Title: Method and apparatus for displaying halftone in a liquid crystal display
Application Number: 200410062811 Application Date: 2004.06.18
Publication Number: 1573903 Publication Date: 2005.02.02
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G09G3/36
Applicant(s) Name: Sharp KK Address:
Inventor(s) Name:
Attorney & Agent: bao yudun
Abstract:
     An liquid crystal display (LCD) device uses a method for displaying halftone without causing luminance differences among pixels when an FRC technique is used, and without causing stripe-shaped luminance variations when a flicker component is eliminated spatially. The LCD device includes a data splitter, a pixel location detecting circuit, a frame number determining circuit, an applied timing memory circuit, an applied voltage determining circuit, a summation process circuit, and a timing adjusting circuit. The LCD device determines driving voltages such that for each of a high voltage or a low voltage during these 2N frames, the number of applying positive voltages is the same as the number of applying negative voltages where a unit period is 2N frames for multi-gray-level display of (1 N) levels. The LCD device can improve image quality since the average luminance of each pixel is made uniform.
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