HD-2006-0014-T\V 19654iwf.doc/0〇6 九、發明說明： 【發明所屬之技術領域】 本發明是關於-種液晶顯示器及其畫素驅動方法，且 特別是有關於-種具有單晶魏晶顯示面板(liquid crystd on silicon，LCoS)的液晶顯示器及其晝素驅動方法，能有效 加快液晶顯示器之晝素液晶反應速度及提升液晶顯示器之 顯示品質。 【先前技術】 液晶顯示斋(Liquid Crystal Display, LCD)近來已被廣泛地 使用，並取代陰極射線管顯示器(CRT)成為下一代顯示器的主 流之一。隨著半導體技術的改良，使得液晶顯示器具有低的消 耗電功率、薄型量輕、解析度高、色彩飽和度高、壽命長等優 點，因而廣泛地應用在電腦的液晶螢幕及液晶電視(LCD τν) 等與生活息息相關之電子產品上。其中，液晶面板(Liquid Crystal Panel)更是液晶顯示器品質良宥之關鍵所在。 液晶面板係由彩色濾光基板、主動元件陣列基板所構 成，而此兩基板間則填有液晶分子層。此液晶分子具有雙折 射係數（Birefringence)的特性，在不同的電場下，會有不同 的排列方式。因此，液晶顯示器即是藉由外加電場(電壓)來使 液晶面板中的液晶分子轉向，進而改變液晶面板上各個像素 的透光率，以達到顯像的目的。 然而，液晶分子的回應時間較慢，通常在施加預定驅動電 壓（data voltage)時’液晶分子無法在預定時間之内達到此驅動 電壓所對應的旋轉角度。因此，當以液晶顯示器快速播放動畫 HD-2006-0014-T\V 19654twf.doc/006 時，便會有殘影的現象出現。亦即，影像資料傳送給LCD顯 示器的速度比LCD顯示器的反應時間還快，而使得LCD顯示 器中液晶的反應無法跟上。 圖1繪示為習知液晶顯示器的操作順序示意圖。請參照 圖1 ’液晶顯示器顯示一張晝面(frame)的工作時間係被等分 成3個子晝面(sub-frame)區段，其包括紅場（R)子晝面區 段、綠場（G)子晝面區段，以及藍場（b)子晝面區段。 其中，上述每一子晝面區段更被切割成3個片段，其包含 每個晝素的資料定址（data addressing)、液晶反應（LC response)，以及光顯示（light 〇n)。 一般而言，於R子晝面區段中，必需先對R晝素的資 料做定址，接著再等待R液晶反應後，才會顯示出R光。 同樣地，於G或B區段中’必需先對G或B晝素的資料HD-2006-0014-T\V 19654iwf.doc/0〇6 IX. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal display and a pixel driving method thereof, and particularly related to A liquid crystal display having a single crystal silicon crystal display panel (LCoS) and a halogen driving method thereof can effectively accelerate the reaction speed of the liquid crystal display of the liquid crystal display and improve the display quality of the liquid crystal display. [Prior Art] Liquid Crystal Display (LCD) has recently been widely used and replaced the cathode ray tube display (CRT) as one of the main streams of the next generation display. With the improvement of semiconductor technology, the liquid crystal display has the advantages of low power consumption, light weight, high resolution, high color saturation and long life, so it is widely used in computer LCD screens and LCD TVs (LCD τν). Waiting for the electronic products that are closely related to life. Among them, the liquid crystal panel (Liquid Crystal Panel) is the key to the quality of the liquid crystal display. The liquid crystal panel is composed of a color filter substrate and an active device array substrate, and a liquid crystal molecule layer is filled between the two substrates. This liquid crystal molecule has a birefringence characteristic and has a different arrangement under different electric fields. Therefore, the liquid crystal display turns the liquid crystal molecules in the liquid crystal panel by an applied electric field (voltage), thereby changing the light transmittance of each pixel on the liquid crystal panel to achieve the purpose of development. However, the response time of the liquid crystal molecules is slow, and the liquid crystal molecules cannot reach the rotation angle corresponding to the driving voltage within a predetermined time usually when a predetermined data voltage is applied. Therefore, when the animation HD-2006-0014-T\V 19654twf.doc/006 is quickly played back on the liquid crystal display, there is a phenomenon of afterimage. That is, the speed at which the image data is transmitted to the LCD display is faster than the response time of the LCD display, so that the reaction of the liquid crystal in the LCD display cannot be kept up. FIG. 1 is a schematic diagram showing the operation sequence of a