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Match Document Document Title
7324169 Projection optical system, projection television, and method of manufacturing lens included in projection optical system  
Provided are a projection optical system, a projection television, and a method of manufacturing a lens included in the projection optical system. The projection optical system includes lenses for...
7312835 Projection type display apparatus  
In a projection type display apparatus including a blue CRT display apparatus with low luminous efficiency and low luminous efficiency, the present invention seeks to improve contrast while...
7133084 Lens systems for projection televisions  
Projection lens systems for use with cathode ray tube (CRT) projection televisions are provided which have positive first lens units (U1) and negative second lens units (U2) where the negative...
6900945 Lenticular lens sheet  
A lenticular lens sheet 4 comprises a plurality of lens elements of incidence 21 arranged on the incidence side, and a plurality of lens elements of emergence 22 arranged on the emergence side. The...
6639631 Projection television using a holographic screen  
A projection television receiver having red, green and blue image projectors for respective images of different colors and a high gain projection screen formed by at least one hologram disposed on...
6501517 Optical system in projection television receiver  
An optical system in a projection television receiver includes: a screen for simultaneously displaying R (Red), G (Green) and B (Blue) images thereon; and a light source part comprising R, G and B...
6400417 Projection television with three-dimensional holographic screen and centered blue CRT for balanced CRT drive  
In a method for controlling color temperature a projection television having green, blue and red image projectors and a projection screen, holographically improving color shift performance of the...
6369864 Optical unit spacer-bracket for projection television sets  
A projection television set having a screen and three projection units each capable of projecting a monochromatic image onto the screen. The projection units each having a cathode ray tube (CRT)...
6342929 Projection image display apparatus  
The projection image display apparatus includes a plurality of image generating sources for generating three primary colors, including red, green, blue image light, respectively, and a projection...
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...
6275270 Video display and image intensifier system  
A video display system utilizing a video source and an image intensifier having a substrate. A video image source positions at the substrate to provide a photon signal. A photocathode element at...
6275272 Projection television receiver  
A projection television receiver for embodying a high definition and high quality projection television receiver by processing an image of an image source. A red, a green and a blue image are...
5907373 Projection 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...
5764312 Projector apparatus  
A projector apparatus which assures easier fine and rough adjustment of a swing and tilt angle, includes inclination rings which are formed symmetrically with respect to the center line of the...
5712691 Method and apparatus for area dependent dynamic blue de-focusing  
A method and projection television system for projecting images having a plurality of color components, includes a device for filtering a first color component signal from a composite signal to...
5663774 Three tube beam projection system and method  
A projection system suitable for reducing the convergence angles for red, green and blue color beams is disclosed. The projection system includes first and second beam projection tubes arranged in...
5619255 Wide-screen video system  
An apparatus and method for displaying wide-screen images by assembling a composite image from three or more video segments, wherein a panoramic or cinematic wide-screen image is captured using...
5585867 Projection tube and its application in a video projection system  
A projection tube featuring good accuracy in controlling a slant angle between a cathode ray tube and a projection lens, an excellent focusing performance, and further low production cost, and also...
5559564 Cathode ray tube apparatus for projection TV system  
A cathode ray tube apparatus for a projection TV system which improves the color purity of the luminescence in the cathode ray tube, reduces the chromatic aberration by the projection lens, enables...
5387948 Method and apparatus for reducing scattered light in projection television tubes  
To prevent light scattering at the edges of CRT's used in projection television, emission of light is prevented beyond a desired region of raster scanning. In one embodiment, portions of the front...
5381189 Projector in a projection television  
A liquid cooling type projector is provided with greater flexibility to meet different screen sizes of a projection television and, thus, contributes to the reduction of production cost. The...
5373347 Staggered multiple CRT's in a photographic process printer  
A photographic printer that uses a plurality of small CRTs to print wide format images. Within the printer, the CRTs are positioned horizontally adjacent one another but vertically displaced so...
5337093 Projection television system including a plurality of display elements with corresponding optical axes incident to a screen at different points offset from the screen center  
In a projection television system having display elements displaying images of respective colors, a screen on which a color image is formed by magnifying and synthesizing the images of the...
5299017 Screen fixing device of projection type television system  
A screen fixing device of a projection type television system including a projection unit comprises a fixing frame for detachably fixing a screen, the fixing frame being provided with a plurality...
5296922 Projection television with a wavelength-selection-type rear projection screen  
A projection television has a rear projection screen including a Fresnel lens and a lenticular lens, and a smoke sheet. The screen is characterized in that a dye or a pigment is mixed into the...
5181103 White balance adjusting system for a color television system  
A white balance adjusting system for a color television system has three CRTs for projecting beams of three primary colors, and a color control circut for controlling outputs of the three CRTs....
5181122 Display device for displaying a wide picture  
A display device for displaying a wide picture includes a main screen on which the wide picture is to be produced, one picture projector carrying a picture generation unit having a first screen...
5146342 Rear projection television set with lenticular sheet and fresnel lens  
A rear projection television set in which a lenticular sheet is superposed to a Fresnel lens to form a light transmissive screen, at least one projection cathode ray tube projects an image onto the...
5103302 Optical system for projection type image display device  
A projection type image display device provided with three projecting lenses projecting light emitted by cathode-ray tubes of different colors, red, green and blue, on a screen while enlarging an...
5099318 Three tube color projection television system having at least one tube without an interference filter  
A projection television system having three cathode ray tubes one of which has a display window, a fluorescent material layer disposed on the innermost surface of the display window, and a...
5057912 Cathode-ray tube with interference filter and projection television system employing same  
A projection television system comprising a cathode-ray tube having a face plate, a display screen coated with a phosphor of the type ZnS:Ag and an interference filter arranged between the display...
5055922 Color TV projection lens system  
Disclosed is an improved color projection TV lens system which provides reduced chromatic aberration and improved chromaticity. These improvements are achieved by incorporating a light absorbing...
5045930 Optical system for a three-tube projection television set  
A three-tube color projection television. The outside projection optics are arranged so that a single part can be produced for use in projection televisions of diverse screen size. An image surface...
5011277 Multi-screen projector  
Unit projectors whose number is n×m are arranged in n rows and m columns like a matrix. Unit screens whose number is n×m are arranged so that they as a whole form an enormous transmissive screen. E...
5010396 Television projector for projection display  
A TV projector for a three-tube projection display which projects a red picture, a green picture and a blue picture by three TV projectors. The TV projector comprises a projection TV CRT and a...
5010397 Triple tube type projection television  
A triple tube type projection television projects images of blue, green and red projecting tubes onto a screen by lenses disposed in front of the respective projecting tubes, and synthesizes the...
4987483 Projection television set  
In a projection television set including red, green and blue CRTs, and red, green and blue projection lens systems, the green projection lens system is provided with a coating or a filter having a...
4937661 Projection television display tube and device having band pass interference filter  
Projection-television display tube includes a band pass or Fabry-Perot interference filter between the display window and the luminescent screen, resulting in the elimination of undesirable...
4914510 Method for improving the white field uniformity of a projection color TV using CRTs having interference filters, projection color TV and CRTs resulting from the method  
The white field uniformity of a projection color TV employing three monochrome cathode ray tubes is improved by matching the center-to-edge luminance gradient of the red-emitting and/or...
4914511 Projection color TV using CRTs having interference filters with different number of layers  
The variation in center-to-edge luminance gradient along the minor axis of the red-emitting and/or blue-emitting tube having a multilayer interference filter, is reduced by reducing the number of...
4882617 Projection device and associated electro-optic monochrome display device with phosphor layer and interference filters  
A projection device features at least one monochrome display device including electro-optic means defining a pattern for display, a monochrome luminescent layer, a first interference filter for...
4866530 Multiple screen, modular video display projection system  
A multiple screen, modular video display system includes a plurality of video projection units joined together in a matrix to form a large video wall display. Each unit comprises a trio of CRT...
4807014 Three tube color projection television system having multispot blue tube and single-spot red and green tubes  
A projection color television system having an improved resolution and luminance comprises red, green and blue color emitting tubes, the electron beams of which are focused onto their respective...
4777532 Projection apparatus for a projection television receiver  
A projection apparatus for a projection television receiver comprises a projection tube for receiving video signals and projecting images therefrom; a lens aligned for focusing images from the...
4730211 Projection-type color television receiver wherein the center lines of right and left projection lenses intersect a display screen at points which are offset from a point at which the center line of a center projection lens intersects the display screen  
A projection-type television receiver comprising right, left and center projection tubes each having a face, the images on the faces of the right and left tubes being formed in registry with the...
4729031 Coupling system for image projection  
In a video projector for projecting a video picture displayed on a Braun tube, the space between the Braun tube and a lens is filled with a medium having a refractive index substantially equal to...
4679069 Color picture projection system with a wavelength-selective reflector for filtering out undesired light from a monochrome picture display source  
In a color picture projection system three monochrome pictures are superimposed to form a color display on a projection screen by means of a chromatic projection lens system in each of three...
4544946 Vertical color shift correction in a rear projection television screen  
A rear projection television receiver incorporates red, green and blue-image producing kinescopes and a screen which includes a prism lens arrangement. The prism lens comprises a number of prism...
4443814 Rear projection apparatus  
A rear projection apparatus for producing an optical image on a surface of a rear transmitting screen in which a convex lens array is formed on both surfaces of the screen, each convex lens formed...
4423438 Projection type cathode ray tube with masking means  
A projection cathode ray tube is provided with elements for correcting a spherical aberration in the optical system. These elements include a correction lens disposed in front of the tube and a...
Matches 1 - 50 out of 64 1 2 >