CN100580763C - Liquid crystal display and its driving method - Google Patents

Abstract

The present invention relates to a liquid crystal display and a driving method thereof. The driving method of the liquid crystal display provided by the present invention comprises the following steps: transmitting image data to the liquid crystal display at a first frequency, and processing the image data according to the first frequency and a first gamma lookup table to generate a bright area image frame. Transmitting the image data to the liquid crystal display at the first frequency, and processing the image data according to the first frequency and a second gamma lookup table to generate a dark area image frame. The bright area image frame and the dark area image frame are sequentially superimposed to display the image frame on a display panel of the liquid crystal display.

Description

Liquid crystal display and its driving method

technical field

The present invention relates to a liquid crystal display and its driving method, and in particular relates to a liquid crystal display and its driving method which can improve the large-view angle deviation phenomenon of the liquid crystal display.

Background technique

Liquid Crystal Display (LCD) has gradually become the mainstream of the market due to its superior characteristics such as high image quality, good space utilization efficiency, low power consumption, and no radiation. At present, the performance requirements of the market for liquid crystal displays are high contrast (High Contrast Ratio), fast response, and wide viewing angle. Currently, the technologies that can meet the wide viewing angle requirements include: Multi-domain Vertical Alignment (Multi-domain Vertically Alignment, MVA), Multi-domain Horizontal Alignment (MHA), Twisted Nematic plus wide viewing film (TN+film) and In-Plane Switching (IPS) and other technologies.

Although the liquid crystal display can achieve the purpose of wide viewing angle through the above-mentioned multiple technologies, in reality, since the gamma curve of the large viewing angle will be different from the gamma curve of the normal viewing angle, when the user stands When viewing an image displayed on a liquid crystal display at a relatively oblique angle (such as 60 degrees), the color of the image it sees will not be the same as the color of the same image viewed from the front. This phenomenon is the so-called "color cast". In order to improve the color shift problem of the large viewing angle of the liquid crystal display, some people have proposed a method of mixing a higher gray-scale color and a lower gray-scale color into a middle gray-scale color, and based on this, two methods for improving color shift have been developed. method.

The existing method for improving color shift is to spatially divide each pixel in the display panel into two sub-pixels, and apply two different driving voltages to the two sub-pixels in accordance with the target gray scale of each pixel , so that the equivalent gray scale of the two sub-pixels in each pixel is equal to its target gray scale. Although this method can make the color shift problem of the large viewing angle of the liquid crystal display turn into a slowdown, and when the user watches the image picture displayed by the liquid crystal display from a front view or from an oblique angle, the image picture with similar colors can be seen, but Following such solutions will reduce the picture resolution of the LCD.

Another existing method for improving color shift is mainly to increase the frequency of processing image data to twice the frequency of transmitting image data, that is, to change the frame rate of the liquid crystal display, and to use two sub-image frames superimposed into an image screen finally displayed on the LCD monitor. In this way, there is no need to design partitions for the pixels of the display panel, so the image resolution of the liquid crystal display will not decrease. However, following such a solution will cause flickering of the image displayed on the liquid crystal display.

Contents of the invention

The present invention provides a driving method of a liquid crystal display, which includes the following steps: transmitting image data to a liquid crystal display at a first frequency, and processing the image data according to the first frequency and a first gamma lookup table to generate bright areas Image frame: transmit the image data to the liquid crystal display at the first frequency, and process the image data according to the first frequency and the second gamma lookup table to generate a dark area image frame; sequentially superimpose the bright The area image frame and the dark area image frame are used to display the image frame on the display panel of the liquid crystal display.

According to an embodiment of the present invention, the penetration rate found in the first gamma lookup table for the same digital grayscale value is greater than the penetration rate found in the second gamma lookup table, and the The display time of the image frame in the dark area is longer than the display time of the image frame in the bright area.

According to an embodiment of the present invention, the step of generating the image frame in the bright area includes: searching for the respective transmittances corresponding to all the digital grayscale values of the image data in the first gamma lookup table, and according to To provide corresponding first grayscale voltages to pixels in the display panel.

According to an embodiment of the present invention, the step of generating the image frame in the dark area includes: looking up the respective transmittances corresponding to all the digital gray scale values of the image data in the second gamma lookup table, and according to To provide corresponding second grayscale voltages to pixels in the display panel.

