TWI551929B - A liquid crystal display and a driving method thereof are provided - Google Patents
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Description
本發明係有關於一種顯示器，特別是指一種液晶顯示器及其驅動方法。The present invention relates to a display, and more particularly to a liquid crystal display and a method of driving the same.
由於液晶顯示器不論在解析度、重量、厚度、反應速度以及耗電量等特性上皆優於傳統之陰極射線管(Cathode Ray Tube，CRT)顯示器，所以液晶顯示器已漸漸取代傳統之陰極射線管顯示器。加上，近年來液晶顯示器之技術進步突飛猛進，且隨著電子產品用途的不斷擴大，所以液晶顯示器的應用也越來越為廣泛。Since the liquid crystal display is superior to the conventional cathode ray tube (CRT) display in terms of resolution, weight, thickness, reaction speed and power consumption, the liquid crystal display has gradually replaced the conventional cathode ray tube display. . In addition, in recent years, the technological progress of liquid crystal displays has advanced by leaps and bounds, and with the continuous expansion of the use of electronic products, the application of liquid crystal displays has become more and more extensive.
液晶顯示器之畫面包含有複數畫素(pixel)，每一畫素包含一定面積之液晶而用於顯示影像。由於液晶受到電場作用會偏轉而改變光線的穿透率，所以液晶顯示器顯示影像時，會施加電壓至畫素以產生電場於畫素區域內之液晶，而控制畫素區域內之液晶的傾角，如此即可控制光線的穿透率，亦即可控制畫素之亮度。然而，由於每一畫素區域內之液晶僅受單一電位控制而偏轉單一傾角，這樣將使得在不同視角觀看畫面時，會因為觀看視線與液晶的夾角不同，而產生顏色與亮度失真之現象，此現象即為所謂的離軸色偏(color washout)。此種現象會導致在大視角所觀看到之畫面的色彩會不同於正視角所觀看的色彩，如此將造成僅能在一定視角內才能觀看到正常亮度之色彩畫面。若位在一定視角以外的位置觀看液晶顯示器之畫面時，則會因為亮度之差異看到色彩失真之畫面。The screen of the liquid crystal display includes a plurality of pixels, each of which contains a certain area of liquid crystal for displaying images. Since the liquid crystal is deflected by the electric field to change the transmittance of the light, when the liquid crystal display displays an image, a voltage is applied to the pixel to generate an electric field in the pixel region of the pixel region, and the tilt angle of the liquid crystal in the pixel region is controlled. In this way, the transmittance of the light can be controlled, and the brightness of the pixels can be controlled. However, since the liquid crystal in each pixel region is only controlled by a single potential and deflected by a single tilt angle, this will cause color and brightness distortion due to the difference between the viewing line of sight and the liquid crystal when viewing the image at different viewing angles. This phenomenon is the so-called off-axis color washout. This phenomenon causes the color of the picture viewed at a large viewing angle to be different from the color viewed by the positive viewing angle, which will result in a color picture that can only be viewed with normal brightness within a certain angle of view. If you look at the screen of the LCD monitor at a position other than a certain angle of view, you will see a picture of color distortion due to the difference in brightness.
因此，本發明即針對上述問題而提出一種液晶顯示器及其驅動方法，讓觀看液晶顯示器之畫面時，不會因為觀看視角之不同而產生顏色與亮度失真之現象，進而提高液晶顯示器之顯示效能，以解決上述問題。Therefore, the present invention provides a liquid crystal display and a driving method thereof for the above problems, so that when the screen of the liquid crystal display is viewed, the phenomenon of color and brightness distortion is not generated due to the difference in viewing angle, thereby improving the display performance of the liquid crystal display. To solve the above problems.
本發明之目的在於提供一種液晶顯示器及其驅動方法，使得每一畫素區域內之液晶有複數個偏轉角度，以在於任一視角觀看畫面時，觀看視線與不同偏轉角度之液晶的夾角總和會差異不大，如此可避免發生離軸色偏之現象，即透過提高液晶顯示器之視角來提高液晶顯示器之顯示效能。The object of the present invention is to provide a liquid crystal display and a driving method thereof, such that the liquid crystal in each pixel region has a plurality of deflection angles, so that when viewing the image at any viewing angle, the sum of the angles of the liquid crystals of the viewing line of sight and the different deflection angles will be The difference is not large, so that the phenomenon of off-axis color shift can be avoided, that is, the display performance of the liquid crystal display can be improved by improving the viewing angle of the liquid crystal display.
