Liquid crystal display panel and compensation method thereof

Abstract

The application discloses a liquid crystal display panel and a compensation method thereof. The compensation method comprises the following steps: acquiring a plurality of continuous and alternating odd frame gray scale data and even frame gray scale data, determining the minimum gray scale difference, determining the gamma voltage difference corresponding to the gray scale difference according to the relationship curve between the gray scale and the gamma voltage, and obtaining the correction value of the common voltage based on the gamma voltage difference. The flicker phenomenon can be improved by adjusting the common voltage only once through the correction value.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a liquid crystal display panel and a compensation method therefor. Background Art

[0002] Liquid crystal display panels use alternating current drive. Since the input signals in the positive and negative half-cycles are affected by the feedthrough voltage, the clamping voltages of the liquid crystal in the positive and negative half-cycles are different, resulting in different picture brightness and thus flicker phenomena.

[0003] The above-mentioned flicker is usually adjusted under a fixed pattern, and the flicker value is measured by a corresponding optical instrument. This process usually requires several steps of "adjusting the common voltage - measuring the flicker value" to gradually approximate the flicker value. For example, the dichotomy method used in the prior art requires about 8 iterations to obtain the required flicker value, which leads to the problem that the adjustment of flicker requires multiple iterations. Summary of the Invention

[0004] This application provides a liquid crystal display panel and a compensation method therefor to alleviate the technical problem that the adjustment of flicker requires multiple iterations.

[0005] In a first aspect, this application provides a compensation method for a liquid crystal display panel. The liquid crystal display panel includes a plurality of pixel units distributed in an array, and each pixel unit includes a plurality of sub-pixels with alternating polarities in the row direction and the column direction. The compensation method includes: obtaining a plurality of consecutive and alternating odd-frame grayscale data and even-frame grayscale data, where two adjacent pixel units have opposite single polarities in one of the odd-frame grayscale data or the even-frame grayscale data, and the plurality of pixel units display a black screen in the other of the odd-frame grayscale data or the even-frame grayscale data; determining the minimum grayscale difference between adjacent pixel units based on one of the odd-frame grayscale data or the even-frame grayscale data; determining the gamma voltage difference corresponding to the grayscale difference according to the relationship curve between grayscale and gamma voltage; and obtaining the correction value of the common voltage based on the gamma voltage difference.

[0006] In some embodiments, each pixel unit includes a plurality of first sub-pixels and second sub-pixels with alternating polarities in the row direction and the column direction. The fact that two adjacent pixel units have opposite single polarities in one of the odd-frame grayscale data or the even-frame grayscale data includes: setting all the first sub-pixels and all the second sub-pixels in one pixel unit to display with zero grayscale and non-zero grayscale respectively; and setting all the first sub-pixels and all the second sub-pixels in an adjacent pixel unit to display with non-zero grayscale and zero grayscale respectively.

[0007] In some of these embodiments, for multiple pixel units to display a black screen in either the odd-frame grayscale data or the even-frame grayscale data, it includes: setting all the first sub-pixels and all the second sub-pixels in each pixel unit to display with zero grayscale.

[0008] In some of these embodiments, each pixel unit includes multiple first sub-pixels and second sub-pixels that are alternately distributed in terms of polarity in the row direction and the column direction, which includes: setting the first sub-pixels and the second sub-pixels to be alternately distributed in the row direction and the column direction; configuring one of the first sub-pixels or the second sub-pixels to have a positive polarity and the other of the first sub-pixels or the second sub-pixels to have a negative polarity.

[0009] In some of these embodiments, the step of determining the minimum grayscale difference between adjacent pixel units based on one of the odd-frame grayscale data or the even-frame grayscale data includes: obtaining the grayscale of each pixel unit based on one of the odd-frame grayscale data or the even-frame grayscale data; obtaining the grayscale difference between adjacent pixel units according to the grayscale of each pixel unit; and determining the minimum grayscale difference from the grayscale differences between adjacent pixel units.