According to an embodiment of the present invention, the display time ratio of the dark area image frame and the bright area image frame is 2:1.

According to an embodiment of the present invention, the frame update rate of the liquid crystal display is the first frequency, and the first frequency is 120 Hz.

The present invention further provides a method for driving a liquid crystal display, which includes the following steps: transmitting image data to the liquid crystal display at a first frequency, and processing the image data according to the first frequency and a first gamma lookup table to generate bright area image frame; transmit the image data to a liquid crystal display at the first frequency, and process the image data according to the first frequency and a second gamma lookup table to generate a first dark area image frame; The first frequency transmits the image data to the liquid crystal display, and processes the image data according to the first frequency and the third gamma lookup table to generate a second dark area image frame; sequentially superimposes the bright area image frame, The first dark area image frame and the second dark area image frame are used to display image frames on a display panel of a liquid crystal display.

According to an embodiment of the present invention, the penetration rate found in the first gamma look-up table for the same digital gray scale value is greater than the penetration rate found in the second gamma look-up table, and the penetration rate found in the second gamma look-up table is The transmittance found in the second gamma lookup table is greater than the transmittance found in the third gamma lookup table, and the display time of the image frame in the first dark area is accumulated by the second dark area The display time of the area image frame is longer than the display time of the bright area image frame.

According to an embodiment of the present invention, the step of generating the image frame in the bright area includes: searching for the respective transmittances corresponding to all the digital grayscale values of the image data in the first gamma lookup table, and according to To provide corresponding first grayscale voltages to pixels in the display panel.

According to an embodiment of the present invention, the step of generating the first dark region image frame includes: searching for the respective transmittances corresponding to all the digital gray scale values of the image data in the second gamma lookup table, And accordingly provide the corresponding second grayscale voltage to the pixels in the display panel.

According to an embodiment of the present invention, the step of generating the second dark area image frame includes: searching for the respective transmittances corresponding to all digital grayscale values of the image data in the third gamma lookup table, And accordingly provide the corresponding third grayscale voltage to the pixels in the display panel.

According to an embodiment of the present invention, a display time ratio of the first dark area image frame, the second dark area image frame, and the bright area image frame is 1:1:1.

According to an embodiment of the present invention, the frame update rate of the liquid crystal display is the first frequency, and the first frequency is 120 Hz.

The present invention further provides a liquid crystal display, which includes a timing controller and a display panel, wherein the timing controller is used to receive image data transmitted at a first frequency, and according to the first frequency and at least a first built-in gamma After the gamma lookup table and the second gamma lookup table process the image data, respectively generate a bright area image frame and a first dark area image frame. The display panel is electrically connected to the timing controller for sequentially superimposing the image frame in the bright region and the image frame in the first dark region to display the image frame.

According to an embodiment of the present invention, the penetration rate found in the first gamma lookup table for the same digital grayscale value is greater than the penetration rate found in the second gamma lookup table, and the The display time of the first dark area image frame is longer than the display time of the bright area image frame.

According to an embodiment of the present invention, the timing controller is used to look up the respective transmittances corresponding to all digital grayscale values of the image data in the first gamma lookup table, and accordingly control the source driver to provide corresponding The first gray scale voltage is applied to the pixels in the display panel.

According to an embodiment of the present invention, the timing controller is used to look up the respective transmittances corresponding to all digital grayscale values of the image data in the second gamma lookup table, and accordingly control the source driver to provide corresponding The second gray scale voltage is applied to the pixels in the display panel.

According to an embodiment of the present invention, a display time ratio of the first dark area image frame and the bright area image frame is 2:1.

According to an embodiment of the present invention, the frame update rate of the liquid crystal display is the first frequency, and the first frequency is 120 Hz.

The present invention further provides a liquid crystal display, which includes a timing controller and a display panel, wherein the timing controller is used to receive image data transmitted at a first frequency, and according to the first frequency and at least a first built-in gamma After the image data is processed by the gamma lookup table and the second gamma lookup table, a bright area image frame and a first dark area image frame are generated respectively, which are processed according to the first frequency and its own built-in third gamma lookup table After the image data, a second dark area image frame is generated. The display panel is electrically connected to the timing controller for sequentially superimposing the bright area image frame, the first dark area image frame and the second dark area image frame to display the video screen.

