Abstract:
Apparatus for providing a visual display screen of the type formed from a plurality of gas cells wherein electrical voltages are capacitively coupled to selected cells to cause gas ignition and subsequent light emission, and wherein a preselected and repeatable pattern of color phosphor is deposited on selected cell surfaces in predetermined amounts to form a means for selecting any color and intensity combination over a wide range.
Abstract:
A gas discharge display/storage apparatus in which a multicolor display is achieved utilizing an arrangement of the triad cell configuration. The triad cell configuration may be positioned on a transparent filter sheet or may be represented by polychromatic phosphor cells formed on the inner surface of the gas discharge display storage apparatus. The triad arrangement representing basic colors of red, blue and green is addressed by horizontal conductors which thread through each of the three cells in the triad arrangement, while the vertical conductors are arrayed in groups of three, each conductor threading the cells of a specific color. The panel can thereby be constructed substantially as a conventional black and white plasma display device, and conventional addressing techniques may be utilized to provide a plasma display with multicolor capability.
Abstract:
A flat display panel is disclosed which comprises an insulating substrate provided with a plurality of parallel slots, a plurality of anodes for subsidiary discharge each of which is disposed in each of the slots, a plurality of anode lines for main discharge disposed upon the insulating substrate, an insulating layer laid over the anode lines and provided with a plurality of openings so as to expose only the desired portions of the anode lines, a plurality of cathode plates disposed in contact with the insulating layer at right angles to the slots of the insulating substrate and provided with a plurality of through holes so as to expose said desired portions of the anode lines through the openings of the insulating layer, a transparent insulating substrate disposed in contact with the cathode plates, a gas hermetically sealed in the slots and through holes, a phosphor material disposed upon the insulating layer within the through holes of the cathode plates, and a plurality of communication passages hydraulically interconnecting between the slots and the through holes, the slots defining the subsidiary discharge spaces while the through holes, the main discharge spaces.
Abstract:
A gas discharge display panel for efficiently reproducing a color picture having high brightness and high definition. The display panel comprises a plurality of picture elements arranged in matrix. Each picture element is formed by a set of three discharge units reproducing red, green and blue light respectively. Each discharge unit is coupled to a hollow cathode. The hollow cathode of a suitable size is divided into two portions, i.e., a set of display hollow cathodes each of which forms main part of the discharge unit, and a scanning hollow cathode which couples the set of display hollow cathodes and operates for obtaining preparatory discharge. Said two portions of the hollow cathode are jointly operated so as to obtain a large discharge current supply at low voltage and in a small surface area. Thus a practical gas discharge display panel having high density discharge unit arrangement is realized and which is able to increase the luminance by about several tens of per cent more than the conventional one and also being able to be assembled in a simple manner by simplifying the panel construction with unified parts.
Abstract:
A display panel includes a plurality of cells containing a phosphor material sensitive to ultraviolet light and an ionizable gas which has a characteristic color of cathode glow and, also, generates ultraviolet light when discharged. The gas filling also includes mercury vapor. The method of the invention comprises operating cells at different levels of intensity, determined by input signals so that, at a low level of intensity of cell ionization and current flow, the phosphor is energized and produces its characteristic color of glow which is the dominant light output from the cell. In addition, by operating the panel at a higher level of ionization intensity and current flow, the characteristic color of cathode glow of the gas dominates the phosphor glow and provides the primary glow visible to a viewer. Similarly, if input data signals have widely varying intensities, then the current flow through the display cells varies similarly and the color of light output from the cells varies over a wide range, depending on the relative contribution of each of the components in the cell, the phosphor, the gas, and the mercury.
Abstract:
A plasma display panel having a short decay time, high luminance, and high efficiency is provided. The plasma display panel includes a green phosphor layer that emits visible light when excited with vacuum ultraviolet rays. The green phosphor layer contains a green phosphor represented by the general formula aBaO.(2-a)EuO.bMgO.cSiO2.fCaCl2 (where 1.800≦a≦1.980, 0.950≦b≦1.050, 1.900≦c≦2.100, and 0.001≦f≦0.020).
Abstract:
A color plasma display panel including a pixel matrix array (R, G, B) in which discharge cells of the red (R), green (G) and blue (B) are grouped to constitute a pixel, wherein the pixel includes a blue discharge cell (B) having a height smaller than the entire height of the pixel and width equal to entire width of the pixel (R, G, B), and red and green discharge cells laterally aligned with each other, each of the red and green discharge cells having a height corresponding to a difference between the entire height of the pixel and the height of the blue discharge cell (B) and a width less than 1/2 the entire width of the pixel. The pixel further includes an assistant cell (M) disposed between the red and green discharge cells and priming holes (H) respectively provided at partition walls each disposed between each of the red (R) and green (G) discharge cells and the assistant cell (M). In this color plasma display panel structure, it is possible to easily adjust a luminance difference among three kinds of discharge cells, thereby achieving improvements in white balance and luminance.
Abstract:
A method for driving a plasma display panel comprising a plurality of first electrodes disposed in parallel with each other, a plurality of second electrodes disposed in parallel with each other and perpendicular to the first electrodes, the second electrodes having a plurality of blocks, and a driving means to apply pulses to the second electrodes, wherein the different electrodes belonging to the different blocks are successively scanned in the predetermined order. Alternatively, the different electrodes may be scanned by repeating applications of pulse to a second electrode belonging to a certain block and to a second electrode belonging to either of the adjacent blocks.
Abstract:
A monochromatic and polychromatic display system (10) which is operative by the generation of ultraviolet energy impinging on fluorescent material compositions (54) in order to create electromagnetic wave generation within the visible bandwidth of the electromagnetic spectrum through fluorescent excitation of fluorescent material (54). The operative ultraviolet energy produced results from the ionization of metallic atoms from a metallic coating (28) applied to cathode opening sidewalls (26) of a cathode mechanism (12). The display system (10) includes a matrix of cathode openings (22) formed in a cathode plate member (14). The cathode openings (22) define the cathode opening sidewalls (26) which have a metallic coating (28) applied thereto. The sidewall metallic coatings (28) and additionally, the metallic coating annular portion (30) of each hollow cathode cavity are coupled to a next succeeding cathode element in a linear column direction (32). A matrix of anode elements (46) are mounted below the cathode plate member (14) and are axially aligned with the cathode openings (22). The display system (10) is formed into a monolithic structure which includes an internal chamber (66) within which an inert or combination of inert gases is introduced. Fluorescent material compositions (54) are positionally located in aligned relation above cathode openings (22). Electrical energization of the cathode elements and the anode elements (46) results in ionization of metal atoms emitted from the metallic coating (28). The ionization process provides for ultraviolet radiation which is directed to the fluorescent material composition (54).
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.