Method for frame rate control of liquid crystal display and corresponding device

Abstract

A frame rate control method and corresponding device for a liquid crystal display are disclosed. The method comprises: extracting gray scale data of a plurality of initial regions from gray scale data of a current frame, and determining a plurality of groups of compensation patterns according to low bit data of the gray scale data of the plurality of initial regions; selecting a plurality of initial compensation patterns from the plurality of groups of compensation patterns respectively, the plurality of initial compensation patterns corresponding to the plurality of initial regions respectively; starting from the plurality of initial compensation patterns, determining new compensation patterns in a manner of increasing or decreasing step length according to serial number in a group of compensation patterns to which the new compensation patterns belong respectively, and starting from the plurality of initial regions, positioning new regions by increasing or decreasing corresponding regions in a row direction and a column direction of the liquid crystal display respectively to locate new regions, and corresponding the new compensation patterns to the new regions of the liquid crystal display until covering the display screen; and adding compensation values to gray scale data of corresponding regions of the current frame according to each compensation pattern. The method solves display problems caused by obvious periodicity of the compensation patterns.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a frame rate control method and corresponding device for a liquid crystal display screen. Background Technology

[0002] Frame rate control (FRC) is a technology widely used in liquid crystal display devices. It reduces the cost of display devices by using less data to represent the same gray level.

[0003] Figure 1 An example of simulating grayscale levels spatially using frame rate control techniques is given. Figure 1 In (a), the compensation pattern corresponding to the pixel matrix composed of pixels D1 to D4 can be represented as follows: According to this compensation pattern, by simply adjusting pixel D1 from grayscale 0 to grayscale 1, the viewer will perceive a display effect of one-quarter of the grayscale level. Figure 1 In (b), the compensation pattern corresponding to the pixel matrix composed of pixels D1 to D4 can be represented as follows: According to this compensation pattern, if only pixels D2 and D3 are adjusted from grayscale 0 to grayscale 1, the viewer will perceive a display effect with two-quarters grayscale levels. Figure 1 In (c), the compensation pattern corresponding to the pixel matrix composed of pixels D1 to D4 can be represented as follows: According to this compensation pattern, by adjusting only pixels D2 to D4 from grayscale 0 to grayscale 1, the viewer will perceive a display effect with three-quarters grayscale levels. Based on this principle, frame rate control technology can assign different compensation values ​​to different pixels in the current frame without increasing hardware resolution, simulating richer grayscale levels and thus improving the precision of the display effect.

[0004] Figure 2 An example of simulating grayscale levels over time using frame rate control (FRC) is given. Figure 2 (a) A compensation pattern corresponding to four frames is According to this compensation pattern, the gray level of the fourth frame is 1, and the gray level of the other three frames is 0. This combination simulates a quarter gray level (25%) display effect. Figure 2 In (b), the four frames correspond to a compensation pattern. According to this compensation pattern, in the four frames, the gray level of the third and fourth frames is 1, and the gray level of the remaining two frames is 0. This combination simulates a display effect of half gray level (50%). Figure 2 In (c), the four frames correspond to a compensation pattern. The gray level of the second to fourth frames is 1, and the gray level of the first frame is 0. This combination simulates three-quarters of the gray level (75%).

[0005] However, if the operation of simulating grayscale levels according to time exhibits obvious periodicity (e.g., cycling the same set of compensation patterns between frames), visual artifacts such as vertical lines, horizontal lines, and diagonal lines will appear. If the operation of simulating grayscale levels according to space exhibits obvious periodicity (e.g., cycling the same set of compensation patterns between different areas within the same frame), flickering or motion artifacts will occur. These problems, individually or in combination, will all lead to a deterioration in display quality. Summary of the Invention

[0006] To avoid obvious periodicity in the operation of simulating grayscale levels according to time or space, this invention proposes a frame rate control method and corresponding device for a liquid crystal display screen, which alleviates this problem to a certain extent.

