Patent application number | Description | Published |
20080198338 | PROJECTION DISPLAY APPARATUS - A projection display apparatus is provided with a projection distance adjustment mechanism for adjusting a distance between a projection plane and an emitting position of projection light, and provided with a focus adjustment mechanism for making a focus adjustment of a projection image with respect to the projection plane. The focus adjustment mechanism is driven such that a projection image is properly focused onto the projection plane in accordance with the distance between the projection plane and the emitting position. | 08-21-2008 |
20080218037 | Holding structure and projection display device - A member to be held is held in an external cabinet having a combination of a first cabinet and a second cabinet. A first supporting section is provided in the first cabinet and a second supporting section is provided in the second cabinet. A section to be sandwiched is provided in the member to be held, and the member to be held is held in the external cabinet by sandwiching this section to be sandwiched by the first supporting section and the second supporting section. | 09-11-2008 |
20080218644 | PROJECTION DISPLAY DEVICE - A projection display device comprises: a light source; liquid crystal panels disposed corresponding to R light, G light and B light; a light guiding optical system for guiding R light, G light and B light among light from the light source to respective corresponding liquid crystal panels; a dichroic prism for synthesizing the R light, G light and B light modulated by the liquid crystal panels; a projection optical system having a curved mirror for enlarging and projecting the light synthesized by the dichroic prism; and a bending mirror. A placement plane for optical members is orthogonal to a projection plane (screen surface), and shorter sides of optical members forming the liquid crystal panels and the light guiding optical system are placed on the placement plane. | 09-11-2008 |
20080218706 | Projection display device - A projection display device comprises a projection lens section to which light modulated by a light modulating element is entered, a mirror section for reflecting the light emitted from the projection lens section to reflect to the projection lens section side and directing the light to a projection plane, and an operation section for displacing a lens in the projection lens section. The operation section is disposed in a region in which the operation section does not hinder an optical path of the light that has been passed through a projection port provided in a main body cabinet. | 09-11-2008 |
20080225237 | PROJECTION 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 |
20090040473 | PROJECTION IMAGE DISPLAY APPARATUS - A projection image display apparatus includes a lens unit into which light modulated in accordance with an image signal is entered, a first reflecting mirror having a reflecting surface into which the light passing through the lens unit is entered and by which the light is converged, a second reflecting mirror for reflecting the light reflected by the first reflecting mirror, and a mirror actuator for changing a tilt angle of the second reflecting mirror with respect to the light. | 02-12-2009 |
20090096992 | PROJECTION 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 |
20090153809 | PROJECTION OPTICAL SYSTEM AND PROJECTION DISPLAY DEVICE - A projection optical system includes a first refracting optical system having a plurality of lenses, a first reflecting optical system, and a second reflecting optical system. The first reflecting optical system is disposed on a side of a projection port with respect to an optical axis of the first refracting optical system, and has a positive optical power to reflect light incident through the first refracting optical system in a direction opposite to the side of the projection port. The second reflecting optical system is operable to reflect the light reflected on the first reflecting optical system toward the projection port. | 06-18-2009 |
20090279055 | PROJECTION DISPLAY DEVICE - A projection display device has an imager that modulates light from a light source in accordance with an image signal, a projection optical system that enlarges and projects the light modulated by the imager onto a projection plane, a focus adjustment part disposed in the projection optical system, and a displacement part that displaces the imager in a direction vertical to a light axis of the projection optical system, in conjunction with the focus adjustment part. | 11-12-2009 |
20100171938 | PROJECTION DISPLAY DEVICE - A projection display device includes an imager which modulates light from a light source based on an image signal; a projection optical system which enlarges and projects the light modulated by the imager onto a projection plane; and a shift mechanism which displaces the imager in a direction intersecting with an optical axis of the projection optical system. The projection optical system and the shift mechanism are co-mounted on a base member. | 07-08-2010 |
