Abstract: A fluorescent display device including a graphic display section and a segment display section capable of being highly simplified in construction and readily manufactured at a low cost. The fluorescent display device includes control electrode structures for both display sections each of which is constituted by a plurality of linear control electrodes divided into predetermined groups.
Abstract: A target assembly for a projection cathode ray tube is provided wherein the target member is cooled by convective fluid heat transfer occurring within and around a partially hollow support shaft screw. The target member is a solid block of relatively high, thermally conductive material, such as aluminum, coated with an electron beam sensitive material. The shaft screw also comprises relatively high thermally conductive material, such as copper, and has an internal passage leading from a source of cooling fluid, such as dry air, to a annular array of ports located in a distal portion of the supporting shaft screw. The distal portion of the shaft screw has a flaring cross section for increased heat transfer. A bellows encloses the distal portion forming a passageway so as to cause the cooling fluid to also flow along the external surface of the shaft screw. This arrangement adds to the effective convective heat transfer from the shaft screw to the cooling fluid.
Abstract: A color cathode ray unit which includes an in-line type electron gun, a deflection yoke disposed on the color CRT so as to generate substantially uniform horizontal and vertical deflection magnetic fields, thereby ensuring that an axially unsymmetrical lens electric field is dynamically generated between a first and a second focusing grid thereby correcting a distortion of electron beams caused by a magnetic field leaking from a dynamic convergence means.
Abstract: A shadow mask type color cathode ray tube which has a face panel whose screen face is flattened to more than two times the flatness of the conventional flat panels without reducing the resistance of the glass bulb to outside pressure in spite of its relatively thin glass wall, and has an enhanced reflection characteristic of incident light as well as improved local doming characteristics.
March 13, 1991
Date of Patent:
October 13, 1992
Matsushita Electric Industrial Co., Ltd.
Abstract: A display device comprising a display screen, and an optical film formed on the display screen and having a porous lower layer mainly consisting of TiO.sub.2 and having a porosity of 30% to 75% and an average pore size of 10 nm or less and an upper layer stacked on the lower layer and essentially consisting of a silicon compound having a fluorine-containing group and a siloxane bond. In this display device, the optical film can be easily formed and has a satisfactory anti-reflection effect and satisfactory strength.
Abstract: A light emitting diode for a photosensor is so constructed that ambient temperature drifts are prevented from adversely affecting a measurment. The light emitting diode for a photosensor has a substrate (12) carrying a light emitting element (LED.sub.2) and a light receiving element (PD) for sensing light emitted by the light emitting element (LED.sub.2) thereby to detect a change in the amount of light from the light coming emitting element (LED.sub.2) in accordance with a change in the ambient temperature. For this purpose a first transparent layer (21) is provided on the substrate (12) to cover the light emitting element and the light receiving element (PD). A second transparent layer (22) is provided on the first transparent layer (21). A very thin air layer is interposed between the first and second transparent layer.
Abstract: A cathode ray tube (CRT) having a surface with reduced gloss and reflectivity and a method for providing such reduced gloss and reflectivity. In the method of the invention, a solution of a silane and a saturated hydrocarbon in a solvent system of an alcohol and water is provided. The solution is applied to the surface of a cathode ray tube to impart antiglare properties to the surface. Thereafter, the CRT with the silane applied is cured at an elevated temperature for a period of time sufficient to cause the silane to react and be converted to siloxane.
Abstract: A plasma display panel comprises two substrates and a plurality of striped anodes and cathodes arranged on the substrate in X/Y matrix form. A method of manufacturing the PDP comprises the consecutive steps of forming a plurality of striped first cathode elements, forming a plurality of insulating wall bodies, an completing the cathode units. The PDP has a much higher cathode current than the conventional PDPs and realizes a pictorial image of uniform luminance throughout the whole screen.
Abstract: Apparatus for high speed analog data recording utilizing a new tube design (referred to herein as a photonic cathode ray tube) is presented. The photonic cathode ray tube includes a flat photocathode, a small aperture electron lensing system, a set of deflection plates and a phosphor screen.
Abstract: An electrode for a cold cathode discharge lamp, has several parallel recesses extending across the width of the electrode and at an angle of about 35 degrees away from the normal to its surface. The electrode may be formed by folding a strip of metal so that the recesses are formed between adjacent folds of the strip. Alternatively, the electrode may be a block of metal in which the recesses are slots formed in a surface of the block. The electrode may be included in a tubular lamp or in a planar lamp.
March 12, 1991
Date of Patent:
August 25, 1992
Smiths Industries Public Limited Company
Abstract: An automotive lamp comprises a glass bulb having a filament and a light interference film formed on the surface of the glass bulb. The light interference film has a high-refractive index layer and a low-refractive index layer alternately stacked on each other. Each layer has a refractive index ni and a thickness di, wherein i is equal to 1, 2, . . . k. In this case, nidi is equal to (1.+-.0.025)n.sub.2 d.sub.2, wherein i is equal to 3.about.(k-1), n.sub.1 d.sub.1 is equal to (1.+-.0.025)n.sub.2 d.sub.2, and n.sub.k d.sub.k is equal to (1.+-.0.025)n.sub.2 d.sub.2. The maximum value of the reflectance of the film is more than 91% within visible light range, and the 50% transmitting wavelength is from 515 nm to 542 nm.
