CN106782429A - Eliminate the method and device of screen inhomogeneities - Google Patents

Eliminate the method and device of screen inhomogeneities Download PDF

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Publication number
CN106782429A
CN106782429A CN201611264654.0A CN201611264654A CN106782429A CN 106782429 A CN106782429 A CN 106782429A CN 201611264654 A CN201611264654 A CN 201611264654A CN 106782429 A CN106782429 A CN 106782429A
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color gamut
gtg
common color
triangle
compensation coefficient
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CN106782429B (en
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田广
王中琦
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Huaya Microelectronics Shanghai Inc
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Huaya Microelectronics Shanghai Inc
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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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • 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
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/026—Control of mixing and/or overlay of colours in general
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

The application provides a kind of method and device for eliminating screen inhomogeneities, according to the test pattern of several GTG series, generates the comprehensive compensation coefficient of every sub-regions under each GTG series, obtains comprehensive compensation coefficient sets.Then for a specific pixel to be compensated, after the GTG series and target subregion for determining pixel to be compensated, according to GTG number of stages mark subregion and comprehensive compensation coefficient sets, target comprehensive compensation coefficient is determined, then according to target comprehensive compensation compensating coefficient pixel to be compensated.In comprehensive compensation coefficient generating process, consider to consider monochrome information while chrominance information, therefore, when treating compensation pixel using comprehensive compensation coefficient and compensating, the compensation of brightness mura can be taken into account while compensation colourity mura, colour gamut coverage can to the full extent be ensured, realize on the premise of colour gamut coverage is ensured, eliminating colourity mura and brightness mura.

Description

Eliminate the method and device of screen inhomogeneities
Technical field
The invention relates to Display Technique, more particularly to a kind of method and device for eliminating screen inhomogeneities.
Background technology
When mura defects refer to that display works, what is occurred on display panel shows uneven phenomenon.Mura defects are produced Raw the reason for, includes circuit defect, construction defect, material property, process water equality.Under normal circumstances, mura defects include brightness Mura and colourity mura.Wherein, brightness mura refers to that the brightness of display panel different zones has differences, and causes light and shade inequality occur Problem；Colourity mura refers to that the colourity of display panel different zones is inconsistent, the phenomenon of colour cast occurs.
At present for mura defects, brightness mura is mainly eliminated.During brightness mura is eliminated, according on display panel The distributed intelligence of luminance defects, penalty coefficient table is generated using backoff algorithm.When display panel works, to the picture on relevant position Element is compensated, so as to eliminate the defect in brightness, improves display effect.
Further to lift the quality of display panel, it is necessary to eliminate colourity mura.When being eliminated to colourity mura, if after It is continuous to use above-mentioned compensation way, then while improving color homogeneity, the reduction of integral color saturation degree can be caused, and then lead The reduction of coloring domain space coverage.However, in the R＆D direction of display panel, be devoted to improving display panel three primary colours, I.e. the color purity of RGB (Red GreenBlue, RGB), lifts color gamut space coverage.Obviously, above-mentioned elimination colourity The mode of mura, contradicts with lifting color gamut space coverage.
The content of the invention
The embodiment of the present application provides a kind of method and device for eliminating screen inhomogeneities, is ensureing colour gamut coverage Under the premise of, colourity mura and brightness mura are eliminated.
In a first aspect, the embodiment of the present application provides a kind of method for eliminating screen inhomogeneities, including：
For each test pattern at least one test pattern of different GTG series, described screen display survey is obtained Attempt the monochromatic whole field information of card, the monochromatic whole field information includes monochrome information and chrominance information；
Sub- chrominance information and sub- monochrome information in the screen according to the monochromatic whole field acquisition of information per sub-regions；
Every sub-regions in the screen, according to the sub- chrominance information of the subregion, determine the colour gamut of the subregion Triangle；
Judge that the colour triangle of every sub-regions of the screen whether there is common color gamut triangle；
When there is common color gamut triangle, for every sub-regions, according to the common color gamut triangle and the son The colour triangle in region, the sub- chrominance information of the subregion and sub- monochrome information, generate the comprehensive compensation coefficient of the subregion, Comprehensive compensation coefficient according to each sub-regions obtains comprehensive compensation coefficient sets；
GTG series, target subregion and the comprehensive compensation coefficient sets according to pixel to be compensated, determine target Comprehensive compensation coefficient, the target subregion is the subregion comprising the pixel to be compensated on the screen；
According to the target comprehensive compensation coefficient, colourity and luminance compensation are carried out to the pixel to be compensated.
It is described according to the target comprehensive compensation coefficient in a kind of feasible implementation, to the pixel to be compensated Colourity and luminance compensation are carried out, including：
Determine the saturation degree of the pixel to be compensated；
When the saturation degree is not less than the predetermined threshold value, the luminance compensation coefficient of the target subregion is determined；
According to the luminance compensation coefficient and the target comprehensive compensation coefficient, the pixel to be compensated is carried out colourity and Luminance compensation.
