Abstract:
The present invention discloses an LCD device and related driving device and driving method. The driving method includes: obtaining an accumulated working time of the LCD device; obtaining a high reference voltage corresponding to the accumulated working time; utilizing the high reference voltage to drive the LCD device; making a multiplying product of a transmittance and a backlight magnitude of the LCD device remain equal or proximity. The present invention suppresses the backlight magnitude decrease phenomenon due to the long-used term of the LCD device such that the display quality can be improved.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The invention relates to a display and a related driving method, and more particularly, to an LCD device and a related driving method for driving the LCD device. 
         [0003]    2. Description of the Prior Art 
         [0004]    Over-driving technique is often used to improve the display quality of the LCD device. Conventionally, the over-driving technique is accomplished by looking up a table according to the previous and a current frame data to find out a predetermined interpolated voltage, and providing the over-driving voltage on the pixel to reduce the response time. 
         [0005]    However, a frame buffer is required to store the previous frame such that the previous frame can be compared with the current one. Furthermore, the above-mentioned predetermined interpolated voltages are also needed to be stored inside a storage device. Moreover, a timing controller (TCON) is also required. 
         [0006]    Please refer to  FIG. 1 , which depicts the over-driving function accomplished by a column-driving configuration. Here, the original signal is transformed from 1V (where the positive/negative voltages are respectively 6V and 4V) to 3V (where the positive/negative voltages are respectively 8V and 2V). In order to improve the response speed, a signal 5V (where the positive/negative voltages are respectively 10V and 0V) is often inserted into the original signal. When the voltage of the pixel changes from 1V to 3V, it needs one frame period to perform the charging operation such that a 5V voltage can be obtained. 
         [0007]    For PVA panel, because a high transmittance is required, each pitch between two adjacent grid electrodes of the pixel electrodes is designed to be greater. In this case, if only one set of interpolated voltages are recorded inside the look-up table, the liquid crystals may be driven instantly to rotate through an incorrect angle. This also introduces an overshooting phenomenon when the pixel is transformed from a low gray level to a high gray level such that the display quality is reduced. 
         [0008]    Therefore, an LCD device and a driving method for driving the LCD device are required to solve the above-mentioned problem. 
       SUMMARY OF THE INVENTION 
       [0009]    It is therefore one of the primary objectives of the claimed invention to provide an LCD device capable of performing the over-driving operation in one frame period. 
         [0010]    According to an exemplary embodiment of the claimed invention, an LCD device is disclosed. The LCD device comprises: a scan driving module, for generating scan signals; data driving module, for generating data signals; TFT array panel, having pixels, each of the pixels comprises a sub-pixel R, a sub-pixel G, and a sub-pixel B; scan lines, coupled to at least one sub-pixel of the pixels, for receiving the scan signals from the scan driving module to row-by-row scan the sub-pixels located on a same column; data lines, coupled to at least one sub-pixel of the pixels, for receiving the data signals from the data driving module, pre-charging the sub-pixel before transferring the data signals to the sub-pixel, and transferring the data signals to display an image; and common lines, coupled to at least one sub-pixel of the pixels, for providing a high voltage or a low voltage according to a polarity of the sub-pixel coupled to the common line; wherein the sub-pixels R, G and B are arranged in a horizontal direction or a vertical direction of a scanning direction of scanning the sub-pixels, the common line is orthogonal to the scanning direction of scanning the sub-pixels, and two adjacent pixels have opposite polarities. 
         [0011]    In the LCD device according to the present invention, each of the common lines is coupled to the sub-pixels having a same polarity. 
         [0012]    In the LCD device according to the present invention, each of the data lines is coupled to the sub-pixels having a same polarity. 
         [0013]    According to an exemplary embodiment of the claimed invention, an LCD device is disclosed. The LCD device comprises: a scan driving module, for generating scan signals; a data driving module, for generating data signals; a TFT array panel, having pixels, each of the pixels comprises a sub-pixel R, a sub-pixel G, and a sub-pixel B; scan lines, coupled to at least one sub-pixel of the pixels, for receiving scan signals from the scan driving module, to row-by-row scan the sub-pixels located on a same column; and data lines, coupled to at least one sub-pixel of the pixels, for receiving the data signals from the data driving module, pre-charging the sub-pixel before transferring the data signals to the sub-pixel, and transferring the data signals to display an image. 