[0007] In a first aspect, embodiments of this disclosure provide a frame rate control method for a liquid crystal display screen, comprising:

[0008] Extract grayscale data of multiple initial regions of the liquid crystal display screen from the grayscale data of the current frame, and determine multiple sets of compensation patterns based on the low-order data of the grayscale data of the multiple initial regions. Each compensation pattern in each set of compensation patterns is sorted by serial number.

[0009] Multiple initial compensation patterns are selected from the corresponding multiple sets of compensation patterns, and the multiple initial compensation patterns correspond to the multiple initial regions respectively;

[0010] Starting from each initial compensation pattern, a new compensation pattern is determined in the group of compensation patterns by incrementing or decrementing the step size according to the sequence number. At the same time, starting from each initial area, a new area is located by incrementing the corresponding number of areas in the row and column directions of the liquid crystal display screen. The new compensation pattern corresponds to the new area until it covers the liquid crystal display screen.

[0011] According to the compensation pattern of the corresponding area, a compensation value is added to the grayscale data of the corresponding area of ​​the current frame, so as to apply a data voltage to the liquid crystal display screen according to the grayscale data after the compensation value is added.

[0012] In some embodiments, the number of the plurality of initial regions and the plurality of initial compensation patterns are both 4. Each initial region is incremented by two regions each time to locate the new region, and the new compensation pattern is determined by incrementing or decrementing the sequence number by 2.

[0013] In some embodiments, the method of setting the step size by incrementing or decrementing the serial number includes: incrementing the serial number in both the row and column directions, incrementing the serial number in the row direction and decrementing it in the column direction, decrementing it in the row direction and incrementing it in the column direction, and decrementing it in both the row and column directions.

[0014] In some embodiments, the method further includes: the current frame is sequentially obtained from frame 1 to frame N in a frame sequence, and the frame rate control method further includes: changing the initial region and / or the initial compensation pattern in the first to Nth frames.

[0015] In some embodiments, the initial compensation pattern of the initial region in the first frame to the Nth frame is numbered in a set of compensation patterns according to increments or decrements of s, where s is taken from P prime numbers less than N.

[0016] In some embodiments, if the new sequence number obtained by incrementing and / or decrementing the set step size is greater than the maximum sequence number in the corresponding set of compensation patterns or is a negative number, then the valid sequence number is obtained by taking the remainder of the new sequence number with respect to the number of compensation patterns in the corresponding set of compensation patterns. If the result is negative, then the absolute value is taken.

[0017] In some embodiments, changing at least one of the plurality of initial regions in the first to Nth frames includes: moving the initial region in the first to Nth frames to the next region by a set step size.

[0018] In some embodiments, the number of groups of the multiple sets of compensation patterns and the number of compensation patterns in each group are determined based on the resolution of the liquid crystal display and the grayscale data of the current frame.

[0019] Secondly, embodiments of this disclosure provide a frame rate control method for a liquid crystal display screen, wherein the frame rate control method cyclically performs the following initial compensation pattern selection operation:

[0020] Obtain frames 1 to N sequentially from the frame sequence;

[0021] Multiple sets of compensation patterns are determined based on the low-bit data of grayscale data of multiple initial regions from frame 1 to frame N, and the compensation patterns in each set of compensation patterns are arranged in order.

[0022] Multiple initial compensation patterns are selected from multiple sets of compensation patterns in each frame, and the multiple initial compensation patterns correspond to the multiple initial regions respectively.

[0023] Among them, the compensation patterns of the initial regions at the same position in frames 1 to N are numbered in the compensation pattern group according to s, which is either increasing or decreasing, and s is taken from the set of prime numbers less than N.

