【正文】 riation. 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 攝像機測 受像機測 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 攝像機測 受像機測 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 Transmission – EMI Issue for High Resolution Format – Low Image Quality and High Cost Analog/ADC/LVDS/PanelLink ? LVDS Interface – Mainstream in the Notebook PC Interface – High Edge Sharpness – Reducing EMI Number of Cable Line – High Image Quality and Low Cost – Short Transmission Length Low Noise Margin – Compatible Issue ? PanelLink Interface – Application in the Desktop LCD Monitor Interface – High Edge Sharpness – Reducing EMI Number of Cable Line – High Image Quality and Low Cost – Second Supply Source Issue Analog/ADC/LVDS/PanelLink TFT Module 設計考慮 (一 ) ? 顯示的影像訊號時序規(guī)格 (Image Format) ? 圖框重複率 (Frame Rate) ? 水平掃描線掃描時間 ? TFT 的 ION/IOFF 電流 ? 水平掃描脈線的 RC時間常數(shù) ? 灰階誤差 ? 直流漂移 TFT Module 設計考慮 (二 ) ? 選擇適合的驅動方式 (Cs on Gate or COM) ? 選擇適合的極性轉換方式 ? 驅動 IC(Scan Source)的選取 ? TFT LCDs 模組介面技術的選擇 大面積高解析度 TFT LCDs 的開口率影響因素 大尺寸面積 增加水平驅動 電極阻值 增加水平驅動 波形的時間常數(shù) 增加水平掃描線 減少液晶畫素的 有效充放電時間 增加解析度 增加 Cgd/CLC 的比值 增加 ΔVgd 增加 Reverse Tilt Domain 與畫素 面積的比例 增加 Black Matrix 的遮蔽面積 降低畫面品質 增加水平驅動 電極的寬度 增加 TFT 的 尺寸 增加儲存電容 CS 的面積 降低開口率 Plasma Addressing LCDs Cathode 200V Anode 0 200 Negative Clow Positive Column Faraday Dark Cathode Anode 200V Virtual Connection Sampling Capacitor Analog Signal InPlaneSwitch Mode LCDs 偏光版 解偏版 液晶分子 作用電極 玻璃基板 入射光 作用電場方向 出射光之 極化狀態(tài) 未加電場 OFF 狀態(tài) 施加電場 ON 狀態(tài) 出射光 Vertical Alignment Mode LCDs 未加電場 OFF 狀態(tài) 施加電場 ON 狀態(tài) 入射光 偏光板 液晶分子 玻璃基板 出射光之 極化狀態(tài) 解偏板 出射光 Comparison of Liquid Crystal Modes Strongly dependent on viewing angle 低驅動電壓 視角窄小 Off(White) On(Black) Slightly dependent on viewing angle 廣視角 液晶反應速度慢 Off(Black) On(White) 畫面對比低 畫面品質差 Slightly dependent on viewing angle 畫面對比高 廣視角 Off(Black) On(White) 液晶反應速度快 彩色畫面顯像佳 TN IPS VA 謝謝觀看 /歡迎下載 BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAITH