201243814 六、發明說明： 【發明所屬之技術領域】 本發明係有關於-種液晶顯示器，尤指一種具光感應輸入 機制之液晶顯示器。 【先前技術】 近年來’具面板輸入機制的電子產品已成為產品流行趨勢，利 用輸入式顯示器作為使用者與電子產品間的溝通介面，可讓使用者 直接透過顯7F絲㈣電子產品的操作，而不需透賴盤或滑鼠。 輸入式顯示ϋ的輸人機制分為域應輸人模式與觸碰輸人模式，其 :觸碰輸人模式顯示器會因經常性的顯示器觸碰動作而容易使顯示 裔又抽，故光錢輸人模式顯示H可具有較長的使財命。一般而 言，光感應輸人模式顯所使㈣域應電晶體之光電流/偏壓特 性曲線係隨人射光亮度而改變，基本上當偏顧定時，人射光亮度 越高則光f流越大’ _就_賴於不·射光競之不同光電 流的運作特性來進行輸人感應，#如在第_人射絲度下所產生之 第-光電流可絲表示第—輸人狀態，而在餘人射光亮度的 第二入射光亮度下職生H錢可絲表示第二輸入狀態， 其中第-光電流係大於預設臨界值，且第三光電流係小於預設臨界 值。然而，長時間的偏壓/照光運作會導致光電流/偏㈣性曲線的偏 移，所以對應於相同驗與相同人射光亮度之光電齡隨長時間的 偏壓/照光運作而越來越大。亦即，經長時間的偏壓/照光運作後，若 201243814 偏壓工作範圍不夠大，則上述第二光電流可能因特性曲線偏移而高 於預設臨界值，如此就會發生輸入狀態誤判，從而造成後級電路的 誤動作。 【發明内容】 依據本發明之實施例，揭露一種具光感應輸入機制之液晶顯示 器’其包含一用來傳輸閘極訊號的閘極線、一用來傳輸資料訊號的 資料線、一用來儲存感應電壓的儲能單元、一晝素單元、一第—光 感應單元、-第二光感應單it、以及-讀出單心電連接於閑極線 與資料線的晝素單元係用來根據閘極訊號與資料訊號以輸出影像气 號。電連接於儲能單元的第一光感應單元係用來根據第一共用電壓 與入射光訊號以產生第-光電流。電連接於第—光感應單元與儲能 早元的第一光感應卓元係用來根據異於第一共用電壓的第二丘用電 壓與入射光訊號以產生第二光電流，其中第二光電流與第一光電流 之差值電流係用以調整感應電壓。電連接於儲能單元與閘極線的讀 出單元係用來根據感應電壓與閘極訊號以輸出讀出訊號。 【實施方式】 下文依本發明具光感應輸入機制之液晶顯示器，特舉實施例配 合所附圖式作詳細說明，但所提供之實施例並非用以限制本發明所 涵蓋的範圍。 第1圖為本發明第-實施例的具光感應輪人機制之液晶顯示器 的示意圖。如第1圖所示，液晶顯示器100包含複數閘極線1〇1、 201243814 複數資料線102、複數讀出線1〇3、複數第一偏壓線1〇4、複數第二 偏壓線1〇5、複數畫素單元19〇、複數光感應輸入装置則、以及吨 號處理單元18G。每-條閘極線皿制來傳輸對應閘極訊號。每 一條資料線102係用來傳輸對應資料訊號。每一畫素單元19〇係用 來根據對制極tfl號進行對應資料訊狀寫人運作，據以輸出對應 影像訊號。每-條第-偏壓線1()4係用來傳輸第—制電壓。 每一條第二偏壓線105係用來傳輸第二共用電壓Vc2。每一條讀出 線103電連接於複數光感應輸入裝置n〇，用來傳輸對應讀出訊號。 電連接於複數s賣出線103的訊號處理單元18〇係用來將每一讀出訊 號轉換為對應輸出電壓Vout。 在第1圖所示之實施例中，每一晝素單元〗9〇均相鄰光感應輸 入裝置110。在另一實施例中，光感應輸入裝置110係可間隔複數 閘極線101而設置，或間隔複數資料線1〇2而設置，亦即並非每一 畫素單元190均與光感應輸入裝置no相鄰。同理，第一偏壓線1〇4 與第'一偏壓線可相對應地間隔複數閘極線ιοί而設置，或讀出 線103可相對應地間隔複數資料線1〇2而設置。下文依光感應輸入 裝置DAn_m以說明各元件之耦合關係與電路運作原理，其餘光感 應輸入裝置110可同理類推。 光感應輸入裝置DAn_m包含第一光感應單元120、第二光感 應單元130、儲能單元140、及讀出單元150。儲能單元140係用來 儲存感應電壓Va。電連接於儲能單元140、閘極線GLn+Ι與第一偏 壓線BXn+1的第一光感應單元120係用來根據閘極訊號SGn+卜第 一共用電壓Vcl與入射光訊號以產生第一光電流Iphl。電連接於第 201243814 二偏祕BY㈣、第-光感應單元⑽與儲能單元i4G的第二光感 應單元130係用來根據異於第一共用電壓Vci的第二共用電壓μ 與入射光減域生第二光電流帕，衫二光糕肿2與第一光 電流Iphl之差值電流lpdif即肋調整感應電壓％。電連接於儲能 單元⑽與_線GLn的讀出料15() _來根據感應電壓^與 閘極訊號SGn以輸出讀出訊號Sro_m。 在第1圖的實施例中，第一光感應單元120包含第-光感應電 晶體121與第-彩色濾、光片129，第二光感應單元13〇包含第二光 感應電晶體131與第二彩色據光片139，儲能單元14〇包含電容 14卜讀出單元150包含電晶體⑸。第一光感應電晶體121具有一 電連接於電容141的第一端、一用來接收閘極訊號犯㈣的閘極 端、及-用來接收第-制電壓Vel的第二端。_於第一光感應 電晶體121的第一彩色濾光片ι29係用來濾出入射光訊號之落於第 -光波長範U的人射光分量，亦g卩第—光感應單元12()之光感測波 段係為第一光波長範圍。電容141係電連接於第一光感應電晶體121 的第一端與第二端之間。電晶體151具有一用來接收感應電壓Va 的第一端、一用來接收閘極訊號SGn的閘極端、及一用來輸出讀出 訊號Sro_m的第二端。 第二光感應電晶體131包含第一端、第二端及閘極端，其中第 一端與閘極端電連接於電容141，第二端用來接收第二共用電壓 Vc2。對應於第二光感應電晶體13ι的第二彩色濾光片139係用來 遽出入射光訊號之落於第二光波長範圍的入射光分量’亦即第二光 感應單元130之光感測波段係為第二光波長範圍。第二光波長範圍 201243814 可部分重疊或不重疊第-光波長範圍。在另—實施例中，第一彩色 滤光片m與第二彩色濾、光片139係可省略，而第一光感應單元12〇 與第二域鮮元HG具有實質上_之域·段。在液晶顯示 器應的運作中，由於第-光感應電晶體121與第二光感應電晶體 131的光電流/偏壓特性曲線偏移可大體上互相補償，因此差值電流 Ipdif對偏壓Vgs的關係曲線幾乎不受長時間偏壓/照光運作所影 響’據以提供高可靠度的光感應輸入機制。 第2圖為第1圖所示之液晶顯示器運作時的差值電流喊對 偏壓Vgs變化之關係示意圖’其中曲、線CBS—H系用以顯示在長時間 偏壓/照光運作前之制L射光高度的紐電流ipdif/偏壓、 關係，曲線CBS一2係用以顯示在長時間偏壓/照光運作前之對應於 南入射光尚度的差值電流Ipdif/偏壓Vgs關係，曲線CAS_1係用以 顯示在長時間偏壓/照光運作後之對應於低入射光高度的差值電流 Ipdif/偏壓Vgs關係，曲線CAS—2係用以顯示在長時間偏壓/照光運 作後之對應於高入射光高度的差值電流Ipdif/偏壓Vgs關係，而臨 界電流Ith係用以判斷對應於差值電流ipdif的輸入狀態。 如第2圖所示’根據關係曲線CBSj與cbs_2可界定出在長 時間偏壓/照光運作前之介於Vgsl與Vgs3間的偏壓工作範圍，而根 據關係曲線CAS_1與CAS_2可界定出在長時間偏壓/照光運作後之 介於Vgs2與Vgs4間的偏壓工作範圍。如上所述，由於第一光感應 電晶體121與第二光感應電晶體13ι的光電流/偏壓特性曲線偏移補 償效應’差值電流Ipdif/偏壓Vgs關係曲線於長時間偏壓/照光運作 後僅發生微量偏移，所以適用於長時間偏壓/照光運作前後的偏壓工 9 201243814 I條圍絲辦叙題工作棚略為縮小 與、Vgsl之差值，亦即仍可提供足夠大的偏麗工作範圍 以避免發生輸入狀態誤判狀況。 。月庄思’第-光感應電晶體121與第二光感應電晶體⑶的光 電流你壓特性曲線偏移補償效應基本上係針對入射光為背景白光 的狀況若使用者利用基於第一光波絲圍的光筆以進行光輸入運 作’則光筆入射光經第—彩色滤光片129縣處理後的光強度幾乎 沒有衰減，故第-光感應單元12〇可感應強度幾乎沒有衰減的光筆 入射光’至於光筆人射統第二彩㈣光丨139獻處理後的光強 度則幾乎衰減為零，故第二光感應電晶體131的運作幾乎不受光筆 入射光影響。亦即，當光筆入射光照射光感應輸入裝置DAn_m時， 可據以產生相當高的差值電流Ipdif’從而提供高光感應靈敏度。由 上述可知，液晶顯示器100的光感應輸入運作係兼具高可靠度及高 靈敏度。 第3圖為第1圖所示之液晶顯示器的工作相關訊號波形示意 圖’其中橫轴為時間轴。在第2圖中，由上往下的訊號分別為閘極 訊號SGn、閘極訊號SGn+卜對應於低入射光亮度之感應電壓Va、 以及對應於高入射光亮度之感應電壓Va。參閱第3圖與第1圖，於 時段Tal内，閘極訊號SGn+Ι之高準位電壓可導通第一光感應電晶 體121，進而將感應電壓Va重置為起始電壓Vst。於時段Ta2内， 閘極訊號SGn+Ι之低準位電壓可使第一光感應電晶體121進入截止 狀態，此時第一光感應電晶體121可感應入射光訊號以產生第一光 電流Iphl，第二光感應電晶體131可感應入射光訊號以產生第二光 201243814 電流Iph2 ’而第一光電流Iphl與第二光電流iph2的差值電流Ipdif 即用來對電容141進行放電運作以調整感應電壓Va。當入射光訊號 只包含背景白光時(對應於低入射光亮度），由於第一光感應電晶體 121與第一光感應電晶體131的光電流/偏壓特性曲線偏移補償效 應，不論是否經過長時間偏壓/照光運作，如第3圖所示，對應於低 入射光焭度之感應電壓Va只根據相當低且幾乎不受運作時間影響 的差值電流Ipdif而微量下降。 當入射光訊號包含背景白光與光筆入射光時，第二光電流Iph2 幾乎不受光筆入射光影響，而第一光電流Iphl則因光筆入射光顯著 增加’故差值電流Ipdif亦隨之顯著增加，此時如第3圖所示，對應 於高入射光亮度之感應電壓Va會根據相當高的差值電流Ipdif而大 幅下降。於時段Ta3内，閘極訊號SGn之高準位電壓可導通電晶體 151以輸出讀出訊號Sro一m，而感應電壓Va則會在讀出過程中被上 拉。 第4圖為本發明第一實施例的具光感應輸入機制之液晶顯示号 的示意圖。如第4圖所示，液晶顯示器200係類似於第j圖所示之 液晶顯示器100，主要差異在於將複數光感應輸入裝置11〇置換為 複數光感應輸入裝置210’並另包含複數第三偏壓線2〇6，其中光感 應輸入裝置DAn_m係被置換為光感應輸入裝置DBn—m。每一條第 二偏壓線206係用來傳輸第二共用電壓Vc3。光感應輸入裝置 DBn_m係類似於光感應輸入裝置DAn一m，主要差異在於將第一光 感應單元120置換為第一光感應單元220。第一光感應單元22〇包 含第一光感應電晶體221與第一彩色濾光片229。第一光感應電晶 11 201243814 體221具有一電連接於電容141的第一端、一用來接收第三共用電 壓Vc3的閘極端、及一用來接收第一共用電壓Vcl的第二端。對應 於第一光感應電晶體221的第一彩色濾光片229係用來濾出入射光 訊號之落於第一光波長範圍的入射光分量。在一實施例中，第二共 用電壓Vc2係大於第一共用電壓Vcl，且第一共用電壓Vcl係大於 第二共用電壓Ve3，據以使第-光感應電晶體221與第二光感應電 晶體131在運作過程中均持續保持在逆偏狀態。 第5圖為第4圖所示之液晶顯示器的工作相關訊號波形示意 圖’其中4頁轴為時間轴。在第5圖中，由上往下的訊號分別為閘極 訊號SGn、閘極訊號SGn^H、對應於低入射光亮度之感應電壓％、 以及對應於高入射光亮度之感應電壓Vae參閱第5圖與第4圖，於 時段Tbi内，閘極訊號SGn之高準位電壓可導通電晶體151以輸出 讀出sfl號Sro一m’而感應電壓Va則會在讀出過程中被重置為起始電 壓Vste於時段Tb2内，閘極訊號SGn之低準位電壓可使電晶體151 進入截止狀態，此時第-光感應電晶體221可感應入射光訊號以產 生第光電流Iphl ’第一光感應電晶體⑶可感應入射光訊號以產 生第二光電流Iph2，而第-光電流!phl與第二光紐啦的差值 電流Ipdif即用來對電容141進行放電運作以調整感應電壓％。當 入射光喊只包含背景白光時’由於第一光感應電晶體221與第二 光感應電晶體131的光電流/偏壓特性曲線偏移補償效應，不論是否 經過長時間偏壓/照光運作，如第5圖所示，對應於低入射光亮度之 感應電壓Va只根據相當低且幾乎不受運作時間影響的差值電流 Ipdif而微量下降。 12 201243814 當入射光訊號包含背景白光與光筆入射光時，第二光電流Iph2 幾乎不受光筆入射光影響，而第一光電流Iphl則因光筆入射光顯著 增加，故差值電流Ipdif亦隨之顯著增加，此時如第5圖所示，對應 於高入射光亮度之感應電壓Va會根據相當高的差值電流Ipdif而大 幅下降。於時段Tb3内’閘極訊號SGn之高準位電壓可再導通電晶 體151以輸出讀出訊號Sro_m’而感應電壓Va則會在讀出過程中又 被重置為起始電壓Vst。請注意，光感應輸入裝置〇丑11_111的運作並 不受閘極訊號SGn+Ι所控制，而起始電壓Vst的重置運作係在讀出 過程完成’故不需要額外的重置專屬時段以重置起始電壓Vst。基 本上，液晶顯示器200的光感應輸入機制大致類似於第丨圖所示之 液晶顯示器100，故其光感應輸入運作仍兼具高可靠度及高靈敏度。 第6圖為本發明第三實施例的具光感應輸入機制之液晶顯示器 的示意圖。如第6圖所示，液晶顯示器300係類似於第！圖所示之 液晶顯示器100，主要差異在於將複數光感應輸入裝置11〇置換為 複數光感應輸入裝置310,其中光感應輸入裝置DAn_m係被置換為 光感應輸入裝置DCn_m。光感應輸入裝置DCn_m亦類似於光感應 輸入裝置DAn一m，主要差異在於將第二光感應單元13〇置換為第二 光感應單元330。第二光感應單元330包含第二光感應電晶體331、 第三光感應電晶體333與第二彩色濾光片339。第二光感應電晶體 331具有一電連接於電容141的第一端、一用來接收閘極訊號3(}11+1 的閘極端、及一電連接於第三光感應電晶體333的第二端。第三光 感應電晶體333具有一電連接於第二光感應電晶體331之第二端的 第一端、一電連接於第二光感應電晶體331之第一端的閘極端、及 13 201243814 一用來接收第二共用電壓Vc2的第二端。對應於第二光感應電晶體 331與第二光感應電晶體333的第二彩色滤'光片339係用來濾、出入 射光訊號之落於第二光波長範圍的入射光分量。當入射光訊號只包 含背景白光時，若差值電流Ipdif因光電流/偏壓特性曲線偏移而上 昇’則第三光感應電晶體333可因感應電壓Va下降而增大其負偏 壓’如此第二光感應電晶體333就會產生較高之第二光電流ipM以 降低差值電流Ipdif，故可提供進一步補償效應而使光感應輸入運作 具有更高可靠度。 第7圖為本發明第四實施例的具光感應輸入機制之液晶顯示器 的示意圖。如第7圖所示，液晶顯示器400係類似於第1圖所示之 液晶顯示器100，主要差異在於將複數光感應輸入裝置11()置換為 複數光感應輸入裝置410’並另包含複數第三偏壓線406,其中光感 應輸入裝置DAn—m係被置換為光感應輸入裝置DDn_m。每一條第 三偏壓線406係用來傳輸第三共用電壓Vc3。光感應輸入裝置 DDn—m係類似於光感應輸入裝置DAn—m，主要差異在於將第一光 感應單元120置換為第一光感應單元420,並將第二光感應單元13〇 置換為第二光感應單元430。第一光感應單元420包含第一光感應 電晶體421與第一彩色濾光片429。第二光感應單元43〇包含第二 光感應電晶體43卜第三光感應電晶體433與第二彩色濾光片439。 第一光感應電晶體421具有一電連接於電容141的第一端、一 用來接收第三共用電壓Vc3的閘極端、及一用來接收第一共用電壓 Vcl的第二端。對應於第一光感應電晶體421的第一彩色濾光片429 係用來濾、出入射光訊號之落於第一光波長範圍的入射光分量。第二 201243814 光感應電晶體431具有一電連接於電容141的第一端、一用來接收 第二共用電壓Vc3的閘極端、及一電連接於第三光感應電晶體 的第二端。