In a kind of feasible implementation, whether the colour triangle of the every sub-regions for judging the screen deposits In common color gamut triangle, including：
The colour triangle of all subregion according to the screen determines the first vertex set, the second vertex set and the 3rd Vertex set, the element in first vertex set is the red component for characterizing the common color gamut triangle to be selected Summit, the element in second vertex set is the top for characterizing the green component of the common color gamut triangle to be selected Point, the element in the 3rd vertex set is the summit for characterizing the blue component of the common color gamut triangle to be selected；
The number of first vertex set, second vertex set and element in the 3rd vertex set is determined respectively Amount；
If the number of elements at least one set is zero, confirm do not exist the common color gamut triangle；
If the number of elements in each set is 1, by first vertex set, second vertex set and institute Three summits of the element in the 3rd vertex set respectively as the common color gamut triangle are stated, so as to obtain the public color Domain triangle；
If the quantity of the element at least one set is more than 1, according to first vertex set, second summit Element in set and the 3rd vertex set, obtains at least two common color gamut triangles to be selected, from described at least two The common color gamut triangle is determined in common color gamut triangle to be selected.
It is described to determine institute from described at least two common color gamut triangles to be selected in a kind of feasible implementation Common color gamut triangle is stated, including：
In determining described at least two common color gamut triangles to be selected, the area of each common color gamut triangle to be selected and top The departure degree of point, and determine the high-high brightness of all subregion of the screen under white field colourity；
It is to be selected to this for each the common color gamut triangle to be selected in described at least two common color gamut triangles to be selected The area of function colour triangle, the departure degree on summit and under white field colourity all subregion of the screen high-high brightness Treatment is weighted, weighted results are obtained；
Optimal weighted results are determined from all weighted results, will be corresponding with optimal weighted results to be selected public Colour triangle is used as the common color gamut triangle.
In a kind of feasible implementation, all subregion of the screen is most light under the white field colourity of determination Degree, including：
For each the common color gamut triangle to be selected in described at least two common color gamut triangles to be selected, it is determined that described The high-high brightness on each summit of common color gamut triangle to be selected；
Judge whether the white field colourity of the screen falls within the common color gamut triangle to be selected；
When the white field colourity of the screen falls within the common color gamut triangle to be selected, from the common color gamut triangle to be selected Determine maximum in the high-high brightness on each summit of shape, using the maximum as the screen under white field colourity each son The high-high brightness in region.
In a kind of feasible implementation, the GTG series according to pixel to be compensated, target subregion and institute Comprehensive compensation coefficient sets are stated, target comprehensive compensation coefficient is determined, including：
The corresponding GTG series of at least one test pattern according to the different GTG series, obtains GTG set；
When the GTG series of the pixel to be compensated belongs to the GTG set, according to where the pixel to be compensated Target subregion, the target comprehensive compensation coefficient is determined from the corresponding multiple comprehensive compensation coefficients of the GTG series.
In a kind of feasible implementation, above-mentioned method also includes:When the pixel to be compensated GTG series not When belonging to the GTG set, the first GTG series and the second GTG series are obtained, the first GTG series is less than described The GTG series of target subregion, GTG series of the second GTG series more than the target subregion；
Determine the first comprehensive compensation coefficient and the second comprehensive compensation coefficient, the first comprehensive compensation coefficient is described first The comprehensive compensation coefficient of the target subregion under GTG series, the second comprehensive compensation coefficient is the second GTG series Under the target subregion comprehensive compensation coefficient；
According to the first comprehensive compensation coefficient and the second comprehensive compensation coefficient, the target comprehensive compensation system is determined Number.
Second aspect, the embodiment of the present application provides a kind of device for eliminating screen inhomogeneities, including：
Acquisition module, for each test pattern at least one test pattern for different GTG series, obtains institute The monochromatic whole field information of the screen display test pattern is stated, the monochromatic whole field information includes monochrome information and chrominance information, with And sub- chrominance information and sub- monochrome information in the screen according to the monochromatic whole field acquisition of information per sub-regions；
Processing module, for the every sub-regions in the screen, according to the sub- chrominance information of the subregion, it is determined that should The colour triangle of subregion, and judge that the colour triangle of every sub-regions of the screen whether there is common color gamut three It is angular；
Generation module, for when the processing module judges to exist common color gamut triangle, for every sub-regions, The sub- chrominance information of colour triangle, the subregion according to the common color gamut triangle and the subregion and sub- brightness are believed Breath, generates the comprehensive compensation coefficient of the subregion, and the comprehensive compensation coefficient according to each sub-regions obtains comprehensive compensation coefficient set Close；
Compensating module, for the GTG series according to pixel to be compensated, target subregion and the comprehensive compensation coefficient Set, determines target comprehensive compensation coefficient, and the target subregion is the sub-district comprising the pixel to be compensated on the screen Domain；And according to the target comprehensive compensation coefficient, colourity and luminance compensation are carried out to the pixel to be compensated.
In a kind of feasible implementation, the compensating module, according to the target comprehensive compensation coefficient, to described When pixel to be compensated carries out brightness and chromatic compensation, the saturation degree specifically for determining the pixel to be compensated；When the saturation When degree is not less than the predetermined threshold value, the luminance compensation coefficient of the target subregion is determined；According to the luminance compensation coefficient With the target comprehensive compensation coefficient, colourity and luminance compensation are carried out to the pixel to be compensated..