conventional liquid crystal display. Please refer to FIG. 1 'The liquid crystal display displays a working time of a frame which is equally divided into three sub-frame segments, including a red field (R) sub-surface segment and a green field ( G) sub-sections, and blue-field (b) sub-sections. Wherein each of the sub-surface segments is further cut into three segments, which include data addressing, LC response, and light 〇n for each pixel. In general, in the R sub-section, it is necessary to address the data of the R element, and then wait for the R liquid crystal reaction to display the R light. Similarly, in the G or B segment, the data for G or B must be used first.
做定址’並等待G或B液晶反應，才會顯示出G光或B 光。 然而，當液晶顯示器解析度提升時，其晝面更新率 (frame rate)也必需隨之提升，此時就會造成上述資料定址 速度及液晶轉態速度不足的情形。為了要改善此問題，習 知之做法係在液晶顯示器的畫素内加入圖框緩衝器（frame buffer) ’藉由在某一顏色子畫面之液晶反應和光顯示期 間’同時執行另一種顏色子晝面的資料定址動作，因此， 在前一個顏色子晝面顯示後，即可立即顯示下一個顏色子 晝面’如此即可省卻資料定址的時間花費，而解決資料定 址速度不足的問題。 1352952 HD-2006-0014-TW 19654twf.doc/006 圖2繪示為在習知液晶顯示器的操作順序示意圖。請 f時參照圖1及圖2,在液晶顯示器的晝素内加人^框緩衝 器後’液晶顯示器晝素的資料定址時間可增加至一完整的 子畫面時間，而原來的子晝面則僅需切割成液晶反應=光 顯不2個片段。藉此即可彌補晝素之資料定址速度不足的 缺點，進而改善液晶顯示器之顯示品質。 此外，在液晶顯示H的操作過程巾，除了稍地將資料 線和晝素電極由負極性充電至正極性，再由正雛放電至負極 性外’目前的作法還包括利用圖框與列轉換交接的空白時間， =預先充電的方式，提早進行充放電的動作，以爭取時間將電 =至：需的驅罐。然而，為了達到理想的預先充電效 必得改變其驅動電路的設言十，增加許多電路元件，因此 f需要提供—觀_效提聽晶反應速度，且兼顧成本考量 的驅動電路設計。 【發明内容】 1鑑於此，本發明的目的就是提供一種液晶顯示器及 、驅動方法’藉由在資料驅動器與晝素電路間加入多 一:並於畫素電路中加入至少二個緩衝儲存器以在每 &液晶單元轉換接收驅動電壓前，對液晶單元進行預先 勺紅及其他目的’本發明所提供的液晶顯示器’ ^全固貧料驅動器、複數條資料、線、複數個多工器，以 每二夕工！?:其中，每一資料驅動器係提供一驅動電壓，而 夕工益係耦接至一預充電壓及對應的資料驅動器，用以選 7 1352952 HD-20〇6-〇〇i4-TW 19654twfdoc/006 擇性輸出此預充電壓或資料驅動ϋ所提供的驅動電壓至對應 的資料線4素陣列包含複數個晝素電路，其分別紐至^ 的資料線’酶-畫素電路包含至少二個緩^液晶^ 疋。其中，上述二個緩衝儲存器係輕接至對應的資料線，用以 選擇性接收上述預充電壓或資料驅動器所提供的驅動電壓。液 晶單元包含晝素電極、制電極⑽夾於畫錢極與共同電極Doing the address ' and waiting for the G or B liquid crystal to react will show G light or B light. However, when the resolution of the liquid crystal display is increased, the frame rate of the face must be increased, which may cause the above-mentioned data addressing speed and the liquid crystal transition speed to be insufficient. In order to improve this problem, the conventional method is to add a frame buffer to the pixels of the liquid crystal display 'by performing liquid color reaction and light display during a color sub-picture simultaneously while performing another color sub-surface The data addressing action, therefore, after the previous color sub-surface display, the next color sub-surface can be displayed immediately. This can save the time cost of data addressing and solve the problem of insufficient data addressing speed. 1352952 HD-2006-0014-TW 19654twf.doc/006 FIG. 2 is a schematic diagram showing the operation sequence of a conventional liquid crystal display. Please refer to FIG. 1 and FIG. 2, and after adding the buffer to the liquid crystal display, the data address time of the liquid crystal display can be increased to a complete sub-picture time, and the original sub-surface is Only need to cut into liquid crystal reaction = light shows no two fragments. In this way, it is possible to make up for the shortcomings of the insufficient address speed of the data, thereby improving the display quality of the liquid crystal display. In addition, in the operation process of the liquid crystal display H, in addition to slightly charging the data line and the halogen electrode from the negative polarity