200839702 九、發明說明： 【發明所屬之技術領域】 本發明係關於-種減不器之多圖框極性反轉過激驅動 方法’尤指-祕圖框速率輪人提升且使同—圖框内之各 電壓控制期間之電壓同極性之顯示器之多圖框極性反轉二 激驅動方法。 【先前技術】 # 由於科技的進步與更新，使得顯示器不_向# 小、重量輕之目標前進，尤其是液晶顯示器具有低耗電、貝 重量輕薄、無輻射及不閃爍等優點，可應用於數位電視、 筆記型電腦或電腦瑩幕’因而漸漸成為顯示器產業之主 流2而受限於液晶分子的特性，如點滞係數、彈性係數 及”電係數等等，故顯示器存在著其限制及缺點。 • 通常當晝面顯示速度超過每秒25個圖框(f_e•人 眼會將所看到的晝面視為連續動作，而目前影像之顯示速 度常在每秒6(Μ關框以上，以滿足動作片、遊戲或高品質 DVD衫片之需求。液晶面板之亮度呈現係、將電|施予液晶 盒(卿使液晶分子旋轉，以控制背光模組之光線透過之比 例，由於以電廢驅動液晶分子反應需要響應時間（Response time) ’將提高驅動電塵且無須改變顯示器面板結構以縮短 液晶顯示器響應時間的技術之—為，，過激驅 200839702 動’’(Overdrive，OD)技術。 以第8圖為例，若顯示器面板於圖框n及圖框Ν+ι /、a 呈現之亮度係為標的碼(Target code)，其對應之電壓微化士 標號61之曲線所示，藉由過激驅動技術，於圖枢n护輸 入過激驅動灰階碼(OD code)代替標的碼，則與過激驅動灰 階碼相對應之電壓變化如標號62所示，藉此快逮達到面板 所欲呈現之亮度；進入圖框N+1後，隨即以標的碼所對應 • 之電壓驅動液晶面板，以達到所需之亮度。其中，當顯示 電極的電壓尚於液晶面板之基準（Common)電壓Vcom時 就稱之為正極性，反之稱為負極性，若是採用c〇mm〇n電 壓交流驅動，將此產生正負極性電壓交替之情形，稱之為 極性反轉（polarity inversion) 〇 傳統極性反轉方法有四種，分別為如第9A圖所示之 frame inVerSi〇n(面反轉），從圖框N轉換成圖框N+1時，整 # 個面的區域内電極性將如圖所示從正極性變成負極性，其 極性的改變係以面為單位；第9B圖所示之c〇lumn inversion(行反轉）則其極性的改變係以行為單位；第9C圖 所示之Row inVerSi〇n(列反轉），其極性的改變係以列為單 位；而第9D圖所示之Dotinversion(點反轉），其極性的改 變係以點為單位。 液晶顯不器領域之業者為了滿足更高階快速影像處理 200839702 之需求’遂推出1¾圖框速率（High frame rate)之顯示器面 板，亦即更改液晶面板之架構使圖框更新速度加快，甚至 , 加倍，例如原本為60Hz的frame rate提升為70Hz，80Hz， 胃 甚至是120Hz的frame rate，其電壓及灰階碼（c〇de)變化圖 形如第10圖所示，其中，原本圖框速率60Hz的電壓變化 應洛於標5虎81，81之虛線範圍内，以加倍之12〇Hz進行電 壓驅動後，電容充放電及維持的時間將縮減一半，亦即原 _ 本之第一圖框期間82被區分為圖框期間n及圖框期間 Ν’ ’於圖框期間N時，受〇D code(過激驅動灰階碼)驅動 使電壓變化曲線如標號83所示，電壓為正極性，進入圖框 期間Ν’時，改由Target code來驅動液晶分子，同時電壓極 性反轉為負極性，電壓變化曲線如標號84所示。 然而，由於frame rate提高而縮短響應時間，卻也造成 面板充電時間不足’假設圖框速率60Hz下，於第一圖框期 籲 間82以OD code驅動面板，其電壓變化曲線如標號85所 示’而標號83之電壓變化曲線之上升速率雖然較標號％ 之電壓變化曲線快，但是充放電之電壓不足，無法到達滿 足骨度所需之電壓’圖框期間Ν’亦存在此問題，電壓變化 曲線84無法到達Target code對應的電壓變化曲線81，，造 成灰階損失(gray level loss)、無法達到預期之呈現亮度以及 亮度不均之問題，尤其是各相鄰圖框之極性相反而存在著 7 200839702 較高之電壓差，造成每一圖框之電壓皆無法達到預、_之電 壓。 . 再者，進行High frame rate時，電容充放電效應產生 的feed-through(饋入穿透）效應，將使得電壓變化曲線產生 如標號831之尖峰形狀以及標號832之電壓向下掉的曲線 變化，同時也造成Vcom值較資料中心值低，而交流驅動 電壓長久off-set(偏移）之情況下，畫面將會發生閃爍 ⑩ （Flicking)或是殘影（Image sticking)的現象，而電壓充電不 足的情況嚴重的話，從整個面板來看，面板有—半的書面 會變暗，或是沿著閘極線兩側之亮度明暗不一。 此外，液晶顯示器充電後將由電容器保持住電壓值， 以維持面板亮度直到下一次晝面的更新，此種顯像方式稱 之為存留式（Hold type)，但是若液晶分子反應速度不夠 快，顯示器上便會產生前一晝面之影像與後一畫面之影像 籲重疊，而造成影像模糊，即殘影現象，為了解決此問題， 可以擷取CRT顯示器之脈衝式（:呵以此啡…顯像方法的優 點’於液晶顯示上運用模擬脈衝(Pseu(J〇 impUlSe之 技術來呈現影像資料，主要方式係於連續影像畫面中插入 黑色資料或黑晝面，或是於背光源中插入黑晝面訊號，使 背光源閃爍，達到模擬CRT顯像之效果，用以消除殘影現 象。 8 200839702 然而，請參閱第11圖所不，高圖框速率技術應用於模 擬脈衝式之顯像方式時’假没其灰階碼及電壓變化曲線分 •別如“號91及92所示’其中灰階碼c〇de 〇將產生完全黑 、 色、無壳度之黑畫面，但因充電時間不夠，High frame rate 狀態下之電壓明顯不足，其電壓變化曲線91無法到達標號 93所示之一般圖框速率下之電壓變化曲線，也就造成灰階 值損失及亮度不均的問題’使得顯示器產生閃爍（Flicking) > 或是殘影（Image sticking)的現象。 再者，將傳統60Hz顯示速率之顯示器面板提升為60Hz 以上之顯示速率需將硬體結構設備進行變更，例如設置雙 倍的閘驅動器或資料驅動器，不僅對資料線(data_line)或開 啟電阻(turn-on resister)是挑戰極限，而且製造或設計過程 所耗費之材料、人力、時間之成本皆相對提高，甚至高達 —倍以上。200839702 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a multi-frame polarity inversion overdrive driving method of a type of subtractor, in particular, a frame rate rate wheel is raised and made in the same frame The multi-frame polarity inversion driving method of the display of the same polarity voltage during each voltage control period. [Prior Art] # Due to advances and updates in technology, the display does not advance toward the goal of small size and light weight, especially the liquid crystal display has the advantages of low power consumption, light weight of shell, no radiation and no flicker, and can be applied. Digital TVs, notebook computers or computer screens have gradually become the mainstream of the display industry 2 and are limited by the characteristics of liquid crystal molecules, such as hysteresis coefficient, elastic coefficient and "electric coefficient", so the display has its limitations and shortcomings. • Usually when the facet display speed exceeds 25 frames per second (f_e• The human eye will see the viewed face as a continuous action, and the current image display speed is often 6 per second (above the box) To meet the needs of action films, games or high-quality DVD shirts. The brightness of the LCD panel is presented, and the liquid crystal is applied to the liquid crystal cell (the liquid crystal molecules are rotated to control the proportion of light transmitted through the backlight module. Waste-driven liquid crystal molecule reaction requires response time (Response time) technology that will drive the drive dust without changing the display panel structure to shorten the response time of the liquid crystal display. For example, the overdrive (OD) technology is used in the 200839702. For example, if the display panel is in the frame n and the frame Ν+ι /, a, the brightness is the target code. The corresponding voltage micro-cursor 61 is shown in the curve, and the overdrive driving technique is used to replace the over-coded gray-scale code (OD code) instead of the target code, and corresponds to the overdrive-driven gray-scale code. The voltage change is indicated by the reference numeral 62, so as to quickly reach the brightness desired by the panel; after entering the frame N+1, the liquid crystal panel is driven by the voltage corresponding to the target code to achieve the desired brightness. When the voltage of the display electrode is still at the common voltage Vcom of the liquid crystal panel, it is called positive polarity, otherwise it is called negative polarity. If the voltage is driven by c〇mm〇n voltage, the positive and negative voltages are alternated. It is called