第三光感應電晶體433具有一電連接於第二光感應電晶 體431之第二端的第一端、一電連接於第二光感應電晶體431之第 一端的閘極端、及一用來接收第二共用電壓Vc2的第二端。對應於 第二光感應電晶體431與第三光感應電晶體433的第二彩色濾光片 439係用來濾出入射光訊號之落於第二光波長範圍的入射光分量。 在一實施例中，第二共用電壓Vc2係大於第一共用電壓Vci，且第 一共用電壓Vcl係大於第三共用電壓Vc3，據以使第一光感應電晶 體42卜第二光感應電晶體431與第三光感應電晶體433在運作過 程中均持續保持在逆偏狀態。液晶顯示器4〇〇的光感應輸入運作原 理可根據上述第4圖之液晶顯示器200的光感應輸入運作原理配合 第6圖之第三光感應電晶體333的補償效應而類推，不再贅述。 第8圖為本發明第五實施例的具光感應輸入機制之液晶顯示器 的示意圖。如第8圖所示，液晶顯示器5〇〇係類似於第！圖所示之 液晶顯示器100，主要差異在於將複數光感應輸入裝置11()置換為 複數光感應輸入裝置510’其中光感應輸入裝置DAn_m係被置換為 光感應輸入裝置DEn_m。光感應輸入裝置DEn_m亦類似於光感應 輸入裝置DAn_m’主要差異在於將第一光感應單元12〇置換為第一 光感應單元520，並將第二光感應單元no置換為第二光感應單元 530。第一光感應早元520包含第一光感應電晶體521、第四光感應 電晶體523與第一彩色濾光片529。第二光感應單元53〇包含第二 光感應電晶體53卜第三光感應電晶體533與第二彩色遽光片539。 15 201243814 第一光感應電晶體521具有一電連接於電容141的第一端、一 用來接收閘極訊號SGn+1的閘極端、及一電連接於第四光感應電晶 體523的第二端。第四光感應電晶體523具有一電連接於第一光感 應電晶體521之第二端的第一端、一用來接收第一共用電壓Vcl的 閘極端、及一用來接收第一共用電壓Vcl的第二端。對應於第一光 感應電晶體521與第四光感應電晶體523的第一彩色濾光片529係 用來濾出入射光訊號之落於第一光波長範圍的入射光分量。第二光 感應電晶體531具有一電連接於電容141的第一端、一用來接收閘 極訊號SGn+Ι的閘極端、及一電連接於第三光感應電晶體533的第 二端。第三光感應電晶體533具有一電連接於第二光感應電晶體531 之第二端的第一端、一電連接於第二光感應電晶體531之第一端的 閘極端、及一用來接收第二共用電壓Vc2的第二端。對應於第二光 感應電晶體531與第三光感應電晶體533的第二彩色濾光片539係 用來濾出入射光訊號之落於第二光波長範圍的入射光分量。當入射 光訊號只包含背景白光時，若差值電流Ipdif因光電流/偏壓特性曲 線偏移而上昇，則第四光感應電晶體523會根據較小的壓降以降低 第一光電流Iphl，進而降低差值電流Ipdif，故可提供進一步補償效 應而使光感應輸入運作具有更高可靠度。 第9圖為本發明第六實施例的具光感應輸入機制之液晶顯示器 的示意圖。如第9圖所示，液晶顯示器6〇〇係類似於第i圖所示之 液晶顯示器100，主要差異在於將複數光感應輸入裝置11〇置換為 複數光感應輸入裝置610，並另包含複數第三偏壓線6〇6，其中光感 應輸入裝置DAn—m係被置換為光感應輸入裝置DFn__m。每一條第 201243814 三偏壓線606係用來傳輸第三共用電壓Vc3。光感應輸入裝置 DFn_m亦類似於光感應輸入裝置DAn_m，主要差異在於將第一光 感應單元120置換為第一光感應單元620,並將第二光感應單元13〇 置換為第二光感應單元630。第一光感應單元620包含第一光感應 電晶體621、第四光感應電晶體623與第一彩色濾光片629。第二光 感應單元630包含第二光感應電晶體631、第三光感應電晶體633 與第二彩色濾光片639。 第一光感應電晶體621具有一電連接於電容141的第一端、一 用來接收第三共用電壓Vc3的閘極端、及一電連接於第四光感應電 晶體623的第二端。第四光感應電晶體623具有一電連接於第一光 感應電晶體621之第二端的第一端、一用來接收第一共用電壓vci 的閘極端、及一用來接收第一共用電壓Vcl的第二端。對應於第一 光感應電晶體621與第四光感應電晶體623的第一彩色渡光片629 係用來丨慮出入射光訊號之落於第一光波長範圍的入射光分量。第二 光感應電晶體631具有一電連接於電容141的第一端、一用來接收 第三共用電壓Vc3的閘極端、及一電連接於第三光感應電晶體633 的第一端。第二光感應電晶體633具有一電連接於第二光感應電晶 體631之第二端的第一端、一電連接於第二光感應電晶體631之第 一端的閘極端、及一用來接收第二共用電壓Ve2的第二端。對應於 第二光感應電晶體631與第三光感應電晶體633的第二彩色濾光片 639係用來濾出入射光訊號之落於第二光波長範圍的入射光分量。 液晶顯示器600的光感應輸入運作原理可根據上述第4圖之液晶顯 示器200的光感應輸入運作原理配合第6圖之第三光感應電晶體 17 201243814 333及第8圖之第四光感應電晶體523的補償效應而類推，不再贊 述。 第10圖為本發明第七實施例的具光感應輸入機制之液晶顯示 器的示意圖。如第10圖所示，液晶顯示器700係類似於第1圖所示 之液aa顯示器100 ’主要差異在於將被數光感應輸入裳置HQ置換 為複數光感應輸入裝置710’其中光感應輸入裝置DAn_m係被置換 為光感應輸入裝置DGn_m。光感應輸入裝置DGn_m亦類似於光感 應輸入裝置DAn_m，主要差異在於將第一光感應單元12〇置換為第 一光感應單元720，並將第二光感應單元13〇置換為第二光感應單 元730。第一光感應單元720包含第一光感應電晶體721、第四光感 應電晶體723與第一彩色濾光片729。第二光感應單元730包含第 二光感應電晶體731、第三光感應電晶體733與第二彩色濾光片739。 第一光感應電晶體721具有一電連接於電容mi的第一端、一 用來接收閘極訊號SGn+Ι的閘極端、及一電連接於第四光感應電晶 體723的第二端。第四光感應電晶體723具有一電連接於第一光感 應電晶體721之第二端的第一端、一用來接收閘極訊號3(^+1的閘 極端、及-用來接收第-共用電壓Vcl的第二端。對應於第一_ 應電晶體721與第四光感應電晶體723的第一彩色滤光片729係用 來濾出入射光訊號之落於第一光波長範圍的入射光分量。第二光感 應電晶體731具有-電連接於電容141的第一端、一用來接收閉極 訊號SGn+1的閘極端、及一電連接於第三光感應電晶體733的第二 端。第二光感應電晶體733具有-電連接於第二光感應電晶體731 之第二端的第-端、-電連接於第二光感應電晶體731之第一端的 18 201243814 閘極端、及一用來接收第二共用電壓Vc2的第二端。對應於第二光 感應電晶體731與第三光感應電晶體733的第二彩色濾光片係 用來濾出入射光訊號之落於第二光波長範圍的入射光分量。當入射 光訊號只包含背景白糾，若差值電流Ipdif因光電流/偏壓特性曲 線偏移而上昇，則第四光感應電晶體723會根據較小的壓降以降低 第一光電流Iphl，進而降低差值電流Ipdif，故可提供進一步補償效 應而使光感應輸入運作具有更高可靠度。 第11圖為本發明第八實施例的具光感應輸入機制之液晶顯示 器的示意圖。如第11圖所示，液晶顯示器8〇〇係類似於第i圖所示 之液晶顯示器100，主要差異在於將複數光感應輸入裝置11〇置換 為複數光感應輸入裝置810，並另包含複數第三偏壓線8〇6，其中光 感應輸入裝置DAn_m係被置換為光感應輸入裝置DHn_m。每一條 第三偏壓線806係用來傳輸第三共用電壓Vc3。光感應輸入裝置 DHn—m亦類似於光感應輸入裝置DAn_m，主要差異在於將第一光 感應單元120置換為第一光感應單元82〇，並將第二光感應單元13〇 置換為第二光感應單元830。第一光感應單元820包含第一光感應 電晶體821、第四光感應電晶體823與第一彩色濾光片829。第二光 感應單元830包含第二光感應電晶體831、第三光感應電晶體幻3 與第二彩色濾光片839。 第一光感應電晶體821具有一電連接於電容141的第一端、一 用來接收第三共用電壓Vc3的閘極端、及一電連接於第四光感應電 晶體823的第二端。第四光感應電晶體823具有一電連接於第一光 感應電晶體821之第二端的第一端、一用來接收第三共用電壓Vc3 19 201243814 的閘極端、及一用來接收第一共用電壓VC1的第二端。對應於第一 光感應電晶體821與第四光感應電晶體823的第一彩色慮光片829 係用來濾出入射光§fU虎之落於第一光波長範圍的入射光分量。第二 光感應電晶體831具有一電連接於電容丨41的第一端、一用來接收 第三共用電壓Vc3的閘極端、及一電連接於第三光感應電晶體833 的第一端。第二光感應電晶體833具有一電連接於第二光感應電晶 體831之第二端的第一端、一電連接於第二光感應電晶體831之第 一端的閘極端、及一用來接收第二共用電壓Vc2的第二端。對應於 第二光感應電晶體831與第三光感應電晶體833的第二彩色濾光片 839係用來濾出入射光訊號之落於第二光波長範圍的入射光分量。 液晶顯示器800的光感應輸入運作原理可根據上述第4圖之液晶顯 示器200的光感應輸入運作原理配合第6圖之第三光感應電晶體 333及第1〇圖之第四光感應電晶體723的補償效應而類推，不再贅 述0 綜上所述，在本發明具光感應輸入機制之液晶顯示器的運作 中，藉由第一光感應電晶體與第二光感應電晶體的光電流/偏壓特性 曲線偏移補償效應，偏壓工作範圍在長時間偏壓/照光運作後僅略為 縮小，所以仍可提供足夠大的偏壓工作範圍以避免發生輸入狀態誤 判狀況。此外，藉由第一彩色濾光片與第二彩色濾光片的運作，則 可提供高光感應靈敏度。亦即，本發明液晶顯示器的光感應輸入運 作係兼具高可靠度及高靈敏度。 雖然本發明已以實施例揭露如上，然其並非用以限定本發明， 任何具有本發明所屬技術領域之通常知識者，在不脫離本發明之精 201243814 因此本發明之保護範圍當視 神和範圍内’當可作各種更動與潤飾， 後附之申請專利範圍所界定者為準。 【圖式簡單說明】 第1圖為本發明第-實施_具光感應輸入機制之液晶顯示器 的示意圖。 第2圖為第1圖所示之液曰曰顯示器運作時的差值電流ipdif對偏 壓VgS變化之關係示意圖。 第3圖為第1圖所示之液晶顯示器的工作相關訊號波形示意圖， 其中橫軸為時間軸。 第4圖為本發明第二實施例的具光感應輸入機制之液晶顯示器 的示意圖。 第5圖為第4圖所示之液晶顯示器的工作相關訊號波形示意圖， 其中橫軸為時間軸。 第6圖為本發明第三實施例的具光感應輸入機制之液晶顯示器 的示意圖。 第7圖為本發明第四實施例的具光感應輸入機制之液晶顯示器 的示意圖。 第8圖為本發明第五實施例的具光感應輸入機制之液晶顯示器 的示意圖。 第9圖為本發明第六實施例的具光感應輸入機制之液晶顯示器 的示意圖。 21 201243814 第1 〇圖為本發明第七實施例的具光感應輸入機制之液晶顯示器 的示意圖。 第11圖為本發明第八實施例的具光感應輸入機制之曰 的示意圖。 ·'’、π器 【主要元件符號說明】 液晶顯示器 閘極線 資料線 讀出線 第一偏壓線 第二偏壓線 光感應輸入裝置 第一光感應單元 第一光感應電晶體 第一彩色濾光片 第二光感應平元 100、200、300、400、 500、600、700、800 101 102 103 104 105 110 120、 220、420、520、 620、 720、820 121、 221、421、521、 621、 721、821 129、 229、429、529、 629、 729、829 130、 330、430、530、 630、 730、830 22 201243814 131 > 331 ' 431 > 531 631、731、831 139、339、439、539 639、739、839 140 141 150 151 180 190 206、406、606、806 333、433、533、633 733 、 833 523、623、723、823 BXn+1 BYn+1 BZn+1 CASJ、CAS_2、 CBS_1 > CBS_2 DAn—m、DBn m、 DCn m、DDn_m、 DEn m、DFn m、 第二光感應電晶體 第二彩色濾光片 儲能單元 電容 讀出單元 電晶體 訊號處理單元 晝素單元 第三偏壓線 第三光感應電晶體 第四光感應電晶體 第一偏壓線 第二偏壓線 第三偏壓線 關係曲線 光感應輸入裝置 23 201243814 DGn—m、DHn m、 GLn、GLn+1 閘極線 Ipdif 差值電流 Iphl 第一光電流 Iph2 第二光電流 Ith 臨界電流 RLm 讀出線 SGn ' SGn+1 閘極訊號 Sro_m 讀出訊號 Tal、Ta2、Ta3、Tbl、 時段 Tb2、Tb3 Va 感應電麼 Vcl 第一共用電壓 Vc2 第二共用電壓 Vc3 第三共用電壓 Vgs、Vgsl、Vgs2、 偏壓 Vgs3、Vgs4 Vout 輸出電壓 Vst 起始電壓 24201243814 VI. Description of the invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a liquid crystal display, Especially a liquid crystal display with a light-sensing input mechanism. [Prior Art] In recent years, electronic products with panel input mechanisms have become popular trends. The input display is used as a communication interface between the user and the electronic product. Allows users to directly access the operation of the 7F wire (4) electronic products. No need to slap the disk or the mouse. The input type display ϋ input mechanism is divided into domain input mode and touch input mode. It: Touching the input mode display can easily cause the display to be drawn again due to the frequent touch action of the display. Therefore, the light money input mode shows that H can have a longer life. In general, The light-sensing input mode is such that the photocurrent/bias characteristic curve of the (IV) domain transistor changes with the brightness of the human light. Basically when it comes to timing, The higher the brightness of a person's light, the greater the flow of light f. _ _ _ depends on the operating characteristics of different photoelectric flows to perform input sensing. #如的光光流# The resulting photo-current