TWI383366B - Liquid crystal display and driving method thereof - Google Patents

Description

Liquid crystal display and driving method thereof

The present invention relates to a liquid crystal display and a method of driving the same.

Due to its light weight, small size and low power consumption, liquid crystal displays are widely used in modern information equipment such as televisions, notebooks, computers, mobile phones, and personal digital assistants. However, since the liquid crystal system has a viscous substance, the response time of the liquid crystal display is generally long, and since the liquid crystal display device generally adopts a "Hold Type" driving method, when it is used for dynamic display, it is easy because Insufficient reaction speed causes image sticking and affects the quality of dynamic images.

A method for solving the image sticking phenomenon during dynamic display of a liquid crystal display is called Dynamic Impulsive Driving, which is also called Super Impulse technology, which divides a frame into a first sub-frame (Sub). -frame) and a second sub-frame, the picture brightness of the first sub-frame is higher than the target brightness of the frame picture, the picture brightness of the second sub-frame is lower than the target brightness of the frame picture, and the two sub-frames The total brightness is equal to the target brightness. Since the first sub-frame and the second sub-frame are bright and dark, the gray-scale change between the frame and the frame is relatively obvious, thereby improving the image sticking phenomenon of the dynamic picture to a certain extent, and improving the dynamic display of the liquid crystal display. The effect of the time.

However, the above dynamic gray insertion technique only improves the image sticking phenomenon by making the gray scale change between the frame and the frame relatively obvious, which does not substantially improve the response speed of the liquid crystal molecules, so that the liquid crystal molecules may not be able to be in a limited time. Twist Going to the target gray level, the target brightness cannot be achieved, which causes the liquid crystal display to still have image sticking, which affects the display quality.

In view of this, it is necessary to provide a liquid crystal display that effectively improves display quality.

At the same time, it is also necessary to provide a driving method for a liquid crystal display that effectively improves display quality.

A liquid crystal display includes a controller and a data driving circuit. The controller is configured to receive image data, and first generate a first sub-frame interpolation data and a second sub-frame interpolation data according to the image data of the current frame, and then And outputting, according to the first and second sub-frame interpolation data and the image data of the previous frame, a first sub-frame overdrive gray scale and a second sub-frame overdrive gray scale to the data driving circuit.

A liquid crystal display comprising an interpolation processor, an overdrive processor and a data driving circuit, wherein the interpolation processor is configured to sequentially receive image data of each frame and generate a first image according to image data of the current frame Sub-frame interpolation data and a second sub-frame interpolation data to the over-drive processor; the over-drive processor interpolates data according to the first and second sub-frame interpolation data and image data of the previous frame Generating an overdrive grayscale of a subframe; the data driving circuit receives the overdrive grayscale of the one subframe and the other subframe interpolation data.

A driving method of a liquid crystal display, the liquid crystal display comprising a liquid crystal display panel, the driving method comprising the steps of: providing image data of a current frame, and generating a first subframe of a current frame according to image data of the current frame Interpolating data and second sub-frame interpolation data; providing image data of a previous frame, generating a first sub-frame based on the first sub-frame interpolation data, the second sub-frame interpolation data, and the image data of the previous frame Driving the gray scale and a second sub-frame overdrive gray scale; and generating a complex gray scale voltage according to the first and second sub-frame overdrive gray scales, and applying the complex gray scale voltage to the liquid crystal display panel when the liquid crystal display panel is scanned The liquid crystal display panel.

A liquid crystal display driving method, the liquid crystal display comprising a liquid crystal display panel, the driving method comprising the steps of: providing image data of a current frame, generating first frame interpolation data of a current frame according to image data of the current frame and Interpolating data of the second sub-frame; providing image data of the previous frame, and generating a sub-frame interpolation data according to the first sub-frame interpolation data and the second sub-frame interpolation data and the image data of the previous frame The frame overdrive gray scale; and generating a complex gray scale voltage according to the sub-frame overdrive gray scale and another sub-frame interpolation data, and applying the complex gray scale voltage to the liquid crystal display panel when the liquid crystal display panel is scanned.

