Abstract:
An LCD with two-dot inversion includes plural gate lines for transmitting gate driving signals, plural data lines for transmitting data driving signals, and a pixel array. The pixel array includes plural pixels. The plural pixels display frames according to the received gate driving signals and data driving signals. A first data line of the plural data lines is coupled to a first column of pixels and a second column of pixels. The plural data lines are curves with several bends. The difference between the numbers of the first and the second columns is at least two.

Description:
BACKGROUND OF THE INVENTION  
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a Liquid Crystal Display (LCD), and more particularly, to an LCD with two-dot inversion capable of saving power consumption. 
         [0003]    2. Description of the Prior Art 
         [0004]    Please refer to  FIG. 1 .  FIG. 1  is a diagram illustrating a conventional LCD  100 . As shown in  FIG. 1 , The LCD  100  comprises a gate driving circuit  110 , a data driving circuit  120  and a pixel area  130 . 
         [0005]    The gate driving circuit  110  comprises a plurality of gate lines G 1 ˜G N  for generating gate driving signals S G1 ˜S GN  in order. The data driving circuit  120  comprises a plurality of data lines D 1 ˜D M  for generating data driving signals S D1 ˜S DM . Each of the gate lines G 1 ˜G N  is a straight line parallel with each other and each of the data line D 1 ˜D M  is a straight line parallel with each other. The pixel area  130  comprises a pixel array with M columns and N rows. The pixel array comprises (M×N) pixels P 11 ˜P MN . The pixels of the pixel array are interwoven by the gate lines G 1 ˜G N  across the data lines D 1 ˜D M  and are driven by the gate driving signals generated by the corresponding gate lines for receiving the data driving signals generated by the corresponding data lines. For example, when the pixel P 11  receives the gate driving signal S G1 , the pixel P 11  receives the data signal S D1  so as to display the image. When the pixel P 12  receives the gate driving signal S G2 , the pixel P 12  receives the data signal S D1  so as to display the image. When the pixel P 21  receives the gate driving signal S G1 , the pixel P 21  receives the data signal S D2  so as to display the image. When the pixel P 22  receives the gate driving signal S G2 , the pixel P 22  receives the data signal S D2  so as to display the image, and so on. 
         [0006]    Please refer to  FIG.2  and  FIG. 3  together.  FIG. 2  and  FIG. 3  are diagrams illustrating the conventional LCD  100  displaying images by dot inversion. In  FIG. 2  and  FIG. 3 , the frame X and the frame (X+1) represents two successive frames. That is, the LCD  100  displays the frame (X+1) right after the frame X. As shown in  FIG. 2  and  FIG. 3 , for the frames X and (X+1) having the characteristic of dot inversion, the polarity of the data driving signals carried by each data line have to be inverted (from positive to negative or from negative to positive) every time a gate driving signal passes by and the polarities of the data driving signals carried by the adjacent data lines are opposite to each other. For example, in the frame X, the polarity of the data driving signal S D1  during the interval of the gate driving signal S G1  is positive so that the display polarity of the pixel P 11  is positive. The polarity of the data driving signal S D1  during the interval of the gate driving signal S G2  is negative so that the display polarity of the pixel P 12  is negative. The data driving signal S D1  during the interval of the gate driving signal S G3  is positive so that the display polarity of the pixel P 13  is positive. The data driving signal S D1  during the interval of the gate driving signal S G4  is negative so that the display polarity of the pixel P 14  is negative. Relatively, the data driving signal S D2  carried by the data line D 2 , which is adjacent to the data line D 1 , is negative during the interval of the gate driving signal S G1  so that the display polarity of the pixel P 21  is negative. The data driving signal S D2  during the interval of the gate driving signal S G2  is positive so that the display polarity of the pixel P 22  is positive. The data driving signal S D2  during the interval of the gate driving signal S G3  is negative so that the display polarity of the pixel P 23  is negative. The data driving signal S D2  during the interval of the gate driving signal S G4  is positive so that the display polarity of the pixel P 24  is positive and so on. In such condition, the frame X having the characteristic of dot inversion is derived as shown in  FIG. 2 . In the frame (X+1) of  FIG. 3 , the polarities of all the data driving signals are inverted according to the polarities of all the data driving signals in the frame X and therefore the frame (X+1) having the characteristic of dot inversion is derived as shown in  FIG. 3 . 
