CN101286303B - Liquid crystal display device and image display method thereof - Google Patents

Abstract

The invention discloses an image display method of a liquid crystal display device, which is used for driving a plurality of pixels when a first frame and a second frame are displayed in sequence, and the method comprises the following steps: detecting a gray scale difference between the first frame and the second frame to judge the change of a driving mode between the first frame and the second frame; adjusting the proportion of the number of the pixels driven in a dynamic mode and a static mode in the second frame according to the change of the driving mode; and outputting the most gray scale data corresponding to the pixel when outputting the second frame. The sudden and violent change of the brightness of the image when the driving mode is changed can be avoided, the user can not feel the image to generate the surge, and the liquid crystal display device and the image display quality thereof can be improved.

Description

Liquid crystal display device and image display method thereof

technical field

The present invention relates to a liquid crystal display device and its driving method, in particular to a liquid crystal display device using black (gray) insertion technology and its image display method.

Background technique

In order to enhance the display effect of liquid crystal display devices, image data pulses are often shortened by adding sub-frames, which is called pulse-like liquid crystal display technology. The common one in the prior art is to add a normal display A normally black subframe can be called a black-inserting or gray-inserting technique.

In the image display method of the liquid crystal display device in the prior art, the pixels on the display surface are driven in the dynamic/static mode in the same frame according to the dynamic/static characteristics of the frame, that is, when the pixels are to be driven in the dynamic mode It is realized by the aforementioned method of inserting black (gray) pictures. When the pixels are to be driven in a static mode, there is no need to insert other dark pictures.

As shown in FIG. 1 , two adjacent pixels 101 and 102 respectively receive grayscale data A and B and display them in the same frame time (frame time) Tf. Please refer to FIG. 2 , the first common image display technology of pulse-like liquid crystal devices in the prior art is to complement the image frequency multiplication technology when the pixels 101 and 102 receive the grayscale data A and B. A normally black sub-frame (normally black sub-frame), such as a sub-frame with a grayscale value of 0, makes pixels 101 and 102, as shown in FIG. subframe, and a black picture in the second half frame time. In this way, according to the human eye-tracking model, applying this prior art black frame insertion method can effectively halve the blur width.

However, due to the black frame insertion method of this prior art, the pixels only display grayscale data correctly in half of the time, while the other half of the time is a normal black picture with grayscale data of 0, so the brightness of the picture will be reduced. Halved, affect the image effect.

In order to improve the problem of halving the brightness of pixels caused by the method of inserting black images, the second common image display technology of pulse-like liquid crystal display devices in the prior art is to provide a method that does not affect the equivalent brightness of the image. See Figure 3. When pixels 101 and 102 receive grayscale data A and B, the prior art method allows pixel 101 to display subframes A' and C in sequence, and pixel 102 to display subframe B' in sequence according to a predetermined principle. with D. Pixel 101 displays the average luminance of subframes A' and C within the frame time Tf, which is the same as the brightness effect of directly displaying grayscale data A within the entire frame time Tf in FIG. 1 ; while pixel 102 displays subframes within the frame time Tf The average luminance of B' and D is the same as the luminance effect of directly displaying the grayscale data B within the whole frame time Tf in FIG. 1 .

Please refer to FIG. 4 again. The look-up table 110 shown in FIG. 4 is an example of a predetermined principle used when generating subframes in the prior art method shown in FIG. 3 . For example, according to FIG. 3 and FIG. 4 , the second type of pulsed liquid crystal display technology in the prior art will sequentially display two sub-frames with gray-scale data of 250 and 0 when a pixel receives an original gray-scale data of 150 and when a pixel receives an original grayscale data 151, two sub-frames with grayscale data of 255 and 0 are displayed in sequence. In the comparison table 110 shown in FIG. 4, when the original grayscale value is less than 151, a black frame will be supplemented, that is, a second subframe with grayscale data of 0 and a matching first subframe will be generated, so that The combined brightness effect of the two sub-frames is equal to the brightness of the original gray scale value. When the original grayscale value is greater than 152, a first subframe with grayscale data of 255 and a corresponding second subframe will be added, so that the combined brightness effect of the two subframes is equal to the brightness of the original grayscale value. . In general image data, the gray scale values of adjacent pixels are often similar. Therefore, if the original grayscale values of the two pixels 101 and 102 in FIG. If it is greater than 152, the grayscale values A' and B' of the sub-frame will be equal to 255. Both of these two situations can effectively reduce the blur width of the dynamic image without affecting the brightness of the displayed image.

