Class / Patent application number | Description | Number of patent applications / Date published |
349009000 | Having light separated into S and P polarization | 55 |
20080252801 | LCD APPARTUS - An LCD panel ( | 10-16-2008 |
20080316377 | LIQUID CRYSTAL PROJECTION APPARATUS - A liquid crystal projection apparatus includes an illumination system, at least a light-transforming module and a projection lens. The illumination system provides a light beam having light polarized in a first direction and in a second direction. The light-transforming module and the projection lens are both disposed on a transmission path of the light beam. The light-transforming module includes a transmissive liquid crystal display (LCD) panel, a plurality of first polarizers and at least a second polarizer. The light polarized in a first direction passes through the first polarizers disposed at a side of the transmissive LCD panel, and the light polarized in a second direction is partially blocked by each of the first polarizers. The light polarized in the second direction passes through the second polarizer disposed at another side of the transmissive LCD panel, and the light polarized in the first direction is blocked by the second polarizer. | 12-25-2008 |
20090002579 | Near Halfwave Retarder For Contrast Compensation - Contrast compensation for a liquid crystal display projection system is provided with a trim retarder that includes a single-layer retarder element that has an in-plane retardance that is shifted from a zero-order half-wave at a predetermined wavelength by a predetermined amount. This near half-wave plate provides similar contrast compensation and azimuthal angle sensitivity to conventional relatively low-magnitude trim retarders, yet is readily fabricated with inorganic birefringent crystals with a manageable thickness tolerance. | 01-01-2009 |
20090015734 | PROJECTION SYSTEM WITH POLARIZATION DIRECTION ROTATING MEMBER - An exemplary projection system includes a light source unit, a polarization direction rotating member, a polarization direction restoration polarizer, an LCD panel, and a projection lens. The light source unit is configured for emitting polarized light with a first polarization direction along an axis. The polarization direction rotating member includes a solid body and a through hole defined in the solid body. The polarized light has a first portion incident on the solid body and a second portion passing through the through hole. The polarization direction rotating member is configured for rotating the first polarization direction of the first portion to a second polarization direction and allowing the second portion to pass the through hole with the first polarization direction kept unchanged. The polarization direction restoration polarizer is configured for changing the second polarization direction of the first portion to the first polarization direction. | 01-15-2009 |
20090086112 | PROJECTION TYPE LIQUID CRYSTAL DISPLAY AND COMPENSATION PLATE - A projection type liquid crystal display includes a light source, a reflective liquid crystal element modulating light from the light source based on an image signal, a polarization beam splitter disposed on an optical path between the light source and the liquid crystal element, a compensation plate disposed on an optical path between the liquid crystal element and the beam splitter, and projection means for projecting light impinging thereon through an optical path extending through the compensation plate and the beam splitter upon a screen, the light impinging upon the projection means after being modulated by the liquid crystal element. The compensation plate has in-plane retardation Re being one-fourth the wavelength of the incident light and retardation RthL in the thickness direction which is equal to retardation RthC in the thickness direction of the liquid crystal element in absolute value and is the reverse of the retardation RthC in polarity. | 04-02-2009 |
20090195714 | COLOR SWITCHING DEVICE - A liquid crystal color switching device for use in a non-polarization projection device is disclosed. The color switching device comprises a PBS and two switchable phase retarder assemblies, respectively disposed at two outlets of the PBS, wherein each of the switchable phase retarder assemblies comprises at least one liquid crystal layer and at least one dichroic coating layer. When a white light with S- and P-polarizations enters the inlet of the PBS, the white light will be divided into two orthogonal polarized lights and emitted from two outlets of the PBS. After being modulated respectively by the switchable phase retarder assemblies of the two outlets, the two switched polarized lights will be combined by the PBS into a non-polarized light and be emitted from a third outlet of the PBS. | 08-06-2009 |
20090256976 | 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 second orientation directions on first and second substrates are rotated by “60±α” and “60±β” degrees in first and second rotating directions starting from a reference direction, respectively. The first and second rotating directions are mutually opposite, the reference direction is parallel to the first and second substrates and within in an angular range defined by a central angle plus ±5 degrees wherein the central angle is ±45 degrees from an oscillation direction of incident polarized light, and a relationship of |α|+|β|≦10 (α and β are zero or positive integers) is fulfilled. | 10-15-2009 |
20090268109 | Digital Projection System - A light modulation assembly and an image projector utilizing a plurality of such light modulation assemblies are disclosed. The light modulation assembly includes an optical element, a pre-polarization filter, an image modulator, and an analyzer polarization filter. The optical element has an input port for receiving a light beam. The optical element directs the light beam onto the pre-polarization filter that removes light having a linear polarization in a first direction. The light leaving the pre-polarization filter illuminates the image modulator. The light leaving the image modulator is filtered by the analyzer polarization filter to remove light having a linear polarization with a predetermined direction relative to the first direction. The light leaving the analyzer polarization filter exits the optical element through an output port. A plurality of such assemblies can be combined with a beam splitting assembly to provide an image projector. | 10-29-2009 |
20090279003 | LIQUID-CRYSTAL PROJECTION SYSTEM - A liquid-crystal projection system includes a light source emitting unpolarized light, a polarizing beam splitter, a single liquid crystal panel receiving polarized light P from said polarizing be m splitter, a projection lens, and a pre-polarizer placed between said light source and said polarizing beam splitter for polarizing said unpolarized light. The pre-polarizer includes a plurality of prisms combined together in succession, in which a plurality of inclined planes formed and connected continuously with each other, and a polarizing beam splitting film attached to said inclined plane configuring a polarizing beam splitting surface. | 11-12-2009 |
20090303398 | REFLECTIVE LIQUID CRYSTAL DISPLAY APPARATUS - At least one exemplary embodiment is directed to a reflective liquid crystal display apparatus which includes a polarization beam splitter having a polarization split film used as both a polarizer and an analyzer; a reflective liquid crystal display device; a quarter wave plate; and a projection optical system; where the absolute value of phase difference of diffracted light generated by the reflective liquid crystal display device in a black display state is reduced by the phase difference of the quarter wave plate, and thus the amount of stray light of the diffracted light guided from the polarizing beam splitter to the projection optical system decreases. | 12-10-2009 |
20090303399 | REFLECTIVE LIQUID CRYSTAL DISPLAY APPARATUS - At least one exemplary embodiment is directed to a reflective liquid crystal display apparatus which includes a polarization beam splitter having a polarization split film used as both a polarizer and an analyzer; a reflective liquid crystal display device; a quarter wave plate; and a projection optical system; where the absolute value of phase difference of diffracted light generated by the reflective liquid crystal display device in a black display state is reduced by the phase difference of the quarter wave plate, and thus the amount of stray light of the diffracted light guided from the polarizing beam splitter to the projection optical system decreases. | 12-10-2009 |
20090310043 | REFLECTIVE LIQUID CRYSTAL DISPLAY APPARATUS - At least one exemplary embodiment is directed to a reflective liquid crystal display apparatus which includes a polarization beam splitter having a polarization split film used as both a polarizer and an analyzer; a reflective liquid crystal display device; a quarter wave plate; and a projection optical system; where the absolute value of phase difference of diffracted light generated by the reflective liquid crystal display device in a black display state is reduced by the phase difference of the quarter wave plate, and thus the amount of stray light of the diffracted light guided from the polarizing beam splitter to the projection optical system decreases. | 12-17-2009 |
20100128186 | POLARIZATION CONVERSION OPTICAL SYSTEM AND LIQUID CRYSTAL PROJECTION APPARATUS INCLUDING THE SAME - A polarization converting optical system and a liquid crystal projection apparatus including the polarization conversion optical system are provided. The polarization conversion optical system includes a light incident surface; a light exit surface having first and second light exit regions; a half-wave plate disposed on the first light exit region; and a plurality of polarization separating surfaces, between the light incident surface and the light exit surface, which divide light into first S-polarization and P-polarization components and second S-polarization and P-polarization components, deviating the second S-polarization component and the first P-polarization component in a direction inclined with respect to an optical axis, and emitting the S-polarization components through the first light exit region and emit the P-polarization components through the second light exit region. | 05-27-2010 |