[0010] In some of these embodiments, the step of determining the gamma voltage difference corresponding to the grayscale difference according to the relationship curve between the grayscale and the gamma voltage includes: setting the gamma voltage to be divided into a positive half-cycle gamma voltage and a negative half-cycle gamma voltage; setting the common voltage to be greater than the negative half-cycle gamma voltage and less than the positive half-cycle gamma voltage; and determining that the gamma voltage difference is as shown in formula (1-1):

[0011] deltagammaV = (V0 - V6) * ΔV / 255 (1-1)

[0012] Where deltagammaV is the gamma voltage difference, V0 is the maximum value of the positive half-cycle gamma voltage, V6 is the minimum value of the positive half-cycle gamma voltage, and △V is the minimum grayscale difference.

[0013] In some of these embodiments, the step of obtaining the correction value of the common voltage based on the gamma voltage difference includes: determining that half of the gamma voltage difference is the correction value.

[0014] In some of these embodiments, after the step of obtaining the correction value of the common voltage based on the gamma voltage difference, it further includes: superimposing the correction value onto the initial common voltage to obtain the target common voltage; and controlling the twist of the liquid crystal based on the target common voltage, the positive half-cycle gamma voltage, and the negative half-cycle gamma voltage. <000003​​​Second aspect, the present application provides a liquid crystal display panel, which executes the compensation method in at least one of the above embodiments.

[0017] For the liquid crystal display panel and its compensation method provided by the present application, by first obtaining multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data, one of two adjacent pixel units has an opposite single polarity in either the odd-frame grayscale data or the even-frame grayscale data, and multiple pixel units display a black screen in the other of the odd-frame grayscale data or the even-frame grayscale data. Then, based on one of the odd-frame grayscale data or the even-frame grayscale data, the minimum grayscale difference between adjacent pixel units is determined. Then, according to the relationship curve between the grayscale and the gamma voltage, the gamma voltage difference corresponding to the grayscale difference is determined. Then, based on the gamma voltage difference, the correction value of the common voltage is obtained. The flicker phenomenon can be improved by adjusting the common voltage only once with this correction value, without the need for multiple inefficient iterations.

[0018] Moreover, the improvement of flicker can also be completed through dynamic images such as multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data. Compared with the fact that flicker is usually adjusted under a fixed pattern, this expands the types of patterns required for adjusting flicker.

[0019] Moreover, multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data can be obtained through one photograph taken by a camera, and based on the odd-frame grayscale data and the even-frame grayscale data, the corresponding grayscale difference can be identified as the basis for judging the magnitude of the flicker value. Compared with the existing method of measuring the flicker value through a corresponding optical instrument, the frequency of using the optical instrument is reduced, thereby improving the adjustment efficiency of flicker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following will make the technical solutions and other beneficial effects of the present application obvious by describing the specific embodiments of the present application in detail in conjunction with the drawings.

[0021] Figure 1 It is a schematic diagram of the relationship between the common voltage, the gamma voltage, and the brightness in the related art.

[0022] Figure 2 It is a schematic diagram of the structure of the fixed pattern used for adjusting flicker in the related art.

[0023] Figure 3 It is another schematic diagram of the structure of the fixed pattern used for adjusting flicker in the related art.

[0024] Figure 4 It is a schematic diagram of calculating the flicker value through an optical instrument in the related art.

[0025] Figure 5 It is a schematic flowchart of the compensation method provided by the embodiment of the present application.

[0026] Figure 6 Schematic diagram of the frame grayscale data provided by the embodiments of the present application.

[0027] Figure 7 Schematic diagram of the distribution of pixel units provided by the embodiments of the present application.

[0028] Figure 8 Schematic diagram of a structure of pixel units provided by the embodiments of the present application.

[0029] Figure 9 Another schematic diagram of the structure of pixel units provided by the embodiments of the present application.

