Abstract: There is disclosed a display screen obtained such that a first pigment layer and a resist layer are exposed and developed, then a second pigment layer is formed on the photoresist pattern, and the resultant structure is coated with a resist decomposition agent to remove the photoresist pattern and the second pigment layer formed on the photoresist pattern.

Abstract: A method of forming a fluorescent screen, such as a black matrix or a color filter, on a front panel of a cathode ray tube is described. The method comprises the steps of forming a photosensitive adhesion layer on an inner surface of the front panel, exposing the photosensitive adhesion layer through a color selecting electrode having a plurality of slots for reducing adhesion level of exposed area of the photosensitive adhesion layer, bringing a pigment layer provided on a supporting sheet into intimate contact with the photosensitive adhesion layer, applying pressure to the pigment layer and the photosensitive layer, and peeling off the supporting sheet from the pigment layer. Alternatively, a pigment may be dispersed in the photosensitive adhesion pigment layer.

Abstract: A method for forming a conductively coated matrix structure for separating rows and columns of sub-pixels on the faceplate of a flat panel display device. In one embodiment, the present invention deposits a photoresistive material over the interior surface of a faceplate having a non-conductive matrix structure formed thereon. The photoresistive material is deposited into sub-pixel regions separated by the matrix structure. The photoresistive material is dried and exposed in the sub-pixel regions. After unexposed photoresistive material is removed, a layer of aluminum is evaporated over the interior surface of the faceplate such that the matrix structure and the exposed layer of photoresistive material in the sub-pixel regions is coated with a conductive layer of aluminum. Next, the present invention applies an etchant to the exposed photoresistive material disposed in the sub-pixel regions.

Abstract: The pigment dispersion composition having a good dispersibility, a good transparence and an anti-coating properties, which contains 0.5 to 50 parts by weight of an inorganic pigment, at least one type of dispersant selected from the group consisting of a sodium salt, an ammonium salt and an amine salt of an acrylic resin, an acryl copolymer resin, a polycarbonic acid, a condensation product of aromatic formalin sulfonate, and water or a solvent miscible with water.

Abstract: In the manufacture of a color-display device comprising color-filter layers, phosphor haze may occur. Said phosphor haze adversely affects the picture quality. Phosphor haze can be reduced substantially, or precluded, by providing one, and only one, of the color-filter layers by means of a negative lithography process and, subsequently, providing the phosphor corresponding to this color-filter layer before the other phosphor layers.

Abstract: A method for forming a three-dimensional multi-level conductive matrix structure for a flat panel display device. In one embodiment, the present invention forms first pixel separating structures across a surface of a faceplate of a flat panel display. The first pixel separating structures separate adjacent first sub-pixel regions. In this embodiment, the first pixel separating structures are formed by applying a first layer of photo-imagable material across the surface of the faceplate. Next, portions of the first layer of photo-imagable material are removed to leave regions of the first layer of photo-imagable material covering respective first sub-pixel regions. Then, a first layer of conductive material is applied over the surface of the faceplate such that the first layer conductive material is disposed between the aforementioned regions of the first layer of photo-imagable material.

Abstract: A new method for forming an anode plate for a color flat panel Field Emission Displays (FEDs) having improved gettering, was accomplished. The method involves forming on a transparent insulating plate (glass) an array of pixels of three phosphors comprising the primary colors and having in or/and around the array of pixels gettering material to provide more efficient gettering of volatile material from the FED cavity. The electrons are injected into the pixels when the electron field emitters are electrically accessed via the address and image forming circuits. The injected electrons heat and activate the gettering material in and around the pixels and provide very effective gettering in the FED cavity.

Abstract: The black matrix of the faceplate panel is deposited by a wet-layer photoconductive manner. An organic conductive layer is initially deposited on the faceplate panel, on which an organic photoconductive material is formed to form an organic photoconductive layer. The photoconductive layer is charged to positive or negative potential and a selective area of the organic photoconductive layer is exposed to light radiated from an exposure device, such that the potential can be left on the unexposed area, where the black matrix will be deposited, of the organic photoconductive layer. Then, As novel steps, deposition of the conductive black matrix is achieved according to the following steps. First, a conductive black matrix material is charged having the opposite potential to that left on the unexposed area of the organic photoconductive layer.

