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6361172 |
Color projection system incorporating electro-optic light modulator and rotating light-transmissive element
A color projection display system, comprising a rotatable color drum with transmissive segments on the surface of the drum, the segments composed of dichroic filters having different color...
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6345894 |
Color projector
A color projector is made able to produce a bright and homogeneous color projection image. To this end, the color projector comprises plasma-discharge display devices ( 21 R), ( 21 G) and ( 21 B)...
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6347014 |
Illumination optical system and projection-type image display apparatus
An illumination optical system has a light source that emits white light having random polarization planes, a polarization separation device that separates the light from the light source into two...
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6342971 |
Projector using a light-selective prism
A red-reflecting film and a blue-reflecting film are formed in a substantially X shape on joint surfaces defined by the respective side faces of four columnar prisms or right-angle prisms. The...
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6341867 |
Polarized light illumination device and projector
In a polarized light illumination apparatus, randomly polarized lights emitted from first and second light sources are respectively separated by a polarized light separating and combining element...
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6340230 |
Method of using a retarder plate to improve contrast in a reflective imaging system
Methods and apparatus for enhancing the performance of a reflective liquid crystal display system. The high-contrast color splitting prism system utilizes a “double-passed” prism assembly....
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6339486 |
Holographic technique for illumination of image displays using ambient illumination
An apparatus and method is disclosed for illuminating an image display with ambient light using holographic techniques. The apparatus includes a pair of holographic optical elements each having a...
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6334685 |
Segmented light pipe apparatus and method for increasing luminous efficiency of single light-valve, color video projection displays
A color sequential video projector ( 10 ) employs a color modulating device ( 22 ) and a segmented light pipe ( 30 ) that coact to provide a high luminous efficiency. The color modulating device...
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6332684 |
Projection type color image display apparatus
A projection type color image display apparatus of the present invention includes: a light source section for generating white light beams; a first fly-eye lens array comprising a plurality of...
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6331879 |
Liquid crystal projector with an illumination optical system
A liquid crystal projector includes an illumination optical system provided with a light source, first and second lens arrays arranged in this order from the light source, a liquid crystal panel,...
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6328447 |
Projection device
As a polarization beam separating device constituting a projection device, a thin-film multilayer film (reflective polarizer) is used. The thin-film multilayer film is composed of a plurality of...
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6325514 |
Projection type display device
A projection type display device comprises a multiple light source arrangement, an integrator operative to make illumination rays from the multiple light source arrangement uniform in luminance...
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6322217 |
Projection display device
A projection display device is provided having a mounting mechanism of a modulation element which does not cause pixel displacement at variable temperature when the pixel pitch is reduced. The...
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6315415 |
Image projector
A projector has an illumination optical system, a reflection-type display panel, a projection optical system, and light-introducing device. The display panel is illuminated by the illumination...
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6317170 |
Large screen compact image projection apparatus using a hybrid video laser color mixer
A video image projection apparatus is disclosed. The apparatus uses a laser as a light source and modulates the light beam using a modulator according to an image signal. The apparatus projects the...
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6312129 |
Head mounted projector system
A head mounted projection unit (16) and system (30) is disclosed. The unit includes a tapered optical relay that allows the use of a simple optical projection system. The unit further includes...
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6309072 |
Video projection system for projecting more than one picture
A video projection system for projecting more than one picture in which a light source for generating at least one light bundle, an intensity modulator and a spatial light bundle modulator, wherein...
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6309071 |
Liquid crystal projection display system
A projection display system comprises a light source that generates non-polarized light having at least two polarization states and having a first color component, a second color component, and a...
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6304302 |
Liquid crystal display system and light projection system
A projection system used in a liquid crystal display (LCD) system is provided. The projection system has a light source, a polarization set which further includes a double dove prism, a vertical...
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6304381 |
Illumination optical apparatus
An illumination optical apparatus has a light source for emitting illumination light, a first lens array having lens cells arranged regularly in a grid-like formation so that the lens cells of the...
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6286961 |
Illuminating optical system and projection type display
An illumination system includes a light source and a dividing and superimposing section that divides a light flux emitted from the light source into a plurality of partial light fluxes and causes...
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6283598 |
Method of and apparatus for displaying an image
A pair of projectors are arranged for projecting an image. These projectors are disposed in optically conjugate relationship with the observer's eyes respectively. An image of an object to be...
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6283597 |
Method and facility for light-beam projection of images on a screen
In a process for the projection of images on a screen (20) by means of a light bundle, an individual projector (40) is provided for projecting the images, wherein the light bundle used for...
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6280035 |
Lens design to eliminate color fringing
Projection lenses and projection lens systems are telecentric between an illumination subsystem and a set of imagers. The lenses and systems can exhibit color fringing correction, uniform imager...
