-LCD-Driver-IC工作介绍-简-2

1LCDDriverIC工作介绍H.CWu2004.4.22GRBRGB驱动回路基本架构Source(Data)DriverGate(Scan)DriverγVoltageGeneratorDC-DCConverterCommonVoltageGeneratorH,V,CKRGBDataVccVcomVsGateLineDisplayVgSourceLineGrayscalevoltageCSTimingControllerRGBData,CKHCKVVgh/Vgl3Chipsurface123OG1OG2OG2128129OG128OG129DUMMYDUMMY254255256OG254OG255OG256259257258260261262263264265266267268269270271272273274275276277Dummy24PINDummy24PINDummy24PINDummy24PINVDDVDDVEEVEEVSSVCCVCCVSSVLSVLSGNDSVIOR/LCKVOE1OE2OE3SVOITEST2TEST1GNDNote:ThisTCPhas96dummypinswhicharenotelectricallyconnected.GateDriverIC外部脚位图4GateDriveIC功能•接收ASIC(注1)输出的控制信号，协调VGH/VGL的输出。•GateDriverIC工作流程(注1)Application-SpecificIntegratedCircuitBi-directionalShiftregisterLevelshifterOutputcircuiter5Bi-directionalshiftregisterLevelshifterOG1OG2OG3…OG254OG255OG256Outputcircuit内部功能区块图ControlLogic6Bi-directionalshiftregisterLevelshifterOutputcircuitGateDriverIC工作原理CKVVGHVGLSVIOSVIO123254255256触发移位触发下颗一IC7LevelShiftVDD=+26VVEE=-6V3.3V0VLevelShifter提高Data的电压准位，来推动D/Aconverter的MOS。8FunctionalOperationsExampleofinput/outputtimingCKVSVIO(Input)OE1OE2OE3OG1OG2OG3OG4OG5OG6OG256SVOI(Output)1234567255256257258OG256OG255OG254OG253OG252OG251OG1R/L=“H”R/L=“L”9SourceDriverChipsurface321ZO1YO1XO1384383382ZO128YO128XO128Dummy5PINDummy5PINDummy5PINDummy5PIN403405404402401400399398397396395394393392391390389388387386385GNDGNDVLSREVV10V8VCCCKV6SPIOV4V2V0LBRZI0ZI1ZI2ZI3ZI5LSZI4433435434432431430429428427426425424423422421420410409408407406SPOIGNDYI0VLSYI1YI2V7V9YI3V5YI4YI5XI0XI1XI2XI3XI4XI5V1V3POLNote:1.ThisTCPhas20dummypinswhicharenotelectricallyconnected.外部脚位图SourceDriveIC功能•接收ASIC(注1)输出的数字信号、控制信号。•接收PCB输出的Gamma电压(阶调电压)。•将数字信号运算后选择Gamma电压。•协调Gamma电压输出。(注1)Application-SpecificIntegratedCircuit11SourceDriveIC功能•SourceDriverIC工作流程Bi-directionalShiftregisterSampleregisterHoldregisterOutputBufferDACLevelshifterDataLatch12R0~R5G0~G5B0~B5ReferenceVoltageDatalatchγVoltageGeneratingcircuitBi-directionalShiftregisterSamplingmemoryHoldmemoryDAconverterOutputcircuitX01Y01Z01…X128Y128Z128数位回路模拟回路Levelshifter内部功能区块图LatchSignal13Bi-directionalShiftregisterSamplingmemoryHoldmemoryCKSPIOLevelshifterSourceDriverIC工作原理LS触发12127移位SPOI128VLSR0~R5G0~G5B0~B514γVoltageV0~V63DAconverterOutputcircuitLevelshifterSourceDriverIC工作原理R01G01B01R02G02B02R128G128B128R127G127B12715LevelShiftVLS=+10VGND=0V3.3V0V16Gammacorrectionvalue(分壓原理)V0V1V2V3.........V60V61V62V637equalparts8equalparts8equalparts8equalparts8equalparts8equalparts8equalparts7equalpartsV1V2V3V4V5V6V7V8V9V10R0R1R2R3R4R5R6R7R8R9Externalreferencevoltage17DigitalAnalogConverterOutputBufferDataFromHoldMemoryV0D1D2D3D4D5V1V2V3V63V62V61D0111111D0D1D2D3D4D5000000V4V5V6V60100100V7V8V9V10V11V12V13V14V15V59V58V57V56