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| Number | Title | Issue Date |
| 8149341 | LCD apparatus An LCD panel (214) is provided on the light-incidence side thereof with a reflective polarizer. An optical compensator (213) is provided between a reflective polarizer (211) and the LCD panel (214) to reduce birefringence that takes place... | 04/03/2012 |
| 8111338 | Beam shaping device A beam shaping device (1; 50; 60) comprising first (3) and second (4) substrates, a liquid crystal layer (2) sandwiched between the substrates, and a first electrode layer (5; 51) provided on a side of the first substrate (3... | 02/07/2012 |
| 8094246 | Polarization conversion device, polarized illumination optical device, and liquid crystal projector A polarizing split layer and a reflection layer are alternately provided on bonding surfaces between prism rods which constitute a polarized beam splitter array. Polarization conversion devices are bonded to emission surfaces of the prism rods from which linearly po... | 01/10/2012 |
| 8049824 | Single-layer birefringent crystal trim retarders A single-layer birefringent crystal trim retarder includes a birefringent crystal cut such that its optic axis is at a high oblique angle and such that it provides low in-plane retardance values even when the birefringent crystal is relatively thick. To compensate f... | 11/01/2011 |
| 8035758 | Image display apparatus with light path separation to return a polarized light component An image display apparatus includes a polarization conversion element which converts second color light of unpolarized light emitted from a light source into a first linear polarized light, and a light path separation element which separates the second color light e... | 10/11/2011 |
| 8035759 | Polarization conversion device, polarized illumination optical device, and liquid crystal projector Polarizing split layers 26 and reflection layers 27 are provided on bonding surfaces between prism rods 24a and 24b. Polarization conversion devices 25 are bonded to an emission surface from which linearly polarized l... | 10/11/2011 |
| 7936403 | Liquid crystal display apparatus having both organic and inorganic polarizers A liquid crystal display apparatus is provided. The liquid crystal display apparatus includes at least one incidence-side polarizer, a liquid crystal panel, at least one output-side polarizer, and a mechanism for turning each of the incidence-side polarizer and the ... | 05/03/2011 |
| 7773163 | Reflective liquid crystal display device and projection display apparatus using the same A reflective liquid crystal display device combined with an optical system with a wire grid is provided for light modulation by a liquid crystal layer. This layer, made of nematic liquid crystal having negative dielectric anisotropy, is formed such that first and se... | 08/10/2010 |
| 7659946 | Liquid crystal projector Disclosed is a transmissive liquid crystal projector carrying a vertical alignment liquid crystal device. The liquid crystal projector includes a liquid crystal panel (25), on the light incident side and on the light radiating side of which a light incident s... | 02/09/2010 |
| 7602449 | Projection type liquid crystal display unit with reflected incident light A projection type liquid crystal display unit includes (a) a first frame (13) having a first surface (15) formed with a first opening (13a), (b) a second frame (12) having a second surface formed with a second opening (12... | 10/13/2009 |
| 7443565 | Image display apparatus, projector, and polarization compensation system Aspects of the invention can provide an image display apparatus for displaying an image by modulating light from a light source based on display image data. The apparatus can include a first light modulator device can modulate light from the light source, a second l... | 10/28/2008 |
| 7429110 | Projector-type image display apparatus At least one exemplary embodiment is directed to a projector which includes several optical elements, reflective devices and beam splitters, arranged to reduce back reflection effects. At least one exemplary embodiment includes a mirror, two beam splitters, three re... | 09/30/2008 |
| 7411634 | LCD TV and projection-based backlight system used therefor An LCD TV includes a housing, an LCD screen panel disposed on the front side of the housing, a first mirror disposed on the back side of the housing and a projection-based backlight system disposed in a lower cabinet of the housing, wherein the projection-based back... | 08/12/2008 |
| 7411635 | LCD TV and projection-based backlight system used therefor An LCD TV includes a housing, an LCD screen panel disposed on the front side of the housing, a first mirror disposed on the back side of the housing and a projection-based backlight system disposed in a lower cabinet of the housing, wherein the projection-based back... | 08/12/2008 |
| 7400100 | Discharge-lamp lighting apparatus and projector A discharge-lamp lighting apparatus includes a control circuit that determines electric power supplied to a high-pressure discharge lamp after the high-pressure discharge lamp is started by an igniter. The electric power is determined in accordance with a voltage co... | 07/15/2008 |
| 7400377 | Display having particular polarisation modifying layer A display is provided for providing a restricted viewing mode, for example a private viewing mode where the display may be viewed from a limited region of space by a single viewer and not by other people outside the viewing region. The display comprises a source of ... | 07/15/2008 |
| 7396130 | Optical system, image projection apparatus and method thereof An image projection apparatus. The image projection apparatus comprises a light source and LCD panel. The LCD panel comprises a plurality of pixels and color filters thereon. Light from the light source is projected to the pixels along an irradiative path and the LC... | 07/08/2008 |
| 7390095 | Projector Aspects of the invention can provide a projector that includes three optical modulators which modulate respectively red light, green light, and blue light, a color-synthetic optical system which synthesizes the light modulated by the three optical modulators, and a ... | 06/24/2008 |
| 7390094 | Method and apparatus to achieve a neutral dark state in image projection systems An absorptive layer is added to an image display system. The absorptive layer is selected to compensate for tint in a black state of a displayed image. In a Liquid Crystal On Silicon (LCOS) based light engine, blue wavelengths may cause a predominate tint in black p... | 06/24/2008 |
| 7387391 | Apparatus and method for mounting imagers on stress-sensitive polarizing beam splitters An optical device that includes an optical element, an imager, and a prism bracket. The optical element includes an optical element having first and second prisms coupled together. The imager is arranged adjacent to the first prism and configured to receive light fr... | 06/17/2008 |
