摘要:
The invention incorporates a method of manufacturing a CRT that comprises the application of an internal conductive coating formulation by a flowcoating process on a portion of an interior surface of a funnel and on an interior portion of a neck of the CRT. The formulation comprises iron oxide, graphite, a silicate, a copolymer, surfactant and water. In a preferred embodiment, the copolymer is a maleic copolymer.
摘要:
The present invention relates to a transparent conductive thin film and a method for the preparation of the same., and more particularly to a method for the preparation of a transparent conductive thin film comprising the steps of a) preparing a sol solution of antimony-tin oxides (ATO) or indium-tin oxides (ITO), b) forming a transparent coating layer on an outer surface of a cathode ray tube using the sol solution, and c) rapidly increasing a temperature of the transparent coating layer to a predetermined temperature of 300 to 1200° C., and rapidly cooling the transparent coating layer either immediately or after maintaining the predetermined temperature for up to 20 seconds, and a transparent conductive thin film prepared by this preparation method, i.e., a transparent conductive thin film which not only has superior conductivity, high hardness, and non-reflectivity but also saves production process time and increases production process effectiveness, and a method for the preparation of the same.
摘要:
A conductive anti-reflection film is disclosed, that comprises a first layer containing first conductive particles and a second layer disposed for covering the first layer, the second layer containing SiO2 and second conductive particles. A conductive anti-reflection film prevents the AEF (Alternating Electric Field) from taking place and light from reflecting and allows the front surface to be conductive. In addition, the conductive anti-reflection film has high productivity and high durability. A cathode ray tube displays a high quality picture for a long service life.
摘要:
Electrically insulating surfaces of an image intensifier are covered with a film of an organic material. This improves the high-voltage behavior of the image intensifier. The image intensifier further has an anode hung by means of insulating rods, which rods are covered by the film.
摘要:
An electron beam focusing device for use in a cathode ray tube (CRT) including a first and a second conductor film each formed on the inner surface of a neck portion of the CRT, which are spaced apart from each other by a predetermined distance, and a resistive conductor film which connects the first and second conductor films with each other. The first conductor film is located before the second conductor film in a beam travelling direction. The additional conductor film has a higher resistivity than that of the first and second conductor films. The first conductor film is set at a higher potential than the second conductor film. A dark current flowing from a high potential side through the first conductor film, the resistive conductor film and the second conductor film produces a voltage drop across the resistive conductor film so that the surface potential of the resistive conductor film is stabilized, thus forming an electrostatic lens with a stabilized electric field.
摘要:
A cathode-ray tube has in a neck section of a hermetically sealed, evacuated envelope an electron-gun mount assembly in which of a cathode for emitting an electron beam, a first grid electrode section for forming a crossover point and for accelerating the electron beam and a second grid electrode section for focusing the electron beam are mounted on a plurality of insulative supporting bars. A conductive member is provided on an outer surface portion of the neck section, an inner surface portion thereof, and/or an outer surface portion of the supporting bars which surround a portion of the electron-gun mount assembly including the first grid electrode section but excepting the second grid electrode section.
摘要:
An image tube comprises a conductive film along the inside surface of an insulating tube extending axially of the image tube between a photoelectric cathode and a fluorescent anode. The conductive film should be electrically connected to the photoelectric cathode and have an axial length between 1/2 and 3/4 of that of the insulating tube. The conductive film may be formed along the outside surface of the insulating tube and either together with or without a conventional semi-insulating layer formed along the inside surface of the insulating tube.
摘要:
The disclosure depicts in a television cathode ray tube having a getter containing a vaporizable, electrically conductive, gas adsorptive getter material, an improvement comprising an electrically resistive element for arc suppression, an electrically resistive element for arc suppression, internal voltage division, static elimination, RC signal coupling or the like. The resistive element is composed of a high resistivity material compatible with a clean, high-vacuum environment. The element is so widely and deeply cavitated and contorted at and below its nominal surface that the real surface of the element is shadowed and very greatly extended in area relative to the nominal surface of the element. The effect of this is that when the getter is flashed, the coating of conductive getter material deposited on the element is effectively dispersed and fragmented into isolated conductive islands. The result is to render tolerably insignificant the tendency of arc currents to travel over the surface of the element and thereby by-pass the body of the element.
摘要:
A cathode ray tube having a glass envelope with a conductive layer covering a portion of the inner surface of the envelope. The major part of the surface covered by the conductive layer is relatively rough to obtain good adhesion of the conductive layer. An electrode within the tube is connected electrically to the conductive layer by a contact spring that presses against a limited region of the conductive layer. The area of the glass surface that is directly behind this limited region is made sufficiently smooth to prevent the contact spring from being held out of engagement with the conductive layer by glass protuberances projecting through the conductive layer and causing arcing between the contact spring and adjacent areas of the conductive layer.
摘要:
Internal arcing in a cathode ray tube is substantially prevented by coating a portion of the interior of the funnel and neck of the tube with an electrically conductive composition, and coating a portion of the interior of the funnel and neck of the tube with an electrically resistive composition. The electrically conductive composition comprises about 10-30 weight percent iron and about 90-70 weight percent of a glass frit. The electrically resistive composition comprises about 8-24 weight percent iron, about 2-8 weight percent TiO.sub.2 and about 90-68 weight percent glass frit. The use of conventional "dag" coatings is eliminated. The cathode ray tube is especially useful as a picture tube in a color television receiver in which high operating voltages are employed.