Compared with the prior art, the liquid crystal display of the present invention and the driving method thereof are driven by the at least one sub-frame interpolation data, and when the liquid crystal display panel is scanned, a plurality of overdrive gray scale voltages are applied to the liquid crystal display. In the panel, the response speed of the liquid crystal molecules is accelerated and easily reversed to the target gray scale to achieve the target brightness, and the residual image phenomenon of the liquid crystal display is improved, and the display quality is good.

Please refer to FIG. 1 , which is a schematic structural diagram of a circuit of a liquid crystal display 1 of the present invention. The liquid crystal display 1 includes a liquid crystal display panel 10. A scan driver circuit 20, a data driver circuit 30, an interpolation processor 50, and an overdrive processor 40.

The interpolation processor 50 is configured to receive image data of each frame, and generate a first subframe interpolation data and a second subframe interpolation data according to gray scales of the image data of each frame, and the first The sub-frame interpolation data and the second sub-frame interpolation data are output to the overdrive processor 40. The interpolation processor 50 includes a Black Insertion processor 53 and a gray insertion processor 55.

The overdrive processor 40 is configured to receive image data of each frame, first subframe interpolation data, and second subframe interpolation data to generate a first subframe overdrive grayscale and a second subframe overdrive grayscale And outputting the first sub-frame overdrive gray scale and the second sub-frame overdrive gray scale to the data driving circuit 30. The overdrive processor 40 includes a buffer 41, a first lookup table (LUT) 43, and a second lookup table 45.

The buffer 41 pre-stores the image data of the n-1th frame (n is a natural number, the n-1th frame represents the previous frame, and the nth frame represents the current frame; when n=1, the buffer stores an initial Data), and after outputting the image data of the n-1th frame, update its storage content to the image data of the nth frame for a while.

The first lookup table 43 includes the first subframe overdrive grayscale of the nth frame corresponding to the image data of the n-1th frame and the first subframe interpolation data of the nth frame. The image data of the n-1th frame is the starting gray level of the nth frame, and the first subframe interpolation data of the nth frame is the target gray level of the nth frame, and the first subframe of the nth frame is overdriven. The gray level is the overdrive gray level required to reach the target gray level from the starting gray level.

The second lookup table 45 includes the image data of the n-1th frame and the nth frame. The second subframe of the nth frame corresponding to the second subframe interpolation data overdrives the grayscale. The image data of the n-1th frame is the starting grayscale of the nth frame, and the second subframe interpolating data of the nth frame is also the target grayscale of the nth frame, and the second subframe of the nth frame passes The driving gray level is the overdrive gray level required to reach the other target gray level from the starting gray level.

Specifically, the overdrive grayscales in the first lookup table 43 and the second lookup table 45 are based on the initial grayscale and the target grayscale and are subjected to a Motion Picture Response Time (MPRT) algorithm. The best overdrive gray scale is obtained. The dynamic image response time algorithm includes two parameters, namely, edge residual time BET (Blur Edge Time) and overdrive degree P _overshoot . The edge afterimage time BET represents the time when the residual image is detected on the screen after the driving gray scale is applied. Generally, the larger the gray scale of the overdrive, the less the residual image time BET of the image, and the greater the improvement of the residual image. The overdrive degree P _overshoot represents the degree of image jitter and flicker measured by applying an overdrive gray scale. Generally, the larger the overdrive gray scale, the larger the overdrive degree P _{overshoot, the} greater the jitter and flicker of the screen. It is generally considered that When the overdrive degree P _{overshoot is} less than a set value (for example, 103%, which can be defined according to actual conditions), the jitter and flicker of the screen are within the acceptable range of the human eye. Among them, the calculation formula of the overdrive degree Povershoot is as follows:

Wherein, L _init represents the initial brightness of the picture before the application of the gray scale is applied; L _targ represents the target brightness of the picture to be achieved by applying the overdrive gray level; L _overshoot represents the jitter and flicker of the picture when the overdrive gray scale is driven The maximum or minimum brightness. According to the initial gray scale and the target gray scale and by the dynamic image response time algorithm, the method for selecting the best overdrive gray scale is as follows: according to the initial gray scale and the target gray scale, different overdrive gray scales are provided. Calculate the edge afterimage time BET and overdrive degree P _overshoot of the screen corresponding to different overdrive gray scales; select the edge afterimage time BET if the overdrive degree P _{overshoot is} less than the set value (eg: 103%) The least overdrive grayscale is the best overdrive grayscale. All overdrive gray levels in the first lookup table 43 and the second lookup table 45 are obtained by the dynamic image response time algorithm.

