Abstract: A multilayer antireflective coating is applied to the outer surface of a video display panel such as a cathode ray tube (CRT) or a flat panel display in the form of successive thin layers each having a different light refractive index, where the light refractive index of each layer decreases in the direction away from the surface of the display panel and toward the outer layer of the coating. Each layer is formed from the same starting gel materials, with the degree of crosslinking of each gel layer varied to provide the desired light refractive index for reducing reflections from the display panel's outer surface over a wide spectrum. The extent of crosslinking and thus the individual layer's light refractive index is varied by controlling the aging of the gel, with longer aging providing increased crosslinking and larger molecular weight for a lower light refractive index. For example, silica gels aged over different time periods provide gels having a light refractive index ranging from 1.

Abstract: The outer surface of the glass display panel of a cathode ray tube (CRT) is first coated with an antistatic conductive metal salt solution. A water or organic solvent soluble antireflective coating is then applied by conventional means such as spinning, spraying or dipping to the glass display panel over the first coating. The antireflective coating is comprised of either an organic or an inorganic salt, or a polymer. The coated display panel is then baked, followed by thorough washing with either water in the case of an organic or inorganic salt or water soluble polymer antireflective coating, or toluene in the case of a non-water soluble polymer antireflective coating. Washing the display panel partially dissolves the salt or polymer in the antireflective coating more on the outer surface of the coating than on the inner portion of the coat adjacent the glass facelate.

Abstract: The inner surface of a video display panel such as cathode ray tube (CRT) glass faceplate is initially coated with a mixture of one of the primary color phosphors, an organic binder such as polyvinyl alcohol (PVA) diluted with water, and a photoresist agent. The organic binder overcomes the poor adhesion to the glass faceplate of the photoresist which typically includes polyvinyl pyrrolidone (PVP) and reduces the oxygen which decreases phosphor exposure time. To overcome PVA and PVP incompatibilities which give rise to nonuniform film thickness, a vinyl pyrrolidone-vinyl alcohol (VP-VA) copolymer is added to the phosphor, organic binder and photoresist mixture in the range of 0.1-30 wt %. The copolymer with both the VP and VA functioning groups serves as a coupling agent between the PVA and PVP and eliminates incompatibilities between these components. The VP-VA copolymer preferably has a VP/VA mole ratio in the range of 20/80 to 80/20.

Abstract: A multilayer antireflective coating is applied to the outer surface of a video display panel such as a cathode ray tube (CRT) or a flat panel display in the form of successive thin layers each having a different light refractive index, where the light refractive index of each layer decreases in the direction away from the surface of the display panel and toward the outer layer of the coating. Each layer is formed from the same starting gel materials, with the degree of crosslinking of each gel layer varied to provide the desired light refractive index for reducing reflections from the display panel's outer surface over a wide spectrum. The extent of crosslinking and thus the individual layer's light refractive index is varied by controlling the aging of the gel, with longer aging providing increased crosslinking and larger molecular weight for a lower light refractive index. For example, silica gels aged over different time periods provide gels having a light refractive index ranging from 1.

Abstract: For use in a self-emitting color display device such as a cathode ray tube (CRT) having a display screen with a phosphor coating on its inner surface, a surface coating disposed on the display screen's outer surface affords improved color purity, or contrast, by reducing overlap in the color spectrum between two adjacent primary colors, i.e., between red and green and/or between green and blue. An organic dye is added to either an inner antistatic layer or an outer antireflective layer of an antireflective/antistatic outer coating on the display screen, where both of the aforementioned layers contain silane. The dye functions as a color filter absorbing only light within the frequency range between adjacent primary colors, such as between the red and green color phosphors, i.e., in the range of 460-500 nm, and/or between the green and blue color phosphors, i.e., in the range of 560-600 nm. A silane coupling agent is also added to serve as a binding agent bridging the organic dye and silane together.

Abstract: An antiglare/antistatic coating for a cathode ray tube (CRT) is applied to the outer surface of the CRT's faceplate and includes a first inner hygroscopic layer of silane, water, sulfuric acid and an alcohol mixture which may be applied by dipping, spinning or spraying. The coating further includes a second outer layer of silanes, water, acid, epoxy, and a coupling agent balanced with an alcohol mixture which is sprayed onto the first inner layer. The grounded first inner layer possesses high conductivity for antistatic protection, while the second outer layer, which possesses glass-like characteristics, provides antiglare protection by reducing the faceplate's reflectivity. The second outer layer dries as a hard porous coating which resists scratching and allows water vapor to penetrate into the first inner hygroscopic layer to maintain its high conductivity.

Abstract: An antiglare/antistatic coating for a cathode ray tube (CRT) is applied to the outer surface of the CRT's faceplate and includes a first inner hygroscopic layer of silane, water, sulfuric acid and an alcohol mixture which may be applied by dipping, spinning or spraying. The coating further includes a second outer layer of silanes, water, acid, epoxy, and a coupling agent balanced with an alcohol mixture which is sprayed onto the first inner layer. The grounded first inner layer possesses high conductivity for antistatic protection, while the second outer layer, which possesses glass-like characteristics, provides antiglare protection by reducing the faceplate's reflectivity. The second outer layer dries as a hard porous coating which resists scratching and allows water vapor to penetrate into the first inner hygroscopic layer to maintain its high conductivity.

Abstract: A polyvinyl alcohol graft terpolymer comprises 70-30% by weight of polyvinyl alcohol and 30-70% by weight of acrylate/maleic anhydride copolymer having 95-30 mole % of acrylate and 50-70 mole % of maleic anhydride, which is prepared by a condensation-coupling reaction through esterification being performed between the hydroxy groups of the polyvinyl alcohol and the anhydride groups of the acrylate/maleic anhydride copolymer. The polyvinyl alcohol graft terpolymer may be further subjected to a heat treatment to have better water resistance and mechanical properties due to the interchain ester linkage between the hydroxyl groups and the anhydride groups therein. Alternatively, the polyvinyl alcohol graft terpolymer may be reacted with an amine to produce a maleamic acid intermediate, and then dehydated to form a maleimide derivative.