Apparatus and method for controlling contrast in a dot-matrix li

Details Apparatus and method for controlling contrast in a dot-matrix li Apparatus and method for controlling contrast in a dot-matrix li

1998-06-16

2000-05-02

Mengistu, Amare

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 94, G09G 336

Patent

active

060578203

ABSTRACT:
An apparatus and method for controlling the contrast in a dot-matrix liquid crystal display (LCD) is provided wherein the voltages applied to the electrodes is phase shifted. The phase shifted electrode voltages avoids the problem that rows of the dot-matrix LCD may have long periods when the voltage on the front electrode and the back electrode are different polarities so that the contrast of the dot-matrix LCD across the rows is improved.

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