to the positive polarity, and then discharging from the positive to the negative polarity, the current practice also includes the use of frame and column conversion. The blank time of the handover, = the way of pre-charging, the action of charging and discharging early, in order to gain time to power = to: need to drive the tank. However, in order to achieve the desired pre-charging effect, it is necessary to change the design of the driving circuit and add many circuit components. Therefore, f needs to provide a driving circuit design that takes into consideration the cost of the crystal response and takes into account cost considerations. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a liquid crystal display and a driving method 'by adding one more between the data driver and the pixel circuit: and adding at least two buffer memories to the pixel circuit to Before each & liquid crystal cell converts the receiving driving voltage, the liquid crystal cell is pre-spoiled and other purposes. The liquid crystal display provided by the present invention is a full-solid material driver, a plurality of data, a line, and a plurality of multiplexers. Every two days! ?: Among them, each data driver provides a driving voltage, and Xiyiyi is coupled to a pre-charge voltage and corresponding data driver for selecting 7 1352952 HD-20〇6-〇〇i4-TW 19654twfdoc/ 006 Selectively output the driving voltage provided by the pre-charge voltage or data driving device to the corresponding data line. The 4-cell array includes a plurality of pixel circuits respectively, and the data line 'enzyme-pixel circuit respectively corresponding to ^ includes at least two Slow ^ LCD ^ 疋. The two buffer storages are lightly connected to the corresponding data lines for selectively receiving the driving voltage provided by the pre-charge voltage or data driver. The liquid crystal unit comprises a halogen electrode, and the electrode (10) is sandwiched between the drawing pole and the common electrode
^間的液晶分子層，其中晝素電極選擇蝴接至對應的緩衝儲 存器。 依照本發明較佳實施例所述的液晶顯示器，每一個晝 素電路更包括第-關、第m關，以及第= 其巾’第—開關祕於對應的資料線麟應的緩衝 =子器之間’ *第—開關則_接於對應的緩衝儲存器與對 應的晝素電極之間，第三開關_接於對應的資料線斑對應 =緩衝儲郎之間’而第四開關_接於對應賴衝儲存 器與對應的晝素電極之間。The liquid crystal molecular layer between the two, wherein the halogen electrode is selectively connected to the corresponding buffer memory. According to the liquid crystal display of the preferred embodiment of the present invention, each of the pixel circuits further includes a first-off, a m-th turn, and a second switch; the first switch has a buffer of the corresponding data line. The '*th-switch _ is connected between the corresponding buffer memory and the corresponding halogen electrode, and the third switch_ is connected to the corresponding data line spot corresponding to the buffer between the buffers and the fourth switch_ Between the corresponding reliance reservoir and the corresponding halogen electrode.
