Abstract:
A display device comprising a panel structure including a plurality of gas-filled display cells and including within the body of the panel, gas communication channels extending between adjacent cells to facilitate the flow of masses of excited particles and the transfer of glow from one cell to another. The display panel also includes a plurality of particle-supply gas cells which are adapted to fire without fail and provide excited particles for use in firing said display cells.
Abstract:
The apparatus of the invention is adapted for operating multiple position display devices having a plurality of groups of display cathode segments or elements, with corresponding elements electrically interconnected, an anode electrode associated with each group of display segments, and an auxiliary electrode common to all of the groups of electrodes for preventing spurious glow between them. The simplified circuit biases the OFF cathodes from a voltage divider common to them and the auxiliary electrode, thus eliminating separate biasing for the OFF cathodes. The signals applied to the display tube or panel are also blanked during an interval in advance of signal transitions in the device, for inhibiting spurious glow under varying conditions of operation. Voltage divider apparatus also is provided for biasing the OFF anodes in a nonconductive state at a potential proportional to the tube bias potentials.
Abstract:
The display panel comprises first and second layers of communicating gas-filled display cells. The first layer includes a first plate having grooves, with first electrodes seated in the grooves, and second electrodes supported by the plate so that the first and second electrodes and the gas in the slots between them form a first layer of cells. The second layer includes a second plate having either grooves or apertures seated on the second electrodes, with third electrodes in the grooves of the second plate or on the top surface of the plate where an apertured plate is used, so that the second and third electrodes and the gasfilled space between them comprise the second layer of cells.
Abstract:
A display device comprising a panel structure including a plurality of gas-filled cells and including, within the body of the panel, gas communication channels extending between selected cells to provide a selective flow of excited gaseous particles from certain cells to others to prime the receiving cells and thereby control the transfer of glow between the cells.
Abstract:
Apparatus addressing multi-position display devices directly from semiconductor integrated circuits and driving the display electrodes without exceeding the limitation on voltage excursions for the outputs of such circuits. The apparatus develops and applies to threshold-responsive display devices, including gas discharge display tubes or display panels, only the amount of voltage that is needed to operate them. Potential for operating the device is accumulated in steps until the device fires, it being applied to the display electrodes of the device in response to open-circuit input signals. The potential is regulated to maintain ionization delay in the device as a certain fraction of the display period and the required selection voltages for the electrodes of the device are minimized. The potential for driving the cathodes is developed across a capacitance common to all of them, and a regulator circuit coupled to it and to the cathode drivers automatically increases the bias until the device fires. The potential that proves to be necessary to operate a device is stored for continued operation of it. The driver for a cathode element that is frequently operated alone is coupled to the regulator circuit by a high impedance connection for increasing the energizing potential sufficiently to ensure ionization. The anodes are driven from semiconductor logic circuit often without intermediate circuit elements.
Abstract:
A display panel includes a plurality of rows and columns of display cells, each having an anode and a cathode and including a novel drive arrangement for selecting and energizing one cell at a time.
Abstract:
The system operates with a display panel comprising a large number of small dot-like gas-filled cells, each of which has a drive circuit which can be energized to pass current therethrough to cause the cell to glow. The system includes means for applying both a video signal and a control signal to the driver circuit to thereby control the amplitude and time duration of the current flowing through a cell. This controls the cell brightness. Another system includes (1) a driver circuit to which a varying voltage is applied to cause a varying current to pass therethrough to a cell and (2) a voltage comparator which combines the video signal and a control signal to control the time duration of said varying voltage applied to the driver and thus the time duration of said varying current. This also controls the cell brightness.