In a kind of feasible implementation, the processing module, in the colour gamut of the every sub-regions for judging the screen When triangle whether there is common color gamut triangle, the colour triangle specifically for all subregion according to the screen determines First vertex set, the second vertex set and the 3rd vertex set, the element in first vertex set is for characterizing The summit of the red component of common color gamut triangle to be selected is stated, the element in second vertex set is for characterizing described treating The summit of the green component of common color gamut triangle is selected, the element in the 3rd vertex set is for characterizing the public affairs to be selected The summit of the blue component of common colour triangle；Determine respectively first vertex set, second vertex set with it is described The quantity of element in 3rd vertex set；If the number of elements at least one set is zero, confirm in the absence of described public Colour triangle；If the number of elements in each set is 1, by first vertex set, second vertex set Collect three summits of the element during summit is closed respectively as the common color gamut triangle with the described 3rd, so as to obtain the public affairs Common colour triangle；If the quantity of the element at least one set is more than 1, according to first vertex set, described the Element in two vertex sets and the 3rd vertex set, obtains at least two common color gamut triangles to be selected, from it is described to The common color gamut triangle is determined in few two common color gamut triangles to be selected.
In a kind of feasible implementation, the processing module, from described at least two common color gamut triangles to be selected When the common color gamut triangle is determined in shape, specifically for determining at least two common color gamut triangle to be selected in, The area of each common color gamut triangle to be selected and the departure degree on summit, and determine each sub-district of the screen under white field colourity The high-high brightness in domain；It is right for each the common color gamut triangle to be selected in described at least two common color gamut triangles to be selected The area of the function colour triangle to be selected, the departure degree on summit and under white field colourity the screen all subregion most Big brightness is weighted treatment, obtains weighted results；Optimal weighted results are determined from all weighted results, will with it is optimal The corresponding common color gamut triangle to be selected of weighted results as the common color gamut triangle.
In a kind of feasible implementation, the processing module, it is determined that under white field colourity the screen each sub-district During the high-high brightness in domain, specifically for for each common color gamut to be selected in described at least two common color gamut triangles to be selected Triangle, determines the high-high brightness on each summit of the common color gamut triangle to be selected；Judge the white field colourity of the screen Whether the to be selected common color gamut triangle is fallen within；When the white field colourity of the screen falls within the common color gamut triangle to be selected, Maximum is determined from the high-high brightness on each summit of the common color gamut triangle to be selected, using the maximum as white The high-high brightness of all subregion of the screen under the colourity of field.
In a kind of feasible implementation, the compensating module, in the GTG series according to pixel to be compensated, the mesh Mark subregion and the comprehensive compensation coefficient sets, when determining target comprehensive compensation coefficient, specifically for according to the difference The corresponding GTG series of at least one test pattern of GTG series, obtains GTG set；When the GTG of the pixel to be compensated When series belongs to the GTG set, determine that the corresponding multiple of GTG series is comprehensive from the GTG comprehensive compensation coefficient sets Close penalty coefficient, the target subregion according to where the pixel to be compensated, from the corresponding multiple comprehensive benefits of the GTG series Repay and determine the target comprehensive compensation coefficient in coefficient.
In a kind of feasible implementation, the compensating module is additionally operable to the GTG series when the pixel to be compensated When being not belonging to the GTG set, the first GTG series and the second GTG series are obtained, the first GTG series is less than institute State the GTG series of target subregion, GTG series of the second GTG series more than the target subregion；And determine First comprehensive compensation coefficient and the second comprehensive compensation coefficient, the first comprehensive compensation coefficient are institute under the first GTG series The comprehensive compensation coefficient of target subregion is stated, the second comprehensive compensation coefficient is target under the second GTG series The comprehensive compensation coefficient in region；According to the first comprehensive compensation coefficient and the second comprehensive compensation coefficient, the target is determined Comprehensive compensation coefficient.
The method and device of the elimination screen inhomogeneities that the embodiment of the present application is provided, according to the survey of several GTG series Attempt card, generate the comprehensive compensation coefficient of every sub-regions under each GTG series, obtain comprehensive compensation coefficient sets.Then it is right In a specific pixel to be compensated, comprising the picture to be compensated on the GTG series and screen for determine pixel to be compensated The subregion of element, i.e., after target subregion, determine target comprehensive compensation coefficient, then from the comprehensive compensation coefficient sets According to target comprehensive compensation compensating coefficient pixel to be compensated.During being somebody's turn to do, GTG series is different, the same subregion on screen Comprehensive compensation coefficient is different, and/or, the comprehensive compensation coefficient of GTG series identical difference subregion is different, and comprehensive compensation In coefficient generating process, it is considered to monochrome information is considered while chrominance information, therefore, using comprehensive compensation coefficient to be compensated When pixel is compensated, the compensation of brightness mura can be taken into account while compensation colourity mura, can ensured to the full extent Colour gamut coverage, realizes on the premise of colour gamut coverage is ensured, eliminating colourity mura and brightness mura.