Abstract: In a method forming a phosphor layer on a screen panel, the black matrix is made of a conductive material. The conductive black matrix is formed by a wet-layer photoconductive method. That is, an organic conductive layer is initially deposited on the screen panel, then an organic photoconductive material is formed on the organic conductive layer. The plotoconductive layer is charged to a positive or negative potential and a selective area of the organic photoconductive layer is exposed to light radiated from an exposure device, such that the potential can be left on the unexposed area where the black matrix will be deposited. Finally, the conductive black matrix material is deposited on the unexposed area.

Abstract: A composition for a black matrix is disclosed. The composition is composed of a black pigment and a binder for the pigment. The black pigment is a compound-oxide black pigment, which comprises at least two metal oxides and has a spinel or inverse-spinel crystalline structure. Also discloses are a process for the formation of a black matrix from the composition and an article provided with a black matrix so formed.

Abstract: A high luminescence display, and methods for making such a display, are described. A faceplate for a display device having a glass face is provided, having phosphor elements on the glass face. There are reflective elements, on the glass face and adjacent to the phosphor elements, with surfaces angled toward the phosphor elements, whereby light emitted from the phosphor elements reflects off the reflective elements and travels through the glass face. The reflective elements may be formed of, for example, aluminum, and be directly adjacent to the phosphor, or offset from it.

Abstract: For the manufacture of a color screen for a cathode ray tube a process is described which uses a single photolithographic mask for defining multiple patterns, so that said single mask may be used for determining the different areas where several different phosphor layers will be located. Masks used for conventional photolithographic processes normally comprise a pattern of regions that are either fully transparent or fully opaque to the radiation used for exposing the resist. The mask used as part of the present invention includes regions that are neither fully transparent nor fully opaque, having, instead, a grey scale of optical densities. Through careful control of both exposure and development time, selected parts of a layer of a positive photoresist, that were exposed through successively denser regions of the mask, can be successively removed.

Abstract: A light fixing layer is deposited on the panel during the screening process of a panel. The light fixing layer can be softened when it is subjected to light so as to allow the phosphor layers to be fixed on the panel. That is, the light fixing layer shows adhesive characteristics when subjected to light. Therefore, after developing all phosphor layers on the panel, when the light is radiated to the light fixing layer, the light fixing layer is softened, thereby fixing the phosphor layers.

Abstract: The novel method for producing a coded marking on a CRT faceplate panel having an exterior and an interior surface with a viewing area surrounded by a periphery and having a luminescent screen with a plurality of different light-emitting phosphors separated by light-absorbing material includes the steps of: depositing a suitable photoresist on the interior surface of the panel to form a layer that extends across the viewing area and onto the periphery; illuminating areas of the photoresist on both the viewing area and the periphery with actinic radiation to selectively change the solubility of the photoresist; developing the photoresist to remove the more soluble areas, thereby exposing underlying portions of the interior surface of the panel while leaving retained areas of less soluble photoresist. The retained areas of the photoresist and the exposed portions of the interior surface of the panel are then overcoated with a light-absorbing material which is dried to form a coating.

Abstract: A high luminescence display, and methods for making such a display, are described. A faceplate for a display device having a glass face is provided, having phosphor elements on the glass face. There are reflective elements, on the glass face and adjacent to the phosphor elements, with surfaces angled toward the phosphor elements, whereby light emitted from the phosphor elements reflects off the reflective elements and travels through the glass face. The reflective elements may be formed of, for example, aluminum, and be directly adjacent to the phosphor, or offset from it.

Abstract: A high luminescence display, and methods for making such a display, are described. A faceplate for a display device having a glass face is provided, having phosphor elements on the glass face. There are reflective elements, on the glass face and adjacent to the phosphor elements, with surfaces angled toward the phosphor elements, whereby light emitted from the phosphor elements reflects off the reflective elements and travels through the glass face. The reflective elements may be formed of, for example, aluminum, and be directly adjacent to the phosphor, or offset from it.