從另-觀點來看，本發明提供一種晝素驅動方法，其 ^用於上述本發明的液晶顯示器，且上述至少二個緩衝儲 p中包括第-與第二緩衝儲郎，域晝素驅動方法包 括下列步驟：在第-階段時1啟第—開關及第四開關， ^閉第二開關及第三開關，並控制對應的多卫器輸出驅 動電壓至資料線’以將驅動電_存於第—緩衝儲存器， 同時由第二緩衝儲存器輸出電壓至液晶單元。在第二階段 時’開啟第三開關及第四開關，而關閉第—開關及第二開 8 1352952 HD-2006-0014-TW 19654twf.doc/0〇6 麟，多工器輸出預充電壓至㈣線，以對液 日日早兀進行預先充電。 依照本發明較佳實施例所述的畫素驅動方法， 下列步驟：在第三階段時，開啟第 關閉第:開關及第四開關，並控制對應的多=驅： 3d:將驅峨儲存於第二緩衝儲存器，同 =由第-緩衝儲存器輸出電壓至液晶單心在第四階段 關’ 丨一開關及第二開關’而關閉第三開關及第四開 曰單元的多工器輸出預充電壓至資料線，以對液 曰曰早7L進行預先充電。 ^另-觀點來看，本發明提供一種液晶顯示器，包 電路、資料線、資料驅動器，以及多工器。其中， ΐ電路路2至少二個緩衝儲存器’而資料線則耦接至晝 。電路。貞料驅動⑽提供驅動電壓 用以選擇性輸出此預= 斗驅動益所提供的驅動電壓至資料線。 -摘=本發魏蹄_職的液晶，上述至少 =儲存器包括第一與第二緩衝儲存器， 3括;—=第二開關'第三開關，以及第-二 第hL 接於資料線與第一緩衝储存器之間，而 接於資料線與第二緩衝儲存器之間 麵接於第二緩_存器與4素電極之間；3 μ四開關則 9 ^-2006-0014.1^ 19654twf.doc/O06 +本l明所k供的液晶顯示器及其晝素驅動方法，藉由 在資料驅動器與晝素電路間加人多工器，並於晝素電ς中 =入至少二個緩衝儲存n，以便於在每―缝晶單元轉換 接收驅動電壓前(亦即在每兩個畫面之間），由多工器依據 切換訊號輸㈣充龍或驅動電壓至晝素電路以使畫素 電路對液晶單元進行職充電，而不必在晝素電路中增加 額外的電路元件’即可有效地加紐晶反應速度，提升液 晶顯示器之顯示品質。 *為讓本發明之上述和其他目的、特徵和優點能更明顯 易懂，下文特舉本發明之較佳實施例，並配合所附圖式， 作詳細說明如下。 【實施方式】 圖3疋依照本發明較佳實施例所纟會示的液晶顯示器電 路圖。請參照圖3，液晶顯示器300(例如為單晶矽液晶顯 示器，liquid crystal on silicon display)包括複數個資料驅動 器301、複數個多工器303、複數個閘極驅動器3〇5，以及 晝素陣列307。於本實施例中，資料驅動器3〇1係提供驅 動電壓Vd，而每一個多工器303則對應耦接於一個資料驅 動為301與一條資料線dl，並接收驅動電壓vd、預充電 壓Vrst及切換訊號SW。其中，多工器3〇3係依據切換訊 號sw，而選擇性的輸出預充電壓Vrst或驅動電壓vd至 對應的資料線DL。 閘極驅動器（gate driver) 305係提供掃描訊號(scan signal) ’並且透過複數條掃描線SL1與SL2而將掃描訊號 1352952 HD-20〇6-〇〇 14-TW 19654twf.doc/006 傳輸至畫素陣列307内的畫素電路3〇7a。圖4繪示為本實 施例之晝素電路307a的電路圖。請合併參照圖3及圖4， 晝素電路307a包括二個緩衝儲存器C1與C2、液晶單元 LC，以及開關sp、Dp、SN與DN。其中，緩衝儲存器〇 與C2係用以選擇性的接收預充電壓Vrst或驅動電壓Vd， 且緩衝儲存器Cl與C2係例如包括電容器(capacit〇r)，但From another point of view, the present invention provides a halogen driving method, which is used in the liquid crystal display of the present invention, and the at least two buffers p include the first and second buffers, and the domain element drive The method comprises the following steps: in the first stage, the first switch and the fourth switch are turned on, the second switch and the third switch are closed, and the corresponding multi-guard output driving voltage is controlled to the data line 'to drive the power_ In the first buffer memory, the voltage is output from the second buffer memory to the liquid crystal cell. In the second stage, 'turn on the third switch and the fourth switch, and turn off the first switch and the second open 8 1352952 HD-2006-0014-TW 19654twf.doc/0〇6 Lin, the multiplexer output pre-charge is pressed to (4) Line, pre-charging the liquid on the morning and evening. According to the pixel driving method of the preferred embodiment of the present invention, in the third stage, the first closing switch and the fourth switch are turned on, and the corresponding multi-drive is controlled: 3d: the drive is stored in The second buffer memory is the same as the multiplexer output of the third switch and the fourth open unit by the output voltage of the first buffer memory to the single center of the liquid crystal in the fourth stage, the first switch and the second switch are turned off. The pre-charge is pressed to the data line to pre-charge the liquid raft 7L early. ^ Another - point of view, the present invention provides a liquid crystal display, a package circuit, a data line, a data driver, and a multiplexer. Wherein, the circuit circuit 2 has at least two buffer memories ‘ and the data lines are coupled to 昼. Circuit. The feed drive (10) provides a drive voltage for selectively outputting the drive voltage provided by this pre-driver drive to the data line. -Extracted = this is the Weihu _ job LCD, the above at least = the storage includes the first and second buffer storage, 3;; = the second switch 'the third switch, and the second - second hL connected to the data line Between the first buffer and the second buffer, the data line and the second buffer are connected between the second buffer and the 4-cell electrode; and