A method for setting brightness extreme value parameters and a display panel

Abstract

The present application relates to the field of display panel technology, and specifically discloses a method for setting brightness extreme value parameters and a display panel, wherein the setting method includes: setting each brightness extreme value parameter of each brightness range; obtaining the grayscale extreme value corresponding to the boundary gamma value of the display panel; obtaining all non-compliant binding point grayscales other than the grayscale extreme value; and adjusting the brightness extreme value parameters corresponding to the non-compliant binding point grayscales. In the above manner, the setting method of brightness extreme value parameters in the present application can effectively ensure that the gamma debugging of the display panel meets the specification requirements of the brightness extreme value parameters while also effectively ensuring that the gamma debugging process of the display panel production line is not easily interrupted and does not affect the debugging time and effect of the binding point grayscale that meets the requirements.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and in particular to a method for setting brightness extreme value parameters and a display panel. Background Art

[0002] Currently, due to the large process fluctuations and complexity of AMOLED (Active Matrix / Organic Light Emitting Diode) panels, it is impossible to guarantee good display quality by using a single set of gamma (display parameters) like LCD (Liquid Crystal Display). Instead, each AMOLED module needs to be debugged, and multiple sets of gammas need to be debugged from brightest to darkest. Customers often have clear gamma requirements. For example, the minimum, standard, and maximum gamma values ​​must correspond to gamma 2.0min, 2.2typ, 2.4max, or 1.9min, 2.2typ, 2.5max. When debugging gamma within the factory, the corresponding brightness spec (brightness extreme parameter) generally takes into account both performance and time. If the brightness spec setting range is too narrow, the gamma debugging time will be very long, affecting production capacity. However, if the brightness spec setting is too wide, the display quality will be affected.

[0003] Conventional brightness and gamma specifications are often based on factory experience, resulting in some products often exceeding gamma specifications (exceeding the maximum or minimum gamma values). Furthermore, since the brightness specification range for high and low grayscales is typically relatively large, this can easily lead to exceeding specifications. Setting the brightness specification too low will also tighten the brightness specification for intermediate grayscales, making gamma more difficult to adjust. Summary of the Invention

[0004] The present application provides a method for setting brightness extreme parameters and a display panel to solve the problem that the method for setting brightness extreme parameters of the display panel in the prior art makes the gamma of the display panel difficult to debug when the grayscale is high or low, and easily exceeds the customer's limit requirements.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a method for setting the brightness extreme parameters of a display panel, wherein the setting method includes: setting each brightness extreme parameter of each brightness range; obtaining the grayscale extreme value corresponding to the boundary gamma value of the display panel; obtaining all non-compliant binding point grayscales other than the grayscale extreme value; and adjusting the brightness extreme parameters corresponding to the non-compliant binding point grayscales.

[0006] Among them, the step of obtaining the grayscale extreme value corresponding to the boundary gamma value of the display panel includes: setting the set brightness value and gamma standard parameter value corresponding to the maximum grayscale; determining multiple binding point grayscales; determining the grayscale brightness value of each binding point grayscale based on the set brightness value and gamma standard parameter value corresponding to the maximum grayscale; determining the brightness range of the grayscale brightness value of each binding point grayscale based on the grayscale brightness value of each binding point grayscale; obtaining the brightness range of each binding point grayscale based on the brightness extreme value parameter corresponding to the brightness range of the grayscale brightness value of each binding point grayscale. The maximum grayscale brightness value and the minimum grayscale brightness value are obtained; based on the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale, the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale are obtained respectively; based on the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale, the boundary gamma value of the display panel is determined; wherein the boundary gamma value includes the boundary maximum gamma value and the boundary minimum gamma value, and the difference between the boundary maximum gamma value and the boundary minimum gamma value is a critical value greater than the preset difference; the grayscale extreme value is determined based on the boundary gamma value.

[0007] Among them, based on the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale, the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale are obtained respectively, including: normalizing the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale respectively to obtain the maximum normalized value and the minimum normalized value of each binding point grayscale; based on the maximum normalized value of each binding point grayscale and its grayscale value, the maximum gamma value corresponding to each binding point grayscale is obtained; based on the minimum normalized value of each binding point grayscale and its grayscale value, the minimum gamma value corresponding to each binding point grayscale is obtained.

[0008] Among them, the step of determining the boundary gamma value of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale includes: performing a fitting operation on the maximum gamma value corresponding to each binding point grayscale, and obtaining a first fitting function curve; performing a fitting operation on the minimum gamma value corresponding to each binding point grayscale, and obtaining a second fitting function curve; and determining the boundary gamma value of the display panel based on the first fitting function curve and the second fitting function curve.

[0009] The step of determining the grayscale brightness value of each binding point grayscale based on the set brightness value corresponding to the maximum grayscale and the gamma standard parameter value includes: calculating the grayscale brightness value of each binding point grayscale by using the calculation formula (1): Among them, n (n is a positive integer) is the maximum grayscale, i (i is a positive integer less than n) is the grayscale of any binding point, γ is the gamma standard parameter value, L n Set the brightness value corresponding to the maximum grayscale.

