Chunghwa Picture Tubes, Ltd.

Shih-Chieh Yen

Hsiang-Tan Lin

Kuo-Lung Tsao

A driving circuit and a gray insertion method of a liquid crystal display (LCD) are provided. The gray insertion method includes analyzing whether a current frame belongs to a dynamic frame or a static frame. When the current frame belongs to a dynamic frame, charging time of a gray insertion image is extended. When the current frame belongs to a static frame, the charging time of a gray insertion image is shortened. As a result, motion blur on the LCD can be reduced and image quality can be increased.

Driving circuit and gray insertion method of liquid crystal display

A time controller with power-saving function is utilized for selecting to drive a display with progressive or interlace scan method based on if two continuous frames are dynamic. The time controller comprises an interlace scan control module, a progressive scan control module, a motion detecting circuit, a scan selecting circuit, and a data selecting circuit. The interlace scan and the progressive scan control modules are utilized for generating control signals of interlace scan and progressive scan according to a video signal, respectively. The motion detecting circuit select the control signals of interlace scan or progressive scan based on if the two continuous frames are dynamic, so as to drive the display. In this way, consumed power of the display is saved and a saw-tooth effect on the video frame is avoided.

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Chiayi County, Taiwan

Shih-Chieh Yen