20100141856 | Stereoscopic projection systems 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. | 06-10-2010 |
20100171890 | PROJECTION STEREOSCOPIC DISPLAY - A projection stereoscopic display includes: a stereoscopic display optical system receiving linearly polarized light from the light source and displaying a first picture and a second picture both having binocular parallax by linearly polarized light with polarization directions orthogonal to each other, in which the stereoscopic display optical system includes: a reflective liquid crystal panel modulating and reflecting linearly polarized light from the light source in response to a picture signal, a first polarizing device splitting the first picture from reflected light from the reflective liquid crystal panel, a retardation device converting the polarization direction of the first picture into a direction orthogonal thereto, and a second polarizing device splitting the second picture from reflected light from the reflective liquid crystal panel, and superimposing the second picture on the first picture of which the polarization direction is converted by the retardation device. | 07-08-2010 |
20100188590 | LAMINATED THIN FILM, PHASE PLATE, AND REFLECTIVE LIQUID CRYSTAL DISPLAY APPARATUS - Provided is a phase plate having high phase compensation effect with low manufacturing cost, which is a device including a substrate and a thin film including laminated thin films of two or more types having different refractive indexes. The device performs phase compensation for an oblique incident polarized light ray, by using interference due to a high refractive index thin film and a low refractive index thin film. | 07-29-2010 |
20100195006 | PROJECTION DISPLAY APPARATUS - A projection display apparatus includes a light source configured to emit light, at least one reflective liquid crystal device configured to generate an image by modulating a polarization of the light emitted from the light source and reflecting the light, an imaging lens configured to form a real image of the image generated by the reflective liquid crystal device, a quarter-wave plate disposed between the reflective liquid crystal device and the imaging lens, an image splitter configured to include at least one reflecting plane and spatially split the real image into at least two split real images by reflecting the real image on the reflecting plane, at least two projection lenses configured to form the split real images again on a screen, and a phase difference corrector configured to correct a phase difference between a p-polarized light and an s-polarized light generated by the reflecting plane. | 08-05-2010 |
20100245690 | POLARIZATION CONVERSION DEVICE, POLARIZED ILLUMINATION OPTICAL DEVICE, AND LIQUID CRYSTAL PROJECTOR - Polarizing split layers | 09-30-2010 |
20100245691 | POLARIZATION CONVERSION DEVICE, POLARIZED ILLUMINATION OPTICAL DEVICE, AND LIQUID CRYSTAL PROJECTOR - A polarizing split layer | 09-30-2010 |
20100245692 | LAMINATED WAVE PLATE, OPTICAL PICKUP DEVICE, POLARIZATION CONVERTER, AND PROJECTION DISPLAY APPARATUS - A laminated wave plate includes a first wave plate with a phase difference of Γ | 09-30-2010 |
20100321598 | INTEGRATED SINGLE PANEL PROJECTION ENGINE - The present invention discloses an integrated single-panel projection engine ( | 12-23-2010 |
20100328560 | PROJECTION-TYPE DISPLAY APPARATUS - Provided are an illumination optical system allowing light beams to be condensed and enter an illumination area at different angles from each other, color separating elements that separate colors of the light beams from the illumination optical systems, liquid crystal light valves that modulate the color lights to form image light for the right and the left eyes, a color combining element that combines the color light beams, a wavelength-selective polarization rotating element that rotates the polarization direction of a predetermined color light so as to align the polarization direction with that of a light beam of another color, and a projection lens that magnifies and projects images. The liquid crystal light valves are provided with an incident side microlens array that causes the light beams for the right and the left eyes to pass respectively through the right and the left eye image pixels, and an exit side microlens array that condenses the light that has passed through the pixels. The projection lens is provided with a polarized light separating element that causes the polarization directions of image light for the right and the left eyes to be orthogonal to each other. Using one projection-type display apparatus, a highly efficient stereoscopic image can be displayed with little flicker and cross talk of image light for the right eye and for the left eye. | 12-30-2010 |
20100328561 | Stereoscopic projection system employing spatial multiplexing at an intermediate image plane - Projection systems and methods for providing stereoscopic images viewed through passive polarizing eyewear. The systems relate to projectors that create left and right eye images simultaneously and often as side-by-side images on the image modulator. The systems act to superimpose the spatially separated images on a projection screen with alternate polarization states. The embodiments are best suited to liquid crystal polarization based projection systems and use advanced polarization control. | 12-30-2010 |