20100182575 | PROJECTION-TYPE IMAGE DISPLAY DEVICE AND PROJECTION-TYPE IMAGE DISPLAY SYSTEM - A projection-type image display device includes an image light generator configured to generate image light, a projection optics configured to project the image light onto a screen. The projection optics includes a s reflection mirror configured to reflect the image light toward the screen, the image light outputted from the image light generator. A projection-type image display device includes a protective cover provided on an optical path of the image light reflected by the reflection mirror. The protective cover has a transmissive region transmitting the image light reflected by the reflection mirror. | 07-22-2010 |
20110063586 | PROJECTION DISPLAY DEVICE - A projection display device includes: an optical engine that emits image light in a direction parallel to a projection plane; a first reflective optical system that reflects the image light in a first direction away from the projection plane; a second reflective optical system that reflects the image light reflected by the first reflective optical system in a second direction away from the optical engine and closer to the projection plane; and a refractive optical system. The refractive optical system is divided into a first refractive optical system interposed between the optical engine and first reflective optical system, and second refractive optical system interposed between the first and second reflective optical system. The optical engine is arranged so that a mounting plane of optical components is almost perpendicular to a plane parallel to both of the first and second directions and is almost parallel to the projection plane. | 03-17-2011 |
20110157555 | STEREOSCOPIC-IMAGE DISPLAY DEVICE - An image signal storing unit stores an image signal provided from the outside. An image processing unit appropriately processes the image signal stored in the image signal storing unit in accordance with the instruction from an adjusting unit. A projecting unit projects, onto a display area, light corresponding to an image created by the image processing unit. A display size determination unit computes the display size of the picture plane displayed on a screen based on an image captured by the camera provided adjacent to the projection-type video-image display device. The display size determination unit then determines whether or not the display size of the picture plane is equal to or larger than a predetermined upper-limit size. | 06-30-2011 |
20110267589 | PROJECTION-TYPE IMAGE DISPLAY DEVICE AND PROJECTION-TYPE IMAGE DISPLAY SYSTEM - A projection-type image display device includes an image light generator configured to generate image light, a projection optics configured to project the image light onto a screen. The projection optics includes a reflection mirror configured to reflect the image light toward the screen, the image light outputted from the image light generator. A projection-type image display device includes a protective cover provided on an optical path of the image light reflected by the reflection mirror. The protective cover has a transmissive region transmitting the image light reflected by the reflection mirror. | 11-03-2011 |
20110292355 | REFRACTIVE OPTICS AND PROJECTION DISPLAY APPARATUS - Disclosed are a projection display apparatus and a projection optics provided in the projection display apparatus. The projection optics has a refractive optics and a reflective optics. In the refractive optics, a lens (non-circular lens) provided on a reflective optics side has a non-circular shape forming part of an imaginary circular region whose center is an optical axis center of the refractive optics. In other words, the non-circular lens has a shape of a cut-out portion of an imaginary circular lens having an optical axis center coinciding with the optical axis center of the refractive optics. | 12-01-2011 |
20120019782 | PROJECTION 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 |
20120133909 | PROJECTION DISPLAY APPARATUS - A projection display apparatus includes a housing member that houses a light source, an imager that modulates light emitted from the light source, and a projection unit that projects light emitted from the imager onto a projection plane, wherein the projection unit has a concave mirror that reflects the light emitted from the imager to the projection plane side, and the housing member pivotally supports the concave mirror along a circumference of a virtual circle formed by a virtual extension line of the concave mirror. | 05-31-2012 |
20120281188 | PROJECTION DISPLAY DEVICE HAVING AN OPERATION SECTION FOR DISPLACING A LENS - A projection display device comprises a projection lens section to which light modulated by a light modulating element is entered, a mirror section for reflecting the light emitted from the projection lens section to reflect to the projection lens section side and directing the light to a projection plane, and an operation section for displacing a lens in the projection lens section. The operation section is disposed in a region in which the operation section does not hinder an optical path of the light that has been passed through a projection port provided in a main body cabinet. | 11-08-2012 |