Abstract:
PURPOSE: A cooling device is provided to achieve improved cooling efficiency and prevent a degradation of luminance of a phosphor screen. CONSTITUTION: A cooling device comprises a coupler body(21) assembled to the front of a projection cathode ray tube(10); a coolant circulation pipe(27) wound along the coupler body; and a coolant filling the coupler body and the coolant circulation pipe. The cooling device cools the heat generated from a phosphor screen(12) of the projection cathode ray tube. The coolant circulation pipe is communicated to the coupler body.
Abstract:
PURPOSE:To make the manufacture simplified and economized, by making the control electrode to be of such structure that a number of individual electrodes provided with round holes therein are horizontally disposed being separated from each other. CONSTITUTION:The G1 electrode 24 is divided into individual electrodes in the number larger than the number of the horizontal picture elements. A video signal is applied to each of the individual electrodes and a beam from the filament cathode 23 is modulated thereby. The horizontally disposed beam spots are accelerated and at the same time converged by G2 25, G3 26, and G4 27, and deflected by the main deflecting device formed between the vertical backup deflector 28 plus the backside electorde 29 and the phosphor screen 31. The phosphor screen is provided with red R, green G, and blue B phosphor stripes repeatedly disposed thereon at constant intervals. At the horizontally outermost end of the screen, the index phosphor stripes of two colors 35, 36 are formed, and it is adapted so that signals from the index phosphor stripes control the beam to correctly scan over the respective phosphor stripes.
Abstract:
PURPOSE:To keep off the unsteadiness of deflection in a flat type cathode-ray tube that makes a deflecting signal voltage so as to be overlapped by means of capacitive coupling, by installing an electron beam regulating member between an electrostatic deflecting plate and an electrode at the final stage of an electron gun. CONSTITUTION:A beam regulating member 14 shielding a deflecting plate 9a from the impact of an electron beam is installed between a couple of electrostatic deflecting plates 9a, 9b and an electrode fourth grid G4 at the final stage of an electron gun 4. This beam regulating member 14 is given the same voltage as the side of a deflecting plate 9b given a fixed voltage, for example, the identical voltage VRH as an opposite electrode 3. If positional adjustment for a beam's range by a centering magnet takes place, such a matter that a beam current flows into the deflecting plate 9a can be effectively avoided, and in combination with the fact that centering adjustment can be fully achieved, a beam's landing signal on top of a phosphor screen 3 can be steadily set in a highly accurate manner.
Abstract:
A display device is provided with a display screen (30) for displaying image information, having a predetermined number of luminescent picture elements (35). In operation, an electron beam (45) is generated by an electron gun (40) and entered into a two-dimensional slalom guide (10), wherein the beam is guided in two mutually perpendicular directions by means of slalom focusing. Subsequently, the electron beam (45) is extracted from a selected cell (56) of the slalom guide (10) towards a corresponding picture element (35). The path of the electron beam (45) in the slalom guide (10) can be fully customized within the guidance plane. Preferably, the guidance plane extends substantially parallel to the display screen (30).
Abstract:
Picture display device of the thin-panel type, with a luminescent screen (7), electron source means and an addressing system (100) arranged between these means and the screen. Electrons are directed towards desired locations on the luminescent screen by means of the addressing system. A spacer plate (101) of electrically insulating material, with apertures for passing the electrons, is present between the addressing system and the screen. The spacer plate consists of a material having an electrical resistance R (in Φ cm) which complies with the requirement log R (250 °C) » 8.
Abstract:
A flat panel display (11), having at one edge a linear array of electron guns (16) incorporating field emission cathodes (17, 18, 19). Each of the field emission electron guns is individually addressable, and all are simultaneously addressable. A deflecting structure (28) is provided to deflect electron beams issuing simultaneously from the guns toward a phosphor-coated display screen (12) to simultaneously address an entire column of pixels on the screen. All columns of a raster scan are sequentially addressed to thereby form the full raster scan. A beam alignment/calibration structure is included to enable correction of any deviation of a beam from a desired intensity or alignment.
Abstract:
Canon à plusieurs faisceaux d'électrons dans lequel une paire d'électrodes extérieures d'un organe de déviation (C) faisant converger une pluralité de faisceaux d'électrons sont divisées en deux à l'avant et à l'arrière dans le sens de déplacement des faisceaux d'électrons pour corriger la convergence dynamique des faisceaux d'électrons en utilisant les électrodes (C3B), (C1) et (C4B), (C2).
Abstract:
Dans un tube à rayons cathodiques plat une première et une seconde électrodes (2, 3) sont formées en des positions à l'intérieur d'un corps tubulaire plat (1) face à face de part et d'autre de l'épaisseur pour former un premier système de déflexion, une surface fluorescente (4) est formée sur la première électrode (2), et un second système de déflexion (6) pour une déflexion électromagnétique est prévu entre le premier système de déflexion et un canon à électrons (5). Une troisième électrode (10) qui entoure la région du second système de déflexion (6) pour le recouvrir suffisamment est formée de manière solidaire avec la seconde électrode (3), et une tension inférieure à celle de la première électrode (2) est envoyée sur la seconde et sur la troisième électrodes (3, 10). Ce tube à rayon cathodique peut réduire la consommation d'énergie et supprimer la distorsion des arcs circulaires.