Abstract:
These segmented-electrode gas panel displays include a plurality of groups of cathode electrodes arranged in a display matrix, each group having an anode electrode operably associated therewith, and an auxiliary voltage reference device formed within the display panel itself. The reference device comprises at least a pair of electrodes that are spaced apart and in contact with the same gas in the panel that is in contact with the display electrodes thereof. The regulator cathode is formed of multiple or segmented cathode elements or comprises several exposed portions of an electrode element that is masked by an apertured insulating layer. The display apparatus further includes circuit means coupled to the integral voltage reference device and to the display electrodes to regulate the bias on one set of them at a level which allows direct operation of the display panel by semiconductor integrated circuits which have limited output voltage signals available for energizing the display electrodes. Current in the regulator segments, if connected in common, will be automatically apportioned among them as a function of their glow-sustaining characteristics which provides improved regulation in the apparatus.
Abstract:
A circuit for scanning a display panel including means for automatically progressing from cell to cell along a row, sensing the arrival at the end of a row and automatically switching to the next row and causing the scanning operation to proceed in the opposite direction to the end of this next row, and thus automatically scanning from row to row and finally sensing the last cell in the panel and resetting the panel and circuit for the start of another complete scanning cycle.
Abstract:
The display panel includes a plurality of gas-filled cells and electrodes therefor, with some of the cells being formed by apertures in an insulating plate. The panel includes a selected phosphor material which is integral with said insulating plate and is exposed in the apertures therein.
Abstract:
An electrooptical display system includes a display panel having a plurality of gas-filled glow cells and electrodes for scanning or firing the cells in accordance with a predetermined pattern. The system includes a transparency which carries a message to be transmitted and a novel pickup for reading light which passes through the transparency and generating electrical signals therefrom. The signals can be used at a remote location to reconstitute the message or for any other purpose.
Abstract:
A display panel includes a plurality of layers of gas-filled glow cells and a plurality of arrays of electrodes. One layer of cells is scanned once for each picture to be stored and displayed, and another layer is used to display the glow or picture with memory.
Abstract:
The disclosed system is adapted for operating multiple position display devices having a plurality of groups of display cathode segments or elements positioned side-by-side, with corresponding elements being electrically interconnected and each group having an associated anode, and an auxiliary electrode common to all of the groups of electrodes for preventing spurious glow about them. The drivers for the anodes are coupled in parallel through suitable impedances to a common impedance from which is taken proportional potential for biasing the auxiliary electrode responsive to the pulsed operation of the anodes. The cathode drivers are also optionally coupled to the common impedance or the auxiliary electrode itself for negatively influencing the auxiliary electrode potential as a function of the number of cathode segments being energized, to aid in preventing spurious glow during operation of the device at high current levels.
Abstract:
A display panel including a lower layer and an upper layer of gas-filled cells with cathodes in common between the layers and with separate anodes associated with each layer of cells, tiny apertures in the cathodes interconnecting upper and lower cells, having improved cathodes wherein the surfaces in the apertures of the cathodes are treated to increase their work function so that these surfaces do not support cathode glow in the operating conditions of the panel, thus preventing spurious transfer of cathode glow from the lower scanning to the upper visible layer of cells.
Abstract:
The machine controller is adapted for use with a copying machine which is adapted to perform a plurality of functions including printing copies. The controller includes various machine synchronizing circuits and, in addition, a first counter for counting copies made, a second counter for registering copies to be made, and third counter, all of the counters being interrelated to control the making of copies, detecting when the desired number of copies have been made, and turning off the machine at the end of a copying cycle.