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US 4,053,812 AGranted
System for driving a display device
AssigneeHitachi, Ltd.
InventorsTetsunori Kaji, Masashi Mizushima
Life of this patent
Estimating the term…
Abstract
A system for driving a display device having photo elements driven by pulsed current from pulsed current sources in which the firing voltage or operating voltage of the photo elements differs from the extinction voltage thereof. The system includes apparatus for setting the voltage applied to the photo elements to a value less than the extinction voltage at a time near the trailing edge of the pulsed current.
Claims22
A system for driving a display device comprising:
- display means including at least one photo element having characteristics such that each of the firing voltage level and the operating voltage level thereof is greater than the extinction voltage level thereof;
- current source means connected to said display means for generating a pulsed current to drive said display means;
- and first setting means connected to said display means for setting the voltage applied to said photo element to a value less than the extinction voltage level thereof at the trailing edge of the pulsed current.
Dependencies are inferred from the claim text.