Brief description of the drawings
Fig. 1 is the flow chart of the embodiment of the method one that the application eliminates screen inhomogeneities；
Fig. 2 is the flogic system block diagram of the method that the application eliminates screen inhomogeneities；
Fig. 3 illustrates for the processing procedure of the test pattern in the method for the application elimination screen inhomogeneities to photographing Figure；
Fig. 4 be the application eliminate screen inhomogeneities method in treat the process schematic that compensation pixel is compensated；
Fig. 5 is the schematic diagram of common color gamut triangle in the method for the application elimination screen inhomogeneities；
Fig. 6 is the structural representation of the device embodiment one that the application eliminates screen inhomogeneities.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application In accompanying drawing, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is Some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, those skilled in the art are not having There is the every other embodiment made and being obtained under the premise of creative work, belong to the scope of the application protection.Herein below It is with reference to accompanying drawing and preferred embodiment, to the specific embodiment according to the application, structure, feature and its effect specifically It is bright.
Term " first ", " second ", " the 3rd ", " in the description and claims of this application and above-mentioned accompanying drawing Four " etc. (if present) is for distinguishing similar object, without for describing specific order or precedence.Should manage Solution so data for using can be exchanged in the appropriate case, so that embodiments herein described herein for example can be removing Order beyond those for illustrating herein or describing is implemented.Additionally, term " comprising " and " having " and theirs is any Deformation, it is intended that covering is non-exclusive to be included, for example, containing process, method, system, the product of series of steps or unit Product or equipment are not necessarily limited to those steps clearly listed or unit, but may include not list clearly or for this A little processes, method, product or other intrinsic steps of equipment or unit.
Fig. 1 is the flow chart of the embodiment of the method one that the application eliminates screen inhomogeneities, and the present embodiment includes：
101st, for each test pattern at least one test pattern of different GTG series, the screen display is obtained The monochromatic whole field information of the test pattern, the monochromatic whole field information includes monochrome information and chrominance information.
In this step, select several GTG series such as 16 GTGs, 32 GTGs, 64 GTGs, 128 GTGs, 192 GTGs or 255 GTGs etc., by red, green, blue and white (Red Green Blue White, RGBW) monochromatic whole field information of those GTGs as test Graph card.For the test pattern of each GTG series, the monochromatic whole field information of the test pattern is obtained.For example, selected gray scale levels Number includes 32 GTGs, then obtain monochrome information and chrominance information, the monochrome information and colourity of the green field of 32 GTGs of 32 GTG Red Square Information, the monochrome information and the monochrome information and chrominance information of chrominance information and the white field of 32 GTGs of 32 GTGs indigo plant field.
102nd, the sub- chrominance information in the screen according to the monochromatic whole field acquisition of information per sub-regions and sub- brightness Information.
In this step, monochromatic whole field information carries out piecemeal treatment.Specifically, being expert at on column direction, screen is divided into Multiple sub-blocks, form subregion, and dividing mode can be set according to demand.Then, for a specific GTG series, according to the ash Monochromatic whole field information under class number, extracts the sub- chrominance information and sub- monochrome information of each sub-regions.
103rd, to the screen in every sub-regions, according to the sub- chrominance information of the subregion, determine the subregion Colour triangle.
In this step, for every sub-regions, according to the sub- chrominance information of the subregion, such as sub- chrominance information in Red Square, green Ground chrominance information and blue ground chrominance information, determine the colour triangle of the subregion, for a specific gray scale levels Number, gets the colour triangle of each sub-regions under the GTG series.
104th, the colour triangle of every sub-regions of the screen is judged with the presence or absence of common color gamut triangle, if so, Then perform step 105；If it is not, then performing step 108.
In above-mentioned steps 104, common color gamut triangle refers to the triangle inside the colour triangle of each sub-regions Shape.
105th, for every sub-regions, colour triangle according to the common color gamut triangle and the subregion, should The sub- chrominance information and sub- monochrome information of subregion, generate the comprehensive compensation coefficient of the subregion, according to the comprehensive of each sub-regions Close penalty coefficient and obtain comprehensive compensation coefficient sets.
When the colour triangle of every sub-regions of screen has common color gamut triangle, for every sub-regions, root It is raw according to the colour triangle of common color gamut triangle and the subregion, the sub- chrominance information of the subregion and sub- monochrome information Into the comprehensive compensation coefficient of the subregion.After obtaining the comprehensive compensation coefficient of every sub-regions, by all of comprehensive compensation system Number is stored together, and obtains comprehensive compensation coefficient sets.
