Gas discharge display circuit

Details Gas discharge display circuit Gas discharge display circuit

G - Physics

09

F

375/50

G09F 13/26 (2006.01) G09G 3/10 (2006.01)

Patent

CA 1147878

RD 11,033 GAS DISCHARGE DISPLAY CIRCUIT ABSTRACT OF THE DISCLOSURE A gas discharge display circuit for driving a plurality of gas discharge tubes in a tome-multiplexed manner is disclosed. Each of the tubes include an anode, a plurality of display cathodes and a control cathode. A tube selection circuit generates a plurality of tube drive pulses which are sequentially applied to the anodes of each of the gas discharge tubes. A display cathode selection circuit, including a plurality of low- breakdown-voltage saturated switches, is coupled in parallel to each display tube and determines which display elements of each display tube are to be lighted in response to the application of the tube drive pulse. After a given display tube has been fired, a current control cathode of the fired display tube to regulate the anode voltage of the fired tube and thereby ensure a predetermined current in each of the display cathodes.

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