the 3 μ4 switch is 9^-2006-0014.1^ 19654twf.doc/O06 + The liquid crystal display and its elementary driving method provided by the present invention, by adding a multiplexer between the data driver and the pixel circuit, and entering at least two in the halogen battery Buffer storage n, so that before each "seed unit" converts the receiving driving voltage (that is, between every two screens), the multiplexer inputs (4) the charging or driving voltage to the pixel circuit according to the switching signal to make the picture The prime circuit charges the liquid crystal cell without adding additional circuit components to the pixel circuit, which can effectively increase the reaction speed of the crystal and improve the display quality of the liquid crystal display. The above and other objects, features and advantages of the present invention will become more fully understood from [Embodiment] FIG. 3 is a circuit diagram of a liquid crystal display according to a preferred embodiment of the present invention. Referring to FIG. 3, the liquid crystal display 300 (for example, a liquid crystal on silicon display) includes a plurality of data drivers 301, a plurality of multiplexers 303, a plurality of gate drivers 3〇5, and a pixel array. 307. In the embodiment, the data driver 3〇1 provides the driving voltage Vd, and each multiplexer 303 is coupled to a data driving device 301 and a data line dl, and receives the driving voltage vd and the pre-charging voltage Vrst. And switching signal SW. The multiplexer 3〇3 selectively outputs the precharge voltage Vrst or the driving voltage vd to the corresponding data line DL according to the switching signal sw. The gate driver 305 provides a scan signal 'and transmits the scan signal 1352952 HD-20〇6-〇〇14-TW 19654twf.doc/006 to the picture through a plurality of scan lines SL1 and SL2. The pixel circuit 3〇7a in the pixel array 307. Fig. 4 is a circuit diagram of the pixel circuit 307a of the present embodiment. Referring to FIG. 3 and FIG. 4 together, the pixel circuit 307a includes two buffer memories C1 and C2, a liquid crystal cell LC, and switches sp, Dp, SN and DN. Wherein, the buffer memory 〇 and C2 are used to selectively receive the precharge voltage Vrst or the driving voltage Vd, and the buffer memories C1 and C2 include, for example, a capacitor (capacit〇r), but
在此並不限定其範圍，使用者當可視實際需要，採用其他 不同種類的儲存元件。 此外，於本實施例之晝素電路3〇7a中，係以二個緩衝 儲存器C1與C2做為圖框緩衝器(framebuffer)，以增加畫 素，路307a的資料定址(dataaddressing)時間，但在此並不 限定其個數，使用者當可視實際需要，採用二個以上的緩 衝儲存器。The scope is not limited herein, and the user may use other different types of storage elements as needed. In addition, in the pixel circuit 3〇7a of the embodiment, two buffer memories C1 and C2 are used as frame buffers to increase the pixel and data addressing time of the path 307a. However, the number is not limited herein, and the user may use more than two buffer storages as needed.