According to an embodiment of the present invention, the penetration rate found in the first gamma look-up table for the same digital gray scale value is greater than the penetration rate found in the second gamma look-up table, and the penetration rate found in the second gamma look-up table is The transmittance found in the second gamma lookup table is greater than the transmittance found in the third gamma lookup table, and the display time of the image frame in the first dark area is accumulated by the second dark area The display time of the area image frame is longer than the display time of the bright area image frame.

According to another embodiment of the present invention, the timing controller is used to look up the respective transmittances corresponding to all the digital gray scale values of the image data in the first gamma lookup table, and accordingly control the source driver to provide The corresponding first gray scale voltage is applied to the pixels in the display panel.

According to another embodiment of the present invention, the timing controller is used to look up the respective transmittances corresponding to all the digital grayscale values of the image data in the second gamma lookup table, and accordingly control the source driver to provide The corresponding second grayscale voltage is applied to the pixels in the display panel.

According to another embodiment of the present invention, the timing controller is used to look up the respective transmittances corresponding to all digital grayscale values of the image data in the third gamma lookup table, and accordingly control the source driver to provide The corresponding third gray scale voltage is supplied to the pixels in the display panel.

According to another embodiment of the present invention, a display time ratio of the first dark area image frame, the second dark area image frame, and the bright area image frame is 1:1:1.

According to another embodiment of the present invention, the frame update rate of the liquid crystal display is the first frequency, and the first frequency is 120 Hz.

The driving method of the liquid crystal display proposed by the present invention uses the same frequency to transmit and process image data, so that the image displayed by the liquid crystal display to which it is applied will not flicker. In addition, since any driving method of the liquid crystal display proposed by the present invention does not need to design partitions for the pixels of the display panel, the liquid crystal display can be effectively improved without reducing the screen resolution of the liquid crystal display. Look at the problem of biased roles.

Description of drawings

FIG. 1 is a system architecture diagram of a liquid crystal display according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the coupling relationship between some pixels in the display panel of the liquid crystal display shown in FIG. 1 .

FIG. 3 is a flowchart of a method for driving a liquid crystal display according to an embodiment of the invention.

FIG. 4 is a flowchart of a method for driving a liquid crystal display according to another embodiment of the present invention.

Figure number:

100: LCD display

101: Timing controller

103: Gate driver

105: Source driver

107: Display panel

101a: first gamma lookup table

101b: second gamma lookup table

P: pixel

G1～Gm: Gate wiring

S1～Sm: Source wiring

S301-S305: each step of the flow chart of the driving method of the liquid crystal display according to an embodiment of the present invention

S401-S407: each step in the flow chart of the driving method of the liquid crystal display in another embodiment of the present invention

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments of the present invention will be described in detail below together with the accompanying drawings.

The present invention can effectively solve the disadvantages derived from the above-mentioned method for improving the large viewing angle deviation of the liquid crystal display in the prior art, namely, the problems of reduced picture resolution and flickering of the video picture.

FIG. 1 is a system architecture diagram of a liquid crystal display according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the coupling relationship between some pixels in the display panel of the liquid crystal display shown in FIG. 1 . Please refer to FIG. 1 and FIG. 2 together. The liquid crystal display 100 includes a timing controller (timing controller) 101, a gate driver (gated driver) 103, a source driver (source driver) 105, and a display panel 107. Wherein, the gate driver 103 has a plurality of gate wirings G1-Gm, and the gate driver 103 will sequentially output scanning signals through the gate wirings G1-Gm according to the basic timing provided by the timing controller 101. (scan signal), so as to correspondingly open each row of pixels in the display panel 107.

The source driver 105 has a plurality of source wires S1-Sn, and the source driver 105 outputs the corresponding video data through the source wires S1-Sn according to the video data provided by the timing controller 101. The data signal is sent to the column pixels in the display panel 107 which are turned on by the gate driver 103 . It can be seen from the schematic diagram shown in FIG. 2 that the display panel 107 has a plurality of pixels (pixels) P, and each pixel P is arranged on the corresponding gate lines G1-Gm and source lines S1-Sn. of the intersection. To be more clear, the pixels P of all odd-numbered columns of pixels are arranged at intersections of odd-numbered gate wirings G1, G3 . It is arranged at the intersection of the even-numbered gate wirings G2, G4... and the corresponding source wirings S2-S4, but the arrangement position of the pixels in the present invention is not limited to this, and other pixel arrangement methods are also possible .

