Scan inversion symmetric drive
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United States of America Patent
Stats
-
Dec 4, 1990
Grant Date -
N/A
app pub date -
Jun 16, 1987
filing date -
Jun 16, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thin-film electroluminescent display panel system has a plurality of vertical column electrodes driven by column driver circuits and a plurality of horizontal row electrodes driven by row driver circuits. The system includes a row driver control circuit that enables the row drivers in a first sequence during a first display frame so that write voltage pulses are applied to the row electrodes in order from the top to the bottom of the display panel. The row driver control circuit enables the row drivers in a second sequence during a second display frame so that the write voltages are applied to the row electrodes in the reverse order from the bottom of the display panel to the top of the display panel. The alternating sequences of application of the write voltages to the row electrodes cause the average residual dc voltage across each of the pixel elements of the display panel to be substantially reduced towards zero so that latent image problems caused by the residual dc voltage is substantially reduced or eliminated.
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