本發明液晶顯示器包含有複數掃描線、複數資料線、複數畫素、一資料驅動器與一掃描驅動器，其中掃描線與資料線分別呈列排列與行排列，且兩者相互交錯，用於傳送一掃描訊號與一資料訊號。本發明之每一畫素各具有複數子畫素，且各子畫素設有電性相耦接之一開關元件、一儲存電容與一子畫素電極；其中，開關元件耦接一掃描線，且畫素之該等子畫素的該等儲存電容分別耦接於和該等子畫素不同列之該等掃描線，或者畫素之該等子畫素之其中一者的儲存電容耦接於一共同電極，其餘子畫素之儲存電容則耦接於和子畫素不同列的掃描線；資料驅動器耦接資料線並分別傳送資料訊號至該等子畫素；掃描驅動器耦接該等掃描線並傳送掃描訊號至每一列之子畫素的開關元件，而驅動該等開關元件導通以接收資料訊號。本發明之一較佳驅動方法係藉由發送具複數階位準之掃描訊號至每一列之畫素，而調變同一畫素之子畫素之至少一子畫素電極之位準，驅使同一畫素之子畫素具有不同位準，如此即可讓同一畫素之區域內之液晶偏轉不同角度，而可解決離軸色偏之現象。The liquid crystal display of the present invention comprises a plurality of scan lines, a plurality of data lines, a plurality of pixels, a data driver and a scan driver, wherein the scan lines and the data lines are arranged in columns and rows, and the two are interleaved for transmitting one Scan the signal and a data signal. Each of the pixels of the present invention has a plurality of sub-pixels, and each of the sub-pixels is electrically coupled to one of the switching elements, a storage capacitor and a sub-pixel electrode; wherein the switching element is coupled to a scan line And the storage capacitors of the sub-pixels of the pixels are respectively coupled to the scan lines different from the sub-pixels, or the storage capacitors of one of the sub-pixels of the pixels Connected to a common electrode, the storage capacitors of the remaining sub-pixels are coupled to the scan lines of the different columns of the sub-pixels; the data driver is coupled to the data lines and respectively transmits the data signals to the sub-pixels; the scan driver is coupled to the scan electrodes The scan line transmits the scan signal to the switching elements of the sub-pixels of each column, and drives the switching elements to be turned on to receive the data signals. A preferred driving method of the present invention is to modulate the level of at least one sub-pixel electrode of a sub-pixel of the same pixel by transmitting a scanning signal having a complex order level to a pixel of each column, thereby driving the same picture. The sub-pixels of the prime have different levels, so that the liquid crystal in the region of the same pixel can be deflected at different angles, and the phenomenon of off-axis color shift can be solved.
第一圖係本發明較佳實施例之電路圖。如圖所示，液晶顯示器1包含有一掃瞄驅動器10、複數掃描線15、一資料驅動器20、複數資料線25、一時序控制器30與複數畫素40。掃描驅動器10耦接掃描線15，以傳送掃描訊號，其中掃描線15{Gn}，n=12,...,N呈列方式排列，N為正整數。資料驅動器20耦接資料線25，以傳送資料訊號，其中資料線25{Dm}，m=1,2,...,M呈行方式排列並與掃描線15相互交錯，M為正整數。時序控制器30耦接掃描驅動器10與資料驅動器20，其用於控制掃描驅動器10與資料驅動器20傳送掃描訊號與資料訊號。The first figure is a circuit diagram of a preferred embodiment of the present invention. As shown, the liquid crystal display 1 includes a scan driver 10, a plurality of scan lines 15, a data driver 20, a plurality of data lines 25, a timing controller 30, and a plurality of pixels 40. The scan driver 10 is coupled to the scan line 15 for transmitting scan signals, wherein the scan lines 15{G n }, n=12, . . . , N are arranged in a column, and N is a positive integer. The data driver 20 is coupled to the data line 25 for transmitting data signals, wherein the data lines 25{D m }, m=1, 2, . . . , M are arranged in a row and interlaced with the scan lines 15, and M is a positive integer. . The timing controller 30 is coupled to the scan driver 10 and the data driver 20 for controlling the scan driver 10 and the data driver 20 to transmit scan signals and data signals.
畫素40呈矩陣方式排列，每一畫素40各設有複數子畫素。在此實施例中，畫素40設有第一子畫素41與第二子畫素45，其中第一子畫素41與第二子畫素45各設有一開關元件42、46、一儲存電容43、47與一液晶電容44、48。開關元件42、46可為電晶體，其閘極各耦接一掃描線15，並接收掃描訊號而導通。此外，開關元件42、46之源極皆耦接一資料線25，而於導通時接收資料訊號。開關元件42之汲極與儲存電容43之一端皆耦接第一子畫素41之子畫素電極，其中畫素電極即為液晶電容44之一端，儲存電容43之另一端耦接至上一列的掃描線15，例如位於第N列掃描線15之第一子畫素41之儲存電容43耦接於第N-1列掃描線15。同於上述，第二子畫素45之開關元件46的汲極與儲存電容47之一端皆耦接第二子畫素45之子畫素電極，即與液晶電容48電性耦接，且儲存電容47之另一端耦接上一列掃描線15。如圖所示，位於第N+1列掃描線15之第二子畫素45之儲存電容47耦接於第N列掃描線15。The pixels 40 are arranged in a matrix, and each of the pixels 40 is provided with a plurality of sub-pixels. In this embodiment, the pixel 40 is provided with a first sub-pixel 41 and a second sub-pixel 45, wherein the first sub-pixel 41 and the second sub-pixel 45 are each provided with a switching element 42, 46, and a storage unit. Capacitors 43, 47 and a liquid crystal capacitor 44, 48. The switching elements 42 and 46 can be transistors, and the gates are respectively coupled to a scan line 15 and receive the scan signal to be turned on. In addition, the sources of the switching elements 42 and 46 are coupled to a data line 25, and receive the data signal when turned on. The drain of the switching element 42 and the storage capacitor 43 are coupled to the sub-pixel electrode of the first sub-pixel 41, wherein the pixel electrode is one end of the liquid crystal capacitor 44, and the other end of the storage capacitor 43 is coupled to the scan of the previous column. The line 15, for example, the storage capacitor 43 of the first sub-pixel 41 located on the scan line 15 of the Nth column is coupled to the N-1th column scan line 15. The same as the above, the drain of the second sub-pixel 45 and the storage capacitor 47 are coupled to the sub-pixel electrode of the second sub-pixel 45, that is, electrically coupled to the liquid crystal capacitor 48, and the storage capacitor. The other end of 47 is coupled to the upper column of scan lines 15. As shown, the storage capacitor 47 of the second sub-pixel 45 located on the scan line 15 of the (N+1)th column is coupled to the Nth column of scan lines 15.