However, in the above-mentioned second prior art, when the image continues to be in the dynamic mode, replacing the inserted black image with the gray image can indeed improve the flickering of the dynamic image, but when the image changes from dynamic to static, all The pixels are driven from the dynamic mode to the static mode. In this way, the brightness of the entire image suddenly increases because the image is converted to static without supplementary gray screen, and the user will feel the image surge. Furthermore, the image quality of the liquid crystal display device is degraded.

Therefore, how to provide a liquid crystal display device and an image display method thereof to avoid the occurrence of the above-mentioned problems and improve the above-mentioned shortcomings is an important issue.

Contents of the invention

The present invention provides a liquid crystal display device and an image display method thereof in order to overcome the above-mentioned defects in the prior art, so as to reduce the image surge generated when the driving mode is switched.

In order to achieve the above object, according to an image display method of a liquid crystal display device of the present invention, a plurality of pixels are driven when sequentially displaying a first frame and a second frame, and the method includes: detecting the first frame A gray-scale difference between the second frame and the second frame is used to determine a change in a driving mode between the first frame and the second frame; according to the change in the driving mode, adjust a The proportion of the number of pixels driven in a dynamic mode and driven in a static mode; and the majority of grayscale data corresponding to the pixels in the second frame output.

To achieve the above object, a liquid crystal display device according to the present invention is used to drive a plurality of pixels when sequentially displaying a first frame and a second frame, and the liquid crystal display device includes a detection circuit and an adjustment circuit and a grayscale conversion circuit. The detection circuit detects a gray scale difference between the first frame and the second frame to judge the change of a driving mode between the first frame and the second frame to output a driving mode conversion judgment signal; the adjustment circuit is an electrical connection detection The circuit adjusts the ratio of the number of pixels driven in a dynamic mode and driven in a static mode in the second frame by changing the signal according to the driving mode; and the grayscale conversion circuit is electrically connected to the adjustment circuit, and outputs according to the ratio of the number of pixels The corresponding grayscale data of each pixel.

To achieve the above object, a liquid crystal display device according to the present invention includes a plurality of pixels and a control circuit, wherein the pixels are used to display a first frame and a second frame of data, and some pixels are driven in a dynamic mode , the rest of the pixels are driven in a static mode; the control circuit is used to determine the ratio of the number of pixels driven in the dynamic mode to the static mode.

According to the liquid crystal display device and image display method of the present invention, when the driving mode between the first frame and the second frame changes, the proportion of the number of pixels driven in a dynamic mode and in a static mode is adjusted in the second frame , not to let all the pixels display the second frame in dynamic mode or static mode. In this way, it is possible to avoid a sudden sharp change in the brightness of the image when the driving mode is changed, so that the user is less likely to feel the image surge, thereby improving the quality of the liquid crystal display device and its image display.

Description of drawings

The features, properties and advantages of the present invention are further described by the following examples and accompanying drawings.

FIG. 1 is a schematic diagram of two pixels respectively receiving grayscale data in the prior art;

Fig. 2 is a schematic diagram of two pixels respectively receiving gray scale data in the prior art and frequency doubling according to the first prior art technique;

Fig. 3 is a schematic diagram of two pixels receiving grayscale data respectively in the prior art and frequency multiplication according to the second prior art technique;

Fig. 4 is the comparison table that the prior art is the second existing frequency doubling technology;

5 is a flowchart of an image display method of a liquid crystal display device according to a preferred embodiment of the present invention;

FIG. 6A and FIG. 6B are schematic diagrams of image inner blocks in an image display method of a liquid crystal display device according to a preferred embodiment of the present invention;

7A to 7E are schematic diagrams of each block in an image display method of a liquid crystal display device according to a preferred embodiment of the present invention;

8 is a schematic diagram of a liquid crystal display device according to a preferred embodiment of the present invention;

Fig. 9 is a schematic diagram of the adjustment circuit in Fig. 8;

10A to 10D are schematic diagrams of the driving mode table in FIG. 9;

11 is another schematic diagram of a liquid crystal display device according to a preferred embodiment of the present invention; and

FIG. 12 is a schematic diagram of the grayscale conversion circuit in FIG. 11 .

The symbols of the main components in the figure are explained as follows:

101, 102: pixels

110: Comparison table

Tf: frame time

S01-S04: steps of image display method of liquid crystal display device

2: Liquid crystal display device

20: framebuffer

21: Frame buffer controller

22: Input buffer

23: output buffer

24: Detection circuit

25: Adjustment circuit

251: Counter

252: Drive mode table

253: Multiplexer

254: counter

26: Gray scale conversion circuit

261: Multiplexer

262: Dynamic high grayscale table

263: Dynamic low grayscale table

264: static grayscale table

265: Static high grayscale table

266: static low grayscale table

267: gray scale table source

S _D/S : Drive mode switching judgment signal

S _H/L : Subframe switching signal

S _mux : pixel driving mode switching signal

Val: count value

Detailed ways

A liquid crystal display device and an image display method thereof according to preferred embodiments of the present invention will be described below with reference to related drawings.

First, please refer to FIG. 5 to FIG. 7E to illustrate an image display method of a liquid crystal display device according to a preferred embodiment of the present invention.

As shown in FIG. 5, an image display method of a liquid crystal display device according to a preferred embodiment of the present invention is used to drive a plurality of pixels when sequentially displaying a first frame and a second frame. The image display method Including steps S01-S04.

In step S01 , a gray level difference between the first frame and the second frame is firstly detected to determine a change of a driving mode between the first frame and the second frame.

In step S02 , according to the change of the driving mode, the ratio of the number of pixels driven in a dynamic mode and driven in a static mode in the second frame is adjusted.

In step S03, most grayscale data corresponding to the pixels in the second frame are output.

In step S04 , a liquid crystal display panel is driven according to most of the gray scale data corresponding to the pixels in the second frame.

In order to improve the existing technology, when the image signal changes from a dynamic frame to a static frame or when a video signal changes from a static frame to a dynamic frame, it is easy to cause a sudden change in the brightness of the screen due to the change of the frame driving mode, thereby causing The user can detect the surge. Therefore, the image display method of this embodiment is to adjust the ratio of the number of pixels driven in the dynamic mode and the static mode in the next frame when the frame driving mode changes, or adjust the number of pixels driven in the dynamic mode in the next frame And the number of pixels driven in the static mode, it is not like the existing technology can only make all the pixels of the next frame be driven in the dynamic mode or all are driven in the static mode, but let the pixels gradually be driven in the dynamic mode Drive or gradually drive in a static mode, so when the frame drive mode changes, it can reduce the sudden change of screen brightness, thereby reducing the generation of surges. It should be noted that in this embodiment, the driving mode of each pixel may be different. Driving a pixel in a dynamic mode means that the pixel uses the gray interpolation technology of the prior art to display an image signal; and driving a pixel in a static mode means that the pixel is driven in a static mode. The gray interpolation technique is not used to display the image signal.

As shown in FIG. 6A and FIG. 6B, the display screen of a liquid crystal display device can be divided into a plurality of blocks, and most pixels (as shown by dotted lines) are distributed in each block, and the blocks are driven in a dynamic mode as an adjustment and The basic unit of the ratio of the number of pixels driven by the static mode (hereinafter referred to as the ratio of the number of dynamic/static pixels). In addition, the block is not limited to a square matrix, as shown in FIG. 6B , the block is composed of pixels in multiple rows.

