Abstract:
A gradient filter is disclosed which is adapted to compensate for the variation of beam divergence of diode lasers. The gradient filter comprises a substrate having a transmission density distribution along at least one axis which is inversely proportional to a Gaussian intensity distribution along the axis. Such a gradient filter has a transmission profile which is transparent, or nearly so, at the center of the beam and which falls gradually to zero transmission in an area spaced from the center.
Abstract:
A photochromic material adapted for coating light transmissive materials. The photochromic material contains photosensitive silver halide crystals having dimensions in the range of approximately 50 Angstroms to 800 Angstroms. The silver halide crystals are surface doped with copper ions and another sensitizer selected from mild reducing agents or sulfur-bearing ions. The crystals are dispersed in a protective polymer that does not irreversibly bind halogen.
Abstract:
In a high-precision color filter (14) having excellent properties of the present invention, a dye (4) is deposited in the pores (3) of an active membrane layer (2) composed of at least one of active alumina and active silica and formed on a transparent substrate (1), so that fine dot patterns, striped patterns or other desired patterns of a desired color can be formed on the same plane of said active membrane layer (2) and an over-coat layer (6) having no affinity with the dye (4) is formed further thereon. A step of forming the above-mentioned patterns in the production of the color filter (14) of the present invention comprises placing a metal mask having predetermined pattern holes on said active membrane layer (2), putting thereon a transfer sheet having an ink layer containing the dye (4) and heating the sheet in an atmosphere under a reduced pressure. In accordance with the present invention, a color filter (14) can be obtained which has excellent properties such as flatness, heat resistance, water-proofness or light resistance, and a fine pattern having excellent spectral characteristics of red, green and blue, and can be produced by a simple production process.
Abstract:
A method of manufacturing a color filter having a transparent electrode (3) on a transparent substrate (2), and a colored layer formed on the electrode and capable of transmitting light in a specific wavelength region. This manufacturing method comprises the steps of bringing the transparent electrode (3) into contact with a film-forming solution (1) of an electrolyte with dispersed pigment particles; and applying a voltage to electrolyze the solution (1) between the electrode (3) and a submerged electrode (4) so that a colored layer may be formed on the transparent electrodes (3). The contact of the electrode (3) with the solution (3) may be achieved by placing the electrode (3) into or onto the solution (1).
Abstract:
A polymerizable composition for use in producing color filters comprising a (meth)acrylic copolymer having an alicyclic (meth)acryloyl group in each of the side chains, a compound having at least one ethylenic unsaturation, a photopolymerization initiator and a color material; a color filter produced by coating a glass substrate with the composition, followed by light exposure and development; and a process for producing a color filter by coating a glass substrate with the composition, followed by light exposure and development. As this composition is highly sensitive and excellent in chemical resistance, it can provide a high-quality color filter without the necessity for protecting the same with, for example, an oxygen barrier film.
Abstract:
A multiple-color filter array (94) useful as part of a flat panel display system of either a projection (50) or direct view (70) type is constructed using reflection holography techniques. The filter array includes multiple-color filter elements (110, 114, 116) that reflect wavelengths of light corresponding to colors outside of a color band of interest. Redundant sets of first, second, and third wavelengths selective reflective color filter elements are arranged in stripes to transmit light of the three primary colors red, green, and blue. The three-color filter array is constructed in a single layer (122) of holographic recording material during one sequence of three separate exposures, one for each color filter element. A preferred flat panel display system (200) includes a liquid cristal variable optical retarder of the supertwisted nematic (STN) type. The direct view system includes a spurious light reflection absorber (204), one of whose optical components is selected in association with the residual retardation compensator plate (214) of the preferred liquid crystal variable optical retarder.
Abstract:
A color filter using an organic pigment the primary particles of which have a mean particle diameter of 20 to 200 nm and a particle diameter distribution of within ± 35 nm, and which has a color difference of within 5 after exposure to illumination of at least 100,000 lux for at least 100 hours at a surface temperature of not lower than 50 °C; a color filter which has a transmission factor ratio (T485/T610) of up to 3.5 between a transmission factor (T485) of a green pigment film for a wavelength of 485 nm and a transmission factor (T610) for a wavelength of 610 nm, has a maximum transmission factor of the pigment film of at least 60 % and has a wavelength of the maximum transmission factor of 540 to 550 nm; and a color filter using specific organic pigments as pigments for red, green and blue. The color filters have high light fastness and heat resistance to withstand the use of a high illumination light source, and can be utilized for a liquid crystal projector, and so forth.
Abstract:
A color filter particularly suitable to devices (1) for color liquid crystal display. Colored picture elements (8, 9, 10) made of transparent resins in which pigments are dispersed are formed on a transparent substrate (6). The filter has, on the colored picture elements, a protective film (11) a coat of cured photopolymerizing resin composite material which includes at least photopolymerizing acrylate oligomers and multifunctional photopolymerizing acrylate monomers. The filter is excellent in heat-proof, light-proof and in the quality of displaying.
Abstract:
A color filter overcoating material for a liquid crystal display characterized by comprising a water-soluble photopolymerizable substance, a cationically polymerizable water-insoluble photopolymerizable substance, a photopolymerization initiator, and a photocuring catalyst precursor; and a color filter material comprising said overcoating material and a colorant. A process for forming a color filter overcoat or a color filter, characterized by coating a substrate with the color filter overcoating material or color filter material, followed by exposure and development with an aqueous alkali solution.