根據本發明之實施例，每一畫素40分割成複數子畫素41、45，並分別將每一子畫素41、45之儲存電容43、47耦接於所對應之上一列的掃描線15，也就是耦接於其他列之掃描線15。如第一圖所示，位於第N列掃描線15的儲存電容43耦接於第N-1列掃描線15，位於第N+1列掃描線15之儲存電容47則耦接於第N列掃描線15。如此，儲存電容43、47之位準會在開關元件42、46接收掃描訊號時，受到所對應之上一列掃描線15的驅動訊號影響而改變子畫素41、45之子畫素電極的位準。所以，本發明之掃描驅動器10藉由傳送具有複數階位準(level)之掃描訊號，以調變子畫素41、45之儲存電容43、47之位準，進而影響子畫素41、45之子畫素電極的位準，以讓同一畫素40之子畫素41、45具有不同位準，如此子畫素41、45即會產生不同電場而作用於子畫素41、45區域內之液晶，也就是子畫素41、45區域內之液晶會偏轉不同角度，故畫素40區域內之液晶即會偏轉不同角度，所以於任一視角觀看畫面時，即可避免或緩和離軸色偏之現象，進而提高液晶顯示器之顯示效能。According to an embodiment of the present invention, each pixel 40 is divided into a plurality of sub-pixels 41 and 45, and the storage capacitors 43 and 47 of each of the sub-pixels 41 and 45 are respectively coupled to the scan lines of the corresponding upper column. 15, that is, the scan line 15 coupled to the other columns. As shown in the first figure, the storage capacitor 43 of the Nth column scan line 15 is coupled to the N-1th column scan line 15, and the storage capacitor 47 of the (N+1th column) scan line 15 is coupled to the Nth column. Scan line 15. Thus, the levels of the storage capacitors 43 and 47 change the level of the sub-pixels of the sub-pixels 41 and 45 when the switching elements 42 and 46 receive the scanning signals, and are affected by the driving signals of the corresponding one of the scanning lines 15 . . Therefore, the scan driver 10 of the present invention transmits the scan signals having a complex level to adjust the levels of the storage capacitors 43, 47 of the sub-pixels 41 and 45, thereby affecting the sub-pixels 41 and 45. The position of the sub-pixels of the sub-pixels is such that the sub-pixels 41 and 45 of the same pixel 40 have different levels, so that the sub-pixels 41 and 45 generate different electric fields and act on the liquid crystals in the sub-pixels 41 and 45 regions. That is, the liquid crystals in the sub-pixels 41 and 45 are deflected at different angles, so the liquid crystal in the region of the pixel 40 is deflected at different angles, so that the off-axis color shift can be avoided or moderated when viewing the image from any viewing angle. The phenomenon, thereby improving the display performance of the liquid crystal display.
第二圖為本發明之一實施例之掃描訊號之波形圖。如圖所示，第N-1列掃描線15的掃描訊號具三階位準，其分別為Vgh、Vgc1與Vg1，第N列掃描線15的掃描訊號亦具三階位準，其分別為Vgh、Vgc2與Vg1，而第N+1列掃描線15的掃描訊號同於第N-1列掃描線15的掃描訊號，同理，第N+2列掃描線15的掃描訊號同於第N列掃描線15的掃描訊號。由於位於第N列掃描線15之第一子畫素41的儲存電容43耦接於第N-1列掃描線15，所以第一子畫素41之位準會受第N-1列掃描線15之掃描訊號影響。當第一子畫素41之開關元件42接收之掃描訊號的位準由Vg1上升至Vgh時，儲存電容43即會開始充電而第一子畫素41之位準即會上升。The second figure is a waveform diagram of a scan signal according to an embodiment of the present invention. As shown in the figure, the scan signals of the scan lines 15 of the N-1th column have third-order levels, which are Vgh, Vgc1, and Vg1, respectively, and the scan signals of the scan lines 15 of the Nth column also have third-order levels, which are respectively Vgh, Vgc2, and Vg1, and the scanning signal of the (N+1)th scanning line 15 is the same as the scanning signal of the scanning line 15 of the N-1th column. Similarly, the scanning signal of the scanning line 15 of the N+2th column is the same as the Nth. The scan signal of the column scan line 15. Since the storage capacitor 43 of the first sub-pixel 41 located in the scan line 15 of the Nth column is coupled to the N-1th column scan line 15, the level of the first sub-pixel 41 is affected by the scan line of the N-1th column. 15 scan signals affected. When the level of the scanning signal received by the switching element 42 of the first sub-pixel 41 rises from Vg1 to Vgh, the storage capacitor 43 starts to charge and the level of the first sub-pixel 41 rises.