The scan driving circuit 20 is for scanning the liquid crystal display panel 10. The data driving circuit 30 is configured to generate a complex gray scale voltage according to the first sub-frame overdrive gray scale and the second sub-frame overdrive gray scale, and apply the complex gray scale voltage to the liquid crystal display panel 10 when being scanned The liquid crystal display panel 10.

The liquid crystal display panel 10 includes a plurality of scanning lines 11 arranged in parallel, a plurality of data lines 13 parallel to each other and perpendicular to the scanning lines 11, and a plurality of pixel units defined by the scanning lines 11 and the data lines 13 and arranged in a matrix. 15. Each of the pixel units 15 includes a thin film transistor 151, a pixel electrode 153, a common electrode 155 disposed opposite the pixel electrode 153, and a liquid crystal layer disposed between the pixel electrode 153 and the common electrode 155. (not shown). The gate, the source and the drain of the thin film transistor 151 are respectively connected to the corresponding scan line 11, the data line 13, and the pixel electrode 153. The pixel electrode 153, the liquid crystal layer and the common electrode 155 form a liquid crystal capacitor 157. The plurality of scanning lines 11 are connected to the scan driving circuit 20, respectively. The plurality of data lines 13 are connected to the data driving circuit 30, respectively.

Taking the nth frame as an example, the operation principle of the liquid crystal display 1 is as follows: an external circuit (not shown) outputs the image data of the nth frame to the interpolation processor 50 and the buffer 41. The interpolation processor 50 receives the image data of the nth frame, and performs black insertion or gray insertion processing on the image data of the nth frame according to the grayscale size of the image data of the nth frame.

Specifically, when the gray level of the image data of the nth frame is less than or equal to a predetermined value (such as 160 gray scale), the black insertion processor 53 performs black insertion processing on the image data of the nth frame. Outputting the first subframe interpolation data of the nth frame and the second subframe interpolation data, wherein a gray level of the first subframe interpolation data of the nth frame is higher than a gray level of the image data of the nth frame, The second sub-frame interpolation data of the nth frame is black picture data. For example, when the gray level of the image data of the nth frame is 100 gray scale, the first and second subframe interpolation data output by the black insertion processor 53 are respectively 170 and 0 gray scales.

When the gray level of the image data of the nth frame is greater than the predetermined value, the gray insertion processor 55 performs dynamic gray insertion processing on the image data of the nth frame, and outputs the first subframe of the nth frame. Interpolation data and second sub-frame interpolation data. The grayscale of the first subframe interpolation data of the nth frame is greater than the grayscale of the image data of the nth frame, and the grayscale of the second subframe interpolation data of the nth frame is smaller than the image of the nth frame. Like the gray level of the data, the sum of the gray levels of the first and second sub-frames is substantially equal to twice the gray level of the target. For example, when the gray level of the image data of the nth frame is 200 gray scale, the first and second subframe interpolation data output by the gray insertion processor 55 are 220 and 180 gray scales, respectively.

The first sub-frame interpolation of the n-th frame received by the overdrive processor 40 Material and second sub-frame interpolation data. The buffer 41 outputs the image data of the n-1th frame stored therein to the first lookup table 43 and the second lookup table 45. The first subframe interpolation data of the nth frame is supplied to the first lookup table 43; the second subframe interpolation data of the nth frame is supplied to the second lookup table 45. The first lookup table 43 outputs the first sub-frame overdrive grayscale of the nth frame to the data driving circuit 30 according to the image data of the n-1th frame and the first subframe interpolation data of the nth frame; The second lookup table 431 outputs the second sub-frame overdrive grayscale of the nth frame to the data driving circuit 30 according to the image data of the n-1th frame and the second subframe interpolation data of the nth frame.