Abstract: The improved water-soluble photosensitive resin composition comprises a high-polymer compound represented by the general formula(I): ##STR1## (where X is Na, K or NH.sub.4) and a water-soluble polymer which is either polyvinylpyrrolidone or a copolymer of vinylpyrrolidone and vinylimidazole or both. The composition is applied to a substrate, exposed through a mask pattern and developed to form a photocured pattern and, thereafter, a light absorber is applied to the entire surface of the substrate and dried, followed by stripping away the photocured pattern and the overlying light absorber to form a black matrix pattern. The composition is suitable for use as a photoresist in the manufacture of black matrices as on color CRTs and capable of efficient formation of photocured patterns with high sensitivity by shorter times and lower intensities of exposure. In addition, the composition adheres strongly to glass substrates and is capable of pattern formation as thin film that is faithful to the mask pattern used.

Abstract: An exposure system including a master mask used for exposing a glass panel to form a plurality of phosphor stripes or dots on an inner surface of the glass panel wherein the master mask and/or a light source are movable for correction of an exposure position, thereby eliminating the need to attach and remove a color selecting mechanism to and from the glass panel when the glass panel is exposed to form a fluorescent screen on the inner surface of the glass panel.

Abstract: A process is described for the fabrication of a multicolor filter intended for use as part of a colored LCD system. A particular feature of the process is that no mask is needed for the formation of the final set of miniature color filters, thereby saving on mask costs as well as reducing processing time.

Abstract: A new method for forming an anode plate for a color flat panel Field Emission Displays (FEDs) having improved gettering, was accomplished. The method involves forming on a transparent insulating plate (glass) an array of pixels of three phosphors comprising the primary colors and having in or/and around the array of pixels gettering material to provide more efficient gettering of volatile material from the FED cavity. The electrons are injected into the pixels when the electron field emitters are electrically accessed via the address and image forming circuits. The injected electrons heat and activate the gettering material in and around the pixels and provide very effective gettering in the FED cavity.

Abstract: A high efficiency field emission display, and a method for manufacturing such a display, having reduced driver circuit requirements, and which may be operated over a range of anode voltages while efficiently using existing phosphors, is described. A field emission display having a baseplate and an opposing face plate, includes a glass plate acts as a base for the faceplate. There is a patterned layer, having openings, of black matrix material over the glass plate. A plurality of phosphorescent elements are formed in and adjacent to the openings in the black matrix layer. A metal film overlays a portion of the top surface of each of the phosphorescent elements. The metal film may be patterned in a mesh or in other shapes, and provides for the highly efficient operation of the display of the invention. The baseplate, formed on a substrate, is mounted opposite and parallel to the faceplate, and has a conductive layer over the substrate.

Abstract: A method for use in the construction of a color display screen using deposition of a plurality of electroluminescent materials onto a substrate bearing said screen. The method comprises the forming operations a), b), and c) in any sequence: a) forming on the substrate a first pattern of deposition sites covered with a first material selectively strippable by a first agent; b) forming on the substrate a second pattern of deposition sites covered with a second material strippable by a second agent but not significantly attacked by said first agent; and c) forming on the substrate a matrix surrounding the first and second patterns of deposition sites. The method includes thereafter performing a first stripping of the first material with the first agent to reveal first deposition sites within the matrix and performing a first depositing of a first electroluminescent material within the first revealed deposition sites.

Abstract: Color filter elements are prepared by sequentially laminating, exposing and developing colored photoresist materials to form planar images on a transparent, non-birefringent substrate such as glass or polymeric film. Color filter elements are useful for elements in color displays such as liquid crystal display devices.

Abstract: A safe and low cost process for forming a black matrix for a color filter, which process provides high light screening properties and is suitable for panel processing. The process comprises the steps of providing a transparent substrate having provided thereon an aqueous resin layer containing physical development nuclei; supplying a developer for physical development on the aqueous resin layer; superposing a donor sheet containing a metallic compound comprising metal ions on the aqueous resin layer via the developer for physical development; and precipitating a metal of the metallic compound in the aqueous resin layer by physical development. Furthermore, the aqueous resin layer may or may not be patterned.