當掃描訊號之位準由Vgh下降至Vgc2時，儲存電容43之位準即會下降而第一子畫素41之位準會隨著下降，且受第N-1列掃描線15之掃描訊號的位準Vgc1影響而下降。之後，第一子畫素41之位準會隨著第N-1列掃描線15之掃描訊號的位準由Vgc1上升至Vg1而上升。最後，第一子畫素41之位準會隨著第N列掃描線15之掃描訊號的位準由Vgc2下降至Vg1而下降。由上述可知，位於第N列掃描線15之第一子畫素41的位準差為∣Vgc1-Vg1∣。When the level of the scanning signal is lowered from Vgh to Vgc2, the level of the storage capacitor 43 is lowered and the level of the first sub-pixel 41 is decreased, and the scanning signal of the scanning line 15 of the N-1th column is received. The level of Vgc1 is affected and decreases. Thereafter, the level of the first sub-pixel 41 rises as Vgc1 rises to Vg1 as the level of the scanning signal of the scanning line 15 of the N-1th column rises. Finally, the level of the first sub-pixel 41 decreases as Vgc2 falls to Vg1 as the level of the scanning signal of the Nth column of scanning lines 15 decreases. As can be seen from the above, the level difference of the first sub-pixel 41 located on the scanning line 15 of the Nth column is ∣Vgc1 - Vg1∣.
同理，位於第N+1列掃描線15之第二子畫素45的儲存電容47之位準會受到第N列掃描線15之掃描訊號影響，而第二子畫素45之位準會隨之受到影響。如圖所示，第二子畫素45的位準差為∣Vgc2-Vg1∣。由於第N-1列掃描線15與第N列掃描線15之掃描訊號有所差異，所以位於第N列掃描線15之第一子畫素41與位於第N+1列掃描線15之第二子畫素45的位準即會有所差異，而達到本發明之目的。此外，根據本發明，第一子畫素41的位準差大於第二子畫素45的位準差，也就是∣Vgc1-Vg1∣＞∣Vgc2-Vg1∣。另外，由於液晶之特性，相同位置之液晶所受之電場必須如同交流電般變化才可避免液晶壽命減短，所以本發明之掃描訊號會隨著畫面(frame)變動而相反。如圖所示，每一列掃描線15的掃描訊號在第一畫面與第二畫面之差異為相反，就如同交流電般變化。Similarly, the position of the storage capacitor 47 of the second sub-pixel 45 located on the scanning line 15 of the (N+1)th column is affected by the scanning signal of the scanning line 15 of the Nth column, and the level of the second sub-pixel 45 is It is affected accordingly. As shown, the second sub-pixel 45 has a level difference of ∣Vgc2-Vg1∣. Since the scan signals of the N-1th column scan line 15 and the Nth column scan line 15 are different, the first sub-pixel 41 located in the Nth column scan line 15 and the (N+1th column scan line 15) The level of the two sub-pixels 45 will be different to achieve the object of the present invention. Further, according to the present invention, the level difference of the first sub-pixel 41 is larger than the level difference of the second sub-pixel 45, that is, ∣Vgc1 - Vg1 ∣ > ∣ Vgc2 - Vg1 ∣. In addition, due to the characteristics of the liquid crystal, the electric field received by the liquid crystal at the same position must be changed like the alternating current to avoid the shortening of the life of the liquid crystal. Therefore, the scanning signal of the present invention is reversed as the frame changes. As shown, the scan signal of each column of scan lines 15 is opposite to the difference between the first picture and the second picture, as if it were alternating current.
第三圖至第六圖為本發明之掃描訊號之其它較佳實施例。第三圖之第N列掃描線15的掃描訊號具二階位準，其為Vgh與Vg1。由圖示可知，位於第N+1列掃描線15的第二子畫素45之位準差為0，而位於第N列掃描線15之第一子畫素41的位準差仍為∣Vgc1-Vg1∣，所以第一子畫素41之位準差大於第二子畫素45的位準差。第四圖實施例之掃描訊號皆具四階位準。第N-1列掃描線15之掃描訊號的位準為Vgh、Vgc1、Vgc3與Vg1，而第N列掃描線15之掃描訊號的位準為Vgh、Vgc2、Vgc4與Vg1。位於第N列掃描線15之第一子畫素41的位準差為∣Vgc1-Vg1∣，而位於第N+1列掃描線15之第二子畫素45的位準差為∣Vgc2-Vg1∣，且∣Vgc1-Vg1∣＞∣Vgc2-Vg1∣。The third to sixth figures are other preferred embodiments of the scanning signal of the present invention. The scanning signals of the scanning line 15 of the Nth column of the third figure have second-order levels, which are Vgh and Vg1. As can be seen from the figure, the second sub-pixel 45 of the scan line 15 of the N+1th column has a bit difference of 0, and the position of the first sub-pixel 41 of the N-th column of the scan line 15 is still ∣. Vgc1-Vg1∣, so the bit difference of the first sub-pixel 41 is larger than the level difference of the second sub-pixel 45. The scanning signals of the fourth embodiment have four levels. The scanning signals of the scanning line 15 of the N-1th column have the levels of Vgh, Vgc1, Vgc3 and Vg1, and the scanning signals of the scanning line 15 of the Nth column have the levels of Vgh, Vgc2, Vgc4 and Vg1. The position difference of the first sub-pixel 41 located on the scanning line 15 of the Nth column is ∣Vgc1 - Vg1 ∣, and the level difference of the second sub-pixel 45 located at the scanning line 15 of the (N+1)th column is ∣Vgc2- Vg1∣, and ∣Vgc1-Vg1∣>∣Vgc2-Vg1∣.
