201225052 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明係有關於一種液晶顯示器之驅動方法，特別 是有關於一種場序液晶顯示器之驅動方法。 _ [0002] C先前技術] 通常液晶顯示器的驅動方法有二種：彩色濾光片 (color filter)驅動方式和場色序（Field Sequen-tial Color)驅動方式。 〇 _] 彩色濾光片驅動方法是將一晝素分割成三個次畫素 分別對應彩色濾光片的紅色、綠色和藍色色阻，產生三 原色以形成色彩，場序液晶顯示器驅動方法不需要彩色 濾光片，使用單一種畫素配合紅、綠、藍色的背光源， 利用時序顯示紅、藍、綠等子畫面，藉由人眼視覺暫留 ，顯示畫面色彩。 [0004] 第一圖顯示一種場色序驅動方法。以圖框頻率60Hz 為例，場色序驅動方法將一個圖框分為四個次圖框，分 〇 別為紅色（R)、綠色（G)、藍色（B)，與黑色（K)次圖框。 除了黑色次圖框（K)只有黑色晝面寫入區間101，其餘每 個次圖框皆分為三個部分：資料寫入區間102、液晶反應 區間103、背光源開啟區間104。在另一種場色序驅動方 法，黑色晝面寫入區間101存在於每個次圖框或每一個圖 框之前（or之後），因此一個圖框總共有三個或一個黑色 畫面寫入區間101。 [0005] 寫入黑色晝面的目的之一是用於重置液晶分子，使 099142139 液晶分子在每一次驅動時均是從一固定之起始角度開始 表單編號A0101 第3頁/共25頁 0992073225-0 201225052 偏轉。另外，對於不同種類的液晶顯示器，寫入黑色畫 面可能帶來不同的影響。 [0006] 第二A圖與第二B圖顯示一種光學補償彎曲液晶顯示 器10(optica11y compensated bend liquid crys-tal display，OCB LCD)，在進入正常顯示狀態之前， 必須施加一操作電壓差於上基板12與下基板13之間，使 位於兩基板之間的液晶分子11，由展延態（splay state ，如第二A圖）轉換成彎曲態（bend state，如第二B圖） ;並且，在顯示器操作時，必須保持操作電壓大於一臨 界電壓Vcr，使液晶分子11保持在彎曲態。 [0007] 有文獻指出，若光學補償彎曲液晶顯示器使用場色 序驅動方法包含插入黑畫面，可降低其所需之臨界電壓 Vcr、提升面板的亮度。然而，對於某些類型的液晶顯示 器，例如光學補償彎曲液晶顯示器，插入黑晝面的電壓 無法被無窮地增加。第三圖顯示一光學補償彎曲液晶顯 示器的亮度與施加於液晶分子的電壓的關係圖。當施加 於液晶分子的電壓為P1點約5伏特時，所有液晶分子偏轉 至一遮斷背光源的特定角度，使得液晶顯示器顯示黑畫 面。亦即，P1點電壓即是傳統上在插入黑畫面區間101 ( 如第一圖）時施加於液晶分子上之電壓。當施加於液晶分 子的電壓為P2點約6伏特時，液晶偏轉速度增加，可減少 插入黑晝面區間101。當施加於液晶分子的電壓為增加為 8伏特以上時，可能會使液晶分子偏轉過度，導致漏光。 另外，如果增加插入黑畫面的寫入時間，雖可以讓插黑 畫面的效果增加，但同樣也會犧牲掉RGB晝面的顯示時間 099142139 表單編號A0101 第4頁/共25頁 0992073225-0 201225052 [0008] 因此，亟需提供一種新的液晶顯示器架構和驅動方 法，適當增加插入黑晝面區間的驅動電壓，可減少插入 黑畫面的時間、提升顯示器的亮度，並且，可減少光學 補償彎曲液晶顯示器的臨界電壓，減低電源消耗、增加 . 可靠度與穩定度。 【發明内容】 [0009] 本發明的目的在於提供一種新的驅動方法，適當增 加插入黑晝面區間的驅動電壓，可減少插入黑畫面的時 0 — 間、提升顯示器的亮度，並且，可減少光學補償彎曲液 晶顯示器的臨界電壓，減低電源消耗、增加可靠度與穩 定度。 [0010] 根據上述目的，本發明實施例提供一種液晶顯示器 的驅動方法，應用於一液晶顯示器，該液晶顯示器包含 複數條資料線和複數條閘極線，並藉此定義出複數個畫 素，每一該畫素包含一由晝素電極和一共同電極所形成 Q 之液晶電容以及一由該畫素電極和一所對應之偏壓線所 形成之儲存電容，其中，該偏壓線位於該畫素電極下方 ，該方法包含：分別給予該共同電極和該偏壓線不同之 電壓源；於每一顯示圖框寫入一紅色、綠色和藍色畫面 和至少一黑畫面，於該黑畫面插入期間，對一第一畫素 之畫素電極寫入一第一資料訊號，並對該第一畫素所對 應的一第一偏壓線寫入一第一偏壓線電壓，和對該共同 電極寫入一共同電極電壓；其中，該第一資料訊號與該 第一偏壓線電壓具有相同的第一極性，該偏壓線電壓造 099142139 表單編號A0101 第5頁/共25頁 0992073225-0 201225052 成一耦合效應，使該第一畫素之共同電極與該畫素電極 之間的電壓差達一第一電壓差，該第一電壓差係大於使 該第一畫素之液晶電容内液晶分子層的一液晶分子偏轉 至遮斷該背光源的一特定角度所需的電壓差。 【實施方式】 [0011] [0012] 以下將詳述本案的各實施例，並配合圖式作為例示。 除了這些詳細描述之外，本發明還可以廣泛地實行在其 他的實施例中，任何所述實施例的輕易替代、修改、等 效變化都包含在本案的範圍内，並以之後的專利範圍為 準。在說明書的描述中，為了使讀者對本發明有較完整 的了解，提供了許多特定細節；然而，本發明可能在省 略部分或全部這些特定細節的前提下，仍可實施。此外 ，眾所周知的程序步驟或元件並未描述於細節中，以避 免造成本發明不必要之限制。 本發明揭露一種液晶顯示器的架構和驅動方法，可 應用於各種類型的液晶顯示器，例如光學補償彎曲液晶 顯示器等。通常，液晶顯示器包含一上基板、一下基板（ 例如薄膜電晶體陣列基板），以及一液晶層設置於此兩基 板之間。一共同電極設置於該上基板上。複數條資料線 與複數條閘極線設置於下基板上，藉以定義出複數個畫 素，每一畫素具有一畫素電極，液晶層位於共同電極與 畫素電極之間。 本發明液晶顯示器的驅動方法，是一種場色序 (Field Sequential Co lor)驅動方法，因此顯示器不 需要彩色濾光片，僅使用單一種畫素配合紅 '綠、藍色 099142139 表單編號A0101 第6頁/共25頁 0992073225-0 [0013] 201225052 [0014] θ [0015] ❹ [0016] 的背光源，利用時序顯示紅、藍、綠等子畫面，藉由人 眼視覺暫留，顯示晝面色彩。在本發明的場色序驅動方 法中，每個圖框具有紅色、綠色、藍色、黑色四個次圖 框，其中黑色次圖框包含至少一個黑色畫面寫入區間101 ，如第一圖所示。 本發明液晶顯示器的驅動方法，其主要特徵在於， 在每次黑色畫面寫入區間101時，增加液晶分子的驅動電 壓，亦即，增加晝素電極與其共同電極間之間的電壓差 ;通常，此目的可利用調變畫素電極的電壓、調變共同 電極的電壓，或同時調變畫素電極與共同電極的電壓達 成。 共同電極的電壓值傳統上為固定，此時若欲增加插 入黑畫面區間的驅動電壓，可以增加源極驅動器的輸出 資料訊號電壓，藉由傳輸一較大的資料訊號（Data)電壓 至晝素電極達成，亦即，調變晝素電極的電壓是透過由 源極驅動器控制。但是此種方法會具有較高的製造程本 ，並非最佳解決方案。 為了避免液晶分子極化產生閃燦等現象，液晶顯示 器透過更換畫素驅動電壓的極性，正極性與負極性，以 避免電荷的累積。第四A圖至第四D圖顯示四種極性反轉 的方法，包括：第四A圖為圖框反轉（frame inversion) ; 第四 B 圖為欄反轉 （column inversion) ; 第四 C圖為列反轉（row inversion);以及第四D圖為點反轉 (dot inversion)，其中每一格代表一個畫素並標示其 驅動電壓的極性。 099142139 表單編號A0101 第7頁/共25頁 0992073225-0 201225052 [0017] 本發明液晶顯示器的驅動方法，依照不同極性反轉 方法而略有不同。第五圖顯示根據本發明一實施例的場 色序液晶顯示器驅動方法，本實施例可應用於第四A圖的 圖框反轉與第四C圖的列反轉，但不限定於此。本實施例 的驅動方法’可搭配第六A圖所示的晝素結構，其中掃描 線Gn-1、Gn與資料線Dn-1、Dn構成畫素px，其包含一開 關SW用於控制一資料訊號電壓（Data)輸入至畫素電極， 以及一偏壓線Bias 1設置於畫素電極PE下方。第六b圖 顯示第六A圖的等效電路圖，共同電極與畫素電極構成液 bb電谷Clc ’畫素電極:挪與偏灌線構成健存電容201225052 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a driving method of a liquid crystal display, and more particularly to a driving method of a field sequential liquid crystal display. _ [0002] C Prior Art] There are generally two driving methods for liquid crystal displays: a color filter driving method and a Field Sequen-tial Color driving method. 