polarity inversion. There are four kinds of traditional polarity inversion methods, which are frame inVerSi〇n (face inversion) as shown in Fig. 9A, and converted from frame N to frame N+. At 1 o'clock, the polarity of the area of the entire # face As shown in the figure, from positive polarity to negative polarity, the change in polarity is in units of planes; c〇lumn inversion (row inversion) shown in Fig. 9B changes its polarity in units of rows; In the case of Row inVerSi〇n (column inversion), the change in polarity is in units of columns; and in Dotinversion (point inversion) shown in Fig. 9D, the change in polarity is in points. In order to meet the needs of higher-order fast image processing 200839702, the industry's display panel has introduced a high-frame rate display panel, which means that the structure of the LCD panel is changed to speed up the update of the frame, even, doubling, for example, The frame rate of 60Hz is increased to 70Hz, 80Hz, the stomach is even the frame rate of 120Hz, and the voltage and grayscale code (c〇de) change pattern is shown in Fig. 10, wherein the voltage change of the original frame rate of 60Hz should be Within the dashed line of the standard 5 Tiger 81,81, after the voltage is driven by doubling 12 Hz, the charging, discharging and sustaining time of the capacitor will be reduced by half, that is, the original frame period 82 is divided into Frame period n and graph During the period Ν ' ' during the frame period N, the voltage change curve is driven by the D code (overdrive gradation code), and the voltage is positive. When entering the frame period Ν ', the target code is changed. The liquid crystal molecules are driven while the voltage polarity is reversed to a negative polarity, and the voltage change curve is indicated by reference numeral 84. However, the response time is shortened due to the increase of the frame rate, but the panel charging time is also insufficient. Assuming the frame rate is 60 Hz, the panel is driven by the OD code in the first frame period, and the voltage change curve is as shown by reference numeral 85. 'When the rate of increase of the voltage change curve of the number 83 is faster than the voltage change curve of the number of %, the voltage of the charge and discharge is insufficient, and the voltage required to satisfy the bone condition cannot be reached. The frame period Ν' also has this problem, the voltage change The curve 84 cannot reach the voltage variation curve 81 corresponding to the Target code, causing gray level loss, failure to achieve the expected brightness and uneven brightness, especially the opposite polarity of each adjacent frame exists. 7 200839702 The higher voltage difference causes the voltage of each frame to fail to reach the voltage of pre- and _. Moreover, when the High frame rate is performed, the feed-through effect of the capacitor charging and discharging effect causes the voltage curve to produce a peak shape such as the shape of the peak of the numeral 831 and the voltage of the label 832. At the same time, the Vcom value is lower than the data center value, and the AC drive voltage is off-set for a long time, the screen will flash 10 (Flicking) or image sticking (Image sticking) phenomenon, and the voltage If the situation of insufficient charging is serious, from the perspective of the entire panel, the panel will have a half-written darkening or a different brightness along the sides of the gate line. In addition, after the liquid crystal display is charged, the voltage value is held by the capacitor to maintain the brightness of the panel until the next time the surface is updated. This type of development is called a Hold type, but if the liquid crystal molecules do not react fast enough, the display On the top, the image of the previous picture is overlapped with the image of the latter picture, which causes the image to be blurred, that is, the image sticking phenomenon. In order to solve this problem, the pulse type of the CRT display can be captured (: The advantage of the method is to use analog pulse on the liquid crystal display (Pseu (J〇impUlSe technology to present image data, the main way is to insert black data or black face in continuous image, or insert black 背光 in the backlight) The surface signal makes the backlight flicker and achieves the effect of analog CRT imaging to eliminate image sticking. 8 200839702 However, please refer to Fig. 11 and the high frame rate technique is applied to the analog pulse type imaging mode. 'There is no gray scale code and voltage change curve. ・Do not be as shown in No. 91 and 92. The gray scale code c〇de 〇 will produce black, full color and no shell. Face, but due to insufficient charging time, the voltage in the High frame rate state is obviously insufficient, and the voltage change curve 91 cannot reach the voltage curve under the general frame rate indicated by the label 93, which causes the gray scale value loss and the brightness not to be The problem of 'all causes the display to flicker > or image sticking. Moreover, the display panel of the traditional 60Hz display rate is increased to a display rate of 60Hz or more, and the hardware structure device needs to be changed. For example, setting double the gate driver or data driver not only limits the data line (data_line) or turn-on resister, but also increases the cost of materials, labor, and time for the manufacturing or design process. Even up to - times more.
