Method for detecting coordinates of gas discharge panels and app

Details Method for detecting coordinates of gas discharge panels and app Method for detecting coordinates of gas discharge panels and app

1977-12-20

1980-02-12

Smith, Alfred E.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

340707, H05B 3700, H05B 3900, H05B 4100

Patent

active

041885660

ABSTRACT:
A method and an apparatus for determining coordinates in a self-shift type gas discharge panel by means of a light pen, the panel comprising a group of X electrodes connected in common at periodic intervals and a group of Y electrodes crossing said X electrodes. The Y electrodes comprise display Y electrodes and scanning Y electrodes, and detection with the light pen is performed by shifting discharge spots along the scanning Y electrodes by shift pulses applied to the X electrodes.

REFERENCES:
patent: 3875472 (1975-04-01), Schermerhorn

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