Colourity is represented with (x, y), brightness is represented with Y, by taking 32 GTG series as an example, it is assumed that the red field of a sub-regions Sub- chrominance information and sub- monochrome information are expressed as (x is red, and y is red, and Y is red), and the sub- chrominance information and sub- monochrome information of green field are represented It is (x is green, and y is green, and Y is green) that the sub- chrominance information and sub- monochrome information of blue field are expressed as (x is blue, and y is blue, and Y is blue), common color gamut three Three angular summits are respectively R summits, G summits and B summits, and the chrominance information and monochrome information on three summits are represented successively For R (x_std is red, and y_std is red, and Y_std is red), G (x_std is green, and y_std is green, and Y_std is green) and B, (x_std is blue, and y_std is blue, Y_ Std is blue), then：
For R summits, equation can be obtained as follows：
X is red × and the red+x of k1_ are green × red+x indigo plants × k3_ of k2_ are red=and x_std is red；
Y is red × and the red+y of k1_ are green × red+y indigo plants × k3_ of k2_ are red=and y_std is red；
Y is red × and the red+Y of k1_ are green × red+Y indigo plants × k3_ of k2_ are red=and Y_std is red；
According to three equations, can obtain that k1_ is red, k2_ is red and k3_ is red, then k1_ is red, k2_ is red and k3_ it is red be the son The comprehensive compensation coefficient of Regional Red.
Similarly, for G summits, equation can be obtained as follows：
X is red × and the green+x of k1_ are green × green+x indigo plants × k3_ of k2_ are green=and x_std is green；
Y is red × and the green+y of k1_ are green × green+y indigo plants × k3_ of k2_ are green=and y_std is green；
Y is red × and the green+Y of k1_ are green × green+Y indigo plants × k3_ of k2_ are green=and Y_std is green；
According to three equations, can obtain that k1_ is green, k2_ is green and k3_ is green, then k1_ is green, k2_ is green and k3_ it is green be the son The comprehensive compensation coefficient of region green field.
Similarly, for B summits, equation can be obtained as follows：
X is red × and k1_ indigo plants+x is green × and k2_ indigo plants+x indigo plants × k3_ indigo plants=x_std is blue；
Y is red × and k1_ indigo plants+y is green × and k2_ indigo plants+y indigo plants × k3_ indigo plants=y_std is blue；
Y is red × and k1_ indigo plants+Y is green × and k2_ indigo plants+Y indigo plants × k3_ indigo plants=Y_std is blue；
According to three equations, k1_ blue, k2_ indigo plants and k3_ indigo plants can be obtained, then k1_ is blue, k2_ is blue and k3_ is blue for the son The comprehensive compensation coefficient of region blue field.
According to above-mentioned, 9 comprehensive compensation coefficients are obtained, i.e. k1_ is red, and k2_ is red, and k3_ is red, and k1_ is green, and k2_ is green, and k3_ is green, K1_ is blue, and k2_ is blue, and k3_ is blue, and 9 comprehensive compensation coefficients are the comprehensive compensation of the next specific subregion of 32 GTG series Coefficient.
Afterwards, in the same way, generation 32 GTG series under its subregion summation penalty coefficient.For other ashes Class number, the generating mode of comprehensive compensation coefficient is identical with the generating mode of the summation penalty coefficient of 32 GTG series.
It can be seen from mode according to above-mentioned generation comprehensive compensation coefficient：In comprehensive compensation coefficient generating process, it is considered to sub- colourity Sub- monochrome information is considered while information, therefore, the comprehensive compensation coefficient obtained using which, to colourity mura compensation The compensation of brightness mura can be taken into account simultaneously.
It is understood that for each GTG series, in comprehensive compensation coefficient sets, there is under the GTG series each The penalty coefficient of sub-block.
106th, according to the pixel to be compensated GTG series, target subregion and the comprehensive compensation coefficient sets, Determine target comprehensive compensation coefficient.
After comprehensive compensation coefficient sets are generated, for any one pixel to be compensated in the picture of display on screen, Determine on the GTG series of the pixel to be compensated, the i.e. described screen of target subregion the subregion comprising the pixel to be compensated and Comprehensive compensation coefficient sets, determine the target comprehensive compensation coefficient for compensating the pixel to be compensated.
For example, there are the corresponding multiple comprehensive compensation coefficients of GTG series in working as comprehensive compensation coefficient sets, and it is the plurality of There is the comprehensive compensation coefficient of target subregion in comprehensive compensation coefficient, then using the comprehensive compensation coefficient as target comprehensive compensation Coefficient.
For another example, when the GTG series of the pixel to be compensated is not belonging to the GTG set, the first GTG series is determined And the second GTG series；Determine the first comprehensive compensation coefficient and the second comprehensive compensation coefficient, the first comprehensive compensation coefficient Under for the first GTG series, the comprehensive compensation coefficient of the target subregion, the second comprehensive compensation coefficient is described Under second GTG series, the comprehensive compensation coefficient of the target subregion, the first GTG series is less than the target sub-district The GTG series in domain, GTG series of the second GTG series more than the target subregion；According to the described first comprehensive benefit Coefficient and the second comprehensive compensation coefficient are repaid, the target comprehensive compensation coefficient is determined.During being somebody's turn to do, the first GTG series, mesh The GTG series for marking subregion is referred to as adjacent GTG series with the second GTG series.
And for example, when the GTG series of the pixel to be compensated is not belonging to the GTG set, also in the absence of target sub-district During the comprehensive compensation coefficient in domain, then by the method for bilinear interpolation, the comprehensive compensation coefficient of target subregion is rebuild.
107th, according to the target comprehensive compensation coefficient, colourity and luminance compensation are carried out to the pixel to be compensated, is terminated Flow.
