TWI447702B - Driving module and liquid crystal display apparatus - Google Patents
Driving module and liquid crystal display apparatus Download PDFInfo
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本發明係關於一種驅動模組及顯示裝置，特別關於一種驅動模組及液晶顯示裝置。The invention relates to a driving module and a display device, in particular to a driving module and a liquid crystal display device.
液晶顯示(Liquid Crystal Display,LCD)裝置以其耗電量低、發熱量少、重量輕、以及非輻射性等等優點，已經被使用於各式各樣的電子產品中，並且逐漸地取代傳統的陰極射線管(Cathode Ray Tube,CRT)顯示裝置。Liquid crystal display (LCD) devices have been used in a wide variety of electronic products due to their low power consumption, low heat generation, light weight, and non-radiation, and gradually replaced the traditional A cathode ray tube (CRT) display device.
一般而言，液晶顯示裝置主要包括一液晶顯示面板、一驅動模組及一背光模組。其中，液晶顯示面板主要具有一薄膜電晶體基板(TFT substrate)、一彩色濾光基板(CF substrate)以及一夾設於兩基板問的液晶層，且兩基板與液晶層形成複數個陣列設置的畫素。另外，驅動模組係用以驅動液晶顯示面板。而背光模組可將一光源的光線均勻地分佈到液晶顯示面板，並經由各畫素顯示色彩而形成一圖案。Generally, a liquid crystal display device mainly includes a liquid crystal display panel, a driving module, and a backlight module. The liquid crystal display panel mainly has a TFT substrate, a CF substrate, and a liquid crystal layer sandwiched between the two substrates, and the two substrates and the liquid crystal layer are formed in a plurality of arrays. Picture. In addition, the driving module is used to drive the liquid crystal display panel. The backlight module can evenly distribute the light of a light source to the liquid crystal display panel, and display a color through each pixel to form a pattern.
然而，由於液晶顯示面板之各畫素間的電壓-穿透率曲線會隨著使用者觀看液晶顯示面板的角度(例如正看及側看)而有所不同。因此，於不同視角觀看液晶顯示面板時將會有色偏的現象產生。為改善色偏現象，一種習知技術是將單一畫素再分成一暗區及一亮區，藉由此兩區正看及側看的電壓-穿透率曲線不同而具有相互補償的效果，以達到降低色偏的目的。However, since the voltage-transmittance curve between the pixels of the liquid crystal display panel varies depending on the angle at which the user views the liquid crystal display panel (for example, looking at the side and side view). Therefore, when the liquid crystal display panel is viewed from different viewing angles, a color shift phenomenon occurs. In order to improve the color shift phenomenon, a conventional technique is to divide a single pixel into a dark area and a bright area, and the mutual compensation effect is obtained by the difference of the voltage-transmission curve between the two areas and the side view. In order to achieve the purpose of reducing color shift.
請參照圖1A所示，一種習知的液晶顯示裝置1係包含一液晶顯示面板11及一驅動模組12。液晶顯示面板11係包含薄膜電晶體基板(TFT substrate)及彩色濾光基板(CF substrate)，並具有複數個畫素。Referring to FIG. 1A , a conventional liquid crystal display device 1 includes a liquid crystal display panel 11 and a driving module 12 . The liquid crystal display panel 11 includes a thin film transistor substrate (TFT substrate) and a color filter substrate (CF substrate), and has a plurality of pixels.
驅動模組12係具有一掃描驅動電路121、一資料驅動電路122、一時序控制電路123及一珈瑪電壓(gamma voltage)產生電路124。掃描驅動電路121藉由複數條掃描線Sm 與液晶顯示面板11電性連接，資料驅動電路122藉由複數條資料線Dn 與液晶顯示面板11電性連接。珈瑪電壓產生電路124係包含一分壓電路，例如電阻串，可提供珈瑪電壓給資料驅動電路122作為其分壓用的參考電壓，並提供共同電壓給彩色濾光基板的共同電極。The driving module 12 has a scan driving circuit 121, a data driving circuit 122, a timing control circuit 123, and a gamma voltage generating circuit 124. The scan driving circuit 121 is electrically connected to the liquid crystal display panel 11 by a plurality of scanning lines S m , and the data driving circuit 122 is electrically connected to the liquid crystal display panel 11 by a plurality of data lines D n . The gamma voltage generating circuit 124 includes a voltage dividing circuit, such as a resistor string, which provides a gamma voltage to the data driving circuit 122 as a reference voltage for its voltage division, and provides a common voltage to the common electrode of the color filter substrate.
時序控制電路123係傳送垂直時脈訊號及垂直同步訊號至掃描驅動電路121，並將自外部介面所接收的視訊訊號轉換成資料驅動電路122所用的資料訊號，並傳送資料訊號、水平時脈訊號及水平同步訊號至資料驅動電路122。掃描驅動電路121係依據垂直時脈訊號及垂直同步訊號依序導通各掃描線Sm 。當掃描線Sm 導通時，資料驅動電路122係將對應每一列畫素的資料訊號，根據珈瑪電壓進行分壓以得到驅動畫素的電壓訊號，並藉由資料線Dn 將電壓訊號傳送至畫素的畫素電極。另外，珈瑪電壓產生電路124亦傳送共同電壓給彩色濾光基板的共同電極，使液晶藉由共同電極的共同電壓與畫素電極的電壓訊號形成之電場來作動。The timing control circuit 123 transmits the vertical clock signal and the vertical synchronization signal to the scan driving circuit 121, and converts the video signal received from the external interface into the data signal used by the data driving circuit 122, and transmits the data signal and the horizontal clock signal. And horizontally synchronizing the signal to the data driving circuit 122. The scan driving circuit 121 sequentially turns on the respective scan lines S m according to the vertical clock signal and the vertical sync signal. When the scan line S m is turned on, the data driving circuit 122 divides the data signal corresponding to each column of pixels, and divides the voltage according to the voltage of the gamma to obtain a voltage signal for driving the pixel, and transmits the voltage signal by the data line D n . The pixel electrode to the pixel. In addition, the gamma voltage generating circuit 124 also transmits a common voltage to the common electrode of the color filter substrate, so that the liquid crystal is actuated by the electric field formed by the common voltage of the common electrode and the voltage signal of the pixel electrode.
請同時參照圖1A及圖1B所示，其中，圖1B為圖1A之液晶顯示面板11的部分畫素示意圖。Please refer to FIG. 1A and FIG. 1B simultaneously. FIG. 1B is a partial schematic diagram of the liquid crystal display panel 11 of FIG. 1A.
為了改善色偏現象而使液晶顯示面板11之各畫素區分成一暗區及一亮區，習知之一種作法是藉由珈瑪電壓產生電路124(圖1B未顯示)以產生不同珈瑪電壓，並使時序控制電路123輸入畫素P1、P2之一第一區P11、P21及一第二區P12、P22的資料訊號分別對應不同的珈瑪電壓。如圖1B所示，透過資料線Dj ，以對應第一組珈瑪電壓之資料訊號驅動畫素P1之第一區P11；透過資料線Dj+1 ，以對應第二組珈瑪電壓之資料訊號驅動畫素P1之第二區P12；透過資料線Dj+2 ，以對應第一組珈瑪電壓之資料訊號驅動畫素P2之第二區P22；以及透過資料線Dj+3 ，以對應第二組珈瑪電壓之資料訊號驅動畫素P2之第一區P21，以此類推。In order to improve the color shift phenomenon, the pixels of the liquid crystal display panel 11 are divided into a dark area and a bright area. One conventional method is to generate different gamma voltages by the gamma voltage generating circuit 124 (not shown in FIG. 1B). The data signals input to the first region P11, P21 and the second regions P12 and P22 of the pixels P1 and P2 by the timing control circuit 123 respectively correspond to different gamma voltages. As shown FIG. 1B, through the data line D j, to correspond to a first region P11 of the first set of data signals gamma voltage driven pixel pitch P1; through the data line D j + 1, a second set of corresponding gamma voltage The data signal drives the second region P12 of the pixel P1; through the data line D j+2 , the second region P22 of the pixel P2 is driven by the data signal corresponding to the first group of gamma voltages; and the data line D j+3 is transmitted through the data line D j+3 . The first region P21 of the pixel P2 is driven by a data signal corresponding to the second group of gamma voltages, and so on.
於此，係使驅動第一區P11及第二區P12之資料線Dj 及資料線Dj+1 具有相同的資料訊號，並使驅動第一區P21及第二區P22之資料線Dj+2 及資料線Dj+3 具有相同的資料訊號。不過，卻使資料線Dj 與資料線Dj+2 的資料訊號對應第一組珈瑪電壓，並使資料線Dj+1 與資料線Dj+3 的資料訊號對應第二組珈瑪電壓。換言之，係使用兩組珈瑪電壓來驅動液晶顯示面板11之同一個畫素之第一區及第二區，以使液晶顯示面板11之每一畫素分別具有暗區及亮區，以達到降低色偏的目的。In this case, the data line D j and the data line D j+1 driving the first area P11 and the second area P12 have the same data signal, and drive the data lines D j of the first area P21 and the second area P22. +2 and data line D j+3 have the same data signal. However, the data signal Dj and the data signal of the data line D j+2 are corresponding to the first group of gamma voltages, and the data signals of the data line D j+1 and the data line D j+3 correspond to the second group of gamma. Voltage. In other words, the first and second regions of the same pixel of the liquid crystal display panel 11 are driven by using two sets of gamma voltages, so that each pixel of the liquid crystal display panel 11 has a dark region and a bright region, respectively. Reduce the purpose of color cast.
然而，上述為了改善色偏現象而使液晶顯示面板11之畫素分別具有暗區及亮區的作法，需使用至少兩倍的資料線來驅動所有畫素。舉例而言，假設原來每一掃描線Si 可同時開啟一列的畫素數量為480個，由於將每一畫素分為暗區及亮區，故每一畫素需二條資料線來驅動，使得液晶顯示面板11的資料線的數量需為960條，且資料驅動電路122需將960組資料訊號分別傳送至第一條資料線至第960條資料線，以分別驅動每一列畫素之第一區與第二區。如此，不僅使時序控制電路123接收及傳送的資料訊號是畫素數量的兩倍，而且，資料驅動電路122內部元件及其走線也相對較多而使其電路成本較高。However, in order to improve the color shift phenomenon, the pixels of the liquid crystal display panel 11 have dark areas and bright areas, respectively, and at least twice the data lines are required to drive all the pixels. For example, suppose that the number of pixels that can be simultaneously opened in one column of each scanning line S i is 480. Since each pixel is divided into a dark area and a bright area, each pixel requires two data lines to drive. The number of data lines of the liquid crystal display panel 11 needs to be 960, and the data driving circuit 122 needs to transmit 960 sets of data signals to the first data line to the 960th data line respectively to drive each column of pixels. One district and two districts. Thus, not only the data signal received and transmitted by the timing control circuit 123 is twice the number of pixels, but also the internal components of the data driving circuit 122 and the traces thereof are relatively large, so that the circuit cost is high.