I 緣此，本案之發明人為了解決上述問題，累積多年設 計製造之經驗，經不斷思考、製造及修正，遂有本發明之 石延〇 【發明内容】 本發明之主要目的係提供Z種顯示器之多圖框極性反 轉過激驅動方法，其保留使用現有顯示器架構，無須進行 硬體設備變更或提升，即可提高亮度表現，減少灰階值損 200839702 失’藉此降低生產成本，提升競爭力。 本發明之另-目的係提供一種顯示器之多圖框極性反 轉過激驅動方法’其將圖框期間之圖框料輪碌a.加e _ut)提高而區分為至少二電壓控制期間，並使同—圖框期 間之各電壓控制期間之電㈣極性，縮短電職，快速達 到亮度之呈現。 本發明之又-目的係提供一種顯示器之多圖框極性反 轉過激驅動方法，其可應用於模擬脈衝式之顯示器，減少 灰階損失及亮度不足的問題。 為了達到上述目的’本發明之顯示器之多圖框極性反 轉過激驅動方法包含：令該顯示器面板錢—圖框之過程 為一圖框射日1 ’將該®框期間之®框速率輪碌ame她 提高，使該圖框期間被區分為至少二電㈣制期間， 亦即包含第-電壓控制期間以及第二電壓控制期間，於第 -電壓控制期間，係由一第一灰階碼(code)控制亮度之呈 現’而-用以驅動顯示器面板之第—電齡對應於該第一 灰階碼；接著，該第二電壓控制期間緊接於第一電壓控制 期間之後，於第二電壓控制期間，係由一第二灰階碼控制 亮度之呈現，而一用以驅動顯示器面板之第二電壓值對應 於該第一灰階碼，該第二電屋值與第一電壓值同極性，藉 此使本發明無須變更傳統硬體架構，且未造成功率之負擔 200839702 (duty-free) 〇 【實施方式】 替明目的及其達成之 詳細說明之，並請一 為令本發明所運用之技術内容、 功效有更完整且清楚的揭露，茲於下 併參閱所揭之圖式及圖號： 首先需說明的是，本發明戶 器面板之架構下進行，轉變更^之方法係在傳統顯示 示器面板係由複數個顯示單架構，其中，假設顯 夂％ - - - >上丄 、且成，以液晶螢幕來說， 示單元藉由電壓值之 $ ^值之大小係由驅動顯示 圖所示，其為本發明 各喊不早兀亦稱為晝素（pixel)，各 改變呈現不同亮度變化，又， 單元之灰階碼(code)決定。 接著以圖示來說明，請參閱第工 之多圖框極性反轉過激驅動方 一抑—^ 實施例，假設該顯 不早兀係接收四個圖框，各圖框 _ 口框欲呈現之亮度以標的碼 (Target code)來表示，令每一被該 一 攸器面板之顯示單元接 收圖框之過程為一圖框期間。 在本實施例中，將第一個圖框期間標號為m且提高 其圖框速率伽跡她)輸人’例如將圖框速率輸入加倍， 將料龜的圖框速率提升至咖2圖框速率，此時原 本之第®框期間U1被分割為兩個電壓控制期間N,N，， 於第一電壓控制期間ν，令-高於標的碼σ鱗。de)之過 11 200839702 激驅動灰階碼(OD code)作為第一灰階碼，使顯示單元接受 OD code對應之第一電壓值以供過激驅動，由圖可看出’ 該標的碼所對應之電壓變化範圍應介於標號112與標號 112,之間的直線，而原本60Hz的圖框速率下過激驅動灰階 碼(OD code)所呈現之電壓變化係如標號113之虛線，在加 倍之輸入圖框速率至120Hz作用下，實際產生之電壓變化 將如標號114之曲線所示，由於充電時間不足，則標號114 • 之電壓變化無法到達標號113所顯示之電壓變化曲線。 當第一電壓控制期間N結束後，隨即於該第一圖框期 間111之第二電壓控制期間N，，將一與該第一電壓值同極 性之第二電壓值輸入該顯示單元，在本實施例中，由於〇D code已使顯示單元接收之電壓高於Target code所對應之電 壓，故進入第一圖框期間111之第二電壓控制期間Ν’後.， 以第一圖框期間111之標的碼(Target code)作為第二灰階 _ 碼，並將第二灰階碼所對應之第二電壓值作為該輸入之電 壓，尤其是，該第二電壓值藉由極性控制（polarity control) 而與第一電壓控制期間N，之第一電壓值同極性，因OD code對應的第一電壓值接近了arget C0(je對應的電壓，故第 二電壓控制期間N，之實際電壓曲線變化（如標號114所示) 將可迅速地到達Target code對應之電壓曲線(標號112)，進 而達到該顯示器面板預期呈現之亮度，重要的是，並未增 12 200839702 加功率之負擔。 接著進入下一圖框期間時（亦即第二圖框期間115)，顯 • 不單兀接收與Target code對應之電壓，受到圖框速率增加 之故’於第二圖框期間115之前一期間N+1可能產生電壓 不足的現象，但也因從正極性之圖框N，進入圖框N+1之壓 出不大’故電壓變化曲線也較接近Target c〇de對應的電壓 變化曲線112’，——旦進入第二圖框期間ι15之後一期間 ⑩ N+1’將可使不足電壓被補足，進而達到呈現亮度所需之電 >1 ’減少灰階損失及解決亮度不足之問題。 接著請參閱第2圖所示，其為本發明之多圖框極性反 轉過激驅動方法之第二實施例，假設該顯示單元係接收四 個圖框，各圖框欲呈現之亮度以標的碼（Target c〇de)來表 示’其欲達到電壓變化範圍以標號〗2ΐ，ΐ2Γ之直線來表 示，而於第一圖框期間122於一般圖框速率下，例如6〇Ηζ， _ 輸入之〇D code以標號123之虛線表示，其對應電壓則為 標號124之虛線。 在本實施例中，將第一個圖框期間122輸入之圖框速 率（frame-rate)提高加倍，例如從60Hz提升至120Hz，原本 之第一個圖框期間122被分割為第一電壓控制期間n及第 二電壓控制期間Ν’，於第一電壓控制期間N，其以過激驅 動灰階碼(OD code)作為第一灰階碼，而該第一灰階碼對應 13 200839702 之第一電壓值所呈現之電壓變化係如標號125所示，與第 一實施例相同之結果，因充電時間不足，故電壓無法到達 標號124所顯示之電壓變化曲線。 但是當第一電壓控制期間N結束後，於隨後之第二電 壓控制期間Ν’將一與該第一電壓值同極性之第二電壓值輸 入該顯示單元，在本實施例中，由於OD code對應之第一 電壓值已使顯示單元接近60Hz所欲達到之電壓變化（標號 _ 124之曲線），故以第一圖框期間122之過激驅動灰階碼（〇d code)所對應之電壓作為該第二電壓值，尤其是該第二電壓 值藉由極性控制(poiarity control)而與第一電壓控制期間n 之第一電壓值同極性，此時，第二電壓控制期間N，之實際 電壓曲線變化（如標號126所示）將可迅速地到達〇d C0(je 對應之電壓曲線(如標號124所示），進而達到該顯示器面 板預期呈現之亮度。 • 接著進入下一圖框期間時（亦即標號127之第二圖框期 間），顯示單元接收與TarSet code對應之電壓，理想之電壓 變化曲線應如標號為121,121’之虛線所示，受到圖框速率 增加之故，於第二圖框期間127之前一期間N+1可能產生 電壓不足的現象，但是，一旦進入第二圖框期間127之後 一期間N+1後’將可使不足之電壓被補足，進而達到呈現 免度所需之電壓’減少灰階相失及解決売度不足之問題。 14 200839702 接著，請參閱第3圖所示，其為本發明之多圖框極性 反轉過激驅動方法之第三實施例，假設一顯示單元係連續 接收四個圖框，各圖框欲呈現之亮度以標的碼（Target c〇de) 來表示，其欲達到電壓變化範圍以標號ΠΙΠΐ，之直線來 表示，將第一個圖框期間132輸入之圖框速率（frame-rate) 提高加倍，例如從60Hz提升至120Hz，原本之第一個圖框 期間132被分割為第一電壓控制期間N及第二電壓控制期 _ 間N’，於第一電壓控制期間N，其以該圖框之標的碼(Target code)作為第一灰階碼137來驅動顯示單元，而與該第一灰 階碼137對應且用以驅動顯示器面板之第一電壓值所呈現 之電壓變化係如標號133所示，因充電時間不足，故電壓 無法到達標號131所顯示之電壓變化曲線。 但是當第一電壓控制期間N結束後，於隨後之第二電 壓控制期間N，以一第二灰階碼138控制亮度之呈現，該第 灰h碼13 8為一過激驅動灰階碼（〇d c〇(je)，將使顯示界 面板過激驅動（0ver_drive)，一第二電壓值與該第二灰階碼 138對應且為超過標的碼所需要之電壓，亦即，該第二電 壓值對應之電壓變化曲線(如標號134所示）將高於標號a】 所示之電壓變化曲線，尤其是，第二電壓值與第一電壓值 具有相同極性，藉此，從第一圖框期間132進入第二圖框 』間135日守’其電壓變化曲線136將可更為貼近顯示器面 15 200839702 板欲呈現亮度之電壓變化曲線131，。 再請參閱第4圖所示，其係為本發明之多圖框極性反 轉過激驅動方法之第四實施例，本實施例係為第三實施例 之延伸，假設於第一圖框期間141藉由加速圖框速率而分 割為第一電壓控制期間N及第二電壓控制期間N，，第—及 第二電壓控制期間N，N’分別由第一灰階碼143及第二灰階 碼144控制亮度，而第一灰階碼143為該圖框之標的碼， _ 該第二灰階碼144為過激驅動灰階碼c〇de)。 由於第一圖框期間141可能充電不足，故進入第二圖 框期間142之後，藉由圖框速率輸入提高，使第二圖框期 間142被區分為第三電壓控制期間N+i及第四電壓控制期 間N+1’，第三及第四電壓控制期間ν+1，ν+Γ分別由第三 灰階碼145及第四灰階碼146控制亮度之呈現，而用以驅 動顯不器面板之第三電壓值及第四電壓值分別對應於該第 _ 三灰階碼145及第四灰階碼146。 與前一實施例不同之處在於··該第三灰階碼145對照 々弟灰卩白碼143而為該圖框之標的碼（Target C0(je)，該第 四灰階碼146為根據第二電壓控制期間N，之第二灰階碼 144調整之回饋過激驅動灰階碼（feedback 〇d⑶如），亦即 該第四灰階碼146同樣可使顯示器面板過激驅動，但由於 月電壓控制期間141已進行過一次過激驅動，因此，該 16 200839702 電壓控制期間Ν+l，之第四灰階碼146將可適當地小於第二 灰階碼144且接近於標的碼，尤其是，第三及第四灰階碼 145,146所對應之第三及第四電壓值為同極性，但第一電壓 控制期間141與第二電壓控制期間142之電壓值極性相 反，亦即，第一及第二電壓值與第三及第四電壓值極性相 反，藉由本實施例之技術，將使充電不足之情況獲得改盖。Therefore, the inventor of the present invention has accumulated many years of experience in designing and manufacturing in order to solve the above problems, and has been thinking, manufacturing, and revising, and has the invention of the stone extension [invention] The main object of the present invention is to provide Z kinds of displays. The multi-frame polarity inversion overdrive method, which retains the existing display architecture, can improve the brightness performance without reducing hardware equipment changes or upgrades, reducing the grayscale value loss 200839702 loss, thereby reducing production costs and improving competitiveness. . Another object of the present invention is to provide a multi-frame polarity inversion overdrive driving method for a display, which increases the frame rotation of a frame during a frame period by a. plus e_ut, and distinguishes it into at