can be expressed as the first-input state, In the second incident light brightness of the brightness of the remaining person, the employee’s H money can represent the second input state. Where the first photocurrent system is greater than a predetermined threshold, And the third photocurrent system is less than a preset threshold. however, Long-term bias/illumination operations can cause shifts in the photocurrent/bias (four) curve. Therefore, the photoelectric age corresponding to the same test and the brightness of the same person is getting larger and larger with the long-term bias/illumination operation. that is, After a long period of bias/illumination, If the 201243814 bias working range is not large enough, The second photocurrent may be higher than the preset threshold due to the characteristic curve shift. In this case, the input status misjudgment will occur. This causes a malfunction of the subsequent stage circuit. SUMMARY OF THE INVENTION According to an embodiment of the present invention, Disclosed is a liquid crystal display device having a light sensing input mechanism, which includes a gate line for transmitting a gate signal, a data line for transmitting data signals, An energy storage unit for storing the induced voltage, a unit of unit, a first-light sensing unit, -Second light sensing single it, And - reading the single-cardiac unit connected to the idle line and the data line is used to output the image number according to the gate signal and the data signal. The first light sensing unit electrically connected to the energy storage unit is configured to generate a first photocurrent according to the first common voltage and the incident light signal. The first photo-sensing element connected to the first photo-sensing unit and the energy storage element is used to generate a second photocurrent according to the second mound voltage and the incident light signal different from the first common voltage. The difference current between the second photocurrent and the first photocurrent is used to adjust the induced voltage. The readout unit electrically connected to the energy storage unit and the gate line is configured to output a read signal based on the induced voltage and the gate signal. [Embodiment] Hereinafter, a liquid crystal display having a light sensing input mechanism according to the present invention, The specific embodiments are described in detail in conjunction with the drawings, However, the examples provided are not intended to limit the scope of the invention. Fig. 1 is a schematic view showing a liquid crystal display having a light-sensing wheel human mechanism according to a first embodiment of the present invention. As shown in Figure 1, The liquid crystal display 100 includes a plurality of gate lines 1 〇 1, 201243814 plural data line 102, Multiple readout lines 1〇3, a plurality of first bias lines 1〇4, a plurality of second bias lines 1〇5, Complex pixel unit 19〇, a plurality of optical sensing input devices, And a tonnage processing unit 18G. Each gate is made to transmit the corresponding gate signal. Each data line 102 is used to transmit corresponding data signals. Each pixel unit 19 is used to perform the corresponding data message writing operation according to the system tfl number. According to the output of the corresponding image signal. Each of the -first bias lines 1 () 4 is used to transmit the first voltage. Each of the second bias lines 105 is used to transmit a second common voltage Vc2. Each of the readout lines 103 is electrically connected to the plurality of optical sensing input devices n〇. Used to transmit the corresponding read signal. A signal processing unit 18 electrically coupled to the plurality of s sell lines 103 is operative to convert each read signal to a corresponding output voltage Vout. In the embodiment shown in Figure 1, Each of the pixel units is adjacent to the light sensing input device 110. In another embodiment, The light sensing input device 110 is provided with a plurality of gate lines 101 spaced apart. Or set the interval data line 1〇2, That is, not every pixel unit 190 is adjacent to the photo sensing input device no. Similarly, The first bias line 1〇4 is disposed corresponding to the first bias line by a plurality of gate lines ιοί, Or the readout line 103 can be set correspondingly to the plurality of data lines 1〇2. Hereinafter, the light sensing input device DAn_m is used to explain the coupling relationship of each component and the operation principle of the circuit. The rest of the light sensing input device 110 can be analogized analogously. The light sensing input device DAn_m includes a first light sensing unit 120, The second light sensing unit 130, Energy storage unit 140, And reading unit 150. The energy storage unit 140 is for storing the induced voltage Va. Electrically connected to the energy storage unit 140, The first light sensing unit 120 of the gate line GLn+1 and the first bias line BXn+1 is used to generate the first photo current Iph1 according to the gate signal SGn+b the first common voltage Vcl and the incident light signal. Electrically connected to the 201243814 second secret BY (four), The first photo-sensing unit (10) and the second photo-sensing unit 130 of the energy storage unit i4G are configured to reduce the second photo-current cell according to the second common voltage μ different from the first common voltage Vci and the incident light. The difference between the second light cake 2 and the first photocurrent Iphl current lpdif is the rib adjustment induced voltage %. The read material 15() _ electrically connected to the energy storage unit (10) and the _ line GLn outputs the read signal Sro_m according to the induced voltage ^ and the gate signal SGn. In the embodiment of Figure 1, The first light sensing unit 120 includes a first photo-inductive transistor 121 and a first-color filter, Light sheet 129, The second light sensing unit 13A includes a second light sensing transistor 131 and a second color light film 139. The energy storage unit 14A includes a capacitor. The readout unit 150 includes a transistor (5). The first photo-inductive transistor 121 has a first end electrically connected to the capacitor 141, a gate used to receive the gate signal (4), And - a second end for receiving the first voltage Vel. The first color filter ι29 of the first photo-sensing transistor 121 is used to filter out the human-light component of the incident optical signal that falls on the first-light wavelength range U. The light sensing band of the first light sensing unit 12() is also the first light wavelength range. The capacitor 141 is electrically connected between the first end and the second end of the first photo-induced transistor 121. The transistor 151 