因此，如何提供一種驅動模組及液晶顯示裝置，不僅可改善色偏現象，又可降低電路成本及資料訊號的傳送量，已成為重要課題之一。Therefore, how to provide a driving module and a liquid crystal display device can not only improve the color shift phenomenon, but also reduce the circuit cost and the amount of data signal transmission, and has become one of important topics.
有鑑於上述課題，本發明之目的為提供一種不僅可改善色偏現象，又可降低電路成本及資料訊號的傳送量之驅動模組及液晶顯示裝置。In view of the above problems, an object of the present invention is to provide a driving module and a liquid crystal display device which can not only improve color shift but also reduce circuit cost and data signal transmission amount.
為達上述目的，依據本發明之一種驅動模組用以驅動一液晶顯示面板，液晶顯示面板具有複數條資料線。驅動模組包括一資料驅動電路，資料驅動電路與該些資料線電性連接，並包括一資料暫存電路及一電壓位準移位電路。資料暫存電路具有複數個資料暫存元件，並輸出一第一資料訊號。電壓位準移位電路與資料暫存電路電性連接，電壓位準移位電路具有複數個位準移位元件，並接收第一資料訊號後輸出一第二資料訊號。其中資料線的數量與位準移位元件的數量相同，並為資料暫存元件之數量的至少兩倍，且為正整數倍數。To achieve the above objective, a driving module according to the present invention is used to drive a liquid crystal display panel having a plurality of data lines. The driving module includes a data driving circuit, and the data driving circuit is electrically connected to the data lines, and includes a data temporary storage circuit and a voltage level shifting circuit. The data temporary storage circuit has a plurality of data temporary storage components and outputs a first data signal. The voltage level shifting circuit is electrically connected to the data temporary storage circuit, and the voltage level shifting circuit has a plurality of level shifting components, and receives the first data signal and outputs a second data signal. The number of data lines is the same as the number of level shifting elements, and is at least twice the number of data temporary storage elements, and is a multiple of a positive integer.
為達上述目的，依據本發明之一種液晶顯示裝置包括一液晶顯示面板以及一驅動模組。液晶顯示面板包括複數條資料線。驅動模組包括一資料驅動電路。資料驅動電路與該些資料線電性連接，並包括一資料暫存電路及一電壓位準移位電路。資料暫存電路具有複數個資料暫存元件，並輸出一第一資料訊號。電壓位準移位電路與資料暫存電路電性連接，電壓位準移位電路具有複數個位準移位元件，並接收第一資料訊號後輸出一第二資料訊號，其中資料線的數量與位準移位元件的數量相同，並為資料暫存元件之數量的至少兩倍，且為正整數倍數。To achieve the above object, a liquid crystal display device according to the present invention includes a liquid crystal display panel and a driving module. The liquid crystal display panel includes a plurality of data lines. The drive module includes a data drive circuit. The data driving circuit is electrically connected to the data lines, and includes a data temporary storage circuit and a voltage level shifting circuit. The data temporary storage circuit has a plurality of data temporary storage components and outputs a first data signal. The voltage level shifting circuit is electrically connected to the data temporary storage circuit, and the voltage level shifting circuit has a plurality of level shifting components, and receives the first data signal and outputs a second data signal, wherein the number of the data lines is The number of level shifting elements is the same and is at least twice the number of data temporary storage elements and is a positive integer multiple.
藉此，雖然為了改善色偏現象而使液晶顯示面板之各畫素分為一暗區及一亮區，而使得資料線的數量為原畫素數量的兩倍，但是由於資料暫存電路之資料暫存元件的數量與移位暫存電路之移位暫存元件的數量為資料線數量的一半。因此，本發明之驅動模組及液晶顯示裝置不僅可使時序控制電路接收及傳送的資料訊號與每一列畫素的數量相同，而不必接收及傳送兩倍的資料量，而且資料驅動電路內部元件及其走線也相對較少，使得其電路成本降低。Therefore, although the pixels of the liquid crystal display panel are divided into a dark area and a bright area in order to improve the color shift phenomenon, the number of data lines is twice the number of original pixels, but due to the data temporary storage circuit The number of data temporary storage elements and the number of shift temporary storage elements of the shift temporary storage circuit are half of the number of data lines. Therefore, the driving module and the liquid crystal display device of the present invention can not only receive and transmit the data signal of the sequence control circuit and the number of pixels in each column, but do not need to receive and transmit twice the amount of data, and the internal components of the data driving circuit. And its routing is relatively small, making its circuit cost lower.
以下將參照相關圖式，說明依本發明較佳實施例之一種驅動模組及液晶顯示裝置，其中相同的元件將以相同的參照符號加以說明。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a driving module and a liquid crystal display device according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals.
