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1、TFT-LCD驅動驅動IC設計設計National Chi Nan University Department of Electrical Engineering志文http:/ 电子发烧友 http:/ 电子技术论坛June, 4, 20042Chih-Wen LuICDL/NCNUOutline?Introduction to Liquid-Crystal Display?LCD Driving System?Data Driver of TFT-LCD?Low-Power Driving Scheme?Examples of TFT-LCD Drivershttp:/ 电子发烧友 htt
2、p:/ 电子技术论坛June, 4, 20043Chih-Wen LuICDL/NCNUIntroduction to Liquid-Crystal Displayhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 20044Chih-Wen LuICDL/NCNUIntroduction to Liquid-Crystal Display (contd)TN-LCD(Twisted Nematic)扭轉向型http:/ 电子发烧友 http:/ 电子技术论坛June, 4, 20045Chih-Wen LuICDL/NCNUIntroduction to Liquid-Cr
3、ystal Display (contd)STN-LCD(Super Twisted Nematic)超扭轉式向型http:/ 电子发烧友 http:/ 电子技术论坛June, 4, 20046Chih-Wen LuICDL/NCNUIntroduction to Liquid-Crystal Display (contd)TFT-LCD偏光板 光片 配向膜配向膜 偏光板http:/ 电子发烧友 http:/ 电子技术论坛June, 4, 20047Chih-Wen LuICDL/NCNUIntroduction to Liquid-Crystal Display (contd)Gamma C
4、orrectionCharacteristic of LCRequired Characteristic http:/ 电子发烧友 http:/ 电子技术论坛June, 4, 20048Chih-Wen LuICDL/NCNUIntroduction to Liquid-Crystal Display (contd)Output of DAC with Gamma Correctionhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 20049Chih-Wen LuICDL/NCNULCD SystemTFTTFT- -LCD Module TypeLCD Module T
5、ypeAnalog type TFT-LCD module?The analog data (source) drivers?The analog interface to PC?Only NEC Digital type TFT-LCD module?The digital data (source) drivers?The ADC/LVDS/Panel Link/GVIF interface to PC?Mainstreamhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200410Chih-Wen LuICDL/NCNULCD System (contd)The A
6、nalog InterfaceThe Analog InterfacePCADC ModuleTFT-LCD ModuleGraphicsControllerAnalogRGBHsVsOSDPreAmpControllerLevelShifterPLL CLK Hsx VsxAnalogRGBTiming ControllerScan DriverAnalog Data DriverTFT-LCDPANELCCFL Backlighthttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200411Chih-Wen LuICDL/NCNULCD System (contd)Th
7、e ADC InterfaceThe ADC InterfaceOSDGraphicsControllerAnalogRGBHsVsADCControllerBufferPLL CLK Hsx VsxDigitalRGBTiming ControllerScan DriverDigital Data DriverTFT-LCDPANELCCFL BacklightPCADC ModuleTFT-LCD ModuleOSDhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200412Chih-Wen LuICDL/NCNULCD System (contd)The Digit
8、al InterfaceThe Digital InterfacePCCABLECLK Hs VsDigitalRGBTiming ControllerScan DriverDigital Data DriverTFT-LCDPANELCCFL BacklightTFT-LCD ModuleLVDS/PanelLinkRXLVDS/PanelLinkTXDigitalRGBCLK Hs VsGraphicsControllerhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200413Chih-Wen LuICDL/NCNUData DriverData DriverGa
9、te Driverhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200414Chih-Wen LuICDL/NCNUTFT LCDs Driving MethodData Driver (contd)123451+2+3+4+5+123451-2-3-4-5-123451+2-3+4-5+123451-2+3-4+5-123451+-+-+2+-+-+3+-+-+4+-+-+5+-+-+123451+-+-+2-+-+-3+-+-+4-+-+-5+-+-+123451-+-+-2-+-+-3-+-+-4-+-+-5-+-+-123451-+-+-2+-+-+3-+-+-
10、4+-+-+5-+-+-Frame InversionRow InversionColumn InversionDot Inversionhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200415Chih-Wen LuICDL/NCNUData Driver (contd)General Data Driver ArchitectureGeneral Data Driver ArchitectureShift RegisterInput RegisterData LatchDACOutput BufferR&PLoadR G BVoltage ReferenceTo L
11、CD Panelop1 op2 op3SET CLKNCShttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200416Chih-Wen LuICDL/NCNUData Driver (contd)Design Considerations for Data Driver ICLow-power ConsumptionLow-power Output Buffer DesignLow Dynamic Power DesignHigh-speed Driving (Output Buffer)Resolution (6-bit, 8-bit)Small Areahttp:/
12、电子发烧友 http:/ 电子技术论坛June, 4, 200417Chih-Wen LuICDL/NCNULow-Power Driving SchemeCharge Conservation Methodhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200418Chih-Wen LuICDL/NCNULow-Power Driving Scheme (contd)Charge Conservation Methodhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200419Chih-Wen LuICDL/NCNULow-Power Drivin
13、g Scheme (contd)Charge-recycling Techniquehttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200420Chih-Wen LuICDL/NCNULow-Power Driving Scheme (contd)Multi-level Multi-phase Charge Recyclinghttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200421Chih-Wen LuICDL/NCNUDesign Example # 2Shift RegisterInput RegisterData LatchDACOutput BufferpolLatch EnableR G BVoltage ReferenceTo LCD PanelInversion Controllerclk set resetR&PA High-Speed Low-Power Rail-to-Rail Data Driverhttp:/ 电子发烧友 http:/ 电子技术论坛June, 4, 200422Chih-Wen LuICDL/NCNUDriving scheme Design Example # 2 (contd)Input digital code 2Input digital
