| Entries |
| Document | Title | Date |
|---|
| 20080204609 | 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 reflection devices, and two optical elements affecting polarization of incident light upon the optical elements. | 08-28-2008 |
| 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 |
| 20080225188 | Liquid Crystal Projector, and Liquid Crystal Panel and Liquid Cooling Apparatus Thereof - A liquid crystal projector, a liquid crystal panel, and a liquid cooling apparatus, for obtaining a picture without disturbance due to a liquid coolant passing through a transparent surface of the liquid crystal panel, with achieving cooling effectively with an aid of a liquid cooling cycle, wherein lights from a light source | 09-18-2008 |
| 20080231766 | PROJECTOR - A projector includes: an optical modulator including a liquid crystal cell, a first optical element formed of an optical material having positive uniaxiality, a second optical element formed of an optical material having positive uniaxiality, a third optical element that includes at least one optical film formed of an optical material having a refractive index anisotropy, and a pair of polarization elements; an adjustment mechanism that makes it possible to adjust an optical azimuth of a first group, which has at least one of the first optical element, the second optical element, and at least one optical film included in the third optical element, with respect to a fixed optical azimuth of a second group as a remainder excluding the element included in the first group among the first to third optical elements; a light source that generates light for illuminating the optical modulator; and a projection optical system that projects the light that has passed through the optical modulator. | 09-25-2008 |
| 20080239173 | Projector - A projector includes an illumination device that emits an illumination light flux, a color-separating optical system that separates light from the illumination device into plural color lights and directs the color lights to an illuminated area, and a plurality of liquid crystal light valves that have liquid crystal panels. The crystal light valves are configured to maximize light utilization efficiency. | 10-02-2008 |
| 20080252800 | Twisted Nematic xLCD Contrast Compensation With Tilted-Plate Retarders - Contrast compensation for a liquid crystal display projection system including a light source, a first polarizer, a liquid crystal display panel, and a second polarizer is provided using a tilted compensating plate. The compensating plate includes a first birefringent element having an optic axis oriented at a first angle to the plate normal, where the first angle is greater than zero degrees (e.g., an A-plate or O-plate), and a second birefringent element having an optic axis oriented at a second angle to the plate normal, where the second angle is substantially equal to zero degrees (e.g., a C-plate). The compensating plate is tilted relative to a plane of the liquid crystal display panel. The tilted compensating plate has been shown to provide improved contrast compensation for twisted nematic liquid crystal displays. | 10-16-2008 |
| 20080259230 | Polarizing sheet and production method thereof - A polarizing sheet having a transparent substrate on both surfaces of a polarizing film containing a polarizer, wherein exposed portions of the polarizing film not covered by the transparent substrate are covered with a sealing material. | 10-23-2008 |
| 20080259231 | PROJECTOR - A projector includes a lighting device, a first image forming unit including first through third light modulation elements, a second image forming unit including fourth through sixth light modulation elements, a polarization combining optical system, a projection optical system, and an image correction device, wherein the image correction device, based on one of combined transmittance and combined reflectance obtained by combining one of transmittances and reflectances corresponding to gray-scale values of two of the first through sixth light modulation elements for modulating the same colored light beam, outputs the drive value corresponding to the input image data for driving the two light modulation elements corresponding to the predetermined colored light beam. | 10-23-2008 |
| 20080266470 | RETARDATION COMPENSATION PLATE, RETARDATION COMPENSATOR, LIQUID CRYSTAL DISPLAY DEVICE, AND PROJECTION-TYPE IMAGE DISPLAY DEVICE - A retardation compensation plate having a birefringent property for compensating residual retardation of a liquid crystal panel includes: a combined unit formed of an optical multi-layered film composed of a plurality of layers having different refractive indices stacked in a regular order and a polymer film. In the retardation compensation plate, the retardation compensation plate and the liquid crystal panel have in-plane retardations that satisfy the relationship: 1| 10-30-2008 | |
| 20080278639 | DIRECTIONAL DISPLAY DEVICE - A directional display device that separates and displays images on an image display surface of a display panel in different viewing directions. The directional display device includes a polarization control unit which is arranged in front of the display panel. A liquid crystal lens is arranged in front of the polarization control unit. A polarization plate is arranged in front of the liquid crystal lens. The polarization control unit has first and second polarization areas which change incident light rays to light rays having different polarization axes. The liquid crystal lens includes a lens layer including having lenses with a predetermined refractive index and a liquid crystal layer. An alignment state of the liquid crystal layer is changed so as to change the refractive index of the liquid crystal layer and change the refractive power of the liquid crystal lens. | 11-13-2008 |