| 7377649 | Projector arrangement A projector arrangement is provided wherein a spectral splitting and recombination unit (SSR) includes a first and a second polarization selective or polarizing beam splitting device and a wavelength selective optical element (WSOE) which are sufficient to realize t... | 05/27/2008 |
| 7369186 | Polarizing beam splitter featuring stacked grating layers and display including the same A polarizing beam splitter includes a polarization splitting layer which includes stacked one-dimensional grating layers. The grating layers can include alternating layers of at least one H layer having an effective refractive index nH for p-polarized lig... | 05/06/2008 |
| 7364302 | Projection display system using multiple light sources and polarizing element for using with same An image projection system has two illumination beams of different colors. A first polarizing beamsplitter (PBS) has first and second input faces. Light of the first color is incident on the first input face and the light of the second color is incident on second in... | 04/29/2008 |
| 7364312 | Light source lamp and projector A light source lamp, in which reduction of the available amount of illumination light on an illuminated region side can be reduced or suppressed, heightens light utilizing efficiency. The light source lamp has a light emitting tube having a luminous part in which a ... | 04/29/2008 |
| 7360899 | Beamsplitting structures and methods in optical systems Various embodiments involving structures and methods for illumination can be employed, for example, in projectors, head-mounted displays, helmet-mounted displays, back projection TVs, flat panel displays as well as other optical systems. Certain embodiments may incl... | 04/22/2008 |
| 7360901 | Cross dichroic mirror, illuminating device, and projection type video display A projection type video display is provided with three LED light sources. A first LED light source emits a light in red, a second LED light source emits a light in green, and a third LED light source emits a light in blue. Lights in respective colors emitted from ea... | 04/22/2008 |
| 7359008 | Dynamic range and contrast enhancement for microdisplay The invention relates to a light valve system that enhances the contrast ratio for light and dark video images and reduces contouring artifacts. The light valve system comprises a color selection device configured to temporally attenuate component color bands of lig... | 04/15/2008 |
| 7354162 | Projector A projector includes: a light source device that emits substantially parallel illumination light; a first lens array having a plurality of first small lenses each of which divides the illumination light coming from the light source device into a plurality of partial... | 04/08/2008 |
| 7352416 | Polarization direction of incident light beam perpendicular or parallel to liquid display molecular orientation for reduced drive voltage A liquid crystal display element comprising two transparent substrates, at least one of which is transparent, and a liquid crystal layer interposed between the two substrates. A plurality of pixels and active elements for driving the liquid crystal at the plurality ... | 04/01/2008 |
| 7347558 | 3D kernel and prism assembly design A Liquid Crystal on Silicon (LCOS kernel for a light engine is configured in a kernel having light paths in three dimensions (3D kernel). The 3D kernel allows for designs that do not require Wavelength Dependent Waveplates (WDWs) (or Wavelength Specific Retarders) f... | 03/25/2008 |
| 7347557 | Projector system comprising pulsed light sources A projection system comprising a light source is disclosed, wherein the light source comprises at least two light emitters arranged to be optically positionable alternately in a first position and a second position by an optical positioning means wherein said optica... | 03/25/2008 |
| 7349048 | Method and apparatus for adjusting light intensity A variable retarder and linear polarizer are placed in series in a polarized light path. A transmission axis of the linear polarizer is parallel to an axis of a polarization of the polarized light. An amount of retardation dialed into the variable retarder causes an... | 03/25/2008 |
| 7347559 | Color video projection system employing reflective liquid crystal display devices Methods and apparatuses for use in image projecting are provided. One apparatus includes a transflective polarizing beam splitter, a plurality of reflective liquid crystal light valves, and a spectrally selective output device. The beam splitter is capable of receiv... | 03/25/2008 |
| 7344254 | Projection system with a common light source sharing system A projection display with a common light source sharing system for improved illumination uniformity is described. The common light source is coupled through a light-dividing prism to multiple integrators. Each integrator is coupled to one or more imaging devices tha... | 03/18/2008 |
| 7342619 | Polarization light splitting film, backlight system and liquid crystal display A polarization light splitting film having a light receiving side and a light transmitting side. The polarization light splitting film includes an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized ... | 03/11/2008 |
| 7339567 | Liquid crystal panel substrate, liquid crystal panel, and electronic equipment and projection type display device both using the same The present invention is a liquid crystal panel substrate that comprises: pixel units each having a pixel electrode, to be used as a reflective electrode and arranged in a matrix pattern on a substrate, and a switching element controlling a voltage applied to the pi... | 03/04/2008 |
| 7339735 | Polarization recovery system for projection displays A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD imager. The compact polarization recovery waveguide system generally in... | 03/04/2008 |
| 7334900 | Three-dimensional image projecting apparatus The invention provides a three-dimensional image projecting apparatus. The three-dimensional image projecting apparatus comprises a light signal generator, a filter device, a focusing device and a reflecting device. The light signal generator is used for generating ... | 02/26/2008 |
| 7331676 | Apparatus for projecting a reduced image of a photomask using a schwarzschild objective An optical system for projecting an image of a photomask on a substrate, using a Schwarzschild objective includes an excimer laser, beam shaping optics for shaping a laser beam from the laser and a beam-dividing prism. The beam-dividing prism has a dividing-face inc... | 02/19/2008 |
| 7331682 | Back light module with birefringent crystal assemblies A back light module (100) includes a light guide plate (130), a number of light sources (110) at one side of the light guide plate, and a number of birefringent crystal assemblies (120) respectively located between the light sources and t... | 02/19/2008 |
