CN116741098B - Brightness adjusting method and storage medium - Google Patents

Brightness adjusting method and storage medium Download PDF

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CN116741098B
CN116741098B CN202310648024.7A CN202310648024A CN116741098B CN 116741098 B CN116741098 B CN 116741098B CN 202310648024 A CN202310648024 A CN 202310648024A CN 116741098 B CN116741098 B CN 116741098B
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brightness
gamma
preset
voltage
node
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CN116741098A (en
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赵洋
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Shanghai Aoxian Technology Co ltd
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Shanghai Aoxian Technology Co ltd
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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
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The application provides a brightness adjusting method and a storage medium, wherein the brightness adjusting method comprises the following steps: determining a brightness dimming architecture, and respectively acquiring a data voltage domain, a brightness voltage domain and a gray scale index of a plurality of groups of preset gamma nodes; performing first gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different data voltage domains to obtain a first interpolation result; performing second gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different brightness voltage domains to obtain a second interpolation result; performing third gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different gray scale indexes to obtain a third interpolation result; and acquiring a brightness dimming curve according to the first interpolation result, the second interpolation result and the third interpolation result. The brightness adjusting method and the storage medium provided by the application not only meet the requirements of smooth brightness curve, no brightness inversion and low brightness color accuracy and power saving in different display modes during brightness adjustment.

Description

Brightness adjusting method and storage medium
Technical Field
The application relates to the technical field of display, in particular to a brightness adjusting method and a storage medium.
Background
Currently, the DBV (Display Brightness Voltage, display brightness level) dimming scheme of an AMOLED (Active Matrix/Organic LIGHT EMITTING Diode) display screen includes a multiple Gamma (Gamma) dimming scheme: and presetting a plurality of groups of gamma curves according to the characteristics and performance requirements of the display screen. Each group of gamma curves corresponds to a specific brightness range, and when brightness needs to be adjusted, the gamma curve closest to the target brightness can be selected, or the gamma curve suitable for the target brightness can be calculated by an interpolation method.
In the course of conception and implementation of the present application, the inventors found that at least the following problems exist: the current gamma curve interpolation method is to interpolate by utilizing two adjacent groups of preset gamma curves, the two groups of gamma curves must be corrected under the same voltage parameter and the same brightness and gray scale relation, and the requirements of brightness curve smoothness, brightness inversion free, low brightness color accuracy, power saving in different modes and the like cannot be met in a compatible manner in the DBV dimming process.
The foregoing description is provided for general background information and does not necessarily constitute prior art.
Disclosure of Invention
In order to alleviate the above problems, the present application provides a brightness adjustment method and a storage medium.
In one aspect, the present application provides a brightness adjustment method, specifically comprising:
determining a brightness dimming architecture, and respectively acquiring a data voltage domain, a brightness voltage domain and a gray scale index of a plurality of groups of preset gamma nodes;
Performing first gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different data voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same data voltage domain, wherein the gamma values and the corresponding brightness are used as a first interpolation result;
performing second gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different brightness voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same brightness voltage domain, wherein the gamma values and the corresponding brightness are used as second interpolation results;
Performing third gamma interpolation on two adjacent groups of preset gamma nodes with different corresponding gray scale indexes to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same gray scale index domain, wherein the gamma values and the corresponding brightness are used as a third interpolation result;
and acquiring a brightness dimming curve according to the first interpolation result, the second interpolation result and the third interpolation result.
Optionally, the preset gamma nodes in the brightness adjustment method include adjacent first preset gamma nodes and second preset gamma nodes, and the step of performing first gamma interpolation on two adjacent groups of preset gamma nodes with different corresponding data voltage domains includes:
acquiring a first mapping table of gamma register values and data voltages of the first preset gamma nodes according to a mapping formula of the data voltages and the registers, and acquiring a second mapping table of gamma register values and data voltages of the second preset gamma nodes according to a mapping formula of the data voltages and the registers, wherein a data voltage range interval of the first preset gamma nodes is larger than a data voltage range interval of the second preset gamma nodes;
according to the second mapping table, acquiring data voltages respectively corresponding to a red component register value, a green component register value and a blue component register value in each gray level of a second preset gamma node;
and respectively acquiring a corrected red component register value corresponding to the red component register value, a corrected green component register value corresponding to the green component register value and a corrected blue component register value corresponding to the blue component register value according to the first mapping table and the data voltage.
Optionally, after executing the step of obtaining the corrected red component register value corresponding to the red component register value, the corrected green component register value corresponding to the green component register value, and the corrected blue component register value corresponding to the blue component register value according to the mapping relation between the first mapping table and the first preset gamma node, the brightness adjustment method includes:
Obtaining a red component register value, a green component register value and a blue component register value in each gray level of the first preset gamma node, and performing linear gamma interpolation between the first preset gamma node and the second preset gamma node according to the corrected red component register value, the corrected green component register value and the corrected blue component register value in each gray level of the second preset gamma node to generate the first interpolation result.
Optionally, a mapping formula of the data voltage and the register in the brightness adjustment method is:
Vg＝VGMP-[Ga_num*(VGMP-VGSP)/Ga_with]；
Wherein VGMP is a maximum data voltage, VGSP is a minimum data voltage, ga_width is a gamma node bit width, ga_num is a gamma register value, and Vg is a data voltage.
Optionally, the preset gamma nodes in the brightness adjustment method include adjacent third preset gamma nodes and fourth preset gamma nodes, the adjacent two groups of preset gamma nodes with different corresponding brightness voltage domains perform second gamma interpolation to obtain gamma values and corresponding brightness of the adjacent two groups of preset gamma nodes under the same brightness voltage domain, and the step of taking the gamma values and the corresponding brightness as the second interpolation result includes:
Acquiring a first brightness voltage and a first brightness of a third preset gamma node, and acquiring a second brightness voltage and a second brightness of a fourth preset gamma node adjacent to the third preset gamma node;
Acquiring third brightness of the third preset gamma node under the second brightness voltage, and acquiring fourth brightness of the fourth preset gamma node under the first brightness voltage;
Acquiring the brightness corresponding to each brightness voltage in the third preset gamma node from the first brightness voltage to the second brightness voltage according to a mapping formula of the first brightness voltage and the brightness, and acquiring the brightness corresponding to each brightness voltage in the fourth preset gamma node from the first brightness voltage to the second brightness voltage according to a mapping formula of the second brightness voltage and the brightness;
And performing gamma interpolation between the third preset node and the fourth preset node according to the brightness corresponding to the third preset gamma node and the brightness corresponding to the fourth preset gamma node under the same brightness voltage to generate the second interpolation result.
Optionally, a mapping formula of the first luminance voltage and luminance in the luminance adjustment method is:
LV3i＝(ELVSSi-ELVSS2)*[(LV1-LV3)/(ELVSS1-ELVSS2)]+LV3；
the mapping formula of the second brightness voltage and brightness is as follows:
LV4i＝(ELVSSi-ELVSS2)*[(LV4-LV2)/(ELVSS1-ELVSS2)]+LV2；
Wherein ELVSS1 is a first luminance voltage, ELVSS2 is a second luminance voltage, LV1 is a first luminance, LV3 is a third luminance, LV2 is a second luminance, LV4 is a fourth luminance, ELVSSi is a luminance voltage from the first luminance voltage to the second luminance voltage, LV3i is a luminance of the third preset node under ELVSSi, and LV4i is a luminance of the fourth preset node under ELVSSi.
Optionally, the preset gamma nodes in the brightness adjustment method include a fifth preset gamma node and a sixth preset gamma node that are adjacent to each other, the adjacent two groups of preset gamma nodes with different corresponding gray scale indexes perform a third gamma interpolation to obtain gamma values and corresponding brightness of the adjacent two groups of preset gamma nodes in the same gray scale index domain, and the step of serving as a third interpolation result includes:
Obtaining the maximum brightness, the first gray scale index and the maximum gray scale value of a fifth preset gamma node, obtaining the second gray scale index of a sixth preset gamma node adjacent to the fifth preset gamma node, and converting the first gray scale index of the fifth preset gamma node into the second gray scale index;
Obtaining theoretical brightness corresponding to each gray level of a fifth preset node according to a mapping formula of brightness and gray level, and determining a corrected red component register value, a corrected green component register value and a corrected blue component register value corresponding to the theoretical brightness according to a brightness and register comparison table;
and acquiring a red component register value, a green component register value and a blue component register value in each gray level of the sixth preset node, and performing gamma interpolation between the fifth preset node and the sixth preset node according to the corrected red component register value, the corrected green component register value and the corrected blue component register value in each gray level of the fifth preset node to generate the third interpolation result.
Optionally, the mapping formula of the luminance and the gray scale in the luminance adjustment method is:
LVi5＝LV5*(GRAY/GRAYmax)^A；
wherein LV5 is the maximum brightness, GRAY is the GRAY scale value, GRAYmax is the maximum GRAY scale value, A is the second GRAY scale index, LVi is the theoretical brightness.
Optionally, the brightness adjustment method further includes:
Performing gamma interpolation on a plurality of adjacent two groups of preset gamma nodes with the same corresponding brightness voltage domain, data voltage domain and gray scale index to obtain gamma values and corresponding brightness of the plurality of adjacent two groups of preset gamma nodes, wherein the gamma values and the corresponding brightness are used as a plurality of interpolation results;
Combining the plurality of interpolation results with the first interpolation result, the second interpolation result and/or the third interpolation result to generate a brightness dimming curve.
In another aspect, the present application also provides a storage medium, in particular, a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the brightness adjustment method as described above.
As described above, in the brightness adjustment method and the storage medium provided by the application, in the process of matching a plurality of groups of preset gamma nodes with a brightness dimming architecture, a first gamma interpolation is performed through two adjacent groups of preset gamma nodes with different corresponding data voltage domains, so as to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same data voltage domain, and the gamma values and the corresponding brightness are used as a first interpolation result; performing second gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different brightness voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same brightness voltage domain, wherein the gamma values and the corresponding brightness are used as second interpolation results; performing third gamma interpolation on two adjacent groups of preset gamma nodes with different corresponding gray scale indexes to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same gray scale index domain, wherein the gamma values and the corresponding brightness are used as a third interpolation result; and finally obtaining a brightness dimming curve according to the first interpolation result, the second interpolation result and the third interpolation result, and completing interpolation of two groups of preset gamma nodes under different voltage parameters and different gray scale indexes, so that the brightness curve is smooth without brightness inversion during brightness adjustment, and the requirements of low brightness, accurate color and power saving under different display modes are met.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a flowchart of a brightness adjusting method according to an embodiment of the application.
Fig. 2 is a block diagram of a brightness adjusting structure according to an embodiment of the application.
Fig. 3 is a graph of the brightness dimming curve based on fig. 2.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments. Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the element defined by the phrase "comprising one … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element, and furthermore, elements having the same name in different embodiments of the application may have the same meaning or may have different meanings, the particular meaning of which is to be determined by its interpretation in this particular embodiment or by further combining the context of this particular embodiment.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
First embodiment
In one aspect, the present application provides a brightness adjustment method, and fig. 1 is a flowchart of a brightness adjustment method according to an embodiment of the present application.
Referring to fig. 1, in an embodiment, the brightness adjustment method includes:
s10: and determining a brightness dimming architecture, and respectively acquiring a data voltage domain, a brightness voltage domain and a gray scale index of a plurality of groups of preset gamma nodes.
Illustratively, the DBV scheme architecture is determined according to the characteristics and performance requirements of the display screen, and a plurality of groups of gamma nodes are preset. Optionally, the number of the preset gamma nodes is not limited, and the appropriate number of the preset gamma nodes is selected according to the actual requirement and the performance requirement of the DBV dimming. The data voltage domain is a voltage dimming interval for controlling display brightness, the data voltage domain corresponds to a display brightness level interval, a minimum Value (VGSP) of the data voltage corresponds to a minimum value of the display brightness level, and a maximum Value (VGMP) of the data voltage corresponds to a maximum value of the display brightness level. The luminance voltage domain is a positive electrode voltage (ELVDD) to a negative electrode voltage (ELVSS) of the control screen light emitting diode. The gray scale index is an index relationship between a gray scale value and display brightness.
S20: and performing first gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different data voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same data voltage domain, wherein the gamma values and the corresponding brightness are used as a first interpolation result.
In an exemplary embodiment, gamma interpolation can be completed between two groups of preset gamma nodes corresponding to different data voltage domains, so as to solve the problem of low-brightness color shift in the DBV dimming process by correcting color deviation by a low-brightness preset gamma curve.
S30: and performing second gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different brightness voltages to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same brightness voltage domain, wherein the gamma values and the corresponding brightness are used as second interpolation results.
In an exemplary embodiment, gamma interpolation can be completed between two groups of preset gamma nodes corresponding to different brightness voltage domains, so as to solve the problem that the interpolation of multiple groups of preset gamma nodes cannot be shared with dynamic brightness voltages.
S40: and performing third gamma interpolation on two adjacent groups of preset gamma nodes with different corresponding gray scale indexes to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same gray scale index domain, wherein the gamma values and the corresponding brightness are used as a third interpolation result.
For example, gamma interpolation can be completed between two groups of preset gamma nodes corresponding to different gray scale indexes, so that the problem that multi-gamma interpolation cannot be shared with display mode or application scene switching is solved.
S50: and acquiring a brightness dimming curve according to the first interpolation result, the second interpolation result and the third interpolation result.
In the embodiment, the brightness adjustment method completes interpolation of two groups of preset gamma nodes under different voltage parameters and different gray scale indexes in the process of matching the multiple groups of preset gamma nodes with the brightness dimming framework, so that the brightness curve is smooth and has no brightness inversion during brightness adjustment, and the requirements of low brightness, accurate color and power saving under different display modes can be met.
In one embodiment, the predetermined gamma nodes include adjacent first and second predetermined gamma nodes.
The brightness adjustment method is performed at S20: performing first gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different data voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same data voltage domain, wherein the step of serving as a first interpolation result comprises the following steps:
S21: acquiring a first mapping table of gamma register values and data voltages of a first preset gamma node according to a mapping formula of the data voltages and the registers, and acquiring a second mapping table of gamma register values and data voltages of a second preset gamma node according to a mapping formula of the data voltages and the registers, wherein the data voltage domain of the first preset gamma node is larger than the data voltage domain of the second preset gamma node.
Optionally, the data voltage is present in the form of a gamma register value in the driving chip. Each gamma register value corresponds to the data voltage of a certain gear of the data voltage domain by equally dividing the data voltage domain into a plurality of gears. If the data voltage domain of the second preset gamma node is to be mapped to the data voltage domain of the first preset gamma node in a normalized manner, the data voltage domain of the first preset gamma node may be set to be larger than the data voltage domain of the second preset gamma node. The first table is an information table of 6 groups of preset gamma nodes. By way of example, by way of a table scheme, it can be seen that Gamma Bh6 corresponds to VGSP6 and Gamma Bh5 corresponds to VGSP5 voltage differently, then the Data (Data) voltage ranges corresponding to the Gamma registers are different. And carrying out normalization processing on the data voltage range corresponding to the registers of the two groups of preset gamma nodes, wherein the aim is to find the gamma value and the corresponding brightness under the same voltage domain, and then completing the gamma interpolation of the section Seg 5. Through calculation, two groups of preset gamma values, corresponding voltage ranges and mapping relations between voltages and registers can be obtained.
S22: and acquiring data voltages corresponding to the red component register value, the green component register value and the blue component register value in each gray level of the second preset gamma node according to the second mapping table.
Optionally, the gamma register values include three color pixel register values, a red component register value, a green component register value, and a blue component register value in each gray level of the second preset gamma node are measured. In the second mapping table, data voltages corresponding to the register values of the three color pixels in each gray scale can be obtained. For example, please continue to refer to table one, gamR6_reg, gamG6_reg, gamB6_reg, and corresponding data voltages vg_ GamR6_reg, vg_ GamG6 _6_reg, vg_ GamB6_reg may be found by looking up the ga_table 6.
S23: and respectively acquiring a corrected red component register value corresponding to the red component register value, a corrected green component register value corresponding to the green component register value and a corrected blue component register value corresponding to the blue component register value according to the first mapping table and the data voltage.
Optionally, according to the first mapping table, searching a gamma register value of a first preset gamma node corresponding to the data voltage of the second preset gamma node, and taking the gamma register value as the corrected gamma register value. For example, with continued reference to Table one, vg_ GamR6_reg, vg_ GamG6_reg, vg_ GamB6_reg may find the corresponding register value in Ga_table5, i.e., re_ GamR _reg, re_ GamR5_reg, re_ GamR5_reg, thus normalizing the registers in two different data voltage ranges to the same voltage domain. Since the data voltage range corresponding to gamma_bh5 is larger, the value of gamma_bh6 needs to be mapped to gamma_bh5 correspondingly.
In one embodiment, the brightness adjustment method is performed in S23: according to the first mapping table and the data voltage, the steps of respectively obtaining the corrected red component register value corresponding to the red component register value, the corrected green component register value corresponding to the green component register value and the corrected blue component register value corresponding to the blue component register value include:
S24: obtaining a red component register value, a green component register value and a blue component register value in each gray level of a first preset gamma node, and performing linear gamma interpolation between the first preset gamma node and a second preset gamma node according to the corrected red component register value, the corrected green component register value and the corrected blue component register value in each gray level of the second preset gamma node to generate a first interpolation result.
Optionally, according to the corrected gamma register values, mapping the data voltages corresponding to the three color pixel register values in each gray level of the second preset gamma node to the data voltage domain of the first preset gamma node may be implemented. Illustratively, please continue with table one, the gamma interpolation of the Seg5 portion is accomplished with re_ GamR6_reg, re_ GamR6_reg, re_ GamR6_reg, and GamR5_reg, gamR5_reg, gamR5 _5_reg, measured luminance corresponding to the luminance gamma.
In this embodiment, the brightness adjustment method realizes that two groups of preset gamma nodes can complete gamma interpolation corresponding to different data voltage domains based on the normalization principle, so as to solve the problems of DBV dimming process and low brightness color cast caused by correcting color deviation of the low-brightness preset gamma nodes.
In one embodiment, the mapping formula of the data voltage and the register in the brightness adjustment method is:
Vg＝VGMP-[Ga_num*(VGMP-VGSP)/Ga_with]；
Wherein VGMP is a maximum data voltage, VGSP is a minimum data voltage, ga_width is a gamma node width, ga_num is a gamma register value, and Vg is a data voltage.
Fig. 2 is a block diagram of a brightness adjusting structure according to an embodiment of the application. The first table is an information table of 6 groups of preset gamma nodes.
Referring to fig. 2 and table one in combination, 6 sets of preset Gamma nodes Gamma Bh1 to 6 are taken as an example. The DBV bit width is 10 bits, the range is 0 to 1023, the abscissa DBV represents the display brightness level value, and the dbv_d1 to 6 represent the display brightness level value corresponding to each preset gamma node. The ordinate Lv of fig. 2 represents luminance, and Lv1 to 6 represent the maximum luminance corresponding to each preset gamma node. Seg1 to 5 represent brightness curves corresponding to gamma interpolation performed by two groups of adjacent preset gamma nodes. The preset gamma node is 10 bits wide, the width Ga_width is 1024, and the range of the register value Ga_num is 0 to 1023. The gray scale range is 0 to 255, and each group of preset gamma nodes selects 34 adjustable gray scale nodes. ELVSS1 to 6 represent negative luminance voltages corresponding to the 6 sets of preset gamma nodes, respectively. ELVDD1 to 6 represent positive luminance voltages corresponding to 6 sets of preset gamma nodes, respectively. VGSP1 through 6 represent that 6 sets of preset gamma nodes correspond to minimum data voltages, respectively. VGMP 1-6 represent 6 groups of preset gamma nodes corresponding to the maximum data voltages, respectively.
List one
The data voltage domains of adjacent Gamma_Bh5 and Gamma_Bh6 are different, and interpolation of the Seg5 area is completed by taking the adjacent Gamma_Bh5 and Gamma_Bh6 as examples.
(1) The second table is a mapping table of Gamma register values and data voltages for gamma_Bh5 and gamma_Bh6. Referring to Table II, only the correspondence between partial gamma register values and data voltages is shown.
By the mapping formula of the data voltage and the register:
Vg6=vgmp6- [ ga_num (VGMP 6-VGSP 6)/ga_width ] to obtain a mapping table ga_table6 of gamma_bh6 corresponding to Gamma register values and data voltages;
by the mapping formula of the data voltage and the register:
Vg5=vgmp5- [ ga_num (VGMP 5-VGSP 5)/ga_width ] to obtain a mapping table ga_table5 of gamma_bh5 corresponding to the Gamma register value and the data voltage.
(2) The third table is a comparison table of register values of red, green and blue components corresponding to each gray level node of gamma_bh6 and register values of correction red, green and blue components. Referring to Table III, only a portion of the contrast relationship between gray scale nodes and register values is shown. GamR6_reg represents a red component register value, gamG6_reg represents a green component register value, and GamB6_reg is a blue component register value. Re_ GamR6_reg is the corrected red component register value, re_ GamG6_reg is the corrected green component register value, and Re_ GamB6_reg is the corrected blue component register value. In combination with table two and table three, the register value of each gray level in the lookup table three corresponds to the data voltage in table two ga_table6, for example, the register values 379, 359, 451 of 255 gray levels are 4.519531,4.597656,4.238281 respectively.
(3) Corresponding register values, re_ GamR6_reg, re_ GamR6_reg, re_ GamR6_reg, e.g. 4.519531,4.597656,4.238281 correspond to 303, 287, 361, respectively, are found in ga_table5 from the data voltages in table two ga_table 6. Registers of two different data voltage domains are normalized and mapped to the same data voltage domain. Since the data voltage domain corresponding to Gamma_Bh5 is larger, the register value of Gamma_Bh6 needs to be mapped correspondingly to Gamma_Bh5.
(4) Gamma interpolation of the Seg5 portion is accomplished with re_ GamR6_reg, re_ GamG6_reg, re_ GamB6_reg, and GamR5 _5_reg, gamG5 _5_reg, gamB5 _5_reg, measured luminance corresponding to luminance gamma. The application focuses on the normalization scheme, and the linear interpolation part is not shown.
Watch II
Watch III
In one embodiment, the predetermined gamma nodes include adjacent third and fourth predetermined gamma nodes. The brightness adjustment method is performed at S30: performing a second gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different brightness voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same brightness voltage domain, wherein the step of obtaining the second interpolation result comprises the following steps:
S31: the first brightness voltage and the first brightness of a third preset gamma node are obtained, and the second brightness voltage and the second brightness of a fourth preset gamma node adjacent to the third preset gamma node are obtained.
Alternatively, the luminance voltage is typically a negative luminance voltage. Because the negative brightness voltages of the third preset gamma node and the fourth preset gamma node are different, in order to complete interpolation of two adjacent preset gamma nodes, interpolation calculation needs to be performed on brightness corresponding to the brightness voltage from the first brightness voltage to the second brightness voltage of the third preset gamma node and the fourth preset gamma node respectively. For example, please continue to refer to table one, gamma Bh1 corresponds to ELVSS1, gamma Bh2 corresponds to ELVSS2, and the corresponding negative luminance voltages are different. The ELVSS normalization processing is needed, the corresponding brightness of two corrected groups of preset gamma nodes under the same ELVSS is found, and the aim is to find the brightness and the corresponding gamma value under the same voltage domain, so that the gamma interpolation of the Seg1 part is completed.
S32: and obtaining third brightness of a third preset gamma node under the second brightness voltage, and obtaining fourth brightness of a fourth preset gamma node under the first brightness voltage.
Optionally, the third brightness of the third preset gamma node under the second brightness voltage is measured, and the linear relation between the brightness voltage transformation and the brightness transformation of the third preset gamma node can be calculated. And the fourth brightness of the fourth preset gamma node under the first brightness voltage is measured, and the linear relation between the brightness voltage conversion and the brightness conversion of the fourth preset gamma node can be calculated. Illustratively, the measured Gamma register value GamR1_reg, gamG1_reg, gamB1_reg for the 255 th gray level of Gamma Bh1 yields Re_L1 at the corresponding brightness of ELVSS2 condition; gamma register values GamR _reg, gamG2_reg, gamB _reg for the 255 th gray scale of Gamma Bh2 obtain brightness re_l2 under ELVSS 1.
S33: and acquiring the brightness corresponding to each brightness voltage in the first brightness voltage to the second brightness voltage of the third preset gamma node according to a mapping formula of the first brightness voltage and the brightness, and acquiring the brightness corresponding to each brightness voltage in the first brightness voltage to the second brightness voltage of the fourth preset gamma node according to a mapping formula of the second brightness voltage and the brightness.
Optionally, the first brightness voltage to the second brightness voltage are equally divided into a plurality of gears, and the brightness of the brightness voltage of each gear under the third preset gamma node and the fourth preset gamma node is calculated respectively. Illustratively, luminance and luminance voltage slopes ELk 1= (LV 1-re_lv1)/(ELVSS 1-ELVSS 2) and luminance voltage slopes elk2= (re_lv2-LV 2)/(ELVSS 1-ELVSS 2) of the Gamma Bh1 and the Gamma Bh2 are obtained by linear relation of luminance and luminance voltage, respectively. The theoretical brightness re_lv1i= (ELVSSi-ELVSS 2) × ELk1+re_lv2 of the Gamma Bh1 corresponding to ELVSSi in the interpolation process, and the theoretical brightness re_lv2i= (ELVSSi-ELVSS 2) ×elk2+re_lv2 of the Gamma Bh2 can be obtained by the slope.
S34: and performing linear gamma interpolation between the third preset node and the fourth preset node according to the brightness corresponding to the third preset gamma node and the brightness corresponding to the fourth preset gamma node under the same brightness voltage to generate a second interpolation result.
For example, two sets of registers for correcting the preset gamma nodes and the corresponding brightness when the voltage ELVSSi is changed, the normalization processing of the brightness voltage domain is completed, and the interpolation of the gamma registers and the brightness is completed under different ELVSSi.
In this embodiment, the brightness adjustment method realizes that two groups of preset gamma nodes can complete gamma interpolation corresponding to different brightness voltage domains based on the normalization principle, so as to solve the problem that multiple gamma interpolation cannot be shared with a dynamic brightness voltage domain.
In one embodiment, a mapping formula of the first luminance voltage and the luminance in the luminance adjustment method is:
LV3i＝(ELVSSi-ELVSS2)*[(LV1-LV3)/(ELVSS1-ELVSS2)]+LV3；
the mapping formula of the second brightness voltage and brightness is:
LV4i＝(ELVSSi-ELVSS2)*[(LV4-LV2)/(ELVSS1-ELVSS2)]+LV2；
Wherein ELVSS1 is the first luminance voltage, ELVSS2 is the second luminance voltage, LV1 is the first luminance, LV3 is the third luminance, LV2 is the second luminance, LV4 is the fourth luminance, ELVSSi is the luminance voltage from the first luminance voltage to the second luminance voltage, LV3i is the luminance of the third preset node at ELVSSi, and LV4i is the luminance of the fourth preset node at ELVSSi.
Referring to fig. 2 and table one in combination, for example, luminance voltage domains of adjacent gamma_bh1 and gamma_bh2 are different, and interpolation of seg1 region is performed by taking adjacent gamma_bh1 and gamma_bh2 as an example.
(1) The 255 th gray level node in Gamma_Bh1 is-3 v at ELVSS1, the corresponding brightness LV1 is 700nits, the 255 th gray level node in Gamma_Bh2 is-2.5 v at ELVSS2, and the corresponding brightness LV2 is 500nits.
(2) Table IV is a comparison table of luminance voltages and luminance of Gamma_Bh1 and Gamma_Bh2. Referring to Table IV, the brightness of the 255 th gray level node in Gamma_Bh1 at ELVSS2 is found to be Re_LV1 675nits, and the brightness of the 255 th gray level node in Gamma_Bh2 at ELVSS1 is found to be Re_LV2 525nits. By the linear relation between the luminance voltage and the luminance, the slope ELk 1= (LV 1-re_lv1)/(ELVSS 1-ELVSS 2) =50 and the slope elk2= (re_lv2-LV 2)/(ELVSS 1-ELVSS 2) =50 of the gamma_bh1 can be obtained, respectively, wherein the absolute value of the luminance voltage is calculated.
In practice, ELVSS voltage has a specific power ic output, and the minimum output step is 0.1V. Re_lv1i= (ELVSSi-ELVSS 2) ELk1 +re_lv1=690 nits when ELVSSi =2.8v (re_lv1i=lv1 when ELVSSi is-3V). Re_lv2i= (ELVSSi-ELVSS 2) elk2+lv2=515 nits when ELVSSi =2.8v (re_lv2i=lv2 when ELVSSi is-2.5V). And similarly, repeating the steps to finish ELVSSi the corresponding brightness under the conditions of-2.6 v, -2.8v and-2.9 v, and calculating the corresponding brightness of Gamma_Bh1 and Gamma_Bh2 under the same ELVSSi condition, thereby finishing normalization processing. And interpolating the gamma register by utilizing the relation between the display brightness and the register. The normalization process is highlighted here and the interpolation process is not described.
ELVSSi Re_LV1i Re_LV2i
-3 700 525
-2.9 695 520
-2.8 690 515
-2.7 685 510
-2.6 680 505
-2.5 675 500
Table four
In one embodiment, the predetermined gamma nodes include a fifth predetermined gamma node and a sixth predetermined gamma node adjacent to each other. The brightness adjustment method is performed at S40: performing a third gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different gray scale indexes to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same gray scale index domain, wherein the step of using the gamma values and the corresponding brightness as a third interpolation result comprises the following steps:
S41: obtaining the maximum brightness, the first gray scale index and the maximum gray scale value of a fifth preset gamma node, obtaining the second gray scale index of a sixth preset gamma node adjacent to the fifth preset gamma node, and converting the first gray scale index of the fifth preset gamma node into the second gray scale index.
For example, please continue to refer to table one, the adjacent Gamma brightness-gray scale relationships are gamma_bh5 corresponding to Gamma1.8 and gamma_bh4 corresponding to Gamma2.2, respectively. And (3) finishing correction of preset Gamma_Bh1-6, and making brightness corresponding to each group of Gamma nodes into a lookup table of brightness and Gamma registers, wherein adjacent interpolation is carried out between each gray scale and brightness, and the width of the table is expanded. The gray scale index represents the corresponding relation between the gray scale finger and the brightness of each preset gamma node. Because the gray scale indexes of the fifth preset gamma node and the sixth preset gamma node are different, in order to complete interpolation of two adjacent preset gamma nodes, the gray scale index of the fifth preset gamma node needs to be converted to be consistent with the gray scale index of the sixth preset gamma node.
S42: and obtaining theoretical brightness corresponding to each gray level of a fifth preset node according to a mapping formula of brightness and gray level, and determining corrected red component register values, corrected green component register values and corrected blue component register values corresponding to the theoretical brightness according to a brightness and register comparison table.
Illustratively, the maximum luminance LV5 corresponding to gamma_bh5 is calculated according to the following formula: LVi5 =lv5 (GRAY/GRAYmax)/(2.2). And inquiring the corresponding register value according to the brightness LVi corresponding to each gray level. A new set of gamma2.2 registers ReCom _ GamR5_reg, reCom _ GamG5 _5_reg, reCom _ GamB5 _5_reg is generated. The brightness-gray scale relation of the Gamma_Bh4 and the Gamma_Bh5 is unified, and the corresponding register is obtained under the Gamma 2.2. Optionally, a comparison relation between the register value and the brightness of each preset gamma node is measured, and a brightness and register comparison table is generated.
S43: and obtaining a red component register value, a green component register value and a blue component register value in each gray level of a sixth preset node, and performing linear gamma interpolation between the fifth preset node and the sixth preset node according to the corrected red component register value, the corrected green component register value and the corrected blue component register value in each gray level of the fifth preset node to generate a third interpolation result.
For example, referring to table five, linear interpolation is performed using ReCom _ GamR5 _5_reg, reCom _ GamG5_reg, reCom _ GamB5 _5_reg, and GamR4 _4_reg, gamG4_reg, gamB4_reg, and the corresponding luminance. And similarly, completing Gamma interpolation between the Gamma_Bh1 and the Gamma_Bh2.
In this embodiment, the brightness adjustment method realizes that two groups of preset gamma nodes can complete gamma interpolation corresponding to different gray scale indexes based on the normalization principle, so as to solve the problem that multi-gamma interpolation cannot be switched with a display mode or an application scene.
In one embodiment, the mapping formula of brightness and gray scale in the brightness adjustment method is:
LVi5＝LV5*(GRAY/GRAYmax)^A；
wherein LV5 is the maximum brightness, GRAY is the GRAY scale value, GRAYmax is the maximum GRAY scale value, A is the second GRAY scale index, LVi is the theoretical brightness.
Referring to fig. 2 and table one in combination, illustratively, adjacent gamma_bh4 and gamma_bh5 have different gray scale indexes, and interpolation of the Seg4 region is performed by taking adjacent gamma_bh4 and gamma_bh as examples.
(1) The gray scale index corresponding to Gamma_Bh4 is Gamma1.8, and the gray scale index corresponding to Gamma_Bh5 is Gamma2.2. And (3) finishing correction of preset Gamma_Bh1 to 6, arranging all brightness and registers in 6 groups of preset Gamma nodes according to the sequence of brightness from low to high to form a brightness and register comparison table, performing linear interpolation on adjacent registers and corresponding brightness, expanding the width of the table, and finally obtaining 1024 brightness and corresponding Gamma register values in the table.
(2) And converting the gray scale index of Gamma_Bh5 from Gamma1.8 to Gamma2.2 for recombination. Maximum luminance LV5 = 10nits corresponding to gamma_bh5, which will be according to the mapping formula of luminance and gray scale: LVi5 =lv5 (GRAY/GRAYmax)/(2.2) calculates the theoretical brightness corresponding to each GRAY level.
(3) Table V is a comparison table of the gray scale and theoretical brightness after Gamma_Bh5 correction and the register value. Referring to Table five, only the comparison between a part of gray scale and the theoretical brightness is shown. For Gamma_Bh5, reCom _ GamR5 _5_reg is the corrected red component register value, reCom _ GamG5 _5_reg is the corrected green component register value, reCom _ GamB5_reg is the corrected green component register value. For Gamma_Bh4, gamR4 _4_reg is the red component register value, gamG4 _4_reg is the green component register value, gamB4_reg is the blue component register value. LVi5 finds the register value corresponding to each theoretical luminance in the luminance and register table in step (1) to generate a corrected gamma register value.
(4) Gamma interpolation was performed using ReCom _ GamR5_reg, reCom _ GamG5_reg, reCom _ GamB5 _5_reg shown in table five, with corresponding luminances lv4=50 nits, lv5=10 nits. Similarly, seg2 region interpolation may be accomplished. The normalization process is shown in an important point of the application, and the gamma interpolation step is not repeated here.
TABLE five
In an embodiment, the brightness adjustment method further includes:
s60: and performing gamma interpolation on a plurality of adjacent two groups of preset gamma nodes with the same brightness voltage domain, data voltage domain and gray scale index to obtain gamma values and corresponding brightness of the plurality of adjacent two groups of preset gamma nodes, wherein the gamma values and the corresponding brightness are used as a plurality of interpolation results.
In an exemplary embodiment, when the brightness voltage, the data voltage, and the gray scale index of the two adjacent sets of preset gamma nodes are the same, the gamma node interpolation is performed between the two adjacent sets of preset gamma nodes according to the gamma register value and the corresponding brightness to generate a plurality of interpolation results.
S51: combining the plurality of interpolation results with the first interpolation result, the second interpolation result and the third interpolation result to generate a brightness dimming curve.
Fig. 3 is a graph of the brightness dimming curve based on fig. 2.
Referring to fig. 2 and 3 in combination, interpolation of the remaining Seg regions is accomplished according to the principles described above. And according to the fact that the adjacent Gamma_Bh voltage parameters at the two ends of the Seg3 area are identical to the gray scale index, interpolation is directly completed by utilizing a Gamma register and corresponding brightness to generate a brightness dimming curve. And measuring the flatness of the brightness dimming curve, and determining whether the flatness is the same as expected.
In another aspect, the present application also provides a storage medium, in particular, a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the brightness adjustment method as described above.
As described above, the brightness adjustment method and the storage medium provided by the application are used for mapping a group of preset Gamma values with a smaller voltage range into a group with a larger voltage range based on a voltage normalization principle according to different VGSPs for the Gamma (Gamma) to be interpolated, and finding a new group of Gamma values by a table look-up method. The new two sets of gamma values correspond to the same VGSP. Thus, interpolation can be completed through the calculated gamma value and the corresponding brightness relation; aiming at the gamma which is preset and needs interpolation, the two groups of gamma values are corresponding to different ELVSS, and the corresponding brightness is found under the same ELVSS condition based on the voltage normalization principle. Thus, interpolation can be completed through the gamma value and the newly found brightness relation; aiming at the gamma values which are preset and need to be interpolated, different gamma brightness-gray scale relations are corresponding, and based on a voltage normalization principle, a new gamma value is obtained by a table look-up method, so that the brightness-gray scale relations corresponding to two groups of gamma values which need to be interpolated are the same. Interpolation is accomplished with the newly calculated gamma value and the corresponding luminance relationship.
In the present application, step numbers such as S10 and S20 are used for the purpose of more clearly and briefly describing the corresponding contents, and are not to constitute a substantial limitation on the sequence, and those skilled in the art may execute S20 first and then S10 in the specific implementation, which are all within the scope of the present application.
In the embodiments of the storage medium provided by the present application, all technical features of any one of the embodiments of the method may be included, and the expansion and explanation of the description are substantially the same as those of each embodiment of the method, which is not repeated herein.
Embodiments of the present application also provide a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method as in the various possible embodiments described above.
The embodiment of the application also provides a chip, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that the device provided with the chip executes the method in the various possible implementation manners.
It can be understood that the above scenario is merely an example, and does not constitute a limitation on the application scenario of the technical solution provided by the embodiment of the present application, and the technical solution of the present application may also be applied to other scenarios. For example, as one of ordinary skill in the art can know, with the evolution of the system architecture and the appearance of new service scenarios, the technical solution provided by the embodiment of the present application is also applicable to similar technical problems.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.
The units in the device of the embodiment of the application can be combined, divided and deleted according to actual needs.
In the present application, the same or similar term concept, technical solution and/or application scenario description will be generally described in detail only when first appearing and then repeatedly appearing, and for brevity, the description will not be repeated generally, and in understanding the present application technical solution and the like, reference may be made to the previous related detailed description thereof for the same or similar term concept, technical solution and/or application scenario description and the like which are not described in detail later.
In the present application, the descriptions of the embodiments are emphasized, and the details or descriptions of the other embodiments may be referred to.
The technical features of the technical scheme of the application can be arbitrarily combined, and all possible combinations of the technical features in the above embodiment are not described for the sake of brevity, however, as long as there is no contradiction between the combinations of the technical features, the application shall be considered as the scope of the description of the application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (6)

1. A brightness adjustment method, comprising:
determining a brightness dimming architecture, and respectively acquiring a data voltage domain, a brightness voltage domain and a gray scale index of a plurality of groups of preset gamma nodes;
Performing first gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different data voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same data voltage domain, wherein the gamma values and the corresponding brightness are used as a first interpolation result;
performing second gamma interpolation on two adjacent groups of preset gamma nodes corresponding to different brightness voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same brightness voltage domain, wherein the gamma values and the corresponding brightness are used as second interpolation results;
Performing third gamma interpolation on two adjacent groups of preset gamma nodes with different corresponding gray scale indexes to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same gray scale index domain, wherein the gamma values and the corresponding brightness are used as a third interpolation result;
acquiring a brightness dimming curve according to the first interpolation result, the second interpolation result and the third interpolation result;
the preset gamma nodes comprise adjacent first preset gamma nodes and second preset gamma nodes; the step of performing first gamma interpolation on two adjacent groups of preset gamma nodes with different corresponding data voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same data voltage domain, wherein the step of serving as a first interpolation result comprises the following steps of:
Acquiring a first mapping table of gamma register values and data voltages of the first preset gamma nodes according to a mapping formula of the data voltages and the registers, and acquiring a second mapping table of gamma register values and data voltages of the second preset gamma nodes according to a mapping formula of the data voltages and the registers, wherein a data voltage domain of the first preset gamma nodes is larger than a data voltage domain of the second preset gamma nodes;
according to the second mapping table, acquiring data voltages respectively corresponding to a red component register value, a green component register value and a blue component register value in each gray level of a second preset gamma node;
According to the first mapping table and the data voltage, respectively obtaining a corrected red component register value corresponding to the red component register value, a corrected green component register value corresponding to the green component register value and a corrected blue component register value corresponding to the blue component register value;
The step of respectively obtaining the corrected red component register value corresponding to the red component register value, the corrected green component register value corresponding to the green component register value, and the corrected blue component register value corresponding to the blue component register value according to the first mapping table and the data voltage includes:
acquiring a red component register value, a green component register value and a blue component register value in each gray level of the first preset gamma node, and performing linear gamma interpolation between the first preset gamma node and the second preset gamma node according to the corrected red component register value, the corrected green component register value and the corrected blue component register value in each gray level of the second preset gamma node to generate a first interpolation result;
the preset gamma nodes comprise a third preset gamma node and a fourth preset gamma node which are adjacent to each other; the step of performing a second gamma interpolation on two adjacent groups of preset gamma nodes with different corresponding brightness voltage domains to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same brightness voltage domain, wherein the step of obtaining the second interpolation result comprises the following steps:
acquiring a first brightness voltage and a first brightness of the third preset gamma node, and acquiring a second brightness voltage and a second brightness of the fourth preset gamma node;
Acquiring third brightness of the third preset gamma node under the second brightness voltage, and acquiring fourth brightness of the fourth preset gamma node under the first brightness voltage;
Acquiring the brightness corresponding to each brightness voltage in the third preset gamma node from the first brightness voltage to the second brightness voltage according to a mapping formula of the first brightness voltage and the brightness, and acquiring the brightness corresponding to each brightness voltage in the fourth preset gamma node from the first brightness voltage to the second brightness voltage according to a mapping formula of the second brightness voltage and the brightness;
Performing linear gamma interpolation between the third preset gamma node and the fourth preset gamma node according to the brightness corresponding to the third preset gamma node and the brightness corresponding to the fourth preset gamma node under the same brightness voltage to generate a second interpolation result;
The preset gamma nodes comprise a fifth preset gamma node and a sixth preset gamma node which are adjacent; and performing third gamma interpolation on two adjacent groups of preset gamma nodes with different corresponding gray scale indexes to obtain gamma values and corresponding brightness of the two adjacent groups of preset gamma nodes under the same gray scale index domain, wherein the step of taking the gamma values and the corresponding brightness as a third interpolation result comprises the following steps of:
Obtaining the maximum brightness, the first gray scale index and the maximum gray scale value of the fifth preset gamma node, obtaining the second gray scale index of the sixth preset gamma node, and converting the first gray scale index of the fifth preset gamma node into the second gray scale index;
obtaining theoretical brightness corresponding to each gray level of a fifth preset gamma node according to a mapping formula of brightness and gray level, and determining a corrected red component register value, a corrected green component register value and a corrected blue component register value corresponding to the theoretical brightness according to a brightness and register comparison table;
And obtaining a red component register value, a green component register value and a blue component register value in each gray level of the sixth preset gamma node, and performing linear gamma interpolation between the fifth preset gamma node and the sixth preset gamma node according to the corrected red component register value, the corrected green component register value and the corrected blue component register value in each gray level of the fifth preset gamma node to generate the third interpolation result.
2. The brightness adjustment method of claim 1, wherein the mapping formula of the data voltage and the register is:
Vg＝VGMP-[Ga_num*(VGMP-VGSP)/Ga_with]；
Wherein VGMP is a maximum data voltage, VGSP is a minimum data voltage, ga_width is a gamma node width, ga_num is a gamma register value, and Vg is a data voltage.
3. The brightness adjustment method of claim 1 wherein the first brightness voltage to brightness mapping formula is:
LV3i＝(ELVSSi-ELVSS2)*[(LV1-LV3)/(ELVSS1-ELVSS2)]+LV3；
the mapping formula of the second brightness voltage and brightness is as follows:
LV4i＝(ELVSSi-ELVSS2)*[(LV4-LV2)/(ELVSS1-ELVSS2)]+LV2；
Wherein ELVSS1 is a first luminance voltage, ELVSS2 is a second luminance voltage, LV1 is a first luminance, LV3 is a third luminance, LV2 is a second luminance, LV4 is a fourth luminance, ELVSSi is a luminance voltage from the first luminance voltage to the second luminance voltage, LV3i is a luminance of the third preset gamma node under ELVSSi, and LV4i is a luminance of the fourth preset gamma node under ELVSSi.
4. The method of claim 1, wherein the formula of the luminance-to-gray scale mapping is:
LVi5＝LV5*(GRAY/GRAYmax)^A；
wherein LV5 is the maximum brightness, GRAY is the GRAY scale value, GRAYmax is the maximum GRAY scale value, A is the second GRAY scale index, LVi is the theoretical brightness.
5. The brightness adjustment method according to any one of claims 1 to 4, further comprising:
Performing linear gamma interpolation on a plurality of adjacent two groups of preset gamma nodes with the same brightness voltage domain, data voltage domain and gray scale index to obtain gamma values and corresponding brightness of the plurality of adjacent two groups of preset gamma nodes, and taking the gamma values and the corresponding brightness as a plurality of interpolation results;
Combining the plurality of interpolation results with the first interpolation result, the second interpolation result and the third interpolation result to generate a brightness dimming curve.
6. A storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the brightness adjustment method according to any of claims 1-5.
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