Display gray scale jitter method, display driving device and display device

Abstract

The invention discloses a display gray scale jitter method, a display driving device and a display device. The method comprises the following steps: determining the size of a first minimum balance unit and the number of target carry points according to the number of jitter gray scales corresponding to frame frequency control; in response to the fact that the number of the target carry points is smaller than 4, obtaining a first minimum period unit with the number of the carry points being 4; according to the four frames of first minimum balance units, second minimum periodic units are constructed for the number of target carry points, the second minimum periodic units comprise four frames of second minimum balance units, the second minimum balance units are different from one another, and the total number of carry points of the adjacent second minimum balance units is a multiple of 4; the carry points are not overlapped after the four frames of second minimum balance units are overlapped, and the polarity of each second minimum balance unit is balanced; and performing gray scale jitter according to the second minimum period unit. By means of the mode, the problems of cross grains, transverse grains, vertical grains, noisy points, splash screens and the like in the shaking process can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display panel, in particular to a display gray scale dithering method, a display driving device and a display device. BACKGROUND

[0002] A big advantage of liquid crystal television compared with traditional CRT (Cathode Ray Tube) display and plasma display is power saving. Liquid crystal has only half of the power consumption of CRT of the same size, and is much lower than plasma. Liquid crystal also performs better in environmental protection compared with traditional CRT. This is because there is no high-voltage component in the liquid crystal display, so it is not prone to the situation of exceeding the standard of radioactive rays caused by high voltage. The display area of the liquid crystal display itself has no radiation at all. Only a small amount of electromagnetic waves come from the driving circuit. As long as the shell is strictly sealed, EMI (Electromagnetic Interference) can be reduced. Therefore, the radiation index is generally lower than that of CRT. The liquid crystal display has a large visible area. The liquid crystal display controls the state of liquid crystal molecules through electrodes on the display screen to achieve the purpose of display. Even if the screen is enlarged, its volume will not increase in proportion (only the size is increased, not the thickness, so many products provide a wall hanging function to save space for users). Moreover, the weight of the liquid crystal display is much lighter than that of the traditional display of the same display area. The weight of the liquid crystal television is about 1 / 3 of that of the traditional television. Therefore, the liquid crystal display is also called a cold display or an environmentally friendly display. At present, LCD (Liquid Crystal Display) displays are developing towards higher resolution, higher display quality and larger size. When the TFT-LCD is driven, the driving mode is Line-by-Line (Line-by-Line scanning). As shown in Figure 1 , when the Gn signal is high (25V), the TFT of the current line is opened (On), and the data in the column direction can be written into the pixel, such as V1+, V2-, and V3+ written into the corresponding pixel. When the Gn-1 signal and the Gn+1 signal are low (-5V), the TFT of the current line is closed (Off).

[0003] The related technology is 256 gray scales, and 8 bits of data transmission are required, which is not conducive to transmission. In the new 6bit FRC data transmission, because the dithering scheme is not good, it causes the occurrence of problems such as diagonal lines, horizontal lines, vertical lines, noise, and screen flicker. SUMMARY

[0004] The present application provides a display gray scale dithering method, a display driving device and a display device, which can reduce the occurrence of problems such as diagonal lines, horizontal lines, vertical lines, noise, and screen flicker in the dithering process.

[0005] In a first aspect, the application provides a gray scale dithering method, comprising: determining the size of a first minimum balance unit and the number of target carry-in points according to the number of dithering gray scales corresponding to the frame frequency control; in response to the number of target carry-in points being less than 4, obtaining a first minimum period unit with 4 carry-in points; the first minimum period unit comprises 4 frames of first minimum balance units, each first minimum balance unit is different from each other, and each first minimum balance unit has 4 carry-in points, the carry-in points of the 4 first minimum balance units are not overlapped after superposition, and each first minimum balance unit is polarity balanced; constructing a second minimum period unit for the number of target carry-in points according to the 4 frames of first minimum balance units, wherein the second minimum period unit comprises 4 frames of second minimum balance units, each second minimum balance unit is different from each other, and the total number of carry-in points of adjacent second minimum balance units is a multiple of 4, the carry-in points of the 4 frames of second minimum balance units are not overlapped after superposition, and each second minimum balance unit is polarity balanced; and dithering gray scales according to the second minimum period unit.

[0006] The 4 frames of first minimum balance units comprise: a first frame of first minimum balance units, a second frame of first minimum balance units, a third frame of first minimum balance units, and a fourth frame of first minimum balance units; and constructing a second minimum period unit for the number of target carry-in points according to the 4 frames of first minimum balance units, comprising: in response to the number of target carry-in points being 1, determining the size of a second minimum balance unit; wherein the size of the second minimum balance unit is 4 times the size of the first minimum balance unit; and constructing a second minimum period unit for the number of target carry-in points according to the first frame of first minimum balance units, the second frame of first minimum balance units, the third frame of first minimum balance units, and the fourth frame of first minimum balance units.

[0007] The 4 frames of second minimum balance units include a first frame of second minimum balance unit, a second frame of second minimum balance unit, a third frame of second minimum balance unit and a fourth frame of second minimum balance unit; each second minimum balance unit is divided into a first area, a second area, a third area and a fourth area; the second minimum period unit for the target carry point number is constructed according to the first frame of first minimum balance unit, the second frame of first minimum balance unit, the third frame of first minimum balance unit and the fourth frame of first minimum balance unit, including: the first frame of first minimum balance unit, the second frame of first minimum balance unit, the third frame of first minimum balance unit and the fourth frame of first minimum balance unit are respectively divided into first minimum balance units with two carry points in a column equal division manner; or, the first frame of first minimum balance unit, the second frame of first minimum balance unit, the third frame of first minimum balance unit and the fourth frame of first minimum balance unit are respectively divided into first minimum balance units with two carry points in a row equal division manner; the eight first minimum balance units with two carry points are distributed to the first frame of second minimum balance unit, the second frame of second minimum balance unit, the third frame of second minimum balance unit and the fourth frame of second minimum balance unit, to obtain the first frame of second minimum balance unit, the second frame of second minimum balance unit, the third frame of second minimum balance unit and the fourth frame of second minimum balance unit; wherein, only one area in the same area of adjacent frame second minimum balance units has a carry point, and there are four carry points in each frame of second minimum balance unit, the number of carry points in the diagonal areas of each frame of second minimum balance unit is the same, and the directions of the carry points in the two areas with carry points in each frame of second minimum balance unit are different.

[0008] The 4 frames of first minimum balance units include: a first frame of first minimum balance unit, a second frame of first minimum balance unit, a third frame of first minimum balance unit and a fourth frame of first minimum balance unit; the second minimum period unit for the target carry point number is constructed according to the 4 frames of first minimum balance units, including: in response to the target carry point number being 2, the size of the second minimum balance unit is determined; wherein, the size of the second minimum balance unit is the size of the first minimum balance unit; the second minimum period unit for the target carry point number is constructed according to the first frame of first minimum balance unit, the second frame of first minimum balance unit, the third frame of first minimum balance unit and the fourth frame of first minimum balance unit.