         [0007]    However, in the conventional LCD  100 , since the gate lines are parallel with each other and the data lines are parallel with each other, and the gate lines are perpendicular across the data lines, for the purpose of displaying frame by dot inversion, the polarities of the data driving signals carried by the data lines have to be inverted every time a gate driving signal passes by, which causes too much power consumption and is quite inconvenient for the user. 
       SUMMARY OF THE INVENTION  
       [0008]    The present invention provides an LCD with two-dot inversion. The LCD comprises a plurality of gate lines, a plurality of data lines and a pixel array. The plurality of gate lines are utilized for transmitting gate driving signals. The plurality of data lines are utilized for transmitting data driving signals. The pixel array comprises a plurality of columns of pixels. Each row of the plurality of the columns of the pixels comprises a pixel so as to form the pixel array and the pixel array displays images according to the received gate driving signals and the received data driving signals. One of the plurality of the columns of the pixels is disposed between two adjacent gate lines and between two adjacent data lines. A first data line of the plurality of the data lines is coupled to pixels of a first column of a first pair of the plurality of the columns of the pixels and to pixels of a second column of a second pair of the plurality of the columns of the pixels, wherein the first column is separated from the second column by at least two columns. 
         [0009]    The present invention further provides an LCD with two-dot inversion capable of saving power consumption. The LCD comprises a first, a second, a third and a fourth gate lines, a first and a second data lines, and a pixel array. The first, the second, the third and the fourth gate lines are utilized for transmitting gate driving signals. The first and the second data lines are utilized for transmitting data driving signals. The pixel array comprises a first, a second, a third, a fourth, a fifth and a sixth pixels. The first pixel is disposed at a first row and a first column of the pixel array. The first pixel is coupled to the first gate line and the first data line for displaying images according to the received gate driving signals and the received data driving signals. The second pixel is disposed at the first row and a second column of the pixel array. The second pixel is coupled to the second gate line and the first data line for displaying the images according to the received gate driving signals and the received data driving signals. The third pixel is disposed at the first row and a third column of the pixel array. The third pixel is coupled to the first gate line and the second data line for displaying the images according to the received gate driving signals and the received data driving signals. The fourth pixel is disposed at the first row and a fourth column of the pixel array. The fourth pixel is coupled to the second gate line and the second data line for displaying the images according to the received gate driving signals and the received data driving signals. The fifth pixel is disposed at a second row and the third column of the pixel array. The fifth pixel is coupled to the third gate line and the first data line for displaying the images according to the received gate driving signals and the received data driving signals. The sixth pixel is disposed at the second row and the fourth column of the pixel array. The sixth pixel is coupled to the fourth gate line and the first data line for displaying the images according to the received gate driving signals and the received data driving signals. 
         [0010]    These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
         [0011]      FIG. 1  is a diagram illustrating a conventional Liquid Crystal Display (LCD). 
           [0012]      FIG. 2  and  FIG. 3  are diagrams illustrating the conventional LCD displaying images by dot inversion. 
           [0013]      FIG. 4  is a diagram illustrating the LCD of the first embodiment of the present invention. 
           [0014]      FIG. 5  and  FIG. 6  are diagrams illustrating the LCD of the present invention displaying the image by two-dot inversion. 
           [0015]      FIG. 7 ,  FIG. 8  and  FIG. 9  are diagrams illustrating the LCDs of the second, third and fourth embodiments of the present invention. 
       
    
    
     DETAILED DESCRIPTION  
       [0016]    Please refer to  FIG. 4 .  FIG. 4  is a diagram illustrating the LCD  400  of the first embodiment of the present invention. As shown in  FIG. 4 , the LCD  400  comprises a gate driving circuit  410 , a data driving circuit  420 , and a pixel area  430 . 