least two voltage control periods, and In the same period, during the voltage control period of each frame, the polarity of electricity (4) is shortened, and the electric job is shortened, and the brightness is quickly reached. Still another object of the present invention is to provide a multi-frame polarity inversion overdrive driving method for a display which can be applied to an analog pulse type display to reduce the problem of gray scale loss and insufficient brightness. In order to achieve the above object, the multi-frame polarity inversion overdrive driving method of the display of the present invention comprises: making the display panel money-frame process a frame shot day 1 'the frame rate of the frame period during the frame period Iame she increases, so that the frame period is divided into at least two electric (four) system period, that is, including the first voltage control period and the second voltage control period, during the first voltage control period, by a first gray scale code ( Code) controlling the presentation of the brightness 'and - for driving the display panel - the electrical age corresponds to the first gray scale code; then, the second voltage control period is immediately after the first voltage control period, at the second voltage During the control, the second gray level code controls the presentation of the brightness, and a second voltage value for driving the display panel corresponds to the first gray level code, and the second electric value is the same as the first voltage value. Therefore, the present invention does not need to change the traditional hardware architecture, and does not cause a power burden. 200839702 (duty-free) 实施 [Embodiment] For the purpose and detailed description of the implementation, and please use the present invention The technical content and function have a more complete and clear disclosure. Please refer to the drawings and drawings. The first thing to note is that the method of transforming the panel of the invention is carried out. The display panel is composed of a plurality of display single-frame structures, wherein it is assumed that the display is -%, -, and, in the case of the liquid crystal screen, the display unit is driven by the value of the value of the ^^ value. As shown in the figure, it is said that the invention is not called early, also known as pixel, each change exhibits different brightness changes, and the grayscale code of the unit is determined. Then, as shown in the figure, please refer to the multi-frame polarity reversal overdrive driver--in the embodiment, suppose that the display system receives four frames, and each frame _ mouth frame is to be presented. The brightness is represented by a target code, so that each process of receiving the frame by the display unit of the buffer panel is a frame period. In this embodiment, the first frame period is marked as m and the frame rate is increased. The input is doubled, for example, the frame rate input is doubled, and the frame rate of the turtle is raised to the coffee 2 frame. The rate, at this time, the first period of the frame U1 is divided into two voltage control periods N, N, during the first voltage control period ν, let - above the standard code σ scale. De)11 200839702 The OD code is used as the first gray-scale code, so that the display unit accepts the first voltage value corresponding to the OD code for overdrive driving. It can be seen from the figure that 'the target code corresponds to The voltage variation range should be between the straight line between the reference numeral 112 and the reference numeral 112, and the voltage change exhibited by the overdrive driving gray scale code (OD code) at the original frame rate of 60 Hz is a dotted line of the reference numeral 113, which is doubled. When the input frame rate is 120 Hz, the actual voltage change will be as shown by the curve of the reference numeral 114. Since the charging time is insufficient, the voltage change of the reference numeral 114 cannot reach the voltage change curve indicated by the reference numeral 113. After the end of the first voltage control period N, and then during the second voltage control period N of the first frame period 111, a second voltage value of the same polarity as the first voltage value is input to the display unit. In the embodiment, since the voltage received by the display unit is higher than the voltage corresponding to the target code, the second voltage control period Ν' after the first frame period 111 is entered, to the first frame period 111. The target code is used as the second gray-scale code, and the second voltage value corresponding to the second gray-scale code is used as the voltage of the input. In particular, the second voltage value is controlled by polarity (polarity control) And the first voltage value in the first voltage control period N, the same polarity value, because the first voltage value corresponding to the OD code is close to the voltage corresponding to the arget C0 (je, so the actual voltage curve changes during the second voltage control period N) (As indicated by reference numeral 114), the voltage curve corresponding to the Target code (reference numeral 112) can be quickly reached, thereby achieving the expected brightness of the display panel. Importantly, the