Abstract: A DC gas discharge display panel is described, having a cathode which is formed by depositing a metal and/or a metal compound on a substrate of the DC gas discharge display panel or a cathode substrate by the application of plasma spray utilizing plasma generated by the discharge of a rare gas, or a mixed gas of a rare gas and hydrogen and/or nitrogen.

Abstract: A gas discharge display panel for a large screen display in which the display brightness and emission efficiency are very high, the display accuracy is high, and is simple to construct. Cathode electrodes having openings forming discharge cells are arranged in parallel on a front plate and a number of anode electrodes are arranged in parallel on a rear plate orthogonal to the cathode electrodes. Each opening in the cathode electrodes may be rectangular, substantially rectangular or circular. The length of one side of a rectangular opening or the diameter of a circular opening is set to satisfy 40.lambda..sub.e .ltoreq.D.ltoreq.500.lambda..sub.e while the thickness of the cathode electrode is 10.lambda..sub.e .ltoreq.T.ltoreq.100.lambda..sub.e, where .lambda..sub.e is the mean free path of electrons in a gas sealed in the display panel.

Abstract: A gas discharge display panel for a large screen display in which the display brightness and emission efficiency are very high, the display accuracy is high, and is simple to construct. Cathode electrodes having openings forming discharge cells are arranged in parallel on a front plate and a number of anode electrodes are arranged in parallel on a rear plate orthgonal to the cathode electrodes. Each opening in the cathode electrodes may be rectangular, substantially rectangular or circular. The length of one side of a rectangular opening or the diameter of a circular opening is set to satisfy 40.lambda..sub.e .ltoreq.D.ltoreq.500.lambda..sub.e while the thickness of the cathode electrode is 10.lambda..sub.e .ltoreq.T.ltoreq.100.lambda..sub.e, where .lambda..sub.e is the mean free path of electrons in a gas sealed in the display panel.

Abstract: A plasma display panel with an electrode composed of a metal layer (e.g., Fe and Ni) and a metal compound layer (e.g., alkaline earth metal oxide or sulfide, and rare earth metal hexaborides) which are formed by means of plasma spray coating. The plasma spray coating should be done at such a temperature that the metal or metal compound is in the molten state.

Abstract: A gas discharge display panel for a large screen display in which the display brightness and emission efficiency are very high, the display accuracy is high, and is simple to construct. Cathode electrodes having openings forming discharge cells are arranged in parallel on a front plate and a number of anode electrodes are arranged in parallel on a rear plate orthogonal to the cathode electrodes. Each opening in the cathode electrodes may be rectangular, substantially rectangular or circular. The length of one side of a rectangular opening or the diameter of a circular opening is set to satisfy 40.lambda..sub.e .ltoreq.D.ltoreq.500.lambda..sub.e while the thickness of the cathode electrode is 10.lambda..sub.e .ltoreq.T.ltoreq.100.lambda..sub.e, where .lambda..sub.e is the mean free path of electrons in a gas sealed in the display panel.

Abstract: Disclosed is a gas-discharge display panel having plural discharge cells arranged in a matrix. Each of the discharge cells is provided with a hot cathode consisting of conductive material having a shape which provides a heat capacity and heat conductivity as small as possible. Each cathode is coated by an electron emissive material having a small work function. As a result, the hot cathode can be heated to a required working temperature solely by the bombardment of particles contained in a discharge current itself, without requiring any externally supplied heating power to obtain a highly efficient use of applied driving power.

Abstract: A gas-discharge display panel comprises plural elongated minute gas-discharge cells arranged in matrix directly on inner faces of front and rear insulator plates, on opposite sides of which cells elongated anodes and cathodes are disposed respectively and which cells are driven by igniting pulses, sustaining pulse-trains and erasing pulses in response to picture signals to be displayed. In these cells glows appear closely by both of anodes and cathodes and excite fluorescent layers which are disposed on cell-walls at the closest distance, so that very high brightness and efficiency of gas-discharge display can be obtained with a simple structure, and further a memory function of gas-discharge can be effected by virtue of the sustaining pulse-trains.

Abstract: A gaseous discharge display panel of multi-layer construction comprises a transparent front sheet, a rear sheet, an intermediate sheet inserted between the front and rear sheets, said intermediate sheet having a number of elongated recesses for confining a number of discharge spaces extending in a plane of the intermediate sheet in parallel with each other and a number of through holes or recesses for constructing a number of communication channels, a number of anodes each arranged near one of the respective discharge space, a number of hollow cathodes arranged above the rear sheets, the other ends of the discharge spaces being communicated with the hollow cathodes through said communication channels, and a number of fluorescent layers applied on inner surfaces of the recesses formed in the intermediate sheet for confining the discharge spaces. The front, intermediate and rear sheets are connected to each other to form a hermetically sealed envelope and an ionizable gas is contained in the envelope.

Abstract: A pulse width luminance modulation system for driving a gas discharge panel in line at a time. The driving circuit for the discharge cell comprises a CR time constant element in order to enlarge the contrast range of the picture to be displayed. The discharge cell is caused to produce glow discharge when the pulse width of the pulse width modulation driving pulse is wider than a certain value depending on the CR time constant to produce normal pulse width luminance modulation of the glow discharge, and the discharge cell is caused to produce instantaneous irradiation of which the intensity is dependent on a stored charge in the capacitive element C of the CR element when the driving pulse width is narrower than the certain value so as to widen the low luminance range and by suitably selecting the value of the CR element for obtaining continuity of the two luminance characteristics, and further the input signal for making luminance modulation is applied with a correction in order to make the .gamma.

Abstract: A gaseous discharge display panel in which in order to display images of good quality with high brightness and high efficiency a discharge unit constituting of a picture element of the display panel is formed as an elongated fine section extending in parallel to the display plane and discharge is produced in the longitudinal direction of the discharge unit so as to display images with the aid of plane discharge. Particularly in order to display color images on the front and/or rear side of the discharge unit there is arranged an insulating sheet to which fluorescent materials are applied in such a manner that the fluorescent materials are opposed near a discharge plasma with a large area and an ultra-violet ray produced by the discharge can excite efficiently the fluorescent materials.