[0009] The 4 frames of the second minimum balance units comprise a first frame of the second minimum balance unit, a second frame of the second minimum balance unit, a third frame of the second minimum balance unit and a fourth frame of the second minimum balance unit; the second minimum period unit is constructed for the target carry point number according to the first frame of the first minimum balance unit, the second frame of the first minimum balance unit, the third frame of the first minimum balance unit and the fourth frame of the first minimum balance unit, comprising: obtaining two carry points from the first frame of the first minimum balance unit to obtain the first frame of the second minimum balance unit; obtaining two carry points from the second frame of the first minimum balance unit to obtain the second frame of the second minimum balance unit; obtaining two carry points from the third frame of the first minimum balance unit to obtain the third frame of the second minimum balance unit; obtaining two carry points from the fourth frame of the first minimum balance unit to obtain the fourth frame of the second minimum balance unit; wherein the carry point distribution image after superposition of the first frame of the second minimum balance unit, the second frame of the second minimum balance unit, the third frame of the second minimum balance unit and the fourth frame of the second minimum balance unit is balanced, and the carry points in the carry point distribution image are discontinuous.

[0010] The 4 frames of the first minimum balance units comprise a first frame of the first minimum balance unit, a second frame of the first minimum balance unit, a third frame of the first minimum balance unit and a fourth frame of the first minimum balance unit; the second minimum period unit is constructed for the target carry point number according to the 4 frames of the first minimum balance units, comprising: in response to the target carry point number being 3, determining the size of the second minimum balance unit; wherein the size of the second minimum balance unit is 4 times the size of the first minimum balance unit; the second minimum period unit is constructed for the target carry point number according to the first frame of the first minimum balance unit, the second frame of the first minimum balance unit, the third frame of the first minimum balance unit and the fourth frame of the first minimum balance unit.

[0011] The 4-frame second minimum balance unit includes a first-frame second minimum balance unit, a second-frame second minimum balance unit, a third-frame second minimum balance unit, and a fourth-frame second minimum balance unit; each second minimum balance unit is divided into a first region, a second region, a third region, and a fourth region; a second minimum period unit is constructed for the target carry point number according to the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit, and the fourth-frame first minimum balance unit, including: for the first region in the 4-frame second minimum balance unit, determining one first target minimum balance unit, two second target minimum balance units, and one third target minimum balance unit from the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit, and the fourth-frame first minimum balance unit; dividing the first target minimum balance unit into two first minimum balance units each having two carry points in a column equalization manner or a row equalization manner; interval distributing the two first minimum balance units each having two carry points in non-adjacent first regions in the 4-frame second minimum balance unit, and distributing the two second target minimum balance units in different remaining first regions respectively; wherein, a distribution pattern of all the first regions after superposition without carry 0 is the same as that of the third target minimum balance unit; for the second region in the 4-frame second minimum balance unit, determining one fourth target minimum balance unit, two fifth target minimum balance units, and one sixth target minimum balance unit from the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit, and the fourth-frame first minimum balance unit; dividing the fourth target minimum balance unit into two first minimum balance units each having two carry points in a column equalization manner or a row equalization manner; interval distributing the two first minimum balance units each having two carry points in non-adjacent second regions in the 4-frame second minimum balance unit, and distributing the two fifth target minimum balance units in different remaining second regions respectively; wherein, a distribution pattern of all the second regions after superposition without carry 0 is the same as that of the sixth target minimum balance unit; for the third region in the 4-frame second minimum balance unit, determining one seventh target minimum balance unit, two eighth target minimum balance units, and one ninth target minimum balance unit from the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit, and the fourth-frame first minimum balance unit; dividing the seventh target minimum balance unit into two first minimum balance units each having two carry points in a column equalization manner or a row equalization manner; interval distributing the two first minimum balance units each having two carry points in non-adjacent third regions in the 4-frame second minimum balance unit, and distributing the two eighth target minimum balance units in different remaining third regions respectively; wherein, a distribution pattern of all the third regions after superposition without carry 0 is the same as that of the ninth target minimum balance unit.For the fourth region in the fourth frame of the second minimum balance unit, one tenth target minimum balance unit, two eleventh target minimum balance units and one twelfth target minimum balance unit are determined from the first frame of the first minimum balance unit, the second frame of the first minimum balance unit, the third frame of the first minimum balance unit and the fourth frame of the first minimum balance unit; the tenth target minimum balance unit is divided into two first minimum balance units each having two carry-in points in a column equal division manner or a row equal division manner; the two first minimum balance units each having two carry-in points are distributed in the non-adjacent fourth regions in the fourth frame of the second minimum balance unit, and the two eleventh target minimum balance units are distributed in the remaining different fourth regions; wherein the distribution pattern of all the fourth regions without carry-in 0 after superposition is the same as the pattern of the twelfth target minimum balance unit; wherein the number of carry-in points in the same regions of the adjacent frame second minimum balance units is different, and there are 12 carry-in points in each frame of the second minimum balance unit, the number of carry-in points in the diagonal regions in each frame of the second minimum balance unit is the same, and the direction of the carry-in points between the diagonal regions in each frame of the second minimum balance unit is different.

[0012] Wherein the number of carry-in points in one region in the same region of the adjacent frame second minimum balance units is 2, and the number of carry-in points in the other region is 4.

[0013] In a second aspect, the present application provides a display driving device, comprising a processing chip and a memory, the memory storing at least one computer program, and the at least one computer program is loaded and executed by the processing chip to implement the method provided in the first aspect.

[0014] In a third aspect, the present application provides a display device, comprising a display panel and a display driving device provided in the second aspect, and the display driving device is used to drive the display panel to display.

[0015] The beneficial effects of the present application are: different from the prior art, the display gray scale dithering method, display driving device and display device provided by the present application determine the size of the first minimum balance unit and the number of target carry-in points according to the number of dithering gray scales corresponding to the frame frequency control; in response to the number of target carry-in points being less than 4, a first minimum period unit with a carry-in point number of 4 is obtained; the first minimum period unit includes 4 first minimum balance units, each first minimum balance unit is different from each other, and each first minimum balance unit has 4 carry-in points, the carry-in points of the 4 first minimum balance units are not overlapped after superposition, and each first minimum balance unit is polarity balanced; according to the 4 first minimum balance units, a second minimum period unit is constructed for the number of target carry-in points, wherein the second minimum period unit includes 4 second minimum balance units, each second minimum balance unit is different from each other, and the total number of carry-in points of adjacent second minimum balance units is a multiple of 4, the carry-in points of the 4 second minimum balance units are not overlapped after superposition, and each second minimum balance unit is polarity balanced; the gray scale dithering is performed according to the second minimum period unit, which can reduce the occurrence of problems such as diagonal lines, horizontal lines, vertical lines, noise points and screen flicker in the dithering process, and improve the display quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. Among them: Figure 1 is a schematic diagram of the TFT-LCD driving mode provided by the present application; Figure 2 is a schematic diagram of frame frequency control provided by the present application; Figure 3 is a schematic diagram of the minimum balance unit when vertical lines are generated; Figure 4 is a schematic diagram of the minimum balance unit when left-up and right-down diagonal lines are generated; Figure 5 is a schematic diagram of the minimum balance unit when left-down and right-up diagonal lines are generated; Figure 6 is a schematic diagram of the minimum balance unit when noise points are generated; Figure 7 is a schematic diagram of the minimum balance unit when screen flicker is generated; Figure 8 is a flowchart of an embodiment of the display gray scale dithering method provided by the present application; Figure 9FIG. 1 is a schematic diagram of a minimum balance unit corresponding to carry-in point 4 and a corresponding polar distribution provided by the present application; Figure 10 FIG. 2 is a schematic diagram of a minimum balance unit after splitting of Figure 9 FIG. 3 is a schematic diagram of a minimum balance unit corresponding to carry-in point 1 and a superimposed carry-in distribution provided by the present application; Figure 11 FIG. 4 is a schematic diagram of a second minimum balance unit and a region division provided by the present application; Figure 12 FIG. 5 is a schematic diagram of a minimum balance unit corresponding to carry-in point 2 and a superimposed carry-in distribution provided by the present application; Figure 13 FIG. 6 is a schematic diagram of another minimum balance unit corresponding to carry-in point 2 and a superimposed carry-in distribution provided by the present application; Figure 14 FIG. 7 is a schematic diagram of a minimum balance unit corresponding to carry-in point 3 and a superimposed carry-in distribution provided by the present application; Figure 15 FIG. 8 is a schematic diagram of a display driving device according to an embodiment of the present application; Figure 16 FIG. 9 is a schematic diagram of a display panel according to an embodiment of the present application; Figure 17 FIG. 10 is a schematic diagram of a display device according to an embodiment of the present application. Figure 18 FIG. 11 is a schematic diagram of a display device according to an embodiment of the present application.

[0017] Labeling instructions: Display driving device: 300; processing chip: 301; memory: 302; display panel: 400; display device: 500. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0020] A big advantage of liquid crystal television compared with traditional CRT (Cathode Ray Tube) display and plasma display is power saving. Liquid crystal has only half of the power consumption of CRT of the same size, and is much lower than plasma. Liquid crystal also performs better in environmental protection compared with traditional CRT. This is because there is no high-voltage component inside the liquid crystal display, so it is not prone to excessive radiation caused by high voltage. The display area of the liquid crystal display itself has no radiation at all, only a small amount of electromagnetic waves from the driving circuit. As long as the shell is strictly sealed, EMI (Electromagnetic Interference) can be reduced, so the radiation index is generally lower than that of CRT. Liquid crystal display has a large visible area. Liquid crystal display controls the state of liquid crystal molecules through electrodes on the display screen to achieve the purpose of display. Even if the screen is enlarged, its volume will not increase in proportion (only the size is increased, not the thickness, so many products provide a wall hanging function to save space for users). Moreover, it is much lighter than traditional displays of the same display area. The weight of liquid crystal television is about 1 / 3 of that of traditional television. Therefore, liquid crystal display is also called cold display or environmentally friendly display. At present, LCD (Liquid Crystal Display) displays are developing towards higher resolution, higher display quality and larger size. When TFT-LCD is driven, the driving mode is Line-by-Line (Line-by-Line scanning), as shown in Figure 1 When the Gn signal is high (25V), the corresponding TFT in the current row is turned on (On), and the data in the column direction can be written into the pixel, such as V1+, V2-, and V3+ written into the corresponding pixel. When the Gn-1 signal and the Gn+1 signal are low (-5V), the corresponding TFT in the current row is turned off (Off).

[0021] The related art is 256 gray scales, and data transmission requires 8 bits, which is not conducive to transmission. In the new 6-bit FRC data transmission, because the dithering scheme is not good, it causes the occurrence of problems such as diagonal lines, horizontal lines, vertical lines, and noise points.

[0022] As Figure 2As shown, there are Temporal Dithering and Spatial Dithering. Taking 6-bit display of 8-bit as an example, temporal dithering involves accumulating time to display the first frame (F1) as a 6-bit A grayscale, the second frame (F2) as a 6-bit A+1 grayscale, the third frame (F3) as a 6-bit A grayscale, and the fourth frame (F4) as a 6-bit A+1 grayscale. This results in a visual effect of displaying a B grayscale that is brighter than A and darker than A+1. The driver only needs to process the A and A+1 data to obtain the extra B grayscale. Because the effect is close to 8-bit, and fewer data processing modules are needed, the driver cost is reduced.

[0023] Spatial jitter, on the other hand, can produce grayscale B within the same frame, even if there are both A and A+1. Its meaning is the same as temporal jitter.

[0024] In actual use, the arrangement of grayscale A sub-pixels and grayscale A+1 sub-pixels in the spatial and temporal domains is very important; improper arrangement can easily lead to abnormalities.

[0025] The jitter anomaly is related to the polarity distribution of sub-pixels. This article only takes the column direction 1+2 line (+--++--) and the row direction point reversal (+-+-+-) as an example. Other reversal methods can be deduced by analogy.

[0026] The causes of vertical lines, horizontal lines, diagonal lines, and noise are as follows: Vertical lines: such as Figure 3 As shown, the image displays a cyclical pattern of 1→2→3→4→1… (called a cycle). Because the first column of each frame's entry point (gray dots) is "+", the second column is also "+", the third column is "-", and the fourth column is also "-", then under the influence of the temporal domain, the first two columns being "+" and the last two columns being "-", this easily leads to uneven brightness between the first two and last two columns, resulting in vertical stripes. In short, it's uneven along the column direction. This unevenness could be due to an imbalance between "+" and "-" indicators, or an imbalance in the number of entry points (A+1). Here, A represents the grayscale of the non-entry point.

[0027] Horizontal stripes work on the same principle as vertical stripes, only the direction changes to rows.

[0028] Twill, its principle is as follows Figure 4 and Figure 5 As shown, although the rows and columns are balanced, because the carry point (A+1) moves in one direction every frame (or most frames within a cycle), diagonal stripes appear in that direction, such as... Figure 4 The image shows a diagonal stripe pattern at the top left and bottom right. Figure 5 The image shows a diagonal pattern at the bottom left and top right.

[0029] noise, the principle as shown in Figure 6 If the last "-" in the first row of the first frame is not successful, this place is darker than other places, and a dark noise appears. In the related art, the generation of the carry-in point basically only takes into account the noise item, and other problems are prone to occur.

[0030] flash screen, the principle as shown in Figure 7 If all the first frame is of one polarity and the number is sufficient (at least not more than 1 / 16 of the total number), and there is a brightness difference within the 6-bit gray scale range of "+" polarity and "-" polarity, a flash screen will be caused.

[0031] In some embodiments, carry-in 0 is to keep a low gray scale, and carry-in 1 is to keep a high gray scale. For example, 6 bits, the total number of gray scales is 64 (including 0~63 gray scales), and then how to display the false 15 gray scales of 10 bits (total 0~1023 gray scales) effect, the real 1 gray scale of 6 bits appears 15 times in a 4*4 grid, and the other one appears once, which is the real 0 gray scale; the real 1 gray scale is the carry-in.

[0032] For the FRC algorithm, the carry-in 4 balance of 4-bit FRC is easy to achieve, the carry-in 2 is difficult, and the carry-in 1 and the carry-in 3 are the most difficult.

[0033] In view of this, the present application proposes any one of the following technical solutions to solve the at least one technical problem.

[0034] Referring to Figure 8 , Figure 8 is a flowchart of an embodiment of a display gray scale dithering method provided by the present application. The method comprises: Step 11: determining the size of the first minimum balance unit and the number of target carry-in points according to the number of dithering gray scales corresponding to the frame frequency control.

[0035] Among them, the first minimum balance unit is in row-column distribution, and the polarity is balanced.

[0036] In some embodiments, the size of the first minimum balance unit is determined according to the number of dithering gray scales. For example, in response to the number of dithering gray scales corresponding to the frame frequency control being N, the size of the first minimum balance unit is 2 raised to the power of N. For example, the number of dithering gray scales corresponding to the frame frequency control is 4 bits, and the size of the minimum balance unit is 2 raised to the power of 4. That is, the minimum balance unit can be 4*4 in size, consisting of 16 squares. That is, the shape of the minimum balance unit should be a square.

[0037] In some embodiments, the carry-in points correspond to the squares in the first minimum balance unit. The squares identified as carry-in points have their corresponding pixel gray levels increased by 1 when dithering is performed. The squares not identified as carry-in points have their corresponding pixel gray levels unchanged when dithering is performed.

[0038] In some embodiments, the low N-bit data of the original data is obtained, and the target number of carry-in points is determined according to the low N-bit data. For example, if the number of dithering gray levels corresponding to the frame frequency control is 4 bits, the low 4-bit data of the original data is obtained. The target number of carry-in points is determined according to the low 4-bit data. For example, if the low 4-bit data is "0000", the target number of carry-in points is 0. If the low 4-bit data is "0001", the target number of carry-in points is 1. If the low 4-bit data is "0010", the target number of carry-in points is 2. If the low 4-bit data is "0011", the target number of carry-in points is 3. If the low 4-bit data is "0100", the target number of carry-in points is 4. If the low 4-bit data is "0000", the target number of carry-in points is 0. That is, the low 4-bit data can determine the number of carry-in points in the range of 0-15.

[0039] Step 12: In response to the target number of carry-in points being less than 4, a first minimum period unit with 4 carry-in points is obtained.

[0040] In some embodiments, the first minimum period unit includes 4 first minimum balance units, each first minimum balance unit is different from each other, and each first minimum balance unit has 4 carry-in points. The 4 first minimum balance units are superimposed without overlapping carry-in points, and each first minimum balance unit is polarity balanced.

[0041] In some embodiments, the first minimum period unit with 4 carry-in points can be constructed in advance. That is, the first minimum period unit includes 4 first minimum balance units, each first minimum balance unit is different from each other, and each first minimum balance unit has 4 carry-in points. The 4 first minimum balance units are superimposed without overlapping carry-in points, and each first minimum balance unit is polarity balanced.

[0042] In some embodiments, the first minimum period unit with 4 carry-in points can be constructed in real time. For example, after determining the size of the first minimum balance unit and the target number of carry-in points, the first minimum period unit is constructed in advance according to the following manner: the first minimum period unit includes 4 first minimum balance units, each first minimum balance unit is different from each other, and each first minimum balance unit has 4 carry-in points. The 4 first minimum balance units are superimposed without overlapping carry-in points, and each first minimum balance unit is polarity balanced.

[0043] In some embodiments, the first minimum period unit with 4 carry-in points is constructed in real time in combination with the following steps: Figure 9 The first minimum period unit with 4 carry-in points is described as follows:Figure 9 The four-frame carry-in point distribution diagram (1 represents gray level +1) of the smallest 4*4 unit (the first smallest balance unit) with the number of carry-in points being 4 is as follows: Figure 9 It can be seen that the polarity distribution of the first frame is balanced (the number of + and the number of - are equal), the polarity distribution of the second frame is balanced, the polarity distribution of the third frame is balanced, and the polarity distribution of the fourth frame is balanced. In addition, it can also be seen from the carry-in overlap diagram that the carry-in point overlap of each position after four frames is balanced. The carry-in is easy to balance, and the most fundamental reason is that the FRC grid is 4*4, so that the carry-in 4 is evenly distributed by 1 in the row and column to balance the carry-in points, and the polarity is opposite in adjacent columns, so the polarity is also easy to balance. Among them, Figure 9 Only the column inversion mode (+++++++ / -------) and the row point inversion (+-+-+-) are taken as examples, and other inversion modes are similar.

[0044] In some embodiments, the number of dithering gray levels is 4 bits, and then four first smallest balance units are constructed according to the size of the smallest balance unit for the carry-in point 4.

[0045] Step 13: According to the four-frame first smallest balance unit, a second smallest periodic unit is constructed for the target number of carry-in points.

[0046] In some embodiments, the second smallest periodic unit includes four second smallest balance units, each second smallest balance unit is different from each other, adjacent second smallest balance units have a total number of carry-in points that is a multiple of 4, the carry-in points do not overlap after superposition of the four second smallest balance units, and each second smallest balance unit is polarity balanced.

[0047] In some embodiments, in response to the target number of carry-in points being less than 4, it is indicated that the target number of carry-in points can be 0, 1, 2, or 3. When the number of carry-in points is 0, it indicates that there is no grid that needs to be carried in the smallest balance unit, and therefore no further description is given. The present application focuses on the scenarios where the target number of carry-in points is 1, 2, or 3.

[0048] In some embodiments, the four-frame first smallest balance unit corresponding to the carry-in point 4 includes a first-frame first smallest balance unit, a second-frame first smallest balance unit, a third-frame first smallest balance unit, and a fourth-frame first smallest balance unit. Step 13 can be the following flow: Step 21: In response to the target number of carry-in points being 1, the size of the second smallest balance unit is determined.

[0049] In some embodiments, the size of the second smallest balance unit is 4 times the size of the first smallest balance unit. For example, if the size of the first smallest balance unit is 4*4, the size of the second smallest balance unit is 8*8. For example, if the size of the first smallest balance unit is 8*8, the size of the second smallest balance unit is 16*16.

[0050] Step 22: According to the first minimum balance unit of the first frame, the first minimum balance unit of the second frame, the first minimum balance unit of the third frame and the first minimum balance unit of the fourth frame, a second minimum balance unit is constructed for the target carry point number.

[0051] In some embodiments, the 4-frame second minimum balance unit includes a first-frame second minimum balance unit, a second-frame second minimum balance unit, a third-frame second minimum balance unit and a fourth-frame second minimum balance unit; each second minimum balance unit is divided into a first region, a second region, a third region and a fourth region. The size of the first region, the second region, the third region and the fourth region is the same as the size of the first minimum balance unit. Step 22 can be the following flow: Step 31: The first minimum balance unit of the first frame, the first minimum balance unit of the second frame, the first minimum balance unit of the third frame and the first minimum balance unit of the fourth frame are respectively divided into first minimum balance units with two carry points in a column equal division manner.

[0052] In some embodiments, Figure 9 The first minimum balance unit of the first frame, the first minimum balance unit of the second frame, the first minimum balance unit of the third frame and the first minimum balance unit of the fourth frame are divided into first minimum balance units with two carry points, as shown in Figure 10 The first minimum balance unit of the first frame is divided into a first minimum balance unit a and a first minimum balance unit b, the first minimum balance unit of the second frame is divided into a first minimum balance unit c and a first minimum balance unit d, the first minimum balance unit of the third frame is divided into a first minimum balance unit e and a first minimum balance unit f, and the first minimum balance unit of the fourth frame is divided into a first minimum balance unit g and a first minimum balance unit h.

[0053] Step 32: The 8 first minimum balance units with two carry points are distributed to the first-frame second minimum balance unit, the second-frame second minimum balance unit, the third-frame second minimum balance unit and the fourth-frame second minimum balance unit to obtain the first-frame second minimum balance unit, the second-frame second minimum balance unit, the third-frame second minimum balance unit and the fourth-frame second minimum balance unit.

[0054] Among them, only one of the same regions of the adjacent frame second minimum balance unit has a carry point, and there are 4 carry points in each frame second minimum balance unit. The number of carry points in the diagonal regions of each frame second minimum balance unit is the same, and the directions of the carry points in the two regions with carry points in each frame second minimum balance unit are different.

[0055] Among them, the number of carry points in one region of the same region of the adjacent frame second minimum balance unit is 0, and the number of carry points in the other region is 2.

[0056] In some embodiments, the combination of Figure 10 , Figure 11 and Figure 12 is illustrated: Because the carry-in point 1 is odd, the polarity cannot be balanced in the frame, at this time other even carry-in is needed to jitter, the nearest even number is 2 and 0, then 2 / 0 / 2 / 0 is used to jitter. At this time, 2 (because no actual 2 is used, defined as pseudo 2A) still needs to be intercepted from carry-in 4, that is, the first two columns or the first two rows of a frame, the last two columns or the last two rows of a frame, which can be divided as shown in Figure 10 .

[0057] The internal principle can be illustrated in combination with Figure 11 and Figure 12 , the first two columns or the first two rows of carry-in 4 need to be separated (to ensure absolute balance of polarity). As shown in Figure 10 , the first two columns and the last two columns of carry-in 4 are separated. Then, the division is performed in the manner of Figure 12 . Then, A1+A3=the first frame of carry-in 4 (that is, A1 corresponds to the first minimum balance unit a, and A3 corresponds to the first minimum balance unit b); B2+B4=the second frame of carry-in 4 (that is, B2 corresponds to the first minimum balance unit c, and B4 corresponds to the first minimum balance unit d); C2+C4=the fourth frame of carry-in 4 (that is, C2 corresponds to the first minimum balance unit g, and C4 corresponds to the first minimum balance unit h); D1+D3=the third frame of carry-in 4 (that is, D1 corresponds to the first minimum balance unit e, and D3 corresponds to the first minimum balance unit f), to ensure that the pattern after overlapping is as shown in Figure 11 . Each 4*4 square is distributed inconsistently to ensure that the pattern at each position in the frame is different, so that the FRC pattern is irregular; it is necessary to ensure that the carry-in number on the diagonal line is the same to avoid horizontal or vertical lines; it is necessary to ensure that the direction indicated by the arrow in Figure 11 is inconsistent to avoid diagonal lines. It can be understood that the B1, B3, A2, A4, C1, C2, D2, and D4 regions are all carry-in 0, that is, no carry-in point is set.

[0058] Similarly, the first frame first minimum balance unit, the second frame first minimum balance unit, the third frame first minimum balance unit, and the fourth frame first minimum balance unit can be divided into first minimum balance units with two carry-in points in a row division manner. Then, the first frame second minimum balance unit, the second frame second minimum balance unit, the third frame second minimum balance unit, and the fourth frame second minimum balance unit are obtained in the manner of step 32.

[0059] In some embodiments, the four-frame first minimum balance unit includes: a first frame first minimum balance unit, a second frame first minimum balance unit, a third frame first minimum balance unit, and a fourth frame first minimum balance unit. Step 13 can also be the following process: Step 41: In response to the target number of entry points being 2, determine the size of the second minimum balance unit.

[0060] The size of the second minimum balancing unit is the same as the size of the first minimum balancing unit.

[0061] Step 42: Based on the first minimum balance unit of the first frame, the first minimum balance unit of the second frame, the first minimum balance unit of the third frame, and the first minimum balance unit of the fourth frame, construct the second minimum periodic unit for the target number of carry points.

[0062] In some embodiments, the 4-frame second minimum balance unit includes a first frame second minimum balance unit, a second frame second minimum balance unit, a third frame second minimum balance unit, and a fourth frame second minimum balance unit. Step 42 can be the following process: Step 51: Obtain two carry points from the first minimum balance unit of the first frame to obtain the second minimum balance unit of the first frame; Step 52: Obtain two carry points from the first minimum balance unit of the second frame to obtain the second minimum balance unit of the second frame; Step 53: Obtain two carry points from the first minimum balance unit of the third frame to obtain the second minimum balance unit of the third frame; Step 54: Obtain two carry points from the first minimum balance unit of the fourth frame to obtain the second minimum balance unit of the fourth frame.

[0063] Among them, the entry point distribution image after superimposing the second minimum balance unit of the first frame, the second minimum balance unit of the second frame, the second minimum balance unit of the third frame, and the second minimum balance unit of the fourth frame is balanced, and the entry points in the entry point distribution image are discontinuous.

[0064] In some embodiments, combined with Figure 13 and Figure 14 Explanation: like Figure 13 ,from Figure 9 Extracting from a carry-in of 4; the polarity needs to be balanced within each frame, the carry distribution across four overlapping frames needs to be balanced, the density distribution should be as uniform as possible, and there should be no consecutive 2 or 4 0 / 1 values. For example... Figure 14 The captured portion does not meet the requirements.

[0065] In some embodiments, the 4-frame first minimum balance unit corresponding to the carry-in point 4 comprises a first-frame first minimum balance unit, a second-frame first minimum balance unit, a third-frame first minimum balance unit, and a fourth-frame first minimum balance unit. Step 13 can be the following flow: Step 61: In response to the target number of carry-in points being 3, the size of the second minimum balance unit is determined.

[0066] The size of the second minimum balance unit is 4 times the size of the first minimum balance unit.

[0067] Step 62: According to the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit, and the fourth-frame first minimum balance unit, a second minimum balance unit is constructed for the target number of carry-in points.

[0068] In some embodiments, the 4-frame second minimum balance unit comprises a first-frame second minimum balance unit, a second-frame second minimum balance unit, a third-frame second minimum balance unit, and a fourth-frame second minimum balance unit; each second minimum balance unit is divided into a first region, a second region, a third region, and a fourth region. Step 62 can be the following flow: Step 71: For the first region in the 4-frame second minimum balance unit, one first target minimum balance unit, two second target minimum balance units, and one third target minimum balance unit are determined from the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit, and the fourth-frame first minimum balance unit; the first target minimum balance unit is divided into two first minimum balance units each having two carry-in points in a column-wise or row-wise manner; the two first minimum balance units each having two carry-in points are distributed in non-adjacent first regions in the 4-frame second minimum balance unit, and the two second target minimum balance units are distributed in different remaining first regions; wherein the distribution pattern of all first regions without carry-in 0 after superposition is the same as the pattern of the third target minimum balance unit.

[0069] Step 72: for the second region in the 4-frame second minimum balance unit, one fourth target minimum balance unit, two fifth target minimum balance units and one sixth target minimum balance unit are determined from the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit and the fourth-frame first minimum balance unit; the fourth target minimum balance unit is divided into two first minimum balance units with two carry points in a column equal division manner or a row equal division manner; the two first minimum balance units with two carry points are distributed in non-adjacent second regions in the 4-frame second minimum balance unit, and the two fifth target minimum balance units are distributed in the remaining different second regions; wherein the distribution pattern of all the second regions without carry 0 after superposition is the same as the pattern of the sixth target minimum balance unit.

[0070] Step 73: for the third region in the 4-frame second minimum balance unit, one seventh target minimum balance unit, two eighth target minimum balance units and one ninth target minimum balance unit are determined from the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit and the fourth-frame first minimum balance unit; the seventh target minimum balance unit is divided into two first minimum balance units with two carry points in a column equal division manner or a row equal division manner; the two first minimum balance units with two carry points are distributed in non-adjacent third regions in the 4-frame second minimum balance unit, and the two eighth target minimum balance units are distributed in the remaining different third regions; wherein the distribution pattern of all the third regions without carry 0 after superposition is the same as the pattern of the ninth target minimum balance unit.

[0071] Step 74: for the fourth region in the 4-frame second minimum balance unit, one tenth target minimum balance unit, two eleventh target minimum balance units and one twelfth target minimum balance unit are determined from the first-frame first minimum balance unit, the second-frame first minimum balance unit, the third-frame first minimum balance unit and the fourth-frame first minimum balance unit; the tenth target minimum balance unit is divided into two first minimum balance units with two carry points in a column equal division manner or a row equal division manner; the two first minimum balance units with two carry points are distributed in non-adjacent fourth regions in the 4-frame second minimum balance unit, and the two eleventh target minimum balance units are distributed in the remaining different fourth regions; wherein the distribution pattern of all the fourth regions without carry 0 after superposition is the same as the pattern of the twelfth target minimum balance unit; wherein the number of carry points of the same regions of the adjacent-frame second minimum balance units is different, there are 12 carry points in each frame second minimum balance unit, the number of carry points in the diagonal regions of each frame second minimum balance unit is the same, and the direction of the carry points between the diagonal regions in each frame second minimum balance unit is different.

[0072] In the second minimum balance unit of adjacent frames, the number of carry points in one region is 2, and the number of carry points in the other region is 4.

[0073] In some embodiments, combined with Figure 15 Explanation: Its internal principle is as follows: Carrying 4 uses... Figure 9 For the 4, the carry-in 2 needs to use the pseudo-2B scheme, that is, what kind of overlapping pattern needs to be formed for the 0 carry-in (refer to the pattern of the carry-in 4. Regardless of whether it is a carry-in overlapping pattern or a short-out overlapping pattern, the jitter pattern (pattern) of 4 has a carry point in each row and column and the polarity is balanced, so the overlapping scheme is the best). Therefore, the 2 split from 4 is not selected.

[0074] like Figure 15 As shown, A1 + A3 = the third frame of carry-4, A2 is the first frame of carry-4, and A4 is the fourth frame of carry-4. It can be seen that the second frame is missing, so the pattern formed by A1 + A2 + A3 + A4 (the distribution of non-carry 0s) will be the same overlapping pattern as the second frame of carry-4. Similarly, B2 + B4 = the second frame of carry-4, B1 is the fourth frame of carry-4, and B3 is the third frame of carry-4. Again, the first frame is missing, so the pattern formed by B1 + B2 + B3 + B4 (the distribution of non-carry 0s) will be the same overlapping pattern as the first frame of carry-4. Finally, C2 + C4 = the fourth frame of carry-4, C1 is the first frame of carry-4, and C3 is the second frame of carry-4. Again, the third frame is missing, so the pattern formed by C1 + C2 + C3 + C4 (the distribution of non-carry 0s) will be the same overlapping pattern as the third frame of carry-4. D1+D3 = the second frame of carry 4, D2 is the third frame of carry 4, and D4 is the first frame of carry 4. It can be seen that the fourth frame is missing. Therefore, the pattern formed by D1+D2+D3+D4 (the distribution of non-carry 0) will be the same overlapping pattern as the fourth frame of carry 4.

[0075] To ensure that the patterns formed after four frames are different within an 8x8 grid, the overlapping patterns formed by each 4x4 square in the 8x8 grid must be different. This is to prevent the FRC display pattern from being completely identical over a large area, which could lead to abnormal FRC textures. Therefore, it is necessary to ensure that the textures formed at positions A, B, C, and D are not the same. If A is already the second frame with a carry-in of 4, then B can be the first frame with a carry-in of 4, C can be the third frame with a carry-in of 4, and D can be the fourth frame with a carry-in of 4. Of course, other permutations and combinations are also possible, as long as A, B, C, and D are different.

[0076] Step 14: Perform grayscale jittering based on the second minimum periodic unit.

[0077] In some embodiments, the dithering can be performed in the order of 4-frame second minimum balance units in a second minimum period unit.

[0078] As can be seen above, in addition to considering the "±" polarity balance of carry 4, 1 / 2 / 3 are not considered because the second minimum balance units of dithering all come from carry 4; only the balance of the number of carry points needs to be considered, i.e., the overlapping pattern OK.

[0079] Because carry 4, whether it is a carry point or a polarity balance, is very good, it greatly reduces the production cycle of the FRC dithering pattern, guarantees the FRC display balance, makes the display easier to balance, and thus the FRC anomaly is easier to avoid.

[0080] In summary, the balance of carries 1 / 2 / 3 / 4 is divided into polarity balance and balance of the number of carry points.