Generally, when the gray level of the image data of the n-1th frame is smaller than the gray level of the first (or second) subframe interpolation data of the nth frame, that is, the starting gray level is smaller than the target gray level, the nth The first (or second) subframe overdrive gray level is greater than the grayscale of the first (or second) subframe interpolation data of the nth frame; when the grayscale of the image data of the n-1th frame When the grayscale of the first (or second) subframe interpolation data is greater than the nth frame, that is, the initial grayscale is greater than the target grayscale, the first (or second) subframe of the nth frame is less than the grayscale of the overdrive The grayscale of the first (or second) subframe of the nth frame is interpolated.

For example, when the grayscale of the image data of the n-1th frame is 80, the starting grayscale is 80; the grayscales of the first and second subframes of the nth frame are 170 and 0 respectively. The target gray level of the nth frame is 170 and 0 respectively; then the first subframe of the nth frame outputted by the first query table 43 has an overdrive gray level of 200, which is higher than the target gray level of the nth frame. 170. The second subframe of the nth frame output by the second lookup table 45 has an overdrive gray level of zero. When the grayscale of the image data of the n-1th frame is 230, the starting grayscale is 230; the first nth frame First, the gray levels of the second sub-frame interpolation data are 220 and 180 respectively, that is, the target gray levels of the n-th frame are 220 and 180 respectively; then the first sub-frame of the n-th frame output by the first query table 43 passes The driving gray level is 210, which is lower than the target gray level 220 of the nth frame, and the second sub-frame of the nth frame outputted by the second query table 45 has an overdrive gray level of 164, which is lower than the target of the nth frame. Grayscale 180.

The data driving circuit 30 generates the first sub-frame overdrive gray scale voltage and the second number of the n-th frame according to the first sub-frame overdrive gray scale and the second sub-frame overdrive gray scale of the nth frame. The sub-frame overdrives the gray scale voltage. Generally, when the first (or second) subframe of the nth frame is overdrived by a grayscale greater than the first (or second) subframe interpolation data of the nth frame, the nth frame is The one (or second) sub-frame overdrive gray scale voltage is greater than the gray scale voltage corresponding to the first (or second) sub-frame interpolation data of the nth frame; when the first (or second) sub-frame of the nth frame When the frame overdrive gray level is smaller than the gray level of the first (or second) subframe interpolation data of the nth frame, the first (or second) subframe overdrive gray scale voltage of the nth frame is smaller than the nth frame The grayscale voltage corresponding to the first (or second) subframe interpolation data of the frame.

Please refer to FIG. 2 together for the signal waveform diagram of the liquid crystal display. The nth frame time is divided into an equal first subframe time T1 and a second subframe time T2. During the first sub-frame time T1, the scan driving circuit 20 sequentially applies a scan signal to each column of scan lines 11. During the period of the scan pulse signal, a row of thin film transistors 151 connected to the scan line 11 is turned on. At the same time, the data driving circuit 30 applies the plurality of first sub-frame overdrive gray scale voltages to the source of the corresponding thin film transistor 151 by the data line 13, and transmits the drain through the thin film transistor 151 to the source. painting The element electrode 153 is such that the liquid crystal capacitor 157 of the column is in a charging state, and after the charging is completed, the liquid crystal capacitor 157 maintains the first sub-frame overdrive gray scale voltage in the first sub-frame time T1. Since the voltage of the common electrode 155 is a stable common voltage, and the first sub-frame overdrive voltage of the pixel electrode 153 is greater than or less than the gray scale voltage corresponding to the first sub-frame interpolation data, the common electrode 155 is The voltage difference between the pixel electrodes 153 (ie, the liquid crystal capacitor 157) causes the response speed of the liquid crystal molecules to increase and reaches the gray level corresponding to the first sub-frame interpolation data (ie, the target gray level) within a specified time.