第五圖實施例之第N列掃描線15之掃描訊號具有三階位準，其為Vgh、Vgc2與Vg1。位於第N+1列掃描線15之第二子畫素45的位準差為∣Vgc2-Vg1∣，而位於第N列掃描線15之第一子畫素41的位準差與上一實施例相同，且∣Vgc1-Vg1∣＞∣Vgc2-Vg1∣。第六圖實施例之第N列掃描線15之掃描訊號僅具有二階位準，其為Vgh與Vg1。位於第N+1列掃描線15之第二子畫素45的位準差為0，而位於第N列掃描線15之第一子畫素41的位準差與上一實施例相同，所以第一子畫素41的位準差大於第二子畫素45的位準差。The scan signal of the Nth column scan line 15 of the fifth embodiment has a third order, which is Vgh, Vgc2 and Vg1. The position difference of the second sub-pixel 45 located on the scanning line 15 of the N+1th column is ∣Vgc2-Vg1∣, and the level difference of the first sub-pixel 41 located in the scanning line 15 of the Nth column is the same as the previous implementation. The same is true, and ∣Vgc1-Vg1∣>∣Vgc2-Vg1∣. The scan signal of the Nth column scan line 15 of the sixth embodiment has only the second order, which is Vgh and Vg1. The bit difference of the second sub-pixel 45 located on the scanning line 15 of the (N+1)th column is 0, and the level difference of the first sub-pixel 41 of the scanning line 15 of the Nth column is the same as that of the previous embodiment, so The level difference of the first sub-pixel 41 is greater than the level difference of the second sub-pixel 45.
第七圖係本發明之另一較佳實施例的電路圖。如圖所示，此實施例之第二子畫素45之儲存電容47耦接於一共同電極Vcom，如此第二子畫素45之位準將不會調變，但是由於第一子畫素41之位準仍會受上一列掃描線15之掃描訊號調變，所以第一子畫素41與第二子畫素45之位準仍會有所差異，故亦可使畫素40之子畫素41、45區域內之液晶偏轉不同角度而解決離軸色偏現象。由第一圖與第七圖實施例可得知，本發明除了此兩種實施方式外，亦可將第一子畫素41之儲存電容43耦接於共同電極Vcom，而第二子畫素45之儲存電容47耦接於下一列掃描線15，或者將第一子畫素41與第二子畫素45之儲存電容43、47分別耦接於所對應之下一列掃描線15，甚至是可將第一子畫素41之儲存電容43耦接於上一列掃描線15，而第二子畫素45之儲存電容47耦接於下一列掃描線15，也就是耦接於其他列之掃描線15。Figure 7 is a circuit diagram of another preferred embodiment of the present invention. As shown in the figure, the storage capacitor 47 of the second sub-pixel 45 of this embodiment is coupled to a common electrode Vcom, so that the level of the second sub-pixel 45 will not be modulated, but because the first sub-pixel 41 The level of the first sub-pixel 41 and the second sub-pixel 45 will still be different, so the sub-pixel of the pixel 40 can also be changed. The liquid crystals in the 41 and 45 regions are deflected at different angles to solve the off-axis color shift phenomenon. It can be seen from the first and seventh embodiments that the storage capacitor 43 of the first sub-pixel 41 can be coupled to the common electrode Vcom, and the second sub-pixel, in addition to the two embodiments. The storage capacitors 47 of the 45 are coupled to the next column of scan lines 15, or the storage capacitors 43 and 47 of the first sub-pixel 41 and the second sub-pixel 45 are respectively coupled to the corresponding column of scan lines 15 or even The storage capacitor 43 of the first sub-pixel 41 can be coupled to the scan line 15 of the previous column, and the storage capacitor 47 of the second sub-pixel 45 is coupled to the scan line 15 of the next column, that is, the scan coupled to other columns. Line 15.