has a first end for receiving the induced voltage Va, a gate terminal for receiving the gate signal SGn, And a second end for outputting the read signal Sro_m. The second photo-inductive transistor 131 includes a first end, Second end and gate extreme, The first end and the gate terminal are electrically connected to the capacitor 141, The second end is for receiving the second common voltage Vc2. The second color filter 139 corresponding to the second photo-sensing transistor 13 is used to extract the incident light component of the incident optical signal that falls within the second optical wavelength range, that is, the optical sensing band of the second optical sensing unit 130. It is the second wavelength range of light. The second optical wavelength range 201243814 may partially overlap or not overlap the first-optical wavelength range. In another embodiment, The first color filter m and the second color filter, The light sheet 139 can be omitted. The first light sensing unit 12A and the second domain fresh element HG have substantially a domain segment. In the operation of the liquid crystal display, Since the photocurrent/bias characteristic curve shifts of the first photo-induced transistor 121 and the second photo-inductive transistor 131 can substantially compensate each other, Therefore, the relationship between the differential current Ipdif and the bias voltage Vgs is hardly affected by the long-term bias/illumination operation, which provides a highly reliable optical sensing input mechanism. Fig. 2 is a diagram showing the relationship between the difference current shunt and the bias voltage Vgs when the liquid crystal display shown in Fig. 1 operates. Line CBS-H is used to display the current ipdif/bias of the L-emission height before the long-term bias/illumination operation. relationship, The curve CBS-2 is used to display the relationship of the difference current Ipdif/bias Vgs corresponding to the south incident light before the long-term bias/illumination operation, The curve CAS_1 is used to display the difference current Ipdif/bias Vgs relationship corresponding to the low incident light height after a long-term bias/illumination operation. Curve CAS-2 is used to show the difference current Ipdif/bias Vgs relationship corresponding to the height of high incident light after long-term bias/illumination operation. The critical current Ith is used to judge the input state corresponding to the difference current ipdif. As shown in Fig. 2, according to the relationship curves CBSj and cbs_2, the bias operating range between Vgsl and Vgs3 before long-term bias/illumination operation can be defined. According to the relationship curves CAS_1 and CAS_2, the bias operating range between Vgs2 and Vgs4 after long-term bias/illumination operation can be defined. As mentioned above, Since the photocurrent/bias characteristic offset compensation effect of the first photo-induced transistor 121 and the second photo-inductive transistor 13i is different, the difference current Ipdif/bias Vgs curve only occurs after long-term bias/illumination operation Trace offset, Therefore, it is suitable for the biasing work before and after the long-term bias/illumination operation. 2012-0414 I The difference between Vgsl, That is to say, a sufficiently large working range can be provided to avoid the occurrence of misjudgment of the input state. . The photocurrent of the monthly light-sensing transistor 121 and the second photo-inductive transistor (3) is offset. The compensation effect is basically based on the incident light as the background white light. The surrounding light pen performs the light input operation', and the light intensity of the light pen incident light processed by the first color filter 129 is hardly attenuated. Therefore, the first light-sensing unit 12 〇 can sense the incident light of the light pen with little attenuation, and the light intensity after the treatment of the second color (four) pupil 139 of the light pen is slightly attenuated. Therefore, the operation of the second photo-sensing transistor 131 is hardly affected by the incident light of the stylus. that is, When the incident light of the light pen is irradiated to the light sensing input device DAn_m, A relatively high difference current Ipdif' can be generated to provide high light sensitivity. As can be seen from the above, The optical sensing input operation of the liquid crystal display 100 has both high reliability and high sensitivity. Fig. 3 is a schematic diagram showing the operation-related signal waveform of the liquid crystal display shown in Fig. 1 wherein the horizontal axis is the time axis. In Figure 2, The signals from top to bottom are the gate signal SGn, The gate signal SGn+b corresponds to the induced voltage Va of the low incident light brightness, And an induced voltage Va corresponding to the brightness of the high incident light. See Figure 3 and Figure 1, During the time period Tal, The high-level voltage of the gate signal SGn+Ι can turn on the first photo-inductive transistor 121, Further, the induced voltage Va is reset to the initial voltage Vst. In the time period Ta2, The low level voltage of the gate signal SGn+Ι causes the first photo-inductive transistor 121 to enter an off state. At this time, the first photo-sensing transistor 121 can sense the incident optical signal to generate the first photocurrent Iphl, The second photo-inductive transistor 131 can sense the incident optical signal to generate the second light 201243814 current Iph2′ and the difference current Ipdif between the first photo current Iph1 and the second photo current iph2 is used to discharge the capacitor 141 to adjust the sensing. Voltage Va. When the incident light signal only contains background white light (corresponding to low incident light brightness), Due to the offset effect of the photocurrent/bias characteristic curve of the first photo-induced transistor 121 and the first photo-inductive transistor 131, Whether or not it has been subjected to long-term bias/illumination, As shown in Figure 3, The induced voltage Va corresponding to the low incident light intensity is only slightly decreased in accordance with the differential current Ipdif which is relatively low and hardly affected by the operation time. When the incident light signal includes background white light and light pen incident light, The second photocurrent Iph2 is hardly affected by the incident light of the pen, The first photocurrent Iphl is significantly increased by the incident light of the light pen, so the difference current Ipdif also increases significantly. At this point, as shown in Figure 3, The induced voltage Va corresponding to the high incident light luminance is largely lowered in accordance with