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AssigneeSharp Kabushiki Kaisha
InventorsNaoto Inoue, Tomohiko Yamamoto, Keiichi Tanaka, Koji Fujiwara, Hideki Ichioka
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As a method of driving a liquid crystal display device, the average voltage of reference line drive voltages Vcom for AC-driving a liquid crystal is set higher than the average voltage of signal line drive voltage V0. Moreover, when displaying a plurality of gray scales, the respective voltages are set so that the average voltage of the signal line drive voltages is lowered with a decrease in a voltage difference to be applied to the liquid crystal as an absolute value. In a liquid crystal display device of an opposing signal line structure, a high-quality image display is achieved by compensating for the non-symmetry of the transmissivity of the liquid crystal with respect to positive and negative drive voltages to prevent flickering and image persistence.
A method of driving a liquid crystal display device, including a first substrate whereon an active three-terminal element having a gate electrode connected to a scanning line, a drain electrode connected to a pixel electrode and a source electrode connected to a reference line is arranged, a second substrate which faces said first substrate and has a signal line arranged thereon, and a layer of liquid crystal between said pixel electrode and said second substrate, by applying an electric field to said layer of liquid crystal, said method comprising the step of setting an average voltage of reference line drive voltages for AC-driving the liquid crystal higher than an average voltage of signal line drive voltages.
Dependencies are inferred from the claim text.