         [0014]    In the LCD device according to the present invention, the LCD device further comprises common lines, coupled to at least one sub-pixel of the pixels, for providing a high voltage or a low voltage according to a polarity of the sub-pixel coupled to the common line. 
         [0015]    In the LCD device according to the present invention, the sub-pixels R, G and B are arranged in a horizontal direction of a scanning direction of scanning the sub-pixels. 
         [0016]    In the LCD device according to the present invention, the sub-pixels R, G and B are arranged in a vertical direction of a scanning direction of scanning the sub-pixels. 
         [0017]    In the LCD device according to the present invention, the common line is orthogonal to the scanning direction of scanning the sub-pixels. 
         [0018]    In the LCD device according to the present invention, two adjacent pixels have opposite polarities. 
         [0019]    In the LCD device according to the present invention, each of the common lines is coupled to the sub-pixels having a same polarity. 
         [0020]    In the LCD device according to the present invention, each of the data lines is coupled to the sub-pixels having a same polarity. 
         [0021]    According to an exemplary embodiment of the claimed invention, a driving method for driving an LCD device is disclosed. The LCD device comprises a scan driving module, a data driving module, a TFT array panel, scan lines, and data lines, the TFT array panel have pixels, each of the pixels comprises a sub-pixel R, a sub-pixel G, and a sub-pixel B, the driving method comprises: (A) utilizing the scan driving module to generate scan signals and transferring the scan signals to the scan lines; (B) utilizing the data driving module to generate data signal and transferring the data signals to the data lines; (C) utilizing the scan lines to transfer the scan signals to at least one sub-pixel of the pixels to row-by-row scan sub-pixels located in a same column; (D) utilizing the data lines to pre-charge at least one sub-pixel of the pixels, and to transfer the data signals to the sub-pixel in order to display an image. 
         [0022]    In the LCD device according to the present invention, the driving method comprises: (E) utilizing common lines to provide a high voltage or a low voltage to the sub-pixels coupled to the common lines. 
         [0023]    In contrast to the related art, the present invention does not need the frame buffer such that the cost is reduced. Furthermore, a complicated timing function is not required to perform the over-driving operation. Moreover, the pixels are not instantly driven to rotate through an incorrect angle if a prior art method of looking up tables to perform the over-driving operation. 
         [0024]    These and other objectives of the claimed 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 
         [0025]      FIG. 1  is a diagram showing an over-driving operation according to the prior art. 
           [0026]      FIG. 2  is a block diagram of an LCD device according to the present invention. 
           [0027]      FIG. 3  is a diagram showing a part of the LCD device according to a first embodiment according to the present invention. 
           [0028]      FIG. 4  is a diagram showing driving signals of the LCD device according to the present invention. 
           [0029]      FIG. 5  is a diagram showing a part of the LCD device according to a second embodiment according to the present invention. 
           [0030]      FIG. 6  is a diagram showing a part of the LCD device according to a third embodiment according to the present invention. 
           [0031]      FIG. 7  is a diagram showing a part of the LCD device according to a fourth embodiment according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0032]    In the following disclosure, units having similar function are labeled as the same number. 
         [0033]    The LCD device of the present invention utilizes a high voltage to charge pixels before the data signals are inputted into the pixels through the pre-charge operation and high/low level signals of the array common lines. This is equal to perform an over-driving operation before the data signals are inputted into the pixels. 