As shown in FIGS. 7A to 7B , the block is a 2×2 square matrix. Of course, the number of the square matrix is not limited, and it can also be a square matrix of 8×8 or other sizes. The image display method of the liquid crystal display device can adjust the ratio of dynamic/static pixels in a block. The following is an example of a square matrix with a block size of 2×2.

As shown in FIG. 7A , it is shown that each pixel in the block in the first frame is driven in a dynamic mode. As shown in Figure 7B, when step S01 determines that the driving mode is converted from the dynamic first frame to the static second frame, step S02 is to increase the number of pixels driven in the static mode in the second frame, which is to convert the pixels in the block to The pixel at position 1 is driven in the static mode, and the pixels in other unnumbered positions are still driven in the dynamic mode.

As shown in Figure 7C to Figure 7E, the image display method of the liquid crystal display device also displays a third frame to a fifth frame after the second frame, wherein when the third frame (Figure 7C) is processed, step S02 is gradually Increasing the number of pixels driven in the static mode in the third frame to the fifth frame is to sequentially change the pixels at positions 2, 3, and 4 in the block to be driven in the static mode. In each block, the pixels at the positions without numbers are still driven in the dynamic mode, and until the fifth frame, all the pixels in the block are driven in the static mode.

It should be noted that the order of appearance of the frames in Figure 7A to Figure 7E is related to the change of the driving mode. When the driving mode changes in the opposite direction, that is, when the static frame is converted into a dynamic frame, the driving mode of the pixels in the block changes The scale is changed from the direction of Fig. 7E to Fig. 7A. As shown in FIG. 7E, it shows that each pixel in the block in the first frame is driven in a static mode. As shown in FIG. 7D, when step S01 determines that the driving mode is converted from the static first frame to the dynamic second frame, step S02 is to reduce the number of pixels driven in the static mode in the second frame, which is to change the pixels originally marked as 4 in each block to be driven in the dynamic mode, while other pixels with marked numbers still use the Static mode to drive.

As shown in Figure 7C to Figure 7A, the image display method of the liquid crystal display device also displays the third frame to the fifth frame after the second frame, wherein when the third frame is processed, step S02 is to gradually reduce the third frame to the fifth frame The number of pixels driven in the static mode in the five frames is to change the pixels originally marked as 3, 2, and 1 in each block to be driven in the dynamic mode in sequence. In each block, other pixels marked with numbers are still driven in static mode. Until the fifth frame (as shown in FIG. 7A ), all pixels are driven in dynamic mode.

In addition, if the drive ratio of the frame pixels is adjusted, each pixel in the block is not completely driven in the static mode or in the dynamic mode and the frame driving mode is changed, then only the ratio of the dynamic/static pixel quantity is reversed Just adjust.

For example, as shown in Figure 7A to Figure 7C, the driving mode of the frame is first changed from the dynamic mode to the static mode, but the driving mode is changed to the dynamic mode in the fourth frame, at this time, as long as the order of Figure 7C to Figure 7A Sequentially reduce the number of pixels driven in static mode in each block. Similarly, when the driving mode of the frame is first changed from the static mode to the dynamic mode, if the driving mode of the frame is changed to the static mode during the transition, it is only necessary to increase the number of pixels driven by the static mode in each block. Can.

Next, referring to FIG. 8 to FIG. 11 , an embodiment will be given to describe how the aforementioned liquid crystal display method operates in a liquid crystal display device.

As shown in Figure 8, a liquid crystal display device 2 according to a preferred embodiment of the present invention comprises a frame buffer (frame buffer) 20, a frame buffer controller (frame buffer controller) 21, an input buffer (input buffer) 22, an output buffer (output buffer) 23, a detection circuit 24, an adjustment circuit 25 and a gray scale conversion circuit 26.

The input buffer 22 is to receive each frame data, and the frame buffer controller 21 is electrically connected to the input buffer

Area 22 and frame buffer 20 , and store the received frame data in frame buffer 20 . framebuffer control

The controller 21 is also electrically connected to the detection circuit 24 and the gray scale conversion circuit 26, and is provided from the frame buffer 20

The frame data is processed by the detection circuit 24 and the gray scale conversion circuit 26 .