[0030] Figure 10 Schematic diagram of obtaining grayscale by taking pictures provided by the embodiments of the present application.

[0031] Figure 11 Schematic diagram of the original relationship curve between gamma voltage and grayscale provided by the embodiments of the present application.

[0032] Figure 12 Schematic diagram of grayscale compensation provided by the embodiments of the present application.

[0033] Figure 13 Schematic diagram of grayscale difference provided by the embodiments of the present application.

[0034] Figure 14 The first schematic diagram of the function of grayscale difference provided by the embodiments of the present application.

[0035] Figure 15 The second schematic diagram of the function of grayscale difference provided by the embodiments of the present application.

[0036] [[ID=E15]]Figure 16 Schematic diagram of the simplified relationship curve between gamma voltage and grayscale provided by the embodiments of the present application. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0038] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "plural" means two or more, unless otherwise specifically defined.

[0039] Since the liquid crystal display panel uses AC driving, the input signals in the positive and negative half-cycles are affected by the feedthrough voltage, resulting in different liquid crystal clamping pressures in the positive and negative half-cycles and different picture brightnesses, so there will be a flicker phenomenon.

[0040] Therefore, by adopting the method of adjusting the common voltage (VCOM) as shown in the left figure below, the liquid crystal clamping pressures in the positive and negative half-cycles are balanced, thereby reducing the flicker value; where the liquid crystal clamping pressure in the positive half-cycle is (gammaV+)-VCOM, and the liquid crystal clamping pressure in the negative half-cycle is VCOM-(gammaV-). gammaV+ is the gamma voltage in the positive half-cycle, and gammaV- is the gamma voltage in the negative half-cycle. Figure 1

[0041] The adjustment of the flicker value is actually to find a common voltage to make the flicker value minimum (the trough of the curve), as shown in the right figure below. Figure 1 Specifically, as the common voltage increases, the brightness difference (Max lux - Min lux) changes from the initial maximum brightness difference to the minimum brightness difference, and then changes back to the maximum brightness difference. The brightness difference corresponding to the trough of the curve is the smallest, and the corresponding common voltage at this time can make the liquid crystal clamping pressures in the positive and negative half-cycles approximate or equal, thereby reducing the flicker value.

[0042] The adjustment of the flicker value is usually completed under a fixed flicker adjustment pattern as shown below, and this pattern is determined by the driving architecture of the liquid crystal display panel. Figure 2 Figure 2 The pattern shown below shows a positive polarity in the Nth frame and a negative polarity in the (N + 1)th frame, so as to measure the brightness difference between the Nth frame and the (N + 1)th frame and calculate the flicker value. It can be understood that the smaller the flicker value, the better, that is, the brightness difference between the Nth frame and the (N + 1)th frame needs to be as small as possible, so as to improve the display effect.

[0043] Figure 3 Figure 2 Figure 3 The sub-pixel arrangement scheme shown below is another fixed flicker adjustment pattern. Compared with

[0044] [[ID=ed=27]] Figure 4 the display colors (RGB) of the sub-pixels can be ignored. Each square represents a sub-pixel.

[0044] The measurement of the flicker value is accomplished by a camera model CA310 or other optical instruments that support flicker value measurement. Specifically, Figure 4 Taking the CA310 camera as an example, the calculation method of the flicker value is as follows:

[0045] flicker=(max-min) / ((max+min) / 2)*100%

[0046] where flicker is the flicker value, max is the maximum brightness, and min is the minimum brightness.

[0047] However, using the above method, the minimum flicker value cannot be obtained by adjusting the common voltage once. This process usually requires several "adjusting the common voltage - measuring the flicker value" step-by-step approximations. The currently used dichotomy method requires about 8 iterations to obtain a smaller flicker value.