         [0034]    Please refer to  FIG. 2 , which is a block diagram of the LCD device according to the present invention. The LCD device comprises an scan driving module  204 , a data driving module  201 , a TFT array panel  202 , common lines  205 , scan lines (gate lines)  203 , and data lines  207 . In  FIG. 2 , the scan lines  203  and the data lines  207  are orthogonal. The TFT array panel  102  has pixels  206 . The pixel  206  comprises three sub-pixels (now shown). The scan driving module  204  is used to generate scan signals (gate signals) and transfer the scan signals to the scan lines  203 . The data driving module  201  is used to generate data signals and transfer the data signals to the data lines  207 . The scan lines  203  are coupled to the pixels  206 . To speak more specifically, each of the scan lines  203  is coupled to at least one sub-pixel of the pixel  206 . The data lines  207  are coupled to the pixels  206 . To speak more specifically, each of the scan lines  207  is coupled to at least one sub-pixel of the pixel  206 . The common lines  205  are coupled to the pixels  206 . To speak more specifically, each of the common lines  205  is coupled to at least one sub-pixel of the pixel  206 . 
         [0035]    Please refer to  FIG. 3  in conjunction with  FIG. 4 .  FIG. 3  is a part of the LCD device according to the first embodiment of the present invention.  FIG. 4  is a diagram showing driving signals of the LCD device according to the present invention. In this embodiment, tri-gate is composed of three sub-pixels (sub-pixel R, sub-pixel G, and sub-pixel B). The sub-pixels R, the sub-pixels G, and the sub-pixels B are respectively arranged parallel to the scanning direction. 
         [0036]    In this embodiment, the data line is designed according to the flip pixel configuration. That is, the data lines (including the data line  1  and the data line  2 ) are arranged along the arranging direction of the sub-pixels R, G, and B. In addition, each of the data lines is coupled to the first and last sub-pixels of a pixel and a middle sub-pixel of the pixel vertically next to the pixel. For example, the data line  1  is coupled to the sub-pixels R 311  and B 313  of the pixel  310 , sub-pixel G 322  of the pixel  320 , the sub-pixels R 351  and B 353  of the pixel  350 , and the sub-pixel  342  of the pixel  340 . The common lines (including the common line  0 , the common line  1 , the common line  2 , and the common line  3 ) are vertical to the data lines, and they are arranged as an array. In this embodiment, each of the common lines is coupled to a specific sub-pixel of two pixels, and another sub-pixel of another pixel, which is between the two pixels. Specifically, the common line  1  (com  1 ) is coupled to the sub-pixel R 311  of the first pixel  310 , the sub-pixel G 322  of the second pixel  320 , and the sub-pixel R 331  of the third pixel  330 . The common line  2  (com  2 ) is coupled to the sub-pixel G 312  of the first pixel  310 , the sub-pixel B 323  of the second pixel  320 , and the sub-pixel G 332  of the third pixel  330 . The common line  3  (com  3 ) is coupled to the sub-pixel B 313  of the first pixel  310 , the sub-pixel R 351  of the fifth pixel  350 , and the sub-pixel B 333  of the third pixel  330 . The first pixel  310  is adjacent to the second pixel  320 . The polarity of the first pixel  310  is opposite to the polarity of the second pixel  320 . Similarly, the first pixel  310  is adjacent to the second pixel  340 , and the polarity of the first pixel  310  is opposite to the polarity of the second pixel  340 . 
         [0037]    In  FIG. 4 , the present invention LCD device does not need one frame period to charge the pixels. This is because before the pixel voltage changes from 1V to 3V, a corresponding data signal having 8V voltage has been used to pre-charge the pixel in the same frame. The above-mentioned pixel voltage 1V is accomplished by utilizing the data signal 6V and common line signal 5V or the data signal 4V and common line signal 5V to charge the pixel. The pixel voltage 3V is accomplished by utilizing the data signal 8V and common line signal 5V or the data signal 2V and common line signal 5V to charge the pixel. The pre-charging voltage 8V is accomplished by utilizing the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V to charge the pixel. 
         [0038]    The first scan signal is transferred to the sub-pixels of the first row (including sub-pixel R 311  of the first pixel  310 , sub-pixel R 321  of the second pixel  320 , and sub-pixel R 331  of the third pixel  330 ). When the first scan signal corresponds to a high level, the gates of the sub-pixels of the first row are on. This makes the sub-pixels of the first row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. In addition, when the first scan signal corresponds to a high level voltage, because the sub-pixels R 311  and R 331  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  1 , which is modulated from 5V to 0V, to pre-charge the sub-pixels R 311  and R 331  to 8V. At the same time, the sub-pixel R 321  corresponds to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage 10V of the common line  0  to pre-charge the sub-pixel R 321  to 8V. And then, the first scan signal corresponds to a low voltage such that the gates of the sub-pixels of the first row are off. 