The timing controller 101 is used to receive image data transmitted at a first frequency (for example, 120 Hz), and process it according to the first frequency and at least a first gamma lookup table 101a and a second gamma lookup table 101b built into it. After receiving the image data, a bright area image frame and a first dark area image frame are respectively generated. In this embodiment, the timing controller 101 is used to look up the respective transmittances corresponding to all the digital gray scale values of the received image data in the first gamma lookup table 101a, and accordingly control the source driver 105 to provide The corresponding first gray scale voltage is applied to the pixels P in the display panel 107 which are turned on one by one by the gate driver 103 . In this way, after all the pixels P in the display panel 107 are driven through the source driver 105 , the above-mentioned bright region image frame is generated.

In addition, the timing controller 101 can look up the respective transmittances corresponding to all the digital grayscale values of the received image data in the second gamma lookup table 101b, and accordingly control the source driver 105 to provide the corresponding second grayscale The level voltage is applied to the pixels P in the display panel 107 which are turned on one by one by the gate driver 103 . In this way, after all the pixels P in the display panel 107 are driven through the source driver 105 , the above-mentioned first dark region image frame is generated.

The display panel 107 is electrically connected to the timing controller 101 for sequentially superimposing the above-mentioned bright region image frame and the first dark region image frame to display the image frame. In this embodiment, the transmittance found in the first gamma look-up table 101a for the same digital gray scale value is greater than the transmittance found in the second gamma look-up table 101b, and the first dark area image frame The display time of is longer than the display time of the bright region image frame. For example, the display time ratio of the first dark area image frame and the bright area image frame may be 2:1, but the invention is not limited thereto.

Based on the above, since the timing controller 101 uses the same frequency (i.e. 120 Hz) to transmit and process image data, compared with the existing method of increasing the frequency of processing image data to twice the frequency of transmitting image data, The image displayed by the liquid crystal display 100 of this embodiment does not flicker. In addition, since this embodiment does not need to design partitions for the pixels P of the display panel 107, compared with the existing practice of dividing each pixel in the display panel into two sub-pixels, the screen of the liquid crystal display 100 of this embodiment The resolution can effectively improve the problem of color shift without reducing the resolution, that is, the gamma curve of the liquid crystal display when viewed at a large viewing angle is close to the gamma curve when viewed at a normal viewing angle.

Furthermore, according to the coupling relationship between the pixels P of the display panel 107, it can be seen that the display panel 107 can achieve the effect achieved by the dot inversion (dot inversion) driving method as long as the row inversion driving method (column inversion) is adopted. That is to improve the picture quality presented by the liquid crystal display 100 , and compared with the existing liquid crystal display adopting the dot inversion driving method, the overall power consumption of the liquid crystal display 100 of this embodiment will be lower.

In another embodiment of the present invention, besides the built-in first gamma lookup table 101a and the second gamma lookup table 101b, the timing controller 101 may also build in a third gamma lookup table (not shown). For example, the timing controller 101 also processes the received image data according to the first frequency (that is, 120 Hz) and its built-in first gamma lookup table 101a and second gamma lookup table 101b to generate The above bright area image frame and the first dark area image frame. In addition, the timing controller 101 will further process the received image data according to the first frequency and its built-in third gamma look-up table to generate a second dark area image frame.

In this embodiment, the timing controller 101 is used to look up the respective transmittances corresponding to all the digital gray scale values of the received image data in the third gamma look-up table, and accordingly control the source driver 105 to provide corresponding The third gray scale voltage is applied to the pixels P in the display panel 107 which are turned on one by one by the gate driver 103 . In this way, after all the pixels P in the display panel 107 are driven through the source driver 105 , the above-mentioned second dark region image frame is generated.

The display panel 107 can sequentially superimpose the above-mentioned bright region image frame, the first dark region image frame and the second dark region image frame to display the image frame. In this embodiment, the transmittance of the same digital grayscale value found in the first gamma lookup table 101a is greater than the transmittance found in the second gamma lookup table 101b, while the transmittance found in the second gamma lookup table 101b The transmittance found in table 101b is greater than the transmittance found in the third gamma lookup table, and the display time of the first dark area image frame plus the display time of the second dark area image frame is longer than the bright area image The display time of the screen. For example, the display time ratio of the first dark area image frame, the second dark area image frame and the bright area image frame may be 1:1:1, but the invention is not limited thereto.