Abstract: A method for production of graph scales of a panel of a cathode-ray tube for an oscilloscope for forming the panel graph scales by exposing and developing a slurry precipitate on a panel through a mask having cathode scales. More particularly, the present invention relates to a panel graph scale production method of a novel type characterized in that a specific filter having light transmissivity of about 62% at the center is disposed between the mask and a light source. According to this method, it is not necessary to arrange a large number of parallel ray lenses between the mask and the light source as opposed to the prior art, the distance between the panel and the light source can be more reduced, the overall exposure system for producing the scales can be more simplified, and the intended panel graph scales can be produced under an ideal condition.

Abstract: A process for preparing a black matrix comprising the steps of producing a developed substrate by coating, drying, exposing and developing a photoresist on the inside of a substrate, producing a dried substrate by drying the developed substrate several times, coating a dye on the dried substrate and then drying the board, coating graphite on the dried substrate, and etching the graphite-coated substrate. This method makes it possible to perfectly etch the black matrix dot and increase volatility in fluorescent coating.

Abstract: Disclosed is a photosensitive resin composition for use in a light-shielding film, comprising a photosensitive resin and a light-shielding coloring material, wherein light transmission properties after formation of the light-shielding film are controlled by the light-shielding coloring material so that (i) the light transmission through the light-shielding film is 1% or more in at least one wavelength of a light wavelength region of from 330 nm to less than 425 nm, and (ii) the light transmission through the light-shielding film is 2% or less in a light wavelength region of from 425 to 650 nm.

Abstract: A phosphor screen (10) formed of respective color phosphor layers (9R), (9G), (9B) and respective color filter layers (4R), (4G), (4B) is formed on the inner surface of the panel (1). In that case, the respective color filter layers (4R), (4G), (4B) are respectively formed between the inner surface of the panel (1) and the phosphor layers (9R), (9G) and (9B). Therefore, the color cathode ray tube can be made high in contrast and in brightness.

Abstract: In accordance with the present invention, a method of electro-photographically manufacturing a luminescent screen assembly for a color CRT 10 on an interior surface of a faceplate panel 12 is described. A volatilizable, organic conductive (OC) layer 32 is provided on the interior surface of the panel and a volatilizable, organic photoconductive (OPC) layer 34 overlies the OC layer. The method includes the steps of: establishing a substantially uniform electrostatic charge on the OPC layer; exposing selected areas of the OPC layer to visible light to affect the charge thereon; developing the selected areas of the OPC layer with a triboelectrically charged dry-powdered, screen structure materials; fixing the screen structure materials to the underlying OPC layer with a suitable fixative; filming the screen structure materials; aluminizing the screen; and baking the aluminized screen.

Abstract: In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly for a color CRT 10 on an interior surface of a faceplate panel 12 is described. A volatilizable organic conductive (OC) layer 32 is provided on the interior surface of the panel and a volatilizable organic photoconductive (OPC) layer 34 overlies the OC layer 32.

Abstract: In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly on an interior surface of a faceplate panel 12 of a color CRT 10 comprises the steps of coating the interior surface of the panel with a volatilizable, organic conductive material to form an organic conductive (OC) layer 32, and overcoating the OC layer 32 with a volatilizable, photoconductive material to form an organic photoconductive (OPC) layer 34. Then, a substantially uniform voltage is established on the OPC layer 34, and selected areas of the OPC layer 34 are exposed to visible light to affect the voltage thereon, without affecting the voltage on the unexposed area of the OPC layer 34. Next, triboelectrically charged, light-absorbing screen structure material is deposited onto the unexposed area of the OPC layer 34 to form a substantially continuous matrix 23 of light-absorbing material having open areas therein.

