TFTLCD驱动系统简介课件.ppt

TCON System - WTC 原本的相關色溫曲線 藍色 已被修整過而變成下方的曲線 橘色 ， 色溫已不再隨著灰階變動而盡量維持在10000K左右的色溫。 TCON System FRC TCON System - FRC FRC Frame Rate Control 增加灰階，例 : 以6 bits 64階 來表現8 bits 256階 的灰階 使用空間與時間方式 TFT Panel FRC Function RGB 6/6/6 Image Source RGB 8/8/8 RGB 9/9/9 6 bits Panel TCON System - FRC FRC Method - 時間差 ?N level grays ?N+4 level grays TCON System - FRC FRC Method - 時間差 TCON System - FRC FRC Method - 二維空間差 TCON System - FRC FRC Method - 二維空間差 TCON System - FRC 0111 1011 1101 1110 補點策略 N Frame Start point N+1 Frame Start point N+2 Frame Start point N+3 Frame Start point FRC Method – 時間差 + 二維空間差 TCON System EEProm / I2C Bus TCON System – EEprom / I2C Bus 通常TCON IC將其Function-Control暫存器的值及WTC的LUT值儲存於此，與TCON的連接靠的就是I2C Bus 。 TCON System – EEprom / I2C Bus Data transfer of I2C Bus TCON System – EEprom / I2C Bus Connection of the I2C Bus TCON System – EEprom / I2C Bus A0,A1,A2 of the 2402/240X EEprom TCON System Power Design TCON System – Power Design Gate Driver Board Power from Input DC-DC Source Driver Board TCON OP VGH VGL Vdata Vcom Gamma VDD Power Structure TCON System – Power Design Voltage Regulator TCON System – Power Design Q1 turn on Q1 turn ff 穩態時 Boost circuit TCON System – Power Design Duty D 如何產生 誤差放大器 Vref Duty TCON System – Power Design Charge Pump circuit VAA Under 0 2VAA VAA 2VAA 3VAA 2VAA 3VAA TCON System – Power Design R1 R2 Q1 Q2 ZD 22V 25V R3 C1 22.7V VQ2sat + - ILoad VZD+0.7 VZD + - VZD 22.7-VQ2sat 電壓調整 TCON System – Power Design Inverse Charge Pump circuit VAA Under 0 0 -VAA -VAA TCON System TCON IC LVDS , Timing Controller , WTC , FRC EEPROM Power TCON System TFT-LCD Driving System Power Gamma Voltage Gamma Buffer TCON EEprom TFT LCD Panel X Board Y Board Source Driver IC Gate Driver IC RSDS LVDS TCON Board TFT-LCD Driving System 謝 謝 Source Driver System – IC Structure TP1 Source Driver System – IC Structure Source Driver System – IC Structure Data In : RSDS or TTL Data Out : R , G , B arrangement EIO1 / EIO2 : Start pulse In / Out DIR S