[0048] Therefore, in view of the technical problem that the adjustment of the flicker value mentioned above requires multiple iterations, this embodiment provides a liquid crystal display panel. Please refer to This liquid crystal display panel includes a plurality of pixel units distributed in an array. Each pixel unit includes a plurality of sub-pixels with alternately distributed polarities in the row direction and the column direction.

[0049] As Figures 5 to 16 shown, the compensation method of this liquid crystal display panel includes the following steps:

[0050] Step S10: Obtain multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data. One of two adjacent pixel units has an opposite single polarity in either the odd-frame grayscale data or the even-frame grayscale data, and the other of the multiple pixel units displays a black screen in either the odd-frame grayscale data or the even-frame grayscale data.

[0051] Step S20: Determine the minimum grayscale difference between adjacent pixel units based on either the odd-frame grayscale data or the even-frame grayscale data.

[0052] Step S30: Determine the gamma voltage difference corresponding to the grayscale difference according to the relationship curve between the grayscale and the gamma voltage.

[0053] Step S40: Obtain the correction value of the common voltage based on the gamma voltage difference.

[0054] It can be understood that the compensation method provided in this embodiment first obtains multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data. Among the odd-frame grayscale data or the even-frame grayscale data, two adjacent pixel units have opposite single polarities, and multiple pixel units display a black screen in the other of the odd-frame grayscale data or the even-frame grayscale data. Then, based on one of the odd-frame grayscale data or the even-frame grayscale data, the minimum grayscale difference between adjacent pixel units is determined. Then, according to the relationship curve between the grayscale and the gamma voltage, the gamma voltage difference corresponding to the grayscale difference is determined. Then, based on the gamma voltage difference, the correction value of the common voltage is obtained. By using this correction value to adjust the common voltage only once, the flicker phenomenon can be improved, and there is no need for less efficient multiple iterations.

[0055] Moreover, the dynamic picture composed of multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data can also complete the improvement of flicker. Compared with the fact that flicker is usually adjusted under a fixed pattern, this expands the types of patterns required for adjusting flicker.

[0056] Moreover, by taking a single photo with a camera, multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data can be obtained, and based on the odd-frame grayscale data and the even-frame grayscale data, the corresponding grayscale difference can be identified as the basis for judging the magnitude of the flicker value. Compared with the existing method of measuring the flicker value through corresponding optical instruments, the frequency of using optical instruments is reduced, and thus the adjustment efficiency of flicker is improved.

[0057] It should be noted that in this embodiment, by adjusting the common voltage only once, the flicker value can be reduced, and there is no need for less efficient multiple iterations. This improves the adjustment efficiency and is thus conducive to improving the production capacity of the liquid crystal display panel per unit time.

[0058] Among them, multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data, such as Figure 5 shown, the first frame can be odd-frame grayscale data, the second frame is even-frame grayscale data, the third frame can be odd-frame grayscale data, the fourth frame is even-frame grayscale data... and so on.

[0059] Figure 6 Taking the example that two adjacent pixel units have opposite single polarities in the odd-frame grayscale data and multiple pixel units display a black screen in the even-frame grayscale data. In other embodiments, two adjacent pixel units have opposite single polarities in the even-frame grayscale data and multiple pixel units display a black screen in the odd-frame grayscale data.

[0060] Among them, multiple pixel units distributed in an array can be as Figure 6It is located in the middle area or the central area of the liquid crystal display panel, so that the improvement of flicker can be achieved with fewer pixel units, rather than through all sub-pixels, reducing the amount of data processing.

[0061] In Figure 7 A represents pixel units showing one polarity, and B represents pixel units showing another polarity. Among them, one polarity can be one of positive polarity or negative polarity, and the other polarity can be the other of positive polarity or negative polarity. For example, when one polarity is positive polarity, the other polarity is negative polarity; or when one polarity is negative polarity, the other polarity is positive polarity.

[0062] From Figure 7 it can be seen that these pixel units are arranged in the ABAB manner along the row direction and in the ABA manner along the column direction.