Abstract: Disclosed is a photosensitive resin composition for use in a light-shielding film, comprising a photosensitive resin and a light-shielding coloring material, wherein light transmission properties after formation of the light-shielding film are controlled by the light-shielding coloring material so that (i) the light transmission through the light-shielding film is 1% or more in at least one wavelength of a light wavelength region of from 330 nm to less than 425 nm, and (ii) the light transmission through the light-shielding film is 2% or less in a light wavelength region of from 425 to 650 nm.

Abstract: In a cathode-ray tube phosphor, a layer consisting of a substantially uniform SiO.sub.2 film or an organic film consisting essentially of at least one type of a polymer selected from the group consisting of an acrylic resin, gelatin, alginic acid, chitosan, and a urea resin is formed as a first layer on the surface of a phosphor particle, and a layer containing at least one type of a metal selected from the group consisting of Zn, Al, and an alkali earth metal and at least one member selected from the group consisting of a colloidal silica, an alumina sol, and a titania sol each having a particle size of 50 nm or less is formed as a second layer on the first layer. This phosphor is excellent in oxidation resistance and dispersibility.

Abstract: A method is disclosed for manufacturing photostencils used in screening the faceplates of color cathode ray tubes. The photostencils are produced as progeny from a parent stencil photo plotted according to the dictates of a proximity photoprinting process in conjunction with the electron optical characteristics of the operational CRT. A rectangular beam is used for radiating light through the pattern of features on the parent stencil onto the photoresist of the progeny stencil. As a result, the features of the progeny stencil differ in size or shape or both, from those of the parent stencil.

Abstract: A method of producing luminescent display screens for CRTs using meniscus coating to apply photosensitive slurries to the faceplate, thereby eliminating material waste, reducing particle contamination and improving coating uniformity.

Abstract: A color reference CRT of the type employing a screen of a pattern of individual phosphor elements of different color components, is produced by adjusting the screen weights of the different color components to achieve the desired reference color when the screen is scanned by an electron beam of predetermined beam current and anode potential.

Abstract: A method of electrophotographically manufacturing a luminescent screen on an interior concave surface of a CRT faceplate panel having a major axis with a first center of curvature and a minor axis with a second center of curvature, the method including the steps of utilizing a charging apparatus for uniformly charging a photoconductive layer disposed on the concave surface of the faceplate panel by providing a corona voltage from a corona generator to at least one corona charger which has an arcuately-shaped charging electrode, the corona charger has a center of curvature substantially concentric with a center of curvature of the concave surface of the panel, a support arm attached to the corona charger is pivotably located at the other center of curvature, the corona charger substantially conforms to, and is spaced from the photoconductive layer on the concave surface, and moving the corona charger across the concave surface.

Abstract: A color reference CRT of the type employing a screen of a pattern of individual phosphor elements of different color components, is produced by adjusting the screen weights of the different color components to achieve the desired reference color when the screen is scanned by an electron beam of predetermined beam current and anode potential.

Abstract: The present invention relates to a method for making a viewing screen structure for a cathode-ray tube. The method includes the steps of coating a support surface with a film of a polymeric material, a suitable dichromate and a sensitizer therefor which is a chromium ion migration enhancer having a reduced sensitivity to thermal and dark hardening; exposing the film to an image in the form of radiant energy until the solubility of the irradiated regions thereof is selectively altered, thereby producing in the film regions of greater solubility and regions of lesser solubility; removing those regions of the film with greater solubility to bare portions of the underlying support surface while retaining those regions of the film with lesser solubility. The bare portions of the support surface and the retained film regions are overcoated with a composition of light-absorbing material which is adherent to the support surface.

Abstract: A manufacturing method of phosphor film of a color cathode ray tube comprising the steps of: forming a photoresist layer on the inner surface of panel provided with black matrix; drying the photoresist layer and exposing it to the light to form a predetermined pattern; spraying phosphor powder, in such a manner that the sprayed area is in the form of stripe having shorter width than the length of the sides of the bottom surface of panel and said sprayed area is moved along the vertical direction or the horizontal direction over the bottom surface of said panel; developing the desired phosphor stripe, in such a manner that compressed air or developing water is supplied on the inner surface of the panel coated with phosphor powder. In the method, the occurrence of the variation of the luminance of the screen due to the local variation of the thickness of the phosphor layer, is prevented, thereby achieving high quality image of the cathode ray tube.

