Digital controller for gas discharge tube

Electric lamp and discharge devices: systems – Current and/or voltage regulation – Keyboard operated or pattern controlled regulator

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Details

315224, 315293, 315307, 315DIG7, H05B 4136

Patent

active

050417673

ABSTRACT:
A gas discharge tube is controlled in intensity and in the length along such tube that is illuminated by providing digital control signals to an analog drive circuit connected to the high-voltage energization device for the tube. A pulse-width modulated digital control signal containing illumination length and intensity information is converted to ramp-shaped analog drive pulse that control the voltage at a high-voltage transformer secondary to which the gas discharge tube is connected. A manually actuatable keypad permits the user to enter the information that is then converted to the pulse-width modulated signal.

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