the relatively high difference current Ipdif. In the time period Ta3, The high-level voltage of the gate signal SGn can conduct the crystal 151 to output the read signal Sro-m, The induced voltage Va is pulled up during the reading process. Fig. 4 is a view showing the liquid crystal display number of the optical induction input mechanism according to the first embodiment of the present invention. As shown in Figure 4, The liquid crystal display 200 is similar to the liquid crystal display 100 shown in FIG. The main difference is that the complex optical inductive input device 11 is replaced by a plurality of optical inductive input devices 210' and further includes a plurality of third bias lines 2〇6, The light sensing input device DAn_m is replaced with a light sensing input device DBn-m. Each of the second bias lines 206 is for transmitting a second common voltage Vc3. The light sensing input device DBn_m is similar to the light sensing input device DAn-m, The main difference is that the first light sensing unit 120 is replaced with the first light sensing unit 220. The first light sensing unit 22 includes a first photo-induced transistor 221 and a first color filter 229. First photo-induced electro-optic crystal 11 201243814 body 221 has a first end electrically connected to capacitor 141, a gate terminal for receiving the third common voltage Vc3, And a second end for receiving the first common voltage Vcl. The first color filter 229 corresponding to the first photo-inducting transistor 221 is for filtering out incident light components of the incident optical signal that fall within the first optical wavelength range. In an embodiment, The second common voltage Vc2 is greater than the first common voltage Vcl, And the first common voltage Vcl is greater than the second common voltage Ve3, Therefore, the first photo-induced transistor 221 and the second photo-inductive transistor 131 are maintained in a reverse bias state during operation. Fig. 5 is a schematic diagram showing the operation-related signal waveform of the liquid crystal display shown in Fig. 4, wherein the 4-page axis is the time axis. In Figure 5, The signals from top to bottom are the gate signal SGn, Gate signal SGn^H, The induced voltage % corresponding to the low incident light brightness, And the induced voltage Vae corresponding to the brightness of the high incident light, see Figures 5 and 4, In the time period Tbi, The high-level voltage of the gate signal SGn can conduct the transistor 151 to output the readout sfl number Sro_m' and the induced voltage Va is reset to the initial voltage Vste during the period Tb2 during the readout process. The low level voltage of the gate signal SGn can make the transistor 151 enter the off state. At this time, the first photo-inductive transistor 221 can sense the incident optical signal to generate the photo-current Iphl. The first photo-inductive transistor (3) can sense the incident optical signal to generate the second photo-current Iph2. And the first - photocurrent! The difference between phl and the second illuminator current Ipdif is used to discharge the capacitor 141 to adjust the induced voltage %. When the incident light shouts only includes the background white light, the photocurrent/bias characteristic offset compensation effect of the first photo-induced transistor 221 and the second photo-inductive transistor 131 is affected, Whether or not it has been subjected to long-term bias/lighting operations, As shown in Figure 5, The induced voltage Va corresponding to the low incident light luminance is only slightly decreased in accordance with the differential current Ipdif which is relatively low and hardly affected by the operation time. 12 201243814 When the incident light signal contains background white light and light pen incident light, The second photocurrent Iph2 is hardly affected by the incident light of the pen, The first photocurrent Iphl is significantly increased by the incident light of the light pen. Therefore, the difference current Ipdif also increases significantly. At this time, as shown in Figure 5, The induced voltage Va corresponding to the high incident light luminance is largely lowered in accordance with the relatively high difference current Ipdif. During the period Tb3, the high-level voltage of the gate signal SGn can re-conduct the transistor 151 to output the read signal Sro_m', and the induced voltage Va is reset to the start voltage Vst during the readout. Please note, The operation of the light-sensing input device 〇 11 11_111 is not controlled by the gate signal SGn+Ι. The reset operation of the initial voltage Vst is completed at the completion of the readout process. Therefore, no additional reset exclusive period is required to reset the initial voltage Vst. Basically, The light sensing input mechanism of the liquid crystal display 200 is substantially similar to the liquid crystal display 100 shown in the figure. Therefore, its optical sensing input operation still has high reliability and high sensitivity. Fig. 6 is a view showing a liquid crystal display with a light sensing input mechanism according to a third embodiment of the present invention. As shown in Figure 6, The LCD 300 is similar to the first! The liquid crystal display 100 shown in the figure, The main difference is that the complex optical inductive input device 11 is replaced by a complex optical inductive input device 310. The optical inductive input device DAn_m is replaced by a photoinductive input device DCn_m. The light sensing input device DCn_m is also similar to the light sensing input device DAn-m, The main difference is that the second light sensing unit 13A is replaced with the second light sensing unit 330. The second light sensing unit 330 includes a second photo-induced transistor 331, The third photo-induced transistor 333 and the second color filter 339. The second photo-inductive transistor 331 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the gate signal 3 (}11+1, And electrically connected to the second end of the third photo-induced transistor 333. The third photo-inductive transistor 333 has a first end electrically connected to the second end of the second photo-inductive transistor 331, a gate terminal electrically connected to the first end of the second photo-induced transistor 331 And 13 201243814 a second end for receiving the second common voltage Vc2. A second color filter 'light 339 corresponding to the second photo-induced transistor 331 and the second photo-inductive transistor 333 is used for filtering, The incident light component of the incident light signal that falls within the second optical wavelength range. When the incident light signal only contains background white light, If the difference current