Abstract: A cathode ray tube comprising an electron gun having a number of electrodes with securing members and a number of supports of electrically insulating material, said supports and electrodes being interconnected by means of serrated clamping members. By virtue of this construction, the microphonic behavior of the electron gun is improved.
Abstract: A plasma display device comprises two plates defining a gas filled space therebetween, striped anodes and cathodes, wherein the cathodes are composed of a first cathode element and a second cathode element, and a sealing layer. The second cathode is formed on said first cathode element. The sealing layer is formed between the cathodes to prevent the first element from being exposed to the gas filled space. The device forms a high-quality picture by minimizing the difference in luminance between pixels.
Abstract: A miniature incandescent lamp assembly has an elongated substantially cylindrical glass envelope having a first end and a second end. A substantially cylindrical first metal end member seals the first end of the glass envelope with a seal of substantially cylindrical configuration where the glass of the envelope is in glass-to-metal contact with the first metal end member. A substantially cylindrical second metal end member seals the second end of the glass envelope with another seal of substantially cylindrical configuration. In this seal also, the glass of the envelope is in glass-to-metal contact with the second metal end member. An incandescent filament is disposed between the first and second metal end members within the interior of the glass envelope in electrical contact with the first and second metal end members. Each of the first and second metal end members has a metal cap attached to the outside of the glass envelope, with the metal caps being larger in diameter than the glass envelope.
Abstract: A prescribed amount of tin halide is sealed in the arc tube of a metal halide lamp wherein a given amount of metal halide including a target amount of halogen and at least a predetermined amount of rare earth metal is sealed in the arc tube thereof to maintain a high lumen maintenance factor for an extended operation period. The prescribed amount of tin halide is preferably within 4.6.about.234 mol % of the predetermined amount of rare earth metal.
Abstract: Photomultiplier tube (10) segmented into a plurality of elementary photomultipliers (11), comprising a photocathode (12), a plurality of elementary electron multipliers (13) of the "apertured sheet" type, and a plurality of focusing electrodes (14) providing the convergence of the photoelectrons emitted by the photocathode (12) towards the elementary multiplier (13). In accordance with the invention, the homologous sheets (15) of the elementary multipliers are realised on one single segmented conductor wafer (16) having a neutral zone (17) separating the active apertured zones (18) constituting the different multipliers (13). The said focusing electrodes (14) can be made from one single conductor sheet (19) in which feedthrough apertures (20) are punched through which the photoelectrons are passed towards the elementary multipliers (13).
Abstract: A dispenser cathode comprises an electron emissive materials, a porous base body containing tungsten, a reservoir storing the porous base body, and a sleeve storing the heater therein. The porous base body contains TiO.sub.2 or ZrO.sub.2. The dispenser cathode achieves high luminance and high definiteness required by a large-sized display and the time for manufacturing the cathode is reduced.
Abstract: A high-quality projection cathode ray tube is for projecting the image, displayed on a fluorescent surface, as an enlarged image on a screen in front of the fluorescent surface through a projection lens disposed at a given distance ahead. On the inner surface of a face panel, a multilayer optical interference film including optical thin film layers of alternately superimposed high refractive and low refracte index material is provided. The outermost surface of the multilayer optical interference film is coated with a film of an inorganic material such as silicon dioxide which is optically transparent and stable with respect to the impact of an electron beam. The thickness of the transparent film is not less than 1.0 .mu.m. Even an electron beam having a high energy which has passed through the gaps of the phosphor layer loses the energy in this protective film.
Abstract: A tri-model thermal switch for use in a preheat-type discharge lamp. The thermal switch includes a glass bulb, first and second electrical leads sealed into and passing through the glass bulb, and a bimetallic element disposed within the bulb and having first and second end portions. The first end portion of the bimetallic element is affixed to the first electrical lead while the second end portion of the bimetallic element is formed to be in contact with the second electrical lead at a first elevated temperature higher than ambient temperature. The bimetallic element is spaced from the second electrical lead at ambient temperature and at a second elevated temperature higher than the first elevated temperature. During lamp operation, the thermal switch produces a double hot spot on the cathode by electrically shorting the cathode lead-in wires. As a result, the electrode temperature is lowered sufficiently to cause an improvement in the lumen maintenance and life of the lamp.
Abstract: A discharge lamp unit in which a pair of terminal and lead support assemblies (A, B), composed of a pair of metal connector terminals (123, 125) and a pair of metal lead supports (122, 124), are fixedly held by a molded resin lamp holder (120) in such a manner that the connector terminals (123, 125) extend from the rear surface of the lamp holder while the lead supports (122, 124) extend from the front surface of the lamp holder to support a discharge lamp (110). The lamp holder has an axial through-hole formed therein during the molding of the lamp holder in a metal mold in such a manner that the axial through-hole is located between the connector terminals of the terminal and lead support assemblies, whereby the lamp holder is enhanced in dielectric strength.