液晶單元LC包括晝素電極(pixeldectr〇de，未繪示）、 =電極(common dectrode ’未繪示），以及夾於晝素電極 t共用電極之間的液晶分子層⑽啊，未繪示）。其中， 里素電極會選擇性_接至緩_存|| C1與C2 1中之 :。開關sp餘接於資料線DL與緩衝儲存器ci 而開關DP _接於緩衝儲翻α與晝素電極之間；此 ’開關SN·於貧料線DL與緩衝儲存器c2之間，而 相DN則爐於緩衝贿器C2與晝素電極之間。 t本實施财’開關讲與汹係分別受控 控制線⑴與CU，DnN係分別受控於對應的 且開關SP、DP、SN與DN係採用金 1352952 HD-2006-0014-TVV 19654iwf.doc/006 屬氧化半導體電晶體(MOS transistor)，但在此並不限定立 範圍’使用者當可視實際需要’採用其他不__開關。 而為了要更清楚的說明上述實施例之液晶顯示器3〇〇 之功效’町將舉出一種畫素驅動方法，配合上述實施例 所述之液晶顯示器3〇〇的電路結構，並以單一資料驅動器 301、多工器303、閘極驅動器305，以及畫素電路3〇7a 為例，且分為四個階段來敘述液晶顯示器3〇〇之晝素電路 =7=的運傾程’而本發明領域具有通常知識者可依據本 貫知例之教示，而類推到液晶顯示器3⑻之畫素陣列go? 中各個晝素電路的運作流程。 圖5繪示為本實施例之液晶顯示器電路圖。圖6為依 照本發明之一較佳實施例所繪示的畫素驅動方法流程圖。 圖=7B、7C、7D分別為依照本發明較佳實施例所緣示 =晝素驅動方法第一階段、第二階段、第三階段及第四階 丰又的晝素電路307a操作示意圖。 請先合併參照圖5、圖6及圖7A，如步驟S6〇1所述， 階段中，閘極驅動器305會提供掃描訊號，並透過 /帚描線SL1與SL2以開啟開關SP與(亦即圖7A中標 者）’而關閉開關SN與DP(亦即標示為X者），且此 工器303會依據所接收的切換訊號sw，選擇將驅動 儲壓：d輸出至資料線DL，並將驅動電壓Vd儲存於緩衝 \存态C1 ’在此同時，緩衝儲存器C2會將儲存於其中的 驅動電壓Vd輸出至液晶單元lc。 ’ 接著’凊合併參照圖5、圖6及圖7B，於步驟S602 12 HD-2006-0014-TW 19654twf.doc/006 所述’在第二階段中’閘極驅動器305會提供掃描訊號， 並透過掃描線SL1與SL2開啟開關SN與DN(亦即圖7B 中標示為〇者）’而關閉開關SP與DP(亦即標示為X者）。 此時多工器303會依據所接收的切換訊號sw，輸出預充 電壓Vrst至資料線DL，並依循圖7B箭號路徑以對液晶單 元LC進行預先充電。 之後，請合併參照圖5、圖6及圖7C，於步驟S603 所述，在第三階段中，閘極驅動器305會提供掃描訊號， 並透過知描線SL1與SL2以開啟開關sn與DP(亦即圖7C 中標示為〇者），而關閉開關SP與DN(亦即標示為乂者）。 此時多工器303即會依據所接收的切換訊號sw，輸出驅 動電壓Vd至資料線DL，並將驅動電壓Vd儲存於緩衝儲 存器C2。 在此同時，緩衝儲存器C1已於步驟3601儲存了驅動 電壓Vd，故在開㈣DP開啟時，會將其所儲存的驅動電壓 Vd輸出至液晶單元LC，且液晶單元Lc已於步驟_2進 订了預先充電’於是液晶單元LC之晝素電極可快速提升 至緩衝儲存器C1所儲存的驅動電壓Vd，所以加快了液晶 單元LC的反應速度。 、 最後，請合併參照® 5、圖6及圖7D，於步驟腿 所述，在第四階段巾，閘極驅動器3〇5會提供掃描訊號， 並透過掃描線SL1與su以開關sp與Dp(亦即圖7〇 中標示為〇者），而關閉開關SN與DN(亦即標示為X者 且此時多工器303會依據所接收的切換訊號::輸出預 1352952 HD-2006-0014-TVV 19654twf.doc/006 充電壓vrst至資料線DL，並依循圖7D箭號路徑對液晶單 元LC進行預先充電。 上述貫施例雖將畫素驅動方法係分成四個階段來說 明，但不限定各個步驟S601〜S604的順序。舉例來說本 實施例之畫素驅動方法亦可從步驟S6〇3開始，且循序的 再執行步驟S604—S601—S602，然後再回到步驟S6〇3。 而於本實施例中，此畫素驅動方法係會依序循環步驟 S601〜S604,以使畫素電路307a於每二個畫面時間之間， 對液晶單元LC進行預先充電，而加錄晶單元LC的液 晶反應速度(亦即加快液晶轉態速度）。藉此，以更為提升 液晶顯示器300的顯示品質。 综上所述，本發明是提供一種液晶顯示器及其畫素驅 動方法。而依據上述實施例所述，本發少 點： 1.藉由在資料驅動器與晝素電路間加入多工器，並選 擇性地輸出預充電壓或驅動電壓至晝素電路，而不必在每 ，畫素電路t增加額外的電路元件來控侧充電壓就能 ，達到贱充電、加快反應速度的效果’可大幅減少電路 成本。 驟，存器可交互執行資料定址及輸出的步 驟而增加晝素電路的資料定址時間。 3·在液晶齡11解析度提升，而其晝面更新率(frame ΓΓ)也隨之提升的同時，在每兩個畫面之晴液晶單元進 亍預先充1： Τ加快液晶單元之液晶反應速度提升液晶 14 1352952 HD-2006-0014-TW 19654twf.doc/006 顯示器的顯示品質。 雖然本發明已以較佳實施例揭露如上’然其並非用以 限定本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍内，當可作些許之更動與潤飾，因此本發明之保護 範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 圖1、圖2繪示為習知液晶顯示器的操作順序示意圖。 圖3是依照本發明較佳實施例所繪示的液晶顯器電 路圖。 圖4繪不為本實施例之畫素電路的電路圖。 圖5繪不為本實施例之液晶顯示器電路圖。 圖6。為依照本發明之一較佳實施例所繪示的晝素驅動 万法流程圖。 絡-图7B 7C、7D分別為依照本發明較佳實施例所 ”Ϊ旦Ϊ驅動方法第—階段、第二階段、第三階段及第 四I5自段的晝素電路操作示意圖。 【主要元件符號說明】 300 :液晶顯示器 301 303 305 307 資料驅動器 多工器 閘極驅動器 晝素陣列 307a :畫素電路 SP、DP、SN、DN : P# 關 15 1352952 HD-2006-0014-T\V 19654t^f.doc/006 a、C2:緩衝儲存器 LC :液晶單元 S601〜S604 :本發明較佳實施例所繪示之晝素驅動方 法流程圖的各步驟The liquid crystal cell LC includes a pixel electrode (not shown), a = electrode (common dectrode 'not shown), and a liquid crystal molecular layer (10) sandwiched between the electrodes of the halogen electrode t, not shown. . Among them, the lysine electrode will be selectively _ connected to the buffer _ memory | | C1 and C2 1 :. The switch sp is connected between the data line DL and the buffer memory ci, and the switch DP_ is connected between the buffered storage α and the halogen element; the 'switch SN· is between the lean line DL and the buffer memory c2, and the phase The DN is between the buffer C2 and the halogen electrode. t The implementation of the 'switch' and the 汹 system respectively controlled control line (1) and CU, DnN are controlled respectively, and the switches SP, DP, SN and DN are gold 1352952 HD-2006-0014-TVV 19654iwf.doc /006 is an oxidized semiconductor transistor (MOS transistor), but here is not limited to the vertical range 'users can see the actual needs' using other non-_ switches. In order to more clearly explain the effect of the liquid crystal display device of the above embodiment, a pixel driving method will be described, in conjunction with the circuit structure of the liquid crystal display device of the above embodiment, and a single data driver is used. 301, multiplexer 303, gate driver 305, and pixel circuit 3 〇 7a as an example, and is divided into four stages to describe the liquid crystal display 3 昼 昼 = ================ The field of general knowledge can be based on the teachings of the present example, and analogous to the operation of each pixel circuit in the pixel array 3 of the liquid crystal display 3 (8). FIG. 5 is a circuit diagram of the liquid crystal display of the embodiment. FIG. 6 is a flow chart of a pixel driving method according to a preferred embodiment of the present invention. Figures 7B, 7C, and 7D are schematic diagrams showing the operation of the first stage, the second stage, the third stage, and the fourth stage of the pixel circuit 307a according to the preferred embodiment of the present invention. Referring to FIG. 5, FIG. 6 and FIG. 7A together, as described in step S6〇1, in the stage, the gate driver 305 provides a scan signal and transmits/scans the lines SL1 and SL2 to turn on the switch SP and (ie, The 7A winning bidder)' turns off the switches SN and DP (also denoted as X), and the worker 303 selects to drive the storage pressure: d to the data line DL according to the received switching signal sw, and drives The voltage Vd is stored in the buffer/storage state C1'. At the same time, the buffer memory C2 outputs the driving voltage Vd stored therein to the liquid crystal cell lc. Referring to FIG. 5, FIG. 6 and FIG. 7B, in step S602 12 HD-2006-0014-TW 19654 twf.doc/006, in the second stage, the gate driver 305 provides a scan signal, and The switches SP and DP (i.e., labeled X) are turned off by turning on the switches SN and DN (i.e., as indicated in Figure 7B) through the scan lines SL1 and SL2. At this time, the multiplexer 303 outputs the precharge voltage Vrst to the data line DL according to the received switching signal sw, and follows the arrow path of FIG. 7B to precharge the liquid crystal cell LC. After that, referring to FIG. 5, FIG. 6 and FIG. 7C, in step S603, in the third stage, the gate driver 305 provides a scan signal, and through the lines SL1 and SL2, the switches sn and DP are turned on (also That is, the flag is shown in Figure 7C, and the switches SP and DN are turned off (also indicated as the latter). At this time, the multiplexer 303 outputs the driving voltage Vd to the data line DL according to the received switching signal sw, and stores the driving voltage Vd in the buffer memory C2. At the same time, the buffer memory C1 has stored the driving voltage Vd in step 3601. Therefore, when the (four) DP is turned on, the stored driving voltage Vd is output to the liquid crystal cell LC, and the liquid crystal cell Lc has been entered in step _2. The pre-charging is ordered, so that the halogen electrode of the liquid crystal cell LC can be quickly raised to the driving voltage Vd stored in the buffer memory C1, so that the reaction speed of the liquid crystal cell LC is accelerated. Finally, please refer to the reference 5, 6 and 7D. In the step of the step, in the fourth stage, the gate driver 3〇5 will provide the scanning signal and pass the scanning lines SL1 and su to switch sp and Dp. (that is, the one shown in Figure 7〇), and the switch SN and DN are turned off (that is, marked as X and the multiplexer 303 will be based on the received switching signal:: output pre-1352952 HD-2006-0014 -TVV 19654twf.doc/006 Charge voltage vrst to data line DL, and pre-charge the liquid crystal cell LC according to the path of Figure 7D arrow. The above example illustrates the pixel driving method in four stages, but not The sequence of the steps S601 to S604 is defined. For example, the pixel driving method of the embodiment may start from step S6〇3, and steps S604-S601-S602 are performed in sequence, and then return to step S6〇3. In this embodiment, the pixel driving method sequentially cycles through steps S601 to S604 to cause the pixel circuit 307a to precharge the liquid crystal cell LC between every two screen times, and add the crystal unit. LC liquid crystal reaction speed (that is, speed up the liquid crystal transition speed). Therefore, in order to improve the display quality of the liquid crystal display 300. In summary, the present invention provides a liquid crystal display and a pixel driving method thereof, and according to the above embodiments, the present invention has fewer points: 1. A multiplexer is added between the data driver and the pixel circuit, and the precharge voltage or the driving voltage is selectively outputted to the pixel circuit, and it is not necessary to add an additional circuit component to the pixel circuit to control the side charging voltage. The effect of 贱 charging and accelerating the reaction speed can greatly reduce the circuit cost. The memory can interactively perform the data addressing and output steps to increase the data addressing time of the morphemic circuit. The face update rate (frame ΓΓ) is also increased. At the same time, the liquid crystal unit of each two screens is pre-charged 1: Τ speed up the liquid crystal reaction speed of the liquid crystal unit to raise the liquid crystal 14 1352952 HD-2006-0014-TW 19654 twf.doc/006 Display quality of the display. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and anyone skilled in the art can In the spirit and scope of the invention, the scope of protection of the present invention is subject to the definition of the scope of the appended patent application. [Figure Illustrated] Figure 1 and Figure 2 show FIG. 3 is a circuit diagram of a liquid crystal display according to a preferred embodiment of the present invention. FIG. 4 is a circuit diagram of a pixel circuit not shown in the embodiment. FIG. Figure 6 is a flow chart of a pixel drive method according to a preferred embodiment of the present invention. Figure 7B 7C, 7D are respectively according to a preferred embodiment of the present invention. Schematic diagram of the operation of the pixel circuit in the first stage, the second stage, the third stage and the fourth stage I5. [Main component symbol description] 300: Liquid crystal display 301 303 305 307 Data driver multiplexer gate driver pixel array 307a: pixel circuit SP, DP, SN, DN: P# Off 15 1352952 HD-2006-0014-T \V 19654t^f.doc/006 a, C2: buffer memory LC: liquid crystal cells S601~S604: steps of the flow chart of the pixel driving method shown in the preferred embodiment of the present invention
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