and a projector system with the pixel capacity to control the color and brightness focused onto many different subsections of each curved surface. Each curved lens or curved mirror surface is small enough so that when viewed from the viewing area, the lit and unlit areas seen within each individual curved surface blend together so that only the average brightness and color of each curved surface can be seen by a viewer. By controlling the subsections of each curved surface with focused light from a high resolution projector, the system can control the image the viewer sees in their left eye separately from their right eye and the viewer can see stereographic images without the need to wear filtering glasses. With inclusion of an external head tracking system, the left/right images for each subsection can be switched as needed when one or multiple viewers move their head or seating position within the viewing area. | 11-19-2015 |
20150331306 | AUTO STEREOSCOPIC PROJECTOR SCREEN - A projector system using a screen comprised of either a plurality of miniature, reflective, and concave or convex curved surfaces that are arranged in a pattern to create a screen surface for front projection, or a plurality of miniature, transparent, and curved convex or concave lenses that are arranged in a pattern to create a screen surface for rear projection, and a projector system with the pixel capacity to control the color and brightness focused onto many different subsections of each curved surface. Each curved lens or curved mirror surface is small enough so that when viewed from the viewing area, the lit and unlit areas seen within each individual curved surface blend together so that only the average brightness and color of each curved surface can be seen by a viewer. By controlling the subsections of each curved surface with focused light from a high resolution projector, the system can control the image the viewer sees in their left eye separately from their right eye and the viewer can see stereographic images without the need to wear filtering glasses. With inclusion of an external head tracking system, the left/right images for each subsection can be switched as needed when one or multiple viewers move their head or seating position within the viewing area. | 11-19-2015 |
20160041460 | Polarization conversion systems for stereoscopic projection - 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. | 02-11-2016 |
20160054648 | DUAL PROJECTION IN SHORT SCREEN DISTANCE - A theatre system is described that includes a screen and a projection system. The projection system includes a first mirror and a second mirror that are positionable within axes for imaged light and between projection lenses of projectors and the screen. The axes include a first axis and a second axis. The first mirror and the second mirror are configured for causing the first axis and the second axis to be parallel to each other and to have a displacement between the first axis and second axis along a dimension by which the screen is curved. | 02-25-2016 |
20160062130 | AUTOSTEREOSCOPIC DISPLAY DEVICE AND AUTOSTEREOSCOPIC DISPLAY METHOD USING THE SAME - An autostereoscopic display device includes a projector module, a screen, and a window. The projector module includes a first projector and a second projector. The first projector is used for providing a first image unit with a first polarization, and the second projector is used for providing a second image unit with a second polarization. The screen is used for reflecting the first image unit and the second image unit. The screen is disposed at the same side of the projector module and the window, and a projective location of the projector module on the window is at an edge of the window. The window includes a divided visual-field area and a liquid-crystal silt layer. The liquid-crystal silt layer is used for allowing a portion of the first image unit and a portion of the second image unit passing through the divided visual-field area to pass therethrough. | 03-03-2016 |
20160097971 | IMAGE PROJECTION APPARATUS, IMAGE PROJECTION SYSTEM, IMAGE PROJECTION METHOD, AND DISPLAY APPARATUS - [Object] To be able to provide an audience with an image having more presence, and also to provide a variety of image expressions. | 04-07-2016 |
20160100157 | Wide field-of-view stereoscopic projection system - Disclosed embodiments relate to a stereoscopic projection system and methods. An exemplary disclosed projection system includes an optical component disposed between the lenses of a lens arrangement. An exemplary lens arrangement includes a first power group, a second power group, and an aperture stop. In an embodiment, the optical component is disposed between the first power group and the aperture stop. In an exemplary embodiment, the optical component is proximate to the aperture stop. By disposing the optical component closer to or proximate to the aperture stop in the lens arrangement, various benefits may be realized, including improved contrast uniformity. | 04-07-2016 |
20160124238 | OPTICAL POLARISATION DEVICE FOR A STEREOSCOPIC IMAGE PROJECTOR - An optical polarization device for a stereoscopic image projector, including: a polarizer optical element including two beam splitter-polarizer plates, joined to one another; first and second optical reflectors configured to modify, respectively, a trajectory of first and second light beams reflected such that the reflected and transmitted light beams are projected to form one and same stereoscopic image; first, second, and third polarization modulators configured to selectively switch the optical polarization, respectively, of a transmitted light beam, of the first and of the second reflected light beams, between the first and second states of optical polarization; and a control circuit for the polarization modulators. | 05-05-2016 |
20160150225 | PROJECTOR AND PROJECTION DISPLAY DEVICE - A projector includes: an optical element including first and second regions and which diffuses light that has entered the regions; an irradiation device for irradiating the first and second regions with light in a time-divisional manner; a polarization control unit disposed on a plane which is conjugate to a plane on which the optical element is disposed; and a spatial light modulator disposed in a light path from the optical element to the polarization control unit and which is illuminated with light that has been diffused by the first and second regions. The polarization control unit is configured to control the polarization state of light so that light that has been diffused by the first region becomes light of a first polarization component, and light that has been diffused by the second region becomes light of a second polarization component which differs from the first polarization component. | 05-26-2016 |
20160195725 | WEARABLE AUDIO-VISUAL DEVICE | 07-07-2016 |
20160195802 | POLARIZED PROJECTION DEVICE AND POLARIZED PROJECTION SYSTEM USING THE SAME | 07-07-2016 |