The detection circuit 24 is to detect a gray scale difference between adjacent frames (frame F _m-1 and frame F _m ) to judge a change of a driving mode between frame F _m-1 and frame F _m , so as to output a driving mode Switching judgment signal S _D/S . The adjustment circuit 25 is electrically connected to the detection circuit 24 to adjust the ratio of the number of pixels driven in a dynamic mode and driven in a static mode in the frame F _m according to the driving mode switching judgment signal S _D/S . The grayscale conversion circuit 26 is electrically connected to the adjustment circuit 25 and outputs corresponding grayscale data of each pixel according to the ratio of the number of pixels.

When the grayscale conversion circuit 26 processes the frame F _m , the detection circuit 24 and the adjustment circuit 25 adjust the driving mode in the dynamic mode and the static mode in the frame F _m according to the change of the driving mode between the frame F _m-1 and the frame F _m . The ratio of the number of pixels driven, or adjust the number of pixels driven in the dynamic mode and the number of pixels driven in the static mode in the frame F _m .

The frame data is input by the input buffer 22, and then output to a data line driving circuit by the output buffer 23 after being processed, and the data line driving circuit writes each pixel data in the frame data to each pixel of a liquid crystal display panel The storage capacitor is used to control the corresponding liquid crystal deflection angle. Since the data line driving circuit, the physical structure of the liquid crystal display panel, and other matching circuits such as the scan line driving circuit are not the focus of this embodiment, they are not shown in the figure and will not be described in detail below.

In this embodiment, the detection circuit 24 subtracts the grayscale data values of the pixels in the frame Fm _-1 and the frame _Fm to obtain a plurality of grayscale differences, and sums the grayscale differences to obtain a total difference, and compare the total difference with a threshold value (threshold value) to generate the driving mode switching judgment signal S _D/S , so as to judge whether the driving mode between the frame F _m-1 and the frame F _m changes.

When the frame F _m-1 driven by the dynamic mode is converted to the frame F _m driven by the static mode, the driving mode conversion judgment signal _SD/S is at a first level, and when the frame F _m-1 converted by the static mode When the frame F _m is dynamic, the drive mode switching judgment signal _SD/S is at a second level.

As shown in FIG. 9 , the adjusting circuit 25 includes a frame counter 251 , a plurality of driving mode tables (matrix tables) 252 , a multiplexer 253 and another counter 254 . Wherein, the counter 251 counts the number of frames after the frame F _m to output a count value Val, and the driving mode table 252 records the information of driving the pixels in the block in the static mode and in the dynamic mode. In each driving mode table, the static mode and the dynamic mode are used. The proportions of the pixels driven in the dynamic mode are different, and the multiplexer 253 selects one of the driving mode tables 252 according to the count value Val to output a pixel driving mode switching signal S _mux .

Please refer to FIG. 8 and FIG. 9 at the same time. The counter 251 is electrically connected to the detection circuit 24 to receive the drive mode conversion judgment signal SD _/S . When the drive mode conversion judgment signal _SD/S changes, the counter 251 is triggered and initialization. If the driving mode switching judgment signal S _D/S is at the first level, the counter 251 is initialized to a minimum value, and the count value Val is increased by 1 every other frame (for example, 60 Hz) as an output; if the driving mode When the switching judgment signal SD _/S is at the second level, the counter 251 is initialized to a maximum value, and the count value Val is decremented by 1 every other frame as an output.

The drive mode table 252 is consistent with the size of the block. Taking the block as a 2x2 square matrix as an example, the adjustment circuit 25 has four drive mode tables 252. The information recorded in each drive mode table 252 is shown in FIGS. 10A to 10D. Wherein, the one marked as 1 in the driving mode table 252 means that the corresponding position in the block will be driven in a static mode, and the one marked as 0 means that the corresponding position in the block will be driven in a dynamic mode. In each driving mode table 252 The quantities marked as 1 vary.