burden of the power increase of 200839702 is not increased. During a frame period (ie, during the second frame period 115), the display does not only receive the voltage corresponding to the Target code, but is affected by the increase in the frame rate, and may be N+1 before the second frame period 115. The phenomenon of insufficient voltage is generated, but also because the frame N of the positive polarity enters the frame N+1, the voltage change curve is closer to the voltage change curve 112' corresponding to the target c〇de, Once you enter the second frame period ι15, a period of 10 N+1' will make the insufficient voltage be complemented, and then achieve the power required to present the brightness > 1 'reduce the grayscale loss and solve the problem of insufficient brightness. Then see FIG. 2 is a second embodiment of the multi-frame polarity inversion overdrive driving method of the present invention. It is assumed that the display unit receives four frames, and each frame is to be rendered with a brightness code (Target c). 〇de) to indicate that 'the range of voltage change is to be represented by the line of the label ΐ2ΐ, ΐ2Γ, and during the first frame period 122 at the normal frame rate, for example, 6〇Ηζ, _ input 〇D code The dotted line of the reference numeral 123 indicates that it corresponds to electricity. The pressure is the dashed line of the numeral 124. In this embodiment, the frame-rate of the input of the first frame period 122 is doubled, for example, from 60 Hz to 120 Hz, and the first frame period. 122 is divided into a first voltage control period n and a second voltage control period Ν', during the first voltage control period N, which uses an overdrive gray scale code (OD code) as the first gray scale code, and the first gray The voltage change exhibited by the first voltage value of the order code corresponding to 13 200839702 is indicated by reference numeral 125. As a result of the same as the first embodiment, the voltage cannot reach the voltage change curve indicated by reference numeral 124 because the charging time is insufficient. However, after the end of the first voltage control period N, a second voltage value of the same polarity as the first voltage value is input to the display unit during the subsequent second voltage control period, in this embodiment, due to the OD code Corresponding first voltage value has made the display unit close to the voltage change desired by 60Hz (the curve of the number _ 124), so the voltage corresponding to the overdrive driving gray code (〇d code) of the first frame period 122 is taken as The second voltage value, in particular the second voltage value, is of the same polarity as the first voltage value of the first voltage control period n by polarity control, and at this time, the actual voltage of the second voltage control period N The change in the curve (as indicated by reference numeral 126) will quickly reach 〇d C0 (the voltage curve corresponding to je (as indicated by reference numeral 124) to achieve the desired brightness of the display panel. • Next to the next frame period (ie, during the second frame of reference numeral 127), the display unit receives the voltage corresponding to the TarSet code, and the ideal voltage change curve should be as indicated by the dotted line labeled 121, 121', subject to the increase of the frame rate. Therefore, during the period before the second frame period 127, N+1 may generate a voltage shortage phenomenon, but once it enters the second frame period 127, after a period of N+1, 'the undervoltage may be made up, and then The voltage required to achieve the degree of exemption reduces the problem of gray scale loss and insufficient resolution. 14 200839702 Next, please refer to FIG. 3, which is the multi-frame polarity inversion overdrive driving method of the present invention. In the third embodiment, a display unit continuously receives four frames, and the brightness of each frame to be presented is represented by a target code (Target c〇de), and the range of the voltage change is to be represented by a straight line. The frame rate of the input of the first frame period 132 is doubled, for example, from 60 Hz to 120 Hz, and the first frame period 132 is divided into the first voltage control period N and the second voltage. The control period _ between N', during the first voltage control period N, which drives the display unit with the target code of the frame as the first gray-scale code 137, and corresponds to the first gray-scale code 137 Used to drive the display surface The voltage change exhibited by the first voltage value is indicated by reference numeral 133. Since the charging time is insufficient, the voltage cannot reach the voltage change curve indicated by reference numeral 131. However, when the first voltage control period N ends, the subsequent During the second voltage control period N, the display of the brightness is controlled by a second gray code 138, which is an overdrive driving gray code (〇dc〇(je), which will make the display interface board overdrive (0ver_drive). a second voltage value corresponding to the second gray-scale code 138 and a voltage required to exceed the target code, that is, the voltage change curve corresponding to the second voltage value (as indicated by reference numeral 134) is