Ipdif rises due to the shift of the photocurrent/bias characteristic curve, the third photo-inductive transistor 333 can increase its negative bias voltage due to the decrease of the induced voltage Va. Thus, the second photo-inductive transistor 333 will Producing a higher second photocurrent iPM to reduce the difference current Ipdif, Therefore, a further compensation effect can be provided to make the optical sensing input operation more reliable. Figure 7 is a schematic diagram of a liquid crystal display with a light sensing input mechanism according to a fourth embodiment of the present invention. As shown in Figure 7, The liquid crystal display 400 is similar to the liquid crystal display 100 shown in FIG. The main difference is that the complex optical inductive input device 11() is replaced by a plurality of optical inductive input devices 410' and further includes a plurality of third bias lines 406, The light sensing input device DAn-m is replaced by a light sensing input device DDn_m. Each of the third bias lines 406 is for transmitting a third common voltage Vc3. Optical sensing input device DDn-m is similar to optical sensing input device DAn-m, The main difference is that the first light sensing unit 120 is replaced with the first light sensing unit 420. The second light sensing unit 13A is replaced with the second light sensing unit 430. The first light sensing unit 420 includes a first photo-induced transistor 421 and a first color filter 429. The second light sensing unit 43A includes a second light sensing transistor 43, a third light sensing transistor 433 and a second color filter 439. The first photo-inductive transistor 421 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the third common voltage Vc3, And a second end for receiving the first common voltage Vcl. The first color filter 429 corresponding to the first photo-inductive transistor 421 is used for filtering, The incident light component of the incident light signal that falls within the first wavelength range of light. The second 201243814 photo-sensing transistor 431 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the second common voltage Vc3, And electrically connected to the second end of the third photo-inductive transistor. The third photo-inductive transistor 433 has a first end electrically connected to the second end of the second photo-inductive transistor 431, a gate terminal electrically connected to the first end of the second photo-inductive transistor 431, And a second end for receiving the second common voltage Vc2. The second color filter 439 corresponding to the second photo-induced transistor 431 and the third photo-inductive transistor 433 is used to filter out incident light components of the incident optical signal that fall within the second optical wavelength range. In an embodiment, The second common voltage Vc2 is greater than the first common voltage Vci, And the first common voltage Vcl is greater than the third common voltage Vc3, Therefore, the first photo-induced electro-optic crystal 42 and the second photo-induced transistor 431 and the third photo-induced transistor 433 are continuously maintained in a reverse bias state during operation. The optical sensing input operation principle of the liquid crystal display can be based on the optical sensing input operation principle of the liquid crystal display 200 of FIG. 4 and the compensation effect of the third optical sensing transistor 333 of FIG. No longer. Figure 8 is a schematic diagram of a liquid crystal display with a light sensing input mechanism according to a fifth embodiment of the present invention. As shown in Figure 8, The LCD monitor 5 is similar to the first! The liquid crystal display 100 shown in the figure, The main difference is that the complex optical inductive input device 11() is replaced by a complex optical inductive input device 510' in which the optical inductive input device DAn_m is replaced by a photoinductive input device DEn_m. The light sensing input device DEn_m is also similar to the light sensing input device DAn_m'. The main difference is that the first light sensing unit 12 is replaced by the first light sensing unit 520. The second light sensing unit no is replaced with the second light sensing unit 530. The first light sensing early element 520 includes a first light sensing transistor 521, The fourth photo-induced transistor 523 is coupled to the first color filter 529. The second light sensing unit 53A includes a second light sensing transistor 53, a third light sensing transistor 533 and a second color light beam 539. 15 201243814 The first photo-inductive transistor 521 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the gate signal SGn+1, And electrically connected to the second end of the fourth photo-inductive transistor 523. The fourth photo-induced transistor 523 has a first end electrically connected to the second end of the first photo-sensing transistor 521, a gate terminal for receiving the first common voltage Vcl, And a second end for receiving the first common voltage Vcl. The first color filter 529 corresponding to the first photo-inductive transistor 521 and the fourth photo-inductive transistor 523 is used to filter out incident light components of the incident optical signal that fall within the first optical wavelength range. The second photo-induced transistor 531 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the gate signal SGn+Ι, And electrically connected to the second end of the third photo-induced transistor 533. The third photo-induced transistor 533 has a first end electrically connected to the second end of the second photo-inductive transistor 531, a gate terminal electrically connected to the first end of the second photo-induced transistor 531, And a second end for receiving the second common voltage Vc2. The second color filter 539 corresponding to the second photo-induced transistor 531 and the third photo-inductive transistor 533 is used to filter out incident light components of the incident optical signal that fall within the second optical wavelength range. When the incident light signal only contains background white light, If the difference current Ipdif rises due to the photocurrent/bias characteristic curve shift, Then, the fourth photo-induced transistor 523 lowers the first photocurrent Iphl according to a smaller voltage drop. Further reducing the difference current Ipdif, Therefore, further compensation effects can be provided to make the optical sensing input operation more reliable. Figure 9 is a schematic diagram of a liquid crystal display with a light sensing input mechanism according to a sixth embodiment of the present invention. As shown in Figure 9, The liquid crystal display 6 is similar to the liquid crystal