Abstract: 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 phosphor layer and the inner surface of the faceplate and between the black matrix layer and the inner surface of the faceplate. The softening point of the glass is below the temperature at which the tube is subjected during a frit baking step employed in the fabrication of the tube. For example, a borophosphate glass is used as the layer of glass having a low softening point.

Abstract: The disclosure concerns the manufacture of mask type color television tubes. A diaphragm is used, for which the profile or aperture is modified during the operation for the uniform illumination of the vertical stripes of the screen during the different stages for the deposition of luminophors. The modification of the profile is obtained by the shifting of strips parallel to the vertical stripes.

Abstract: A method for forming a phosphor pattern on a panel of a cathode ray tube to prevent the peeling of a black matrix from the glass panel when treated with an inversion solvent which involves forming a protective film of a transparent photosensitive material on a glass panel on which a black matrix is formed and using the so-called outer surface exposure method to produce a color cathode ray tube having high definition.

Abstract: Photosensitive composition for production of repeatably tonable layers for the manufacture of fluorescent screens with a black matrix for color picture tubes, said composition comprising at least one light sensitive 4-(2'-nitrophenyl)-1,4-dihydropyridine compound and at least one organic sulfonic acid.

Abstract: During the formation of a black-matrix layer on the inside surface of a faceplate of a color picture tube, the development of the photoresist coating takes place in an atmosphere with a relative humidity of between about 80-100% and at a temperature of between about 30.degree.-50.degree. C.

Abstract: A method of forming a fluorescent screen for a color CRT, by exposing a photosensitive film on the inner surface of a curved panel, to form color stripes with different stripe widths. A flat mask is used, with slits aligned with the curved panel. The spacing of the mask and the width of the slits are controlled to produce a predetermined pattern factor F according to the expression: ##EQU1## where A is the width of the slits in the mask, b is the distance between the mask and the panel surface, and .lambda. is the wavelength of the exposing light.

Abstract: An optical contact of a patternwise powdery coating layer is improved by permeating a substantially transparent inorganic material having a refractive index of 1.2 to 2.0 into a paternwise powdery coating layer formed on a substrate, thereby forming a mixture layer of the transparent inorganic material and the powdery coating layer between the patternwise powdery coating layer and the substrate.

Abstract: A photoresist film containing a phosphate of a formalin condensate of diazodiphenylamine, 2.5-bis (4'-azide-2'- sulphobenzilidene) cyclopentanone Na, polyvinylalcohol, and polyvinylpyrrolidone is formed on the inner surface of a faceplate. The photoresist film is hardened by light exposure using a point or linear light source, which is essentially a circular light source, via a shadow mask having a large number of apertures. A light absorbing film is formed on this photoresist film. Then the hardened photoresist film and the light absorbing film on top of it are removed using a peeling agent.

Abstract: A high contrast and brightness fluorescent screen of a color picture tube has a light absorbing layer in the form of fine dots or stripes provided for the inner surface of a panel of the tube on which the phosphor layer is formed, and a light reflection layer provided at an interface between the light absorbing layer and the phosphor layer. To manufacture the fluorescent screen, a photosensitive resin layer coated on an inner surface of the panel is exposed to light through a photomask mounted on outside of the panel to form a pattern. Nonluminous light absorbing substance is applied on the pattern to form the light absorbing layers.

Abstract: A method for manufacturing a phosphor screen is disclosed, which includes the steps of coating a photo-sensitive phosphor paste on a necessary portion, exposing the coated photo-sensitive phosphor paste through a photo-mask, and developing the exposed phosphor paste thereby to form a phosphor stripe. Also, a photo-sensitive phosphor paste is disclosed, in which at least one glycol selected from glycol groups of 1, 2-propanediol, 1, 3-propanediol, 1, 3-butanediol, 2-methyl-2, 4-pentanediol and so on is contained with a weight ratio of 0.1 to 2.0 relative to a solid component of polyvinyl alcohol.