[0024] Thirdly, embodiments of this disclosure provide a frame rate control device in a liquid crystal display apparatus, comprising:

[0025] The data parsing module is used to parse the grayscale data of the current frame and divide it into low-order data and high-order data;

[0026] A pixel counter is used to generate column position information;

[0027] A row counter is used to generate row position information;

[0028] A pattern generator is configured to determine a set of compensation patterns from multiple cached compensation patterns based on the low-order data of each initial region of the current frame, and then select the corresponding initial compensation pattern from the set of compensation patterns; and starting from each initial compensation pattern, determine a new compensation pattern in the set of compensation patterns by incrementing or decrementing the sequence number by a set of steps; and starting from each initial region, locate a new region by incrementing the corresponding number of regions in the row direction and column direction of the liquid crystal display screen based on the row position information and the column position information, with the new compensation pattern corresponding to the new region, until the liquid crystal display screen is covered;

[0029] An adder is used to determine whether to add a compensation value to each pixel of the high-bit data according to the compensation pattern corresponding to each region, and to process accordingly.

[0030] In some embodiments, the pattern generator further includes a frame counter for obtaining a frame count, wherein the current frame is the first to the Nth frame obtained sequentially from the frame sequence. The pattern generator further includes changing the initial region and / or the initial compensation pattern in the first to the Nth frames according to the frame count.

[0031] In some embodiments, the initial compensation pattern of the initial region in the first frame to the Nth frame is numbered in the compensation pattern group according to s, which is either increasing or decreasing, and s is taken from P prime numbers less than N.

[0032] In some embodiments, the pattern generator determines four initial regions and four initial compensation patterns, and the pattern generator obtains the new compensation patterns for the four initial compensation patterns by methods such as increasing the sequence number in both the row and column directions, increasing the sequence number in the row direction and decreasing the sequence number in the column direction, decreasing the sequence number in the row direction and increasing the sequence number in the column direction, and decreasing the sequence number in the row direction and decreasing the sequence number in the column direction.

[0033] Fourthly, embodiments of this disclosure provide a liquid crystal display device, including the frame rate control device described above.

[0034] The frame rate control method and corresponding apparatus for a liquid crystal display screen provided in this disclosure propose a spatial arrangement of compensation patterns to effectively prevent line artifacts caused by the obvious periodicity of the compensation patterns in space. At the same time, a temporal arrangement of compensation patterns is also proposed to effectively prevent polar voltage coupling and periodic dynamic artifacts and flicker caused by the repeated use of preset compensation patterns.

[0035] It should be noted that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0036] The above and other objects, features, and advantages of this application will become clearer from the following description of embodiments with reference to the accompanying drawings, in which: Figure 1 An example of simulating grayscale levels spatially using frame rate control techniques is given; Figure 2 An example of simulating grayscale levels in time using frame rate control (FRC) is given; Figure 3 The method of identifying the compensation pattern in the embodiments of this disclosure is given; Figure 4 A flowchart of the frame rate control method according to an embodiment of this disclosure is provided; Figure 5 It is used for explanation Figure 4 Examples of the embodiments shown; Figure 6 A flowchart of the frame rate control method according to an embodiment of this disclosure is provided; Figure 7 It is used for explanation Figure 6 Examples of the embodiments shown; Figure 8 This is a schematic diagram of the frame rate control device according to an embodiment of the present disclosure. Detailed Implementation

[0037] The present application will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale. Furthermore, some well-known parts may not be shown.

[0038] This disclosure first defines a set of compensation patterns, and then uses... This is represented as follows: Where t represents the sequence number of the current compensation pattern in the group of compensation patterns, and x represents the size of the grayscale data to be compensated (usually the value of the low-order bits of the grayscale data). Here, the high and low bits of the grayscale data refer to: for example, for a 2*2 pixel area, i.e., 4 bits of grayscale data, if the lower 2 bits are called low-order data and the remaining higher bits are called high-order data, then the low-order data has three binary forms: 01, 10, and 11. The compensation pattern corresponding to 01 is... = , , , If the low-order data of the received grayscale data is 0 or 1, a pattern is selected from the corresponding set of compensation patterns, and compensation values ​​are added to the high-order data of the corresponding pixel according to the pattern.

[0039] refer to Figure 3 As shown, k represents the number of pixels (i.e., width) of a row of the compensation pattern, g represents the number of pixels (i.e., length) of a column of the compensation pattern, Fc represents the number of frames, indicating that when performing temporal grayscale level simulation operations, Fc frames are grouped together, Hi represents the horizontal sequence number of the compensation pattern on the LCD screen, Vj represents the vertical sequence number of the compensation pattern on the LCD screen, Hi and Vj define the position of the compensation pattern on the LCD screen, and t represents the sequence number of the compensation pattern used in its group of compensation patterns.

[0040] Figure 4 A flowchart of a frame rate control method according to an embodiment of the present disclosure is provided. The frame rate control method includes the following steps.

[0041] In step S10, grayscale data of multiple initial regions of the liquid crystal display screen are extracted from the grayscale data of the current frame, and multiple sets of compensation patterns are determined based on the low-order data of the grayscale data of the multiple initial regions.

[0042] In step S20, multiple initial compensation patterns are selected from the corresponding multiple sets of compensation patterns, and the multiple initial compensation patterns are respectively mapped to multiple initial areas of the liquid crystal display screen.

[0043] In step S30, starting from multiple initial compensation patterns, new compensation patterns are determined in their respective groups of compensation patterns by incrementing or decrementing the sequence number by a set step size. At the same time, starting from multiple initial regions, new regions are located by incrementing the corresponding number of regions in the row and column directions of the liquid crystal display screen, and the new compensation pattern is mapped to the new region. If the incrementing and / or decrementing of the sequence number results in a negative sequence number or exceeds the maximum value, the process jumps to other valid sequence numbers.

[0044] In step S40, compensation values ​​are added to the grayscale data of the corresponding area of ​​the current frame according to each compensation pattern of the current frame, so as to apply data voltage to the display of the liquid crystal display device according to the compensated grayscale data.

[0045] This embodiment mainly determines the compensation pattern for each area of ​​the liquid crystal display screen, and uses the compensation pattern to adjust the grayscale data spatially to optimize the display effect, specifically:

[0046] First, select multiple initial regions from the LCD screen. Extract grayscale data of each initial region from the grayscale data of the current frame. Then, based on the low-order data of the grayscale data of each initial region, select multiple sets of compensation patterns from a set of predefined compensation patterns that match the initial regions. Each predefined set of compensation patterns corresponds to a possible value of the low-order data of the grayscale data of the initial region. Each set of compensation patterns contains multiple compensation patterns, and the compensation patterns in each set of compensation patterns are sorted by serial number.

[0047] Then, from each group of compensation patterns, an initial compensation pattern is selected, and these initial compensation patterns are respectively mapped to each initial area of ​​the LCD screen, that is, a specific compensation pattern is assigned to each initial area as the starting point of the compensation operation.

[0048] Next, starting from the initial compensation pattern, a new compensation pattern is determined according to the rule of incrementing or decrementing the sequence number. At the same time, on the LCD screen, starting from the initial area, the corresponding area is skipped along the row and column directions with the set step size to locate the new area. The new compensation pattern is then mapped onto the new area. The above process is repeated until the entire LCD screen is covered by the compensation pattern. If the incrementing or decrementing of the sequence number results in a negative sequence number or exceeds the maximum value, it is processed into another valid sequence number.

[0049] Finally, based on the compensation pattern of each region determined in step S30, compensation values ​​are added to the grayscale data of the corresponding region of the current frame. The grayscale data after the compensation values ​​are added is converted into data voltage and applied to the liquid crystal display screen.

[0050] The following is based on Figure 5 This implementation will be explained in more detail with an example. Figure 5 As shown, the yellow lines define the area of ​​the LCD screen, specifically the four consecutive areas in the upper left corner of the LCD screen: , , and (corresponding to) The four initial regions are used as the basis for determining the grayscale data of the current frame in these four initial regions. The low-order bits of the grayscale data in these four initial regions are represented by x1, x2, x3, and x4. Four sets of compensation patterns are determined based on x1, x2, x3, and x4 respectively. , , Then, arbitrarily select the serial numbers t1, t2, t3, and t4, and the compensation scheme is... , , and This is the initial compensation pattern for the four initial regions.

[0051] Then, with Starting with t1, locate the group to which it belongs by incrementing s (s=2) in the row direction. In , Position the compensation pattern group by incrementing t1 by s (s=2) in the column direction. In , , and with As the initial region, locate the region by incrementing by s (s=2) in both row and column directions. , , , ,but , , , For the region , , , The compensation pattern.

[0052] Then with The initial example is a decrease of 's' in the row direction but an increase of 's' in the column direction, so that... The initial example is an increment of 's' in the row direction but a decrease of 's' in the column direction, so that... The initial example decreases by 's' in both the row and column directions, which will not be described in detail here. When the incremented or decremented sequence number exceeds the maximum sequence number of its corresponding compensation pattern or is less than 0, it is processed into another valid sequence number (for example, the sequence number value is divided by the maximum sequence number and the remainder is taken; if the result is negative, the absolute value is taken). This pattern covers all pixels of the entire LCD screen. Figure 5 The yellow box in the image represents the resolution of the LCD screen; the area outside the yellow box is discarded.

[0053] In some embodiments, Figure 4 The current frame mentioned in the embodiment is the first to the Nth frame obtained sequentially from the frame sequence. From the first to the Nth frame, the initial region and / or the initial compensation pattern of the current frame are changed sequentially. For example, the current region skips several regions each time in the row or column direction.

[0054] In some embodiments, the number of multiple sets of compensation patterns and the number of compensation patterns in each set are determined based on the resolution of the liquid crystal display and the grayscale data of the current frame. More specifically, the grayscale data of each region and the size of the region satisfy the following formula: the number of (high-order data + 1) grayscale data of the region = g*k / x, where x is the value of the low-order data, k represents the number of pixels (i.e., width) occupied by a row of compensation patterns, and g represents the number of pixels (i.e., length) occupied by a column of compensation patterns.

[0055] Figure 6 A flowchart of a frame rate control method according to an embodiment of this disclosure is provided. This frame rate control method implements temporal grayscale level simulation and includes the following steps.

[0056] In step S610, a prime number is selected from P prime numbers less than N as the value of s.

[0057] In step S620, the first frame to the Nth frame are sequentially obtained from the frame sequence.

[0058] In step S630, multiple sets of compensation patterns are determined from a predefined set of compensation patterns based on the low-bit data of the grayscale data of multiple initial regions from the first frame to the Nth frame.

[0059] In step S640, for multiple initial regions from the first frame to the Nth frame, multiple initial compensation patterns are selected from the corresponding multiple sets of compensation patterns, wherein the sequence number of the multiple initial compensation patterns in their respective groups increases in s.

[0060] According to this embodiment, frames 1 to N are first selected from the frame sequence. Then, based on the low-order data of grayscale data of multiple preset initial regions in frames 1 to N, multiple sets of compensation patterns matching the multiple initial regions are selected from multiple predefined sets of compensation patterns. Each predefined set of compensation patterns corresponds to a possible value of the low-order data of the grayscale data of the initial region. Each set of compensation patterns contains multiple compensation patterns, and the compensation patterns in each set are sorted by sequence number. Then, an initial compensation pattern is selected from each set of compensation patterns, and these initial compensation patterns are respectively mapped to the initial regions of the liquid crystal display screen, that is, a specific compensation pattern is assigned to each initial region as the starting point of the compensation operation. The sequence number of the compensation pattern of the initial region at the same position in frames 1 to N in the set of compensation patterns is increasing or decreasing according to s, where s is taken from the set of prime numbers less than N. For example, when N equals 8, the prime number combination is {1,3,5,7}, and the sequence numbers of the compensation patterns in frames 1 to 8 change as shown in Table 1.