The multiplexer 253 selects one of the driving mode tables 252 according to the count value Val, and outputs each indicated value from the driving mode table 252 row by row and column by row as the pixel driving mode switching signal S _mux .

When the driving mode is converted from the dynamic frame F _m-1 to the static frame F _m , the count value Val increases, and the count value Val increases gradually with the frames F _m+1 and F _m+2 . Therefore, more The processor 253 selects the drive mode table 252 with more 1s in it frame by frame as output, so as to gradually increase the number of pixels driven in the static mode. When the count value Val reaches the maximum value, it means that all the pixels are driven in the static mode.

When the driving mode is converted from the static frame F _m-1 to the dynamic frame F _m , the count value Val is reduced, and the count value Val is gradually reduced with the frames F _m+1 and F _m+2 . Therefore, more The processor 253 selects the drive mode table 252 with more 0s in it as output frame by frame, so as to gradually reduce the number of pixels driven in the static mode. When the count value Val reaches the minimum value, it means that all the pixels are driven in the dynamic mode.

In addition, another counter 254 continuously switches the level of a subframe switching signal _SH/L during two subframes of a frame.

Furthermore, the address corresponding to each pixel in the driving mode table 252 can be changed every other frame. The position of the driving mode can avoid producing a fixed pattern when displaying an image; and when the driving mode table 252 is composed of pixels in multiple rows, the position of the row can be changed arbitrarily or sequentially to change each pixel in the block to be driven differently. way location. In addition, the driving mode table 252 described here can also be replaced by a random number generation table, that is, the positions of pixels driven in the static mode/dynamic mode in the block are not fixed.

Referring again to FIG. 8 , the grayscale conversion circuit 26 includes a multiplexer 261 , a dynamic high grayscale table 262 , a dynamic low grayscale table 263 and a static grayscale table 264 . Among them, the static grayscale table 264 is used to query the grayscale data corresponding to the pixel driven in the static mode, and the dynamic high grayscale table 262 and the dynamic low grayscale table 263 are used to query the corresponding grayscale data of the pixel driven in the dynamic mode. Grayscale data. Usually, the static grayscale table 264 corresponds to the grayscale of the original image video data; the dynamic high grayscale table 262 is brighter than the grayscale of the original image video data; the dynamic low grayscale table 263 is lighter than the grayscale of the original image video data. The level is dark, or a grayscale value that is darker.

The multiplexer 261 selects the grayscale data queried from one of the static grayscale table 264 , the dynamic high grayscale table 262 and the dynamic low grayscale table 263 according to the output pixel driving mode switching signal Smux of the driving mode table 252 as an output. When a certain pixel position is driven in a static mode, during a frame, the multiplexer 261 selects the grayscale data inquired by the static grayscale table 264 as output; when a certain pixel position is driven in a dynamic mode, the multiplexer 261 The device 261 successively selects the grayscale data queried from the dynamic high grayscale table 262 and the dynamic low grayscale table 263 within a frame period according to the subframe switching signal S _H/L as output. The output is provided to the data line driving circuit to write the pixel data into the pixels of the liquid crystal display panel. Therefore, in the same frame, some pixels will be driven in a dynamic mode, and other pixels will be driven in a static mode.

In another embodiment, as shown in FIG. 11 , the static grayscale table 264 can also be realized by a static high grayscale table 265 and a static low grayscale table 266. The dynamic mode is used to drive the pixels, only the gray scale difference between the static high gray scale table 265 and the static low gray scale table 266 can be small. Here, the multiplexer 261 selects the static high gray scale table 265 , the static low gray scale table 266 , the dynamic high gray scale table 262 and the dynamic low gray scale table 263 according to the output pixel driving mode switching signal S _mux of the driving mode table 252 . A queried grayscale data is output. When a certain pixel position is driven in the static mode, the multiplexer 261 successively selects the gray levels queried from the static high gray scale table 265 and the static low gray scale table 266 within one frame period according to the subframe switching signal S _H/L The data is output; when a certain pixel position is driven in a dynamic mode, the multiplexer 261 successively selects the dynamic high gray scale table 262 and the dynamic low gray scale table 263 to be queried within a frame period according to the subframe switching signal _SH/L The grayscale data is output as output.

FIG. 12 discloses an implementation of the grayscale conversion circuit 26 in FIG. 11. As shown in FIG. 12, the grayscale conversion circuit 26 further includes a grayscale table source (LUT pool) 267, which stores a A plurality of grayscale tables are read by the dynamic high grayscale table 262, the dynamic low grayscale table 263, the static high grayscale table 265, and the static low grayscale table 266, so as to screen by picture, row by row, row by column, or row by row The dynamic high grayscale table 262 , the dynamic low grayscale table 263 , the static high grayscale table 265 , and the static low grayscale table 266 are updated pixel by pixel.

In summary, according to the liquid crystal display device and its image display method of the present invention, when the driving mode between the first frame and the second frame changes, it is adjusted to drive in the dynamic mode and in the static mode in the second frame. The ratio of the number of pixels driven does not allow all pixels to display the second frame in dynamic mode or static mode. In this way, it is possible to avoid a sudden sharp change in the brightness of the image when the driving mode is changed, so that the user is less likely to feel the image surge, thereby improving the quality of the liquid crystal display device and its image display.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the claims of the present invention.

Claims (12)

1. An image display method of a liquid crystal display device, for driving a plurality of pixels when sequentially displaying a first frame and a second frame, it is characterized in that the method comprises: Detecting a grayscale difference between the first frame and the second frame to determine a change in a driving mode between the first frame and the second frame; adjusting the proportion of the number of pixels driven in a dynamic mode and driven in a static mode in the second frame according to the change of the driving mode; and Outputting a plurality of grayscale data corresponding to the pixels in the second frame according to the ratio of the number of pixels; wherein, the detecting step includes: subtracting the grayscale data values of the pixels in the first frame and the second frame to obtain a plurality of grayscale difference values; summing the gray scale differences to obtain a total difference; and Comparing the total difference with a threshold value to generate a driving mode conversion judgment signal, so as to judge the change of the driving mode between the first frame and the second frame. 2. The image display method according to claim 1, wherein a third frame to an Nth frame is also displayed after the second frame, wherein N is a natural number greater than 1; the adjusting step comprises: After the driving mode is switched from the dynamic mode in the first frame to the static mode in the second frame, gradually increase the number of pixels driven in the static mode in the third frame to the Nth frame. 3. The image display method according to claim 1, wherein a third frame to an Nth frame is displayed after the second frame, wherein N is a natural number greater than 1, and the adjusting step comprises: After the driving mode is converted from the static mode in the first frame to the dynamic mode in the second frame, gradually reduce the number of pixels driven in the static mode in the third frame to the Nth frame. 4. The image display method according to claim 1, wherein the outputting step comprises: Querying grayscale data corresponding to the pixel in the second frame according to a static grayscale table; Querying grayscale data corresponding to the pixel in the second frame according to a dynamic high grayscale table and a dynamic low grayscale table; and Selecting one of the static grayscale table, the dynamic high grayscale table, and the dynamic low grayscale table as the output of the grayscale data according to a driving mode table, wherein the driving mode table is recorded with Information about whether the pixel is driven in a static mode or in a dynamic mode in the second frame. 5. The image display method according to claim 1, wherein the outputting step comprises: Querying grayscale data corresponding to the pixel in the second frame according to a static high grayscale table and a static low grayscale table; Querying grayscale data corresponding to the pixel in the second frame according to a dynamic high grayscale table and a dynamic low grayscale table; and selecting one of the static high grayscale table, the static low grayscale table, the dynamic high grayscale table and the dynamic low grayscale table as the output of the grayscale data according to a driving mode table, Wherein the driving mode table records the information of driving the pixel in the static mode and the dynamic mode in the second frame. 