CN115035848A - Method for setting gamma extreme value parameter of display panel and display panel - Google Patents
Method for setting gamma extreme value parameter of display panel and display panel Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The application relates to the technical field of display panels, and particularly discloses a method for setting gamma extreme parameters of a display panel and the display panel, wherein the method for setting the gamma extreme parameters of the display panel comprises the following steps: setting gamma extreme value parameters corresponding to the brightness values; acquiring a plurality of gray scale intervals of the display panel according to the set brightness value and the gamma standard parameter value corresponding to the extreme gray scale; and determining corresponding gamma extreme value adjusting strategies according to different gray scale intervals, and adjusting the gamma extreme value parameters corresponding to the gray scale intervals. Through the mode, the gamma extreme value parameter setting method can enable the gamma debugging range of the display panel to be set reasonably.
Description
Technical Field
The present disclosure relates to display panel technologies, and in particular, to a method for setting gamma extremum parameters of a display panel and a display panel.
Background
Currently, an Active Matrix/Organic Light Emitting Diode (AMOLED) panel has a large process fluctuation and a complex process, so that it is impossible to use a set of gamma (Display parameters) in common as in an LCD (Liquid Crystal Display), and thus a good Display effect can be ensured.
The gamma is required to be debugged in a module factory, and then is burned into a chip of the display module to be given to a customer. And usually, customers have specific requirements on gamma, for example, the minimum value, the standard value and the maximum value of gamma are gamma2.0min, 2.2typ and 2.4max, or 1.9min, 2.2typ and 2.5 max. When debugging gamma in a factory, the corresponding brightness spec (brightness extreme value parameter) generally considers effect and time, if the setting range of the brightness spec is very small, the gamma debugging time is very long, which affects productivity, and if the brightness spec is set to be wider, which affects display effect.
The setting of the brightness spec and the gamma in the existing scheme is based on factory experience values, so that the problem that the gamma of partial products exceeds the specification (exceeds the maximum value or the minimum value of the gamma) frequently occurs, or the problem that the time for debugging the gamma in a production line is too long occurs.
Disclosure of Invention
The application provides a method for setting gamma extreme value parameters of a display panel and the display panel, so that the gamma debugging range of the display panel is reasonably set.
In order to solve the technical problem, the application adopts a technical scheme that: the setting method of the gamma extremum parameter of the display panel comprises the following steps: setting gamma extreme value parameters corresponding to the brightness values; acquiring a plurality of gray scale intervals of the display panel according to the set brightness value and the gamma standard parameter value corresponding to the extreme gray scale; and determining corresponding gamma extreme value adjusting strategies according to different gray scale intervals, and adjusting the gamma extreme value parameters corresponding to the gray scale intervals.
Wherein, the step of setting the gamma extreme value parameter corresponding to each brightness value comprises: setting gamma extreme value parameters corresponding to a plurality of reference brightness values; determining a gamma extreme value parameter corresponding to any brightness value between two adjacent reference brightness values based on the gamma extreme value parameters corresponding to the two adjacent reference brightness values; and setting the gamma extreme value parameter corresponding to the brightness interval which is greater than the reference brightness maximum value, and setting the gamma extreme value parameter corresponding to the brightness interval which is less than the reference brightness minimum value.
The step of determining the gamma extreme value parameter corresponding to any brightness value between two adjacent reference brightness values based on the gamma extreme value parameters corresponding to two adjacent reference brightness values includes:
calculating to obtain a gamma maximum value corresponding to any brightness value through an operation formula (1):
and (3) calculating to obtain a gamma minimum value corresponding to any brightness value through an operation formula (2):
wherein p and q are two adjacent reference brightness values respectively, and l is an arbitrary brightness value between p and q.
The step of obtaining a plurality of gray scale intervals of the display panel according to the set brightness value and the gamma standard parameter value corresponding to the extreme gray scale includes: setting a set brightness value and a gamma standard parameter value corresponding to the extreme gray scale; determining a plurality of binding point gray scales; determining a gray scale brightness value of each binding point gray scale based on the set brightness value corresponding to the extreme value gray scale and the gamma standard parameter value; acquiring a maximum gamma value and a minimum gamma value of each binding point gray scale based on a gamma extreme value parameter corresponding to a gray scale brightness value of each binding point gray scale; determining a target boundary gray scale of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale; determining the plurality of gray scale intervals based on the target boundary gray scale.
Wherein the step of determining the gray scale brightness value of each binding point gray scale based on the set brightness value corresponding to the extreme value gray scale and the gamma standard parameter value comprises:
calculating the gray scale brightness value of each binding point gray scale through an operation formula (3):
wherein n is the gray level value of the maximum gray level, i is the gray level value of the binding gray level, gamma is the gamma standard parameter value, and L is n And the set brightness value corresponding to the maximum value gray scale.
Wherein the step of determining a target boundary gray level of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each of the binding gray levels comprises: obtaining a difference value between the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale based on the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale; based on each the tie point gray scale correspond very big gamma value with the difference between the minimum gamma value is confirmed very big gamma value with in the difference between the minimum gamma value is for being greater than all tie point gray scales of predetermineeing the difference, with very big gamma value with the difference between the minimum gamma value is less than the adjacent tie point gray scale of predetermineeing the difference, as display panel's target boundary gray scale.
Wherein the step of determining a target boundary gray level of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each of the binding gray levels comprises: fitting operation is carried out on the maximum gamma value corresponding to each binding point gray scale, and a first fitting function curve is obtained; fitting operation is carried out on the minimum gamma value corresponding to each binding point gray scale, and a second fitting function curve is obtained; and determining gray scales adjacent to gray scales, of which the difference value between the maximum gamma value and the minimum gamma value is smaller than a preset difference value, in all gray scales, based on the first fitting function curve and the second fitting function curve, wherein the difference value between the maximum gamma value and the minimum gamma value is larger than the preset difference value, and taking the gray scales as target boundary gray scales of the display panel.