108th, treating compensation pixel carries out luminance compensation.
It is right according to existing brightness mura compensation ways during in the absence of common color gamut triangle in this step Pixel to be compensated carries out luminance compensation.
The method of the elimination screen inhomogeneities that the embodiment of the present application is provided, according to the test chart of several GTG series Card, generates the comprehensive compensation coefficient of every sub-regions under each GTG series, obtains comprehensive compensation coefficient sets.Then for one Individual specific pixel to be compensated, comprising the pixel to be compensated on the GTG series and screen for determine pixel to be compensated After subregion, i.e. target subregion, according to GTG number of stages mark subregion and the comprehensive compensation coefficient sets, target is determined Comprehensive compensation coefficient, then according to target comprehensive compensation compensating coefficient pixel to be compensated.During being somebody's turn to do, GTG series is different, screen The comprehensive compensation coefficient of the same subregion on curtain is different, and/or, the comprehensive compensation system of GTG series identical difference subregion Number is different, and in comprehensive compensation coefficient generating process, it is considered to monochrome information is considered while chrominance information, therefore, using comprehensive When closing penalty coefficient and treating compensation pixel and compensate, the compensation of brightness mura can be taken into account while compensation colourity mura, Colour gamut coverage can to the full extent be ensured, realized on the premise of colour gamut coverage is ensured, to colourity mura and brightness Mura is eliminated.
Fig. 2 is the system architecture schematic diagram of the method that the application eliminates screen inhomogeneities, and the system includes：Color analysis Instrument, computer and display device, wherein, color analysis instrument is, for example, two-dimensional color analyzer, is provided with detection module, is shown Show and screen is provided with equipment, computer includes comprehensive compensation coefficients calculation block and control module, control module is used to control Comprehensive compensation coefficients calculation block, detection module and display device, as indicated by a dashed arrow in the figure, detection module, display device There is data transfer and coefficient of colligation computing module between, as shown in solid arrow in figure.Below, on the basis of Fig. 2, to this The method that application eliminates screen inhomogeneities is described in detail.
First, the Integral Thought that the method for screen inhomogeneities is eliminated to the application is illustrated.
Specifically, control module manipulates display device to be detected carries out the display of test pattern successively on screen, i.e., Red, green, blue and white (Red Green Blue White, RGBW) the monochromatic whole field information under several GTG series is selected as test Graph card, controls the monochromatic whole field information of each test pattern of screen display, for example, selected GTG series includes 32 gray scale levels Number, then show red whole field information, green whole field information, blue whole field information, the Yi Jibai of the test pattern of 32 GTG series The whole field information of color.
When the test pattern of one specific GTG series of screen display, control module sends instruction to detection module, makes Obtain detection module control color analysis instrument to shoot screen, obtain the monochrome information and chrominance information of screen area, then Monochrome information and chrominance information are input to comprehensive compensation coefficients calculation block, by comprehensive compensation coefficients calculation block according to brightness Information and chrominance information, obtain the sub- monochrome information and sub- chrominance information of the every sub-regions in screen area；And then it is right Every sub-regions in screen area, according in the red whole field information of the subregion, green whole field information, blue whole field information Sub- chrominance information, the colour triangle of the subregion is determined, to obtain the colour triangle of every sub-regions；Then according to screen The colour triangle of the every sub-regions in curtain region, colour triangle according to common color gamut triangle and the subregion, The sub- chrominance information and sub- monochrome information of the subregion, generate the comprehensive compensation coefficient of the subregion, according to each sub-regions Comprehensive compensation coefficient obtains comprehensive compensation coefficient sets, so that it is determined that going out under current gray series, the comprehensive benefit per sub-regions Repay coefficient.For the test pattern of other GTG series, said process is performed, so that it is determined that going out under each GTG series, correspondence The comprehensive compensation coefficient of subregion, then under same GTG series, the comprehensive compensation coefficient of different subregion, and different ashes Under class number, the comprehensive compensation coefficient of same subregion stored so as to obtain comprehensive compensation coefficient sets.
During uneven elimination, control module according to the GTG series and target subregion of pixel to be compensated, from depositing Target comprehensive compensation coefficient is determined in the comprehensive compensation coefficient sets of storage, this is to be compensated according to target comprehensive compensation compensating coefficient Pixel.The implementation procedure can be processed by the way of feedback iteration, i.e., treat retrieved image using target comprehensive compensation coefficient After element is compensated, continue to obtain monochrome information and chrominance information, determine common color gamut triangle, and then determine new target Comprehensive compensation coefficient continues to treat compensation pixel and compensates.
Secondly, above-mentioned detection module control color analysis instrument is shot to screen, obtains the brightness letter of screen area The process of breath and chrominance information is described in detail.
Specifically, obtain screen display GTG series test pattern when screen area monochrome information and chrominance information it It is preceding, it is necessary to screen area when first photographed screen shows the test pattern of GTG series.Following thing is should be noted in shooting process ：
Firstth, when being shot using color analysis instrument, optimal situation is that whole screen is got into color just In the view area of color analyzer.However, because the screen width high ratio of display device leads to the ratio of width to height that color analysis instrument is found a view It is often inconsistent.Therefore, it is necessary to be carried out to background information present in photo after photo when photographing display test pattern Reject, so as to extract screen area from photo.