請參照圖2A所示，其為本發明較佳實施例之一種驅動模組2的功能方塊示意圖。本發明之驅動模組2係用以驅動一液晶顯示面板3。其中，液晶顯示面板3可例如為扭轉向列(Twisted Nematic,TN)型、超扭轉向列(Super Twisted Nematic,STN)型、雙層超扭轉向列(Double layer Super Twisted Nematic,DSTN)型、垂直配向(Vertical Alignment,VA)型、水平電場效應(In-Plane Switching,IPS)型、膽固醇(Cholesteric)型或藍相(Blue Phase)型液晶顯示面板。另外，液晶顯示面板3可包含一薄膜電晶體基板與一彩色濾光基板相疊設置，且具有複數條掃描線Sm 及複數條資料線Dn ，並構成複數個畫素。各畫素之液晶可藉由薄膜電晶體基板之畫素電極與彩色濾光基板之共同電極之電壓差所形成之電場而驅動。Please refer to FIG. 2A , which is a functional block diagram of a driving module 2 according to a preferred embodiment of the present invention. The driving module 2 of the present invention is used to drive a liquid crystal display panel 3. The liquid crystal display panel 3 can be, for example, a Twisted Nematic (TN) type, a Super Twisted Nematic (STN) type, or a Double Layer Super Twisted Nematic (DSTN) type. Vertical Alignment (VA) type, In-Plane Switching (IPS) type, Cholesteric type or Blue Phase type liquid crystal display panel. In addition, the liquid crystal display panel 3 may include a thin film transistor substrate disposed on a color filter substrate, and having a plurality of scan lines S m and a plurality of data lines D n and constituting a plurality of pixels. The liquid crystal of each pixel can be driven by an electric field formed by a voltage difference between a pixel electrode of the thin film transistor substrate and a common electrode of the color filter substrate.
驅動模組2包括一時序控制電路21以及一資料驅動電路22。The driving module 2 includes a timing control circuit 21 and a data driving circuit 22.
時序控制電路21係產生一第一控制訊號CS1及一第一資料訊號DS1。於此，第一控制訊號CS1可例如包含水平時脈訊號及或水平同步訊號，而第一資料訊號DS1係可為驅動液晶顯示面板3之畫素資料。另外，時序控制電路21可將自外部介面所接收的視訊訊號轉換成資料驅動電路22所需的第一資料訊號DS1。The timing control circuit 21 generates a first control signal CS1 and a first data signal DS1. The first control signal CS1 can include, for example, a horizontal clock signal and a horizontal synchronization signal, and the first data signal DS1 can be a pixel data for driving the liquid crystal display panel 3. In addition, the timing control circuit 21 can convert the video signal received from the external interface into the first data signal DS1 required by the data driving circuit 22.
資料驅動電路22分別與時序控制電路21及該些資料線Dn 電性連接。其中，資料驅動電路22係藉由該些資料線Dn 將時序控制電路21輸出之第一資料訊號DS1經過處理後傳送至液晶顯示面板3之畫素電極。資料驅動電路22包括一移位暫存電路221、一資料暫存電路222及一電壓位準移位電路223。The data driving circuit 22 is electrically connected to the timing control circuit 21 and the data lines D n , respectively. The data driving circuit 22 processes the first data signal DS1 outputted by the timing control circuit 21 through the data lines D n and transmits the first data signal DS1 to the pixel electrode of the liquid crystal display panel 3. The data driving circuit 22 includes a shift temporary storage circuit 221, a data temporary storage circuit 222, and a voltage level shifting circuit 223.
移位暫存電路221與時序控制電路21電性連接。移位暫存電路221係依據移位暫存電路221所產生之第一控制訊號CS1產生一第二控制訊號CS2。其中，移位暫存電路221係依據時序控制電路21所輸出之第一控制訊號CS1來控制其動作時間，並輸出第二控制訊號CS2至資料暫存電路222。The shift register circuit 221 is electrically connected to the timing control circuit 21. The shift register circuit 221 generates a second control signal CS2 according to the first control signal CS1 generated by the shift temporary storage circuit 221. The shift temporary storage circuit 221 controls the operation time according to the first control signal CS1 outputted by the timing control circuit 21, and outputs the second control signal CS2 to the data temporary storage circuit 222.
資料暫存電路222與時序控制電路21及移位暫存電路221電性連接。其中，資料暫存電路222具有複數個資料暫存元件S，並可依據第二控制訊號CS2接收時序控制電路21所產生之第一資料訊號DS1。其中，資料暫存元件S的數量係對應資料線D的數量。於此，數量的對應不一定是1：1的對應關係，也可以是1比多，或是多比1的對應關係。The data temporary storage circuit 222 is electrically connected to the timing control circuit 21 and the shift temporary storage circuit 221 . The data temporary storage circuit 222 has a plurality of data temporary storage elements S, and can receive the first data signal DS1 generated by the timing control circuit 21 according to the second control signal CS2. The number of data temporary storage elements S corresponds to the number of data lines D. Here, the correspondence of the numbers is not necessarily a 1:1 correspondence, and may be a ratio of one to many or a ratio of one to one.