         [0039]    Similarly, the second scan signal is transferred to the sub-pixels of the second row (including sub-pixel G 312  of the first pixel  310 , sub-pixel G 322  of the second pixel  320 , and sub-pixel G 332  of the third pixel  330 ). When the second scan signal corresponds to a high level, the gates of the sub-pixels of the second row are on. This also makes the sub-pixels of the second row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. In addition, when the second scan signal corresponds to a high level voltage, because the sub-pixels G 312  and G 332  correspond to a negative polarity data line 2V, this data line 2V can cooperate with the common voltage of the common line  2 , which is modulated from 5V to 10V, to pre-charge the sub-pixels G 312  and G 332  to 8V. At the same time, the sub-pixel R 322  corresponds to a positive polarity data line 8V. This data line 8V can cooperate with the common voltage 0V of the common line  1  to pre-charge the sub-pixel G 322  to 8V. And then, the second scan signal corresponds to a low voltage such that the gates of the sub-pixels of the second row are off. 
         [0040]    Furthermore, the third scan signal is transferred to the sub-pixels of the third row (including sub-pixel B 313  of the first pixel  310 , sub-pixel B 323  of the second pixel  320 , and sub-pixel B 333  of the third pixel  330 ). When the third scan signal corresponds to a high level, the gates of the sub-pixels of the third row are on. This also makes the sub-pixels of the third row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. In addition, when the third scan signal corresponds to a high level voltage, because the sub-pixels B 313  and B 333  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  3 , which is modulated from 5V to 0V, to pre-charge the sub-pixels B 313  and B 333  to 8V. At the same time, the sub-pixel B 323  corresponds to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage 10V of the common line  2  to pre-charge the sub-pixel B 323  to 8V. When the third scan signal corresponds to a high level, the first scan signal corresponds to a high level. Because the sub-pixels R 311  and R 331  both correspond to the positive polarity data line 8V, the data line 8V can cooperate with the common voltage of the common line  1 , which is back to 5V, to charge the sub-pixels R 311  and R 331  to the target voltage 3V. Simultaneously, the sub-pixel R 321  corresponds to a negative data line 2V. The data line 2V can cooperate with the common voltage of the common line  0 , which is back to 5V, to charge the sub-pixel R 321  to the target voltage 3V. 
         [0041]    And then, the fourth scan signal corresponds to a high level such that the gates of the sub-pixels of the fourth row are on, and so on. In this way, the over-driving operation can be finished in a frame period. 
         [0042]    Please refer to  FIG. 5 , which is a diagram showing a part of the LCD device according to a second embodiment of the present invention. In this embodiment, the pixel is composed of three sub-pixels (sub-pixel R, sub-pixel G, and sub-pixel B). In addition, the pixels are row-by-row driven. The three sub-pixels in a pixel are arranged along a direction vertical to the scanning direction. In addition, a data line is coupled to all the three sub-pixels of a pixel according to the order of sub-pixel R, sub-pixel G, and sub-pixel B. The pixels are driven by a column driving configuration. The sub-pixels corresponding to the same column have the same polarity. 
         [0043]    To speak more specifically, the data line  1  is coupled to the sub-pixels R 511 , G 512 , and B 513  of the first pixel  510 . The common line  1  is coupled to the sub-pixels R 511  and G 512  of the first pixel  510  and the sub-pixels R 531  and G 532  of the third pixel  530 . The common line  2  is coupled to the sub-pixels G 522  and B 523  of the second pixel  520 . The common line  3  is coupled to the sub-pixels B 513  of the first pixel  510 , the sub-pixel R 541  of the fourth pixel  540 , the sub-pixel B 533  of the third pixel  530 , and R 561  of the sixth pixel  560 . The common lines  1 ,  2 , and  3  are arranged along a direction vertical to the data lines, and the common lines and data lines form an array. The first pixel  510  is adjacent to the second pixel  520 , and they have opposite polarities. 