Wherein the step of determining the plurality of gray scale intervals based on the target boundary gray scale comprises: dividing all gray scales between any two adjacent target boundary gray scales into the same gray scale interval, dividing all gray scales larger than the maximum value target boundary gray scale into the same gray scale interval, and dividing all gray scales smaller than the minimum value target boundary gray scale into the same gray scale interval.
The step of determining a corresponding gamma extremum adjusting strategy according to different gray scale intervals and adjusting the gamma extremum parameters corresponding to each gray scale interval comprises the following steps: determining a first gray scale interval in which the difference value between the maximum gamma value and the minimum gamma value corresponding to each gray scale in the gray scale interval is greater than a preset difference value, and a second gray scale interval in which the difference value between the maximum gamma value and the minimum gamma value corresponding to each gray scale in the gray scale interval is less than the preset difference value; adjusting the gamma extreme value parameters corresponding to the first gray scale interval according to a first gamma extreme value adjusting strategy; and adjusting the gamma extreme value parameters corresponding to the second gray scale interval according to a second gamma extreme value adjusting strategy.
Wherein, the step of adjusting the gamma extremum parameter corresponding to the first gray scale interval according to the first gamma extremum adjustment strategy comprises: reducing the maximum gamma value corresponding to each gray scale in the first gray scale interval, and/or increasing the minimum gamma value corresponding to each gray scale in the first gray scale interval; or, the gamma extreme value parameter corresponding to the first gray scale interval is maintained unchanged; the step of adjusting the gamma extreme value parameter corresponding to the second gray scale interval according to the second gamma extreme value adjusting strategy comprises the following steps: and increasing the maximum gamma value corresponding to each gray scale in the second gray scale interval, and/or reducing the minimum gamma value corresponding to each gray scale in the second gray scale interval.
Wherein, the setting method further comprises: setting brightness error threshold values corresponding to the brightness ranges; determining a brightness extreme value corresponding to each gray scale based on the gamma extreme value parameter corresponding to each gray scale; determining the brightness range of the gray scale brightness value of each gray scale and the brightness error value of the gray scale brightness value of each gray scale according to the brightness extreme value corresponding to each gray scale; determining all gray scales of which the brightness error values of the gray scale brightness values are smaller than the brightness error threshold corresponding to the brightness range in which the gray scale brightness values are positioned as target gray scales; and increasing the brightness error value of the gray scale brightness value of the target gray scale so as to adjust the gamma extreme value parameter corresponding to the target gray scale.
Wherein, the step of determining the brightness extreme value corresponding to each gray scale based on the gamma extreme value parameter corresponding to each gray scale comprises:
calculating to obtain a brightness maximum value corresponding to each gray scale through an operation formula (4):
and (3) calculating to obtain a brightness minimum value corresponding to each gray scale through an operation formula (5):
wherein n is a gray scale value of the maximum gray scale, j is a gray scale value of each gray scale, gammajmax is the gamma maximum corresponding to the gray level j, gammajmin the gamma minimum value corresponding to the gray level j.
In order to solve the above technical problem, the present application adopts another technical solution: there is provided a display panel, which includes a memory and a processor coupled to each other, wherein the processor is configured to execute program instructions stored in the memory to implement any one of the above methods for setting gamma extremum parameters of the display panel.
The beneficial effect of this application is: different from the situation of the prior art, the setting method of the gamma extreme value parameters of the display panel in the application can obtain a plurality of gray scale intervals of the display panel according to the set brightness values corresponding to the extreme value gray scales and the gamma standard parameter values after setting the gamma extreme value parameters corresponding to each brightness value, then determine the corresponding gamma extreme value adjustment strategies according to different gray scale intervals, and adjust the gamma extreme value parameters corresponding to each gray scale interval, so that the gamma debugging range of the display panel can be set to be a reasonable range, the gamma specification can be met when the gamma is debugged, and the production line can be debugged for one-time pass.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:
FIG. 1 is a flowchart illustrating an embodiment of a method for setting gamma extremum parameters of a display panel according to the present invention;
FIG. 2 is a flowchart illustrating an embodiment of step S11 in FIG. 1;
FIG. 3 is a flowchart illustrating an embodiment of step S12 of FIG. 1;
FIG. 4 is a flowchart illustrating an embodiment of step S125 in FIG. 3;
FIG. 5 is a schematic flow chart of another embodiment of step S125 in FIG. 3;
FIG. 6 is a flowchart illustrating an embodiment of step S13 in FIG. 1;
FIG. 7 is a schematic diagram illustrating the division of gray scale intervals in an application scenario;
FIG. 8 is a schematic flowchart illustrating another embodiment of a method for setting gamma extremum parameters of a display panel according to the present application;
fig. 9 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present application clearer, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for setting gamma extremum parameters of a display panel according to an embodiment of the disclosure. The embodiment comprises the following steps:
s11: and setting gamma extreme value parameters corresponding to the brightness values.
It can be understood that, in order to ensure a better display effect of the display panel, the brightness of the display panel needs to be set, and the setting of the brightness needs to be performed by debugging the gamma value of the display panel, however, when the gamma value is debugged, due to the precision of the acquisition device, the instability of the screen brightness of the display panel, and other reasons, it is impossible to debug the brightness corresponding to each gray scale to the brightness corresponding to the gamma standard value, so that a brightness range, that is, the brightness spec, needs to be set, and the customer specification can be met as long as the brightness is debugged to the brightness spec. Because the brightness debugging needs to be realized through the gamma value debugging, a gamma value range, namely the gamma spec, can be set actually, and the customer specification can be met as long as the gamma is debugged to be within the gamma spec.
The range of gamma values is determined by a gamma maximum value and a gamma minimum value, which are gamma extreme value parameters. The gamma extremum parameter is specifically understood to be a parameter of an error range within which the corresponding gamma value of the display panel can be allowed when the display panel achieves the preset brightness value.