資料暫存電路222係依據第二控制訊號CS2控制其動作時間，以逐一開啟資料暫存元件S，並以閂鎖(latch)的方式將時序控制電路21輸出之第一資料訊號DS1依序儲存至每一個資料暫存元件S。當該些資料暫存元件S接收完第一資料訊號DS1時，資料暫存電路222可輸出第一資料訊號DS1。舉例而言，若第一資料訊號DS1的有效資料的數量是480筆時，則資料暫存元件S的數量至少為480個。再說明的是，上述之有效資料的數量是指輸入時序控制電路21中，並可透過資料驅動電路22及複數資料線Dn 驅動對應之複數畫素的資料訊號的數量。另外，有效資料的數量為480筆只是舉例，當然，使用者可依其需求設計不同數量的有效資料及其對應的電路。以下將以第一資料訊號DS1的有效資料的數量是480筆，且資料暫存元件S的數量亦為480個來說明。The data temporary storage circuit 222 controls the operation time according to the second control signal CS2 to open the data temporary storage element S one by one, and sequentially stores the first data signal DS1 outputted by the timing control circuit 21 in a latch manner. To each data temporary storage element S. When the data temporary storage component S receives the first data signal DS1, the data temporary storage circuit 222 can output the first data signal DS1. For example, if the number of valid data of the first data signal DS1 is 480, the number of data temporary storage elements S is at least 480. It is to be noted that the number of valid data mentioned above refers to the number of data signals input to the timing control circuit 21 and capable of driving the corresponding plurality of pixels through the data driving circuit 22 and the plurality of data lines D n . In addition, the number of valid materials is 480. This is just an example. Of course, users can design different amounts of valid data and their corresponding circuits according to their needs. In the following, the number of valid data of the first data signal DS1 is 480, and the number of data temporary storage elements S is also 480.
電壓位準移位電路223與資料暫存電路222電性連接。電壓位準移位電路223具有複數個位準移位元件L，且電壓位準移位電路223接收第一資料訊號DS1後輸出一第二資料訊號DS2。其中，電壓位準移位電路223可將例如3V/0V或5V/0V的較低電壓的邏輯準位，移轉到驅動畫素開關所需之20V以上的開啟電壓與-5V以下的關閉電壓。The voltage level shifting circuit 223 is electrically connected to the data temporary storage circuit 222. The voltage level shifting circuit 223 has a plurality of level shifting elements L, and the voltage level shifting circuit 223 receives the first data signal DS1 and outputs a second data signal DS2. Wherein, the voltage level shifting circuit 223 can shift the logic level of the lower voltage such as 3V/0V or 5V/0V to the turn-on voltage of 20V or more and the turn-off voltage of -5V or less required for driving the pixel switch. .
另外，如圖2B所示，各資料暫存元件S係分別與兩個位準移位元件L電性連接，以將各資料暫存元件S之資料同時傳送至兩個位準移位元件L內。於此，第二資料訊號DS2的資料量為第一資料訊號DS1的兩倍，例如為960筆，因此，位準移位元件L的有效數量與其對應，亦為960個。另外，上述中，第一資料訊號DS1及第二資料訊號DS2分別為數位訊號。In addition, as shown in FIG. 2B, each data temporary storage element S is electrically connected to the two level shifting elements L, respectively, to simultaneously transmit the data of each data temporary storage element S to the two level shifting elements L. Inside. The data amount of the second data signal DS2 is twice that of the first data signal DS1, for example, 960. Therefore, the effective number of the level shifting elements L is also 960. In addition, in the above, the first data signal DS1 and the second data signal DS2 are respectively digital signals.
因此，為了使液晶顯示面板3的每一畫素具有一第一區(例如暗區)及一第二區(例如亮區)(圖未顯示)，該些資料線Dn 的數量與該些位準移位元件L的數量(960)係相同，且該些資料線Dn 的數量(960)為該些資料暫存元件S之數量的至少兩倍，並為整數倍數。於此，係以兩倍(480)為例。另外，第二資料訊號DS2的資料量(960筆)為第一資料訊號DS1的兩倍(480筆)。Therefore, in order to make each pixel of the liquid crystal display panel 3 have a first region (for example, a dark region) and a second region (for example, a bright region) (not shown), the number of the data lines D n and the pixels The number of position shifting elements L (960) is the same, and the number of the data lines D n (960) is at least twice the number of the data temporary storage elements S, and is an integer multiple. Here, it is exemplified by twice (480). In addition, the data amount of the second data signal DS2 (960) is twice that of the first data signal DS1 (480).
另外，請參照圖3所示，其為驅動模組2之另一功能方塊示意圖。資料驅動電路22更可包括一第一數位類比轉換電路224a及一第二數位類比轉換電路224b，第一數位類比轉換電路224a及一第二數位類比轉換電路224b分別與電壓位準移位電路223電性連接。其中，第一數位類比轉換電路224a及第二數位類比轉換電路224b分別接收電壓位準移位電路223輸出之第二資料訊號DS2，並將數位之第二資料訊號DS2分別轉換成類比的第三資料訊號DS3及第四資料訊號DS4輸出。由於第二資料訊號DS2的資料量為960筆，故第一數位類比轉換電路224a及第二數位類比轉換電路224b於一個圖框時間中輸出之資料量亦分別為960筆。In addition, please refer to FIG. 3 , which is another functional block diagram of the driving module 2 . The data driving circuit 22 further includes a first digital analog conversion circuit 224a and a second digital analog conversion circuit 224b. The first digital analog conversion circuit 224a and the second digital analog conversion circuit 224b and the voltage level shift circuit 223 are respectively included. Electrical connection. The first digital analog conversion circuit 224a and the second digital analog conversion circuit 224b respectively receive the second data signal DS2 output by the voltage level shift circuit 223, and convert the second data signal DS2 of the digital digit into an analog third. The data signal DS3 and the fourth data signal DS4 are output. Since the data amount of the second data signal DS2 is 960, the data amount output by the first digital analog conversion circuit 224a and the second digital analog conversion circuit 224b in one frame time is also 960, respectively.
