TFT-LCD驱动原理简介.ppt

驅動原理簡介系統設計,TFT-LCD,Circuit Plate,Why does LC inversion ?,,+,_,,Frame Inversion  Line Inversion Column Inversion Dot Inversion,Driving Method,Driving method comparison,Driving Method,Dot Inversion,,,,,+,-,-,+,,,,-,+,+,-,,1,2,3,4,B,A,A1,A3,A2,A4,B1,B3,B2,B4,,Feed-through Voltage,Cs,Vgh,Vgl,電荷守恒定理,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,LVDS,&,Timing,Controller,,Gamma,Generator,,DC-DC,Converter,,V,COM,Driver,,User Connector,,,,,,,,,,,,,,,,,,,Source Driver,,TFT-LCD Panel,,Gate Driver,,,G1,,,G2,,,G3,,,G1050,,,,,,,,,D1,,,D2,,,D3,,,D4200,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,Source &,Controller PCB,Control Signal,,,,,,,,,,,,,,VCOM,Gamma,DVDD,AVDD,Von,/,Voff,Video Signal,,,,,FPC &,Connector,EEPROM,,,I2C,SXGA+ Block Diagram,,1)Source driver a. P01(SD- LH165415),Feature:1)6 bit digital input(262,144 colors) R(0,0,0,0,0,0,)-(1,1,1,1,1,1) G(0,0,0,0,0,0,)-(1,1,1,1,1,1) B(0,0,0,0,0,0,)-(1,1,1,1,1,1)2)Single port input3)11 reference voltages4)Mode select: 309/300 output5)Shift clock frequency: 55MHz(Max.)6)Line inversion,b. P03(LH168A05),Feature:1)6 bit digital input(262,144 colors)2)Dual port input3)10 reference voltages4)384 output5)Shift clock frequency: 55MHz(Max.)6)Line inversion,2)Gate drivera. P01(LH169402),Feature:1)256 output2)Output signal masking function,b. P03(LH169203),Feature:1)Output:3002)Internal counting system 3)Mode selection (3 modes),18,P03 Driving structure (Source driver),,,,,,Tcon,,,,,,,,,GSP1,,,GSP2,,GCK,GD1,GD2,GD3,GD4,CE1:LCE2:H,CE1:HCE2:H,CE1:HCE2:H,CE1:LCE2:H,,,,,Tcon,,,,,GCK,,,,,GSP,GD1,GD2,GD3,P03 Driving structure (Gate driver),P01 Driving structure (Gate driver),Vcom DC driving-Frame, Row, Column and Dot inversion available.,Vcom AC driving -Frame & Row inversion available.,VESA Video Timing Spec.,,V-Sync,,,,,,,,,,……,……,……,……,H-Sync,Data,,,,,Time Scale放大,H-Sync,,,,,,,,,,,……,Dot Clock,Data,,,,,,,,,,,……,……,……,…,,,V-Sync & H-Sync,,,,,Vtotal=16.67ms,,TxIN12～17,TxIN 0～ 5,TxIN 6～11,,R0～R5,B0～B5,Hsync,Vsync,ENAB,G0～G5,,,,,,,,,,,,,RXIN0+(6),RXIN0-(5),TxIN18,TxIN19,TxIN20,,,Controller,,,,,,,,,TTL PARALLEL-TO-LVDS,PLL,DS90C*363,,,,LVDS-TO-PARALLEL TTL,PLL,DS90CF364,RXIN1+(9),RXIN1-(8))),RXIN2+(12)10),RXIN2-(11),RXCLKIN+(15)10),RXCLKIN-(14),,,,,,,RxOUT12～17,RxOUT18,RxOUT19,RxOUT20,RxOUT0～5,RxOUT6～11,,R0～R5,B0～B5,Hsync,Vsync,ENAB,G0～G5,Internal circuits,,RxCLK OUT,CK,CLK,TxCLK IN,,,（Computer side）,(TFT-LCD side),Interface block diagram Using receiver：DS90CF364(National semiconductor） Corresponding Transmitter：DS90C363,DS90C383(National semiconductor）,,Gamma correction Voltage,CRT,Gamma correction Voltage,LCD,Gamma correction Voltage,,(DAC),,,,,,,,Driver IC,Digital Data,Analog Signal,s1,s2,sn,VG1,Dn,Gamma Voltage,VGn,D1,Gamma correction Voltage,0,32,64,128,192,240,254,255,DC-DC Converter Circuit,ASIC Circuit,。