第八圖係本發明之另一較佳實施例的電路圖。如圖所示，此實施例之每一畫素40的子畫素41、45的開關元件42、46耦接於相同之掃描線15，如此可減少掃描線15的數量而降低成本。此外，第一子畫素41之儲存電容43耦接於上一列掃描線15，而第二子畫素45之儲存電容47則耦接於下一列掃描線15，且第一子畫素41之開關元件42耦接資料線25，而第二子畫素45之開關元件46則與開關元件42電性耦接，如此資料訊號會透過第一子畫素41之開關元件42而傳送至第二子畫素45之開關元件46，即開關元件42、46同等於耦接相同之資料線25。由上述可得知，畫素40之子畫素41、45之位準將會分別受上一列掃描線15與下一列掃描線15之掃描訊號調變而產生位準差異，使得子畫素41、45之位準不相同，以避免發生離軸色偏現象。Figure 8 is a circuit diagram of another preferred embodiment of the present invention. As shown, the switching elements 42, 46 of the sub-pixels 41, 45 of each pixel 40 of this embodiment are coupled to the same scan line 15, which can reduce the number of scan lines 15 and reduce the cost. In addition, the storage capacitor 43 of the first sub-pixel 41 is coupled to the scan line 15 of the previous column, and the storage capacitor 47 of the second sub-pixel 45 is coupled to the scan line 15 of the next column, and the first sub-pixel 41 The switching element 42 is coupled to the data line 25, and the switching element 46 of the second sub-pixel 45 is electrically coupled to the switching element 42. The data signal is transmitted to the second through the switching element 42 of the first sub-pixel 41. The switching elements 46 of the sub-pixels 45, i.e., the switching elements 42, 46 are equally coupled to the same data line 25. It can be seen from the above that the positions of the sub-pixels 41 and 45 of the pixel 40 are respectively modulated by the scanning signals of the previous column of scan lines 15 and the next column of scan lines 15 to produce a level difference, so that the sub-pixels 41, 45 The level is not the same to avoid off-axis color shift.
第九圖為應用於第八圖實施例之掃描訊號的波形圖。如第九圖所示，掃描訊號皆具有四階位準，其分別為Vgh、Vgc1、Vgc2與Vg1。以位於第N列掃描線15之畫素40為例，當第N列掃描線15之掃描訊號的位準由Vgh下降至Vgc1時，第一子畫素41之位準將會受第N-1列掃描線15之掃描訊號調變，而第二子畫素45之位準將會受第N+1列掃描線15之掃描訊號調變。第十圖所示之掃描訊號亦應用於第八圖實施例，第十圖實施例不同於第九圖實施例在於第十圖實施例之掃描訊號皆具有三階位準，其分別為Vgh、Vgc1與、Vgc2。The ninth drawing is a waveform diagram of the scanning signal applied to the embodiment of the eighth embodiment. As shown in the ninth figure, the scan signals have fourth-order levels, which are Vgh, Vgc1, Vgc2, and Vg1, respectively. Taking the pixel 40 located on the scanning line 15 of the Nth column as an example, when the level of the scanning signal of the scanning line 15 of the Nth column is lowered from Vgh to Vgc1, the level of the first sub-pixel 41 will be affected by the N-1th. The scan signal of the column scan line 15 is modulated, and the level of the second sub-pixel 45 is modulated by the scan signal of the scan line 15 of the (N+1)th column. The scanning signal shown in the tenth embodiment is also applied to the eighth embodiment. The tenth embodiment is different from the ninth embodiment. The scanning signals in the tenth embodiment have third-order levels, which are Vgh, respectively. Vgc1 and Vgc2.
第八圖所繪示的實施例亦可將第二子畫素45之儲存電容47耦接於共同電極Vcom而不調變，第一子畫素41之儲存電容43仍耦接於上一列掃瞄線15而調變，或者是將第一子畫素41之儲存電容43耦接於共同電極Vcom而不調變，第二子畫素45之儲存電容47仍耦接於下一列掃瞄線15而調變。此外，第八圖所示實施例之第N列的第一子畫素41與第二子畫素45之儲存電容43、47可分別耦接於第N+1列與第N+2列之掃描線15，或者第N列之第一子畫素41與第二子畫素45之儲存電容43、47分別耦接於第N-1列與第N-2列之掃描線15。The embodiment shown in FIG. 8 can also couple the storage capacitor 47 of the second sub-pixel 45 to the common electrode Vcom without being modulated. The storage capacitor 43 of the first sub-pixel 41 is still coupled to the previous column scan. The line 15 is modulated, or the storage capacitor 43 of the first sub-pixel 41 is coupled to the common electrode Vcom without being modulated, and the storage capacitor 47 of the second sub-pixel 45 is still coupled to the next column of scan lines 15 Modulation. In addition, the storage capacitors 43, 47 of the first sub-pixel 41 and the second sub-pixel 45 in the Nth column of the embodiment shown in FIG. 8 can be respectively coupled to the N+1th column and the N+2th column. The scan lines 15, or the storage capacitors 43, 47 of the first sub-pixel 41 and the second sub-pixel 45 of the Nth column are respectively coupled to the scan lines 15 of the N-1th column and the N-2th column.