| 20080303962 | LIQUID CRYSTAL PROJECTOR AND A METHOD OF CONTROLLING THE SAME - A liquid crystal projector for projecting a three-dimensional image includes: a liquid crystal panel to which a normal voltage and an inversion voltage are alternately applied; and a drive circuit for driving the liquid crystal panel in order of a first state corresponding to a first image signal, the first state corresponding to a second image signal, a second state corresponding to the first image signal, and the second state corresponding to the second image signal, one of the image signals for the left-hand and the right-hand eyes being set as the first image signal, the other thereof being set as the second image signal, one of a normal state of the voltage applied to the liquid crystal panel, and an inversion state of the voltage applied to the liquid crystal panel being set as the first state, the other thereof being set as the second state. | 12-11-2008 |
| 20080316376 | LIQUID CRYSTAL PROJECTOR - An LCD projector has LCD panels, each including polarization plates one on the light incidence side and another on the light emitting side of each LCD panel. The LCD panel is provided with a highly transparent auxiliary polarization plate between the LCD panel and the polarization plate on the light emitting side. The LCD panel is further provided with an optically anisotropic transparent substrate for supporting the highly transparent auxiliary polarization plate. The transparent substrate is arranged such that one of its anisotropic optical axes is inclined at an angle not more than 0.5 degrees with respect to the face of the auxiliary polarization plate when the face is parallel to the direction of light propagation. This arrangement ensures longer lives of the polarization plates on the light emitting sides while suppressing color irregularity on a black screen and degradation of picture contrast of the LCD projector. | 12-25-2008 |
| 20090002578 | PROJECTION SYSTEM - A projection system which has a plurality of liquid-crystal displays each includes a display panel having a plurality of OCB-mode liquid-crystal pixels, and a control unit configured to control the display panel, and which synthesizes images of different colors, modulated by the display panels, thereby to display a color image, wherein each of the liquid-crystal displays includes a temperature sensor, and the control unit of each liquid-crystal display controls at least one condition of driving the display panel in accordance with the temperature detected by any one of the temperature sensors. | 01-01-2009 |
| 20090051833 | LIQUID CRYSTAL DISPLAY, AND PROJECTION TYPE DISPLAY USING LIQUID CRYSTAL DISPLAY LAYER - There is provided a micro lens array ( | 02-26-2009 |
| 20090059103 | Methods and systems for image processing and display - Methods and systems for displaying or projecting images that may be implemented to provide the ability for a user of an information handling system to view a selected image on a display or projection screen privately, while allowing other images to appear on the display or projection screen which are publicly viewable to other users who cannot see the privately-displayed image. With appropriate intervening polarization, a user may be allowed to view the private image as well as any displayed or projected publicly viewable images, and the private image and publicly viewable images may be optionally simultaneously displayed or projected if so desired. | 03-05-2009 |
| 20090059104 | LIQUID CRYSTAL DISPLAY DEVICE AND PROJECTION-TYPE DISPLAY DEVICE - The problem to be solved is to suppress image quality degradation caused by polarizers and provide improved light fastness. | 03-05-2009 |
| 20090073329 | LIQUID CRYSTAL PANEL AND PROJECTOR USING THE SAME - A liquid crystal panel includes a liquid crystal display element, a micro-lens array, an adjustable lens array, and a lens control unit electrically connected to the adjustable lens array. The liquid crystal display element has a light input surface and a light output surface opposite to the light input surface. The micro-lens array has a plurality of micro-lenses disposed on the light input surface of the liquid crystal display element). The adjustable lens array has a plurality of adjustable lenses disposed on the light output surface of the liquid crystal display element. The lens control unit is capable of controlling focal lengths of the plurality of adjustable lenses. | 03-19-2009 |
| 20090109354 | AUTOMATIC DUST-REMOVING DEVICE FOR A LIQUID CRYSTAL PANEL AND PROJECTOR USING THE SAME - A projector ( | 04-30-2009 |
| 20090109355 | Polarizer, method of manufacturing polarizer and liquid crystal projector - A polarizer capable of being manufactured in simple steps, and a method of manufacturing the polarizer, as well as a liquid crystal projector are provided. The polarizer includes a substrate having light permeability, and a plurality of linear projections being arranged on the substrate and extending along one direction within a plane thereof. Each of the linear projections having a base layer and a plating layer in the named order from the substrate, the base layer containing a catalyst material for electroless plating process, and the plating layer being deposited by using the base layer as a catalyst. | 04-30-2009 |
| 20090128718 | RETARDATION COMPENSATION ELEMENT, LIQUID CRYSTAL DISPLAY DEVICE, AND LIQUID CRYSTAL PROJECTOR - A retardation compensation element ( | 05-21-2009 |
| 20090128719 | LIQUID CRYSTAL DEVICE, PROJECTOR, AND OPTICAL COMPENSATION METHOD OF LIQUID CRYSTAL DEVICE - The disclosure includes a liquid crystal device, a projector and an optical compensation method of a liquid crystal device. In one embodiment, a liquid crystal device includes a liquid crystal panel having a pair of substrates, each of which has an alignment film. A vertically-aligned liquid crystal, which has liquid crystal molecules pretilted by the alignment films, is interposed between the pair of substrates and modulates light. A pair of polarizing films interposes the liquid crystal panel therebetween. A first retardation film is disposed between the pair of polarizing films and includes (i) a first substrate and (ii) a first deposited film maintaining a first refractive anisotropy and being obliquely deposited on the first substrate so that a first optical axis of the first refractive anisotropy is tilted in a direction in which a variation in characteristic of the light due to the pretilted liquid crystal molecules is canceled. | 05-21-2009 |