         [0044]    Please refer to  FIG. 5  in conjunction with  FIG. 4 . The first scan signal is transferred to the sub-pixels of the first row (including sub-pixel R 511  of the first pixel  510 , sub-pixel R 521  of the second pixel  520 , and sub-pixel R 531  of the third pixel  530 ). When the first scan signal corresponds to a high level, the gates of the sub-pixels of the first row are on. This makes the sub-pixels of the first row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. In addition, when the first scan signal corresponds to a high level voltage, because the sub-pixels R 511  and R 531  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  1 , which is modulated from 5V to 0V, to pre-charge the sub-pixels R 511  and R 531  to 8V. At the same time, the sub-pixel R 521  corresponds to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage 10V of the common line  0  to pre-charge the sub-pixel R 521  to 8V. And then, the first scan signal corresponds to a low voltage such that the gates of the sub-pixels of the first row are off. 
         [0045]    Similarly, the second scan signal is transferred to the sub-pixels of the second row (including sub-pixel G 512  of the first pixel  510 , sub-pixel G 522  of the second pixel  520 , and sub-pixel G 532  of the third pixel  530 ). When the second scan signal corresponds to a high level, the gates of the sub-pixels of the second row are on. This also makes the sub-pixels of the second row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. In addition, when the second scan signal corresponds to a high level voltage, because the sub-pixels G 512  and R 532  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  2 , which maintains 0V as high as the voltage when the first scan signal corresponds to a high level, to pre-charge the sub-pixels G 512  and G 532  to 8V. At the same time, the sub-pixel G 522  corresponds to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage of the common line  2 , which is modulated from 5V to 10V, to pre-charge the sub-pixel G 522  to 8V. And then, the second scan signal corresponds to a low voltage such that the gates of the sub-pixels of the second row are off. 
         [0046]    Furthermore, the third scan signal is transferred to the sub-pixels of the third row (including sub-pixel B 513  of the first pixel  310 , sub-pixel B 523  of the second pixel  320 , and sub-pixel B 533  of the third pixel  330 ). When the third scan signal corresponds to a high level, the gates of the sub-pixels of the third row are on. This also makes the sub-pixels of the third row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. In addition, when the third scan signal corresponds to a high level voltage, because the sub-pixels B 513  and B 533  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  3 , which is modulated from 5V to 0V, to pre-charge the sub-pixels B 513  and B 533  to 8V. At the same time, the sub-pixel B 523  corresponds to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage 10V of the common line  2  to pre-charge the sub-pixel B 523  to 8V. When the third scan signal corresponds to a high level, the first scan signal corresponds to a high level. Because the sub-pixels R 511  and R 531  both correspond to the positive polarity data line 8V, the data line 8V can cooperate with the common voltage of the common line  1 , which is back to 5V, to charge the sub-pixels R 511  and R 531  to the target voltage 3V. Simultaneously, the sub-pixel R 521  corresponds to a negative data line 2V. The data line 2V can cooperate with the common voltage of the common line  0 , which is back to 5V, to charge the sub-pixel R 521  to the target voltage 3V. 
         [0047]    And then, the fourth scan signal corresponds to a high level such that the gates of the sub-pixels of the fourth row are on, and so on. In this way, the over-driving operation can be finished in a frame period. 
         [0048]    Please refer to  FIG. 6 , which is a diagram showing a part of the LCD device according to a third embodiment of the present invention. In this embodiment, the LCD device comprises a plurality of vertical-strip pixels, and each vertical-strip pixel is composed of three vertical-strip sub-pixels (sub-pixel R, sub-pixel G, and sub-pixel B). As shown in  FIG. 6 , the sub-pixels R, G, and B are arranged in a horizontal direction. The pixels are driven by a column driving configuration. The sub-pixels corresponding to the same column have the same polarity. The data lines are vertical to the arranging direction of the sub-pixels R, G, and B. Each of the data lines is coupled to the sub-pixels having the same polarity. 