         [0017]    A gate driving circuit  410  comprises a plurality of gate lines G 1 ˜G N . The gate driving circuit  410  is utilized for sequentially generating the gate driving signals S G1 ˜S GN  and transmitting the gate driving signals S G1 ˜S GN  respectively through the gate lines G 1 ˜G N . The data driving circuit  420  comprises a plurality of data lines D 1 ˜D M . The data driving circuit  420  is utilized for generating the data driving signal S D1 ˜S DM  and transmitting the data driving signals S D1 ˜S DM  respectively through the data lines D 1 ˜D M . Each of the gate lines G 1 ˜G N  is a straight line parallel with each other. Each of the data line D 1 ˜D M  is designed as a curved line with a shape like the letter “S”. More particularly, the data lines designed by the present invention, in the pixel area  430 , are curved with several bends between the two corresponding pair of columns of pixels. For example, the data lines D 2  is disposed between the first column of pixels and the second column of pixels (the first pair of columns of pixels), and the third column of pixels and the fourth column of pixels (the second pair of columns of pixels). More particularly, in the first row of the pixel area  430 , the data line D 2  is disposed between the pixel P 11  and the pixel P 21  (the first pair of columns of pixels). In the second row of the pixel area  430 , the data line D 2  is curved between the pixel P 32  and the pixel P 42  (the second pair of columns of pixels). In the third row of pixel area  430 , the data line D 2  is curved back between the pixel P 13  and the pixel P 23  (the first pair of columns of pixels). In the fourth row of the pixel area  430 , the data line D 2  is curved again between the pixel P 34  and the pixel P 44  (the second pair of columns of pixels) (not shown), and so on. The data line D 3  is disposed in the pixel area  430  between the third and fourth columns of pixels (the first pair of columns of pixels) and the fifth and sixth columns of pixels (the second pair of columns of pixels). More precisely, in the first row of the pixel area  430 , the data line D 3  is disposed between the pixel P 31  and the pixel P 41  (the first pair of columns of pixels). In the second row of the pixel area  430 , the data line D 3  is curved between the pixel P 52  and the pixel P 62  (the second pair of columns of pixels). In the third row of pixel area  430 , the data line D 3  is curved back between the pixel P 33  and the pixel P 43  (the first pair of columns of pixels). In the fourth row of the pixel area  430 , the data line D 3  is curved again between the pixel P 54  and the pixel P 64  (the second pair of columns of pixels) (not shown), and so on. The rest data lines are disposed in the similar way and hereinafter will not be repeated again. 
         [0018]    The pixel area  430  comprises a pixel array with M columns and N rows. The pixel array comprises (M×N) pixels P 11 ˜P MN . The pixels of the pixel array are interwoven by the gate lines G 1 ˜G N  across the data lines D 1 ˜D M  and are driven by the gate driving signals generated by the corresponding gate lines for receiving the data driving signals generated by the corresponding data lines. For instance, the pixel P 11  is coupled to the gate line G 1  and the data line D 2 . When the pixel P 11  receives the gate driving signal S G1 , the pixel P 11  receives the data signal S D2  so as to display the image. The pixel P 21  is coupled to the gate line G 2  and the data line D 2 . When the pixel P 21  receives the gate driving signal S G2 , the pixel P 21  receives the data signal S D2  so as to display the image. The pixel P 12  is coupled to the gate line G 3  and the data line D 1 . When the pixel P 12  receives the gate driving signal S G3 , the pixel P 12  receives the data signal S D1  so as to display the image. The pixel P 22  is coupled to the gate line G 4  and the data line D 1 . When the pixel P 22  receives the gate driving signal S G4 , the pixel P 22  receives the data signal S D1  so as to display the image. The pixel P 31  is coupled to the gate line G 1  and the data line D 3 . When the pixel P 31  receives the gate driving signal S G1 , the pixel P 31  receives the data signal S D3  so as to display the image. The pixel P 41  is coupled to the gate line G 2  and the data line D 3 . When the pixel P 41  receives the gate driving signal S G2 , the pixel P 41  receives the data signal S D3  so as to display the image, and so on. The pixel P 32  is coupled to the gate line G 3  and the data line D 2 . When the pixel P 32  receives the gate driving signal S G3 , the pixel P 32  receives the data signal S D2  so as to display the image, and so on. In addition, each pixel (for example, the pixel P 32  and the Pixel P 42  of the  FIG. 4 ) comprises a pixel switch SW, a liquid crystal capacitor C LC  and a storage capacitor C ST . The pixel switch SW can be realized with a Thin Film Transistor (TFT), wherein the gate is the control end of the pixel switch. The control end C of the pixel switch SW of a pixel is coupled to the gate line corresponding to the pixel for receiving the corresponding gate driving signal. The first end  1  of the pixel switch SW is coupled to the data line corresponding to the pixel for receiving the corresponding data driving signal. The second end  2  of the pixel switch SW is coupled between the liquid crystal capacitor C LC  and the storage capacitor C ST . The liquid crystal capacitor C LC  and the storage capacitor C ST  are coupled between the second end  2  of the pixel switch SW and a common end. 
