Matches 51 - 100 out of 171 < 1 2 3 4 >
Match Document Document Title
5166577 Projection cathode-ray tube with interference film  
A projection cathode-ray tube includes a multilayered interference film interposed between a face plate and a cathode-ray tube. In order to improve brightness in a direction of the normal, then on...
5148082 Color picture tube with light absorbing layer on screen  
A color picture tube comprising an envelope including a front panel, a phosphor screen formed in the inner surface of the front panel, and an electron gun arranged in the envelope. The phosphor...
5146322 Projection television apparatus for reducing red-emphasized peripheral screen portions  
A projection television apparatus is composed of a combination of cathode ray tubes for the three primary colors, red, green and blue. The green and blue cathode ray tubes have a multilayered...
5144417 Projection type television apparatus  
In a projection type television apparatus, a first and a second color selecting device are located on an optical light path passing through a cathode ray tube and a series of projection lenses are...
5138222 Projection cathode ray tube having an interference filter  
A projection cathode ray tube has an interference filter which is disposed at a boundary between a face plate and fluorescent layers. The interference filter is designed to be thinnest at the...
5121030 Absorption filters for chlor display devices  
A contrast enhancement filter for color displays, particularly adapted for color CRT tubes of the shadow mask type. A transparent plate has applied thereon absorptive areas, each area dyed with a...
5101136 High-efficiency cathodoluminescent screen for high-luminance cathode-ray tubes  
A high-efficiency cathodoluminescent screen for high-luminance cathode-ray tubes has a design which makes possible a considerable improvement of the luminance. The cathodoluminescent screen of the...
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...
5084649 Filter for visual display devices and the method of its manufacture  
A filter consists of a base made of transparent thermoplastic resin and of a black meshed screen made of such resins as nylon and polyester. The black meshed screen, which is coated with carbon, is...
5081394 Black matrix color picture tube  
A black matrix color picture tube has a phosphor layer and black matrix layer formed on the inner surface of the faceplate. A layer of glass having a low softening point is provided between the...
5068568 Cathode ray tube having multilayer interference filter  
A cathode ray tube, such as a projection cathode ray tube, having a multilayer interference filter disposed between the cathodoluminescent screen and the interior side of the faceplate, the...
5065071 Monochrome CRT with interference filter having filter layer with reduced transmission and projection color TV incorporating same  
The bulls-eye effect produced by projection television cathode ray display tubes with convexly curved faceplates and multi-layer interference filters is compensated by increasing the optical...
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...
5055737 Luminescent screen  
A luminescent screen includes a screen plate containing a substance capable of emitting luminescent light in response to stimulating light applied thereto, and a regular array of convexes on one...
5028840 Image display panel  
The invention relates to a large-size image display panel for outdoor use. The image display panel related to the invention has a number of cathode ray tubes which are respectively provided with a...
5021931 Lenticular luminescent screen  
A lenticular luminescent screen includes a lenticular base plate made of a transparent material which contains a substance capable of emitting luminescent light in response to stimulating light...
4996459 Cathode ray tube for color display  
A color cathode-ray tube having a face glass (1) coated with a plurality of phosphors (6B, 6G, 6R) different in luminescent color, the face glass (1) containing a colorant imparting a selective...
4990824 Color cathode ray tube having interference filter with different pass bands  
A color cathode ray tube of the shadow mask or beam index type in which the screen structure applied to the faceplate has a plurality of triplets of optical interference filter stripes which are...
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...
4904899 Projection cathode ray tube  
A projection cathode ray tube which comprises a glass bulb consisting of a funnel portion having a large opening at one side and a small opening at the opposite side, a panel portion which has the...
4884006 Inner surface specular reflection suppression in flat CRT faceplate  
Inner specular reflection is suppressed in a flat faceplate for use in a color cathode ray tube (CRT) by forming a flat glass faceplate to have an aft, or inner surface characterized by an...
4859902 Method of changing the chromaticity of a cathodoluminescent phosphor, colour cathode ray tube incorporating the phosphor, and projection television using same  
Phosphors used in colour cathode ray tubes, particularly but not exclusively projection television tubes, have colour point standards or chromaticities modified to conform to European Broadcasting...
4835437 Cathode ray tube with single crystal target  
Light output of single crystal phosphors used on cathode ray tubes can be vastly improved by use of a microfaceted surface structure conveniently produced by use of a single crystal epitaxial layer...
4831307 Cathode ray tube with light reflection film  
In a cathode ray tube, a single layer for prevention of a reflection of light rays is formed on a face plate having a non-spherical outer surface. The thickness of the layer is continuously...
4804883 Front attachment for CRT. E.G. for a monitor or video tube  
Front attachment unit for the cathode ray tube of monitors, television sets or the like, consisting of a sheet of glass, in particular a sheet of gray glass, anti-reflection equipment on the front...