20110043712 | PROJECTOR - A projector includes: a light source; a polarization conversion unit that converts the light flux from the light source into polarized light having a plane of polarization parallel to a first direction; a color separation/light guiding system including a separating surface and at least one optical-path deflecting mirror; and a plurality of light modulators, wherein the separating surface is disposed in such a way that the plane of incidence of the polarized light with respect to the separating surface is perpendicular to the first direction, and the at least one optical-path deflecting mirror is disposed in such a way that the plane of incidence of the corresponding polarized light flux from the separating surface with respect to the optical-path deflecting mirror is parallel to the first direction. | 02-24-2011 |
20110080534 | LIGHT COMPENSATION SCHEME, OPTICAL MACHINE DEVICE, DISPLAY SYSTEM AND METHOD FOR LIGHT COMPENSATION - A light compensation scheme, an optical machine device, a display system and a method for light compensation are disclosed herein. The light compensation scheme includes a detector for inspecting a data related to a luminous flux of each of different color beams, and a controller for selectively adjusting anytime a luminosity of at least one of a plurality of pointolites and/or the transmittances of at least one part of liquid crystals disposed within a liquid crystal display panel, based on the inspected data. | 04-07-2011 |
20110228179 | IMAGE DISPLAY APPARATUS - An image display apparatus includes a first optical modulation device and a second optical modulation device configured to emit linearly polarized lights whose polarization directions are perpendicular to each other, first pixels and second pixels are arranged in each of the first optical modulation device and second optical modulation device, retardation layers are disposed on the light emission side of the first pixels or second pixels, the retardation layers configured to convert one linearly polarized light of the linearly polarized lights into the other linearly polarized light. Either arrangements of the first pixels and the second pixels or arrangements of the retardation layers is set so as to be the same in the first optical modulation device and the second optical modulation device, and the other is set so as to be the reverse in the first optical modulation device and the second optical modulation device. | 09-22-2011 |
20110261274 | STRUCTURE OF PICO PROJECTOR - A pico projector includes a light-emitting diode module, collimators, a lens array, magnification lenses, a reflection mirror, a polarizing beam splitter, an LCoS (light crystal on silicon) panel, and an image lens module, wherein the light-emitting diode module emits red, green, and blue lights. The collimators convert light from the light-emitting diode module into collimated light. The lens array homogenizes the collimated light. The magnification lenses magnify the homogenized light from the lens array with a predetermined ratio to be projected onto the LCoS panel. The reflection mirror changes direction of the light path. The polarizing beam splitter allows for transmission of a horizontal polarization light component and reflects a vertical polarization light component. The LCoS panel reflects and modulates the light to form an optic signal. The image lens module includes, in sequence, positive, positive, negative, positive, and positive lenses to project the optical signal to a screen. | 10-27-2011 |
20110273633 | PROJECTION SYSTEM AND METHOD FOR ALTERNATELY OUTPUTTING DIFFERENT POLARIZED IMAGE LIGHT SOURCES - A projection system for alternately outputting different polarized image light sources includes a polarizing beam splitting module, an image display module and a light polarization switch module. The polarizing beam splitting module has at least one polarizing beam splitting element for intermittently receiving a plurality of input light sources according to different time sequences. The image display module has at least one reflective image display panel disposed beside a first side of the polarizing beam splitting element. The light polarization switch module has at least one transmission LCD light valve disposed beside a second side of the polarizing beam splitting element. Therefore, the image light sources with P polarization and the image light sources with S polarization can be intermittently and alternatively projected from the projection lens onto the surface of the object by switching the transmission LCD light valve to ON/OFF state according to different time sequences. | 11-10-2011 |