〇 _] The color filter driving method is to divide a quinone into three sub-pixels corresponding to the red, green and blue color resistance of the color filter, and generate three primary colors to form a color, and the field sequential liquid crystal display driving method does not need The color filter uses a single pixel to match the red, green, and blue backlights, and uses sub-pictures such as red, blue, and green to display the color of the picture by the human eye. The first figure shows a field color sequential driving method. Taking the frame frequency of 60Hz as an example, the field color sequential driving method divides a frame into four sub-frames, which are divided into red (R), green (G), blue (B), and black (K). Secondary frame. Except that the black sub-frame (K) has only the black face writing section 101, each of the remaining sub-frames is divided into three parts: a data writing section 102, a liquid crystal reaction section 103, and a backlight opening section 104. In another field color sequential driving method, the black face writing section 101 exists before each sub-frame or each frame (after or after), so that one frame has a total of three or one black picture writing section 101. [0005] One of the purposes of writing a black surface is to reset the liquid crystal molecules so that the liquid crystal molecules of 099142139 are driven from a fixed starting angle for each driving. Form No. A0101 Page 3 / Total 25 Page 0992073225 -0 201225052 Deflection. In addition, writing different black screens may have different effects for different types of liquid crystal displays. [0006] The second A and second B diagrams show an optically compensated curved liquid crystal display 10 (OCB LCD), and an operating voltage difference must be applied to the upper substrate before entering the normal display state. Between 12 and the lower substrate 13, the liquid crystal molecules 11 located between the two substrates are converted into a bend state (as in the second B diagram) from a splay state (as shown in FIG. 2A); When the display is operated, it is necessary to maintain the operating voltage greater than a threshold voltage Vcr to maintain the liquid crystal molecules 11 in a bent state. [0007] It is pointed out in the literature that if an optically compensated curved liquid crystal display uses a field color sequential driving method to include a black picture, the required threshold voltage Vcr and the brightness of the panel can be lowered. However, for some types of liquid crystal displays, such as optically compensated curved liquid crystal displays, the voltage inserted into the black face cannot be infinitely increased. The third graph shows the relationship between the brightness of an optically compensated curved liquid crystal display and the voltage applied to the liquid crystal molecules. When the voltage applied to the liquid crystal molecules is about 5 volts at the P1 point, all the liquid crystal molecules are deflected to a specific angle at which the backlight is interrupted, so that the liquid crystal display displays a black screen. That is, the P1 point voltage is a voltage which is conventionally applied to liquid crystal molecules when inserted into the black screen section 101 (as shown in the first figure). When the voltage applied to the liquid crystal molecules is about 6 volts at the point P2, the liquid crystal deflection speed is increased to reduce the insertion of the black enamel section 101. When the voltage applied to the liquid crystal molecules is increased by more than 8 volts, the liquid crystal molecules may be excessively deflected, resulting in light leakage. In addition, if you increase the write time of the black screen, you can increase the effect of inserting the black screen, but also sacrifice the display time of the RGB plane. 099142139 Form No. A0101 Page 4 / Total 25 Page 0992073225-0 201225052 [ 0008] Therefore, there is a need to provide a new liquid crystal display architecture and driving method, appropriately increasing the driving voltage inserted into the black-faced area, reducing the time for inserting black images, increasing the brightness of the display, and reducing the optical compensation curved liquid crystal display. The threshold voltage reduces power consumption, increase, reliability and stability. SUMMARY OF THE INVENTION [0009] An object of the present invention is to provide a new driving method, appropriately increase the driving voltage inserted into the black-faced interval, which can reduce the time of inserting a black screen, improve the brightness of the display, and can reduce Optically compensates for the critical voltage of a curved liquid crystal display, reducing power consumption, increasing reliability and stability. [0010] According to the above object, an embodiment of the present invention provides a driving method for a liquid crystal display, which is applied to a liquid crystal display, which includes a plurality of data lines and a plurality of gate lines, and thereby defines a plurality of pixels. Each of the pixels includes a liquid crystal capacitor formed by a halogen electrode and a common electrode, and a storage capacitor formed by the pixel electrode and a corresponding bias line, wherein the bias line is located at the Below the pixel electrode, the method includes: respectively applying a voltage source different from the common electrode and the bias line; writing a red, green, and blue picture and at least one black picture on each display frame, the black picture During the insertion, a first data signal is written to a pixel of the first pixel, and a first bias line voltage is written to a first bias line corresponding to the first pixel, and the The common electrode writes a common electrode voltage; wherein the first data signal has the same first polarity as the first bias line voltage, and the bias line voltage is 099142139 Form No. A0101 Page 5 / Total 25 Page 099 2073225-0 201225052 is a coupling effect, such that the voltage difference between the common electrode of the first pixel and the pixel electrode reaches a first voltage difference, the first voltage difference is greater than the liquid crystal capacitance of the first pixel A liquid crystal molecule of the inner liquid crystal molecular layer is deflected to a voltage difference required to block a specific angle of the backlight. [Embodiment] [0012] Each embodiment of the present invention will be described in detail below, with reference to the drawings as an example. In addition to the detailed description, the invention may be widely practiced in other embodiments, and any alternatives, modifications, and equivalent variations of the described embodiments are included in the scope of the present invention, and the scope of the following patents is quasi. In the description of the specification, many specific details are set forth in the description of the invention, and the invention may be practiced otherwise. In addition, well-known program steps or elements are not described in detail to avoid unnecessarily limiting the invention. The present invention discloses a structure and a driving method of a liquid crystal display, which can be applied to various types of liquid crystal displays, such as optically compensated curved liquid crystal displays and the like. Generally, a liquid crystal display comprises an upper substrate, a lower substrate (e.g., a thin film transistor array substrate), and a liquid crystal layer disposed between the two substrates. A common electrode is disposed on the upper substrate. A plurality of data lines and a plurality of gate lines are disposed on the lower substrate to define a plurality of pixels, each pixel having a pixel electrode, and the liquid crystal layer is located between the common electrode and the pixel electrode. The driving method of the liquid crystal display of the present invention is a Field Sequential Co lor driving method, so the display does not need a color filter, and only a single pixel is used with red 'green, blue 099142139 Form No. A0101 No. 6 Pages / Total 25 pages 0992073225-0 [0013] 201225052 [0014] θ [0016] The backlight of the [0016], using time series display red, blue, green and other sub-pictures, by the human eye persistence, display the face color. In the field color sequential driving method of the present invention, each frame has four sub-frames of red, green, blue, and black, wherein the black sub-frame includes at least one black picture writing interval 101, as shown in the first figure. Show. The driving method of the liquid crystal display of the present invention is characterized in that the driving voltage of the liquid crystal molecules is increased every time the black screen is written in the section 101, that is, the voltage difference between the pixel electrodes and the common electrode is increased; This purpose can be achieved by modulating the voltage of the pixel electrode, modulating the voltage of the common electrode, or simultaneously modulating the voltage of the pixel electrode and the common electrode. The voltage value of the common electrode is conventionally fixed. In this case, if the driving voltage inserted into the black screen interval is to be increased, the output data signal voltage of the source driver can be increased by transmitting a large data signal to the pixel. The electrode is achieved, that is, the voltage of the modulated halogen element is controlled by the source driver. However, this method will have a higher manufacturing process and is not the best solution. In order to avoid the phenomenon of flashing of liquid crystal molecules, the liquid crystal display can avoid the accumulation of electric charge by changing the polarity of the pixel driving voltage, positive polarity and negative polarity. The fourth to fourth figures D show four methods of polarity inversion, including: the fourth A picture is frame inversion; the fourth B picture is column inversion; fourth C The picture is column inversion; and the fourth D picture is dot inversion, where each cell represents a pixel and indicates the polarity of its driving voltage. 099142139 Form No. A0101 Page 7 of 25 0992073225-0 201225052 [0017] The driving method of the liquid crystal display of the present invention is slightly different according to different polarity inversion methods. The fifth figure shows a field color sequential liquid crystal display driving method according to an embodiment of the present invention. The present embodiment is applicable to the frame inversion of the fourth A picture and the column inversion of the fourth C picture, but is not limited thereto. The driving method of the present embodiment can be combined with the pixel structure shown in FIG. A, wherein the scanning lines Gn-1, Gn and the data lines Dn-1, Dn constitute a pixel px, which includes a switch SW for controlling one The data signal voltage (Data) is input to the pixel electrode, and a bias line Bias 1 is disposed under the pixel electrode PE. Figure 6b shows the equivalent circuit diagram of Figure 6A. The common electrode and the pixel electrode form a liquid bb electric valley Clc' pixel element: the moving and the partial irrigation line constitute a storage capacitor.
Cst ’且共用電極與偏壓線Biasl分別連接不同的電壓源 0 [0018] 回到第五圖，以列反轉的畫素Pxl為例，說明本發明 實施例的驅動方法，其中在圖框N時為正極性週期，圖框 N+1為負極性週期。於圖框N的黑色次圖框（κ)區間，亦即 丨丨. ... ；：： 黑色畫面插入區間1 〇 1 ’源::極驅务器輪入正極性的黑色資 料訊號電壓（Data)501至畫素電極’之後依照畫面需求 ’分別在藍色（B)、綠色（G)、紅色（R)次圖框的資料寫 入區間102，寫入資料訊號電壓502、503、504至畫素電 極。值付一提的是’本實施例中每一圖框中僅插入一専 色圖框’且黑色圖框是插入於紅色（R )與藍色（B )圖框間 ’然在其它實施例中，每一圖框並不僅限插入一黑色圖 框，且黑色圖框亦不僅限於插入於紅色與藍色^)圖 框間。 [0019] 複參第五圖，在黑色次圖框（κ)的同時，偏壓線電壓 099142139 表單編號A0101 第8頁/共25頁 0992073225-0 201225052Cst 'and the common electrode and the bias line Biasl are respectively connected to different voltage sources 0. [0018] Returning to the fifth figure, the column inversion pixel Pxl is taken as an example to illustrate the driving method of the embodiment of the present invention, in which the frame is When N is a positive polarity period, the frame N+1 is a negative polarity period. In the black sub-frame (κ) section of frame N, that is, 丨丨. ... ::: black screen insertion interval 1 〇 1 'Source:: The polar driver turns into the positive black data