4755868 High 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...
4731558 Method of reducing the reflectance of a transparent viewing screen and viewing screen with reduced reflectance  
A viewing screen is described, in particular the screen of a display tube, which has excellent anti-reflective properties and a method of making this screen anti-reflective. In this method the...
4724354 Image intensifier for producing a color image having a color separation filter sequentially passing visible blue light and its second order wavelengths, visible green light and its second order wavelengths, and visible red light  
A color separation filter arrangement for an image intensifier having separate blue, green and red filters which respectively have pass bands for visible blue light and its second order...
4713577 Multi-layer faceted luminescent screens  
A multi-layer luminescent screen includes a luminescent crystalline sublayer and a faceted overlayer. The faceted overlayer causes the emission from the screen of a greater fraction of the...
4695762 Electron beam pumped rod-like light emitters  
The luminescent screen of a cathode ray tube includes an array of monocrystalline or amorphous phosphor rod-like elements which are covered with a reflective coating except for one end of each...
4683398 Projection television display tube and device having interference filter  
A projection television display tube comprising in an evacuated envelope a display screen on the convexly curved inside of a display window in the wall of the envelope, which display screen...
4682075 Image display including improved light-absorbing matrix  
An image display including a viewing screen comprising spaced elemental image areas and a light-absorbing matrix of partially-graphitized carbon black adjacent these areas. The matrix may be made...
4663562 Contrast enhancement structure for color cathode ray tube  
A contrast enhancement structure for a full color cathode ray tube utilizes a combination of a louvered ambient light transmission control element in combination with a multi-notch band-pass...
4661742 Luminescent screen and a method of fabrication of said screen  
The luminescent screen comprises blocks having an optical transparency of less than 1. The blocks are placed between the grains of the first layer of luminescent material and the transparent...
4647812 Display tube having a display window with an interference filter  
A display tube comprising in an evacuated envelope (1) a display screen (7) provided on the inside of a display window (2) in the wall of the envelope (1), which display screen (7) comprises...
4642695 Projection cathode-ray tube having enhanced image brightness  
A projection cathode-ray tube comprises a vacuum vessel (10) having a face plate (7), an interference thin film (20) on the inner surface of the face plate, a phosphor layer (8) on the interference...
4634926 Display tube provided with an interference filter  
A display tube comprising in an evacuated envelope (1) a display screen (7) provided on the inside of a display window (2) in the wall of the envelope (1), which display screen (7) comprises...
4633131 Halo-reducing faceplate arrangement  
A faceplate arrangement for a monochromatic cathode ray tube includes a compound filter disposed between the faceplate and a light scattering luminescent screen. The compound filter includes a...
4630097 2D/3D compatible polarized color TV system  
A 2D/3D compatible polarized TV system is described which comprises a 3 color TV camera with pairs of adjacent 3D right and left images in each color. The image pairs are scanned to derive pairs of...
4604550 Display tube with terbium-activated blue-luminescing phosphor screen  
A display tube comprising in an evacuated envelope means to generate at least one electron beam which is focused on a display screen and describes a field thereon, which display screen comprises a...
4591757 Color display tube having screen with sharply curved surfaces  
A color display tube comprising a faceplate including a display window connected to a skirt which is substantially parallel to the axis of the envelope via a sharply curved transition portion. The...
4587553 Apparatus for displaying images wtih reduced coarseness  
An image display apparatus includes an image display screen which is formed by a plurality of picture display elements arranged repeatedly with a predetermined pitch for displaying an image as a...
4581561 High contrast cathode ray tube with integrated filter  
The invention concerns a novel image reproducing structure for use in a cathode ray tube. This structure comprises a glass substrate which is transmissive of visible light and has a screen...
4580077 Display tube having a display window with sharply curved skirt portion  
A display tube comprising an envelope consisting of a neck, a cone, and a faceplate including a flat or slightly curved, substantially rectangular display window and a skirt which is substantially...
4568852 Cathode ray tube with liquid coolant and reduced X-ray emission  
A cathode ray tube apparatus having a glass panel in front of the phosphor screen made of a material which has an X-ray absorption coefficient larger than that of the backing on which the phosphor...
4565946 Color cathode ray tube with infrared emitting phosphor in screen  
In order to permit reliable light pen interaction with a black matrix shadow mask CRT, the conventional black carbon matrix is replaced by an IR phosphor. This provides a component of IR radiation...
4565947 Color cathode ray tube for use with a light pen  
In a shadow mask cathode ray tube for use with a light pen, the elemental phosphor areas emissive of red light comprise a blend of a red-emissive phosphor with silver-activated cadmium sulphide...
4540913 Cathode-ray tube for color display with separate fluorescent layer  
A cathode-ray tube for color display comprises a face plate (1), a picture element layer (10) formed on an inner surface of the face plate and including two or more kinds of picture elements (5, 6...
Matches 51 - 100 out of 171 < 1 2 3 4 >