6. The image display method according to claim 1, wherein the adjusting step comprises: counting the number of frames following the first frame to output a count value; Select one of a plurality of driving mode tables according to the count value, wherein the driving mode table records the information that the pixel is driven in a static mode and a dynamic mode, and in each of the driving mode tables, the static mode and the dynamic mode are used. The proportions of the pixels driven by the modes are not the same; and Outputting a pixel driving mode switching signal according to the information recorded in the selected driving mode table. 7. A liquid crystal display device, characterized in that it comprises: a plurality of pixels for displaying a first frame and a second frame of data, wherein some of the pixels are driven in a dynamic mode, and the rest of the pixels are driven in a static mode; and a control circuit for determining the ratio of the number of pixels driven in the dynamic mode to that driven in the static mode; A detection circuit for detecting a gray scale difference between the first frame and the second frame to determine a change of a driving mode between the first frame and the second frame to output a driving mode change signal, the detection circuit subtracts the grayscale data values of the pixels in the first frame and the second frame to obtain a plurality of grayscale differences, and sums the grayscale differences to obtain obtaining a total difference value, and comparing the total difference value with a threshold value to generate the driving mode conversion judgment signal, so as to judge the change of the driving mode between the first frame and the second frame ; an adjustment circuit electrically connected to the detection circuit to adjust the proportion of the number of pixels driven in a dynamic mode and driven in a static mode in the second frame according to the driving mode change signal; and A grayscale conversion circuit is electrically connected to the adjustment circuit, and outputs corresponding grayscale data of each pixel according to the ratio of the number of pixels. 8. The liquid crystal display device according to claim 7, wherein a third frame to an Nth frame are displayed after the second frame, wherein N is a natural number greater than 1; the adjustment circuit is when After the driving mode is switched from the dynamic mode of the first frame to the static mode of the second frame, the number of pixels driven in the static mode in the third frame to the Nth frame is gradually increased. 9. The liquid crystal display device according to claim 7, wherein a third frame to an Nth frame are also displayed after the second frame, wherein N is a natural number greater than 1; the adjustment circuit is when After the driving mode is switched from the static mode in the first frame to the dynamic mode in the second frame, gradually reduce the number of pixels driven in the static mode in the third frame to the Nth frame. 10. The liquid crystal display device according to claim 7, wherein the grayscale conversion circuit comprises: A static grayscale table, used to query the grayscale data corresponding to the pixel in the second frame; A dynamic high grayscale table, used to query the grayscale data corresponding to the pixel in the second frame; A dynamic low grayscale table, used to query the grayscale data corresponding to the pixel in the second frame; and A multiplexer, according to a driving mode table, selects the gray-scale data queried by one of the static gray-scale table, the dynamic high gray-scale table and the dynamic low gray-scale table as an output, wherein the driving The mode table is recorded with the information of driving the pixel in the static mode and the dynamic mode in the second frame. 11. The liquid crystal display device according to claim 7, wherein the grayscale conversion circuit comprises: A static high grayscale table, used to query the grayscale data corresponding to the pixel in the second frame; A static low grayscale table, used to query the grayscale data corresponding to the pixel in the second frame; A dynamic high grayscale table, used to query the grayscale data corresponding to the pixel in the second frame; a dynamic low grayscale table, used to query the grayscale data corresponding to the pixel in the second frame; and a multiplexer for selecting a gray value queried from one of the static high gray scale table, the static low gray scale table, the dynamic high gray scale table and the dynamic low gray scale table according to a driving mode table Level data is used as an output, wherein the driving mode table records the information of driving the pixel in the static mode and the dynamic mode in the second frame. 12. The liquid crystal display device according to claim 7, wherein the adjustment circuit comprises: a counter for counting the number of frames following the first frame to output a count value; a plurality of driving mode tables, used to record the information that the pixels are driven in the static mode and in the dynamic mode, and the proportions of the pixels driven in the static mode and in the dynamic mode in each of the driving mode tables are different; as well as A multiplexer selects one of the driving mode tables according to the count value to output a pixel driving mode switching signal.

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