| 20090128720 | Liquid crystal display device and projection type liquid crystal display apparatus - A liquid crystal display device and a projection type liquid crystal display apparatus are provided. The liquid crystal display device includes two substrates opposed each other, a liquid crystal layer arranged between the two substrates, a plurality of pixel electrodes arranged on the opposed surfaces of the substrates to form pixels in a matrix form, and alignment films formed on the two substrates to align liquid crystal of the liquid crystal layer in a predetermined direction. The pixels arranged in the matrix form have different spacings between the pixels. | 05-21-2009 |
| 20090147159 | PROJECTOR - A projector includes a plurality of light sources, a liquid crystal display panel, a field lens and a flat mirror. The light sources provide color light beams. The liquid crystal display panel is capable of full color display. The field lens is disposed between the light sources and the liquid crystal display panel. The flat mirror is disposed between the light sources and the field lens. The light beams are reflected by the flat mirror to the field lens, and then pass through the field lens and change in different directions, entering the liquid crystal display panel with different incident angles. The projector further includes a curved mirror. The curved mirror replaces the field lens and the flat mirror. The light beams are reflected by the curved mirror and change in different direction, entering the liquid crystal display panel with different incident angles. | 06-11-2009 |
| 20090161032 | POLARIZATION OPTICAL SYSTEM AND PROJECTION-TYPE LIQUID-CRYSTAL DISPLAY DEVICE - A polarization optical system includes a first polarization plate, arranged at the light incident side of a liquid-crystal light valve, for transmitting first polarized light (s-polarized light) included in light incident on the liquid-crystal light valve from an illumination optical system and a second polarization plate, arranged at the light exit side of the liquid-crystal light valve, for transmitting second polarized light (p-polarized light), different from the first polarized light (s-polarized light), included in imaging light emitted from the liquid-crystal light valve to a projection optical system, in which the second polarization plate is configured in such a way that its light-incident face is concave toward the liquid-crystal light valve. | 06-25-2009 |
| 20090161033 | LIQUID CRYSTAL PROJECTOR AND IMAGE REPRODUCING DEVICE - In order to miniaturize a projector as a whole to such a degree that the projector can be included in a small device such as a portable telephone terminal or the like, a red laser light beam ( | 06-25-2009 |
| 20090185086 | LIGHT MODULATOR FOR OPTICAL IMAGE PROJECTION - A spatial light modulator | 07-23-2009 |
| 20090195713 | Shared light source in an electronic device - An optical module is used in an electronic device to share a light source. The light source can be shared concurrently with an image projection device and a different component, such as a liquid crystal display device. Alternatively, the light source is used for providing illumination to the component only when the light source is not used by the image projection device. When the light source is used for providing illumination to the liquid crystal display device, at least part of the light beam from the light source is coupled to a back-light unit of the display device, for example. In addition to providing illumination to the liquid crystal display device, part of the light beam can also be used to provide illumination to other accessories or components, such as a keyboard of the electronic device. | 08-06-2009 |
| 20090231498 | LIQUID CRYSTAL PROJECTION APPARATUS - A liquid crystal projection apparatus has an image synthesizing means comprising: a color synthesization prism having an upper surface, a lower surface facing the upper surface, and three light incident faces between the upper and lower surfaces; an upper prism pedestal provided on the upper surface of the color synthesization prism; a lower prism pedestal provided on the lower surface of the color synthesization prism; an upper liquid crystal panel holder provided on the upper prism pedestal and having a multiplicity of first jointing sections, a lower liquid crystal panel holder provided on the lower prism pedestal and having a multiplicity of second jointing sections; three liquid crystal panels; and three liquid crystal panel mounting members securely fixing thereon the three liquid crystal panels, the three mounting members arranged on the respective three incident faces of the color synthesization prism and adapted to joint the first jointing sections located in association with the respective incident faces to corresponding second jointing sections located in association with the corresponding incident faces. Thus, a liquid crystal projection apparatus is provided with such image synthesizing means having a reduced number of parts and an improved assembly accuracy. | 09-17-2009 |
| 20090231499 | LIQUID CRYSTAL DEVICE AND PROJECTOR - A liquid crystal device includes a liquid crystal panel, a pair of polarizers and a phase plate. The phase plate is formed by a supply direction of an inorganic material to the substrate surface set such that a ratio of a front phase difference, which is produced when light is incident along a normal direction of the phase plate, and a first phase difference, which is produced when light is incident along a first direction different from the normal direction, falls within a predetermined range. | 09-17-2009 |