[0010] The steps of normalizing the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale to obtain the maximum normalized value and the minimum normalized value of each binding point grayscale include: calculating the maximum normalized value of each binding point grayscale by using formula (2): The minimum normalized grayscale value of each binding point is calculated by formula (3): Among them, n (n is a positive integer) is the maximum grayscale, i (i is a positive integer less than n) is the grayscale of any binding point, L n is the set brightness value corresponding to the maximum grayscale, L0 is the brightness value of grayscale 0, L imax is the maximum grayscale brightness value of the binding point grayscale i, L imin The minimum grayscale brightness value of the binding point grayscale i.

[0011] The steps of respectively obtaining the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale based on the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale include: calculating the maximum gamma value corresponding to each binding point grayscale by calculation formula (4): The minimum gamma value corresponding to the grayscale of each binding point is calculated by formula (5): Among them, l imax is the maximum normalized value of the gray level i of the binding point, l imin The minimum normalized value of the gray level i of the binding point.

[0012] Among them, the grayscale extreme value is a high grayscale extreme value, and the grayscale of the non-compliant binding points is not less than the grayscale extreme value; or the grayscale extreme value is a low grayscale extreme value, and the grayscale of the non-compliant binding points is not greater than the grayscale extreme value.

[0013] Among them, the step of adjusting the brightness extreme parameters corresponding to the grayscale of the binding point that does not meet the requirements includes: adjusting the brightness extreme parameters corresponding to the brightness range in which the grayscale brightness value of the binding point grayscale that does not meet the requirements is located; or adjusting the brightness extreme parameters corresponding to the grayscale of the binding point that does not meet the requirements, and maintaining the brightness extreme parameters of other binding point grayscales that meet the requirements in the brightness range in which the grayscale brightness value of the binding point grayscale that does not meet the requirements is located unchanged.

[0014] The step of adjusting the brightness extreme value parameter corresponding to the grayscale of the binding point that does not meet the requirements includes: downwardly reducing the brightness extreme value parameter corresponding to the grayscale of the binding point that does not meet the requirements.

[0015] To solve the above technical problems, another technical solution adopted in the present application is: providing a display panel, including a processor and a memory, wherein the processor calls a program stored in the memory to execute the method for setting the brightness extreme value parameters as described in any of the above items.

[0016] The beneficial effect of the present application is that, different from the prior art, the method for setting the brightness extreme value parameters of the display panel in the present application can obtain the grayscale extreme value corresponding to the boundary gamma value of the display panel after setting the brightness extreme value parameters of each brightness range, so as to obtain all non-compliant binding point grayscales outside the grayscale extreme value, and adjust the brightness extreme value parameters corresponding to the non-compliant binding point grayscales, thereby effectively ensuring that the gamma debugging of the display panel meets the specification requirements of the brightness extreme value parameters while avoiding increasing the difficulty of gamma debugging of the display panel production line, so as to effectively ensure that the gamma debugging process is not easily interrupted and does not affect the debugging time and effect of the binding point grayscale that meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. Among them:

[0018] Figure 1 1 is a flow chart of an embodiment of a method for setting brightness extreme value parameters of the present application;

[0019] Figure 2 yes Figure 1 A schematic flow chart of a specific embodiment corresponding to S12;

[0020] Figure 3 yes Figure 2 A flow chart of a specific embodiment corresponding to S126;

[0021] Figure 4 yes Figure 2 A flow chart of a specific embodiment corresponding to S127;

[0022] Figure 5 This is a schematic diagram of the fitting simulation of the maximum gamma value and the minimum gamma value corresponding to the grayscale of multiple binding points in the first scene;

[0023] Figure 6 : is a schematic diagram of the simulation of the fitting curve of the maximum gamma value and the minimum gamma value corresponding to the grayscale of multiple binding points in the second scene;

[0024] Figure 7 This is a simulation diagram of the fitting curves of the maximum gamma value and the minimum gamma value corresponding to the grayscale of multiple binding points in the third scene;

[0025] Figure 8 It is a structural diagram of an embodiment of a display panel of the present application. DETAILED DESCRIPTION

[0026] In order to make the technical problems solved by this application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0027] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] See also Figure 1 , Figure 1 1 is a flow chart of an embodiment of a method for setting brightness extreme value parameters of the present application. This embodiment includes the following steps:

[0029] S11: Setting each brightness extreme value parameter of each brightness range.

[0030] It is understandable that, in setting the brightness of a display panel, in order to ensure a better display effect, different brightness extreme value parameters, ie, brightness specs, are usually required to be set correspondingly for different brightness ranges.

[0031] The brightness extreme value parameter may be specifically understood as a ratio parameter of an allowable error range when the display panel achieves a preset brightness value.

[0032] Specifically, each brightness extreme value parameter is set according to each brightness range. For example, the brightness extreme value parameters of the brightness ranges Luminance:>100nit (nit, brightness unit), Luminance:10~100nit, Luminance:1~10nit, Luminance:0.1~1nit, Luminance:0.01~0.1nit, and Luminance:0.006~0.01nit are respectively set to Lref[0]=2%, Lref[1]=4%, Lref[2]=6%, Lref[3]=2%, Lref[4]=10%, and Lref[5]=20%. In other embodiments, the above-mentioned brightness ranges can also be any other reasonable brightness intervals, and there can also be more or fewer brightness ranges, and the corresponding brightness extreme value parameters can also be any other reasonable values, which is not limited in this application.

[0033] S12: Obtaining the grayscale extreme value corresponding to the boundary gamma value of the display panel.

[0034] Furthermore, by performing data statistical analysis on the correspondence between the grayscale and gamma value that can be achieved by the display panel, the grayscale extreme value that has a greater impact on the gamma value than other grayscales is determined. For example, the boundary gamma value of the display panel is first obtained, wherein the boundary gamma value can specifically be the gamma value corresponding to the starting point where the trend of change of the gamma value corresponding to the grayscale increases significantly as the grayscale gradually increases or decreases; or, the boundary gamma value can also include a boundary maximum gamma value and a boundary minimum gamma value, and can be specifically determined by obtaining a critical value corresponding to a difference between the boundary maximum gamma value and the boundary minimum gamma value that is greater than a preset difference.

[0035] It can be seen from this that after the boundary gamma value of the display panel is determined, the grayscale extreme value corresponding to the boundary gamma value can be determined according to the corresponding relationship between the gamma value and the grayscale.

[0036] S13: Obtain all non-compliant binding point grayscales except for the grayscale extreme values.

[0037] Furthermore, a reasonable number of multiple binding point grayscales are determined based on the grayscale range that can be achieved by the display panel, so that after obtaining the grayscale extreme value, all non-compliant binding point grayscales outside the numerical range defined by the grayscale extreme value can be determined based on the comparison relationship between the grayscale extreme value and the multiple binding point grayscales. For example, all binding point grayscales greater than or less than the grayscale extreme value are determined as non-compliant binding point grayscales.

[0038] It is understood that the non-compliant tie-point grayscale is determined by first determining the boundary gamma value and grayscale extremes that exceed the conventional settings of the display panel based on the corresponding relationship between gamma values ​​and tie-point grayscales, and then determining the numerical range corresponding to the grayscale extremes. Therefore, the non-compliant tie-point grayscale actually indicates that the corresponding gamma value exceeds the conventional setting and needs to be adjusted, and the adjustment is specifically based on the non-compliant tie-point grayscale.

[0039] S14: Adjust the brightness extreme value parameter corresponding to the grayscale of the binding point that does not meet the requirements.

[0040] Furthermore, the brightness extreme value parameters corresponding to the non-compliant binding point grayscale are adjusted. For example, when the current grayscale of the display panel is a non-compliant binding point grayscale and the current brightness is greater than 100 nit, the corresponding brightness extreme value parameter is adjusted by 2%. When the current brightness is within the range of 10 to 100 nit, the brightness extreme value parameter is adjusted by 4%, and so on. Each other brightness extreme value parameter is adjusted, that is, another set of brightness extreme value parameters is set separately for each non-compliant binding point grayscale, so as to be different from the previously set brightness extreme value parameters.

[0041] The above scheme, after setting the brightness extreme value parameters of each brightness range, obtains the grayscale extreme value corresponding to the boundary gamma value of the display panel to obtain all non-compliant binding point grayscales outside the grayscale extreme value, and adjusts the brightness extreme value parameters corresponding to the non-compliant binding point grayscales, thereby effectively ensuring that the gamma debugging of the display panel meets the specification requirements of the brightness extreme value parameters while avoiding increasing the difficulty of gamma debugging of the display panel production line, so as to effectively ensure that the gamma debugging process is not easily interrupted and does not affect the debugging time and effect of the binding point grayscale that meets the requirements.

[0042] Furthermore, in one embodiment, the above S14 may further specifically include: adjusting a brightness extreme value parameter corresponding to a brightness range in which the grayscale brightness value that does not meet the required binding point grayscale is located.

[0043] It is understandable that the adjustments made to each brightness extreme value parameter specifically correspond to each brightness range, so that after obtaining the grayscale of the binding point that does not meet the requirements, it is also necessary to determine the grayscale brightness value corresponding to the grayscale of the binding point that does not meet the requirements, so as to adjust the corresponding brightness extreme value parameter based on the brightness range in which the grayscale brightness value is located.

[0044] Furthermore, in one embodiment, the above S14 can specifically include: adjusting the brightness extreme parameters corresponding to the non-compliant binding point grayscale, and maintaining the brightness extreme parameters of other compliant binding point grayscales within the brightness range in which the grayscale brightness value of the non-compliant binding point grayscale is located.

[0045] It is understandable that since the non-compliant binding point grayscale can correspond to the brightness that can be achieved by any display panel, and there are some brightnesses whose corresponding brightness extreme parameters are reasonable, no adjustment is required. For example, when the non-compliant binding point grayscale is a low grayscale and its corresponding brightness is larger, the brightness extreme parameters corresponding to the larger brightness do not need to be adjusted, while the brightness extreme parameters corresponding to the smaller brightness need to be adjusted, or the brightness extreme parameters need to be set independently.

[0046] Furthermore, in one embodiment, the above S14 may further specifically include: reducing the brightness extreme value parameter corresponding to the grayscale of the binding point that does not meet the requirements.

[0047] It is understandable that the adjustment performed on the brightness extreme value parameter corresponding to the grayscale of the binding point that does not meet the requirements is specifically to adjust it to a value smaller than the previously set brightness extreme value parameters.

[0048] Furthermore, in one embodiment, the adjustment amplitude is specifically no greater than the difference between the brightness range within which the grayscale brightness value of the non-compliant binding point grayscale lies and the brightness extreme value parameter of the adjacent brightness range. In other embodiments, the adjustment amplitude for the brightness extreme value parameter corresponding to the non-compliant binding point grayscale may also be greater than the difference between the brightness range within which the grayscale brightness value of the non-compliant binding point grayscale lies and the brightness extreme value parameter of the adjacent brightness range. The specific adjustment amplitude may be determined by the customer's display quality requirements and production efficiency of the display panel, and this application does not impose any limitation on this.

[0049] See also Figure 2 , Figure 2 yes Figure 1 A flow chart of a specific embodiment corresponding to S12.

[0050] In one embodiment, the above S12 may further include the following steps:

[0051] S121: Setting the set brightness value and gamma standard parameter value corresponding to the maximum grayscale.

[0052] It is understandable that in order to perform statistical analysis on the correspondence between the grayscale and gamma value of the display panel, it is first necessary to expand it based on the more specific parameters.

[0053] Specifically, based on the maximum value of the grayscale that the display panel can achieve, that is, the maximum grayscale, a corresponding set brightness value is first set, such as any reasonable value such as the maximum or minimum value of the brightness that the display panel can achieve, and a corresponding gamma standard parameter value is determined, such as gamma2.2typ.

[0054] S122: Determine multiple binding point grayscales.

[0055] It is understandable that, in order to facilitate setting and analyzing the grayscale of the display panel, a plurality of specific binding point grayscales are usually defined based on the maximum grayscale of the display panel and the number of groups.

[0056] For example, when the grayscale implementation range of the display panel is 0 to 255 and 15 specific binding point grayscales need to be divided, the 15 binding point grayscales can be determined in sequence to correspond to %GammaGrayColor[0]=255, %GammaGrayColor[1]=240, %GammaGrayColor[2]=208, %GammaGrayColor[3]=144, %GammaGrayColor[4]=112, %GammaGrayColor[5]=80, %GammaGrayColor[6]=113, %GammaGrayColor[7]=116, %GammaGrayColor[8]=117, %GammaGrayColor[9]=119, %GammaGrayColor

[10] =114, %GammaGrayColor

[11] =117, %GammaGrayColor

[12] =119, %GammaGrayColor

[13] =118, %GammaGrayColor

[14] =119, %GammaGrayColor

[15] =119, %GammaGrayColor

[16] =117, %GammaGrayColor

[17] =119, %GammaGrayColor

[18] =119, %GammaGrayColor

[19] =121, %GammaGrayColor

[20] =123, %GammaGrayColor

[21] =123, %GammaGrayColor

[22] =123, %GammaGrayColor

[23] =123, %GammaGrayColor

[24] =123, %GammaGrayColor

[25] =123, %GammaGrayColor

[26] =123, %GammaGrayColor

[27] =123, %GammaGrayColor

[28] =123, %GammaG GammaGrayColor[6]=64, %GammaGrayColor[7]=40, %GammaGrayColor[8]=32, %GammaGrayColor[9]=24, %GammaGrayCo lor

[10] =16, %GammaGrayColor

[11] =8, %GammaGrayColor

[12] =4, %GammaGrayColor

[13] =1, %GammaGrayColor

[14] =0.

[0057] S123: Determine the grayscale brightness value of each binding point grayscale based on the set brightness value corresponding to the maximum grayscale and the gamma standard parameter value.

[0058] Specifically, when multiple binding point grayscales are determined, the grayscale brightness value of each binding point grayscale can be calculated based on the set brightness value corresponding to the maximum grayscale and the gamma standard parameter value according to the setting function corresponding to the brightness and gamma value.

[0059] S124: Based on the grayscale brightness value of each binding point grayscale, determine the brightness range of the grayscale brightness value of each binding point grayscale.

[0060] Furthermore, when the grayscale brightness value of each binding point grayscale is obtained, the brightness range of the grayscale brightness value of each binding point grayscale can be determined.

[0061] S125: Obtaining a maximum grayscale brightness value and a minimum grayscale brightness value of each binding point grayscale based on the brightness extreme value parameter corresponding to the brightness range in which the grayscale brightness value of each binding point grayscale lies.

[0062] Furthermore, since each brightness extreme value parameter is specifically set corresponding to each brightness range, when determining the brightness range in which the grayscale brightness value of each binding point grayscale is located, the corresponding brightness extreme value parameter can be determined based on the brightness range in which the grayscale brightness value of each binding point grayscale is located, and then the corresponding maximum grayscale brightness value and minimum grayscale brightness value can be calculated based on the grayscale brightness value and brightness extreme value parameter corresponding to each binding point grayscale.

[0063] S126: Based on the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale, respectively obtain the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale.

[0064] Furthermore, based on the setting function corresponding to the brightness and gamma value, the maximum gamma value corresponding to each binding point grayscale is calculated based on the maximum grayscale brightness value of each binding point grayscale, and the minimum gamma value corresponding to each binding point grayscale is calculated based on the minimum grayscale brightness value of each binding point grayscale.

[0065] S127: Determine a boundary gamma value of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale.

[0066] It can be understood that after obtaining the maximum gamma value and minimum gamma value corresponding to each binding point grayscale, the boundary gamma value of the display panel can be determined by analyzing the corresponding change trend and numerical range of the maximum gamma value and the minimum gamma value as the binding point grayscale gradually increases or decreases.

[0067] The boundary gamma value may specifically include a boundary maximum gamma value and a boundary minimum gamma value, and the difference between the boundary maximum gamma value and the boundary minimum gamma value is a critical value greater than a preset difference value.

[0068] In other embodiments, the boundary gamma value may specifically be a gamma value corresponding to a starting point where the trend of change of the gamma value corresponding to the grayscale increases significantly as the grayscale gradually increases or decreases.

[0069] S128: Determine the grayscale extreme value based on the boundary gamma value.

[0070] Furthermore, after the boundary gamma value is obtained, the grayscale extreme value corresponding to the boundary gamma value can be determined according to the corresponding relationship between the gamma value and the binding point grayscale.

[0071] Furthermore, in one embodiment, the above S123 may further specifically include: calculating the grayscale brightness value of each binding point grayscale by using the calculation formula (1):

[0072]

[0073] Among them, n (n is a positive integer) is the maximum grayscale, i (i is a positive integer less than n) is the grayscale of any binding point, γ is the gamma standard parameter value, L n Set the brightness value corresponding to the maximum grayscale.

[0074] For ease of understanding, the maximum grayscale n is 255, and its corresponding set brightness value L 255=500nit, and the gamma standard parameter value γ is 2.2 as an example, it can be seen that the grayscale brightness value of each binding point grayscale is: Among them, when the grayscale i of the binding point is set to 255, 240, 208, 144, 112, 80, 64, 40, 32, 24, 16, 8, 4, 1, and 0 respectively, the grayscale brightness value L of each binding point grayscale can be calculated. i .

[0075] It is understandable that the set brightness value L corresponding to the maximum grayscale 255 is 255 It can also be any other reasonable parameter, such as 2nit or 5nit, and the corresponding calculation process is the same as above, which will not be repeated here.

[0076] See also Figure 3 , Figure 3 yes Figure 2 FIG. 1 is a flow chart of a specific embodiment corresponding to S126 in FIG.

[0077] In one embodiment, the above S126 may further include the following steps:

[0078] S1261: Normalizing the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale respectively to obtain the maximum normalized value and the minimum normalized value of each binding point grayscale.

[0079] It is understandable that in order to facilitate the data statistical analysis of the correspondence between grayscale and gamma value, after obtaining the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale, they can also be normalized in turn to obtain the maximum normalized value and the minimum normalized value of each binding point grayscale, that is, the data characteristics of the maximum grayscale brightness value and the minimum grayscale brightness value can be changed through normalization processing, making it more convenient to process data.

[0080] S1262: Based on the maximum normalized value of the grayscale of each binding point and its grayscale value, obtain the maximum gamma value corresponding to the grayscale of each binding point.

[0081] Furthermore, after obtaining the maximum normalized value and grayscale value of each binding point grayscale, the maximum gamma value corresponding to each binding point grayscale can be calculated by the maximum normalized value and grayscale value of each binding point grayscale according to the setting function corresponding to the brightness and gamma value.

[0082] S1263: Based on the minimum normalized value of the grayscale of each binding point and its grayscale value, obtain the minimum gamma value corresponding to the grayscale of each binding point.

[0083] Similarly, after obtaining the minimum normalized value and grayscale value of each binding point grayscale, the minimum gamma value corresponding to each binding point grayscale can be calculated through the minimum normalized value and grayscale value of each binding point grayscale according to the setting function corresponding to the brightness and gamma value.

[0084] Furthermore, in one embodiment, the above S1261 may further specifically include: calculating the maximum normalized value of the grayscale of each binding point by using the calculation formula (2):

[0085]

[0086] The minimum normalized grayscale value of each binding point is calculated by formula (3):

[0087]

[0088] Among them, n (n is a positive integer) is the maximum grayscale, i (i is a positive integer less than n) is the grayscale of any binding point, L n is the set brightness value corresponding to the maximum grayscale, L0 is the brightness value of grayscale 0, L imax is the maximum grayscale brightness value of the binding point grayscale i, L imin The minimum grayscale brightness value of the binding point grayscale i.

[0089] For ease of understanding, the brightness value L is set 255 =500nit as an example, it can be seen that when the binding point grayscale i=255, since 500nit>100nit, the corresponding brightness extreme parameter is 2%, and the maximum grayscale brightness value L of the binding point grayscale 255 is 255max =500+500*2%nit=510nit, the minimum grayscale brightness value L of the grayscale 255 255min =500-500*2%nit=490nit, and so on, the maximum grayscale brightness value L corresponding to any other binding point grayscale i can be calculated in sequence. imax and minimum grayscale brightness value L imin , I will not go into details here.

[0090] And in getting L 255max After that, since L0=0, then l imax =L 255max / 500, and l imin =L 255min / 500, that is, l 255max =510 / 500=1.02,l 255min =L 255min / 500=490 / 500=0.98, and so on, the maximum normalized value l corresponding to any other binding point grayscale i can be calculated in turn. imaxand the minimum normalized value l imin , I will not go into details here.

[0091] Furthermore, in one embodiment, the above S126 may further specifically include: calculating the maximum gamma value corresponding to the grayscale of each binding point by using the calculation formula (4):

[0092]

[0093] The minimum gamma value corresponding to the grayscale of each binding point is calculated by formula (5):

[0094]

[0095] Among them, l imax is the maximum normalized value of the gray level i of the binding point, l imin The minimum grayscale brightness value of the binding point grayscale i.

[0096] It can be seen that after setting the set brightness value and gamma standard parameter value corresponding to the maximum grayscale, by setting the binding point grayscale i to 255, 240, 208, 144, 112, 80, 64, 40, 32, 24, 16, 8, 4, 1, and 0 in sequence, each gamma can be calculated in sequence through the above formulas (1) to (5). imax and gamma imin , and after analyzing the series of data obtained in sequence, the corresponding relationship between the grayscale and gamma value of the display panel can be obtained. For example, the corresponding relationship between the grayscale and gamma value of each gamma imax and / or gamma imin The data characteristics such as the corresponding change trend and the numerical range in which the gray level i of the binding point increases or decreases.

[0097] In other embodiments, by establishing a suitable coordinate system and calculating the gray level i and the corresponding gamma of each binding point, imax and gamma imin After fitting, the grayscale i and gamma of each binding point can be obtained. imax Function curve, as well as the grayscale i and gamma of each binding point imin function curve, so that the corresponding relationship between the grayscale and gamma value of the display panel can be observed more intuitively.

[0098] See also Figure 4 , Figure 4 yes Figure 2 A flow chart of a specific embodiment corresponding to S127 is shown in FIG.

[0099] In one embodiment, the above S127 may further include the following steps:

[0100] S1271: Perform a fitting operation on the maximum gamma value corresponding to the grayscale of each binding point, and obtain a first fitting function curve.

[0101] Specifically, if Figure 5 As shown, Figure 5 It is a fitting simulation diagram of the maximum gamma value and the minimum gamma value corresponding to the grayscale of multiple binding points in the first scene. It can be seen that after setting the set brightness value corresponding to the maximum grayscale 255 to 500nit and the gamma standard parameter value to 2.2, and calculating the maximum gamma value corresponding to the grayscale of each binding point in turn, a suitable coordinate system can be established based on this series of parameters, and a fitting operation can be performed on it to obtain the corresponding first fitting function curve.

[0102] S1272: Perform a fitting operation on the minimum gamma value corresponding to the grayscale of each binding point, and obtain a second fitting function curve.

[0103] Similarly, by performing a fitting operation on the minimum gamma value corresponding to the grayscale of each binding point, a corresponding second fitting function curve can be obtained.

[0104] S1273: Determine a boundary gamma value of the display panel based on the first fitting function curve and the second fitting function curve.

[0105] Furthermore, after obtaining the first fitting function curve and the second fitting function curve, it is possible to determine the starting point where the change trend increases significantly, or the gamma value corresponding to the critical value exceeding a specific numerical range by analyzing the specific characteristics of the first fitting function curve and the second fitting function curve, and determine it as the boundary gamma value of the display panel.

[0106] For example, by Figure 5 Analyzing the first and second fitting function curves in the figure shows that when the grayscale exceeds 190, the difference between the maximum and minimum gamma values ​​at the boundary begins to increase. If this difference is reduced by adjusting each brightness extreme parameter as a whole, it will affect other brightness ranges, such as the brightness extreme parameters corresponding to 100nit to 10nit. However, in reality, the brightness extreme parameters corresponding to this brightness range are within the specifications and do not require optimization. Tightening the corresponding brightness extreme parameters may cause gamma debugging to fail.

[0107] Among them, after analyzing all the binding point grayscales greater than 190, it can be seen that when the set brightness value corresponding to the maximum grayscale 255 is set to 500nit and the gamma standard parameter value is 2.2, the grayscale brightness value corresponding to the binding point grayscale 240 is 437nit, and the grayscale brightness value corresponding to the binding point grayscale 208 is 319nit. Since 437nit and 319nits are both greater than 100nit, the brightness extreme value parameter Lref[0]=2% is applicable.

[0108] If this extreme brightness parameter is tightened directly, theoretically, the gamma range corresponding to these binding point grayscales may be more in line with the regulations. However, since the grayscale brightness values ​​corresponding to all binding point grayscales greater than 124 are also greater than 100 nit, they are all applicable to the extreme brightness parameter Lref[0] = 2%. However, in fact, the binding point grayscale 144 already meets the requirements, and there is no need to tighten its corresponding extreme brightness parameter, that is, there is no need to reduce Lref[0]. After tightening, the gamma debugging will become more difficult, which may lead to debugging interruption.

[0109] Therefore, a more reasonable way is to set the brightness extreme parameters for 208, 240, and 255, that is, for the binding point grayscales greater than 190, independently. For example, by tightening the brightness extreme parameters corresponding to these three binding point grayscales, the original brightness extreme parameter 2% corresponding to greater than 100nit is adjusted to any reasonable parameter such as 1% or 1.2% or 1.5%, and the original brightness extreme parameter 4% corresponding to 100nit~10nit is adjusted to any reasonable parameter such as 3% or 3.2% or 3.5%, and so on. I will not go into details here. The other binding point grayscales still refer to the original settings, such as still using 2% and 4%, etc., so that the larger value binding point grayscales can be optimized to within the specifications without affecting the brightness extreme parameters of other binding point grayscales that are already within the specifications.

[0110] Please continue reading Figure 6 , Figure 6 3 is a simulation diagram of the fitting curve of the maximum gamma value and the minimum gamma value corresponding to the grayscale of multiple binding points in the second scene.

[0111] From this, we can see that when the set brightness value corresponding to the maximum grayscale of 255 is set to 2nit and the gamma standard parameter value is 2.2, the corresponding binding point grayscale is greater than 190, and the corresponding gamma value change trend begins to increase significantly, that is, the difference between the boundary maximum gamma value and the boundary minimum gamma value begins to gradually exceed the preset difference, and the binding point grayscale less than 190 still meets the requirements.

[0112] Therefore, it can be determined that each brightness extreme value parameter corresponding to all binding point grayscales greater than 190 needs to be set separately, or the original brightness extreme value parameter needs to be adjusted, while other binding point grayscales still use the original settings.

[0113] Further, by Figure 6 It can also be seen that after the binding point grayscale is less than 22, the corresponding gamma value change trend also begins to increase significantly, that is, the difference between the boundary maximum gamma value and the boundary minimum gamma value also begins to gradually exceed the preset difference. Similarly, the brightness extreme value parameters corresponding to all binding point grayscales less than 22 also need to be set separately, or their original corresponding brightness extreme value parameters, that is, a parameter close to 6%, are adjusted. For other binding point grayscales and other set brightness values, the brightness extreme value parameters still use the original settings. This can ensure the overall effect of the display panel without affecting other brightness. In addition, by only adjusting the brightness extreme value parameters corresponding to the binding point grayscales that do not meet the requirements, while the other binding point grayscales still use the original settings, it is also avoided that the corresponding gamma debugging difficulty increases due to the simultaneous adjustment of the brightness extreme value parameters of other binding point grayscales, which may lead to debugging interruption.

[0114] Please continue reading Figure 7 , Figure 7 It is a simulation diagram of the fitting curve of the maximum gamma value and the minimum gamma value corresponding to the grayscale of multiple binding points in the third scene.

[0115] in, Figure 7 Specifically, when the set brightness value corresponding to the maximum grayscale 255 is set to 5 nit and the gamma standard parameter value is set to 2.2, the first fitting function curve and the second fitting function curve are obtained accordingly.

[0116] It can be seen from this that when the brightness value is set to 5 nit, the change trend of the corresponding gamma value begins to increase significantly after the binding point grayscale is less than 16, that is, the difference between the corresponding boundary maximum gamma value and the boundary minimum gamma value begins to gradually exceed the preset difference. Therefore, it is necessary to independently set the brightness extreme value parameters corresponding to all binding point grayscales less than 16 corresponding to 5 nit, or adjust their original corresponding brightness extreme value parameters, that is, a parameter close to 6%.

[0117] It is understandable that by importing the analysis tool of gamma and brightness spec into the display panel, the brightness spec corresponding to the high grayscale binding point can be independently set, and some low grayscale binding points under low brightness can be independently set. While effectively ensuring that the gamma debugging of the display panel meets the specification requirements of the brightness extreme parameters, it can also avoid increasing the difficulty of gamma debugging of the display panel production line, so as to effectively ensure that the gamma debugging process is not easily interrupted and does not affect the debugging time and effect of the binding point grayscale that meets the requirements.

[0118] This application also provides a display panel, see Figure 8 , Figure 8 2 is a schematic diagram of the structure of an embodiment of a display panel of the present application. The display panel 21 in this embodiment includes: a processor 211 and a memory 212, wherein the memory 212 stores a program, and the processor 211 calls the program stored in the memory to execute the method for setting the brightness extreme value parameter as described in any of the above items.

[0119] The beneficial effect of the present application is that, different from the prior art, the method for setting the brightness extreme value parameters of the display panel in the present application can obtain the grayscale extreme value corresponding to the boundary gamma value of the display panel after setting the brightness extreme value parameters of each brightness range, so as to obtain all non-compliant binding point grayscales outside the grayscale extreme value, and adjust the brightness extreme value parameters corresponding to the non-compliant binding point grayscales, thereby effectively ensuring that the gamma debugging of the display panel meets the specification requirements of the brightness extreme value parameters while avoiding increasing the difficulty of gamma debugging of the display panel production line, so as to effectively ensure that the gamma debugging process is not easily interrupted and does not affect the debugging time and effect of the binding point grayscale that meets the requirements.

[0120] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for setting a brightness extreme value parameter of a display panel, characterized in that: The setting method includes: Set the brightness extreme value parameters of each brightness range; Obtaining a grayscale extreme value corresponding to a boundary gamma value of the display panel; Obtain all non-compliant binding point grayscales other than the grayscale extreme value, wherein all binding point grayscales greater than or less than the grayscale extreme value are the non-compliant binding point grayscales, and at the same time, if the grayscale extreme value is a high grayscale extreme value, the non-compliant binding point grayscales are not less than the grayscale extreme value; or if the grayscale extreme value is a low grayscale extreme value, the non-compliant binding point grayscales are not greater than the grayscale extreme value; Adjust the brightness extreme value parameter corresponding to the grayscale of the non-compliant binding point; The step of obtaining the grayscale extreme value corresponding to the boundary gamma value of the display panel includes: Set the brightness value and gamma standard parameter value corresponding to the maximum grayscale; Determine the grayscale of multiple binding points; Determining the grayscale brightness value of each binding point grayscale based on the set brightness value corresponding to the maximum grayscale and the gamma standard parameter value; Determining a brightness range within which the grayscale brightness value of each binding point grayscale lies based on the grayscale brightness value of each binding point grayscale; Based on the brightness extreme value parameters corresponding to the brightness range of the grayscale brightness value of each binding point grayscale, obtaining the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale; Based on the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale, respectively obtaining the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale; Determining the boundary gamma value of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each of the binding point grayscales; wherein the boundary gamma value includes a boundary maximum gamma value and a boundary minimum gamma value, and the difference between the boundary maximum gamma value and the boundary minimum gamma value is a critical value greater than a preset difference value; The grayscale extreme value is determined based on the boundary gamma value.

2. The setting method according to claim 1, wherein: The obtaining of the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale based on the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale includes: Normalizing the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale to obtain the maximum normalized value and the minimum normalized value of each binding point grayscale; Based on the maximum normalized value of the grayscale of each binding point and its grayscale value, obtaining the maximum gamma value corresponding to the grayscale of each binding point; Based on the minimum normalized value of each binding point grayscale and its grayscale value, the minimum gamma value corresponding to each binding point grayscale is obtained.

3. The setting method according to claim 1 or 2, characterized in that: The step of determining the boundary gamma value of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each of the binding point grayscales includes: Performing a fitting operation on the maximum gamma value corresponding to the grayscale of each binding point to obtain a first fitting function curve; Performing a fitting operation on the minimum gamma value corresponding to the grayscale of each binding point to obtain a second fitting function curve; The boundary gamma value of the display panel is determined based on the first fitting function curve and the second fitting function curve.

4. The setting method according to claim 1, wherein: The step of determining the grayscale brightness value of each binding point grayscale based on the set brightness value corresponding to the maximum grayscale and the gamma standard parameter value includes: The grayscale brightness value of each binding point grayscale is calculated by the calculation formula (1): Wherein, n (n is a positive integer) is the maximum grayscale, i (i is a positive integer less than n) is any of the binding point grayscales, γ is the gamma standard parameter value, L n is the set brightness value corresponding to the maximum grayscale.

5. The setting method according to claim 2, characterized in that: The step of normalizing the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale to obtain the maximum normalized value and the minimum normalized value of each binding point grayscale includes: The maximum normalized value of the grayscale of each binding point is calculated by formula (2): The minimum normalized grayscale value of each binding point is calculated by formula (3): Wherein, n (n is a positive integer) is the maximum grayscale, i (i is a positive integer less than n) is any of the binding point grayscales, L n is the set brightness value corresponding to the maximum grayscale, L0 is the brightness value of grayscale 0, L imax is the maximum grayscale brightness value of the binding point grayscale i, L imin The minimum grayscale brightness value of the binding point grayscale i.

6. The setting method according to claim 5, characterized in that: The step of respectively obtaining the maximum gamma value and the minimum gamma value corresponding to each binding point grayscale based on the maximum grayscale brightness value and the minimum grayscale brightness value of each binding point grayscale comprises: The maximum gamma value corresponding to each grayscale of the binding point is calculated by the calculation formula (4): The minimum gamma value corresponding to each grayscale of the binding point is calculated by formula (5): Among them, l imax is the maximum normalized value of the gray level i of the binding point, l imin The minimum normalized value of the gray level i of the binding point.

7. The setting method according to any one of claims 1 to 6, characterized in that: The step of adjusting the brightness extreme value parameter corresponding to the grayscale of the non-compliant binding point includes: Adjusting the brightness extreme value parameter corresponding to the brightness range of the grayscale brightness value of the non-compliant binding point grayscale; or The brightness extreme value parameter corresponding to the non-compliant binding point grayscale is adjusted, and the brightness extreme value parameters of other compliant binding point grayscales within the brightness range where the grayscale brightness value of the non-compliant binding point grayscale is located are maintained unchanged.

8. The setting method according to any one of claims 1 to 6, characterized in that: The step of adjusting the brightness extreme value parameter corresponding to the grayscale of the non-compliant binding point includes: The brightness extreme value parameter corresponding to the grayscale of the non-compliant binding point is adjusted downward.

9. A display panel comprising a processor and a memory, characterized in that: The memory stores a program, and the processor calls the program stored in the memory to execute the method for setting brightness extreme value parameters according to any one of claims 1 to 8.

Images