[0081] The polarity balance only needs to consider carry 4, and based on carry 4, carries 1 / 2 / 3 only do the balance of the number of carry points.

[0082] The dithering patterns of carries 1 / 2 / 3 all come from the dithering patterns of carry 4.

[0083] Carry 2 does subtraction on carry 4, and the overlapping patterns of 4 frames later are arranged with or without carry.

[0084] Carry 1 dithers by false carry 2 and carry 0, and the overlapping patterns in the 8*8 grid are all different, including all carry 4 patterns, which ensures that 8*8 will not be too regular to cause FRC lines.

[0085] Carry 3 dithers by false carry 2 and carry 4, and the overlapping patterns in the 8*8 grid are all different, including all carry 4 patterns, which ensures that 8*8 will not be too regular to cause FRC lines.

[0086] Referring to Figure 16 , Figure 16 is a structural schematic diagram of an embodiment of the display driving apparatus provided in the present application. The display driving apparatus 300 includes a processing chip 301 and a memory 302, and the memory 302 stores at least one computer program. When the at least one computer program is loaded and executed by the processing chip 301, the at least one computer program is used to implement the following method: According to the frame frequency control corresponding to the number of dithering gray scales, the size of the first minimum balance unit and the target carry point number are determined; in response to the target carry point number being less than 4, a first minimum period unit with a carry point number of 4 is obtained; the first minimum period unit includes 4 frames of first minimum balance units, each of the first minimum balance units is different from each other, and each of the first minimum balance units has 4 carry points, the 4 first minimum balance units are superimposed without overlapping the carry points, and each of the first minimum balance units is polarity balanced; according to the 4 frames of first minimum balance units, a second minimum period unit for the target carry point number is constructed, wherein the second minimum period unit includes 4 frames of second minimum balance units, each of the second minimum balance units is different from each other, and adjacent second minimum balance units have a total number of carry points which is a multiple of 4, the 4 frames of second minimum balance units are superimposed without overlapping the carry points, and each of the second minimum balance units is polarity balanced; and the gray scale dithering is performed according to the second minimum period unit.

[0087] It can be understood that at least one computer program is loaded and executed by the processing chip 301, and is used to implement the method of any one of the above embodiments.

[0088] Referring to Figure 17 , Figure 17 is a structural schematic diagram of an embodiment of a display panel provided by the present application. The display panel 400 includes a display driving apparatus 300. The display driving apparatus 300 can be the display driving apparatus 300 described above.

[0089] Referring to Figure 18 , Figure 18 is a structural schematic diagram of an embodiment of a display device provided by the present application. The display device 500 includes a display panel 400 and a display driving apparatus 300. The display panel 400 can be the display panel 400 described above. The display driving apparatus 300 is used to drive the display panel 400 to display.

[0090] In summary, the display gray scale dithering method, the display driving device 300, and the display device 500 provided in the present application determine the size of the first minimum balance unit and the number of target carry-in points according to the number of dithered gray scales corresponding to the frame frequency; in response to the number of target carry-in points being less than 4, a first minimum period unit with a carry-in point number of 4 is obtained; the first minimum period unit includes 4 first minimum balance units, each of which is different from each other, and each of which has 4 carry-in points, and the carry-in points of the 4 first minimum balance units are not overlapped after being superimposed, and each of the first minimum balance units is polarity balanced; according to the 4 first minimum balance units, a second minimum period unit is constructed for the number of target carry-in points, wherein the second minimum period unit includes 4 second minimum balance units, each of which is different from each other, and the total number of carry-in points of adjacent second minimum balance units is a multiple of 4, the carry-in points of the 4 second minimum balance units are not overlapped after being superimposed, and each of the second minimum balance units is polarity balanced; and gray scale dithering is performed according to the second minimum period unit, which can reduce the occurrence of problems such as diagonal lines, horizontal lines, vertical lines, noise, and screen flicker in the dithering process, and improve the display quality.

[0091] In several embodiments provided in the present application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are only illustrative, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0092] The integrated units in the above other embodiments, if implemented in the form of software function units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0093] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made according to the content of the present application specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. A method of displaying gray scale dithering, characterized by, The method comprises: determining the size of the first minimum balance unit and the number of target carry points according to the number of dithering gray scales corresponding to the frame frequency control; in response to the number of target carry points being less than 4, obtaining a first minimum period unit with 4 carry points; the first minimum period unit comprises 4 frames of first minimum balance units, each of the first minimum balance units is different from each other, and each of the first minimum balance units has 4 carry points, the carry points of the 4 first minimum balance units are not overlapped after being superimposed, and each of the first minimum balance units is polarity balanced; constructing the second minimum period unit for the number of target carry points according to the 4 frames of first minimum balance units, wherein the second minimum period unit comprises 4 frames of second minimum balance units, each of the second minimum balance units is different from each other, and the total number of carry points of adjacent second minimum balance units is a multiple of 4, the carry points of the 4 frames of second minimum balance units are not overlapped after being superimposed, and each of the second minimum balance units is polarity balanced; performing gray scale dithering according to the second minimum period unit.

2. The display gray scale dithering method of claim 1, wherein, The 4 frames of first minimum balance units comprise a first frame of first minimum balance units, a second frame of first minimum balance units, a third frame of first minimum balance units, and a fourth frame of first minimum balance units; constructing the second minimum period unit for the number of target carry points according to the 4 frames of first minimum balance units, comprises: in response to the number of target carry points being 1, determining the size of the second minimum balance unit; wherein the size of the second minimum balance unit is 4 times the size of the first minimum balance unit; constructing the second minimum period unit for the number of target carry points according to the first frame of first minimum balance units, the second frame of first minimum balance units, the third frame of first minimum balance units, and the fourth frame of first minimum balance units.

3. The display gray scale dithering method of claim 2, wherein, The 4 frames of second minimum balance units comprise a first frame of second minimum balance units, a second frame of second minimum balance units, a third frame of second minimum balance units, and a fourth frame of second minimum balance units; each of the second minimum balance units is divided into a first region, a second region, a third region, and a fourth region; constructing the second minimum period unit for the number of target carry points according to the first frame of first minimum balance units, the second frame of first minimum balance units, the third frame of first minimum balance units, and the fourth frame of first minimum balance units, comprises: dividing the first frame of first minimum balance units, the second frame of first minimum balance units, the third frame of first minimum balance units, and the fourth frame of first minimum balance units into first minimum balance units with two carry points in a column equal division manner; or, dividing the first frame of first minimum balance units, the second frame of first minimum balance units, the third frame of first minimum balance units, and the fourth frame of first minimum balance units into first minimum balance units with two carry points in a row equal division manner; The eight first minimum balance units with two carry-in points are distributed into the first frame second minimum balance unit, the second frame second minimum balance unit, the third frame second minimum balance unit and the fourth frame second minimum balance unit, to obtain the first frame second minimum balance unit, the second frame second minimum balance unit, the third frame second minimum balance unit and the fourth frame second minimum balance unit; wherein, only one of the same regions of the adjacent frame second minimum balance units has a carry-in point, and there are four carry-in points in each frame second minimum balance unit, the number of carry-in points in the diagonal regions of each frame second minimum balance unit is the same, and the directions of the carry-in points in the two regions with carry-in points in each frame second minimum balance unit are different.