signal voltage ( Data) 501 to the pixel electrode 'after the screen requirement' in the blue (B), green (G), red (R) sub-frame data write interval 102, write data signal voltage 502, 503, 504 To the pixel electrode. It is worth mentioning that 'only one color frame is inserted in each frame in this embodiment' and the black frame is inserted between the red (R) and blue (B) frames. However, in other embodiments In the middle, each frame is not limited to inserting a black frame, and the black frame is not limited to being inserted between the red and blue ^) frames. [0019] In the fifth picture, in the black sub-frame (κ), the bias line voltage 099142139 Form No. A0101 Page 8 of 25 0992073225-0 201225052
Vb i as 1由電位5 0 5變化至電位5 06，即電位變化方向或極 性與資料訊號電壓501的電位變化方向或極性相同，亦即 屬正極性或正壓差（Vbiasl>0)。藉此，電壓差八 V,.,(電位506與原電位505的電壓差）會造成電容耦合 b 1 as 1 效應，由於電荷守恆原理，可提高晝素電極之電壓，進 而提高晝素電極與共同電極（Vcom)之間的電壓差，以增 加液晶分子的驅動電壓。若Δν .，代表在電容耦合後， pixel 共用電極與晝素電極間的電壓差變化量，即Δν .，約略 pixel 等於： C ，其 Ο _ i 广一· l 广—~ i ^ L$t *+ Cte + 中，Cgs為開關SW的寄生電容，Cx為雜散電容。由上述公 式可知，共同電極與畫素電極的電壓差變化量，隨著△ V b i a s 1增加而增加。 [0020] 另外，在黑色次圖框區間（K)，共同電極電壓 (Vcom)由電位507變化至電位508，亦即，此時共同電極 電壓與偏壓線電壓的電壓變化方向相反，且共同電極電 壓508的極性與資料訊號電壓501的極性相反，藉此，可 進一步增加液晶分子的驅動電壓。值得注意的是，在本 發明另一實施例，共同電極電壓Vcom的電壓值與極性可 以永遠皆保持固定（constant value)而非如第五圖所 示做正負變化；，換言之亦即，增加液晶分子驅動電壓 的手段，主要是由偏壓線電壓之壓差變化的耦合效應所 產生。另外，圖框N + 1為負極性週期，其驅動原理與正極 性週期相同，只是極性相反，不再贅述。另外，本實施 例的驅動方法也能類推於圖框反轉。 099142139 表單編號A0101 第9頁/共25頁 0992073225-0 201225052 [0021] [0022] [0023] 第七圖顯示根據本發明另一實施例的場色序液晶顯 不器驅動方法，本實施例可應用於第四B圖的欄反轉與第 四D圖的點反轉，但不限定於此。本實施例的驅動方法， 可搭配第六A圖所示的畫素結構，但不同處在於，同一列 兩相鄰畫素分別連接不同的偏壓線，偏壓線Biasl與偏壓 線Bias2，各自接收不同的偏壓線電壓信號；第八圖顯示 其等效電路圖，於同一列兩相臨畫素Ρχ1與Ρχ2，共同電 極與畫素電極構成液晶電容Cici與cic2、畫素電極ρε與 偏壓線Biasl構成儲存電容Cstl、畫素電極”與偏壓線 Bias2構成儲存電容Cst2，且共用黨極與偏壓線Biasl、 Bias2三者分別連接不同的電壓源。 回到第七圖’以點反轉的畫.素pxl與ρχ2為例，說明 本發明實施例的驅動方法，其中畫素ρχ 1在圖框Ν時為正 極性週期，圖框N+1為負極性週期；畫素Ρχ2在圖框Ν時為 負極性週期，圖框Ν+1為正極性週期。對於畫素ρχ1，於 圖框N的黑色次圖框（κ )區間，亦卽黑色畫面插入區間1 〇 1 ，源極驅動器輸入正極性的資料訊號電壓（!)31；3)7〇1至 晝素電極，之後依照畫面需求’分別在藍色（B)、綠色 (G)、紅色（R)次圖框的資料寫入區間1〇2，寫入正極性 的資料訊號電壓702、703、704至畫素電極。 在黑色次圖框（κ)的同時，偏壓線電壓Vbiasl由電 位705變化至電位706 ’且偏壓線電壓Vbiasl的電壓變化 方向或極性係與資料訊號電壓701相同，亦即，正極性或 正壓差（\biasl>0_;。藉此’電壓差△、.電位706與 電位705的電壓差）會造成電容轉合效應，可提高畫素電 099142139 表單編號A0101 第10頁/共25頁 0992073225-0 201225052 [0024] Ο [0025] ❹ [0026] 極與共用電極之間的電壓差，原理如前所述。 對於畫素Ρχ2，於圖框Ν的黑色次圖框（Κ)區間，源 極驅動器輸入負極性的資料訊號電壓（Data)707至畫素 電極，之後依照畫面需求，分別在藍色（B)、綠色（G)、 紅色（R)次圖框的資料寫入區間102，寫入負極性的資料 訊號電壓708、709、710至畫素電極。在此黑色次圖框 (K)的同時，偏壓線電壓Vbias2由電位705變化至電位 711，且偏壓線電壓Vbias2的變化方向或極性係與資料 訊號電壓707相同，亦即，負極性或負壓差（Vbiasl>0) 。藉此，電壓差A V。 “電位711與電位705的電壓差） bi as2 會造成電容耦合效應，可提高畫素電極與共用電極之間 的電壓差，原理如前所述。 值得注意的是，在本實施例，共同電極電壓Vcom的 電壓值與極性皆保持固定，亦即，增加液晶分子驅動電 壓的手段，主要是藉由與所對應的資料訊號同極性之偏 壓線電壓差，造成電容耦合效應而增加。另外，圖框N+1 的驅動原理與圖框N的驅動原理相同，不再贅述。另外， 本實施例的驅動方法也能類推於欄反轉。 η 值得注意的是，在本發明實施例是以儲存電容的增 加造成電容耦合效應，藉此增加液晶分子的驅動電壓。 儲存電容的參考電極並未限定，例如，儲存電容的另一 參考電極可為掃描線，或者，由偏壓線與一電容電極構 成一儲存電容，該電容電極可與資料線於同一製程中形 成。另外，相同原理可應用於畫素結構的其他電容。 099142139 表單編號Α0101 第11頁/共25頁 0992073225-0 201225052 [0027] 以上，本發明的實施例藉由增設一偏壓線，並以一 相對應的偏壓線電極進行控制，以產生儲存電容的電容 耦合效應，進而增加共用電極與畫素電極的電壓差，此 電壓差將大於使液晶分子偏轉至一遮斷背光源的特定角 度所需的電壓（P1)，例如，此電壓差可為P2或更大於P2 的電壓。根據本實施例，在插入黑晝面區間101，因為液 晶分子的驅動電壓增加，液晶分子的轉動速度隨著增加 ，可減短插入黑色晝面區間101，對於一般液晶顯示器， 可增加背光源開啟區間104而提昇顯示亮度；對於光學補 償彎曲液晶顯示器，還可以減少其臨界電壓，使降低電 源消耗節省成本、使液晶分子不容易受到環境溫度或外 在因素，回到展延態，提升了顯示器的穩定度與可靠度 。另外，由於本發明採用的手段並未調變資料訊號電壓 與共用電極電壓，不需增加源極驅動器的電壓輸出範圍 ，得以節省製造成本。 [0028] 上述眾實施例僅係為說明本發明之技術思想及特點 ，其目的在使熟悉此技藝之人士能了解本發明之内容並 據以實施，當不能以之限定本發明之專利範圍，即凡其 他未脫離本發明所揭示精神所完成之各種等效改變或修 飾都涵蓋在本發明所揭露的範圍内，均應包含在下述之 申請專利範圍内。 【圖式簡單說明】 [0029] 第一圖顯示一種習知場色序驅動方法； 第二A圖與第二B圖顯示一種習知光學補償彎曲液晶顯示 3S · 裔， 099142139 表單編號A0101 第12頁/共25頁 0992073225-0 201225052 Ο [0030]Vb i as 1 changes from the potential 5 0 5 to the potential 5 06, that is, the direction or polarity of the potential change is the same as the direction or polarity of the potential change of the data signal voltage 501, that is, the positive polarity or the positive pressure difference (Vbiasl > 0). Thereby, the voltage difference of eight V,., (the voltage difference between the potential 506 and the original potential 505) causes a capacitive coupling b 1 as 1 effect, and the voltage of the halogen electrode can be increased