【正文】 R C R C R C R C N RCNeq 22??液晶畫素邊際電場(chǎng)效應(yīng) (一 ) Reverse Tilt 畫素電極 鄰近電極 共通電極 VP VL VA VA VL : Disclination Appeared VA VL : Disclination Disappeared VP LC Threshold Voltage Reverse Tilt 液晶畫素邊際電場(chǎng)效應(yīng) (二 ) TFT 水平驅(qū)動(dòng)電極 垂直驅(qū)動(dòng)電極 Rubbing Direction Disclination Line Reverse Tilt Domain 改善方法 預(yù)傾角 (Pretilt Angle) Black Mask 的 遮蔽面積 驅(qū)動(dòng) IC － Scan Driver Bidirectional Shift Register Level Shift Circuit Output Buffer G1 G2 G3 ………... STVR STVL CPV R/L VDDD VSSD VDDA VSSA STVR STVL G1 G2 Gx Serial In － Serial Out Analog Data Driver Select Data j Data j+1 Multiplexer Pro:Very simple. Fewer external connections. Con:Many analog inputs. Reduced pixel charging time. System Note : Sample clock : (Dot clock) / N, N Phases. Video Phase : N Shift Register Video In Qi Qi+1 Variation on Multiplexer Pro:Video Input. Con:Fast data line charging needed. Reduced pixel charging time. System Note: Shift Clock : (Dot Clock) / 3 for Mono. Video Phase : 3 for Mono. Sample and Hold Serial In － Parallel Out Analog Data Driver (一 ) Shift Register Qi Qi+1 Qi+2 Qi+3 Video In Transfer Double Sample and Hold / Single Phase Sample N Sample N+1 Sample N+2 T T T N N+1 N+2 Out N1 Out N Out N+1 Pro:Video Input. Small load on fast sampleandholds. Full line time to charge pixel. Con:Complex analog circuit. Physical size. System Note : Shift Clock : Dot Clock. Video Phase : Single Phase. Serial In － Parallel Out Analog Data Driver (二 ) Shift Register Qi Qi+1 Video In Transfer Double Sample and Hold / MultiPhase Por : Reduced operation frequency . System Note : Video In : N Video Phase : N Shift Clock : (Dot Clock) / N. Digital Data Driver (一 ) Shift Register DAC DAC DAC DAC DAC Serial Data Bus Digitaltoanalog Converters Por : Digital input. Con : Complex. Requires sufficient precision to correct for LC response variation. Shift Register Count Count Count Count Count Ramp In Sampled Ramp Por : Digital input. Programmable ramp. Con : Complex circuit. High speed digital circuits. Reduced pixel charging time. Digital Data Driver (二 ) Shift Register Decode Decode External Fixed voltages 1ofn Selector Simple DAC Pro : Digital input. Programmable external voltages. Con : Complex circuit. High speed digital circuits. Many pass gates per data line. Digital Data Driver (三 ) D0 S0D1 S8D2 S16D3 S24D4 S32D5 S40 S4 8 S5 6 S6 4SC CT1 T 2 T3 T4OUTV6 4 V5 6 V48 V4 0 V32 V2 4 V1 6 V8 V 0Fi g 3. St u rcture of t h e S C O LT1 T2T3T476541234F ig 4 . W av ef orm o f T MSV0V8F ig 5 . O u tp u t W av ef o r m whe n d ata is 6 nmnVmVV average ji???All Digital Circuit Gamma Correction of LCD X Y 取像元件 取像電路 顯像電路 顯像元件 攝像機(jī)測(cè) 受像機(jī)測(cè) Analog Correction : 2 ~ 3 Segment Approach. Digital Correction : External fixed voltage. Gamma Correction Simple Case X Y 取像元件 取像電路 顯像電路 顯像元件 攝像機(jī)測(cè) 受像機(jī)測(cè) Transmission Voltage The Block Diagram of the TFT LCD Module CCFL Backlight TFTLCD PANEL Timing Controller Scan Driver Data Driver RGB CLK Hsx Vsx TFTLCD Module The TFT LCD Module Type ? Classified into two kinds by data driver – Analog type TFTLCD module ? The analog data drivers ? The analog interface to PC ? Only NEC – Digital type TFTLCD module ? The digital data drivers ? The ADC/ LVDS/PanelLink interface to PC ? Mainstream The Analog Interface Graphics Controller TFTLCD PANEL Timing Controller Scan Driver Analog Data Driver Hs Vs Analog RGB Analog RGB CLK Hsx Vsx PreAmp Level Shifter Controller PLL PC Analog Module TFTLCD Module OSD CCFL Backlight The ADC Interface Graphics Controller TFTLCD PANEL Timing Controller Scan Driver Digital Data Driver Hs Vs Analog RGB Digital RGB CLK Hsx Vsx ADC Buffer Controller PLL PC ADC Module TFTLCD Module OSD CCFL Backlight The LVDS/PanelLink Interface Graphics Controller LVDS/ PanelLink Tx LVDS/ PanelLink Rx TFTLCD PANEL Timing Controller Scan Driver CABLE Clock Hs Vs Digital RGB Digital RGB Clock Hs Vs PC TFTLCD Module Digital Data Driver CCFL Backlight Analog/ADC/LVDS/PanelLink ? Analog Interface – True Color – Sampling Error – Low Edge Sharpness – Noise in the Analog Signal Transmission Analog/ADC/LVDS/PanelLink ? ADC Interface – Mainstream in the Desktop LCD Monitor Interface – Sampling Error – Low Edge Sharpness – Noise in the Analog Signal Trans