         [0049]    To speak more specifically, the data line  1  is coupled to the sub-pixel B 611  of the first pixel  610 , the sub-pixel B 631  of the third pixel  630 , and the sub-pixel B 651  of the fifth pixel  650 . The common lines  1 ,  2 , and  3  are orthogonal to the data lines, and the common lines and the data lines form an array. In this embodiment, the common line  1  is coupled to the sub-pixel B 611  of the first pixel  610 , the sub-pixel B 631  of the third pixel  630 , the sub-pixel R 613  of the first pixel  610 , the sub-pixel R 633  of the third pixel  630 , the sub-pixel G 622  of the second pixel  620 , and the sub-pixel G 642  of the fourth pixel  640 . The common line  2  is coupled to the sub-pixel G 632  of the third pixel  630 , the sub-pixel G 652  of the fifth pixel  650 , the sub-pixel B 641  of the fourth pixel  640 , the sub-pixel B 661  of the sixth pixel  660 , the sub-pixel R 643  of the fourth pixel  640 , and the sub-pixel R 663  of the sixth pixel  660 . The coupling configuration of the common  3  can be referred to  FIG. 6 , and thus omitted here. The pixel  610  is adjacent to the pixel  620 , and they have opposite polarity. In addition, the pixel  610  is adjacent to the pixel  630 , and they have the same polarity. 
         [0050]    Please refer to  FIG. 6  in conjunction with  FIG. 4 . The first scan signal is transferred to the sub-pixels of the first row (including sub-pixels B 611 , G 612 , R 613  of the first pixel  610 , and the sub-pixels B 621 , G 622 , R 623  of the second pixel  620 ). When the first scan signal corresponds to a high level, the gates of the sub-pixels of the first row are on. This makes the sub-pixels of the first row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. 
         [0051]    In addition, when the first scan signal corresponds to a high level voltage, because the sub-pixels B 611 , R 613 , and G 622  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  1 , which is modulated from 5V to 0V, to pre-charge the sub-pixels B 611 , R 613 , and G 622  to 8V. At the same time, the sub-pixels G 612 , B 621 , and R 623  correspond to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage 10V of the common line  0  to pre-charge the sub-pixels G 612 , B 621 , and R 623  to 8V. And then, the first scan signal corresponds to a low voltage such that the gates of the sub-pixels of the first row are off. 
         [0052]    Similarly, the second scan signal is transferred to the sub-pixels of the second row (including sub-pixels B 631 , G 632 , R 633  of the third pixel  630 , and sub-pixels B 641 , G 642 , R 643  of the fourth pixel  640 ). When the second scan signal corresponds to a high level, the gates of the sub-pixels of the second row are on. This also makes the sub-pixels of the second row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. 
         [0053]    In addition, when the second scan signal corresponds to a high level voltage, because the sub-pixels B 631 , R 633 , and G 642  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  1 , which maintains 0V as high as the voltage when the first scan signal corresponds to a high level, to pre-charge the sub-pixels B 631 , R 633 , and G 642  to 8V. At the same time, the sub-pixels G 632 , B 641 , R 643  correspond to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage of the common line  2 , which is modulated from 5V to 10V, to pre-charge the sub-pixels G 632 , B 641 , R 643  to 8V. And then, the second scan signal corresponds to a low voltage such that the gates of the sub-pixels of the second row are off. 
         [0054]    Furthermore, the third scan signal is transferred to the sub-pixels of the third row (including sub-pixel B 651 , G 652 , R 653  of the fifth pixel  650 , and sub-pixels B 661 , G 662 , R 663  of the sixth pixel  660 ). When the third scan signal corresponds to a high level, the gates of the sub-pixels of the third row are on. This also makes the sub-pixels of the third row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. 