         [0019]    Please refer to  FIG. 5  and  FIG. 6  together.  FIG. 5  and  FIG. 6  are diagrams illustrating the LCD  400  of the present invention displaying images by two-dot inversion. In  FIG. 5  and  FIG. 6  the Frames X and (X+1) represent two successive frames. It means that the LCD  400  displays the frame (X+1) right after the frame X. As shown in  FIG. 5  and  FIG. 6 , for the frames X and (X+1) having the characteristic of two-dot inversion, the polarities of the data driving signals carried by the adjacent data lines are opposite to each other. Since the data lines designed by the present invention have the shape like the letter “S”, the polarities of the data driving signals carried by a single line does not have to be inverted within one frame so that the power consumption of the LCD  400  can be saved. For example, during the period of displaying the frame X, the polarity of the data driving signal S D2  on the data line D 2  keeps positive so as to make the display polarities of the pixels P 11 , P 21 , P 32 , P 42 , P 13  and P 23  positive. Relatively, the polarity of the data driving signal S D3 , which is carried by the data line D 3  adjacent to the data line D 2 , keeps negative so as to make the display polarities of the pixel P 31 , P 41 , P 12 , P 22 , P 33 , P 43  negative, and so on. In this way, the frame X with the characteristic of two-dot inversion as shown in the upper part of  FIG. 5  is derived. In the frame (X+1) of  FIG. 6 , the polarity of each data driving signal is inverted according to the polarity of the corresponding data driving signal so that the frame (X+1) with the characteristic of two-dot inversion as shown in the upper part of  FIG. 6  is derived. 
         [0020]    Please refer to  FIG. 7 ,  FIG. 8  and  FIG. 9 .  FIG. 7 ,  FIG. 8  and  FIG. 9  are diagrams illustrating the LCDs of the second, third and fourth embodiments of the present invention. The structures of the LCDs of  FIG. 7 ,  FIG. 8  and  FIG. 9  are similar to the LCD  400 . The differences between LCDs in  FIG. 4  and  FIG. 7 ,  FIG. 8 , and  FIG. 9  are that in  FIG. 4 , the pixels in the same column pairs are coupled to the gate lines in the same manner, but in  FIG. 7 ,  FIG. 8 , and  FIG. 9 , the manner of the pixels in the same column pairs being coupled to the gate lines are different. For example, in  FIG. 4 , the pixel P 11  is coupled to the gate line G 1 ; the pixel P 21  is coupled to the gate line G 2 ; the pixel P 12  is coupled to the gate line G 3 ; the pixel P 22  is coupled to the gate line G 4 ; the pixel P 13  is coupled to the gate line G 5 ; the pixel P 23  is coupled to the gate line G 6 . However, in  FIG. 7 , the pixel P 11 , P 21 , P 13 , and P 23  are coupled as the same as in  FIG. 4 , but the pixel P 12  is coupled to the gate line G 4 , and the pixel P 22  is coupled to the gate line G 3 . In  FIG. 9 , the pixel P 11  is coupled to the gate line G 2 ; the pixel P 21  is coupled to the gate line G 1 ; the pixel P 12  is coupled to the gate line G 4 ; the pixel P 22  is coupled to the gate line G 3 ; the pixel P 13  is coupled to the gate line G 6 ; the pixel P 23  is coupled to the gate line G 5 . In  FIG. 8 , the structure is quite similar to  FIG. 9 , and only the coupling for the pixels P 12  and P 22  is different: the pixel P 12  is coupled to the gate line G 3 ; the pixel P 22  is coupled to the gate line G 4 . The coupling of the pixels is designed to meet some particular requirement and thus the different structures of  FIG. 4 ,  FIG. 7 ,  FIG. 8 , and  FIG. 9  are consequently derived as desired. The related operation principle, as described above, is well-known to those skilled in the analogous art and will not be repeated again. 
         [0021]    In conclusion, in the LCD provided by the present invention, since the data lines in the pixel area have the shape like the letter “S”, the data driving signals on the data lines does not have to be inverted within one frame. In this way, the power consumption of the LCD is saved, causing a great convenience. 
         [0022]    Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention.