GIA(Gate Driver in Array)技術(shù), 使用GIA電路取代Gate IC, 將Gate IC和Source IC進行整合。只需要Source driver IC即可驅(qū)動Panel。
TFT panel驅(qū)動架構(gòu)介紹
TFT驅(qū)動系統(tǒng)三部分:Timing controller,Source driver,Gate driver;
Tcon:Timing controller 時序控制,接受顯示主控芯片的LVDS數(shù)據(jù),控制gate driver IC 和 source driver IC實際驅(qū)動LCD panel;
Gamma reference voltages:Gamma參考電壓 ,gamma產(chǎn)生的V0~V10作為基準(zhǔn)電壓,Source Driver IC內(nèi)部繼續(xù)分壓產(chǎn)生64階灰度reference voltages;
Vcom reference voltage:Vcom 參考電壓
Column Drivers:列驅(qū)動器(Source Driver 驅(qū)動器)
Row Drivers:行驅(qū)動器(Gate Driver 驅(qū)動器)
DC/DC converter:直流轉(zhuǎn)換電源,提供 Gate Driver IC, Gamma,Source driver需要的正負(fù)高電壓,數(shù)字工作電壓
功能介紹:
Timing controller:
(a)通過控制信號,協(xié)同Source driver,Gate driver按照正確的時序工作,驅(qū)動面板;
(b)數(shù)據(jù)信號的輸入并做相應(yīng)處理后傳輸?shù)絪ource driver;
(c)內(nèi)嵌基本圖像處理算法(FRC,Over Drive,BFI,Color Engine,Gamma Correction)等;
Source driver:
接受Timing controller的控制信號(Pol,TP,STH),將輸入數(shù)據(jù)信號轉(zhuǎn)換成電壓輸出,配合TFT的開關(guān),對面板的像素電極進行充電;
Gate driver:
接受Timing controller的控制信號(OE,STV,CPV),按照正確的時序循環(huán)輸出開關(guān)電壓給TFT 柵極,控制TFT的開關(guān);
Gate IC 介紹
Gate Drive IC用來掃描每一行的 TFT,將其打開來顯示該行的圖像
完全分離型顯示驅(qū)動芯片方案,TCON+Source IC+Gate IC
在完全分離型芯片架構(gòu)中,TCON立于Driver IC設(shè)計在PCB上,Source IC和Gate IC分別綁定在玻璃側(cè)邊和底部。TCON輸出Display Data、Source Control和Gate Control信號,通過PCB、FPC和玻璃基板走線,分別傳輸給Source IC和Gate IC。Source IC和Gate IC分別通過玻璃基板走線向Display Area(顯示區(qū)域)傳輸電壓信號驅(qū)動顯示面板工作。
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