Based on the above, since the timing controller 101 still utilizes the same frequency (i.e. 120 Hz) to transmit and process image data, compared with the existing method of increasing the frequency of processing image data to twice the frequency of transmitting image data, The image displayed on the liquid crystal display 100 of this embodiment also does not flicker. In addition, since this embodiment does not need to design partitions for the pixels P of the display panel 107, compared with the existing practice of dividing each pixel in the display panel into two sub-pixels, the screen of the liquid crystal display 100 in this embodiment The resolution can also improve the problem of color shift more effectively than the previous embodiment without reducing the resolution, that is, make the gamma curve of the large viewing angle closer to the gamma curve of the normal viewing angle. Furthermore, the liquid crystal display 100 of this embodiment also has the effect of reducing power consumption.

FIG. 3 is a flowchart of a method for driving a liquid crystal display according to an embodiment of the present invention. Please refer to FIG. 3 , the driving method of the liquid crystal display of the present embodiment includes the following steps: first, transmit image data to the liquid crystal display at a first frequency (for example, 120 Hz), and process the image data according to the first frequency and the first gamma look-up table After the image data, a bright area image frame is generated (step S301). In step S301, the step of generating the bright area image frame includes: looking up the respective transmittances corresponding to all the digital gray scale values of the image data in the first gamma lookup table, and providing corresponding The first gray scale voltage is applied to the pixels in the display panel. Next, transmit the image data to the liquid crystal display at the first frequency, and process the image data according to the first frequency and a second gamma lookup table to generate a dark area image frame (step S303 ). In step S303, the step of generating the image frame in the dark area includes: searching for the corresponding transmittances of all the digital grayscale values of the image data in the second gamma lookup table, and providing corresponding The second gray scale voltage is applied to the pixels in the display panel. Finally, the bright area image frame and the dark area image frame are sequentially superimposed to display the image frame on the display panel of the liquid crystal display (step S305 ). In this embodiment, the transmittance found in the first gamma look-up table for the same digital gray scale value is greater than the transmittance found in the second gamma look-up table, and the display time of the image in the dark area is longer than The display time of the bright area image screen. For example, the display time ratio of the image frames in the dark area and the image frames in the bright area may be 2:1, but the invention is not limited thereto.

FIG. 4 is a flowchart of a method for driving a liquid crystal display according to another embodiment of the present invention. Please refer to FIG. 4 , the driving method of the liquid crystal display of the present embodiment includes the following steps: first, transmit image data to the liquid crystal display at a first frequency (for example, 120 Hz), and process the image data according to the first frequency and the first gamma look-up table After the image data, a bright area image frame is generated (step S401). In step S401, the step of generating the bright area image frame includes: looking up the corresponding transmittances of all the digital grayscale values of the image data in the first gamma lookup table, and providing corresponding The first gray scale voltage is applied to the pixels in the display panel. Next, transmit the image data to the liquid crystal display at the first frequency, and process the image data according to the first frequency and the second gamma lookup table to generate a first dark area image frame (step S403) . In step S403, the step of generating the first dark area image frame includes: searching for the respective transmittances corresponding to all the digital gray scale values of the image data in the second gamma lookup table, and according to Corresponding second grayscale voltages are provided to pixels in the display panel. Then, transmit the image data to the liquid crystal display at the first frequency, and process the image data according to the first frequency and a third gamma lookup table to generate a second dark area image frame (step S405) . In step S405, the step of generating the second dark area image frame includes: looking up the respective transmittances corresponding to all the digital grayscale values of the image data in the third gamma lookup table, and according to The corresponding third grayscale voltage is provided to the pixels in the display panel. Finally, the bright region image frame, the first dark region image frame and the second dark region image frame are sequentially superimposed to display the image frame on the display panel of the liquid crystal display (step S407 ). In this embodiment, the transmittance found in the first gamma look-up table for the same digital grayscale value is greater than the transmittance found in the second gamma look-up table, and the transmittance found in the second gamma look-up table The transmittance found in the second gamma lookup table is greater than the transmittance found in the third gamma lookup table, and the display time of the first dark area image frame is added to the second dark area image The display time of the picture is longer than the display time of the bright area image picture, for example: the display time ratio of the first dark area image picture, the second dark area image picture and the bright area image picture can be 1:1:1, but The present invention is not limited thereto.