After the scan pulse signal is applied to the last scan line 11, the second sub-frame time T2 is entered. In the second sub-frame time T2, the scan driving circuit 20 continuously generates a plurality of scan pulse signals and sequentially applies to each of the scan lines 11. During the operation of the scan pulse signal, a row of thin film transistors 151 connected to the scan line 11 is turned on. At the same time, the data driving circuit 30 applies the second sub-frame overdrive gray scale voltage to the source of the corresponding thin film transistor 151 by the data line 13, and transmits the drain through the thin film transistor 151 to the source. The pixel electrode 153 is such that the liquid crystal capacitor 157 of the column is in a charging state, and after the charging is completed, the liquid crystal capacitor 157 maintains the second sub-frame overdrive gray scale voltage in the second sub-frame time T2. After the scan pulse signal is applied to the last scan line 11, the liquid crystal display 1 completes the display of the nth frame picture. Similarly, since the voltage of the common electrode 155 is stable, and the second sub-frame driving voltage of the pixel electrode 153 is greater than or less than the gray-scale voltage corresponding to the second sub-frame interpolation data, the voltage difference of the liquid crystal capacitor 157 The response speed of the liquid crystal molecules is increased to reach the gray level corresponding to the second sub-frame interpolation data (ie, the target gray level) within a specified time.

It should be noted that, if the interpolation processor 50 performs black insertion processing on the image data of the nth frame according to the black insertion processor 53, the pixel unit 15 will be in the first subframe time T1. The first sub-frame is driven by the gray-scale voltage to quickly respond to display a normal picture; and during the second sub-frame time T2, the pixel unit 15 will overdrive the gray-scale voltage in the second sub-frame. Driven, it responds quickly and displays a black screen. If the interpolation processor 50 performs gray insertion processing on the image data of the nth frame according to the gray insertion processor 55, the pixel unit 15 will be in the first subframe in the first subframe time T1. Driven by the overdrive gray scale voltage, a high luminance picture higher than the target gray level of the nth frame is displayed; and during the second subframe time T2, the pixel unit 15 will overdrive the gray in the second subframe Driven by the step voltage, a low-brightness picture lower than the target gray level of the nth frame is displayed, but the total brightness of the nth frame picture is guaranteed to be unchanged.

Compared with the prior art, the liquid crystal display 1 of the present invention includes an overdrive processor 40, which respectively performs driving processing on the first and second sub-frame interpolation data outputted by the interpolation processor 50, and outputs a first and a first The second sub-frame overdrives the gray scale to the data driving circuit 30. When the liquid crystal display panel 10 is scanned, the data driving circuit 30 correspondingly outputs a first sub-larger or smaller than the gray-scale voltage corresponding to the first sub-frame interpolation data. The frame overdrive gray scale voltage, and the second sub-frame that is greater than or less than the gray scale voltage corresponding to the second sub-frame interpolation data overdrives the gray scale voltage to the pixel electrode of the liquid crystal display panel 10, and further the liquid crystal capacitor 157 The voltage difference causes the response speed of the liquid crystal molecules to be accelerated, and the liquid crystal molecules are easily twisted to the target gray scale to achieve the target brightness, and the residual image phenomenon of the liquid crystal display 1 is improved, and the display quality is improved.

In addition, after receiving the image data, the interpolation processor 50 first determines the grayscale size of the image data, and performs black insertion processing on the image data of the smaller grayscale; and inserts grayscale image data into the grayscale image. The liquid crystal display of the liquid crystal display 1 of the present invention has a large contrast ratio with respect to the liquid crystal display in which the image data is only subjected to the ash processing.

Moreover, the first lookup table 43 is based on the initial grayscale and the target grayscale and obtains an optimal overdrive grayscale value by the dynamic image response time algorithm, which ensures that the first subframe overdrive grayscale system In the case that the overdrive degree P _{overshoot is} less than the set value, the edge afterimage time BET is at least the driving gray scale, and the liquid crystal display 1 achieves the minimum edge afterimage time BET while the image jitter and the degree of flicker are in the human eye. The liquid crystal display 1 has a good display quality within an acceptable range.

The liquid crystal display 1 of the present invention may also have other various design changes. For example, the overdrive processor 40 may omit the second lookup table 45 and perform only one of the first sub-frame interpolation data and the second sub-frame interpolation data. Overdrive processing, and then only one subframe time of the first subframe time T1 and the second subframe time T2 is overdriven grayscale application time, and the display quality of the liquid crystal display 1 can be improved to some extent; The driving processor 40 can also omit the second query table 45, and the first sub-frame interpolation data and the second sub-frame interpolation data are overdriven by the first query table 43.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or variations in accordance with the spirit of the present invention. All should be covered by the following patent application.

1‧‧‧LCD display

10‧‧‧LCD panel

20‧‧‧Scan drive circuit

30‧‧‧Data Drive Circuit

40‧‧‧Overdrive processor

50‧‧‧Interpolation processor

11‧‧‧ scan line

13‧‧‧Information line

15‧‧‧ pixel unit

151‧‧‧film transistor

151‧‧‧ pixel electrodes

153‧‧‧Common electrode

157‧‧‧Liquid Crystal Capacitor

41‧‧‧buffer

43‧‧‧First inquiry form

45‧‧‧ second questionnaire

53‧‧‧Black processor

55‧‧‧Insert processor

1 is a schematic view showing the circuit structure of a preferred embodiment of the liquid crystal display of the present invention.

2 is a signal waveform diagram of the liquid crystal display shown in FIG. 1.

1‧‧‧LCD display

10‧‧‧LCD panel

20‧‧‧Scan drive circuit

30‧‧‧Data Drive Circuit

40‧‧‧Overdrive processor

50‧‧‧Interpolation processor

11‧‧‧ scan line

13‧‧‧Information line

15‧‧‧ pixel unit

151‧‧‧film transistor

153‧‧‧ pixel electrodes

155‧‧‧Common electrode

157‧‧‧Liquid Crystal Capacitor

41‧‧‧buffer

43‧‧‧First inquiry form

45‧‧‧ second questionnaire

53‧‧‧Black processor

55‧‧‧Insert processor

Claims (26)

