A brightness compensation method, brightness compensation device and display device of a display panel

Abstract

The embodiment of the present application discloses a display panel brightness compensation method, a display panel brightness compensation device and a display device. The display panel brightness compensation method comprises the following steps: obtaining initial brightness data of at least one sub-pixel under a preset gray scale of a display panel; calculating a correction gamma value according to a standard gamma value and a preset adjustment gamma value; calculating correction brightness data of the sub-pixel under the preset gray scale of the display panel according to the initial brightness data and the correction gamma value; and performing brightness compensation of the display panel according to the correction brightness data. The technical scheme provided by the embodiment improves the compensation effect of the display panel and solves the problem of poor brightness compensation effect of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a brightness compensation method, a brightness compensation device, and a display device for a display panel. Background Technology

[0002] With the development of display technology, people have increasingly higher requirements for display panels. Existing brightness compensation methods for display panels require adjusting the driving voltage of the display panel. However, due to the small adjustment range of the driving voltage, the Mura compensation effect of the display panel is not good, which affects the brightness compensation effect of the display panel. Summary of the Invention

[0003] This invention provides a brightness compensation method, a brightness compensation device, and a display device for a display panel, in order to solve the problem of poor brightness compensation effect of the display panel.

[0004] To address the aforementioned technical problems, the present invention adopts the following technical solution:

[0005] According to one aspect of the present invention, an embodiment of the present invention provides a brightness compensation method for a display panel, comprising:

[0006] Obtain the initial brightness data of at least one sub-pixel under the preset grayscale of the display panel;

[0007] Calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value;

[0008] Based on the initial brightness data and the corrected gamma value, calculate the corrected brightness data of the sub-pixel at the preset grayscale of the display panel;

[0009] Based on the corrected brightness data, brightness compensation is performed on the display panel.

[0010] Optionally, obtaining the initial brightness data of at least one sub-pixel at a preset grayscale of the display panel includes:

[0011] Obtain the initial brightness data of each sub-pixel of a certain luminous color at a preset grayscale level of the display panel; or,

[0012] Obtain the initial brightness data of each sub-pixel of the two luminous colors at a preset grayscale of the display panel; or,

[0013] Obtain the initial brightness data of each sub-pixel of the three luminous colors under the preset grayscale of the display panel.

[0014] Optionally, the corrected gamma value includes a first corrected gamma value and / or a second corrected gamma value; the step of calculating the corrected gamma value based on the standard gamma value and the preset adjusted gamma value includes:

[0015] A first corrected gamma value is calculated based on the difference between the standard gamma value and the preset adjusted gamma value; wherein, the first corrected gamma value is used to enhance the degree of brightness compensation for the sub-pixel; and / or,

[0016] A second corrected gamma value is calculated based on the sum of the standard gamma value and the preset adjusted gamma value; wherein, the second corrected gamma value is used to reduce the degree of compensation for the brightness of the sub-pixel.

[0017] Optionally, the preset gamma value is determined by the following method:

[0018] Input a first power supply voltage to the display panel and calculate the first gamma value of at least one of the sub-pixels of the display panel;

[0019] A second power supply voltage is input to the display panel, and a second gamma value of at least one of the sub-pixels of the display panel is calculated; wherein the first power supply voltage is less than the second power supply voltage;

[0020] The preset adjustment gamma value is determined based on the first gamma value and the second gamma value;

[0021] Preferably, the second power supply voltage is equal to 5V.

[0022] Optionally, inputting a first power supply voltage to the display panel and calculating the first gamma value of at least one of the sub-pixels of the display panel includes:

[0023] Input a first power supply voltage to the display panel, and calculate the first sub-gamma value of each sub-pixel of at least one luminous color of the display panel;

[0024] The first gamma value is determined based on the average of the first sub-gamma values ​​of each of the sub-pixels.

[0025] Optionally, inputting a second power supply voltage to the display panel and calculating the second gamma value of at least one of the sub-pixels of the display panel includes:

[0026] Input a second power supply voltage to the display panel, and calculate the second sub-gamma value of each sub-pixel of at least one luminous color of the display panel;

[0027] The second gamma value is determined based on the average of the second sub-gamma values ​​of each of the sub-pixels.

[0028] Optionally, determining the preset adjustment gamma value based on the first gamma value and the second gamma value includes:

[0029] A sub-corrected gamma value is determined based on the difference between the first gamma value and the second gamma value; wherein the emission color of the sub-pixels corresponding to the first gamma value and the second gamma value is the same;

[0030] The sub-corrected gamma value is used as the preset adjusted gamma value; or, the preset adjusted gamma value is determined based on the average of the sub-corrected gamma values ​​corresponding to the sub-pixels of at least two luminous colors.

[0031] Optionally, calculating the corrected brightness data of the sub-pixel at a preset grayscale of the display panel based on the initial brightness data and the corrected gamma value includes:

[0032] Calculate the average brightness data of each sub-pixel based on the initial brightness data of each sub-pixel;

[0033] The compensation gray level corresponding to each sub-pixel is calculated based on the initial brightness data, the average brightness data, and the corrected gamma value of each sub-pixel.

[0034] The corrected brightness data of the sub-pixel is calculated based on the compensated gray level, the relative brightness value of the 255 gray level, and the corrected gamma value.

[0035] Optionally, the compensation grayscale corresponding to each sub-pixel is calculated based on the initial brightness data, the average brightness data, and the corrected gamma value, using the following formula:

[0036] N x =N*(L n / L aver ) (1 / Gamma) (1)

[0037] Where Gamma is the corrected gamma value, N x The compensation gray level is the gray level corresponding to the sub-pixel, where N is the preset gray level and L is the gray level. n L is the initial brightness data of the sub-pixel. aver The average brightness data for each of the sub-pixels.

[0038] Optionally, the corrected brightness data of the sub-pixel is calculated based on the compensated grayscale, the relative brightness value of the 255 grayscale, and the corrected gamma value, using the following formula:

[0039] L n1 =(N x / 255) Gamma *L 255 (2)

[0040] Among them, L n1Here, N represents the corrected brightness data for the sub-pixel, Gamma is the corrected gamma value, and N represents the corrected gamma value. x L is the compensation gray level corresponding to the sub-pixel. 255 This represents the relative brightness value at a grayscale level of 255.

[0041] According to another aspect of the present invention, the present invention provides a brightness compensation device for a display panel, comprising:

[0042] The brightness acquisition module is used to acquire the initial brightness data of at least one sub-pixel under the preset grayscale of the display panel;

[0043] The first calculation module is used to calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value.

[0044] The second calculation module is used to calculate the corrected brightness data of the sub-pixels under the preset grayscale of the display panel based on the initial brightness data and the corrected gamma value.

[0045] The compensation module is used to perform brightness compensation on the display panel based on the corrected brightness data.

[0046] According to another aspect of the present invention, an embodiment of the present invention provides a display device including a brightness compensation device for a display panel as described in the second aspect, wherein the brightness compensation device for the display panel is used to perform the brightness compensation method for the display panel as described in any one of the first aspects.

[0047] The brightness compensation method for a display panel provided in this invention obtains the initial brightness data of at least one sub-pixel at a preset grayscale of the display panel, and calculates a corrected gamma value based on a standard gamma value and a preset adjusted gamma value. Then, based on the initial brightness data and the corrected gamma value, it calculates corrected brightness data at the preset grayscale of the display panel, thereby performing brightness compensation for the display panel based on the corrected brightness data. Since the corrected brightness data effectively amplifies the difference between the bright and dark states of the display panel, this setting allows for more precise compensation of the display panel based on the corrected brightness data, thus significantly improving the display effect. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0049] Figure 1 This is a flowchart of a brightness compensation method for a display panel provided in an embodiment of the present invention;

[0050] Figure 2 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention;

[0051] Figure 3 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention;

[0052] Figure 4 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention;

[0053] Figure 5 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention;

[0054] Figure 6 This is a flowchart of a method for determining a preset gamma value according to an embodiment of the present invention;

[0055] Figure 7 This is a flowchart of another preset adjustment gamma value determination method provided by an embodiment of the present invention;

[0056] Figure 8 This is a flowchart of another method for determining a preset gamma value provided by an embodiment of the present invention;

[0057] Figure 9 This is a flowchart of another method for determining a preset gamma value provided by an embodiment of the present invention;

[0058] Figure 10 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention;

[0059] Figure 11 This is a schematic diagram of the structure of a brightness compensation device for a display panel provided in an embodiment of the present invention;

[0060] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0061] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0062] As mentioned in the background section, existing brightness compensation methods for display panels require adjusting the driving voltage of the display panel. Because the adjustment range of the driving voltage is relatively small, the demura effect of the display panel is poor, affecting the brightness compensation effect. The inventors discovered that a higher driving voltage results in better brightness compensation. However, the limited adjustable range of the driving voltage restricts the demura compensation effect.

[0063] Based on the above-mentioned technical problems, this application proposes the following solutions:

[0064] Figure 1 This is a flowchart of a brightness compensation method for a display panel provided in an embodiment of the present invention. See also... Figure 1 The brightness compensation method for a display panel provided in this embodiment of the invention includes:

[0065] S101. Obtain the initial brightness data of at least one sub-pixel under the preset grayscale of the display panel.

[0066] Specifically, the initial brightness data of a subpixel is the brightness data when that subpixel is lit. Grayscale refers to the degree of brightness. Preset grayscale can be set as needed, and can include, for example, 32 grayscale, 64 grayscale, 255 grayscale, etc. The initial brightness data of at least one subpixel at the preset grayscale can be obtained through a brightness acquisition module, which can effectively obtain the initial brightness data of at least one subpixel when the display panel is emitting light. The brightness acquisition module includes a luminance meter or CCD camera, etc.

[0067] S102. Calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value.

[0068] Specifically, the standard gamma value can be a constant gamma value between gray levels, such as 2.2. The preset adjustment gamma value is the magnitude by which the gamma value needs to be adjusted. The preset adjustment gamma value can be determined based on empirical values ​​or through experimental calculations. The range of the preset adjustment gamma value includes 0.01-0.2, preferably 0.01-0.06. For example, the preset adjustment gamma value can be set to 0.04.

[0069] The corrected gamma value is calculated based on the difference or sum of the standard gamma value and the preset adjusted gamma value. The standard gamma value is then corrected using the preset adjusted gamma value to obtain the corrected gamma value. The corrected gamma value is used to adjust the brightness compensation level of each sub-pixel. For example, when the display panel brightness is insufficient, the corrected gamma value is used to enhance the brightness compensation level of the display panel. When the display panel brightness is excessively high, the corrected gamma value is used to reduce the brightness compensation level of the display panel. This setting can effectively improve the brightness compensation effect of the display panel, thereby improving the display effect.

[0070] S103. Based on the initial brightness data and the corrected gamma value, calculate the corrected brightness data of the sub-pixel at the preset grayscale of the display panel.

[0071] Specifically, based on the initial luminance data and corrected gamma value of at least one sub-pixel at a preset grayscale, and based on the correspondence between luminance and gamma values, the corrected luminance data of the sub-pixel at the preset grayscale is calculated. The corrected luminance data is the corrected luminance data of the sub-pixel at the preset grayscale. The corrected luminance data can characterize the luminance trend of the initial luminance data of the sub-pixel of the display panel, and the corrected luminance data of the sub-pixel is greater than the initial luminance data of that sub-pixel. This setting allows the luminance of the sub-pixel of the display panel corresponding to the corrected luminance data to be higher, thereby better reflecting the difference between the bright and dark states of the display panel, and thus amplifying the luminance difference between the bright and dark states of the display panel. This setting facilitates compensation for Mura unevenness of the display panel, thereby improving the compensation effect of the display panel and enhancing its display performance.

[0072] S104. Perform brightness compensation on the display panel based on the corrected brightness data.

[0073] Specifically, brightness compensation includes Mura compensation. Because corrected brightness data significantly amplifies the difference between the bright and dark states of the display panel, Mura defects become more pronounced. Based on the corrected brightness data, the presence of Mura on the display panel can be more accurately determined, allowing for more precise Mura compensation and improving the overall compensation effect.

[0074] The brightness compensation method for a display panel provided in this embodiment obtains the initial brightness data of at least one sub-pixel at a preset grayscale of the display panel, and calculates a corrected gamma value based on a standard gamma value and a preset adjusted gamma value. Then, based on the initial brightness data and the corrected gamma value, it calculates the corrected brightness data of the sub-pixel at the preset grayscale of the display panel, thereby performing brightness compensation for the display panel based on the corrected brightness data. Since the corrected brightness data effectively amplifies the difference between the bright and dark states of the display panel, this setting allows for more precise compensation of the display panel based on the corrected brightness data, thus significantly improving the display effect.

[0075] Figure 2 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention. Based on the above embodiment, see... Figure 2 The brightness compensation method for a display panel provided in this embodiment of the invention includes:

[0076] S201. Obtain the initial brightness data of each sub-pixel of a certain luminous color under the preset grayscale of the display panel.

[0077] Specifically, it can drive each sub-pixel of a single luminous color on the display panel to display. The initial brightness data of each sub-pixel of a single luminous color is acquired through a brightness acquisition module. This allows for the acquisition of the initial brightness data of each sub-pixel of a single luminous color. The brightness acquisition module may include a camera or similar device.

[0078] S202. Calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value.

[0079] S203. Based on the initial brightness data and the corrected gamma value, calculate the corrected brightness data of each sub-pixel of the luminous color under the preset grayscale of the display panel.

[0080] Specifically, the corrected brightness data of each sub-pixel of the same luminous color can be calculated based on the initial brightness data and corrected gamma value of each sub-pixel of the same luminous color under the preset grayscale of the display panel.

[0081] S204. Perform brightness compensation on the display panel based on the corrected brightness data.

[0082] Specifically, brightness compensation includes Mura compensation. Based on the corrected brightness data of each sub-pixel of a single emitting color, the display Mura of the sub-pixels of that emitting color on the display panel is compensated. This setting allows for better compensation of each sub-pixel of a single emitting color, improving the display panel's overall performance. Alternatively, based on the corrected brightness data of each sub-pixel of a single emitting color, the display Mura of each sub-pixel of various emitting colors on the display panel is compensated. This setting allows the display panel to compensate for the display Mura of each sub-pixel of various emitting colors based on the corrected brightness data of each sub-pixel of a single emitting color, reducing the data processing load on the driver chip, improving the efficiency of brightness compensation, and further enhancing the display panel's overall performance.

[0083] Figure 3 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention. Based on the above embodiments, see... Figure 3 The brightness compensation method for a display panel provided in this embodiment of the invention includes:

[0084] S301. Obtain the initial brightness data of each sub-pixel of the two luminous colors under the preset grayscale of the display panel.

[0085] Specifically, it can drive each sub-pixel of the two emitting colors on the display panel to display separately, for example, green and blue. The initial brightness data of each sub-pixel of the two emitting colors is acquired through a brightness acquisition module. This allows for the acquisition of the initial brightness data of each sub-pixel of the two emitting colors at a preset grayscale level on the display panel.

[0086] S302. Calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value.

[0087] S303. Based on the initial brightness data and the corrected gamma value, calculate the corrected brightness data of each sub-pixel of the two luminous colors under the preset grayscale of the display panel.

[0088] Specifically, the corrected brightness data of each sub-pixel of the two emitting colors under the preset grayscale of the display panel can be calculated based on the initial brightness data and corrected gamma value of each sub-pixel of the two emitting colors under the preset grayscale of the display panel.

[0089] S304. Perform brightness compensation on the display panel based on the corrected brightness data.

[0090] Specifically, brightness compensation includes Mura compensation. Based on the corrected brightness data of each sub-pixel of the two colors under the preset grayscale of the display panel, Mura compensation is performed on each sub-pixel of the two emitting colors of the display panel, which improves the compensation accuracy of the display panel and further enhances the Mura compensation effect of the display panel.

[0091] Another alternative implementation method is to compensate each sub-pixel of each emission color of the display panel based on the average value of the corrected brightness data of each sub-pixel of the two emission colors, thereby improving the Mura compensation accuracy of the display panel and further improving the Mura compensation effect of the display panel.

[0092] On the other hand, by compensating each sub-pixel of the display panel based on the corrected brightness data of each sub-pixel of the two luminous colors, the Mura compensation effect of the display panel can be improved, and the amount of computational data of the display panel's computing unit can be reduced, further improving the Mura compensation effect of the display panel.

[0093] Figure 4 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention. Based on the above embodiments, see... Figure 4 The brightness compensation method for a display panel provided in this embodiment of the invention includes:

[0094] S401. Obtain the initial brightness data of each sub-pixel of the three luminous colors under the preset grayscale of the display panel.

[0095] Specifically, it can drive each sub-pixel of the three emitting colors on the display panel to display separately, such as red, green, and blue. Alternatively, it can drive the display panel to display a white screen, and use a brightness acquisition module to acquire the initial brightness data of each sub-pixel of the three emitting colors. By obtaining the initial brightness data of each sub-pixel of the three emitting colors, it is possible to acquire the initial brightness data of each sub-pixel of the three emitting colors at a preset grayscale on the display panel.

[0096] S402. Calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value.

[0097] S403. Based on the initial brightness data and the corrected gamma value, calculate the corrected brightness data of each sub-pixel of the three luminous colors under the preset grayscale of the display panel.

[0098] Specifically, the initial brightness data of each sub-pixel of the three luminous colors under the preset grayscale of the display panel is subtracted or summed with the corrected gamma value to calculate the corrected brightness data of each sub-pixel of the three luminous colors under the preset grayscale of the display panel.

[0099] S404. Perform brightness compensation on the display panel based on the corrected brightness data.

[0100] Specifically, brightness compensation includes Mura compensation. Based on the corrected brightness data of each sub-pixel for the three luminous colors at the preset grayscale of the display panel, Mura compensation is performed on each sub-pixel of the display panel. This setting ensures that each sub-pixel of different luminous colors of the display panel uses corrected brightness data matching its luminous color for Mura compensation, resulting in better Mura compensation effects for all sub-pixels of the display panel and further improving the overall Mura compensation effect of the display panel.

[0101] Figure 5 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention. Based on the above embodiments, see... Figure 5 The brightness compensation method for a display panel provided in this embodiment of the invention includes:

[0102] S501. Obtain the initial brightness data of at least one sub-pixel under the preset grayscale of the display panel.

[0103] S502. Calculate a corrected gamma value based on the standard gamma value and the preset adjusted gamma value. The corrected gamma value includes a first corrected gamma value and / or a second corrected gamma value. The first gamma value is the difference between the standard gamma value and the preset adjusted gamma value. The first corrected gamma value is used to enhance the degree of brightness compensation for the sub-pixel. The second corrected gamma value is the sum of the standard gamma value and the preset adjusted gamma value. The second corrected gamma value is used to reduce the degree of brightness compensation for the sub-pixel.

[0104] Specifically, the first corrected gamma value is determined by the difference between the standard gamma value and the preset adjusted gamma value. When the brightness compensation of the display panel is insufficient, i.e., the brightness of the display panel is too dim, the first corrected gamma value is used to compensate for the brightness of the display panel, which can enhance the degree of brightness compensation for sub-pixels. This setting, using the first corrected gamma value for brightness compensation, can effectively compensate for insufficient brightness of the display panel, significantly increasing the brightness of the display panel and improving its display effect.

[0105] In one optional implementation, the second corrected gamma value is determined by the sum of the standard gamma value and the preset adjusted gamma value. When the brightness of the display panel is overcompensated, i.e., the brightness of the display panel is too bright, compensation can be made to the display panel according to the second corrected gamma value, which can reduce the degree of compensation for the brightness of sub-pixels. This setting, by compensating the display panel with the second corrected gamma value, can effectively reduce the brightness of the display panel, effectively preventing excessive brightness and improving the display effect.

[0106] S503. Based on the initial brightness data and the corrected gamma value, calculate the corrected brightness data of the sub-pixel at the preset grayscale of the display panel.

[0107] S504. Perform brightness compensation on the display panel based on the corrected brightness data.

[0108] Specifically, brightness compensation includes Mura compensation.

[0109] Figure 6 This is a flowchart of a method for determining a preset adjusted gamma value provided by an embodiment of the present invention. Based on the above embodiment, see [link to related documentation]. Figure 6 The preset adjustment gamma value of the brightness compensation method for the display panel provided in this embodiment of the invention is determined by the following method:

[0110] S601. Input a first power supply voltage to the display panel and calculate the first gamma value of at least one sub-pixel of the display panel.

[0111] Specifically, the first power supply voltage is a DC voltage, for example, 4.6V. The first power supply voltage is input to the display panel, driving the display panel to emit light. When the first power supply voltage drives the display panel to emit light, the initial brightness data of each sub-pixel of different colors (R / G / B) is acquired through the brightness acquisition module. Based on the brightness-grayscale variation curve, and according to the initial brightness data, the first gamma value of each sub-pixel is calculated when the first power supply voltage drives the display panel to emit light.

[0112] S602. Input a second power supply voltage to the display panel and calculate the second gamma value of at least one sub-pixel of the display panel, wherein the first power supply voltage is less than the second power supply voltage. Optionally, the second power supply voltage is equal to 5V.

[0113] Specifically, the second power supply voltage is a DC voltage, such as 5V. This second power supply voltage is input to the display panel, driving it to emit light. While the display panel is emitting light, the initial brightness data (R / G / B) of each sub-pixel of different colors is acquired by the brightness acquisition module. Based on the brightness-grayscale variation curve, and according to the initial brightness data, the second gamma value of each sub-pixel is calculated when the display panel is emitting light using the second power supply voltage.

[0114] S603. Determine a preset adjustment gamma value based on the first gamma value and the second gamma value.

[0115] Specifically, based on the first gamma value obtained when the display panel emits light using the first power supply voltage and the second gamma value obtained when the display panel emits light using the second power supply voltage, the deviation of the first gamma value from the second gamma value is calculated, which is the preset adjustment gamma value. The preset adjustment gamma value can be understood as the difference between the first and second gamma values. The preset adjustment gamma value can include the preset adjustment gamma values ​​corresponding to the red sub-pixels, the green sub-pixels, and the blue sub-pixels. The second power supply voltage can be set to 5V.

[0116] Figure 7 This is a flowchart of another method for determining a preset adjusted gamma value provided by an embodiment of the present invention. Based on the above embodiment, see... Figure 7 The preset adjustment gamma value of the brightness compensation method for the display panel provided in this embodiment of the invention is determined by the following method:

[0117] S701. Input a first power supply voltage to the display panel and calculate the first sub-gamma value of each sub-pixel of at least one luminous color.

[0118] Specifically, a first power supply voltage is input to the display panel to drive it to emit light. This first power supply voltage can be set to be lower than 5V. Initial brightness data for each sub-pixel of at least one emitting color is acquired via a brightness acquisition module. Based on the brightness-grayscale variation curve, and according to the initial brightness data, the first sub-gamma value for each sub-pixel of at least one emitting color is calculated.

[0119] S702. Determine the first gamma value based on the average of the first sub-gamma values ​​of each sub-pixel.

[0120] Specifically, the first sub-gamma value of each sub-pixel is averaged to obtain the first gamma value of each sub-pixel for at least one emitting color. For example, a first power supply voltage is input to the display panel. The first sub-gamma value of each red sub-pixel is averaged to obtain the first gamma value of the red sub-pixel. The first sub-gamma value of each green sub-pixel is averaged to obtain the first gamma value of the green sub-pixel. The first sub-gamma value of each blue sub-pixel is averaged to obtain the first gamma value of the blue sub-pixel.

[0121] S703. Input a second power supply voltage to the display panel and calculate the second gamma value of at least one of the sub-pixels of the display panel, wherein the first power supply voltage is less than the second power supply voltage.

[0122] S704. Determine a preset adjustment gamma value based on the first gamma value and the second gamma value.

[0123] Figure 8 This is a flowchart of another method for determining a preset adjusted gamma value provided by an embodiment of the present invention. Based on the above embodiments, see [link to related documentation]. Figure 8 The preset adjustment gamma value of the brightness compensation method for the display panel provided in this embodiment of the invention is determined by the following method:

[0124] S801. Input a first power supply voltage to the display panel and calculate the first gamma value of each sub-pixel of at least one luminous color of the display panel.

[0125] S802, Input a second power supply voltage to the display panel, and calculate the second sub-gamma value of each sub-pixel of at least one luminous color of the display panel.

[0126] Specifically, a second power supply voltage is input to the display panel to drive it to emit light. Initial brightness data of each sub-pixel of at least one emitted color is acquired via a brightness acquisition module. Based on the brightness-grayscale variation curve, and according to the initial brightness data of each sub-pixel of at least one emitted color, a second sub-gamma value of each sub-pixel of at least one emitted color is calculated.

[0127] S803. Determine the second gamma value based on the average of the second sub-gamma values ​​of each of the sub-pixels.

[0128] Specifically, the second gamma value is calculated by averaging the second sub-gamma values ​​of all sub-pixels of the same emission color. This setting ensures that the second gamma value can represent the average gamma value of all sub-pixels of the same emission color.

[0129] S804. Determine a preset adjustment gamma value based on the first gamma value and the second gamma value.

[0130] Specifically, the first gamma value is the average gamma value of each sub-pixel when the display panel is driven by the first power supply voltage. The second gamma value is the average gamma value of each sub-pixel when the display panel is driven by the second power supply voltage. Based on the first and second gamma values, a preset adjustment gamma value is determined, such that the preset adjustment gamma value characterizes the difference between the luminous brightness of the display panel under the first power supply voltage and the luminous brightness under the second power supply voltage. This setting allows the brightness compensation effect of the display panel based on the preset adjustment gamma value to be closer to the compensation effect when the display panel is driven by the second power supply voltage, further improving the display panel's display effect.

[0131] Figure 9 This is a flowchart of another method for determining a preset adjusted gamma value provided by an embodiment of the present invention. Based on the above embodiments, see [link to related documentation]. Figure 9 The preset adjustment gamma value of the brightness compensation method for the display panel provided in this embodiment of the invention is determined by the following method:

[0132] S901. Input a first power supply voltage to the display panel and calculate the first gamma value of at least one sub-pixel of the display panel.

[0133] S902. Input a second power supply voltage to the display panel and calculate the second gamma value of at least one of the sub-pixels of the display panel, wherein the first power supply voltage is less than the second power supply voltage.

[0134] S903. Determine a sub-corrected gamma value based on the difference between the first gamma value and the second gamma value, wherein the emission color of the sub-pixels corresponding to the first gamma value and the second gamma value is the same.

[0135] Specifically, the sub-corrected gamma value is obtained by subtracting the first gamma value corresponding to a sub-pixel of a certain luminous color from the second gamma value corresponding to that luminous color. The sub-corrected gamma value is the deviation between the gamma value corresponding to the luminous brightness of the display panel under the first power supply voltage and the gamma value corresponding to the luminous brightness under the second power supply voltage.

[0136] S904. Use the sub-corrected gamma value as the preset adjustment gamma value; or, determine the preset adjustment gamma value based on the average of the sub-corrected gamma values ​​corresponding to the sub-pixels of at least two luminous colors.

[0137] Specifically, the sub-correction gamma value corresponding to each sub-pixel of a certain emission color is expanded into the sub-correction gamma value corresponding to each sub-pixel of various emission colors, and the sub-correction gamma value of each sub-pixel of that emission color is used as the preset adjustment gamma value.

[0138] Another optional implementation method is to take the average of the sub-correction gamma values ​​corresponding to each sub-pixel of at least two emission colors, and use the average of the sub-correction gamma values ​​corresponding to each sub-pixel of at least two emission colors as the preset adjustment gamma value.

[0139] This setting ensures that the preset gamma value adjustment is more accurate in adjusting the brightness of sub-pixels of various luminous colors, further improving the adjustment accuracy of the preset gamma value and enhancing the display effect of the display panel.

[0140] Figure 10 This is a flowchart of another brightness compensation method for a display panel provided in an embodiment of the present invention. Based on the above embodiments, see... Figure 10 The brightness compensation method for a display panel provided in this embodiment of the invention includes:

[0141] S1001. Obtain the initial brightness data of at least two sub-pixels under the preset grayscale of the display panel.

[0142] S1002. Calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value.

[0143] S1003. Calculate the average brightness data of each sub-pixel based on the initial brightness data of each sub-pixel.

[0144] Specifically, the initial brightness data of each sub-pixel is averaged to obtain the average brightness data of each sub-pixel. This setting makes the compensation effect more uniform for each sub-pixel, further improving the compensation effect for each sub-pixel. On the other hand, compensating based on the average brightness data of each sub-pixel can reduce the amount of data that the compensation module needs to process, thereby improving the compensation efficiency of the display panel.

[0145] S1004. Calculate the compensation grayscale corresponding to each sub-pixel based on the initial brightness data, the average brightness data, and the corrected gamma value of each sub-pixel.

[0146] Specifically, based on the relationship between the initial brightness data, average brightness data, and corrected gamma value of each sub-pixel, the corrected gamma value can be converted into the compensation gray level corresponding to each sub-pixel. That is, the compensation gray level corresponding to each sub-pixel can be calculated, which makes it easier to determine the corrected brightness data corresponding to each sub-pixel.

[0147] In one optional implementation, the compensated grayscale of each sub-pixel is calculated based on the initial brightness data, the average brightness data, and the corrected gamma value, using the following formula:

[0148] N x =N*(L n / L aver ) (1 / Gamma) (1)

[0149] Where Gamma is the corrected gamma value, N x The compensation gray level is the gray level corresponding to the sub-pixel, where N is the preset gray level and L is the gray level. n L is the initial brightness data of the sub-pixel. aver The average brightness data for each of the sub-pixels.

[0150] S1005. Calculate the corrected brightness data of the sub-pixel based on the compensated gray level, the relative brightness value of the 255 gray level, and the corrected gamma value.

[0151] Specifically, the corrected brightness data for each sub-pixel can be determined based on the compensated gray level, the relative brightness value of the 255 gray level, and the corrected gamma value.

[0152] In one optional implementation, the corrected brightness data of the sub-pixel is calculated based on the compensated grayscale, the relative brightness value of the 255 grayscale, and the corrected gamma value, using the following formula:

[0153] L n1 =(N x / 255) Gamma *L 255 (2)

[0154] Among them, L n1 N is the corrected brightness data for the sub-pixel. x The compensation gray level is the sub-pixel's corresponding gray level, Gamma is the corrected gamma value, and L... 255 This represents the relative brightness value at a grayscale level of 255.

[0155] S1006. Perform brightness compensation on the display panel based on the corrected brightness data.

[0156] Specifically, brightness compensation includes Mura compensation.

[0157] Figure 11This is a schematic diagram of the structure of a brightness compensation device for a display panel provided in an embodiment of the present invention. Based on the above embodiment, see... Figure 11 The brightness compensation device 10 for a display panel provided in this embodiment of the invention includes:

[0158] The brightness acquisition module 11 is used to acquire the initial brightness data of at least one sub-pixel under the preset grayscale of the display panel;

[0159] The first calculation module 12 is used to calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value.

[0160] The second calculation module 13 is used to calculate the corrected brightness data of the sub-pixels under the preset grayscale of the display panel based on the initial brightness data and the corrected gamma value.

[0161] The compensation module 14 is used to perform brightness compensation of the display panel based on the corrected brightness data.

[0162] Specifically, brightness compensation includes Mura compensation.

[0163] The brightness compensation device for a display panel provided in this embodiment of the invention acquires initial brightness data of at least one sub-pixel at a preset grayscale of the display panel through a brightness acquisition module, and calculates a corrected gamma value based on a standard gamma value and a preset adjusted gamma value. Based on the initial brightness data and the corrected gamma value, the corrected brightness data of the sub-pixel at the preset grayscale of the display panel is calculated, thereby performing brightness compensation of the display panel according to the corrected brightness data. This configuration allows for compensation of the display panel based on the corrected brightness data, effectively improving the display effect of the display panel.

[0164] Figure 12 This is a schematic diagram of a display device provided in an embodiment of the present invention. Based on the above embodiment, see... Figure 12 The display device 20 provided in this embodiment includes a brightness compensation device 10 for the display panel as proposed in any of the above embodiments. This brightness compensation device 10 is used to execute the brightness compensation method for the display panel as proposed in any of the above embodiments, and has the beneficial effects of the brightness compensation method for the display panel as proposed in any of the above embodiments, which will not be elaborated further here. The display device 20 provided in this embodiment includes terminal devices such as mobile phones, tablet computers, and wearable devices.

[0165] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A brightness compensation method for a display panel, characterized in that, include: Obtain the initial brightness data of at least one sub-pixel under the preset grayscale of the display panel; Calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value; The preset adjustment gamma value is determined by the following method: inputting a first power supply voltage to the display panel, calculating a first gamma value of at least one of the sub-pixels of the display panel; inputting a second power supply voltage to the display panel, calculating a second gamma value of at least one of the sub-pixels of the display panel, wherein the first power supply voltage is less than the second power supply voltage; determining the preset adjustment gamma value based on the first gamma value and the second gamma value; the preset adjustment gamma value is the magnitude of the deviation of the first gamma value from the second gamma value; the standard gamma value is a constant of gamma values ​​between gray levels; Based on the initial brightness data and the corrected gamma value, calculate the corrected brightness data of the sub-pixel at the preset grayscale of the display panel; Based on the corrected brightness data, brightness compensation is performed on the display panel.

2. The method according to claim 1, characterized in that, The step of obtaining the initial brightness data of at least one sub-pixel at a preset grayscale of the display panel includes: Obtain the initial brightness data of each sub-pixel of a certain luminous color at a preset grayscale level of the display panel; or, Obtain the initial brightness data of each sub-pixel of the two luminous colors at a preset grayscale of the display panel; or, Obtain the initial brightness data of each sub-pixel of the three luminous colors under the preset grayscale of the display panel.

3. The method according to claim 1, characterized in that, The corrected gamma value includes a first corrected gamma value and / or a second corrected gamma value; the calculation of the corrected gamma value based on the standard gamma value and the preset adjusted gamma value includes: The first corrected gamma value is calculated based on the difference between the standard gamma value and the preset adjusted gamma value, wherein the first corrected gamma value is used to enhance the degree of brightness compensation for the sub-pixel; and / or, The second corrected gamma value is calculated based on the sum of the standard gamma value and the preset adjusted gamma value, wherein the second corrected gamma value is used to reduce the degree of compensation for the brightness of the sub-pixel.

4. The method according to claim 1, characterized in that, The second power supply voltage is 5V.

5. The method according to claim 4, characterized in that, The step of inputting a first power supply voltage to the display panel and calculating the first gamma value of at least one of the sub-pixels of the display panel includes: Input the first power supply voltage to the display panel, and calculate the first sub-gamma value of each sub-pixel of at least one luminous color of the display panel; The first gamma value is determined based on the average of the first sub-gamma values ​​of each of the sub-pixels.

6. The method according to claim 5, characterized in that, The step of inputting a second power supply voltage to the display panel and calculating the second gamma value of at least one of the sub-pixels of the display panel includes: Input the second power supply voltage to the display panel, and calculate the second sub-gamma value of each sub-pixel of at least one luminous color of the display panel; The second gamma value is determined based on the average of the second sub-gamma values ​​of each of the sub-pixels.

7. The method according to claim 6, characterized in that, Determining the preset adjustment gamma value based on the first gamma value and the second gamma value includes: A sub-corrected gamma value is determined based on the difference between the first gamma value and the second gamma value, wherein the emission color of the sub-pixels corresponding to the first gamma value and the second gamma value is the same; The sub-corrected gamma value is used as the preset adjusted gamma value; or, the preset adjusted gamma value is determined based on the average of the sub-corrected gamma values ​​corresponding to the sub-pixels of at least two luminous colors.

8. The method according to claim 3, characterized in that, The step of calculating the corrected brightness data of the sub-pixels at a preset grayscale of the display panel based on the initial brightness data and the corrected gamma value includes: Calculate the average brightness data of each sub-pixel based on the initial brightness data of each sub-pixel; The compensation gray level corresponding to each sub-pixel is calculated based on the initial brightness data, the average brightness data, and the corrected gamma value of each sub-pixel. The corrected brightness data of the sub-pixel is calculated based on the compensated gray level, the relative brightness value of the 255 gray level, and the corrected gamma value.

9. The method according to claim 8, characterized in that, The compensation grayscale corresponding to each sub-pixel is calculated based on the initial brightness data, the average brightness data, and the corrected gamma value, using the following formula: （1） Where Gamma is the corrected gamma value, N x The compensation gray level is the gray level corresponding to the sub-pixel, where N is the preset gray level and L is the gray level. n L is the initial brightness data of the sub-pixel. aver The average brightness data for each of the sub-pixels.

10. The method according to claim 9, characterized in that, The corrected brightness data of the sub-pixel is calculated based on the compensated gray level, the relative brightness value of the 255 gray level, and the corrected gamma value, using the following formula: （2） Among them, L n1 Here, N represents the corrected brightness data for the sub-pixel, Gamma is the corrected gamma value, and N represents the corrected gamma value. x L is the compensation gray level corresponding to the sub-pixel. 255 This represents the relative brightness value at a grayscale level of 255.

11. A brightness compensation device for a display panel, characterized in that, include: The brightness acquisition module is used to acquire the initial brightness data of at least one sub-pixel under the preset grayscale of the display panel; The first calculation module is used to calculate the corrected gamma value based on the standard gamma value and the preset adjusted gamma value. The preset adjustment gamma value is determined by the following method: inputting a first power supply voltage to the display panel, calculating a first gamma value of at least one of the sub-pixels of the display panel; inputting a second power supply voltage to the display panel, calculating a second gamma value of at least one of the sub-pixels of the display panel, wherein the first power supply voltage is less than the second power supply voltage; determining the preset adjustment gamma value based on the first gamma value and the second gamma value; the preset adjustment gamma value is the magnitude of the deviation of the first gamma value from the second gamma value; the standard gamma value is a constant of gamma values ​​between gray levels; The second calculation module is used to calculate the corrected brightness data of the sub-pixels under the preset grayscale of the display panel based on the initial brightness data and the corrected gamma value. The compensation module is used to perform brightness compensation on the display panel based on the corrected brightness data.

12. A display device, characterized in that, The display panel includes the brightness compensation device of claim 11, wherein the brightness compensation device of the display panel is used to perform the brightness compensation method of the display panel according to any one of claims 1 to 10.

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