| 20090244412 | OPTICAL COMPENSATOR, LIQUID CRYSTAL DISPLAY SYSTEM, AND PROJECTION TYPE LIQUID CRYSTAL DISPLAY SYSTEM AND PRODUCTION METHOD AND ADJUSTMENT METHOD OF DISPLAY SYSTEM - An optical compensator handling higher luminance, capable of achieving a higher contrast ratio while suppressing variation of the contrast ratio, and able to achieve higher definition and longer service life, a liquid crystal display system and a projection type liquid crystal display system using this optical compensator, and a production method and an adjustment method of the display systems are provided. The liquid crystal display system has a liquid crystal device optically modulating an emitted light beam by a liquid crystal layer vertically aligning liquid crystal molecules having negative dielectric constant anisotropies and having a pretilt in a direction vertical to a main surface of a substrate, a first polarizer arranged on an incident side of the liquid crystal device, a second polarizer arranged on an emission side of the liquid crystal device, and an optical compensator arranged in a light path between the emission side of the first polarizer and the incident side of the second polarizer. The optical compensator has at least two compensation layers, the compensation layers being bonded to each other so that the phase difference values and in-plane optical axis directions are different from each other. | 10-01-2009 |
| 20090310042 | Illumination system and method with efficient polarization recovery - Light provided by a light-reflective light source ( | 12-17-2009 |
| 20100020253 | PROJECTION DISPLAY APPARATUS - A projection display apparatus is provided with a liquid crystal panel, and first to third polarizing layers are arranged on an optical path of light. The transmission axis of the first polarizing layer and the transmission axis of the second polarizing layer orthogonally intersect with each other. The transmission axis of the second polarizing layer and the transmission axis of the third polarizing layer are parallel to each other. The first compensation layer compensates a phase difference generated due to pre-tilt angle on the entering side of the liquid crystal panel. The second compensation layer compensates a phase difference generated due to a pre-tilt angle on the outgoing side of the liquid crystal panel. The third compensation layer compensates a phase difference generated due to deviation between the polarization axis of the light entering the third polarizing layer and the transmission axis of the third polarizing layer. | 01-28-2010 |
| 20100073585 | Projection type display device - A projection type display device is provided to display high quality images. In the device, a WB-PBSW | 03-25-2010 |
| 20100079688 | OPTICAL COMPONENT ADJUSTMENT MECHANISM, LIQUID CRYSTAL DISPLAY AND PROJECTION DISPLAY - This optical component adjustment mechanism includes support frame | 04-01-2010 |
| 20100134705 | Glass Polarizer and Manufacturing Method Thereof - A glass polarizer having an excellent transmittance and extinction ratio with respect to light in the visible light range including blue using silver halide containing glass as a starting material is provided. | 06-03-2010 |
| 20100149443 | POLARIZING ELEMENT, METHOD FOR PRODUCING SAME, LIQUID CRYSTAL DEVICE, ELECTRONIC APPARATUS, AND PROJECTION DISPLAY - A polarizing element includes a substrate; a plurality of protruded threads formed on one of surfaces of the substrate in a rough stripe pattern when viewed two-dimensionally, each of the protruded threads having a side surface forming a slope inclined with respect to the one surface of the substrate; a plurality of metal thin wires each formed on the slope of the each protruded thread so as to be cantilever-supported by the slope and each extended in an extension direction of the protruded thread; and a protection film covering the protruded threads and the metal thin wires. | 06-17-2010 |
| 20100165220 | LIQUID CRYSTAL DISPLAY DEVICE AND PROJECTOR - A liquid crystal display device includes: a liquid crystal panel having a liquid crystal device and a dust-proof plate disposed on at least one of a light entrance side and a light exit side of the liquid crystal device; and a first polarization filter disposed so as to be opposed to the liquid crystal panel across the dust-proof plate, wherein a direction of an absorption axis of the first polarization filter and a direction of an optical axis of the dust-proof plate are perpendicular to each other, and the dust-proof plate is made of a positive uniaxial crystalline material, and satisfies a following relational expression denoting a refractive index difference with respect to two directions perpendicular to a system optical axis as Δn, a thickness in a system optical axis direction as d, and a wavelength to be used as λ, and using an integer N: | 07-01-2010 |
| 20100177253 | COHERENT IMAGING METHOD OF LASER PROJECTION AND APPARATUS THEREOF - A coherent light source system is presented. The system comprises at least one coherent light emitter producing a coherent light beam, a focusing lens unit, and a beam shaper unit, the beam shaper unit being accommodated between the coherent light emitter and the collimating lens unit being in a front focal plane of the focusing lens unit, thereby providing a substantially uniform profile and high-degree collimation at a desired plane in an optical path of light propagation. | 07-15-2010 |