A liquid crystal display comprising: a controller and a data driving circuit, wherein the controller is configured to receive an image data, and first generate a first sub-frame interpolation data and a second sub-frame interpolation data according to the image data of the current frame And outputting, according to the first and second sub-frame interpolation data and the image data of the previous frame, a first sub-frame overdrive gray scale and a second sub-frame overdrive gray scale to the data driving circuit, the controller An interpolation processor and an overdrive processor are configured to generate the first subframe interpolation data and the second subframe interpolation data, where the overdrive processor is configured to generate the first subframe overdrive grayscale and The second sub-frame overdrives the grayscale, the overdrive processor includes a buffer, a first lookup table, and a second lookup table, where the buffer stores the image data of the previous frame, the first lookup table The first sub-frame overdrive gray level corresponding to the image data of the previous frame and the first sub-frame interpolation data of the current frame, the second query table includes the image data of the previous frame and the second frame of the current frame. Subframe interpolation data corresponding to the Two overdrive gray subframe, the first overdrive lookup table and a second lookup table of the system is less than a gray level value is set in the case, an edge blur of time BET minimum degree of overdrive overdrive P _overshoot grayscale. The liquid crystal display of claim 1, further comprising a liquid crystal display panel, wherein the data driving circuit overdrives the gray scale and the second sub-frame according to the first sub-frame when the liquid crystal display panel is scanned The driving gray scale sequentially applies the overdrive gray scale voltage of the plurality of first subframes and the plurality of second subframes to the liquid crystal display panel. The liquid crystal display according to claim 1, wherein the interpolation processor determines the grayscale size of the image data of the current frame, and then performs black insertion or gray insertion processing on the image data of the current frame. The liquid crystal display of claim 3, wherein the interpolation processor comprises a black insertion processor, and if the gray level of the image data of the current frame is less than or equal to a predetermined value, the black insertion processor generates The first subframe interpolation data and the second subframe interpolation data. The liquid crystal display of claim 4, wherein the interpolation processor further comprises a gray insertion processor, wherein the gray insertion processor generates the grayscale if the grayscale of the image data of the current frame is greater than the predetermined value The first subframe interpolation data and the second subframe interpolation data. The liquid crystal display according to claim 1, wherein the overdrive gray scale of the first lookup table and the second lookup table is based on the initial grayscale and the target grayscale and a dynamic image response time The algorithm achieves the best overdrive grayscale. The liquid crystal display according to claim 1, wherein the calculation formula of the overdrive degree P _overshoot is as follows: Wherein, L _init represents the initial brightness of the picture before the application of the gray scale is applied; L _targ represents the target brightness of the picture to be achieved by applying the overdrive gray level; L _overshoot represents the jitter and flicker of the picture when the overdrive gray scale is driven The maximum or minimum brightness. The liquid crystal display of claim 2, further comprising a scan driving circuit for scanning the liquid crystal display panel. The liquid crystal display device of claim 8, wherein the liquid crystal display panel comprises a plurality of scan lines, a plurality of data lines, and a plurality of pixel units defined by the scan lines and the data lines, wherein the plurality of scan lines are respectively connected. To the scan driving circuit; the plurality of data lines are respectively connected to the data driving circuit. The liquid crystal display of claim 9, wherein each pixel unit comprises a thin film transistor, a pixel electrode, a common electrode, and a liquid crystal layer disposed between the pixel electrode and the common electrode. (not shown), the gate, the source and the drain of the thin film transistor are respectively connected to their corresponding scan lines, data lines and pixel electrodes, and the pixel electrodes, the liquid crystal layer and the common electrode form a liquid crystal capacitance. A liquid crystal display comprising: an interpolation processor, an overdrive processor, and a data driving circuit, wherein the interpolation processor is configured to sequentially receive image data of each frame and generate a first image according to image data of the current frame a sub-frame interpolation data and a second sub-frame interpolation data to the over-drive processor; the over-drive processor interpolates the data according to the first and second sub-frames and the image of the previous frame The data generates a sub-frame overdrive gray scale; the data driving circuit receives the overdrive gray scale of the sub-frame and the another sub-frame interpolation data, the overdrive processor includes a buffer and a lookup table, the buffer The image data of the previous frame is stored in the first query table, and the image of the previous frame includes one frame of the current frame corresponding to one of the current frame interpolation data, and the query is grayscale. The overdrive gradation of the table is the overdrive gradation of the edge afterimage time BET with the overdrive degree P _{overshoot being} less than a set value. The liquid crystal display of claim 11, further comprising a liquid crystal display panel, wherein the data driving circuit drives the gray scale and the another sub-frame according to the sub-frame when the liquid crystal display panel is scanned The interpolation data sequentially applies a complex gray scale voltage to the liquid crystal display panel. The liquid crystal display according to claim 12, wherein the interpolation processor determines the grayscale size of the image data of the current frame, and then performs black insertion or gray insertion processing on the image data of the current frame. The liquid crystal display according to claim 13, wherein the interpolation processor comprises a black insertion processor, and if the gray level of the image data of the current frame is less than