Secondth, the relative position put between display device and color analysis instrument, in color analysis instrument shooting view-finder The influence of the desired level of the mura data (including brightness mura and colourity mura) of the screen area of acquisition is larger.Normal conditions Under, when screen area is parallel with four sides of view-finder, and on the premise of scope no more than view-finder, screen area accounts for view-finder Ratio try one's best it is big under conditions of, the mura data shot are more efficiently.But, this is to display device and color analysis Putting for relative position between instrument requires strictly, to be unfavorable for the application in producing line.
3rd, in practical application scene, comprising the uneven elimination to curve screens, and shooting is carried out to curve screens The screen area for getting afterwards is irregular quadrangle, it is necessary to carry out geometric correction.
In the embodiment of the present application, screen area detection and geometric correction function are integrated with detection module, to photographing The processing procedure of test pattern can be found in Fig. 3, Fig. 3 is that the application eliminates the survey to photographing in the method for screen inhomogeneities Attempt the processing procedure schematic diagram of card, including：
201st, photo during photographed screen display test pattern.
202nd, function, the region where the screen is extracted from shooting area are detected by screen area.
In this step, detection module calls screen area detection function, and geo-stationary is kept in screen and color analysis instrument Under conditions of, photographing information during contrast screen display difference test pattern, according to screen and the different qualities of background area, is carried Region where taking out screen.
203rd, geometric correction is carried out to the region where screen.
In this step, in the case where there is geometric distortion, detection module calls geometric correction function, to the screen for distorting Region is corrected treatment.When there is no geometric distortion, the step need not be performed.
In above-mentioned processing procedure, function and geometric correction function are detected by screen area, reduce screen and color analysis The requirement of the relative putting position between instrument, beneficial to the application in producing line, while also can be compatible to the uneven of curve screens Eliminate.
It should be noted that when test pattern is shot, because changes of the colourity mura between each GTG is present continuously Property, in order to reduce data processing amount, hardware resource cost is reduced, in the embodiment of the present application, it is only necessary to selection it is specific several GTG series, the test pattern to those GTG series shoots, and obtains comprehensive compensation coefficient sets.In compensation process, when When the gray scale levels of pixel to be compensated are scolded between selected GTG series, by using the comprehensive compensation of adjacent selected GTG The mode that coefficient enters row interpolation obtains target comprehensive compensation coefficient.Specifically, for pixel to be compensated, according to pixel to be compensated GTG series and target subregion, when determining target comprehensive compensation coefficient, first determine the first GTG series and the second GTG Series；The first comprehensive compensation coefficient and the second comprehensive compensation coefficient are determined again, and the first comprehensive compensation coefficient is described first Under GTG series, the comprehensive compensation coefficient of the target subregion, the second comprehensive compensation coefficient is second gray scale levels Under several, the comprehensive compensation coefficient of the target subregion；According to the first comprehensive compensation coefficient and the second comprehensive compensation system Number, determines the target comprehensive compensation coefficient, and the first GTG series is less than the GTG series of the target subregion, described GTG series of the second GTG series more than the target subregion.
After by screen area detection and geometric correction, the monochrome information and chrominance information of screen will be input into synthesis Penalty coefficient computing module, is calculated comprehensive compensation coefficient and is treated compensation pixel and mended by comprehensive compensation coefficients calculation block Repay.
Then, the process how comprehensive compensation coefficients calculation block calculates comprehensive compensation coefficient is described in detail.Should Part generally comprises following aspects：
First aspect, Integral Thought.
Specifically, reference can be made to Fig. 4, Fig. 4 are carried out to treat compensation pixel in the method for the application elimination screen inhomogeneities The process schematic of compensation, including:
301st, the monochrome information and chrominance information of entr screen.
302nd, piecemeal processing procedure.
When determining comprehensive compensation coefficient, the monochrome information and chrominance information of the screen area according to input obtain screen The sub- monochrome information and sub- chrominance information of the every sub-regions in region, i.e., to be input into screen area monochrome information and color Degree information carries out piecemeal treatment, and piecemeal treatment is according to the side being expert at sub-zone dividing one by one is carried out on column direction by screen Formula, formed subregion, extract subregion monochrome information and chrominance information (for distinguish for the sake of, by the monochrome information of subregion with Chrominance information is referred to as sub- monochrome information and sub- chrominance information).
303rd, common color gamut triangle is asked for.
In this step, common color gamut is asked for every sub-regions, for each sub-regions, according to common color gamut and should The colour triangle of subregion, obtains the comprehensive compensation coefficient of the subregion, so as to obtain the comprehensive compensation system of every sub-regions Number.
304th, saturation analysis.
In compensation process, for each location of pixels, the target comprehensive compensation coefficient of pixel to be compensated is determined, while to full Calculated with degree, the compensation result of brightness mura and colourity mura is weighted according to saturation degree, obtained final target Comprehensive compensation coefficient.When saturation degree is less than predetermined threshold value, treating compensation pixel using target comprehensive compensation coefficient carries out brightness With the compensation of colourity；When saturation degree is not less than predetermined threshold value, the treatment weight of brightness mura is increased, reduce target comprehensive compensation Coefficient treats compensation pixel and carries out the weight of brightness and chromatic compensation.