[0063] Specifically, Figure 7 、 Figure 8 shows the specific structure of the pixel units. It can be seen that each pixel unit includes a plurality of first sub-pixels and second sub-pixels with alternating polarities in the row direction and the column direction. Among them, the row direction and the column direction include the row direction and the column direction. For example, in the pixel units shown in A, B, and C, the first row and the third row alternate repetitively with negative polarity (-) and positive polarity (+); the second row and the fourth row alternate repetitively with positive polarity (+) and negative polarity (-).

[0064] It should be noted that the pixel units shown in A and B are only illustrated by taking 4*4 sub-pixels as an example, and they can also be other sub-pixels distributed in an array. For example, in order to achieve color mixing display in space, each pixel unit can also include at least 9 sub-pixels distributed in an array, and at least 9 sub-pixels have three different colors.

[0065] In Figure 9 taking the sub-pixels with negative polarity as the first sub-pixels and the sub-pixels with positive polarity as the second sub-pixels, all first sub-pixels in the pixel unit shown in A are set to display with zero gray scale, and all second sub-pixels are set to display with non-zero gray scale. Since the brightness of the sub-pixels displaying with zero gray scale is very low (about 0.3 nit), in this case, it is difficult for the human eye to recognize the polarity of the sub-pixels displaying with zero gray scale. Therefore, the pixel unit shown in A has a single polarity, that is, positive polarity.

[0066] Similarly, in the pixel unit B adjacent to pixel unit A, all first sub-pixels are displayed with non-zero grayscale, and all second sub-pixels are displayed with zero grayscale. Since the brightness of the sub-pixels displayed with zero grayscale is very low (about 0.3 nit), it is difficult for the human eye to identify the polarity of the sub-pixels displayed with zero grayscale in this case. Therefore, the pixel unit shown in B has a single polarity, namely negative polarity.

[0067] It is understood that in other embodiments, the polarity of the pixel unit shown in A and the polarity of the pixel unit shown in B may also be interchanged.

[0068] exist Figure 8 In this case, when all the first sub-pixels and all the second sub-pixels located in the central area of ​​the liquid crystal display panel are displayed with zero grayscale, multiple pixel units can also achieve the display of a black screen or a completely black screen. The pixel unit shown in C can be understood as the sum of the pixel units shown in A and B.

[0069] like Figure 9 As shown, by taking a picture, the grayscale and corresponding brightness of the pixel unit shown in A and the pixel unit shown in B can be obtained. Since the pixel unit shown in A and the pixel unit shown in B have different polarities, if there is a brightness difference between the pixel unit shown in A and the pixel unit shown in B, a dividing line will be seen at the boundary between the pixel unit shown in A and the pixel unit shown in B in the photo.

[0070] One method involves controlling the camera's shutter speed to capture multiple grayscale frames in a single shot. For example, if the refresh rate of an LCD panel is 60Hz, which is 60 frames per second, setting the shutter speed to 1 second allows the camera's image sensor to continuously detect light (a process similar to integration), thus obtaining the brightness of these 60 frames.

[0071] From some frames, the grayscale of the pixel unit shown in A and the grayscale of the pixel unit shown in B can be obtained simultaneously, and the brightness corresponding to the grayscale can be obtained; while from other frames, the grayscale of the pixel unit shown in C can be obtained, and the corresponding grayscale is displayed as a black screen.

[0072] The relationship curve between grayscale and gamma voltage is as follows: Figure 10 As shown, the horizontal axis represents grayscale, for example, 00H-FFH represents grayscale 0-255; the vertical axis represents gamma voltage, which is divided into the positive half-cycle gamma voltage (gammaV+) indicating positive polarity and the negative half-cycle gamma voltage (gammaV-) indicating negative polarity. Among them, the common voltage (VCOM) is greater than the negative half-cycle gamma voltage (gammaV-) and less than the positive half-cycle gamma voltage (gammaV+).

[0073] exist Figure 11In the middle, the three large squares from left to right all represent... Figure 12 The pixel units distributed in an array in the central region shown are, in other words, Figure 7 The top right corner of the array shows pixel units A and B. In the first large square from left to right, X represents grayscale compensation, where "+" indicates increasing grayscale compensation and "-" indicates decreasing it, with the number representing the specific value of the grayscale compensation. Y represents the target grayscale for each pixel unit. Z is the sum of X and Y.

[0074] For example, for the pixel unit in the first row and first column of each large square, its target grayscale is 128, and its grayscale compensation is +4. Therefore, its compensated grayscale is Z = X + Y = 128 + 4 = 132. For the pixel unit in the first row and second column of each large square, its target grayscale is 128, and its grayscale compensation is -1. Therefore, its compensated grayscale is Z = X + Y = 128 - 1 = 127. Other pixels can be deduced similarly, and will not be elaborated further.

[0075] The target gray level can be any value between 0 and 255 gray levels, which can optimize the flickering corresponding to the target gray level.

[0076] in, Figure 7 The values ​​shown are examples and are not intended to be limiting.

[0077] exist Figure 12 In this diagram, the head and tail of each arrow represent two pixel units that can be compared in brightness. Since different pixel units are assigned different gray levels, the gray level difference between adjacent pixel units is obtained based on the gray level of each pixel unit. Then, the minimum gray level difference is determined from the gray level differences between adjacent pixel units. Finally, based on this minimum gray level difference, the two pixel units with the smallest brightness difference can be found.

[0078] The differences in brightness caused by positive and negative polarities, as well as the differences in adjusted grayscale levels, between adjacent pixel units create several boundaries, such as... Figure 13 The arrow shown crosses the boundary between two pixel units.

[0079] It is understandable that the grayscale of each pixel unit can be obtained from the corresponding frame grayscale data.

[0080] It should be noted that the above-mentioned boundary can be used to confirm whether there is distortion in the camera's photographs: such as Figure 13As shown, the grayscale difference between the grayscale compensation (-1) of the pixel unit shown in the second column of the first row and the grayscale compensation (+3) of the pixel unit shown in the third column can be considered equal to the grayscale difference between the grayscale compensation (-3) of the pixel unit shown in the second column of the third row and the grayscale compensation (+1) of the pixel unit shown in the third column.

[0081] The grayscale difference between the grayscale compensation (-2) of the pixel unit shown in the first column of the second row and the grayscale compensation (+0) of the pixel unit shown in the second column can be considered equal to the grayscale difference between the grayscale compensation (-0) of the pixel unit shown in the third column of the second row and the grayscale compensation (+2) of the pixel unit shown in the fourth column.

[0082] The grayscale difference between the grayscale compensation (-1) of the pixel unit shown in the first row of the second column and the grayscale compensation (+0) of the pixel unit shown in the second row can be considered equal to the grayscale difference between the grayscale compensation (+1) of the pixel unit shown in the third row of the third column and the grayscale compensation (-0) of the pixel unit shown in the second row.

[0083] The grayscale difference between the grayscale compensation (+3) of the pixel unit shown in the first row of the third column and the grayscale compensation (-0) of the pixel unit shown in the second row can be considered equal to the grayscale difference between the grayscale compensation (-3) of the pixel unit shown in the third row of the second column and the grayscale compensation (+0) of the pixel unit shown in the second row.

[0084] Theoretically, the edge gradient values ​​of two pixel units with equal grayscale differences are also equal, so the camera captures the image without distortion; otherwise, distortion occurs.

[0085] If at least one of the above grayscale differences exceeds the threshold, such as 1-2 grayscale levels, it indicates that there is distortion in the camera's image.

[0086] The grayscale difference refers to the grayscale compensation of the "+" pixel unit minus the grayscale compensation of the "-" pixel unit. For example, the grayscale difference between the grayscale compensation (-2) of the pixel unit shown in the first column of the second row and the grayscale compensation (+0) of the pixel unit shown in the second column is (+0)-(-2)=2; the grayscale difference between the grayscale compensation (-0) of the pixel unit shown in the third column of the second row and the grayscale compensation (+2) of the pixel unit shown in the fourth column is (+2)-(-0)=2.

[0087] like Figure 14 As shown, with Figure 15 The difference is that the double arrow has been changed to a single arrow. Figure 14The single arrow shown illustrates the process of obtaining the grayscale difference, which involves subtracting the grayscale compensation of the pixel unit containing the head of the single arrow from the grayscale compensation of the pixel unit containing the tail of the single arrow. This boundary can also be used to obtain the minimum grayscale difference by determining the minimum edge gradient value (indicating minimal brightness difference and minimal flicker value), and based on this minimum grayscale difference, to obtain the optimal correction value for the common voltage without requiring multiple iterations.

[0088] The edge gradient value can be either the gray level difference or the gray level difference.

[0089] For ease of calculation and explanation, Figure 15 The relationship curve in the middle is changed to Figure 11 The straight line shown is based on Figure 16 Figure 16 The gamma voltage difference can be determined as shown in formula (1-1):

[0090] deltagammaV=(V0-V6)*ΔV / 255 (1-1)

[0091] Where deltagammaV is the gamma voltage difference, V0 is the maximum value of the positive half-cycle gamma voltage, V6 is the minimum value of the positive half-cycle gamma voltage, and ΔV is the minimum grayscale difference.

[0092] Then, the correction value of the common voltage is determined to be half of the gamma voltage difference. This correction value is then superimposed on the initial common voltage to obtain the target common voltage. During the positive half-cycle, the target common voltage and the positive half-cycle gamma voltage are used to control the torsion of the liquid crystal, and during the negative half-cycle, the target common voltage and the negative half-cycle gamma voltage are used to control the torsion of the liquid crystal, thereby reducing the brightness difference between the positive and negative half-cycles and thus reducing the flicker value.

[0093] In one embodiment, this embodiment provides a liquid crystal display panel that performs the compensation method in at least one of the above embodiments.

[0094] It is understood that since the liquid crystal display panel provided in this embodiment performs the compensation method in at least one of the above embodiments, it can also improve the flickering phenomenon by first acquiring multiple consecutive and alternating odd-frame grayscale data and even-frame grayscale data, where two adjacent pixel units have opposite single polarities in one of the odd-frame grayscale data or even-frame grayscale data, and multiple pixel units display a black screen in the other of the odd-frame grayscale data or even-frame grayscale data, and then determining the minimum grayscale difference between adjacent pixel units based on one of the odd-frame grayscale data or even-frame grayscale data, and then determining the gamma voltage difference corresponding to the grayscale difference according to the relationship curve between grayscale and gamma voltage, and then obtaining the correction value of the common voltage based on the gamma voltage difference. The common voltage can be adjusted only once by the correction value to improve the flickering phenomenon, without the need for multiple iterations with low efficiency.

[0095] Furthermore, flicker can also be improved by using dynamic images of multiple consecutive and alternating odd-numbered and even-numbered grayscale data frames. Compared to flicker, which is usually adjusted under a fixed pattern, this expands the types of patterns required to adjust flicker.

[0096] Furthermore, multiple consecutive and alternating odd-frame and even-frame grayscale data can be obtained with a single camera shot. Based on the odd-frame and even-frame grayscale data, the corresponding grayscale difference can be identified as a basis for judging the magnitude of the flicker value. Compared with the existing method of measuring the flicker value through corresponding optical instruments, this reduces the frequency of using optical instruments and thus improves the efficiency of flicker adjustment.

[0097] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0098] The liquid crystal display panel and its compensation method provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A compensation method for a liquid crystal display panel, characterized in that, The liquid crystal display panel includes multiple pixel units arranged in an array, each pixel unit including multiple first sub-pixels and second sub-pixels that are alternately distributed in the row and column directions, and the compensation method includes: Acquire multiple consecutive and alternating odd-numbered frame grayscale data and even-numbered frame grayscale data; in either the odd-numbered frame grayscale data or the even-numbered frame grayscale data, set all first sub-pixels and all second sub-pixels of one pixel unit in two adjacent pixel units to be displayed with zero grayscale and non-zero grayscale respectively, and all first sub-pixels and all second sub-pixels of the other pixel unit to be displayed with non-zero grayscale and zero grayscale respectively; the multiple pixel units display a black screen in the other of the odd-numbered frame grayscale data or even-numbered frame grayscale data; The minimum gray level difference between adjacent pixel units is determined based on either the odd-numbered frame gray level data or the even-numbered frame gray level data. The gamma voltage difference corresponding to the gray level difference is determined based on the relationship curve between gray level and gamma voltage. The correction value of the common voltage is obtained based on the gamma voltage difference.

2. The compensation method according to claim 1, characterized in that, The multiple pixel units displaying a black screen in either the odd-numbered frame grayscale data or the even-numbered frame grayscale data includes: Set all first sub-pixels and all second sub-pixels in each pixel unit to be displayed with zero grayscale.

3. The compensation method according to claim 1, characterized in that, Each pixel unit includes multiple first sub-pixels and second sub-pixels that are distributed with alternating polarities in the row and column directions, including: Set the first and second sub-pixels to be alternately distributed in the row and column directions; Configure one of the first sub-pixels or the second sub-pixel to have a positive polarity, and the other of the first sub-pixels or the second sub-pixel to have a negative polarity.

4. The compensation method according to claim 1, characterized in that, The step of determining the minimum grayscale difference between adjacent pixel units based on either the odd-numbered frame grayscale data or the even-numbered frame grayscale data includes: The gray level of each pixel unit is obtained based on either the gray level data of the odd-numbered frames or the gray level data of the even-numbered frames. Based on the grayscale of each pixel unit, the grayscale difference between adjacent pixel units is obtained; The minimum gray level difference is determined from the gray level differences between adjacent pixel units.

5. The compensation method according to claim 1, characterized in that, The step of determining the gamma voltage difference corresponding to the gray level difference based on the relationship curve between gray level and gamma voltage includes: The gamma voltage is set to be divided into positive half-cycle gamma voltage and negative half-cycle gamma voltage; The common voltage is set to be greater than the negative half-cycle gamma voltage and less than the positive half-cycle gamma voltage; The gamma voltage difference is determined as shown in formula (1-1): deltagammaV=(V0-V6)*ΔV / 255(1-1) Where deltagammaV is the gamma voltage difference, V0 is the maximum value of the positive half-cycle gamma voltage, V6 is the minimum value of the positive half-cycle gamma voltage, and ΔV is the minimum grayscale difference.

6. The compensation method according to claim 5, characterized in that, The step of obtaining the correction value of the common voltage based on the gamma voltage difference includes: The correction value is determined to be half of the gamma voltage difference.

7. The compensation method according to claim 6, characterized in that, Following the step of obtaining the correction value of the common voltage based on the gamma voltage difference, the method further includes: The correction value is superimposed on the initial common voltage to obtain the target common voltage; The torsion of the liquid crystal is controlled based on the target common voltage, the positive half-cycle gamma voltage, and the negative half-cycle gamma voltage.

8. The compensation method according to any one of claims 1 to 7, characterized in that, Each pixel unit comprises at least nine sub-pixels arranged in an array, the at least nine sub-pixels having three different colors.

9. A liquid crystal display panel, characterized in that, The liquid crystal display panel performs the compensation method as described in any one of claims 1 to 8.

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