S12: and acquiring a plurality of gray scale intervals of the display panel according to the set brightness value and the gamma standard parameter value corresponding to the extreme gray scale.
Further, by performing data statistical analysis on the corresponding relationship between the gray scale and the brightness value that can be realized by the display panel, the gray scale in which the influence on the brightness value is large and the gray scale in which the influence on the brightness value is small can be determined, for example, a set brightness value and a gamma standard parameter value corresponding to an extreme gray scale of the display panel are first obtained, and the brightness values corresponding to other gray scales increase with the increase of the gray scale and decrease with the decrease of the gray scale, so that the brightness values corresponding to other gray scales can be obtained; the brightness is debugged through the gamma value, so that the brightness value corresponding to each gray scale is associated with a gamma extreme value parameter, namely, a maximum gamma value and a minimum gamma value are corresponding to each gray scale, the range of the gamma value between the maximum gamma value and the minimum gamma value corresponding to the gray scale with larger influence on the brightness value is larger, the range of the gamma value between the maximum gamma value and the minimum gamma value corresponding to the gray scale with smaller influence on the brightness value is smaller, and all the gray scales can be divided into a plurality of gray scale intervals according to the size of the range of the gamma value corresponding to each gray scale. Namely, a plurality of gray scale intervals of the display panel can be obtained according to the set brightness value and the gamma standard parameter value corresponding to the extreme gray scale.
S13: and determining corresponding gamma extreme value adjusting strategies according to different gray scale intervals, and adjusting the gamma extreme value parameters corresponding to the gray scale intervals.
It can be understood that, in step S12, all the gray scales are divided into a plurality of gray scale intervals according to the size of the gamma value range corresponding to each gray scale, for the gray scale with a large gamma value range, the time for actually debugging gamma in the production line may be too long, and for the gray scale with a small gamma value range, the debugged module gamma is easily out of the customer specification when the production line debugged the gamma, so that the corresponding gamma extreme value adjustment policy can be determined according to different gray scale intervals, and the gamma extreme value parameter corresponding to the gray scale in each gray scale interval is adjusted according to the corresponding gamma extreme value adjustment policy.
According to the scheme, after the gamma extreme value parameters corresponding to the brightness values are set, a plurality of gray scale intervals of the display panel can be obtained according to the set brightness values corresponding to the extreme value gray scales and the gamma standard parameter values, then the corresponding gamma extreme value adjusting strategies are determined according to different gray scale intervals, and the gamma extreme value parameters corresponding to the gray scale intervals are adjusted, so that the gamma debugging range of the display panel can be set to be a reasonable range, the gamma specification can be met when the gamma is debugged, and the production line can be debugged for one-time passing.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating an embodiment of step S11 in fig. 1. In an embodiment, the step S11 may specifically include the following steps:
s111: and setting gamma extreme value parameters corresponding to the plurality of reference brightness values.
It can be understood that, in order to set the gamma extremum parameter corresponding to each brightness value of the display panel, the gamma extremum parameter corresponding to a specific brightness value can be first expanded.
Specifically, brightness values of 100nit (nit, brightness unit), 10nit, 1nit, 0.1nit, 0.01nit, and 0.001nit may be selected as reference brightness values, and gamma extreme value parameters corresponding to the reference brightness values are set, where the gamma extreme value parameters corresponding to the reference brightness values include gamma maximum values and gamma minimum values corresponding to the reference brightness values. For example, since the larger the gamma value, the darker the screen display, the smaller the gamma value, the brighter the screen display, a brightness minimum (Lspec) of 100nit is set min ) The brightness value (L) corresponding to gamma value 2.21 gamma2.21 ) A maximum luminance value (Lspec) of 100nit is set max ) A brightness value (L) corresponding to a gamma value of 2.19 gamma2.19 ) Setting the gamma maximum value corresponding to 100nit as gamma2.21 and the gamma minimum value as gamma 2.19; similarly, a gamma maximum value corresponding to 10nit is gamma2.215, a gamma minimum value is gamma2.185, a gamma maximum value corresponding to 1nit is gamma2.22, a gamma minimum value is gamma2.18, a gamma maximum value corresponding to 0.1nit is gamma2.24, a gamma minimum value is gamma2.16, a gamma maximum value corresponding to 0.01nit is gamma2.26, a gamma minimum value is gamma2.14, a gamma maximum value corresponding to 0.001nit is gamma2.28, and a gamma minimum value is gamma 2.12. In other embodiments, the reference brightness values may be any other reasonable brightness values, and may have more or less brightness valuesThe number of reference brightness values, and the corresponding gamma extremum parameter may also be any other reasonable value, which is not limited in this application.
S112: and determining the gamma extreme value parameter corresponding to any brightness value between two adjacent reference brightness values based on the gamma extreme value parameters corresponding to the two adjacent reference brightness values.
Specifically, after the plurality of reference brightness values and the gamma extremum parameters corresponding to the reference brightness values are set, for the gamma extremum parameter corresponding to any brightness value between two adjacent reference brightness values, an interpolation method may be used to obtain the gamma extremum parameter corresponding to the two adjacent reference brightness values.
Further, the step S112 may specifically include:
calculating to obtain a gamma maximum value corresponding to any brightness value through an operation formula (1):
and (3) calculating to obtain a gamma minimum value corresponding to any brightness value through an operation formula (2):
wherein p and q are two adjacent reference brightness values respectively, and l is an arbitrary brightness value between p and q.
Specifically, p and q are two adjacent reference luminance values, respectively, and l is an arbitrary luminance value between p and q, so that the following formula can be obtained by interpolation:
by transforming the above equations, the corresponding equations (1) and (2) can be obtained. For example, p is 10nit, q is 100nit, 10nit ≦ l ≦ 100nit, and since the gamma maximum corresponding to 100nit is set to gamma2.21, the gamma minimum is set toThe gamma value is gamma2.19, the gamma maximum value corresponding to 10nit is gamma2.215, the gamma minimum value is gamma2.185, therefore, the gamma maximum value corresponding to the brightness value l
Gamma minimum corresponding to brightness value l
Then, when l is 55nit, the formula is substituted to obtain: the gamma maximum value corresponding to 55nit is gamma2.2125, the gamma minimum value corresponding to 55nit is gamma2.1875, and the gamma extremum parameters corresponding to other brightness values can be obtained by the same method.
S113: and setting the gamma extreme value parameter corresponding to the brightness interval which is greater than the reference brightness maximum value, and setting the gamma extreme value parameter corresponding to the brightness interval which is less than the reference brightness minimum value. The reference brightness maximum value is the maximum reference brightness value, and the reference brightness minimum value is the minimum reference brightness value.
It is understood that, in step S112, the gamma extremum parameter corresponding to any brightness value between two adjacent reference brightness values can be obtained through interpolation, however, the gamma extremum parameters corresponding to all brightness values greater than the maximum brightness value and all brightness values less than the minimum brightness value cannot be obtained through interpolation, and thus it is necessary to set the gamma extremum parameter corresponding to the brightness interval greater than the maximum brightness value and set the gamma extremum parameter corresponding to the brightness interval less than the minimum brightness value. For example, when 100nit is the reference brightness maximum and 0.001nit is the reference brightness minimum, the gamma maximum corresponding to all brightness values greater than 100nit may be set to gamma2.21, the gamma minimum may be set to gamma2.19, the gamma maximum corresponding to brightness values less than 0.001nit may be set to gamma2.35, and the gamma minimum may be set to gamma 2.05.
Referring to fig. 3, fig. 3 is a schematic flowchart illustrating an embodiment of step S12 in fig. 1. In an embodiment, the step S12 may further include the following steps:
s121: and setting a set brightness value and a gamma standard parameter value corresponding to the extreme value gray scale.
It can be understood that, in order to perform data statistics analysis on the corresponding relationship between the gray scale and the gamma value of the display panel, the data statistics analysis is first performed by using specific parameters.
Specifically, with reference to the maximum value and the minimum value, i.e., the extreme value gray level, of the gray levels that can be realized by the display panel, a set brightness value corresponding to the maximum value and the minimum value, i.e., any reasonable value such as the maximum value and the minimum value, of the brightness that can be realized by the display panel, is set first, and a gamma standard parameter value, i.e., gamma2.2typ, gamma2.4typ, is determined correspondingly. In addition, because it is generally necessary to provide a plurality of gamma groups for reasons such as the screen body condition of the display panel, etc., to ensure the display effect OK of the screen under the whole brightness bar, and it is necessary to provide a gamma group based on practical application scenarios of the user, for example, the maximum value and the minimum value of the brightness bar of the mobile phone, so 3 gamma groups can be set under the whole brightness bar of the screen, which are gamma 1-3, at this time, the set brightness value of the 255 gray scale corresponding to gamma1 can be set to 700nit, the set brightness value of the 255 gray scale corresponding to gamma2 can be set to 350nit, the set brightness value of the 255 gray scale corresponding to gamma3 can be set to 5nit, and the set brightness value of the 0 gray scale corresponding to gamma 1-3 can be set to 0 or less than 0.0005 nit.
S122: a plurality of binding point gray levels are determined.
It can be understood that, in order to set and analyze the gray levels of the display panel, a plurality of specific binding point gray levels are usually defined according to the maximum gray levels and the grouping number of the display panel.
For example, when the gray scale implementation range of the display panel is 0 to 255 and 10 specific binding point gray scales need to be marked off, it can be sequentially determined that the 10 binding point gray scales respectively correspond to: gamma gray1 ═ 0, gamma gray2 ═ 4, gamma gray3 ═ 8, gamma gray4 ═ 17, gamma gray5 ═ 32, gamma gray6 ═ 63, gamma gray7 ═ 100, gamma gray8 ═ 183, gamma gray9 ═ 222, and gamma gray10 ═ 255.
S123: and determining the gray scale brightness value of each binding point gray scale based on the set brightness value corresponding to the extreme value gray scale and the gamma standard parameter value.
Specifically, when a plurality of binding point gray scales are determined, the gray scale brightness value of each binding point gray scale can be calculated based on the set brightness value corresponding to the extreme value gray scale and the gamma standard parameter value according to the set function corresponding to the brightness and the gamma value.
S124: and acquiring a maximum gamma value and a minimum gamma value of each binding point gray scale based on the gamma extreme value parameter corresponding to the gray scale brightness value of each binding point gray scale.
Further, when the gray scale brightness value of each binding point gray scale is obtained, the gamma extreme value parameter corresponding to the gray scale brightness value of each binding point gray scale can be determined. Specifically, each gamma extreme value parameter is specifically set corresponding to each brightness value, so that when the gray scale brightness value of each binding point gray scale is determined, the gamma extreme value parameter corresponding to the gray scale brightness value of each binding point gray scale can be determined, and the maximum gamma value and the minimum gamma value of each binding point gray scale can be obtained.
S125: and determining a target boundary gray scale of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale.
It can be understood that, when the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale are obtained, the difference value between the maximum gamma value and the minimum gamma value is analyzed, so that the gray scale that the difference value between the maximum gamma value and the minimum gamma value is greater than the preset difference value is determined, and the difference value between the maximum gamma value and the minimum gamma value is less than the gray scale of the preset difference value, so that all gray scales that the difference value between the maximum gamma value and the minimum gamma value is greater than the preset difference value can be determined, and the gray scale adjacent to the gray scale that the difference value between the maximum gamma value and the minimum gamma value is less than the preset difference value or the binding point gray scale can be used as the target boundary gray scale of the display panel.
S126: determining the plurality of gray scale intervals based on the target boundary gray scale.
Specifically, after the target boundary gray scales are obtained, all gray scales between two adjacent target boundary gray scales can be divided into a gray scale interval, so that a plurality of gray scale intervals are determined.
Further, in an embodiment, the step S123 may specifically include: calculating the gray scale brightness value of each binding point gray scale through an operational formula (3):
wherein n is the gray level value of the maximum gray level, i is the gray level value of the binding gray level, gamma is the gamma standard parameter value, and L is n And the set brightness value corresponding to the maximum value gray scale.
For easy understanding, the gray level value n of the maximum gray level is 255, and the corresponding set brightness value L is 255 When the gamma standard parameter value γ is 2.2 as 500nit, it can be known that the gray scale luminance value of the binding gray scale i:
when the binding point gray scale i is equal to 255, 222, 183, 100, 63, 32, 17, 8, 4 and 0 in sequence, the gray scale brightness value of each binding point gray scale can be obtained through calculation.
It can be understood that the set brightness value L corresponding to the maximum value gray level 255 255 Any other reasonable parameter, such as 2nit or 5nit, may also be used, and the corresponding calculation process is the same as described above, and is not described herein again.
Referring to fig. 4, fig. 4 is a schematic flowchart illustrating an embodiment of step S125 in fig. 3. In an embodiment, the step S125 may specifically include the following steps:
s1251 a: and obtaining a difference value between the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale based on the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale.
S1252 a: based on each the tie point gray scale correspond very big gamma value with the difference between the minimum gamma value is confirmed very big gamma value with in the difference between the minimum gamma value is for being greater than all tie point gray scales of predetermineeing the difference, with very big gamma value with the difference between the minimum gamma value is less than the adjacent tie point gray scale of predetermineeing the difference, as display panel's target boundary gray scale.
Specifically, after acquiring the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale, the difference between the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale may be calculated, and then the difference between the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale is compared with a preset difference to determine the binding point gray scale in which the difference between the maximum gamma value and the minimum gamma value is greater than the preset difference and the binding point gray scale in which the difference between the maximum gamma value and the minimum gamma value is less than the preset difference, and then in all binding point gray scales in which the difference between the maximum gamma value and the minimum gamma value is greater than the preset difference, the binding point gray scale adjacent to the binding point gray scale in which the difference between the maximum gamma value and the minimum gamma value is less than the preset difference is acquired and used as a boundary for dividing gray scale intervals, that is, i.e. a target boundary gray scale of the display panel, the target boundary gray scale in the present embodiment is selected from the binding gray scales.
Referring to fig. 5, fig. 5 is a schematic flowchart illustrating another embodiment of step S125 in fig. 3. In an embodiment, the step S125 may specifically include the following steps:
s1251 b: and performing fitting operation on the maximum gamma value corresponding to each binding point gray scale to obtain a first fitting function curve.
S1252 b: and performing fitting operation on the minimum gamma value corresponding to each binding point gray scale, and obtaining a second fitting function curve.
Specifically, after the maximum gamma value corresponding to each binding point gray scale is determined, a suitable coordinate system may be established based on the maximum gamma values corresponding to all binding point gray scales, and fitting operation may be performed on the coordinate system to obtain a corresponding first fitting function curve, and the first fitting function curve may reflect the maximum gamma values corresponding to all the gray scales. Similarly, fitting operation is performed on the minimum gamma value corresponding to each binding point gray scale, so that a second fitting function curve can be obtained, and the second fitting function curve can reflect the minimum gamma values corresponding to all the gray scales.
S1253 b: and determining gray scales adjacent to gray scales, of which the difference value between the maximum gamma value and the minimum gamma value is smaller than a preset difference value, in all gray scales, based on the first fitting function curve and the second fitting function curve, wherein the difference value between the maximum gamma value and the minimum gamma value is larger than the preset difference value, and taking the gray scales as target boundary gray scales of the display panel.
Thus, since the first fitting function curve and the second fitting function curve can respectively reflect the maximum gamma value and the minimum gamma value corresponding to each gray scale, the difference between the maximum gamma value and the minimum gamma value corresponding to each gray scale can be calculated, then the difference between the maximum gamma value and the minimum gamma value corresponding to each gray scale is compared with a preset difference, the gray scale in which the difference between the maximum gamma value and the minimum gamma value is greater than the preset difference and the gray scale in which the difference between the maximum gamma value and the minimum gamma value is less than the preset difference are determined, then the gray scale adjacent to the gray scale in which the difference between the maximum gamma value and the minimum gamma value is less than the preset difference is obtained from all the gray scales in which the difference between the maximum gamma value and the minimum gamma value is greater than the preset difference is obtained, and the gray scales are used as the boundary of the divided gray scale intervals, namely the target boundary gray scale of the display panel, the target boundary gray scale in this embodiment is selected from all gray scales.
In an embodiment, the step S126 may specifically include: dividing all gray scales between any two adjacent target boundary gray scales into the same gray scale interval, dividing all gray scales larger than the maximum value target boundary gray scale into the same gray scale interval, and dividing all gray scales smaller than the minimum value target boundary gray scale into the same gray scale interval. The maximum value target boundary gray scale is the target boundary gray scale with the maximum gray scale value, and the minimum value target boundary gray scale is the target boundary gray scale with the minimum gray scale value.
It can be understood that, since the difference values between the maximum gamma value and the minimum gamma value corresponding to all gray scales between two adjacent target boundary gray scales are both greater than the preset difference value or both less than the preset difference value, all gray scales between any two adjacent target boundary gray scales can be divided into the same gray scale interval. Forming different gray scale intervals for all gray scales between the target boundary gray scales in the dividing mode; all gray scales between two adjacent target boundary gray scales can be further divided into a first gray scale interval and a second gray scale interval according to whether the difference value between the maximum gamma value and the minimum gamma value corresponding to each gray scale is larger than or smaller than a preset difference value. In addition, all gray scales larger than the maximum value target boundary gray scale are divided into a gray scale interval, and all gray scales smaller than the minimum value target boundary gray scale are also divided into a gray scale interval, so that all gray scales are divided into all gray scale intervals.
Referring to fig. 6, fig. 6 is a schematic flowchart illustrating an embodiment of step S13 in fig. 1. In an embodiment, the step S13 may specifically include the following steps:
s131: determining a first gray scale interval in which the difference value between the maximum gamma value and the minimum gamma value corresponding to each gray scale in the gray scale interval is greater than a preset difference value, and a second gray scale interval in which the difference value between the maximum gamma value and the minimum gamma value corresponding to each gray scale in the gray scale interval is less than the preset difference value.
S132: and adjusting the gamma extreme value parameters corresponding to the first gray scale interval according to a gamma extreme value first adjustment strategy.
S133: and adjusting the gamma extreme value parameters corresponding to the second gray scale interval according to a gamma extreme value second adjustment strategy.
Specifically, all gray scales with the difference value between the maximum gamma value and the minimum gamma value larger than the preset difference value are divided into a first gray scale interval, all gray scales with the difference value between the maximum gamma value and the minimum gamma value smaller than the preset difference value are divided into a second gray scale interval, namely, the range of the gamma value corresponding to each gray scale in the first gray scale interval is larger, the range of the gamma value corresponding to each gray scale in the second gray scale interval is smaller, because the time for debugging the gamma of an actual production line is possibly too long for the gray scale with the larger range of the gamma value, and for the gray scale with the smaller range of the gamma value, the debugged gamma module is easy to exceed the standard gamma value specification range required by a client when the gamma value is debugged by the production line, therefore, different gamma extreme value adjusting strategies are needed to be adopted for the gamma extreme value parameter corresponding to the first gray scale interval and the gamma extreme value parameter corresponding to the second gray scale interval, so that the gamma debugging range of all the positions of the display panel can be set in a reasonable range.
In an embodiment, the step S132 may specifically include: reducing the maximum gamma value corresponding to each gray scale in the first gray scale interval, and/or increasing the minimum gamma value corresponding to each gray scale in the first gray scale interval; or, the gamma extremum parameter corresponding to the first gray scale interval is maintained unchanged.
Specifically, since the difference between the maximum gamma value and the minimum gamma value corresponding to each gray scale in the first gray scale interval is greater than the preset difference, that is, the range of the gamma value corresponding to each gray scale in the first gray scale interval is large, and the time for debugging gamma in an actual production line may be long, it may be considered to appropriately reduce the range of the gamma value, or to keep the range of the gamma value unchanged. The method of reducing the range of the gamma value may be to reduce only the maximum gamma value corresponding to each gray scale in the first gray scale interval, or to increase only the minimum gamma value corresponding to each gray scale in the first gray scale interval, or to reduce the maximum gamma value corresponding to each gray scale in the first gray scale interval and increase the minimum gamma value corresponding to each gray scale in the first gray scale interval.
In an embodiment, the step S133 may specifically include: and increasing the maximum gamma value corresponding to each gray scale in the second gray scale interval, and/or reducing the minimum gamma value corresponding to each gray scale in the second gray scale interval.
Specifically, since the difference between the maximum gamma value and the minimum gamma value corresponding to each gray scale in the second gray scale interval is smaller than the preset difference, that is, the range of the gamma value corresponding to each gray scale in the second gray scale interval is smaller, it is easy for the debugged module gamma to exceed the standard range of the standard gamma value required by the customer when the gamma is debugged on the production line, so that the gamma value range can be considered to be properly enlarged. The manner of expanding the range of the gamma value may be to increase only the maximum gamma value corresponding to each gray scale in the second gray scale interval, or to decrease only the minimum gamma value corresponding to each gray scale in the second gray scale interval, or to increase the maximum gamma value corresponding to each gray scale in the second gray scale interval and decrease the minimum gamma value corresponding to each gray scale in the second gray scale interval.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating the division of gray level intervals in an application scene. Fig. 7 shows three curves of gamma2.0, gamma2.2, and gamma2.4, which can find that the brightness difference is very small at the low gray level and the high gray level, and the brightness difference is larger in the middle gray level region, so all gray levels can be divided into three gray level intervals, for example, all gray levels smaller than gray level 31 are divided into gray level interval one, gray level 31-gray level 241 are divided into gray level interval two, all gray levels larger than gray level 241 are divided into gray level interval three, and it is more reasonable to adopt different gamma spec settings for the three gray level intervals. Therefore, for all the gray scales in the gray scale interval one and the gray scale interval three, the maximum gamma value is increased by 0.05 and the minimum gamma value is decreased by 0.05 on the basis of the gamma spec which is originally set, so as to expand the gamma specs corresponding to all the gray scales which are smaller than the gray scale 31 and larger than the gray scale 241; for all gray levels in the gray level interval two, the originally set gamma spec can be kept unchanged, or the difference between the maximum gamma value and the minimum gamma value can be properly reduced.
Referring to fig. 8, fig. 8 is a schematic flowchart illustrating another embodiment of a method for setting gamma extremum parameters of a display panel according to the present disclosure. The embodiment comprises the following steps:
s81: and setting gamma extreme value parameters corresponding to the brightness values.
S82: and acquiring a plurality of gray scale intervals of the display panel according to the set brightness value and the gamma standard parameter value corresponding to the extreme gray scale.
S83: and determining corresponding gamma extreme value adjusting strategies according to different gray scale intervals, and adjusting the gamma extreme value parameters corresponding to the gray scale intervals.
Steps S81 to S83 in this embodiment are substantially the same as steps S11 to S13 in the above embodiment, and are not repeated here.
This embodiment further comprises the steps of:
s84: and setting a brightness error threshold corresponding to each brightness range.
It can be understood that, for the reasons of testing the accuracy of the photoelectric probe, the stability of the screen body, and the like, there is a certain error in the brightness displayed on the screen, so that a brightness error threshold value can be set, that is, it is required to ensure that the difference between the brightness maximum value and the brightness minimum value corresponding to each brightness value is not less than the corresponding brightness error threshold value, so as to avoid that the debugging of the brightness spec is not performed. In addition, different luminance error thresholds may be set for different luminance ranges, for example, a luminance error threshold is set to 0.1nit when the luminance value is greater than 100nit, a luminance error threshold is set to 0.08nit when the luminance value is between 100nit and 10nit, and so on for other luminance ranges.
S85: and determining the brightness extreme value corresponding to each gray scale based on the gamma extreme value parameter corresponding to each gray scale.
The brightness is debugged through the gamma value, so that the gamma extreme value parameters corresponding to the gray scales and the corresponding brightness extreme values have an association relationship, and the brightness extreme values corresponding to the gray scales can be determined because the gamma extreme value parameters corresponding to the gray scales are acquired in the previous step.
Further, the step S85 may specifically include:
calculating to obtain a brightness maximum value corresponding to each gray scale through an operation formula (4):
and (3) calculating to obtain a brightness minimum value corresponding to each gray scale through an operation formula (5):
wherein n is a gray level value of a maximum gray level, and j is a gray level value of each gray levelGrey scale value, gamma jmax Is the gamma maximum value corresponding to the gray level j jmin The gamma minimum value corresponding to the gray level j.
S86: and determining the brightness range of the gray scale brightness value of each gray scale and the brightness error value of the gray scale brightness value of each gray scale according to the brightness extreme value corresponding to each gray scale.
After the brightness extreme value corresponding to each gray scale is determined, because the brightness extreme value comprises a brightness maximum value and a brightness minimum value, the difference value between the brightness maximum value and the brightness minimum value can be calculated to obtain the brightness error value of the gray scale brightness value of each gray scale, and the brightness range where the gray scale brightness value of each gray scale is located is determined.
S87: and determining all gray scales of which the brightness error values of the gray scale brightness values are smaller than the brightness error threshold corresponding to the brightness range in which the gray scale brightness values are positioned as target gray scales.
S88: and increasing the brightness error value of the gray scale brightness value of the target gray scale so as to adjust the gamma extreme value parameter corresponding to the target gray scale.
After the brightness range of the gray scale brightness value of each gray scale and the brightness error value of the gray scale brightness value of each gray scale are determined, the brightness error value of the gray scale brightness value of each gray scale can be compared with the brightness error threshold corresponding to the brightness range of the gray scale brightness value, if the brightness error value of the gray scale brightness value of the target gray scale is found to be smaller than the brightness error threshold corresponding to the brightness range of the gray scale brightness value, the brightness error value of the gray scale brightness value of the target gray scale can be increased, so that the brightness error value of the gray scale brightness value of the target gray scale can be properly broadened, it can be understood that the brightness error value of the gray scale brightness value of the target gray scale is properly broadened, and actually, the gamma spec is properly broadened, that is, the gamma extreme value parameter corresponding to the target gray scale is adjusted, so as to ensure the passing rate of gamma spec debugging.
Fig. 9 is a schematic view of a display panel, and fig. 9 is a schematic structural diagram of an embodiment of the display panel. The display panel 91 in the present embodiment includes: the display panel gamma extremum parameter setting device comprises a processor 911 and a memory 912, wherein the memory 912 stores programs, and the processor 911 calls the programs stored in the memory to execute any one of the above methods for setting the gamma extremum parameter of the display panel.
The beneficial effect of this application is: different from the situation of the prior art, the method for setting the gamma extreme value parameters of the display panel in the application can acquire a plurality of gray scale intervals of the display panel according to the set brightness values and the gamma standard parameter values corresponding to the extreme value gray scales after setting the gamma extreme value parameters corresponding to each brightness value, then determine the corresponding gamma extreme value adjustment strategies according to different gray scale intervals, and adjust the gamma extreme value parameters corresponding to each gray scale interval, so that the gamma debugging range of the display panel can be set to be a reasonable range, the gamma specification can be met when the gamma is debugged, and the production line can be debugged to pass once.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.
Claims (13)
1. A method for setting gamma extremum parameters of a display panel, the method comprising:
setting gamma extreme value parameters corresponding to the brightness values;
acquiring a plurality of gray scale intervals of the display panel according to the set brightness value and the gamma standard parameter value corresponding to the extreme gray scale;
and determining corresponding gamma extreme value adjusting strategies according to different gray scale intervals, and adjusting the gamma extreme value parameters corresponding to each gray scale interval.
2. The method according to claim 1, wherein the step of setting the gamma extremum parameter corresponding to each brightness value comprises:
setting gamma extreme value parameters corresponding to a plurality of reference brightness values;
determining a gamma extreme value parameter corresponding to any brightness value between two adjacent reference brightness values based on the gamma extreme value parameters corresponding to the two adjacent reference brightness values; and
and setting the gamma extreme value parameter corresponding to the brightness interval which is greater than the reference brightness maximum value, and setting the gamma extreme value parameter corresponding to the brightness interval which is less than the reference brightness minimum value.
3. The setting method according to claim 2, wherein the step of determining the gamma extremum parameter corresponding to any brightness value between two adjacent reference brightness values based on the gamma extremum parameters corresponding to two adjacent reference brightness values comprises:
calculating to obtain a gamma maximum value corresponding to any brightness value through an operation formula (1):
and (3) calculating to obtain a gamma minimum value corresponding to any brightness value through an operation formula (2):
wherein p and q are two adjacent reference brightness values respectively, and l is any brightness value between p and q.
4. The method as claimed in claim 1, wherein the step of obtaining the plurality of gray scale intervals of the display panel according to the set brightness values and the gamma standard parameter values corresponding to the extreme gray scales comprises:
setting a set brightness value and a gamma standard parameter value corresponding to the extreme gray scale;
determining a plurality of binding point gray scales;
determining a gray scale brightness value of each binding point gray scale based on the set brightness value corresponding to the extreme value gray scale and the gamma standard parameter value;
acquiring a maximum gamma value and a minimum gamma value of each binding point gray scale based on a gamma extreme value parameter corresponding to a gray scale brightness value of each binding point gray scale;
determining a target boundary gray scale of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale;
determining the plurality of gray scale intervals based on the target boundary gray scale.
5. The method as claimed in claim 4, wherein the step of determining the gray level brightness value of each binding point gray level based on the set brightness value corresponding to the extreme value gray level and the gamma standard parameter value comprises:
calculating the gray scale brightness value of each binding point gray scale through an operational formula (3):
wherein n is the gray level value of the maximum gray level, i is the gray level value of the binding gray level, gamma is the gamma standard parameter value, and L is n And the set brightness value corresponding to the maximum value gray scale.
6. The setting method as claimed in claim 4, wherein the step of determining the target boundary gray level of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each of the binding gray levels comprises:
obtaining a difference value between the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale based on the maximum gamma value and the minimum gamma value corresponding to each binding point gray scale;
based on each the tie point gray scale correspond very big gamma value with the difference between the minimum gamma value is confirmed very big gamma value with in the difference between the minimum gamma value is for being greater than all tie point gray scales of predetermineeing the difference, with very big gamma value with the difference between the minimum gamma value is less than the adjacent tie point gray scale of predetermineeing the difference, as display panel's target boundary gray scale.
7. The setting method as claimed in claim 4, wherein the step of determining the target boundary gray level of the display panel based on the maximum gamma value and the minimum gamma value corresponding to each of the binding gray levels comprises:
fitting operation is carried out on the maximum gamma value corresponding to each binding point gray scale, and a first fitting function curve is obtained;
fitting operation is carried out on the minimum gamma value corresponding to each binding point gray scale, and a second fitting function curve is obtained;
and determining gray scales adjacent to gray scales, of which the difference value between the maximum gamma value and the minimum gamma value is smaller than a preset difference value, in all gray scales, based on the first fitting function curve and the second fitting function curve, wherein the difference value between the maximum gamma value and the minimum gamma value is larger than the preset difference value, and taking the gray scales as target boundary gray scales of the display panel.
8. The method according to claim 4, wherein the step of determining the gray level sections based on the target boundary gray level comprises:
dividing all gray scales between any two adjacent target boundary gray scales into the same gray scale interval, dividing all gray scales larger than the maximum value target boundary gray scale into the same gray scale interval, and dividing all gray scales smaller than the minimum value target boundary gray scale into the same gray scale interval.
9. The method according to claim 1, wherein the step of determining the corresponding gamma extremum adjusting strategy according to the different gray scale intervals and adjusting the gamma extremum parameter corresponding to each gray scale interval comprises:
determining a first gray scale interval in which the difference value between the maximum gamma value and the minimum gamma value corresponding to each gray scale in the gray scale interval is greater than a preset difference value, and a second gray scale interval in which the difference value between the maximum gamma value and the minimum gamma value corresponding to each gray scale in the gray scale interval is less than the preset difference value;
adjusting the gamma extreme value parameters corresponding to the first gray scale interval according to a first gamma extreme value adjusting strategy;
and adjusting the gamma extreme value parameters corresponding to the second gray scale interval according to a second gamma extreme value adjusting strategy.
10. The method of claim 9, wherein the step of adjusting the gamma extremum parameter corresponding to the first gray scale interval according to a first gamma extremum adjusting strategy comprises:
reducing the maximum gamma value corresponding to each gray scale in the first gray scale interval, and/or increasing the minimum gamma value corresponding to each gray scale in the first gray scale interval;
or, the gamma extreme value parameter corresponding to the first gray scale interval is maintained unchanged;
the step of adjusting the gamma extreme value parameter corresponding to the second gray scale interval according to the second gamma extreme value adjusting strategy comprises the following steps:
and increasing the maximum gamma value corresponding to each gray scale in the second gray scale interval, and/or reducing the minimum gamma value corresponding to each gray scale in the second gray scale interval.
11. The setting method according to any one of claims 1 to 10, characterized by further comprising:
setting brightness error threshold values corresponding to the brightness ranges;
determining a brightness extreme value corresponding to each gray scale based on the gamma extreme value parameter corresponding to each gray scale;
determining the brightness range of the gray scale brightness value of each gray scale and the brightness error value of the gray scale brightness value of each gray scale according to the brightness extreme value corresponding to each gray scale;
determining all gray scales of which the brightness error values of the gray scale brightness values are smaller than the brightness error threshold corresponding to the brightness range in which the gray scale brightness values are positioned as target gray scales;
and increasing the brightness error value of the gray scale brightness value of the target gray scale so as to adjust the gamma extreme value parameter corresponding to the target gray scale.
12. The method of claim 11, wherein the step of determining the brightness extremum corresponding to each gray scale based on the gamma extremum parameter corresponding to each gray scale comprises:
calculating to obtain a brightness maximum value corresponding to each gray scale through an operation formula (4):
and (3) calculating to obtain a brightness minimum value corresponding to each gray scale through an operation formula (5):
wherein n is the gray level value of the maximum gray level, j is the gray level value of each gray level, gamma jmax Is the gamma maximum value corresponding to the gray level j jmin The gamma minimum value corresponding to the gray level j.
13. A display panel, comprising a memory and a processor coupled to each other, wherein the processor is configured to execute program instructions stored in the memory to implement the method for setting gamma extremum parameters of the display panel according to any one of claims 1 to 12.
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