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Class 348/780 - Beam combining


Subclass of Class 348 - Television
Definition: Subject matter comprising an optical structure which forms,
No. of patents: 39
Last issue date: 05/29/2007


NumberTitleIssue Date
7224411Digital projection equipment and techniques
Apparatus and techniques for enhancing characteristics of electronic projection systems are detailed. Included among the techniques are both superimposition of sub-images and tiling of superimposed images, the combination of which can be advantageous in improving re...
05/29/2007
7168810Method and apparatus for arranging light emitting devices in projection systems
Embodiments of this invention include a system, method and apparatus for combining the light paths of a plurality of colored light emitting devices into a single light path with two reflecting devices and an optical combiner assembly in a projection system. ...
01/30/2007
7142257Laser projection system
Laser projection system suitable for commercial motion picture theaters and other large screen venues, including home theater, uses optical fibers to project modulated laser beams for simultaneously raster scanning multiple lines on screen. Emitting ends of optical ...
11/28/2006
7102700Laser projection system
A laser projection system preferably for use in commercial motion picture theaters and other large screen venues, including home theater, uses optical fibers to project modulated laser beams for raster scanning on the screen. The emitting ends of the optical fibers ...
09/05/2006
7085063Multi-directional optical element and an optical system utilizing the multi-directional optical element
Multi-directional optical elements are disclosed that include a body having a first side having a first curvature, a second side having a second curvature, a third side having a third curvature, and a fourth side having a fourth curvature. The second side is dispose...
08/01/2006
7068320Image processing circuit, image display device, and an image processing method
The present invention is arranged such that interlace image data, which has been supplied, is converted to progressive image data in an I/P conversion section, and the image data converted to progressive style in the I/P conversion section is subjected to image proc...
06/27/2006
7020960Systems and methods for fabricating printed circuit boards
Systems and methods for plating printed circuit boards. Traces are formed using internal and external layers of a printed circuit board from conductive paths including contact pads to a side edge of the printed circuit board. The traces are connected with a plating ...
04/04/2006
6956551Device for displaying images by projection, comprising dichroic filters with a gradient
Device comprising: matrices of reflecting elements which can be electrically driven, and means for deconstructing a beam of polychromatic light and means for reconstructing complementary reflected beams, comprising...
10/18/2005
6859239Projection system with folded optical path
A high throughput, compact image display apparatus comprises a source unit to generate a spatially uniform light beam that propagates along a first beam path in a first direction. The image display apparatus also comprises an imaging unit to collect and focus the li...
02/22/2005
6736517Dual mode laser projection system for electronic and film images
A dual mode laser projection system having a film mode and an electronic mode that can be used to project an image onto a screen. In the film mode an image is projected by illuminating film with lasers, and in the electronic mode an image is created by modulation of...
05/18/2004
5907373Projection type color image display device
In a projection type image display device for combining an image by dichroic mirrors in a form of parallel plane plate, a projected image of high picture quality is presented by suppressing the astigmatism. In a projection type image display device compri...
05/25/1999
5719701Image display device and stereoscopic image display apparatus using the same
The present invention relates to an image display device comprising a plurality of image display means for displaying a plurality of bits of time-serial image information from image producing means, shutter means corresponding to the plurality of image di...
02/17/1998
5592238Field-sequential projection display
A single-tube type projection display with high light efficiency includes phosphors of three primary colors formed on upper, middle and lower portions of a faceplate of a CRT. Images of three colors are projected on the phosphor layers, and a color pictur...
01/07/1997
5430501Compact video projector
A projector is provided with three CRTs, a mirror system, and a projection lens. The three CRTs radiating light beams of colors different from one another are arranged such that respective tube axes thereof exist on the same plane. The mirror system inclu...
07/04/1995
54206482-CRT type projection apparatus including a red/green CRT and a blue/green CRT with different green phosphors
A 2-CRT type projection apparatus having a green and blue two-color cathode ray tube and a green and red two-color cathode ray tube and producing a projected picture of high resolution and brightness. The green phosphor of one of the two-color cathode ray...
05/30/1995
5339158Separation/synthesis mirror device in liquid filled housing with index matching
A three color separation/synthesis mirror device includes a housing, four dichroic mirrors which are arranged in the housing and cross with each other at right angles to form an X-shape, and a liquid filled in the housing so as to submerge the respective ...
08/16/1994
5321499Dichroic mirror and an image projection apparatus using the same
An image projection apparatus such as a video projector or projection television is provided for decreasing light loss. The apparatus has three cathode ray tubes for respectively providing images of red, green and blue, two dichroic mirrors for combining ...
06/14/1994
5293226Three tube color television projection display device
A three tube type projection television display device comprising red, green and blue projection tubes, wherein optical axes of projection lenses for the inclined projection tubes are off centered, instead of preparing a number of optical couplers of diff...
03/08/1994
5200814Video projector with optical color balance
Disclosed is a projection lens system for use in an optical system for magnifying and projecting original images displayed on plural image display devices onto a screen through projection lenses provided in corresponding relation to the image display devi...
04/06/1993
5168351Short focal length video color projector employing dichroic mirror block
A video color image projector which includes a block of crossed dichroic mirrors for combining the light rays from image rasters on respective monochrome image display devices and a projection lens for projecting the composite color rays so as to form an ...
12/01/1992
5067799Beam combining/splitter cube prism for color polarization
A cube bi-prism for beam combining and/or splitting through color and polarization multiplexing....
11/26/1991
5061993Projection television display device
Projection television display device includes three monochrome projection television display tubes (20, 21, 22) each having a display screen (24, 25, 26) which is provided on the inside of the display window (23) and luminesces in a different color. Each ...
10/29/1991
4913528Optical prism, and projection television set using same
A prism system is disclosed which employs at least one solid or liquid filled prism element optically coupled to at least one plate like member which forms a total reflection surface or a dichroic mirror. In one embodiment the prism is molded from transpa...
04/03/1990
4804884Display tube having improved brightness distribution
A projection television system comprising an array of three projection television display tubes (14) luminescing in red, green and blue, a focusing lens (16) associated with each tube and a display screen (12) on which the respective optical images are me...
02/14/1989
4764806Aplanatic image combiner for use in projection television systems with reduced spherical and coma aberration
An aplanatic image combiner. At least two image generating cathode ray tubes are provided having curved concave phosphor image generating surfaces. A set of dichroic mirrors are provided to combine images from each of the curved surfaces into a single com...
08/16/1988
4755868High brightness projection TV system using one or more CRTs with a concave phosphor surface acting to concentrate light into a lens system
A multiple tube projection television system. At least two image generating cathode ray tubes are provided, having an image generating surface which is concave. The radius of curvature of the image generating tubes is selected to be between 1.2 and 2 time...
07/05/1988
4714956Color display apparatus and method therefor
A method and an apparatus is disclosed for converting a plurality of electrical signals (14(a-c)) into a color visual display on a device (10). The device (10) comprises three CRT's (16(a-c)). Each CRT (16(a-c)) receives an electrical signal (14(a-c)), ge...
12/22/1987
4607280Video projector with mounting assembly enabling longitudinal axes of three CRT's to be tilted simultaneously while maintaining optical alignment
A top-to-bottom focussing arrangement which maintains convergence is provided for a video projector employing separate red, green and blue cathode ray tubes (CRT's) and a dichroic mirror assembly. Each CRT has a mounting bracket, and the mounting bracket ...
08/19/1986
4453178Projection television apparatus
A projection television apparatus having a retrofocus type projection lens system which has a sufficiently long back focus, a small F number and a large distortion. The lens system is constructed with five components and five lenses and comprises a first ...
06/05/1984
4400722Optical configuration for projection television apparatus
A projection television apparatus which has three monochromatic cathode-ray tubes, two type of dichroic mirrors, and a lens. Red, green and blue images from the three tubes are combined into the color image by the two types of dichroic mirrors and the res...
08/23/1983
4394681Optical system for projection television
A projection optical system is disclosed that is protractible and retractible within a narrow spatial column for emerging from and nesting in a cabinet of an ultra-compact, rear-projection television receiver. The system comprises in combination a station...
07/19/1983
4300156Projection television receiver having dichroic mirrors and a projecting lens with three different focal points
Apparatus is provided for projecting a television image to a distant screen using a lens which is not color corrected. Three separate images of different primary colors are produced by three kinescopes. The images are directed by a set of dichroic mirrors...
11/10/1981
4249205Aspheric projection lens system utilizing concave image
An aspheric projection lens system utilizes a single element aspheric projection lens for projecting a concave image from a concave cathode ray tube face plate, or the like onto a suitable projection surface....
02/03/1981
4163990Color television projection system
A system for projecting a color television image is described which comprises a plurality of cathode ray tubes, each of different monochromatic color and each having an image display screen, an optic having an equal plurality of successive reflective surf...
08/07/1979
4151554Liquid coupled color-television image projector
A color television image projector in which three television projection cathode ray tubes, one for each television primary color, are arranged in a T-shaped array with the face plates of the cathode ray tubes placed in a chamber, and crossed dichroic mirr...
04/24/1979
4054907Back projection apparatus
Three cathode ray tubes are provided for projecting and converging three different primary color images on a back projection screen. The back projection screen has a first cylindrically lenticulated face facing toward the cathode ray tubes for determining...
10/18/1977
4051513Color image projecting apparatus
A color image projecting apparatus having three cathode ray tubes which produce different respective color images and including two projecting lenses. A first primary color image reproduced on a first cathode ray tube is projected on a screen through a fi...
09/27/1977
4027328Catadioptrically coupled color television projection system
A color television projection system that optically combines the outputs of three small cathode ray tubes, each projecting an image in one of three primary colors, to produce a full-color image that is not subject to the usual "color matrix" losses experi...
05/31/1977
4024579Projection television tube system and method of producing same
A color projection television receiver and projector having three color tubes mounted in fixed relation and in predetermined location relative to a screen for projecting three color pictures in registration thereon. Accurate registration of the pictures r...
05/17/1977
 
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