or equal to a predetermined value, the black processor outputs The first subframe interpolation data and the second subframe interpolation data. The liquid crystal display of claim 14, wherein the interpolation processor further comprises a gray insertion processor, if the gray level of the image data of the current frame is greater than the predetermined value, the gray insertion processor outputs the The first subframe interpolation data and the second subframe interpolation data. The liquid crystal display of claim 11, wherein the overdrive gray scale of the lookup table is optimally driven according to the initial gray scale and the target gray scale and by a dynamic image response time algorithm. Grayscale. The liquid crystal display according to claim 11, wherein the calculation formula of the overdrive degree P _overshoot is as follows: Wherein, L _init represents the initial brightness of the picture before the application of the gray scale is applied; L _targ represents the target brightness of the picture to be achieved by applying the overdrive gray level; L _overshoot represents the jitter and flicker of the picture when the overdrive gray scale is driven The maximum or minimum brightness. The liquid crystal display of claim 12, further comprising a scan driving circuit for scanning the liquid crystal display panel. The liquid crystal display device of claim 18, wherein the liquid crystal display panel comprises a plurality of scan lines, a plurality of data lines, and a plurality of pixel units defined by the scan lines and the data lines, the plurality of scan lines being respectively connected To the scan driving circuit; the plurality of data lines are respectively connected to the data driving circuit. The liquid crystal display of claim 19, wherein each pixel unit comprises a thin film transistor, a pixel electrode, a common electrode, and a liquid crystal layer disposed between the pixel electrode and the common electrode. (not shown), the gate, the source and the drain of the thin film transistor are respectively connected to their corresponding scan lines, data lines and pixel electrodes, and the pixel electrodes, the liquid crystal layer and the common electrode form a liquid crystal capacitance. A liquid crystal display driving method, the liquid crystal display comprising a liquid crystal display panel, the driving method comprising the steps of: a. providing image data of a current frame, and generating a first sub-frame interpolation of a current frame according to image data of the current frame; Data and second sub-frame interpolation data; b. providing image data of the previous frame, and generating a first subframe according to the first sub-frame interpolation data, the second sub-frame interpolation data, and the image data of the previous frame Overdrive gray scale and a second sub-frame overdrive gray scale; and c. generating a complex gray scale voltage according to the first and second sub-frame overdrive gray scales, and applying the complex gray when the liquid crystal display panel is scanned The step voltage is applied to the liquid crystal display panel, and the first sub-frame overdrive gray scale and the second sub-frame overdrive gray scale in the step b are obtained by a dynamic image response time algorithm to obtain an optimal overdrive gray scale. The optimal overdrive gray scale refers to an overdrive gray scale with a minimum edge burn time BET when the overdrive degree P _{overshoot is} less than a set value. The method for driving a liquid crystal display according to claim 21, wherein the step a specifically includes: determining a grayscale size of the image data of the current frame, if the grayscale of the image data of the current frame is less than or When it is equal to a predetermined value, the image data of the current frame is black-processed; when the grayscale of the image data of the current frame is greater than the predetermined value, the image data of the current frame is subjected to gray insertion processing. The driving method of the liquid crystal display according to claim 21, wherein the calculation formula of the overdrive degree P _overshoot is as follows: Wherein, L _init represents the initial brightness of the picture before the application of the gray scale is applied; L _targ represents the target brightness of the picture to be achieved by applying the overdrive gray level; L _overshoot represents the jitter and flicker of the picture when the overdrive gray scale is driven The maximum or minimum brightness. A liquid crystal display driving method, the liquid crystal display comprising a liquid crystal display panel, the driving method comprising the steps of: a. providing image data of a current frame, and generating a first sub-frame interpolation of a current frame according to image data of the current frame; Data and second sub-frame interpolation data; b. providing image data of the previous frame, and generating one of the interpolated data of the first sub-frame interpolation data and the second sub-frame interpolation data and the image data of the previous frame a sub-frame overdrive gray scale; and c. generating a complex gray scale voltage according to the sub-frame overdrive gray scale and another sub-frame interpolation data, and applying the complex gray scale voltage to the liquid crystal when the liquid crystal display panel is scanned In the display panel, the sub-frame overdrive gray scale in step b is obtained by a dynamic image response time algorithm, and the optimal overdrive gray scale means that the overdrive degree P _{overshoot is} less than a setting. In the case of a value, the edge afterimage time BET is at least the driving gray level. The method for driving a liquid crystal display according to claim 24, wherein the step a specifically includes: determining a grayscale size of the image data of the current frame, if the grayscale of the image data of the current frame is less than or When the value is equal to a predetermined value, the image data of the current frame is black-processed; if the grayscale of the image data of the current frame is greater than the predetermined value, the image data of the current frame is gray-polluminated. The driving method of the liquid crystal display device according to claim 24, wherein the calculation formula of the overdrive degree P _overshoot is as follows: Wherein, L _init represents the initial brightness of the picture before the application of the gray scale is applied; L _targ represents the target brightness of the picture to be achieved by applying the overdrive gray level; L _overshoot represents the jitter and flicker of the picture when the overdrive gray scale is driven The maximum or minimum brightness.