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6243152 |
Contrast polymer dispersed liquid crystal projection display system
A polymer dispersed liquid crystal projection display is provided that has enhanced contrast. In the projection system using a polymer dispersed liquid crystal display (PDLC), polarized light is...
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6231161 |
Dot recording for preventing adjacency of recording positions
Dot recording technique is provided to relieve deterioration of image quality due to ink blot or deviation of dot density. Recording positions on each pass of main scan are set so that the dot...
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6227670 |
Projection type display apparatus
The projection type display apparatus according to the present invention has a prism for separating incident light into a plurality of light components and combining the plurality of modulated...
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6217173 |
Polarized light source device for liquid crystal projector
A high-efficiency polarized illuminating system for a liquid crystal projector is disclosed. The illuminating system is easy to fabricate and set up, with a low cost since, unlike in the prior art,...
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6195136 |
Optics arrangement including light source arrangement for an active matrix liquid crystal image generator
A system for producing modulated light is disclosed. The system comprises a spatial light modulator including a light modulating medium switchable between different states so as to act on light in...
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6184944 |
Optical fluid for projection prism
An optical system is disclosed. The optical system includes a fluid. A container is filled with the fluid, and the container has at least one window for permitting subject light to enter the...
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6183090 |
Projection type image display apparatus
A projection type image display apparatus of the present invention includes: a light source; a polarization selective reflection element having a function of reflecting or transmitting a light beam...
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6176586 |
Projection display apparatus
A projection display apparatus has at least two dichroic reflecting surfaces, a wavelength plate, a polarizing beam splitter, and two reflection-type liquid crystal display devices. The first...
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6174060 |
Projection-type display apparatus having polarized beam splitters and an illuminating device
A color separating/light guiding optics comprises two independent dichroic mirrors, reflection mirrors and correcting lenses. A horizontal plane region occupied by these optical components is...
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6163351 |
Backlight for liquid crystal display apparatus and liquid crystal display apparatus incorporating the same
A backlight for a liquid crystal display apparatus of the present invention includes a light guide plate having a first side, a second side, and an end face, and a rod-like light source provided at...
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6157419 |
Projector
In a projector, wherein the polarized states of a plurality of color lights illuminating image forming means differ from the polarized states of image lights projected onto a projection surface and...
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6152566 |
Projector for modulating polarized luminous flux
A λ/4 phase plate 821 is placed in an optical path between a blue light liquid crystal valve 811 and a cross-dichroic prism 813. S-polarized blue light incident on the blue Light liquid crystal...
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6147735 |
Reflection-type liquid crystal displaying apparatus
A liquid crystal displaying apparatus has a reflection-type liquid crystal display with vertical orientation-mode liquid crystals, to modulate linearly polarized light. Also provided is a...
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6142633 |
Polarized light illuminator and projection type image display apparatus
The polarized light illuminator of this invention includes: a light source; a first fly's eye lens and a second fly's eye lens disposed in this order from the light source; a polarization...
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6130728 |
Single panel color projection LCD having a plurality of reflectors
In a single panel color projection LCD, white light emitted from a light source is optically processed by an optical processing unit so as to convert three primary color beams obtained from the...
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6128055 |
Reflective display apparatus using compensator cell and ferroelectric liquid crystal at 90° to enhance contrast ratio
A reflective display apparatus enhancing a contrast ratio does not use a quarter wavelength plate and adjusts a switching angle of each molecular axis of a compensator and a ferroelectric liquid...
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6113239 |
Projection display system for reflective light valves
A projection display system for reflective light valves includes a light source for generating a light beam having RGB light components, wherein the red light component is p-polarized and the green...
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6094240 |
Liquid crystal display polarizing beam splitter with specific incidence angle
In a polarizing beam converter, a uniaxial anisotropic transparent medium is inserted and supported between isotropic transparent media; and an optical axis of said uniaxial anisotropic transparent...
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6081377 |
Polarized light synthesizing device and display device using the same
Light emitted from a light source is separated into ordinary light and extraordinary light by a polarization separation element including a polarized light synthesizing device. The ordinary light...
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6078363 |
Image display apparatus
A projection-type image display apparatus, includes: an illumination unit; a polarization selecting and reflecting element which splits a light beam from the illumination unit into a first light...
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6070982 |
Color separation element and projection apparatus
A color separation element includes a polarization dependent reflecting element having a different reflectivity dependent on a polarization plane and a wavelength of an incident light, and a...
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6062694 |
Projection type display apparatus
The present invention relates to a projection type display apparatus which utilizes a polarizing beam splitter and/or a color separating/combining optical system, each being constituted by an...
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6053615 |
Image projector with polarization conversion system
An image projector has an optical path including, from upstream to downstream, a light source, a light pipe, a polarization conversion prism, a positive lens group and a light valve. The light pipe...
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6042234 |
Polarized light illumination device and projection display device
A polarized light illumination device that is able to utilize both polarized light components by using a plurality of light sources without increasing the illumination angle, and a projection...
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6040881 |
Projection type display apparatus with color optimized anti-reflection films
In a reflection type liquid crystal projector, anti-reflection film optimized for the corresponding color (wavelength band) is formed on each of the light passing surfaces of a cross dichroic prism...
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6038054 |
Polarized-light converting elemental device having cholesteric crystal layer
A polarized-light converting elemental device which can produce an accurately unidirectionally and circularly polarized light with a minimized loss of light and a projection-type display device...
