《LCD成像示意》PPT课件

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1、LCD成像示意圖TCONDATAScalingRGBDVI(TMDS)ADCOSDMCUGATEShiftRegisterMulti-selectVideoFramebufferPanelCellPCROMGammaLCD成像示意圖1024768OOOOOOOOdddddddd01234567EEEEEEEEEdddddddd01234567DCtoACLCDPanel控制訊號ShiftregisterOOOOOOOOdddddddd01234567EEEEEEEEEdddddddd01234567gm5020R類比數位選擇器選擇控制數位R奇;偶數選擇ADCOOOOOOOO

2、dddddddd01234567EEEEEEEEEdddddddd01234567gm5020RBGLCDPanel1024x768Data1Data2Data3Data4Data5Data6Data7Data8GateShiftRegister1GateShiftRegister2GateShiftRegister3TCONData1384(pixel)=128(line)x3(RGB)128x8=102448=8(bit)x3(RGB)x2(evenodd)SRAM=384x8(bit)8Bitslatch8BitsDAC8Bitslatch8BitsDAC8Bitsl

3、atch8BitsDAC8Bits8Bits8Bits8BitslatchDAC8BitslatchDAC8BitslatchDAC8BitslatchDAC8BitslatchDAC8BitslatchDAC8BitslatchDAC8BitslatchDAC8BitslatchDACMulti-selectShiftRegisterT0……1000000000T1……0100000000T2……0010000000T3……0001000000T4……0000100000T5……0000010000T6……0000001000OddEvenTCONDataregister

4、PanelcellInputVideoCaptionwindowOutputVideoH-syncandV-sync

5、Resolution

6、CaptionWindow

7、Buffer(line/frame)

8、OutputclockScaling640x480---->1024x7681024/640=1.6768/480=1.61.6:1=16:10=8:50/5=0.01/5=0.22/5=0.43/5=0.64/5=0.85/5=1.00/8=0.0001/8=0.1252/8=0.2503/8=0.3754/8=0.5005/8=0.6256/8=0.7507/8=0.

9、8758/8=1.000Scaling0/5=0.01/5=0.22/5=0.43/5=0.64/5=0.85/5=1.00/8=0.0001/8=0.1252/8=0.2503/8=0.3754/8=0.5005/8=0.6256/8=0.7507/8=0.8758/8=1.000LineBufferLinebufferADCBufferOutputFramebufferTCONDATAScalingRGBDVI(TMDS)ADCOSDMCUGATEShiftRegisterMulti-selectVideoFramebufferLVDSorTTLNormalorRSDS

10、TMDSROMGammaRGBDVI(TMDS)ADCRGBDACDVI(TMDS)1024768ADCPCSignalcableADCPhase0NN+?0VV+0.700.7Data=>Data2=Data*Cable_loss_gain=>Data3=(Data2-offset1)*ADC_Gain=>Data4=Data3-offset20nn+0.7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7並列=>串列Line=>Line/nFrequency=>Frequency*nD0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D

11、2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7串列=>並列Line=>Line*nFrequency=>Frequency/nTMDSD0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7TMDSD0D1D2D3D4D5D6D7D0D1D2D3D