Most of the first frequency disclosed above is 120 Hz as an example, but those with ordinary knowledge in the technical field of the present invention should understand that the present invention is not limited thereto. A frequency to make adaptive changes. Furthermore, in the above-mentioned numerous embodiments, at most three gamma look-up tables are used as examples, but the present invention is not limited thereto.

To sum up, the driving method of the liquid crystal display proposed by the present invention uses the same frequency to transmit and process the image data, so that the image displayed by the liquid crystal display to which it is applied will not flicker. In addition, since any driving method of the liquid crystal display proposed by the present invention does not need to design partitions for the pixels of the display panel, the liquid crystal display can be effectively improved without reducing the screen resolution of the liquid crystal display. Look at the problem of biased roles.

Although the present invention has been disclosed above with embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Modification, therefore, the scope of protection of the present invention should be defined by the scope of the claims.

Claims (24)

1. the driving method of a LCD, described method comprises the following steps:

Transmit an image data to described LCD with a first frequency, and handle described image data to produce a clear zone image frame according to described first frequency and one first gamma lookup table;

Transmit described image data to described LCD with described first frequency, and handle described image data to produce a dark space image frame according to described first frequency and one second gamma lookup table; And

Superpose in regular turn described clear zone image frame and described dark space image frame, on a display panel of described LCD, showing an image frame,

Wherein, the penetrance that same numbers GTG value is found out at described first gamma lookup table is greater than the penetrance that is found out at described second gamma lookup table, and the demonstration time of described dark space image frame is longer than the demonstration time of described clear zone image frame.

2. the driving method of LCD as claimed in claim 1, the step that wherein produces described clear zone image frame comprises:

Search all digital gray level values of described image data and in described first gamma lookup table, distinguish corresponding penetrance, and provide corresponding one first gray scale voltage according to this to the interior pixel of described display panel.

3. the driving method of LCD as claimed in claim 1, the step that wherein produces described dark space image frame comprises:

Search all digital gray level values of described image data and in described second gamma lookup table, distinguish corresponding penetrance, and provide corresponding one second gray scale voltage according to this to the interior pixel of described display panel.

4. the driving method of LCD as claimed in claim 1, the demonstration time ratio of wherein said dark space image frame and described clear zone image frame is 2: 1.

5. the driving method of LCD as claimed in claim 1, the picture update rate of wherein said LCD is described first frequency.

6. the driving method of LCD as claimed in claim 5, wherein said first frequency is 120Hz.

7. the driving method of a LCD, described method comprises the following steps:

Transmit an image data to described LCD with a first frequency, and handle described image data according to described first frequency and one first gamma lookup table and produce a clear zone image frame;

Transmit described image data to described LCD with described first frequency, and handle described image data to produce one first dark space image frame according to described first frequency and one second gamma lookup table;

Transmit described image data to described LCD with described first frequency, and handle described image data to produce one second dark space image frame according to described first frequency and one the 3rd gamma lookup table; And

Superpose in regular turn described clear zone image frame, the described first dark space image frame and the described second dark space image frame, on a display panel of described LCD, showing an image frame,

Wherein, the penetrance that same numbers GTG value is found out at described first gamma lookup table is greater than the penetrance that is found out at described second gamma lookup table, and the penetrance that is found out at described second gamma lookup table is greater than the penetrance that is found out at described the 3rd gamma lookup table, and the demonstration time of the described first dark space image frame adds up the demonstration time that demonstration time of the described second dark space image frame is longer than described clear zone image frame.

8. the driving method of LCD as claimed in claim 7, the step that wherein produces described clear zone image frame comprises:

Search all digital gray level values of described image data and in described first gamma lookup table, distinguish corresponding penetrance, and provide corresponding one first gray scale voltage according to this to the interior pixel of described display panel.

9. the driving method of LCD as claimed in claim 7, the step that wherein produces the described first dark space image frame comprises:

Search all digital gray level values of described image data and in described second gamma lookup table, distinguish corresponding penetrance, and provide corresponding one second gray scale voltage according to this to the interior pixel of described display panel.