| 20100195005 | Projection display apparatus and display method using the same - A projection display apparatus has a beam controller provided on the optical axis of an optically-modulated linearly-polarized beam, to allow the beam to travel therethrough to reach a screen or cut off the beam, under control by a control signal. The controller, has driving zones on which the beam is incident. The zones are provided in a direction corresponding to a vertical scanning direction of pixels of a liquid crystal display device installed in the display apparatus, for optically modulating a linearly polarized beam. The controller is driven per driving zone in a specific zone order at a timing of vertical scanning of the pixels under control by the control signal generated based on a vertical synchronization signal detected from the input signal. The optically modulated beam is allowed to travel through the controller or cut off when incident on the zones at the timing of the vertical scanning. | 08-05-2010 |
| 20100214500 | OPTICAL UNIT AND PROJECTION-TYPE LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME - An optical unit is provided which includes inorganic polarizing plates used as output polarizing plates. Even if a defect such as a flaw or a pinhole is present in the polarizing plate, the defect is not projected on the display screen. Instead of output polarizing plates for liquid crystal panels for R, G, and B, a common polarizing plate for R, G, and B is disposed on the output side of a photosynthesis prism. A color selective polarization rotator which rotates the polarization of light of a selected wavelength band is disposed between the photosynthesis prism and the common polarizing plate. Or, alternatively, instead of output polarizing plates for R and G to be individually disposed along with an output polarizing plate for B, a common output polarizing plate for R and G is disposed on the output side of the photosynthesis prism. | 08-26-2010 |
| 20100225832 | POLARIZING ELEMENT AND METHOD FOR MANUFACTURING THE SAME, PROJECTION TYPE DISPLAY, LIQUID CRYSTAL DEVICE, AND ELECTRONIC APPARATUS - A polarizing element includes a substrate with protruded threads, and metal thin wires provided on the protruded threads. Each metal thin wire includes a first thin wire provided to a first side surface of the protruded thread and a second thin wire provided to a second side surface of the protruded thread. Each first thin wire has a first volume. Each second thin wire has a second volume. Each metal thin wire has a third volume which is the sum of the first and second volumes. As a distance from one end of the substrate increases, the volume of each first thin wire decreases and the volume of each second thin wire increases so that the third volume is maintained within a predetermined range. | 09-09-2010 |
| 20100245688 | PROJECTOR - A projector includes: an illumination device that emits an illumination light beam; a liquid crystal device that modulates the illumination light beam from the illumination device based on image information; a projection optical system that projects light modulated by the liquid crystal device; and at least one polarizing member that is disposed on a light exit side of the liquid crystal device and has in order a light-transmissive substrate, a pressure-sensitive adhesive layer, a KE polarizer, an adhesive layer, and a support layer, the polarizing member being positioned so that the adhesive layer is closer to a light exit side than is the KE polarizer. | 09-30-2010 |
| 20100245689 | PROJECTOR - A projector includes: a light modulation device that changes the polarization state of incident light; and a polarization maintaining reflector provided along the outer edge of an effective pixel area in the light modulation device, the polarization maintaining reflector having a flat surface that reflects the incident light with its polarization state maintained. | 09-30-2010 |
| 20110019112 | Projection System with Enhanced Brightness - A digital display system, such as a projection system, utilizing image forming elements such as LCDs or other light valves with means to enhance display brightness which may include the use of at least two light sources, means to split light from the light sources into two polarizations, means to rotate the polarization of the light of one polarization so that it matches the polarization of the remainder of the light, all of the light then being directed towards the image forming elements, and the use of novel optical elements to collect a majority of the light emitted by the light sources and to re-direct that light so that it can be used by the display system. | 01-27-2011 |
| 20110109820 | PHASE-COMPENSATED THIN-FILM BEAM COMBINER - A beam combiner for combining a plurality of light beams onto an optical path, comprising: a first dichroic element having a dichroic coating that is disposed to transmit light of a first wavelength band along the optical path and to reflect light of a second wavelength band onto the optical path, and a second dichroic element having a dichroic coating that is disposed to transmit the light of the first and second wavelength bands along the optical path and to reflect light of a third wavelength band onto the optical path. The beam combiner further includes a phase difference compensation multilayer thin-film stack that provides at least one reflectance edge transition that lies outside any of the first, second, and third wavelength bands and which provides compensation for an accumulated phase difference for polarization states of the transiting in at least one of the first, second, and third wavelength bands. | 05-12-2011 |
| 20110228178 | POLARIZATION BEAM SPLITTER AND OPTICAL SYSTEM - A polarization beam splitter (PBS) includes a first prism, a second prism, an alignment layer, and a cholesteric liquid crystal (CLC) layer. The first prism has two first surfaces adjacent to each other and a first slanted surface that forms a first included angle with the two first surfaces, respectively. The second prism has two second surfaces adjacent to each other and a second slanted surface that forms a second included angle with the two second surfaces, respectively. The second slanted surface is opposite to the first slanted surface. The alignment layer is disposed on the first slanted surface of the first prism. The CLC layer is disposed between the alignment layer and the second slanted surface of the second prism. | 09-22-2011 |
| 20110234928 | PROJECTOR - A projector includes: an illuminator that outputs illumination light; a light modulator including a liquid crystal panel and a structural birefringent polarization separation element having a polarization separation surface inclined away from a central axis of the illumination light, the light modulator modulating the illumination light from the illuminator; and a projection system that projects the light modulated by the light modulator, wherein the illumination light outputted from the illuminator has an angular distribution in a first direction, which is perpendicular to the central axis of the illumination light, smaller than the angular distribution in a second direction, which is perpendicular to the first direction and the central axis of the illumination light, and the polarization separation surface of the structural birefringent polarization separation element has a structure that is not periodic along the first direction but is periodic along the second direction. | 09-29-2011 |
| 20110279742 | PROJECTOR - A projector capable of increasing in the contrast by reducing the amount of leakage of light due to reflection of light on the surface of a retarder is to be provided. A retarder is placed and tilted in a direction so that the following conditional expression is satisfied, denoting a distance between a point A where the normal drawn from the center of a substrate plane of the retarder and a substrate plane of a polarizing beam splitter intersect and a point C where the substrate plane of the polarizing beam splitter and the optical axis of a projection system as AC, and a distance between a point B where the substrate plane of the polarizing beam splitter and the system optical axis intersect and the point C as BC: AC>BC. | 11-17-2011 |
| 20110292307 | PROJECTION APPARATUS THAT PROPERLY REDUCES FLICKER - A projection apparatus that provides flicker reduction according to the cause of flicker, to thereby properly reduce flicker without unnecessarily bringing about characteristic degradation is disclosed. Light for projecting a projection image onto a projection surface is output from a light source, and separated into light beams of a plurality of colors. Images corresponding to the light beams of the plurality of colors are formed on display units. The light beams of the plurality of colors having passed through the display units are synthesized and projected onto the projection surface. Fluctuations in the light quantity of the light beams of the plurality of colors having passed through the display units and yet to be input to the color synthesis unit are detected. Detection results are analyzed, and it is determined whether flicker caused by the display units or flicker caused by the light source is occurring in the projection image. | 12-01-2011 |
| 20120099031 | PROJECTOR AND OPTICAL UNIT - A projector includes a plurality of reflective liquid crystal panels (for example, a red liquid crystal panel, a green liquid crystal panel, and a blue liquid crystal panel). The film thickness of an ITO film that forms a common electrode of the blue liquid crystal panel is smaller than the film thickness of an ITO film that forms a common electrode of any one of the red liquid crystal panel and the green liquid crystal panel. The film thicknesses of the ITO films that form the common electrodes of the red liquid crystal panel and the green liquid crystal panel are the same. | 04-26-2012 |
| 20120229716 | PROJECTION TYPE DISPLAY APPARATUS - [Task] It is to provide a projection type display apparatus which enhances the contrast performance while minimizing a reduction in the brightness by blocking a light beam which would decrease the contrast through the use of diaphragms provided in both of an illumination optical system and a projection lens. | 09-13-2012 |
| 20120257124 | Display Apparatus for Displaying Multiple Images of Viewing Angles - A display apparatus for displaying multiple images of viewing angles is disclosed. The display apparatus comprises a display screen and a projector. The projector has at least one light source module, an optical component module, a first light modulator, a second light modulator and a projection lens. The light source module generates a light beam, which is divided into a first portion light and a second portion light after passing through the optical component module. The first portion light and the second portion light are respectively received by the first light modulator and the second light modulator, and transformed into the image of the first viewing angle image and the second viewing angle respectively. Then, the image of the first viewing angle and the second viewing angle are projected to the display screen by the projection lens simultaneously. | 10-11-2012 |
| 20120320289 | Liquid Crystal Display Device and Projector - A liquid crystal display device includes: a liquid crystal panel having a liquid crystal device and a dust-proof plate disposed on at least one of a light entrance side and a light exit side of the liquid crystal device; and a first polarization filter disposed so as to be opposed to the liquid crystal panel across the dust-proof plate, wherein a direction of an absorption axis of the first polarization filter and a direction of an optical axis of the dust-proof plate are perpendicular to each other, and the dust-proof plate is made of a positive uniaxial crystalline material, and satisfies a following relational expression denoting a refractive index difference with respect to two directions perpendicular to a system optical axis as Δn, a thickness in a system optical axis direction as d, and a wavelength to be used as λ, and using an integer N: | 12-20-2012 |
| 20130002972 | Lighting Device and Projector - A lighting device includes a first light source, a second light source of a light-emitting surface area larger than that of the first light source, first light-converging optics configured to converge light from the first light source into a first light beam, second light-converging optics configured to converge light from the second light source into a second light beam, and an illumination optical system configured to make the first light beam and the second light beam into illumination light, with a f-number of the illumination optical system for the second light beam being lower than a f-number of the illumination optical system for the first light beam. | 01-03-2013 |
| 20130010215 | ILLUMINATION OPTICAL SYSTEM AND IMAGE DISPLAY APPARATUS - An illumination optical system includes a two-dimensional laser-array light source including a plurality of laser light sources arranged in a two-dimensional array on a plane; an integrator optical system configured to superpose incident light and emit the light to an irradiated surface; a plurality of first lenses disposed parallel to the plane and configured to superpose beams from the two-dimensional laser-array light source in a first axis direction and emit the beams to the integrator optical system while limiting a divergence angle in the first axis direction of the two-dimensional array; and a plurality of second lenses disposed rearward of the first lenses and configured to superpose the beams from the two-dimensional laser-array light source in a second axis direction orthogonal to the first axis direction and emit the beams to the integrator optical system while limiting a divergence angle in the second axis direction. | 01-10-2013 |
| 20130057787 | LIQUID CRYSTAL DISPLAY UNIT AND PROJECTION-TYPE DISPLAY DEVICE - There is provided a liquid crystal display unit including a liquid crystal panel for modulating light; a light shielding plate for controlling light not to be incident on areas other than an effective pixel area of the liquid crystal panel; an optical compensation element arranged at sides on which the light is incident in the liquid crystal panel and the light shielding plate; and an optical compensation element holder for holding the optical compensation element to be spaced from the light shielding plate and not to contact other members. | 03-07-2013 |
| 20130063671 | COMPACT ILLUMINATOR - The present disclosure relates generally to an optical element, a light projector that includes the optical element, and an image projector that includes the optical element. In particular, the optical element provides an improved uniformity of light by homogenizing the light with lenslet arrays, such as “fly-eye arrays” (FEA). The FEA is positioned to homogenize an unpolarized combined light before the light is converted to a single polarization state. | 03-14-2013 |
| 20130155336 | Projector - Provided is a projector capable of suppressing deterioration of a portion of a projection portion irradiated with a laser beam while improving brightness. This projector is formed to deviate optical axes of laser beams emitted from a plurality of laser beam generation portions respectively from each other so that the laser beams emitted from the plurality of laser beam generation portions respectively do not concentrate on one point of a projection portion. | 06-20-2013 |
| 20130169893 | TILTED DICHROIC COLOR COMBINER II - The disclosure generally relates to color combiners, and in particular color combiners useful in small size format projectors such as pocket projectors. The disclosed color combiners include a tilted dichroic plate having at least two reflectors configured with light collection optics to combine at least two colors of light. | 07-04-2013 |
| 20130188101 | THREE DIMENSIONAL IMAGE PROJECTOR WITH SINGLE MODULATOR - A system is provided projecting a three-dimensional image. The system includes a first light source, the first light source emitting light in a first direction. A second light source is provided, the second light source emitting light in a second direction, the second direction being opposite the first direction. A beam splitter device is disposed between the first light source and the second light source to receive light from the first light source and the second light source, the beam splitter device being arranged to rotate about an axis. An LCoS image device is disposed adjacent the beam splitter device, the LCoS image device having an image surface arranged substantially perpendicular to the first direction and the second direction. | 07-25-2013 |
| 20130188102 | THREE DIMENSIONAL IMAGE PROJECTOR WITH SINGLE MODULATOR - A method of projecting a three-dimensional image is provided. The method includes providing a first light source, the first light source emitting light at a first polarization. A second light source is provided opposite the first light source, the second light source emitting light at a second polarization. A liquid crystal on silicone (LCoS) image device is provided. A beam splitter device is provided between the first light source and the second light source adjacent the LCoS image device. The beam splitter device is rotated. A first light is emitted from the first light source. The first light is reflected with the beam splitter device onto the LCoS image device. A second light is emitted from the second light source after the first light is emitted. The second light is reflected with the beam splitter device onto the LCoS image device. | 07-25-2013 |