higher than the label a] The voltage change curve shown, in particular, the second voltage value has the same polarity as the first voltage value, thereby entering the second frame from the first frame period 132 to the second frame 』 136 will be closer to the display surface 15 200839702 plate to display the voltage curve 131 of brightness. Referring to FIG. 4 again, it is a fourth embodiment of the multi-frame polarity inversion overdrive driving method of the present invention. This embodiment is an extension of the third embodiment, and is assumed to be in the first frame period 141. Dividing into the first voltage control period N and the second voltage control period N by accelerating the frame rate, the first and second voltage control periods N, N' are respectively performed by the first gray scale code 143 and the second gray scale code 144 controls the brightness, and the first gray-scale code 143 is the target code of the frame, and the second gray-scale code 144 is the overdrive-driven gray-scale code c〇de). Since the first frame period 141 may be insufficiently charged, after entering the second frame period 142, the frame rate input is increased, so that the second frame period 142 is divided into the third voltage control period N+i and the fourth. During the voltage control period N+1', the third and fourth voltage control periods ν+1, ν+Γ are controlled by the third gray scale code 145 and the fourth gray scale code 146 to respectively display the brightness, and are used to drive the display. The third voltage value and the fourth voltage value of the panel correspond to the third to third gray code 145 and the fourth gray code 146, respectively. The difference from the previous embodiment is that the third gray-scale code 145 is the target code of the frame (Target C0(je), which is based on the younger gray-white code 143. During the second voltage control period N, the second gray-scale code 144 adjusts the feedback overdrive driving gray-scale code (feedback 〇d(3), for example), that is, the fourth gray-scale code 146 can also drive the display panel to be overdriven, but due to the monthly voltage The control period 141 has been subjected to an overdrive operation. Therefore, the 16th 200839702 voltage control period Ν+1, the fourth gray scale code 146 will be suitably smaller than the second gray scale code 144 and close to the target code, in particular, The third and fourth voltage values corresponding to the third and fourth gray scale codes 145, 146 are the same polarity, but the voltage values of the first voltage control period 141 and the second voltage control period 142 are opposite, that is, the first and second The voltage value is opposite in polarity to the third and fourth voltage values, and by the technique of the embodiment, the condition of insufficient charging is obtained.
本發明亦可應用於模擬脈衝技術，請參閱第5圖所 示，其為本發明之多圖框極性反轉過激驅動方去之第五， 施例，於第一電壓控制期間Ν，Ν+1，Ν+2，Ν+3，由 ^ 貝 階碼（code)控制亮度之呈現並由一第一雷 弟灰 不 甩Μ值對應於該第 一灰階碼，第二電壓控制期間Ν，，Ν+1，，κτ+7, μ " ，η+3’緊接於 一電壓控制期間Ν，Ν+1，Ν+2，Ν+3之後，於穿_ 、 、乐—電壓控制期 間Ν，，Ν+Γ，时，Ν+3,施予-第二灰階碼控㈣亮度之呈 現，同樣地，第二電壓值對應於該第二灰 人丨自崎，該第二電 壓值與第一電壓值同極性。 與前述實施例不同之處在於：當第—電壓控制期間ν 結束後，於隨後之第二電壓控制期間Ν，將一與該第—帝壓 控制期間之第-電壓值同極性之第二電壓值輸人該顯示單 元，在本實施例中，該第二電壓值係為使顯示器面板變黑 之電壓，雖然顯示器之灰階碼c〇de G將產生完全黑 鉦 亮度之黑晝面，而本發明實際應用時，令液晶顯示器之灰 17 200839702 階碼在一數值以下即可視為黑畫面，如code 5~ 10，在以下 說明中仍以code 0來表示黑晝面或使晝面變暗之電壓，尤 其是該第二電壓值藉由極性控制（polarity control)而與第一 電壓控制期間N之第二電壓值同極性，其電壓曲線變化如 標號31所示。 於本實施例，其係於各圖框期間32,33,34,35之第一電 壓控制期間Ν，Ν+1，Ν+2，Ν+3施予預設灰階碼（Pre code)或 標的碼(Target code)以作為第一灰階碼，而緊接著於第二電 壓控制期間1^，3+1，3+2,3+3，施予（：〇(!6〇，除此之外，該 第一電壓控制期間N，N+1，N+2，N+3亦可如前述實施例施予 一具有過激驅動效果之OD code以作為第一灰階碼。 無論高圖框速率技術或本發明之方法皆在於使圖框期 間縮短，進而可能因響應時間不足或充電時間不足而產生 免度不足之問題’提高亮度方法之一係將顯示器面板之液 晶盒間隙（Cell-gap)增加，為了避免更改液晶盒之結構，以 及因應面板製造過程中因加框造成之液晶盒間隙不一以及 亮度不均的問題，本發明提出另一種方法：充電壓補償 (charging voltage compensation)以使面板之亮度均勻化，該 充電壓補償係依顯示器面板之亮度呈現之差異進行調整， 首先，充電壓補償之方式係將顯示器面板區分為複數個補 償區’各補償區設有至少一補償灰階值，各補償灰階值係 18 200839702 由實際測量顯示器面板之亮度而得。 例如，顯示器面板四周因加框而受壓，受壓後之液晶 _ 盒間隙變小進而降低亮度，則面板四周之補償區之補償灰 階值將被提高；相反地，顯示器面板中央則受到面板四周 加框而將呈現稍微突起，故液晶盒間隙變大進而提高亮 度，則面板中央之補償區之補償灰階值將適當地降低，由 此可知，各補償區之補償灰階值之大小無論從左到右或從 • 上到下來看將呈現梯度變化排列。 上述各補償區之補償灰階值可儲存於一對照表 (look-up table)以供存取，當進行本發明之方法且進入第二 電壓控制期間時，依照各補償區之不同而將從對照表中存 取補償灰階值，使得第二電壓控制期間之驅動灰階值增 加、不變或減少，以第6圖為例，其進入第一圖框期間之 第二電壓控制期間Ν’後，將對照表之補償灰階值與第二電 • 壓控制期間Ν’之第二灰階碼結合，則使得第二電壓控制期 間Ν’呈現之第二電壓值（如標號41所示之電壓變化曲線） 高於標的碼所對應之電壓（標號42所示之電壓變化曲線)， 亦即此處之灰階碼係結合較大之補償灰階值，藉此使面板 之亮度提高。 本發明之充電壓補償之補償區可為矩形或線狀排列， 若為補償區為矩形區隔，如第7圖所示，其係將面板51大 19 200839702 略區分為九大補償區52’除此之外，亦可隨需要而、 細分，例如以32(像素)X32(像素）或64(像素)χ64(像素）= 單位，亮度呈現更貼近原始畫面。 '…' 若為充電壓補償之補償區設為線狀排列，則係指％ # 閘極線進行亮度實測而得，可得到更多之補償灰階值:者 得面板之亮度補償更為準確。 