display 100 shown in FIG. The main difference is that the complex optical inductive input device 11 is replaced by a complex optical inductive input device 610. And further comprising a plurality of third bias lines 6〇6, The light sensing input device DAn-m is replaced by a light sensing input device DFn__m. Each of the second 201243814 bias lines 606 is used to transmit a third common voltage Vc3. The light sensing input device DFn_m is also similar to the light sensing input device DAn_m, The main difference is that the first light sensing unit 120 is replaced with the first light sensing unit 620. The second light sensing unit 13A is replaced with the second light sensing unit 630. The first light sensing unit 620 includes a first photo-induced transistor 621, The fourth photo-induced transistor 623 and the first color filter 629. The second light sensing unit 630 includes a second light sensing transistor 631, The third photo-induced transistor 633 and the second color filter 639. The first photo-inductive transistor 621 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the third common voltage Vc3, And electrically connected to the second end of the fourth photo-inductive transistor 623. The fourth photo-inductive transistor 623 has a first end electrically connected to the second end of the first photo-inductive transistor 621, a gate terminal for receiving the first common voltage vci, And a second end for receiving the first common voltage Vcl. The first color aperture 629 corresponding to the first photo-induced transistor 621 and the fourth photo-inductive transistor 623 is used to take into account the incident light component of the incident optical signal that falls within the first wavelength range. The second photo-induced transistor 631 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the third common voltage Vc3, And electrically connected to the first end of the third photo-induced transistor 633. The second photo-induced transistor 633 has a first end electrically connected to the second end of the second photo-inductive transistor 631, a gate terminal electrically connected to the first end of the second photo-sensing transistor 631, And a second end for receiving the second common voltage Ve2. The second color filter 639 corresponding to the second photo-induced transistor 631 and the third photo-inductive transistor 633 is used to filter out incident light components of the incident optical signal that fall within the second optical wavelength range. The operation principle of the light-sensing input of the liquid crystal display 600 can be matched with the operation principle of the light-sensing input of the liquid crystal display 200 of the above-mentioned FIG. 4, together with the third photo-inductive transistor 17 of FIG. 6 201243814 333 and the fourth photo-inductive transistor of FIG. 523's compensation effect and so on, No longer praise. Fig. 10 is a view showing a liquid crystal display device having a light sensing input mechanism according to a seventh embodiment of the present invention. As shown in Figure 10, The liquid crystal display 700 is similar to the liquid aa display 100 shown in FIG. 1 'mainly differs in that the digital light sensing input skirt HQ is replaced with a plurality of light sensing input devices 710' in which the light sensing input device DAn_m is replaced by light sensing. Input device DGn_m. The light sensing input device DGn_m is also similar to the light sensing input device DAn_m, The main difference is that the first light sensing unit 12 is replaced by the first light sensing unit 720. The second light sensing unit 13A is replaced with a second light sensing unit 730. The first light sensing unit 720 includes a first photo-induced transistor 721, The fourth light sensing transistor 723 and the first color filter 729. The second light sensing unit 730 includes a second light sensing transistor 731, The third photo-induced transistor 733 and the second color filter 739. The first photo-inductive transistor 721 has a first end electrically connected to the capacitor mi, a gate terminal for receiving the gate signal SGn+Ι, And electrically connected to the second end of the fourth photo-inductive transistor 723. The fourth photo-induced transistor 723 has a first end electrically connected to the second end of the first photo-sensing transistor 721, A gate terminal for receiving the gate signal 3 (^+1, And - a second end for receiving the first-common voltage Vcl. The first color filter 729 corresponding to the first photo transistor 721 and the fourth photo transistor 723 is used to filter out incident light components of the incident light signal that fall within the first wavelength range. The second photo-sensing transistor 731 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the closed-pole signal SGn+1, And electrically connected to the second end of the third photo-induced transistor 733. The second photo-induced transistor 733 has a first end electrically connected to the second end of the second photo-inductive transistor 731, - an electrical connection to the first end of the second photo-inductive transistor 731 18 201243814 gate terminal, And a second end for receiving the second common voltage Vc2. The second color filter corresponding to the second photo-induced transistor 731 and the third photo-inductive transistor 733 is used to filter out incident light components of the incident optical signal that fall within the second optical wavelength range. When the incident optical signal only contains background white correction, If the difference current Ipdif rises due to the photocurrent/bias characteristic curve shift, Then, the fourth photo-induced transistor 723 lowers the first photocurrent Iphl according to a smaller voltage drop. Further reducing the difference current Ipdif, Therefore, further compensation effects can be provided to make the optical sensing input operation more reliable. Fig. 11 is a view showing a liquid crystal display device having an optical sensing input mechanism according to an eighth embodiment of the present invention. As shown in Figure 11, The liquid crystal display 8 is similar to the liquid crystal display 100 shown in FIG. The main difference is that the complex optical inductive input device 11 is replaced by a complex optical inductive input device 810. And further comprising a plurality of third bias lines 8〇6, The optical inductive input device DAn_m is replaced by a photoinductive input device DHn_m. Each of the third bias lines 806 is for transmitting a third common voltage Vc3. The light sensing input device DHn-m is also similar to the light sensing input device DAn_m, The main difference is that the first light sensing unit 120 is replaced with the first