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6031587 |
Optical member, optical instrument including the same, and method of manufacturing the optical member
An optical member used in a color composition system of an optical instrument, such as a projector, includes a prism member formed by joining a plurality of prisms, and a plurality of image...
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6025890 |
Beam splitter element including a beam splitting layer and a polarizing layer for use in a light polarization modulating display system
A display system includes a reflective mode spatial light modulator for producing a pattern of polarized light, a light source for illuminating the spatial light modulator, and an optics...
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6023370 |
Light polarizing device for generating a polarized light with different polarizations
The present invention provides a light polarizing device comprising a light separating module and a retarder for converting an input trichrome unpolarized light having red, green and blue lights....
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6016173 |
Optics arrangement including a compensator cell and static wave plate for use in a continuously viewable, reflection mode, ferroelectric liquid crystal spatial light modulating system
A reflection mode, ferroelectric liquid crystal spatial light modulating system, includes a light reflecting type spatial light modulator. The spatial light modulator has a light reflecting surface...
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5999282 |
Color filter and color image display apparatus employing the filter
An improved color filter and a color image display apparatus employs the filter, the color filter has a hologram device for spectrally diffracting an incident light into plural light beams of...
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5986815 |
Systems, methods and apparatus for improving the contrast ratio in reflective imaging systems utilizing color splitters
Methods and apparatus for enhancing the performance of reflective LCD systems. The high-contrast color-splitting prism system utilizes a "double-pass" prism assembly. Polarized light enters the...
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5982541 |
High efficiency projection displays having thin film polarizing beam-splitters
A projection display system includes a thin film polarizing beam splitter/combiner has first and second light transmissive substrates in the form of prisms and a plurality of thin film layers...
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5959773 |
Parallel plate beam splitter configuration in high index glass
Color and/or polarization beam splitters are used in a multi-color light valve projection systems. The color and/or polarization beam splitters each include first and second prisms with a thin-film...
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5946056 |
Color composing optical system
In order to obtain an image without a registration shift, there is provided a color composing optical system which comprises a liquid crystal light valve having a plurality of pixels and a cross...
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5929946 |
Retarder stack for preconditioning light for a modulator having modulation and isotropic states of polarization
A retarder stack for preconditioning at least partially polarized light for input to a modulator includes a first retarder and the second retarder. The first retarder has a first retardance and a...
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5921650 |
High efficiency field-sequential color projector using two SLMs
A display is disclosed operating in a field-sequential color mode having first and second light valves which are simultaneously illuminated with different color beams having different polarizations...
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5914817 |
Thin film dichroic color separation filters for color splitters in liquid crystal display systems
An optical filter is provided for use in color projection display imaging systems which utilize liquid crystal light valves for image modulation. The optical filter is a dichroic coating which...
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5909259 |
Projection type liquid crystal display apparatus with green polarization different than red and blue polarizations
A projection type liquid crystal display apparatus includes at least three transmission type liquid crystal display panels and a four-division dichroic prism. The three liquid crystal display...
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5898521 |
LCD Projector
Light from a light source is divided into P-and S-polarized beams by means of a polarizing beam splitter and converted into the same polarized wave. Two polarized waves are incident on a liquid...
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5884991 |
LCD projection system with polarization doubler
A projector system includes a lamp, a reflector collector optic, a light pipe, a Polarizing Beam Splitter (PBS), and an LCD (Liquid Crystal Display) panel. The light pipe has a square or octagonal...
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5879065 |
Image projecting apparatus
An image projecting apparatus is so constructed as to generate a stereoscopic-image signal having images for right and left eyes alternatively arranged for each field, decompose an image produced...
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5854707 |
Polarizing type optical apparatus
A polarizing type optical apparatus has a first polarizing element disposed in a path of an incident luminous flux produced by a light source and a second polarizing element disposed in the path of...
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5852479 |
Color liquid crystal projector device
A liquid crystal projector includes a light source for generating light; a liquid crystal display device for modulating the light; a projection optical system for projecting light modulated by the...
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5833338 |
Projector
A projector including a non-polarized light source, a polarizing beam-splitter receiving light from the non-polarized light source and a selectably actuable polarization rotating light valve having...
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5826960 |
Protection type display device with polarized light reflecting mirror and polarized light source
A display device includes a reflective type polarizer, a light valve, an analyzer, a mirror, and a polarization rotating film. The polarizer allows a first polarized light to pass therethrough and...
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5816675 |
Optical projector
An optical projector is described that orients its optics engine preferably vertically within an enclosure that is higher than it is wide or deep. The invented optics engine uses a prismatic cube...
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5812223 |
Color LCD projector with three color separating polarizing beam splitters
An LCD projector which has a white light source for emitting a randomly polarized luminous flux, and a plurality of LCD panels for modulating luminous fluxes that are transmitted through the LCD...
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5808795 |
Projection type display apparatus
A projection type display apparatus includes a spatial light modulator, a polarizing beam splitter formed of members of a transparent material, and a projection optical system. The polarizing beam...
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5798819 |
Projection-display apparatus and method providing improved brightness of projected color image
Methods and apparatus are disclose for obtaining a bright projected color image. In a representative apparatus, polarized beam splitters (one for each primary color of an image to be projected)...
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