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The HX8817A application note includes four parts of circuits, HX8817A timing controller
circuit, PWM circuit, microprocessor circuit and video decoder circuit. The timing controller
provides horizontal and vertical control timing to TFT-LCD source and gate drivers with 8
different zoom in/zoom out display modes on different display resolutions. With the built-in
color space conversion circuit, DAC, and operational amplifiers, this controller performs
gamma correction and polarity inverted function to convert digital data into line inversion,
analog amplified RGB signals for TFT-LCD panel. HX8817A provides 2 kinds of pulse
width signal to generate VGH and VGL through PWM circuit. Microprocessor mainly
initializes the register of HX8817A and video decoder. Video decoder circuit processes
composite video signal and generates digital YUV signal to HX8817A. |
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发表于 2006-11-17 10:25:30