light sensing unit 82A. The second light sensing unit 13A is replaced with the second light sensing unit 830. The first light sensing unit 820 includes a first light sensing transistor 821, The fourth photo-induced transistor 823 is coupled to the first color filter 829. The second light sensing unit 830 includes a second light sensing transistor 831, The third light-sensitive transistor crystal 3 and the second color filter 839. The first photo-induced transistor 821 has a first end electrically connected to the capacitor 141, a gate terminal for receiving the third common voltage Vc3, And electrically connected to the second end of the fourth photo-sensing transistor 823. The fourth photo-inductive transistor 823 has a first end electrically connected to the second end of the first photo-inductive transistor 821, a gate terminal for receiving the third common voltage Vc3 19 201243814, And a second end for receiving the first common voltage VC1. The first color filter 829 corresponding to the first photo-induced transistor 821 and the fourth photo-inductive transistor 823 is used to filter out the incident light component of the incident light §fU. The second photo-induced transistor 831 has a first end electrically connected to the capacitor 41, a gate terminal for receiving the third common voltage Vc3, And electrically connected to the first end of the third photo-induced transistor 833. The second photo-induced transistor 833 has a first end electrically connected to the second end of the second photo-inductive transistor 831, a gate terminal electrically connected to the first end of the second photo-induced transistor 831, And a second end for receiving the second common voltage Vc2. The second color filter 839 corresponding to the second photo-induced transistor 831 and the third photo-inductive transistor 833 is used to filter out incident light components of the incident optical signal that fall within the second optical wavelength range. The operation principle of the optical sensing input of the liquid crystal display 800 can be matched with the third optical sensing transistor 333 of FIG. 6 and the fourth optical sensing transistor 723 of the first drawing according to the optical sensing input operation principle of the liquid crystal display 200 of FIG. The effect of compensation and so on, No longer mentioned 0. In summary, In the operation of the liquid crystal display device with optical inductive input mechanism of the present invention, The compensation effect is offset by the photocurrent/bias characteristic curve of the first photo-induced transistor and the second photo-inductive transistor, The biasing range is only slightly reduced after a long period of bias/lighting operation. Therefore, a sufficiently large bias operating range can still be provided to avoid an input state misjudgment condition. In addition, By the operation of the first color filter and the second color filter, It provides high light sensitivity. that is, The optical sensing input operation system of the liquid crystal display of the present invention has both high reliability and high sensitivity. Although the invention has been disclosed above by way of example, However, it is not intended to limit the invention. Anyone having ordinary knowledge in the technical field to which the present invention pertains, Without departing from the essence of the present invention 201243814, the scope of protection of the present invention is considered to be a variety of changes and refinements. The scope defined in the appended patent application shall prevail. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a liquid crystal display having a light-sensing input mechanism according to a first embodiment of the present invention. Fig. 2 is a diagram showing the relationship between the difference current ipdif and the change in the bias voltage VgS when the liquid helium display shown in Fig. 1 operates. Figure 3 is a schematic diagram showing the waveforms of the operation related signals of the liquid crystal display shown in Fig. 1. The horizontal axis is the time axis. Fig. 4 is a schematic view showing a liquid crystal display with a light sensing input mechanism according to a second embodiment of the present invention. Figure 5 is a schematic diagram showing the waveforms of the operation related signals of the liquid crystal display shown in Fig. 4. The horizontal axis is the time axis. Fig. 6 is a view showing a liquid crystal display with a light sensing input mechanism according to a third embodiment of the present invention. Figure 7 is a schematic diagram of a liquid crystal display with a light sensing input mechanism according to a fourth embodiment of the present invention. Figure 8 is a schematic diagram of a liquid crystal display with a light sensing input mechanism according to a fifth embodiment of the present invention. Figure 9 is a schematic diagram of a liquid crystal display with a light sensing input mechanism according to a sixth embodiment of the present invention. 21 201243814 FIG. 1 is a schematic diagram of a liquid crystal display with a light sensing input mechanism according to a seventh embodiment of the present invention. Figure 11 is a schematic diagram of a light sensing input mechanism according to an eighth embodiment of the present invention. ·'’, π器【Main component symbol description】 LCD display gate line data line readout line first bias line second bias line light sensing input device first light sensing unit first light sensing transistor first color filter Two light induction Pingyuan 100, 200, 300, 400, 500, 600, 700, 800 101 102 103 104 105 110 120, 220, 420, 520, 620, 720, 820 121, 221, 421, 521, 621, 721, 821 129, 229, 429, 529, 629, 729, 829 130, 330, 430, 530, 630, 730, 830 22 201243814 131 > 331 ' 431 > 531 631, 731, 831 139, 339, 439, 539 639, 739, 839 140 141 150 151 180 190 206, 406, 606, 806 333, 433, 533, 633 733, 833 523, 623, 723, 823 BXn+1 BYn+1 BZn+1 CASJ, CAS_2, CBS_1 > CBS_2 DAn-m, DBn m, DCn m, DDn_m, DEn m, DFn m, Second photo-inductive transistor second color filter energy storage unit capacitor readout unit transistor signal processing unit halogen unit third bias line third light-sensing transistor fourth light-sensing transistor first bias line Two bias line third bias line relationship curve light sensing input device 23 201243814 DGn-m, DHn m, GLn, GLn+1 gate line Ipdif difference current Iphl first photo current Iph2 second photo current Ith critical current RLm readout line SGn ' SGn+1 gate signal Sro_m read signal Tal, Ta2 Ta3, Tbl, Time period Tb2 Tb3 Va induction power Vcl first common voltage Vc2 second common voltage Vc3 third common voltage Vgs, Vgsl, Vgs2 Bias voltage Vgs3, Vgs4 Vout Output Voltage Vst Starting Voltage 24