20110279743 | REFLECTIVE LIQUID CRYSTAL PROJECTOR - A PBS sheet is curved into a partially cylindrical shape so as to be concave or convex toward a panel surface along a central axis which is perpendicular to both an incident light axis of illumination light and a reflection light axis perpendicular to the incident light axis. The illumination light from a light source is converted into s-polarized light by a polarization converting system, and energy distribution thereof is made uniform by a rod integrator. Then, the illumination light is sequentially split into three color lights, R, G, and B, by a color wheel. The illumination light is approximately totally reflected on the PBS sheet, and applied toward a liquid crystal display panel. The illumination light having been reflected on the PBS sheet illuminates the panel surface with neither too large nor too small illumination range. The R, G, and B component images having been reflected on the panel surface are sequentially projected on a screen so as to be observed as a full color image. | 11-17-2011 |
20120069251 | DUAL PANEL MICRO REFLECTIVE LIQUID CRYSTAL PROJECTION DEVICE - A dual-panel micro reflective liquid crystal projection device is provided for improving brightness of projected image, including a set of two reflective liquid crystal panels respectively arranged at top side and right side of a polarizing beam splitter so that a light beam emitting from a light source located at bottom side of the beam splitter is received and split by the beam splitter into a horizontal polarization component and a vertical polarization component, which are then respectively reflected and modulated by the two reflective panels into vertically polarized light and horizontal polarized light for simultaneously transmitting identical image signals to a projection system arranged at left side of the beam splitter to thereby double the brightness of the image projected onto a screen. | 03-22-2012 |
20120069252 | PROJECTOR SYSTEM - A projector system includes a light source module, a light guiding plate, a polarizing beam splitter (PBS) module and a projection lens module. The light source unit includes a red-color light source, a green-color light source and a blue-color light source respectively for emitting red, green and blue light. The light guiding plate optically combines light emitted from the red-color light source, the green-color light source and the blue-color light source. The PBS module is positioned opposite to the light output surface of the light guiding plate and is configured for splitting the combined light into s-polarization light and p-polarization light, reflecting the s-polarization light and converting the reflected s-polarization light into p-polarization light, modulating and outputting the converted p-polarization light using a display information signal. The projection lens module projects light with information onto a screen. | 03-22-2012 |
20120069253 | PROJECTION SYSTEM - A projector includes a light source module, a light guide plate, a polarizing splitter (PBS) module, and a reflection device. The light source module is configured for emitting light. The light guide plate includes a light incident surface, a light output surface, and a light reflection surface. The light source is aligned with the light incident surface. The PBS module includes a polarizing splitter and a LCOS panel. The polarizing splitter is aligned with the light output surface and includes a first mounting surface and a second mounting surface. The polarizing splitter reflects s-polarization light and allows p-polarization light to pass therethrough. The LCOS panel on the second mounting surface modulates the s-polarization light into light with display information signal and reflects the light with display information signal to a projection lens. The reflection device on the first mounting surface reflects the p-polarization light into the projection lens for projection. | 03-22-2012 |
20120081622 | WAVE PLATE AND POLARIZATION CONVERSION ELEMENT, ILLUMINATION OPTICAL SYSTEM, AND IMAGE DISPLAY DEVICE THAT USE WAVE PLATE - Disclosed herein is a wave plate including: a first quartz plate configured to have a crystal optical axis inclined to a major surface; and a second quartz plate configured to have a crystal optical axis inclined to a major surface, the major surface of the second quartz plate being superimposed on the major surface of the first quartz plate, wherein an angle formed by the optical axis of the first quartz plate and the optical axis of the second quartz plate is 45 degrees in a front view seen from direction perpendicular to the major surface, and the optical axis of the first quartz plate is parallel to the optical axis of the second quartz plate in a top view seen from direction parallel to the major surface. | 04-05-2012 |
20120133851 | PROJECTOR APPARATUS - A projector apparatus includes: a polarization beam splitter block assuming a shape of a rectangular parallelepiped that includes two end surfaces and four side surfaces; a light source opposed to one of the side surfaces; an illumination optical system disposed between the light source and the polarization beam splitter block, which converts illuminating light to substantially parallel light so that is directed to the polarization beam splitter block; a reflection-type liquid crystal display element opposed to an illuminating light output surface, through which an illuminating light undergone polarization separation is output, and that includes a rectangular display area through which the illuminating light is modulated to modulated light output to the polarization beam splitter block; and a projection optical system that forms a projection image with the modulated light undergone polarization separation, wherein: shorter borders of the rectangular display area is set parallel to the end surfaces. | 05-31-2012 |
20120147280 | OPTICAL POLARIZATION STATE MODULATOR ASSEMBLY FOR USE IN STEREOSCOPIC THREE-DIMENSIONAL IMAGE PROJECTION SYSTEM - An optical polarization state modulator assembly for use in a stereoscopic three-dimensional image projection system includes a spatial light modulator, a light source emitting multiple wavelength components of light for incidence on the spatial light modulator, and a projection lens. A polarization converter system cooperates with the spatial light modulator to produce in alternating sequence polarized light carrying first and second perspective view images of a scene in different ones of first and second subframes. A polarization modulator, in response to first and second drive signals, imparts to, respectively, the image-carrying polarized light a first output polarization state during the first subframe and to the image-carrying polarized light a second output polarization state during the second subframe. The image-carrying polarized light in the first and second output polarization states propagates through the projection lens for transmission to an observer. | 06-14-2012 |
20120188471 | POLARIZATION CONVERSION DEVICE, POLARIZATION CONVERSION UNIT, AND PROJECTION TYPE VIDEO APPARATUS - A polarization separation device includes a transmissive substrate formed of crystalline material having a birefringent property and an optical rotatory property, and a polarization separation portion that is provided on an incidence-side surface of the transmissive substrate and transmits P-polarized light and reflects S-polarized light. A reflective element, which reflects the S-polarized light reflected by the polarization separation portion, is disposed substantially in parallel with the transmissive substrate. A phase difference plate is disposed at an emission-side of the transmissive substrate. The P-polarized light, which is transmitted through the polarization separation portion and is incident to the transmissive substrate, is made to be emitted from an emission-side surface of the transmissive substrate while maintaining a polarization plane thereof, and the polarization plane of the P-polarized light transmitted through the transmissive substrate is converted to be as S-polarized light in the phase difference plate. | 07-26-2012 |
20120242916 | PROJECTOR - When axes are projected to a reference surface perpendicular in the thickness direction of a liquid crystal layer, a rotational angle φ | 09-27-2012 |
20130050593 | HEAD-UP DISPLAY APPARATUS - A beam splitter outputs a light, which includes two polarized light components, when the splitter receives laser lights from laser light sources. The splitter is arranged such that when the light, which is outputted from the splitter and is reflected by or transmitted through a screen, is incident on a projection surface of a windshield, polarization directions of the two polarized light components are different from each other and are not parallel to a plane of incidence, which is formed at a point of incidence of the light on the projection surface. | 02-28-2013 |
20130057788 | LIGHT GUIDE WITH REGION BETWEEN LIGHT ROD AND LENS - A single piece light guide is disclosed herein. The single piece light guide may include a light rod and a lens. The single piece light guide may be formed using injection molding. The light guide may have one or more regions between the light rod and the lens. A housing may be provided for the light guide. The housing may have an opening that physically supports the light rod. Therefore, the light rod may be secured into place, which may prevent misalignment during use. The one or more regions between the light rod and the lens may assist in assembling and holding the light guide in the housing. | 03-07-2013 |
20130076995 | PROJECTION DISPLAY DEVICE - A projection display device includes a first display panel ( | 03-28-2013 |
20130128133 | LIGHT MODULATOR FOR OPTICAL IMAGE PROJECTION - A spatial light modulator comprising an array-type liquid crystal panel, a polarization beam splitter, an oblique wave plate and a converging lens. The polarization beam splitter is orientated to direct a source light towards a reflective planar surface of the array-type liquid crystal panel. The oblique wave plate and converging lens are located between the polarization beam splitter and the array-type liquid crystal panel. The converging lens is configured to direct light from the reflective planar surface onto a facing surface of the polarization beam splitter. | 05-23-2013 |
20130169894 | TILTED PLATE NORMAL INCIDENCE COLOR COMBINER WITH A POLARIZING BEAM SPLITTER - 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 at least two tilted dichroic plates having at least two reflectors configured with light collection optics to combine at least two colors of light. | 07-04-2013 |
20130222709 | Stereoscopic projection system employing spatial multiplexing at an intermediate image plane - Projection systems and methods for providing stereoscopic images viewed through passive polarizing eyewear. The systems relate to projectors that create left and right eye images simultaneously and often as side-by-side images on the image modulator. The systems act to superimpose the spatially separated images on a projection screen with alternate polarization states. The embodiments are best suited to liquid crystal polarization based projection systems and use advanced polarization control. | 08-29-2013 |
20130258216 | PICO PROJECTION LIGHT SYSTEM - A pico projection light system for improving an optical engine of a pico projector and enhancing effects of lighting. The improved pico projection light system comprises a light-emitting diode acting as a light source, a set of three collimators arranged with spaces therebetween and converting light emitted by the light-emitting diode into a parallel light, a set of two lens arrays arranged with spaces therebetween and uniformizing the parallel light, a set of two positive lenses arranged with spaces therebetween and magnifying light emitted from the lens arrays, a polarizing beam splitter receiving the magnified light and having a horizontal polarized light pass therethrough, and a reflective liquid crystal panel reflecting light and modulating optical signals projecting on a screen. | 10-03-2013 |
20140049698 | PROJECTION IMAGE DISPLAY DEVICE - The purpose of the present invention is to provide a projection image display device in which all of the multiple light sources to be used are positioned optimally, regardless of the mode of installation of the device. This projection image display device has two illumination optical systems ( | 02-20-2014 |
20140063358 | PROJECTOR - A projector is provided with an image forming device, a light path switching element, a polarization control element, and a polarization plate. The image forming device emits first image light and second image light. The light path switching element shifts a light path of the first image light and a light path of the second image light from each other. The polarization control element controls a polarization direction of the first image light to have a first polarization direction in a first display period, controls polarization directions of the first image light and the second image light to have a second polarization direction different from the first polarization direction in a transition period, and controls the polarization direction of the second image light to have the first polarization direction in a second display period. The polarization plate is disposed on the light exit side of the polarization control element. | 03-06-2014 |
20140146244 | LIGHT MODULE FOR A PROJECTION DEVICE - A light module for a projection device may include: at least one light source designed to emit partly polarization radiation; and a first polarization beam splitter, which is arranged in the beam path of the radiation emitted by the at least one light source, wherein the polarization beam splitter is designed to provide radiation of a first polarization at a first output and radiation of a second polarization at a second output. The light module includes a first beam cube arranged in the beam path of the radiation, a first to fourth LCD panels; a second dichroic beam splitter arranged between a first output of the first polarization beam splitter and a first input of the beam cube. | 05-29-2014 |
20140176818 | HYBRID POLARIZING BEAM SPLITTER - Polarizing beam splitters and systems incorporating such beam splitters are described. More specifically, hybrid polarizing beam splitters and systems with such beam splitters that incorporate polymeric reflective polarizers aligned with MacNeille or wire grid reflective polarizers are described. | 06-26-2014 |
20140340588 | ILLUMINATION DEVICE AND PROJECTOR - An illumination device ( | 11-20-2014 |
20150077645 | IMAGE-PROJECTION MODULE - The invention discloses an image-projection module, which includes a light source assembly, a light polarization switching element, and a light-path switching assembly. The light source assembly generates a laser light beam. The light polarization switching element is configured to make the laser light beam passing therethrough to selectively have a first polarizing direction or a second polarizing direction. The light-path switching assembly receives the laser light beam passing through the light polarization switching element and determines a projection direction of the laser light beam according to the polarizing direction of the laser light beam. | 03-19-2015 |
20150098028 | PRINTING APPARATUS, INK JET HEAD, AND PRINTING METHOD - There is provided a printing apparatus which performs printing by an ink jet method, including: an ink jet head which ejects ink droplets; and a driving signal output portion which outputs a driving signal that causes the ink droplets to be ejected from the ink jet head. The ink jet head includes: a nozzle which ejects the ink droplets; an ink chamber which stores ink to be ejected from the nozzle; and a piezoelectric element which causes the ink droplets to be ejected from the nozzle. The piezoelectric element causes all of the ink in the ink chamber to be ejected from the nozzle by being displaced corresponding to the driving signal. | 04-09-2015 |
20150109539 | STEREO PROJECTION APPARATUS AND STEREO PROJECTION SYSTEM WITH LOW THROW RATIO AND HIGH LIGHT EFFICIENCY - A stereo projection apparatus includes a polarized beam splitter assembly for splitting a projecting light beam into a transmitted light beam, a first reflective light beam and a second reflective light beam; a polarization state transforming assembly for adjusting the polarization state of the transmitted light beam or the polarization state of the first reflective light beam and second reflective beam; a light path direction adjustment assembly for adjusting a travel direction of the transmitted light beam or a travel direction of the first reflective light beam and the second reflective light beam; a light beam size adjustment assembly for adjusting a coverage range of the transmitted light beam or a coverage range of the first reflective light beam and the second reflective light beam; and a light modulator for modulating the adjusted transmitted light beam, first reflective light beam and second reflective light beam to left-circularly polarized light and right-circularly polarized light in accordance with a frame sequence. The stereo projection apparatus can effectively reduce the optical path difference between the reflective light and transmitted light, thereby significantly reducing the size of the entire device and making overlapping of the various light beams easier. | 04-23-2015 |
20150350630 | IMAGE PROJECTION APPARATUS - Provided is an image projection apparatus including: one or more light sources; one or more illumination optical systems; a first reflection-type light valve group including three light valves and being configured to modulate incident light based on first image information; a second reflection-type light valve group including three light valves and being configured to modulate incident light based on second image information; a first prism-type photosynthesizing member having a function of synthesizing, on one optical axis, light that is reflected by the first reflection-type light valve group; a second prism-type photosynthesizing member having a function of synthesizing, on one optical axis, light that is reflected by the second reflection-type light valve group; and a prism-type beam splitter configured to synthesize, on one optical axis, light that has been reflected by the first reflection-type light valve group and light that has been reflected by the second reflection-type light valve group. | 12-03-2015 |
20150373312 | PROJECTION DISPLAY UNIT AND DIRECT-VIEW DISPLAY UNIT - A projection display unit includes: an illumination optical system including one or more light sources; a reflective liquid crystal device that generates image light by modulating light from the illumination optical system, based on an input image signal; a polarizing beam splitter disposed on an optical path between the illumination optical system and the reflective liquid crystal device; a polarization compensation device disposed on an optical path between the polarizing beam splitter and the reflective liquid crystal device, and the polarization compensation device that provides a phase difference to light incident thereon to change a polarization state of the light; and a projection optical system that projects image light generated by the reflective liquid crystal device and then being incident thereon through an optical path, the optical path passing through the polarization compensation device and the polarizing beam splitter. The polarization compensation device has a first surface and a second surface that faces each other along an optical axis, and provides a phase difference between absolute values at light incidence from the first surface and at light incidence from the second surface, the absolute values being opposite in polarity to each other and being substantially equal to each other. | 12-24-2015 |
20160065918 | COLOR SEPARATING AND COMBINING SYSTEM AND PROJECTING DISPLAY APPARATUS INCLUDING THE SAME - At least one color separating and combining system includes a light combining element, such as a cross dichroic prism, a dichroic mirror that transmits a first (e.g., blue) light, and a first PBS that guides the blue light to a first liquid crystal panel. The system may include a wavelength selective PBS that guides a green light to a second liquid crystal panel and that guides a red light to a direction different from that of the second liquid crystal panel. The system may include a relay optical system, a second PBS that guides the red light to a third liquid crystal panel, and a trimming filter that transmits the green light and reflects the red light. The relay optical system may be disposed between the wavelength selective PBS and the second PBS. The trimming filter may be disposed between the wavelength selective PBS and the cross dichroic prism. | 03-03-2016 |