         [0055]    In addition, when the third scan signal corresponds to a high level voltage, because the sub-pixels B 651 , R 653 , and G 662  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  3 , which is modulated from 5V to 0V, to pre-charge the sub-pixels B 651 , R 653 , and G 662  to 8V. At the same time, the sub-pixels G 652 , B 661 , and R 663  correspond to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage 10V of the common line  2  to pre-charge the sub-pixels G 652 , B 661 , and R 663  to 8V. When the third scan signal corresponds to a high level, the first scan signal corresponds to a high level. Because the sub-pixels B 611 , R 613 , and G 622  correspond to the positive polarity data line 8V, the data line 8V can cooperate with the common voltage of the common line  1 , which is back to 5V, to charge the sub-pixels B 611 , R 613 , and G 622  to the target voltage 3V. Simultaneously, the sub-pixel G 612 , B 621 , and R 623  corresponds to a negative data line 2V. The data line 2V can cooperate with the common voltage of the common line  0 , which is back to 5V, to charge the sub-pixels G 612 , B 621 , and R 623  to the target voltage 3V. 
         [0056]    And then, the fourth scan signal corresponds to a high level such that the gates of the sub-pixels of the fourth row are on, and so on. In this way, the over-driving operation can be finished in a frame period. 
         [0057]    Please refer to  FIG. 7 , which is a diagram showing a part of the LCD device according to a fourth embodiment of the present invention. Similar to the third embodiment, in this embodiment, the pixels are also driven by a column driving configuration. Furthermore, in this embodiment, the LCD device comprises a plurality of vertical-strip pixels, and each vertical-strip pixel is composed of three vertical-strip sub-pixels (sub-pixel R, sub-pixel G, and sub-pixel B). As shown in  FIG. 6 , the sub-pixels R, G, and B are arranged in a horizontal direction. The pixel  710  and the pixel  720  are adjacent in the same row, the pixel  730  and the pixel  740  are adjacent in the same row, and so on. 
         [0058]    The data lines are coupled according to Flip-pixel configuration. This means that a specific data line is only coupled to odd sub-pixels or even sub-pixels such that the odd sub-pixels and even sub-pixels corresponding to the same column can have different polarities. To speak more specifically, the data line  1  is coupled to the sub-pixel B 711  of the first pixel  710 , the sub-pixel G 732  of the third pixel  730 , and the sub-pixel B 751  of the fifth pixel  750 . The data line  2  is coupled to the sub-pixel G 712  of the first pixel  710 , the sub-pixel R 733  of the third pixel  730 , and the sub-pixel G 752  of the fifth pixel  750 . The data line  3  is coupled to the sub-pixel R 713  of the first pixel  710 , the sub-pixel B 741  of the fourth pixel  740 , and the sub-pixel R 753  of the fifth pixel  750 , and so on. 
         [0059]    The common lines  1 ,  2 , and  3  are orthogonal to the data lines, and they form an array. In this embodiment, a specific common line is alternatively coupled to the sub-pixels adjacent to the specific common line. As shown in  FIG. 7 , the common line  1  is coupled to the sub-pixels B 711  and R 713  of the first pixel  710 , the sub-pixel G 722  of the second pixel  720 , the sub-pixel G 732  of the third pixel  730 , the sub-pixels B 741  and R 743  of the fourth pixel  740 . The common line  2  is coupled to the sub-pixels B 731  and R 733  of the third pixel  730 , the sub-pixel G 742  of the fourth pixel  740 , the sub-pixel G 752  of the fifth pixel  750 , the sub-pixels B 761  and R 763  of the sixth pixel  760 . The coupling configuration of the common  3  is shown in  FIG. 7  and thus omitted here. 
         [0060]    In addition, the pixel  710  is adjacent to the pixel  720 , and they have opposite polarities. Furthermore, the pixel  710  is adjacent to the pixel  730 , and they have opposite polarities, also. In  FIG. 7 , adjacent sub-pixels have opposite polarities. 
         [0061]    Please refer to  FIG. 7  in conjunction with  FIG. 4 . The first scan signal is transferred to the sub-pixels of the first row (including sub-pixels B 711 , G 712 , R 713  of the first pixel  710 , and the sub-pixels B 721 , G 722 , R 723  of the second pixel  720 ). When the first scan signal corresponds to a high level, the gates of the sub-pixels of the first row are on. This makes the sub-pixels of the first row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. 