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6280034 |
Efficient two-panel projection system employing complementary illumination
An imaging system, comprising a broadband unpolarized white light source (81), a polarization converter system for converting polarization axes of unpolarized white light into a substantially...
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6280036 |
Projection apparatus
It is proposed to provide a projection apparatus capable of displaying an image by eliminating or reducing the influence of dust. The projection apparatus for projecting image information on a...
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6273567 |
Compact multi-path LCD projector
A multi-path reflective color liquid crystal display projection system utilizes one color separating dichroic mirror in combination with polarizing beam splitters and reflective liquid crystal...
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6264331 |
Image projector
An image projector has an optical integrator for splitting illuminating light into multiple light beams. The light beams are reflected by a reflecting member so as to pass through a first half of...
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6262851 |
Double-pass projection displays with separate polarizers and analyzers
A double-pass projection display system with separate polarizers and analyzers. One embodiment of the invention includes an input polarizer, a color separation/recombination device, and a number of...
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6259430 |
Color display
A color display system comprises a radiation generator in which the intensity of at least four wavelength bands can be controlled to reproduce a desired color. The system includes an intensity...
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6257728 |
Color projection system
Color projection system includes a light source, an integrator plate arranged in front of the light source and having a plurality of juxtaposed lens elements, an electro-optical light modulation...
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6254237 |
Multi-pixel microlens illumination in electronic display projector
A color liquid crystal display projector has a light source with a radiating element (e.g., arc or incandescent) and a liquid crystal display (LCD). The LCD includes an array of multiple picture...
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6250764 |
Polarization beam splitter, polarization converter, and projector
A technique for improving properties of polarizing beam splitters and polarizing conversion elements, and a projection display apparatus having high light utilization efficiency using such...
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6250763 |
Projection device
A projection device which includes a plurality of deflectable mirror arrays arranged to spatially modulate incident light. A totally internal reflecting surface is arranged to direct light to and...
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6247816 |
Optical system for projection displays using spatial light modulators
An optical system for a projection display employing three reflective spatial light modulations (SLM's) is described. Two or the three SLM imaging paths employ typical image combining and...
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6246526 |
Light irradiating apparatus and image displaying apparatus
In a light irradiating apparatus, a first fly-eye lens and a second fly-eye lens are disposed in succession from a light source side. A first lens having negative refractive power is disposed more...
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6231190 |
Color correction filter for displays
A method of and system for improving the saturation of the primary colors in a display system. A color correction filter (218) removes unwanted wavelengths from a beam of light. A color splitter...
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6231192 |
Projecting optical system
A projecting optical system has a plurality of display panels, a color integrating mirror, a projection optical system, a correcting member, and a lens member. The color integrating mirror,...
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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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6227671 |
Projector
In a projection display apparatus, an air inlet is formed below an optical modulation device and a color synthesizing system, and a suction fan is placed across the optical modulation device and...
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6224217 |
Optical illumination apparatus and image projection apparatus
An optical illumination apparatus including a plurality of light sources, elliptical mirrors, a reflecting apparatus for reflecting light in a predetermined direction, a converging apparatus for...
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6224216 |
System and method employing LED light sources for a projection display
In a single path embodiment of a multimedia projector (30) of the present invention, the light emitted from blue, green, and red generally monochromatic LEDs (72) or LED arrays (70) is propagated...
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6220710 |
Electro-optic projection display with luminosity channel
A luminosity channel may be provided in an electro-optic projection display by beam splitting the incident light source into first and second polarization beams. One polarization beam may be used...
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6217174 |
Image projection
A full color image projection system is provided using two non-color-specific image sources and color-specific filters. The system is capable of projecting an image using one primary color from one...
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6211976 |
Holographic projection system
Holographic optical elements (HOEs) can be used in systems and methods for providing illumination and for projecting images. The HOEs may be switchable HOEs, whose diffractive properties can be...
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6203160 |
High efficiency liquid crystal display projection system
A high efficiency liquid crystal display projection system is provided, which can effectively use the energy of s-polarized light and p-polarized light emitted from the light source. The high...
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6196687 |
Measuring convergence alignment of a projection system
A system for measuring the convergence alignment may include an optical system arranged to preferentially image and magnify the regions of a display screen outside the area normally viewed by...
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6193376 |
Display apparatus
A display apparatus of the present invention includes: an illumination optical system for emitting illumination light; a reflective display panel divided into a plurality of pixels, illuminated by...
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6191893 |
Color projection display system with improved hue variation
In a color projection display system having a source of white light, an electro-optic light modulator for modulating the light in accordance with a display signal, a projection lens, and dichroic...
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6190013 |
Polarized beam splitter and an illumination optical system and a projector provided with a polarized beam splitter
A projector includes: imaging members producing primary color light images; an illumination optical system for illuminating the imaging members; an image combining optical system for combining the...
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