第十一圖為第八圖實施例之佈局圖。為了避免如第八圖所示之電路，第二子畫素45之儲存電容47於耦接至下一列掃描線15時，必須跨越本身所位在的掃描線15，所以將畫素40設計為呈型，而第一子畫素41與第二子畫素45分別呈、型。第二子畫素45耦接於第一子畫素41之兩三角形之間而呈型。掃描線15設計為呈ㄈ型，且偶數列與奇數列之掃描線15分別位於液晶顯示器之兩側，且ㄈ型之開口相對。如此，ㄈ型掃描線15之下方橫向直線可耦接畫素40的下方，而耦接第一子畫素41與第二子畫素45的開關元件42、46，並且可橫跨下一列之畫素40的上方，而耦接畫素40之第一子畫素41之儲存電容43。另外，ㄈ型掃描線15之上方橫向直線可橫跨上一列之畫素40的中間部份，而耦接上一列之畫素40之第二子畫素45之儲存電容47。藉由上述說明與圖示可知，這樣的佈局設計即可讓畫素40之子畫素41、45之儲存電容43、47不用跨越本身所位在的掃描線15，即可分別與上一列掃描線15和下一列掃描線15耦接。Figure 11 is a layout view of the eighth embodiment. In order to avoid the circuit as shown in the eighth figure, the storage capacitor 47 of the second sub-pixel 45 must be connected to the scan line 15 where it is located when it is coupled to the next column of scan lines 15, so the pixel 40 is designed as Present Type, and the first sub-pixel 41 and the second sub-pixel 45 are respectively , type. The second sub-pixel 45 is coupled between the two triangles of the first sub-pixel 41 type. The scan line 15 is designed to be of a ㄈ type, and the scan lines 15 of the even and odd columns are respectively located on both sides of the liquid crystal display, and the openings of the ㄈ type are opposite. Thus, the lower lateral line of the scan line 15 can be coupled to the lower side of the pixel 40, and the first sub-pixel 41 and the second sub-pixel 45 are coupled to the switching elements 42, 46, and can span the next column. Above the pixel 40, the storage capacitor 43 of the first sub-pixel 41 of the pixel 40 is coupled. In addition, the horizontal straight line above the scan line 15 can span the middle portion of the pixel 40 of the previous column, and is coupled to the storage capacitor 47 of the second sub-pixel 45 of the pixel 40 of the previous column. As can be seen from the above description and the illustration, such a layout design allows the storage capacitors 43 and 47 of the sub-pixels 41 and 45 of the pixel 40 to be separated from the scan line 15 of the previous column. 15 is coupled to the next column of scan lines 15.
第十二圖為應用於第八圖實施例之佈局圖。此實施例之子畫素41、45之開關元件42、46皆與資料線25耦接，並且子畫素41、45與掃描線15之型式皆不同於第十一圖實施例。此實施例之子畫素41、45皆為矩形，且第一子畫素41與第二子畫素45呈上下排列，第一子畫素41位於第二子畫素45上方。此外，掃描線15為鋸齒形掃描線，皆呈型，第一子畫素41位於鋸齒形掃描線15的上方橫向直線與中間橫向直線之間，第二子畫素45則位於型掃描線15的中間橫向直線與下方橫向直線之間，第一子畫素41與第二子畫素45之開關元件42、46耦接於型掃描線15的中間橫向直線並耦接資料線25。此外，鋸齒形掃描線15的上方橫向直線橫跨上一列之第二子畫素45而耦接儲存電容47，而下方橫向直線則橫跨下一列之第一子畫素41而耦接儲存電容43。Fig. 12 is a layout view applied to the embodiment of the eighth embodiment. The switching elements 42, 46 of the sub-pixels 41, 45 of this embodiment are all coupled to the data line 25, and the patterns of the sub-pixels 41, 45 and the scanning line 15 are different from those of the eleventh embodiment. The sub-pixels 41 and 45 of this embodiment are all rectangular, and the first sub-pixel 41 and the second sub-pixel 45 are arranged up and down, and the first sub-pixel 41 is located above the second sub-pixel 45. In addition, the scan line 15 is a zigzag scan line, both of which are Type, the first sub-pixel 41 is located between the horizontal straight line and the middle horizontal straight line above the zigzag scanning line 15, and the second sub-pixel 45 is located Between the middle lateral straight line of the scanning line 15 and the lower horizontal straight line, the first sub-pixel 41 and the switching elements 42 and 46 of the second sub-pixel 45 are coupled to The middle of the scanning line 15 is laterally straight and coupled to the data line 25. In addition, the upper horizontal straight line of the zigzag scanning line 15 is coupled to the storage capacitor 47 via the second sub-pixel 45 of the previous column, and the lower horizontal line is coupled to the storage capacitor by the first sub-pixel 41 of the next column. 43.
綜上所述，本發明液晶顯示器及其驅動方法，主要係藉由將每一畫素分割成複數子畫素，並讓該等子畫素之該等儲存電容分別耦接於和該等子畫素不同列之掃描線，或者讓該等子畫素之其中一者的儲存電容耦接於共同電極，而其餘子畫素之儲存電容耦接於和子畫素不同列的掃描線，此外配合具有複數階位準之掃描訊號，即可讓畫素之至少一子畫素的子畫素電極位準受到調變，以讓同一畫素內之子畫素分別具不同位準，而提供該等子畫素具不同電場強度，用於驅使每一畫素之該等子畫素的液晶偏轉不同傾角而具不同穿透率，如此即可避免於不同視角觀看液晶顯示器之畫面時，產生亮度與色彩失真之現象，而提高液晶顯示器之顯示效能。In summary, the liquid crystal display of the present invention and the driving method thereof are mainly characterized in that each pixel is divided into a plurality of pixels, and the storage capacitors of the sub-pixels are respectively coupled to the sub-pixels. The scan lines of the different columns are arranged, or the storage capacitors of one of the sub-pixels are coupled to the common electrode, and the storage capacitors of the remaining sub-pixels are coupled to the scan lines of the different columns of the sub-pixels. A scanning signal having a complex order level allows the sub-pixel electrode level of at least one sub-pixel of the pixel to be modulated so that the sub-pixels in the same pixel have different levels, respectively. The sub-pictures have different electric field strengths, which are used to drive the liquid crystals of the sub-pixels of each pixel to have different tilt angles and different transmittances, so as to avoid brightness and brightness when viewing the picture of the liquid crystal display from different viewing angles. The phenomenon of color distortion improves the display performance of the liquid crystal display.
雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作些許之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.
1．．．液晶顯示器1. . . LCD Monitor
10．．．掃描驅動器10. . . Scan drive
15．．．掃描線15. . . Scanning line
20．．．資料驅動器20. . . Data driver
25．．．資料線25. . . Data line
30．．．時序控制器30. . . Timing controller
40．．．畫素40. . . Pixel
41．．．第一子畫素41. . . First subpixel
42．．．開關元件42. . . Switching element
43．．．儲存電容43. . . Storage capacitor
44．．．液晶電容44. . . Liquid crystal capacitor
45．．．第二子畫素45. . . Second subpixel
46．．．開關元件46. . . Switching element
47．．．儲存電容47. . . Storage capacitor
48．．．液晶電容48. . . Liquid crystal capacitor
Vcom．．．共同電極Vcom. . . Common electrode
第一圖係本發明之一較佳實施例的電路圖；The first figure is a circuit diagram of a preferred embodiment of the present invention;
第二圖係根據本發明繪示掃描訊號之波形圖；The second figure is a waveform diagram of a scanning signal according to the present invention;
第三圖係根據本發明繪示掃描訊號之另一波形圖；The third figure shows another waveform diagram of the scanning signal according to the present invention;
第四圖係根據本發明繪示掃描訊號之另一波形圖；The fourth figure is another waveform diagram of the scan signal according to the present invention;
第五圖係根據本發明繪示掃描訊號之另一波形圖；The fifth figure shows another waveform diagram of the scanning signal according to the present invention;
第六圖係根據本發明繪示掃描訊號之另一波形圖；Figure 6 is a diagram showing another waveform of a scanning signal according to the present invention;
第七圖係本發明之另一較佳實施例的電路圖；Figure 7 is a circuit diagram of another preferred embodiment of the present invention;
第八圖係本發明之又一較佳實施例的電路圖；Figure 8 is a circuit diagram of still another preferred embodiment of the present invention;
第九圖係根據本發明繪示掃描訊號之另一波形圖；The ninth drawing is another waveform diagram of the scanning signal according to the present invention;
第十圖係根據本發明繪示掃描訊號之另一波形圖；The tenth figure shows another waveform diagram of the scanning signal according to the present invention;
第十一圖係本發明之一較佳實施例的佈局圖；以及11 is a layout view of a preferred embodiment of the present invention;
第十二圖係本發明之另一較佳實施例的佈局圖。Figure 12 is a layout view of another preferred embodiment of the present invention.
1．．．液晶顯示器1. . . LCD Monitor
10．．．掃描驅動器10. . . Scan drive
15．．．掃描線15. . . Scanning line
20．．．資料驅動器20. . . Data driver
25．．．資料線25. . . Data line
30．．．時序控制器30. . . Timing controller
40．．．畫素40. . . Pixel
41．．．第一子畫素41. . . First subpixel
42．．．開關元件42. . . Switching element
43．．．儲存電容43. . . Storage capacitor
44．．．液晶電容44. . . Liquid crystal capacitor
45．．．第二子畫素45. . . Second subpixel
46．．．開關元件46. . . Switching element
47．．．儲存電容47. . . Storage capacitor
48．．．液晶電容48. . . Liquid crystal capacitor
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101103700A TWI551929B (en) | 2007-07-26 | 2007-07-26 | A liquid crystal display and a driving method thereof are provided |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101103700A TWI551929B (en) | 2007-07-26 | 2007-07-26 | A liquid crystal display and a driving method thereof are provided |
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| TW201224619A TW201224619A (en) | 2012-06-16 |
| TWI551929B true TWI551929B (en) | 2016-10-01 |
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| TW101103700A TWI551929B (en) | 2007-07-26 | 2007-07-26 | A liquid crystal display and a driving method thereof are provided |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW287269B (en) * | 1994-09-21 | 1996-10-01 | Matsushita Electric Ind Co Ltd | |
| JPH11352464A (en) * | 1998-06-08 | 1999-12-24 | Texas Instr Japan Ltd | Liquid crystal display device and liquid crystal panel |
| JP2002287717A (en) * | 2001-03-28 | 2002-10-04 | Seiko Epson Corp | Electrooptical device, driving method thereof, and electronic equipment and projection type display device provided therewith |
| TW200702853A (en) * | 2005-07-07 | 2007-01-16 | Au Optronics Corp | Liquid crystal display devices |
-
2007
- 2007-07-26 TW TW101103700A patent/TWI551929B/en active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW287269B (en) * | 1994-09-21 | 1996-10-01 | Matsushita Electric Ind Co Ltd | |
| JPH11352464A (en) * | 1998-06-08 | 1999-12-24 | Texas Instr Japan Ltd | Liquid crystal display device and liquid crystal panel |
| JP2002287717A (en) * | 2001-03-28 | 2002-10-04 | Seiko Epson Corp | Electrooptical device, driving method thereof, and electronic equipment and projection type display device provided therewith |
| TW200702853A (en) * | 2005-07-07 | 2007-01-16 | Au Optronics Corp | Liquid crystal display devices |
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| TW201224619A (en) | 2012-06-16 |
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