10. the driving method of LCD as claimed in claim 7, the step that wherein produces the described second dark space image frame comprises:

Search all digital gray level values of described image data and in described the 3rd gamma lookup table, distinguish corresponding penetrance, and provide corresponding one the 3rd gray scale voltage according to this to the interior pixel of described display panel.

11. the driving method of LCD as claimed in claim 7, the demonstration time ratio of the wherein said first dark space image frame, the described second dark space image frame and described clear zone image frame is 1: 1: 1.

12. the driving method of LCD as claimed in claim 7, the picture update rate of wherein said LCD are described first frequency.

13. the driving method of LCD as claimed in claim 12, wherein said first frequency are 120Hz.

14. a LCD is characterized in that, described LCD comprises:

Time schedule controller, in order to receive an image data that transmits with a first frequency, and after handling described image data according to described first frequency and itself built-in at least one first gamma lookup table and one second gamma lookup table, and produce a clear zone image frame and one first dark space image frame respectively; And

One display panel electrically connects described time schedule controller, in order to described clear zone image frame and the described first dark space image frame of superposeing in regular turn, and shows an image frame,

Wherein, the penetrance that same numbers GTG value is found out at described first gamma lookup table is greater than the penetrance that is found out at described second gamma lookup table, and the demonstration time of the described first dark space image frame is longer than the demonstration time of described clear zone image frame.

15. LCD as claimed in claim 14, it is characterized in that, described time schedule controller is distinguished corresponding penetrance in order to all digital gray level values of searching described image data in described first gamma lookup table, and controls the one source pole driver according to this pixel of corresponding one first gray scale voltage to the described display panel is provided.

16. LCD as claimed in claim 14, it is characterized in that, described time schedule controller is distinguished corresponding penetrance in order to all digital gray level values of searching described image data in described second gamma lookup table, and controls the one source pole driver according to this pixel of corresponding one second gray scale voltage to the described display panel is provided.

17. LCD as claimed in claim 14 is characterized in that, the demonstration time ratio of described first dark space image frame and described clear zone image frame is 2: 1.

18. LCD as claimed in claim 14 is characterized in that, the picture update rate of described LCD is described first frequency.

19. LCD as claimed in claim 18 is characterized in that, described first frequency is 120Hz.

20. a LCD is characterized in that, described LCD comprises:

Time schedule controller, in order to receive an image data that transmits with a first frequency, and after handling described image data according to described first frequency and itself built-in at least one first gamma lookup table and one second gamma lookup table, and produce a clear zone image frame and one first dark space image frame respectively, after the described first frequency of foundation and itself one the 3rd built-in gamma lookup table are handled described image data, and produce one second dark space image frame; And

One display panel electrically connects described time schedule controller, in order to the described clear zone image frame that superposes in regular turn, the described first dark space image frame and the described second dark space image frame, and shows described image frame,

Wherein, the penetrance that same numbers GTG value is found out at described first gamma lookup table is greater than the penetrance that is found out at described second gamma lookup table, and the penetrance that is found out at described second gamma lookup table is greater than the penetrance that is found out at described the 3rd gamma lookup table, and the demonstration time of the described first dark space image frame adds up the demonstration time that demonstration time of the described second dark space image frame is longer than described clear zone image frame.

21. LCD as claimed in claim 20, it is characterized in that, described time schedule controller is distinguished corresponding penetrance in order to all digital gray level values of searching described image data in described first gamma lookup table, and controls the one source pole driver according to this pixel of corresponding one first gray scale voltage to the described display panel is provided.

22. LCD as claimed in claim 20, it is characterized in that, described time schedule controller is distinguished corresponding penetrance in order to all digital gray level values of searching described image data in described second gamma lookup table, and controls the one source pole driver according to this pixel of corresponding one second gray scale voltage to the described display panel is provided.

23. LCD as claimed in claim 20, it is characterized in that, described time schedule controller is distinguished corresponding penetrance in order to all digital gray level values of searching described image data in described the 3rd gamma lookup table, and controls the one source pole driver according to this pixel of corresponding one the 3rd gray scale voltage to the described display panel is provided.

24. LCD as claimed in claim 20 is characterized in that, the demonstration time ratio of the described first dark space image frame, the described second dark space image frame and described clear zone image frame is 1: 1: 1.

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