驅動模組2更可包括一珈瑪電壓產生電路23，珈瑪電壓產生電路23分別與第一數位類比轉換電路224a及第二數位類比轉換電路224b電性連接。其中，珈瑪電壓產生電路23產生一第一組珈瑪電壓G1以及一第二組珈瑪電壓G2，並分別輸入至第一數位類比轉換電路224a及第二數位類比轉換電路224b。其中，珈瑪電壓產生電路23可包含一分壓電路，例如電阻串，以分別提供第一組珈瑪電壓G1及第二組珈瑪電壓G2給第一數位類比轉換電路224a及第二數位類比轉換電路224b，作為其分壓用的參考電壓。The driving module 2 further includes a gamma voltage generating circuit 23, and the gamma voltage generating circuit 23 is electrically connected to the first digital analog converting circuit 224a and the second digital analog converting circuit 224b, respectively. The gamma voltage generating circuit 23 generates a first group of gamma voltages G1 and a second group of gamma voltages G2, and inputs them to the first digital analog conversion circuit 224a and the second digital analog conversion circuit 224b, respectively. The gamma voltage generating circuit 23 may include a voltage dividing circuit, such as a resistor string, to respectively provide the first group of gamma voltage G1 and the second group of gamma voltage G2 to the first digital analog conversion circuit 224a and the second digit. The analog conversion circuit 224b serves as a reference voltage for its voltage division.
另外，第一數位類比轉換電路224a係依據第二資料訊號DS2及第一組珈瑪電壓G1產生一第三資料訊號DS3，而第二數位類比轉換電路224b係依據第二資料訊號DS2及第二組珈瑪電壓G2產生一第四資料訊號DS4。換言之，第三資料訊號DS3與第四資料訊號DS4係對應不同的珈瑪電壓。在本實施例中，第一數位類比轉換電路224a係將數位之第二資料訊號DS2轉換成類比的第三資料訊號DS3，而第二數位類比轉換電路224b係將數位之第二資料訊號DS2轉換成類比的第四資料訊號DS4。由於第二資料訊號DS2的資料量為960筆，故第三資料訊號DS3及第四資料訊號DS4的資料量分別為960筆。In addition, the first digital analog conversion circuit 224a generates a third data signal DS3 according to the second data signal DS2 and the first group of gamma voltages G1, and the second digital analog conversion circuit 224b is based on the second data signal DS2 and the second The group gamma voltage G2 generates a fourth data signal DS4. In other words, the third data signal DS3 and the fourth data signal DS4 correspond to different gamma voltages. In this embodiment, the first digital analog conversion circuit 224a converts the second data signal DS2 of the digital number into an analog third data signal DS3, and the second digital analog conversion circuit 224b converts the second data signal DS2 of the digital digit. The analogy of the fourth data signal DS4. Since the data volume of the second data signal DS2 is 960, the data amount of the third data signal DS3 and the fourth data signal DS4 are respectively 960.
再者，資料驅動電路22更可包括一資料選擇電路225，資料選擇電路225分別與第一數位類比轉換電路224a及第二數位類比轉換電路224b電性連接。資料選擇電路225可從第三資料訊號DS3選擇出一第五資料訊號DS5，並可從第四資料訊號DS4選擇出一第六資料訊號DS6，且第五資料訊號DS5與第六資料訊號DS6係不相同。Furthermore, the data driving circuit 22 further includes a data selection circuit 225, and the data selection circuit 225 is electrically connected to the first digital analog conversion circuit 224a and the second digital analog conversion circuit 224b, respectively. The data selection circuit 225 can select a fifth data signal DS5 from the third data signal DS3, and can select a sixth data signal DS6 from the fourth data signal DS4, and the fifth data signal DS5 and the sixth data signal DS6 are Not the same.
舉例而言，資料選擇電路225可從第三資料訊號DS3中選擇讓奇數的資料訊號通過，以得到第五資料訊號DS5，並同時從第四資料訊號DS4選擇讓偶數的資料訊號通過，以得到第六資料訊號DS6。或者，資料選擇電路225可從第三資料訊號DS3中選擇讓偶數的資料訊號通過(第五資料訊號DS5)，並同時從第四資料訊號DS4選擇讓奇數的資料訊號通過(第六資料訊號DS6)。由於第三資料訊號DS3及第四資料訊號DS4的資料量分別為960筆，故第五資料訊號DS5及第六資料訊號DS6的資料量分別為480筆。For example, the data selection circuit 225 can select the odd data signal from the third data signal DS3 to obtain the fifth data signal DS5, and simultaneously select the even data signal from the fourth data signal DS4 to obtain The sixth data signal DS6. Alternatively, the data selection circuit 225 may select the even data signal from the third data signal DS3 (the fifth data signal DS5), and simultaneously select the odd data signal from the fourth data signal DS4 (the sixth data signal DS6). ). Since the data volume of the third data signal DS3 and the fourth data signal DS4 are respectively 960, the data amount of the fifth data signal DS5 and the sixth data signal DS6 are respectively 480.
第五資料訊號DS5例如可分別驅動液晶顯示面板11之畫素的第一區(例如暗區)，而同時第六資料訊號DS6可分別驅動畫素的第二區(例如亮區)，或者第五資料訊號DS5可驅動畫素的第一區(例如亮區)，而同時第六資料訊號DS6可驅動畫素的第二區(例如暗區)。此外，上述中，第三、四、五、六資料訊號DS3～DS6分別為電壓訊號(類比訊號)。The fifth data signal DS5 can respectively drive the first region (for example, the dark region) of the pixel of the liquid crystal display panel 11 respectively, and at the same time, the sixth data signal DS6 can respectively drive the second region of the pixel (for example, the bright region), or The fifth data signal DS5 can drive the first area of the pixel (for example, the bright area), while the sixth data signal DS6 can drive the second area of the pixel (for example, the dark area). In addition, in the above, the third, fourth, fifth, and sixth data signals DS3 to DS6 are voltage signals (analog signals), respectively.
