Method for driving active matrix LCD using only three voltage le

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

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345 92, G09G 336

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active

059866314

ABSTRACT:
A driving method of an active matrix LCD is provided. According to this method, a scan signal has three voltage levels, i.e., an ON voltage Vg, an OFF voltage Voff and a compensation voltage Ve having the opposite polarity with respect to the OFF voltage Voff. In contrast with the conventional capacitively coupled driving method in which the scan signal consists of four voltages, the driving method of this invention can reduce a cost and power consumption for a driver IC without degradation due to flickers or other causes. The method for adjusting the brightness of the LCD accompanying this driving method as well as the method for optimizing design parameters of the compensation voltage Ve and a thin film transistor of the LCD are also described.

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