| 20130229586 | POLARIZATION CONTROLLER, PROJECTOR SYSTEM, POLARIZATION CONTROL METHOD AND IMAGE CONTROL METHOD - A polarization controller adapted to output respective projection lights for a right-eye image and a left-eye image that are incident from a projector to a screen in different polarization directions, includes: a liquid crystal device adapted to change the polarization directions of the projection lights; and a controller adapted to control the liquid crystal device so that the respective projection lights for the right-eye image and the left-eye image have different polarization directions, wherein the controller performs control for mirror-reversing the polarization directions of the projection lights in the liquid crystal device according to a control signal indicating whether the projector performs mirror reversal of the right-eye image and the left-eye image, input from the projector. | 09-05-2013 |
| 20130235284 | Stereoscopic projection systems and methods for employing spatial multiplexing at an intermediate image plane - Proposed are various embodiments of projection systems that generally provide stereoscopic images. The projection systems act to split a spatially separated image in a stereoscopic image frame and superimpose the left- and right-eye images on a projection screen with orthogonal polarization states. The embodiments are generally well suited to liquid crystal polarization based projection systems and may use advanced polarization control. | 09-12-2013 |
| 20130242210 | PROJECTOR - A projector includes a light modulation unit including a liquid crystal device that modulates illumination light to form image light and a light exiting-side polarizer that causes the image light from the liquid crystal device to exit as linearly polarized light, a first retardation film that changes the polarization state of the image light from the light exiting-side polarizer into circular polarization or elliptical polarization, a polarization switching liquid crystal panel that switches the polarization state of the image light from the first retardation film in accordance with a control signal, a second retardation film that changes the polarization state of the image light from the polarization switching liquid crystal panel into linear polarization, and a birefringent substrate that selectively refracts a light component polarized in a direction corresponding to a specific switching state of the polarization switching liquid crystal panel among the image light from the second retardation film. | 09-19-2013 |
| 20130300951 | PROJECTOR - A projector includes: a display device which modulates illumination light; a projection lens which projects modulation light produced by the display device; and a holding device which has a holder member supporting the display device, a frame member supporting the projection lens and functions as a base capable of supporting the holder member, and an expanding and contracting member disposed between the frame member and the display device, wherein a temperature coefficient for the expansion and contraction of the expanding and contracting member in the direction of the optical axis of the projection lens corresponds to a temperature coefficient for the increase and decrease of the focal distance of the projection lens. | 11-14-2013 |
| 20140002756 | Projector | 01-02-2014 |
| 20140152908 | ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS - A microlens array substrate is provided on which a plurality of microlenses is arranged, and the collection efficiency of a first microlens is lower than the collection efficiency of a second microlens positioned further to the outside edge sides than the first microlens. | 06-05-2014 |
| 20150109538 | PROJECTOR - Since a relay optical system includes double gauss lenses and pairs of meniscus lenses disposed so as to be convex toward the double gauss lenses, it is possible to sufficiently minimize the occurrence of aberration from dimming light valves to color modulation light valves, to maintain an image formation state with high performance, and further to form a favorable image. | 04-23-2015 |
| 20150355474 | A Method for Reducing Speckle - According to the present invention there is provided a method of reducing speckle effects in a projected image which is displayed on a display surface, comprising the steps of transmitting an input light beam to a first interferometer, generating a plurality of primary transmit beams at the first interferometer using the input light beam, using the plurality of primary transmit beams to generate interference fringes at a display surface. | 12-10-2015 |
| 20160054575 | MINIMIZED-THICKNESS ANGULAR SCANNER OF ELECTROMAGNETIC RADIATION - A minimized-thickness angular scanner of electromagnetic radiation includes an optical sandwich having a two-dimensional (2D) image source, and a scanning assembly that includes a first optic and a second optic, wherein at least one of the first optic and the second optic are oscillatorily translating. Translation of the optics provides for generation of a three-dimensional (3D) image, while the optical sandwich design provides for compact implementation of 3D displays. | 02-25-2016 |
| 20160381352 | STEREOSCOPIC 3D PROJECTION SYSTEM WITH IMPROVED LEVEL OF OPTICAL LIGHT EFFICIENCY - A time-multiplexed stereoscopic 3d projection system including a beam-splitting element to split the randomly polarized image-beam generated by a single-lens projector into one primary image-beam, possessing a first state of linear polarization, and two secondary image-beams, both possessing a second state of linear polarization. The polarization states are mutually orthogonal. The primary and secondary image-beams recombine to form a complete image on the surface of a polarization-preserving projection-screen. There are polarization modulators that modulate the first and second states of linear polarization between a left and right circular polarization state. There is a contrast enhancement film in the optical-path of the primary or secondary image-beams located between the polarization modulator and the projection-screen. The contrast enhancement film comprises a stack of at least three uniaxially stretched retardation-films which perturb the circular polarization state of said image-beams and which possess an in-plane retardation value substantially equal to 140 nm, 270 nm, or 540 nm. | 12-29-2016 |
