Patent ID: 6496176
Filing Date: 2002-12-17
Classification: G09G

Abstract:
A method of driving a liquid crystal apparatus including:a liquid crystal panel constructed by sandwiching a liquid crystal between a pair of substrates respectively having a plurality of scanning electrodes and signal electrodes; a display capture device for capturing an image displayed on said liquid crystal panel; a capture memory for storing captured image data; a reference memory for storing reference image data; a display data difference circuit which compares the data stored in said capture memory with the data stored in said reference memory; a voltage value adjusting circuit for adjusting voltage values for application to said scanning electrodes and said signal electrodes; and an optimum voltage setting means, and wherein: said optimum voltage setting means applies optimum drive voltage values to said scanning electrodes and said signal electrodes, respectively, based on data obtained from said display data difference circuit; the method comprising: varying, in said liquid crystal apparatus, a signal voltage to be applied to said signal electrodes and a scanning voltage to be applied to said scanning electrodes respectively, for each combination of said signal voltage and said scanning voltage, capturing the display produced on said liquid crystal panel by said display capture device, storing said captured image data in said capture memory, comparing said captured image data with said reference image data, plotting any combination of said signal voltage and said scanning voltage where said two data coincide as a coordinate point with said signal voltage along X axis and said scanning voltage along Y axis, and setting a signal voltage value and scanning voltage value corresponding to the coordinates of the centroid of the region described by said plotted points as the optimum drive voltage values.