Scan inversion symmetric drive

Details Scan inversion symmetric drive Scan inversion symmetric drive

1987-06-16

1990-12-04

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340805, 34082581, 3151693, G09G 312

Patent

active

049756915

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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T. Kawada et al., "A Symmetric Drive with Low Voltage Drivers for ac TFEL,"Japan Display, 1986, pp. 272-275.
Preliminary Data Sheet for Siliconix, "SI9550 34 Channel Symmetric Row Driver".
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Preliminary Data Sheet for Supertex "HV53/HV54 32 Channel Serial To Parallel Converter With High Voltage Push-Pull Outputs,".
"SN65563, SN65564, SN75563, SN75564 Electroluminescent Row Drivers,"Advance Information, Texas Instruments, May 1986, pp. 1-8.
L. E. Tannas, Jr., Van Electroluminescent Displays,"Flat-Panel Displays and CRT's, Van Nostrand Reinhold Company Inc., New York, 1985, pp. 237-288 (ISBN: 0-442-28250-8).

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