due to the principle of conservation of charge, thereby improving the halogen electrode and A voltage difference between the common electrodes (Vcom) to increase the driving voltage of the liquid crystal molecules. If Δν . represents the amount of change in voltage difference between the pixel common electrode and the pixel electrode after capacitive coupling, that is, Δν ., approximately pixel is equal to: C , which is Ο _ i wide one · l wide —~ i ^ L$t *+ In Cte + , Cgs is the parasitic capacitance of switch SW and Cx is the stray capacitance. As is apparent from the above formula, the amount of change in the voltage difference between the common electrode and the pixel electrode increases as ΔV b i a s 1 increases. [0020] In addition, in the black sub-frame interval (K), the common electrode voltage (Vcom) is changed from the potential 507 to the potential 508, that is, the common electrode voltage and the bias line voltage are opposite in direction, and are common. The polarity of the electrode voltage 508 is opposite to the polarity of the data signal voltage 501, whereby the driving voltage of the liquid crystal molecules can be further increased. It should be noted that in another embodiment of the present invention, the voltage value and polarity of the common electrode voltage Vcom may always be constant values instead of positive and negative changes as shown in FIG. 5; in other words, increasing liquid crystal The means by which the molecules drive the voltage are mainly caused by the coupling effect of the change in the voltage difference of the bias line voltage. In addition, the frame N + 1 is a negative polarity period, and the driving principle is the same as the positive polarity period, but the polarities are opposite, and will not be described again. Further, the driving method of this embodiment can be analogized to the frame inversion. 099142139 Form No. A0101 Page 9/Total 25 Page 0992073225-0 201225052 [0022] [0023] [0023] [0023] [0023] [0023] [0023] [0023] [0023] [0023] A field color sequential liquid crystal display device driving method according to another embodiment of the present invention is shown. It is applied to the column inversion of the fourth B diagram and the dot inversion of the fourth D diagram, but is not limited thereto. The driving method of this embodiment can be matched with the pixel structure shown in FIG. A, but the difference is that two adjacent pixels in the same column are respectively connected with different bias lines, the bias line Biasl and the bias line Bias2, Each receives different bias line voltage signals; the eighth figure shows its equivalent circuit diagram, in the same column two phases of pixels Ρχ1 and Ρχ2, the common electrode and the pixel electrode constitute liquid crystal capacitors Cici and cic2, pixel electrodes ρε and partial The pressure line Biasl constitutes the storage capacitor Cstl, the pixel electrode" and the bias line Bias2 constitute the storage capacitor Cst2, and the shared party pole and the bias lines Biasl, Bias2 are respectively connected to different voltage sources. Back to the seventh figure 'to point The reversed picture, prime pxl and ρχ2, is taken as an example to illustrate the driving method of the embodiment of the present invention, wherein the pixel ρ χ 1 is a positive polarity period in the frame ,, and the frame N +1 is a negative polarity period; When the frame is 负极, it is the negative polarity period, and the frame Ν+1 is the positive polarity period. For the pixel ρχ1, in the black sub-frame (κ) interval of the frame N, also the black picture insertion interval 1 〇1, the source The driver inputs the positive data signal voltage (!) 31 ;3) 7〇1 to the halogen electrode, and then write the data in the blue (B), green (G), and red (R) sub-frames according to the screen requirement, respectively, into the interval 1〇2, and write the positive polarity. The data signal voltages 702, 703, and 704 are connected to the pixel electrodes. At the same time as the black sub-frame (κ), the bias line voltage Vbias1 is changed from the potential 705 to the potential 706' and the voltage change direction or polarity of the bias line voltage Vbias1 is The same as the data signal voltage 701, that is, the positive polarity or the positive voltage difference (\biasl>0_; whereby the 'voltage difference Δ, the potential difference between the potential 706 and the potential 705) causes a capacitance switching effect, which can improve the drawing.素电099142139 Form No. A0101 Page 10/Total 25 Page 0992073225-0 201225052 [0024] 0026 [0026] The voltage difference between the pole and the common electrode, the principle is as described above. For the pixel Ρχ2, In the black sub-frame (Κ) section of the frame, the source driver inputs the negative data signal voltage (Data) 707 to the pixel electrode, and then in blue (B), green (G), according to the screen requirements. The data of the red (R) sub-frame is written in the interval 102, and the negative information is written. No. 708, 709, 710 to the pixel electrode. At the same time as the black sub-frame (K), the bias line voltage Vbias2 changes from the potential 705 to the potential 711, and the direction or polarity of the bias line voltage Vbias2 changes. The data signal voltage 707 is the same, that is, the negative polarity or the negative voltage difference (Vbiasl > 0). Thereby, the voltage difference AV. "The voltage difference between the potential 711 and the potential 705" bi as2 causes a capacitive coupling effect, which can improve the pixel The voltage difference between the electrode and the common electrode is as described above. It should be noted that, in this embodiment, the voltage value and the polarity of the common electrode voltage Vcom are kept fixed, that is, the means for increasing the driving voltage of the liquid crystal molecules is mainly by the bias line of the same polarity as the corresponding data signal. The voltage difference increases due to capacitive coupling effects. In addition, the driving principle of the frame N+1 is the same as the driving principle of the frame N, and will not be described again. In addition, the driving method of this embodiment can also be analogized to the column inversion. η It is worth noting that in the embodiment of the invention, the capacitive coupling effect is caused by an increase in the storage capacitance, thereby increasing the driving voltage of the liquid crystal molecules. The reference electrode of the storage capacitor is not limited. For example, another reference electrode of the storage capacitor may be a scan line, or a storage capacitor may be formed by a bias line and a capacitor electrode, and the capacitor electrode may be formed in the same process as the data line. . In addition, the same principle can be applied to other capacitors of the pixel structure. 099142139 Form No. 101 0101 Page 11 / Total 25 Page 0992073225-0 201225052 [0027] Above, the embodiment of the present invention generates a storage capacitor by adding a bias line and controlling it with a corresponding bias line electrode. The capacitive coupling effect increases the voltage difference between the common electrode and the pixel electrode. This voltage difference will be greater than the voltage (P1) required to deflect the liquid crystal molecules to a specific angle that blocks the backlight. For example, the voltage difference can be P2. Or greater than the voltage of P2. According to the embodiment, in the black mask section 101, since the driving voltage of the liquid crystal molecules increases, the rotation speed of the liquid crystal molecules increases, and the black mask section 101 can be shortened. For a general liquid crystal display, the backlight can be turned on. The interval 104 enhances the display brightness; for the optically compensated curved liquid crystal display, the threshold voltage can be reduced, the power consumption is reduced, the liquid crystal molecules are not easily exposed to ambient temperature or external factors, and the display state is returned to the extended state, thereby improving the display. Stability and reliability. In addition, since the method adopted by the present invention does not modulate the data signal voltage and the common electrode voltage, it is not necessary to increase the voltage output range of the source driver, thereby saving manufacturing costs. The above embodiments are merely illustrative of the technical spirit and characteristics of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, all other equivalent changes or modifications that are made without departing from the spirit of the invention are intended to be included within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS [0029] The first figure shows a conventional field color sequential driving method; the second A picture and the second B picture show a conventional optical compensation curved liquid crystal display 3S, 099142139 Form No. A0101 No. 12 Page / Total 25 pages 0992073225-0 201225052 Ο [0030]
第三圖顯示一習知光學補償彎曲液晶顯示器的亮度與施 加於液晶分子的電壓的關係圖； 第四Α圖至第四D圖顯示根據本發明實施例四種極性反轉 的方法； 第五圖顯示根據本發明一實施例的場色序液晶顯示器驅 動方法； 第六A圖顯示如第五圖驅動方法所配合的晝素結構實施例 > 第六B圖顯示第六A圖晝素結構的等效電路圖； 第七圖顯示根據本發明另一實施例的場色序液晶顯示器 驅動方法；以及 第八圖顯示如第七圖驅動方法所配合畫素結構的等效電 路圖。 【主要元件符號說明】 10光學補償彎曲液晶顯示器 ； 11液晶分子 12上基板The third figure shows a relationship between the brightness of a conventional optically compensated curved liquid crystal display and the voltage applied to the liquid crystal molecules; the fourth to fourth D figures show four methods of polarity inversion according to an embodiment of the present invention; The figure shows a field color sequential liquid crystal display driving method according to an embodiment of the present invention; FIG. 6A shows a pixel structure example as shown in the fifth figure driving method> FIG. 6B shows a sixth A figure pixel structure The equivalent circuit diagram; the seventh figure shows a field color sequential liquid crystal display driving method according to another embodiment of the present invention; and the eighth figure shows an equivalent circuit diagram of the pixel structure matched with the driving method of the seventh figure. [Main component symbol description] 10 optical compensation curved liquid crystal display; 11 liquid crystal molecules 12 upper substrate
• I ί. : ''…"- 13下基板 101黑色晝面寫入區間 102資料寫入區間 103液晶反應區間 104背光源開啟區間 501資料訊號電壓 502資料訊號電壓 503資料訊號電壓 099142139 504資料訊號電壓 表單編號A0101 第13頁/共25頁 0992073225-0 201225052 505偏壓線電壓 506偏壓線電壓 507共同電極電壓 508共同電極電壓 701資料訊號電壓 702資料訊號電壓 70 3資料訊號電壓 704資料訊號電壓 705偏壓線電壓 706偏壓線電壓 707資料訊號電壓 708資料訊號電壓 709資料訊號電壓 710資料訊號電壓 711偏壓線電壓 Biasl偏壓線1 Bias2偏壓線2 C1 c液晶電容 Clcl液晶電容 Clc2液晶電容 Cst儲存電容 Cstl儲存電容 Cst2儲存電容 Cgs寄生電容 Cx雜散電容 SW開關 099142139 表單編號A0101 第14頁/共25頁 0992073225-0 201225052 Ρχ畫素 Ρχΐ畫素 Px2畫素 PE畫素電極 R紅色次圖框 G綠色次圖框 B藍色次圖框 ' K黑色次圖框• I ί. : ''..."- 13 lower substrate 101 black face writing interval 102 data writing interval 103 liquid crystal reaction interval 104 backlight opening interval 501 data signal voltage 502 data signal voltage 503 data signal voltage 099142139 504 data Signal voltage form number A0101 Page 13 / 25 pages 0992073225-0 201225052 505 bias line voltage 506 bias line voltage 507 common electrode voltage 508 common electrode voltage 701 data signal voltage 702 data signal voltage 70 3 data signal voltage 704 data signal Voltage 705 bias line voltage 706 bias line voltage 707 data signal voltage 708 data signal voltage 709 data signal voltage 710 data signal voltage 711 bias line voltage Biasl bias line 1 Bias2 bias line 2 C1 c liquid crystal capacitor Clcl liquid crystal capacitor Clc2 Liquid crystal capacitor Cst storage capacitor Cstl storage capacitor Cst2 storage capacitor Cgs parasitic capacitance Cx stray capacitance SW switch 099142139 Form No. A0101 Page 14 / Total 25 pages 0992073225-0 201225052 Ρχ Ρχΐ Ρχΐ P P P P P P P P P P P P P P Sub-frame G green sub-frame B blue sub-frame 'K black sub-frame
Data資料訊號電壓 〇 Vcom共同電極電壓Data data signal voltage 〇 Vcom common electrode voltage
Vbiasl偏壓線電壓 Vbias2偏壓線電壓 〇 099142139 表單編號 A0101 第 15 頁/共 25 頁 0992073225-0Vbiasl bias line voltage Vbias2 bias line voltage 〇 099142139 Form number A0101 Page 15 of 25 0992073225-0