[0061] Table 1

[0062] More intuitive examples are as follows Figure 7 As shown, in small loop 1, the sequence number of the initial compensation pattern from frame 1 to frame N is continuously increased by ta. In small loop 2, the sequence number of the initial compensation pattern from frame 1 to frame N is continuously increased by tb. Until in small loop 2, the sequence number of the initial compensation pattern from frame 1 to frame N is continuously increased by tm. Small loop 1 to m form a large loop. In this way, each large loop will go through m*N frames.

[0063] It should be pointed out that, Figure 4 and Figure 6 The embodiments can be implemented in the same embodiment to achieve frame rate control in both time and space.

[0064] This disclosure also provides a frame rate control device for a liquid crystal display device, such as... Figure 8 As shown, it includes a data parsing module 801, an adder 802, a pattern generator 803, a frame counter 805, a pixel counter 806, and a line counter 807.

[0065] As shown in the figure, frame counter 805, pixel counter 806, and row counter 807 utilize externally input timing signals (such as horizontal synchronization signal hsync, vertical synchronization signal vsync, data enable signal de, and clock signal clk) to generate frame counts, row position information, and column position information (i.e., pixel position information). Frame counter 805 can use one of the vertical synchronization signal Vsync, the horizontal synchronization signal Hsync, and the data enable signal DE to count frame cycles. For example, the frame count value is incremented by one every cycle of the vertical synchronization signal Vsync, thereby accumulating the frame count value each time a frame cycle passes, thus counting frame cycles.

[0066] The data parsing module 801 is used to parse the grayscale data of the current frame input, divide it into two parts: low-order data and high-order data, and then provide the low-order data to the pattern selector 803 and the high-order data to the adder 802.

[0067] The pattern generator 803 is used to determine the compensation pattern for each area on the liquid crystal display screen. This includes: determining a set of compensation patterns from multiple cached sets of compensation patterns based on the low-order data of each area; then selecting the corresponding compensation pattern number from this set of compensation patterns based on row and column position information, and obtaining the corresponding compensation pattern accordingly. Specifically, in each row and column of the liquid crystal display screen, starting from the initial compensation pattern number of the initial area, the sequence number of the compensation pattern for subsequent areas is obtained by incrementing or decrementing by a set step size in both the row and column directions.

[0068] Adder 802 is used to determine whether to add compensation values ​​to each pixel of the input high-order data according to the compensation pattern corresponding to each region, and processes the data accordingly. Adder 802 outputs high-order data with or without compensation values ​​added according to the compensation pattern, and applies a data voltage to the display of the liquid crystal display device according to the data to complete the display.

[0069] Accordingly, this disclosure also provides a liquid crystal display device, which includes a liquid crystal display and the frame rate control device described above.

[0070] Furthermore, embodiments of this disclosure also provide a computer-readable storage medium for storing one or more computer instructions, which, when executed, implement the frame rate control method mentioned above. Additionally, embodiments of this disclosure also provide a computing device, including a memory and a processor, wherein the memory stores one or more computer instructions, which, when executed by the processor, implement the frame rate control method mentioned above.

[0071] Although the embodiments of this application are disclosed above with reference to preferred embodiments, they are not intended to limit the claims. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of this application. Therefore, the scope of protection of this application shall be determined by the scope defined by the claims of this application.

[0072] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A frame rate control method for a liquid crystal display screen, comprising: Obtain frames 1 to N sequentially from the frame sequence; For the current frame in the first to Nth frames, grayscale data of multiple initial areas of the liquid crystal display screen are extracted from the grayscale data of the current frame, and multiple sets of compensation patterns are determined based on the low-order data of the grayscale data of the multiple initial areas, wherein each compensation pattern in each set of compensation patterns is sorted by sequence number. For the current frame, multiple initial compensation patterns are selected from the corresponding multiple sets of compensation patterns, and the multiple initial compensation patterns correspond to the multiple initial regions respectively; For the current frame, starting from each initial compensation pattern, a new compensation pattern is determined in the group of compensation patterns by incrementing or decrementing the set step size according to the sequence number. At the same time, starting from each initial region, a new region is located by incrementing the corresponding number of regions in the row and column directions of the liquid crystal display screen. The new compensation pattern corresponds to the new region until it covers the liquid crystal display screen. For the current frame, compensation values ​​are added to the grayscale data of the corresponding region of the current frame according to the compensation pattern of the corresponding region, so as to apply data voltage to the liquid crystal display screen according to the grayscale data after adding compensation values; In this process, the initial regions in frames 1 to N move to the next region by a set step size. The initial compensation pattern of the initial regions in frames 1 to N is numbered in a set of compensation patterns according to increments or decrements of s, where s is taken from P prime numbers less than N.

2. The frame rate control method according to claim 1, wherein, The number of the plurality of initial regions and the plurality of initial compensation patterns are both 4.

3. The frame rate control method according to claim 1 or 2, wherein, The method of setting the step size by incrementing or decrementing the serial number includes: incrementing the serial number in both the row and column directions, incrementing the serial number in the row direction and decrementing it in the column direction, decrementing it in the row direction and incrementing it in the column direction, and decrementing it in both the row and column directions.

4. The frame rate control method according to claim 1, wherein, If the new sequence number obtained by setting the step size by incrementing or decrementing the sequence number is greater than the maximum sequence number in the corresponding compensation pattern group or is negative, then the valid sequence number is obtained by taking the remainder of the new sequence number with respect to the number of compensation patterns in the corresponding compensation pattern group. If the result is negative, then the absolute value is taken.

5. The frame rate control method according to claim 1, wherein, The number of groups of compensation patterns and the number of compensation patterns in each group are determined based on the resolution of the liquid crystal display screen and the grayscale data of the current frame.

6. A frame rate control device in a liquid crystal display device, comprising: The data parsing module is used to parse the grayscale data of the current frame and divide it into low-order data and high-order data; A pixel counter is used to generate column position information; A row counter is used to generate row position information; The pattern generator is used to sequentially obtain frames 1 to N from the frame sequence as the current frame, determine a set of compensation patterns from multiple sets of cached compensation patterns based on the low-order data of the initial region of the current frame, and then select the corresponding initial compensation pattern from the set of compensation patterns. Starting from each initial compensation pattern, a new compensation pattern is determined in the corresponding set of compensation patterns by incrementing or decrementing the sequence number by a set step size. Simultaneously, starting from each initial region, based on the row position information and the column position information, a new region is located by incrementing the corresponding number of regions in the row and column directions of the liquid crystal display screen. The new compensation pattern corresponds to the new region until the liquid crystal display screen is covered. The initial regions in the first frame to the Nth frame move to the next region by a set step size. The sequence number of the initial compensation pattern of the initial region in the first frame to the Nth frame in the corresponding compensation pattern group is incremented or decremented by s, where s is taken from P prime numbers less than N. An adder is used to determine whether to add a compensation value to each pixel of the high-bit data according to the compensation pattern corresponding to each region, and to process accordingly; A frame counter is used to obtain the frame count.

7. The frame rate control device according to claim 6, wherein, The pattern generator determines four initial regions and four initial compensation patterns. The pattern generator obtains the new compensation patterns for the four initial compensation patterns by using the following methods: increasing the sequence number in both row and column directions, increasing the sequence number in both row and column directions, decreasing the sequence number in both row and column directions, and decreasing the sequence number in both row and column directions.

8. A liquid crystal display device, comprising: The frame rate control device as described in any one of claims 6 to 7.

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