本發明主要係以液晶顯示器作為實施例說明，除此之 外，本發明亦可應用於有機發光二極體(〇LED)顯哭 水頌示器（PDP)或其他適當的顯示器，並不以此實施 由上可知，本發明具有下列之諸多優點： 1 本發明無需使用或改變原有顯示器之 足體架The invention can also be applied to the analog pulse technology, as shown in FIG. 5, which is the fifth embodiment of the multi-frame polarity inversion overdrive driver of the present invention, the embodiment, during the first voltage control period, Ν+ 1, Ν+2, Ν+3, the brightness is controlled by the ^be code and corresponds to the first gray level code by a first ray, and during the second voltage control period, , Ν +1,, κτ+7, μ " , η+3' immediately after a voltage control period Ν, Ν+1, Ν+2, Ν+3, during _, 、, Le-voltage control Ν, Ν+Γ, Ν, Ν+3, administration-second gray-scale code control (four) presentation of brightness, likewise, the second voltage value corresponds to the second gray person 丨 崎, the second voltage value Same polarity as the first voltage value. The difference from the foregoing embodiment is that, after the end of the first voltage control period ν, during the subsequent second voltage control period, a second voltage having the same polarity as the first voltage value during the first voltage control period is used. The value is input to the display unit. In the embodiment, the second voltage value is a voltage for blackening the display panel, although the gray scale code c〇de G of the display will generate a black surface with full black brightness. In the practical application of the present invention, the gray code of the liquid crystal display ash 17 200839702 can be regarded as a black screen under a numerical value, such as code 5~10, in the following description, the black 昼 surface is still represented by code 0 or the 昼 surface is darkened. The voltage, in particular the second voltage value, is of the same polarity as the second voltage value of the first voltage control period N by polarity control, and the voltage curve changes as indicated by reference numeral 31. In this embodiment, the first voltage control period Ν, Ν+1, Ν+2, Ν+3 of each frame period 32, 33, 34, 35 is applied to a preset gray code (Pre code) or The target code is used as the first gray code, and immediately after the second voltage control period 1^, 3+1, 3+2, 3+3, (:〇(!6〇, except this) In addition, the first voltage control period N, N+1, N+2, N+3 may also be applied as an OD code with an overdrive effect as the first gray scale code as in the foregoing embodiment. The rate technique or the method of the present invention is to shorten the frame period, and thus may cause the problem of insufficient insufficiency due to insufficient response time or insufficient charging time. One of the methods for improving the brightness is to set the cell gap of the display panel (Cell-gap). In order to avoid changing the structure of the liquid crystal cell, and in response to the problem of uneven cell gap and uneven brightness caused by the frame in the panel manufacturing process, the present invention proposes another method: charging voltage compensation The brightness of the panel is made uniform, and the charging voltage compensation is performed according to the brightness of the display panel. The difference is adjusted. First, the charging voltage compensation method divides the display panel into a plurality of compensation zones. Each compensation zone is provided with at least one compensation grayscale value, and each compensation grayscale value system 18 200839702 is actually measured by the brightness of the display panel. For example, the periphery of the display panel is pressed by the frame, and the liquid crystal _ box gap becomes smaller to reduce the brightness, so that the compensation gray level value of the compensation area around the panel will be improved; conversely, the center of the display panel is When the frame is surrounded by a frame, the protrusion will be slightly raised, so that the gap of the liquid crystal cell becomes larger and the brightness is increased, and the compensation gray scale value of the compensation area in the center of the panel is appropriately lowered, thereby knowing the compensation gray scale value of each compensation zone. The size will appear as a gradient change arrangement from left to right or from top to bottom. The compensated grayscale values of the above compensation zones can be stored in a look-up table for access, when performing the present invention. And when entering the second voltage control period, the compensation gray scale value is accessed from the comparison table according to the difference of the compensation regions, so that the second voltage control period The driving gray scale value is increased, unchanged or reduced. Taking Figure 6 as an example, after entering the second voltage control period Ν ' during the first frame period, the compensation gray scale value and the second voltage and voltage control of the comparison table are controlled. During the combination of the second gray scale code of the period ,, the second voltage value (such as the voltage change curve indicated by the reference 41) presented during the second voltage control period is higher than the voltage corresponding to the target code (shown by 42). The voltage change curve), that is, the gray scale code here is combined with the larger compensation gray scale value, thereby increasing the brightness of the panel. The compensation region of the charging voltage compensation of the present invention may be rectangular or linear. The compensation area is a rectangular partition. As shown in Fig. 7, it is divided into a panel 51 large 39 19 39702 to be divided into nine large compensation areas 52 ′, in addition, it can be subdivided as needed, for example, 32 (pixels). ) X32 (pixel) or 64 (pixel) χ 64 (pixels) = unit, the brightness is rendered closer to the original picture. '...' If the compensation zone for charging voltage compensation is set in a line arrangement, it means that the % # gate line is measured by the brightness, and more compensation gray scale values can be obtained: the brightness compensation of the panel is more accurate. . The present invention is mainly described by using a liquid crystal display as an embodiment. In addition, the present invention can also be applied to an organic light emitting diode (〇LED) display crying water display (PDP) or other suitable display, and does not As can be seen from the above, the present invention has the following advantages: 1. The invention does not require the use or modification of the foot frame of the original display.
