| 摘要 |
PURPOSE: An active matrix liquid crystal display and a method of driving the active matrix liquid crystal display are provided to reduce the effects of variations in retained voltages caused by parasitic capacitance and the differences in brightness between the top and bottom of a display screen, and to improve display quality. CONSTITUTION: An active matrix liquid crystal display drives liquid crystal by writing through TFTs(Thin Film Transistors), a source signal from a signal line drive circuit(3) to display electrodes in display cells(P) on a matrix substrate(7) and applying a common signal supplied from a common signal generator(5) to common electrodes on an opposite substrate(8), the common signal changing in polarity in each frame. After scanning is completed for scan lines(G) corresponding to one frame, a controller(6) controls the interval between scan periods and the cycle of change in polarity of the common signal to provide a non-scan period longer than the scan period. The provision of the non-scan period extends the duration in which a specified voltage is retained by the display cell. Herein, the effects of variations in retained voltages caused by parasitic capacitance developing in reflective electrode structures are reduced. Therefore, differences in brightness between the top and bottom of a display screen are reduced in frame inversion drive.
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