4. The display gray scale dithering method of claim 1, wherein, The four frames of first minimum balance units comprise a first frame first minimum balance unit, a second frame first minimum balance unit, a third frame first minimum balance unit and a fourth frame first minimum balance unit; The second minimum periodic unit is constructed for the target carry-in point number according to the four frames of first minimum balance units, comprising: In response to the target carry-in point number being 2, the size of the second minimum balance unit is determined; wherein, the size of the second minimum balance unit is the size of the first minimum balance unit; The second minimum periodic unit is constructed for the target carry-in point number according to the first frame first minimum balance unit, the second frame first minimum balance unit, the third frame first minimum balance unit and the fourth frame first minimum balance unit.

5. The display gray scale dithering method of claim 4, wherein, The four frames of second minimum balance units comprise a first frame second minimum balance unit, a second frame second minimum balance unit, a third frame second minimum balance unit and a fourth frame second minimum balance unit; the second minimum periodic unit is constructed for the target carry-in point number according to the first frame first minimum balance unit, the second frame first minimum balance unit, the third frame first minimum balance unit and the fourth frame first minimum balance unit, comprising: Two carry-in points are obtained from the first frame first minimum balance unit to obtain the first frame second minimum balance unit; Two carry-in points are obtained from the second frame first minimum balance unit to obtain the second frame second minimum balance unit; Two carry-in points are obtained from the third frame first minimum balance unit to obtain the third frame second minimum balance unit; Two carry-in points are obtained from the fourth frame first minimum balance unit to obtain the fourth frame second minimum balance unit; In the carry-in point distribution image after superimposition of the first frame second minimum balance unit, the second frame second minimum balance unit, the third frame second minimum balance unit and the fourth frame second minimum balance unit, the carry-in points are balanced, and the carry-in points in the carry-in point distribution image are discontinuous.

6. The display gray scale dithering method of claim 1, wherein, The four frames of first minimum balance units comprise a first frame first minimum balance unit, a second frame first minimum balance unit, a third frame first minimum balance unit and a fourth frame first minimum balance unit; The second minimum period unit for the target carry point number is constructed according to the four first minimum balance units, and the method comprises the steps of: In response to the target carry point number being 3, the size of the second minimum balance unit is determined, wherein the size of the second minimum balance unit is 4 times the size of the first minimum balance unit; The second minimum period unit for the target carry point number is constructed according to the first frame first minimum balance unit, the second frame first minimum balance unit, the third frame first minimum balance unit and the fourth frame first minimum balance unit.

7. The display gray scale dithering method of claim 6, wherein, The four second minimum balance units comprise a first frame second minimum balance unit, a second frame second minimum balance unit, a third frame second minimum balance unit and a fourth frame second minimum balance unit; Each of the second minimum balance units is divided into a first area, a second area, a third area and a fourth area, and the second minimum period unit for the target carry point number is constructed according to the first frame first minimum balance unit, the second frame first minimum balance unit, the third frame first minimum balance unit and the fourth frame first minimum balance unit. For the first area in the four second minimum balance units, one first target minimum balance unit, two second target minimum balance units and one third target minimum balance unit are determined from the first frame first minimum balance unit, the second frame first minimum balance unit, the third frame first minimum balance unit and the fourth frame first minimum balance unit; The first target minimum balance unit is divided into two first minimum balance units each having two carry points in a column equal division manner or a row equal division manner; The two first minimum balance units each having two carry points are distributed in non-adjacent first areas in the four second minimum balance units, and the two second target minimum balance units are distributed in different remaining first areas respectively; wherein the distribution pattern of all the first areas after superposition without carry 0 is the same as the pattern of the third target minimum balance unit; For the second area in the four second minimum balance units, one fourth target minimum balance unit, two fifth target minimum balance units and one sixth target minimum balance unit are determined from the first frame first minimum balance unit, the second frame first minimum balance unit, the third frame first minimum balance unit and the fourth frame first minimum balance unit; The fourth target minimum balance unit is divided into two first minimum balance units each having two carry points in a column equal division manner or a row equal division manner; The two first minimum balance units each having two carry points are distributed in non-adjacent second areas in the four second minimum balance units, and the two fifth target minimum balance units are distributed in different remaining second areas respectively; wherein the distribution pattern of all the second areas after superposition without carry 0 is the same as the pattern of the sixth target minimum balance unit; For the third region in the four frames of the second minimum balance unit, one seventh target minimum balance unit, two eighth target minimum balance units and one ninth target minimum balance unit are determined from the first frame of the first minimum balance unit, the second frame of the first minimum balance unit, the third frame of the first minimum balance unit and the fourth frame of the first minimum balance unit; The seventh target minimum balance unit is divided into two first minimum balance units each having two carry points in a column equal division manner or a row equal division manner; The two first minimum balance units each having two carry points are distributed in non-adjacent third regions in the four frames of the second minimum balance unit, and the two eighth target minimum balance units are distributed in the remaining different third regions respectively; wherein the distribution pattern of all the third regions after superposition without carry 0 is the same as the pattern of the ninth target minimum balance unit; For the fourth region in the four frames of the second minimum balance unit, one tenth target minimum balance unit, two eleventh target minimum balance units and one twelfth target minimum balance unit are determined from the first frame of the first minimum balance unit, the second frame of the first minimum balance unit, the third frame of the first minimum balance unit and the fourth frame of the first minimum balance unit; The tenth target minimum balance unit is divided into two first minimum balance units each having two carry points in a column equal division manner or a row equal division manner; The two first minimum balance units each having two carry points are distributed in non-adjacent fourth regions in the four frames of the second minimum balance unit, and the two eleventh target minimum balance units are distributed in the remaining different fourth regions respectively; wherein the distribution pattern of all the fourth regions after superposition without carry 0 is the same as the pattern of the twelfth target minimum balance unit; Wherein, the number of carry points in the same regions of adjacent frame second minimum balance units is different, and there are 12 carry points in each frame of the second minimum balance unit, the number of carry points in the diagonal regions in each frame of the second minimum balance unit is the same, and the direction of the carry points between the diagonal regions in each frame of the second minimum balance unit is different.

8. The display gray scale dithering method of claim 7, wherein, The number of carry points in one region of the same regions of adjacent frame second minimum balance units is 2, and the number of carry points in the other region is 4.

9. A display driving device, characterized by comprising: The device comprises a processing chip and a memory, and the memory stores at least one computer program, which is loaded and executed by the processing chip to implement the method of any one of claims 1-8.

10. A display device, characterized by comprising: The device comprises a display panel and the display driving apparatus of claim 9, and the display driving apparatus is used to drive the display panel to display.

Images