         [0062]    In addition, when the first scan signal corresponds to a high level voltage, because the sub-pixels B 711 , R 713 , and G 722  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  1 , which is modulated from 5V to 0V, to pre-charge the sub-pixels B 711 , R 713 , and G 722  to 8V. At the same time, the sub-pixels G 712 , B 721 , and R 723  correspond to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage 10V of the common line  0  to pre-charge the sub-pixels G 712 , B 721 , and R 723  to 8V. And then, the first scan signal corresponds to a low voltage such that the gates of the sub-pixels of the first row are off. 
         [0063]    Similarly, the second scan signal is transferred to the sub-pixels of the second row (including sub-pixels B 731 , G 732 , R 733  of the third pixel  730 , and sub-pixels B 741 , G 742 , R 743  of the fourth pixel  740 ). When the second scan signal corresponds to a high level, the gates of the sub-pixels of the second row are on. This also makes the sub-pixels of the second row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. 
         [0064]    In addition, when the second scan signal corresponds to a high level voltage, because the sub-pixels G 732 , B 741 , and R 743  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  1 , which maintains 0V as high as the voltage when the first scan signal corresponds to a high level, to pre-charge the sub-pixels G 732 , B 741 , and R 743  to 8V. At the same time, the sub-pixels B 731 , R 733 , G 742  correspond to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage of the common line  2 , which is modulated from 5V to 10V, to pre-charge the sub-pixels B 731 , R 733 , G 742  to 8V. And then, the second scan signal corresponds to a low voltage such that the gates of the sub-pixels of the second row are off. 
         [0065]    Furthermore, the third scan signal is transferred to the sub-pixels of the third row (including sub-pixel B 751 , G 752 , R 753  of the fifth pixel  750 , and sub-pixels B 761 , G 762 , R 763  of the sixth pixel  760 ). When the third scan signal corresponds to a high level, the gates of the sub-pixels of the third row are on. This also makes the sub-pixels of the third row be pre-charged by the data signal 8V and the common line modulated signal 0V or the data signal 2V and the common line modulated signal 10V before the pixel voltage changes from 1V to 3V. 
         [0066]    In addition, when the third scan signal corresponds to a high level voltage, because the sub-pixels B 751 , R 753 , and G 762  correspond to a positive polarity data line 8V, this data line 8V can cooperate with the common voltage of the common line  3 , which is modulated from 5V to 0V, to pre-charge the sub-pixels B 751 , R 753 , and G 762  to 8V. At the same time, the sub-pixels G 752 , B 761 , and R 763  correspond to a negative polarity data line 2V. This data line 2V can cooperate with the common voltage 10V of the common line  2  to pre-charge the sub-pixels G 752 , B 761 , and R 763  to 8V. When the third scan signal corresponds to a high level, the first scan signal corresponds to a high level. Because the sub-pixels B 711 , R 713  and G 722  correspond to the positive polarity data line 8V, the data line 8V can cooperate with the common voltage of the common line  1 , which is back to 5V, to charge the sub-pixels B 711 , R 713  and G 722  to the target voltage 3V. Simultaneously, the sub-pixels G 712 , B 721 , and R 723  correspond to a negative data line 2V. The data line 2V can cooperate with the common voltage of the common line  0 , which is back to 5V, to charge the sub-pixels G 712 , B 721 , and R 723  to the target voltage 3V. 
         [0067]    And then, the fourth scan signal corresponds to a high level such that the gates of the sub-pixels of the fourth row are on, and so on. In this way, the over-driving operation can be finished in a frame period. 
         [0068]    According to the above-mentioned embodiments, the present invention driving method for driving the LCD device includes following steps: utilizing the scan driving module to generate scan signals and transferring the scan signals to the scan lines; utilizing the data driving module to generate data signal and transferring the data signals to the data lines; utilizing the scan lines to transfer the scan signals to at least one sub-pixel of the pixels to row-by-row scan sub-pixels located in a same column; utilizing the data lines to pre-charge at least one sub-pixel of the pixels, and to transfer the data signals to the sub-pixel in order to display an image. Furthermore, the above driving method can further includes the following step: utilizing common lines to provide a high voltage or a low voltage to the sub-pixels coupled to the common lines. 
         [0069]    Those skilled in the art will readily observe that numerous modifications and alterations of the device may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.