構’即可使電壓充電過程或得改善，相對土也 也減少亮度不足及灰階損失的問題，特別B 無功率負擔（duty-free)。 傳统 達到 本發明提出之施予電壓之方式可有效减少 極性反轉電壓差過大之問題，有效且快逮 面板欲呈現之亮度。 本發明提供顯示器區域亮度補償之方式，使乂 顯示器因製造過程中亮度不均的問題得以 : 20 200839702 前述之實施例或圖示並非限定本發明之結構樣態或尺 寸，任何所屬技術領域中具有通常知識者之適當變化或修 _ 飾，皆應視為不脫離本發明之專利範疇。 綜上所述，本發明實施例確能達到所預期之使用功 效，又其所揭露之具體構造，不僅未曾見諸於同類產品中， 亦未曾公開於申請前，誠已完全符合專利法之規定與要 求，爰依法提出發明專利之申請，懇請惠予審查，並賜准 • 專利，則實感德便。 【圖式簡單說明】 第1圖：本發明之第一實施例之示意圖 第2圖：本發明之第二實施例之示意圖 第3圖：本發明之第三實施例之示意圖 第4圖：本發明之第四實施例之示意圖 第5圖：本發明之第五實施例之示意圖 ® 第6圖：本發明進行充電壓補償之示意圖 第7圖：本發明於面板進行矩形補償區區分之示意圖 弟8圖·習知痛不裔面板過激驅動之不意圖 第9A圖：習知極性反轉方法之面反轉之示意圖 第9B圖：習知極性反轉方法之行反轉之示意圖 第9C圖：習知極性反轉方法之列反轉之示意圖 第9D圖：習知極性反轉方法之點反轉之示意圖 21 200839702 第10圖：習知高圖框速率（High frame rate)顯示器面板之命 壓及灰階碼變化之示意圖 . 第11圖：高圖框速率（High frame rate)技術應用於模擬脈衝 式顯像技術之示意圖 【主要元件符號說明】 <本發明> 第一圖框期間111 • 電壓變化範圍112,112， 電壓變化曲線113，114 第二圖框期間115 電壓變化範圍121，12Γ 131，131， 第一圖框期間122，132，141 〇D code 曲線 123 第二圖框期間127,135,142 _ 電壓變化曲線 124，125，126，133，134，136,31，41，42 第一灰階碼137,143 第二灰階碼138，144 第三灰階碼145 第四灰階碼146 第一電壓控制期間Ν，Ν+1，Ν+2，Ν+3 第二電壓控制期間Ν’，Ν+Γ，Ν+2，，Ν+3， 第三電壓控制期間Ν+1 22 200839702 第四電壓控制期間Ν+Γ 圖框期間32,33,34,35 . 面板51 . 補償區52 <習用技術> 圖框Ν，Ν+1 電壓變化曲線61 62 ® 基準電壓Vcom 電壓變化範圍線81，8Γ 第一圖框期間82 電壓變化曲線83,84,85,92,93 電壓變化曲線之尖峰831 電壓曲線之變化832 灰階碼變化曲線91 23The structure can improve the voltage charging process, and the relative soil also reduces the problem of insufficient brightness and gray scale loss, especially B has no power-duty. Conventionally, the method of applying the voltage proposed by the present invention can effectively reduce the problem of excessive polarity reversal voltage difference, and effectively and quickly capture the brightness desired by the panel. The invention provides a method for brightness compensation of a display area, so that the display of the germanium display is uneven due to uneven brightness during the manufacturing process: 20 200839702 The foregoing embodiment or illustration does not limit the structural form or size of the present invention, and has any technical field in the art. Appropriate changes or modifications of the knowledge of the person skilled in the art should be considered as not departing from the scope of the invention. In summary, the embodiments of the present invention can achieve the expected use efficiency, and the specific structure disclosed therein has not been seen in similar products, nor has it been disclosed before the application, and has completely complied with the provisions of the Patent Law. And the request, the application for the invention of a patent in accordance with the law, please give us a review, and grant a patent, it is really sensible. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a first embodiment of the present invention. FIG. 2 is a schematic view showing a second embodiment of the present invention. FIG. 3 is a schematic view showing a third embodiment of the present invention. FIG. BRIEF DESCRIPTION OF THE FOURTH EMBODIMENT OF THE INVENTION FIG. 5 is a schematic view of a fifth embodiment of the present invention. FIG. 6 is a schematic view showing charging voltage compensation according to the present invention. FIG. 7 is a schematic diagram showing the division of a rectangular compensation region in a panel of the present invention. 8 图·知知痛不族 panel overdrive drive is not intended. Figure 9A: Schematic diagram of the face inversion of the conventional polarity inversion method. Figure 9B: Schematic diagram of the reversal of the conventional polarity inversion method. Figure 9C: Schematic diagram of the column inversion of the conventional polarity inversion method. Fig. 9D: Schematic diagram of the dot inversion of the conventional polarity inversion method. 200839702 Fig. 10: The life pressure of the display panel of the high frame rate (High frame rate) Schematic diagram of grayscale code change. Fig. 11: Schematic diagram of high frame rate technique applied to analog pulsed imaging technology [Description of main component symbols] <present invention> • Voltage Scope 112, 112, voltage change curve 113, 114 second frame period 115 voltage change range 121, 12 Γ 131, 131, first frame period 122, 132, 141 〇 D code curve 123 second frame period 127, 135, 142 _ voltage change Curves 124, 125, 126, 133, 134, 136, 31, 41, 42 First grayscale code 137, 143 Second grayscale code 138, 144 Third grayscale code 145 Fourth grayscale code 146 First voltage control period Ν , Ν +1, Ν+2, Ν+3 During the second voltage control period Ν', Ν+Γ, Ν+2,,Ν+3, the third voltage control period Ν+1 22 200839702 The fourth voltage control period Ν+ Γ Frame period 32, 33, 34, 35. Panel 51. Compensation zone 52 < conventional technology > Frame Ν, Ν +1 voltage curve 61 62 ® Reference voltage Vcom Voltage variation range line 81, 8 Γ First During the frame period 82 voltage change curve 83, 84, 85, 92, 93 The peak of the voltage change curve 831 The change of the voltage curve 832 Gray-scale code change curve 91 23