另外，資料驅動電路22更可包括一類比緩衝放大電路226，類比緩衝放大電路226與資料選擇電路225及該些資料線Dn 電性連接。其中，類比緩衝放大電路226接收資料選擇電路225輸出之第五資料訊號DS5及第六資料訊號DS6，並輸入至該些資料線Dn ，以驅動該些畫素，並使每一畫素分別具有亮區與暗區，藉由此兩區正看及側看的電壓-穿透率曲線不同而具有相互補償的效果，以達到降低色偏的目的。其中，類比緩衝放大電路226使資料選擇電路225輸出的第五資料訊號DS5及第六資料訊號DS6具有較大的驅動能力，以驅動液晶顯示面板3之該些畫素。由於第五資料訊號DS5及第六資料訊號DS6的資料量分別為480筆，故類比緩衝放大電路226輸出的資料訊號為960筆。In addition, the data driving circuit 22 further includes an analog buffer amplifying circuit 226. The analog buffer amplifying circuit 226 is electrically connected to the data selecting circuit 225 and the data lines D n . Wherein the analog buffer amplifier circuit 226 receives data selection fifth and sixth data signals DS5 DS6 225 output data signals of the circuit, and input to the plurality of data lines D n, to drive the plurality of pixels, and each pixel respectively There are bright areas and dark areas, and the voltage-transmission curves of the two areas are different from each other and have mutual compensation effects to achieve the purpose of reducing the color shift. The analog buffer amplifying circuit 226 causes the fifth data signal DS5 and the sixth data signal DS6 output by the data selecting circuit 225 to have a large driving capability to drive the pixels of the liquid crystal display panel 3. Since the data amounts of the fifth data signal DS5 and the sixth data signal DS6 are respectively 480, the data signal output by the analog buffer amplifying circuit 226 is 960.
此外，驅動模組2更可包括一掃描驅動電路24，掃描驅動電路24分別與時序控制電路21及該些掃描線Sm 電性連接。掃描驅動電路24可接收時序控制電路21傳送之垂直時脈訊號及垂直同步訊號依序導通掃描線Sm ，以使資料驅動電路22將對應每一列畫素的資料訊號(第五資料訊號DS5及第六資料訊號DS6)，經由資料線Dn 傳送至畫素的畫素電極，以顯現對應的顯示畫面。Furthermore, the drive module 2 may further include a scan driving circuit 24, the scan driving circuit 21 and 24 respectively with the timing of the plurality of scan lines S m is electrically connected to a control circuit. 24 may receive the scan driving circuit a timing control circuit 21 transmits the vertical clock signal and a vertical synchronizing signal sequentially turned scan line S m, the driving circuit 22 so that data corresponding to each column of pixel data signals (fifth data signals and DS5 the sixth data signals the DS6), transmitted via data lines D n to the pixel electrode of the pixel, to visualize the corresponding display screen.
承上所述，本發明之驅動模組2之時序控制電路21只需接收480筆視訊訊號，並輸出480筆驅動畫素的資料訊號，而且資料驅動電路22對應的移位暫存電路221及資料暫存電路222的元件數量也只需480個即可，因此，本發明之驅動模組不僅可使時序控制電路21接收及傳送的資料訊號與每一列畫素的數量相同而不必接收及傳送兩倍的資料量，而且資料驅動電路22內部元件及其走線也相對較少使得其電路成本較高。As described above, the timing control circuit 21 of the driving module 2 of the present invention only needs to receive 480 video signals, and output data signals of 480 driving pixels, and the shift temporary storage circuit 221 corresponding to the data driving circuit 22 and The number of components of the data temporary storage circuit 222 is only 480. Therefore, the driving module of the present invention can not only receive and transmit the data signals received by the timing control circuit 21 and the number of pixels in each column without receiving and transmitting. There is twice the amount of data, and the internal components of the data driving circuit 22 and its traces are relatively small, making the circuit cost high.
此外，本發明之一種液晶顯示裝置包括一液晶顯示面板3以及一驅動模組2。其中，液晶顯示面板3與驅動模組2已於前述中詳細說明，於此不再贅述。In addition, a liquid crystal display device of the present invention includes a liquid crystal display panel 3 and a driving module 2. The liquid crystal display panel 3 and the driving module 2 have been described in detail in the foregoing, and details are not described herein again.
綜上所述，本發明之驅動模組及液晶顯示裝置不僅可使時序控制電路接收及傳送的資料訊號與每一列畫素的數量相同，而不必接收及傳送兩倍的資料量，而且資料驅動電路內部元件及其走線也相對較少，使得其電路成本降低。In summary, the driving module and the liquid crystal display device of the present invention can not only receive and transmit the data signal of the sequence control circuit and the number of pixels in each column, but do not need to receive and transmit twice the amount of data, and the data is driven. The internal components of the circuit and its traces are also relatively small, which reduces the cost of the circuit.
以上所述僅為舉例性，而非為限制性者。任何未脫離本發明之精神與範疇，而對其進行之等效修改或變更，均應包含於後附之申請專利範圍中。The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.
1．．．液晶顯示裝置1. . . Liquid crystal display device
11、3．．．液晶顯示面板11, 3. . . LCD panel
12、2．．．驅動模組12, 2. . . Drive module
121、24．．．掃描驅動電路121, 24. . . Scan drive circuit
122、22．．．資料驅動電路122, 22. . . Data drive circuit
123、21．．．時序控制電路123, 21. . . Timing control circuit
124、23．．．珈瑪電壓產生電路124, 23. . . Karma voltage generating circuit
221‧‧‧移位暫存電路221‧‧‧Shift register circuit
222‧‧‧資料暫存電路222‧‧‧data temporary storage circuit
223‧‧‧電壓位準移位電路223‧‧‧Voltage level shifting circuit
224a‧‧‧第一數位類比轉換電路224a‧‧‧first digital analog conversion circuit
224b‧‧‧第二數位類比轉換電路224b‧‧‧ second digital analog conversion circuit
225‧‧‧資料選擇電路225‧‧‧ data selection circuit
226‧‧‧類比緩衝放大電路226‧‧‧ analog buffer amplifier circuit
CS1、CS2‧‧‧控制訊號CS1, CS2‧‧‧ control signals
Dj 、Dj+1 、Dj+2 、Dj+3 、Dn ‧‧‧資料線D j , D j+1 , D j+2 , D j+3 , D n ‧‧‧ data line
DS1~DS6‧‧‧資料訊號DS1~DS6‧‧‧ data signal
G1‧‧‧第一組珈瑪電壓G1‧‧‧The first group of gamma voltage
G2‧‧‧第二組珈瑪電壓G2‧‧‧Second group gamma voltage
L‧‧‧位準移位元件L‧‧‧ position shifting element
P1、P2‧‧‧畫素P1, P2‧‧‧ pixels
P11、P21‧‧‧第一區P11, P21‧‧‧ first district
P12、P22‧‧‧第二區P12, P22‧‧‧Second District
S‧‧‧資料暫存元件S‧‧‧data temporary storage component
Si 、Si+1 、Sm ‧‧‧掃描線S i , S i+1 , S m ‧‧‧ scan line
圖1A為一種習知之液晶顯示裝置的示意圖；1A is a schematic view of a conventional liquid crystal display device;
圖1B為圖1A之液晶顯示面板的部分畫素示意圖；1B is a partial schematic diagram of a liquid crystal display panel of FIG. 1A;
圖2A為本發明較佳實施例之一種驅動模組的功能方塊示意圖；2A is a functional block diagram of a driving module according to a preferred embodiment of the present invention;
圖2B為圖2A之資料暫存電路與電壓位準移位電路的功能方塊示意圖；以及2B is a functional block diagram of the data temporary storage circuit and the voltage level shift circuit of FIG. 2A;
圖3為本發明之驅動模組的另一功能方塊示意圖。FIG. 3 is another functional block diagram of the driving module of the present invention.
2．．．驅動模組2. . . Drive module
21．．．時序控制電路twenty one. . . Timing control circuit
22．．．資料驅動電路twenty two. . . Data drive circuit
221．．．移位暫存電路221. . . Shift register circuit
222．．．資料暫存電路222. . . Data temporary storage circuit
223．．．電壓位準移位電路223. . . Voltage level shift circuit
3．．．液晶顯示面板3. . . LCD panel
CS1、CS2．．．控制訊號CS1, CS2. . . Control signal
Dn ．．．資料線D n . . . Data line
DS1、DS2．．．資料訊號DS1, DS2. . . Data signal
L．．．位準移位元件L. . . Level shifting element
S．．．資料暫存元件S. . . Data temporary storage component
Sm ．．．掃描線S m . . . Scanning line
Claims (15)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100129429A TWI447702B (en) | 2011-08-17 | 2011-08-17 | Driving module and liquid crystal display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100129429A TWI447702B (en) | 2011-08-17 | 2011-08-17 | Driving module and liquid crystal display apparatus |
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| Publication Number | Publication Date |
|---|---|
| TW201310426A TW201310426A (en) | 2013-03-01 |
| TWI447702B true TWI447702B (en) | 2014-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW100129429A TWI447702B (en) | 2011-08-17 | 2011-08-17 | Driving module and liquid crystal display apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11705031B2 (en) | 2018-10-01 | 2023-07-18 | Sitronix Technology Corp. | Source driver and composite level shifter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200919404A (en) * | 2007-10-29 | 2009-05-01 | Novatek Microelectronics Corp | Shift register circuit |
| US7609191B2 (en) * | 2005-11-05 | 2009-10-27 | Samsung Electronics Co., Ltd. | Digital/analog converting driver and method |
| TW200945309A (en) * | 2008-04-28 | 2009-11-01 | Novatek Microelectronics Corp | Data driving circuits for low color washout liquid crystal devices |
-
2011
- 2011-08-17 TW TW100129429A patent/TWI447702B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7609191B2 (en) * | 2005-11-05 | 2009-10-27 | Samsung Electronics Co., Ltd. | Digital/analog converting driver and method |
| TW200919404A (en) * | 2007-10-29 | 2009-05-01 | Novatek Microelectronics Corp | Shift register circuit |
| TW200945309A (en) * | 2008-04-28 | 2009-11-01 | Novatek Microelectronics Corp | Data driving circuits for low color washout liquid crystal devices |
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| TW201310426A (en) | 2013-03-01 |
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