305th, pixel to be compensated is compensated.
It is the correspondence because the distribution of colourity mura spatially has continuity by the way of piecemeal in said process Comprehensive compensation coefficient spatially also have continuity, it is possible to by way of interpolation, to the synthesis on each position Penalty coefficient is rebuild.Processed by piecemeal, the resource needed for calculating comprehensive compensation coefficient can be reduced.
Second aspect, ask for subregion colour triangle process.
For every sub-regions, according to the monochrome information and chrominance information of the screen area after correction process, positioning is current The corresponding screen area of subregion, carries out the extraction of sub- monochrome information and sub- chrominance information.For a specific subregion, carry The sub- monochrome information and sub- chrominance information got are designated as (Lv_i, x_i, y_i), wherein, Lv_i is the brightness of the subregion Parameter, (x_i, y_i) is the chromaticity parameter of the subregion.International Commission on Illumination (the Commission for setting up for 1931 Internationale de L'Eclairage, CIE) definition：By chrominance information and monochrome information with " Yxy of CIE 1931 join Number " represents chrominance information and monochrome information, wherein, Lv_i is characterized with Y, (x_i, y_i) is characterized with xy.
For a specific GTG series, the sub- monochrome information of all subregion under the test pattern according to the GTG series With sub- chrominance information, the colour triangle to the subregion asks for.If GTG series is TestValue, then there is each sub-district (x_i, y_i) that domain obtains to test pattern R (TestValue, 0,0), G (0, TestValue, 0), B (0,0, TestValue) Turn into three summits of the colour triangle of current sub-region on a chromaticity diagram respectively, for each pixel in the subregion (R_Input, G_Input, B_Input), when three component values of above RGB are all close to TestValue, its colourity xy Parameter will be distributed within above-mentioned colour triangle.
It should be noted that with the change of GTG series TestValue, three summits of colour triangle on chromatic diagram Would be possible to unknown variations, this is the characteristic decision due to screen in itself.Therefore, pixel (R_Input, G_Input, B_Input) when three components are all close to TestValue, colour triangle more than use is more accurately, with it In certain several component deviate TestValue, the accuracy of above-mentioned colour triangle will decline.And according under RGB test patterns The luminance parameter of all subregion, then can characterize to the brightness of current sub-region.
The third aspect, the process for asking for common color gamut triangle.
For a specific GTG series, the distribution of the colour triangle of each sub-regions is typically different, therefore, need Carry out asking for for common color gamut.Common color gamut refers to：It is common in the colour triangle per sub-regions under current gray series Gamut regions, be target colorimetric region that every sub-regions can be realized, specifically, reference can be made to Fig. 5, Fig. 5 are the application Eliminate the schematic diagram of common color gamut triangle in the method for screen inhomogeneities.
Fig. 5 is refer to, common color gamut triangle is located at the inside of the colour triangle of each sub-regions, thick black reality such as in figure Shown in the triangle of line, and from from the point of view of screen color purity, the area of common color gamut triangle should try one's best big by one A bit.
It is unified to turn by the vertex position of each sub-regions RGB component by conversion after common color gamut triangle is got Shift on three summits of common color gamut triangle, while the uniformity of brightness is taken into account using Lv parameters during conversion, When being input into display identical RGB, the light characteristic of all subregion will make original corresponding to identical (Lv_i, x_i, y_i) parameter The colourity and the difference of brightness for pre-existing are inhibited, and realize the elimination to brightness mura and colourity mura.
In the embodiment of the present application, common color gamut triangle can be in the following way asked for：According to each sub-district of the screen The colour triangle in domain determines the first vertex set, the second vertex set and the 3rd vertex set, in first vertex set Element be summit for characterizing the red component of the common color gamut triangle to be selected, the unit in second vertex set Element is the summit for characterizing the green component of the common color gamut triangle to be selected, and the element in the 3rd vertex set is Summit for characterizing the blue component of the common color gamut triangle to be selected；First vertex set, described is determined respectively The quantity of the second vertex set and element in the 3rd vertex set；If first vertex set, second vertex set Close with the 3rd vertex set, the number of elements at least one set is zero, then confirm do not exist the common color gamut Triangle；If in first vertex set, second vertex set and the 3rd vertex set, the unit in each set Prime number amount is 1, then make the element in first vertex set, second vertex set and the 3rd vertex set It is three summits of the common color gamut triangle, so as to obtain the common color gamut triangle；If first vertex set, In second vertex set and the 3rd vertex set, the quantity of the element at least one set is more than 1, then according to institute The element in the first vertex set, second vertex set and the 3rd vertex set is stated, at least two public affairs to be selected are obtained Colour triangle, the common color gamut triangle is determined from described at least two common color gamut triangles to be selected altogether.
Specifically, firstly, for common color gamut vertex of a triangle, distributing position has two kinds of possibilities：A kind of situation is On intersection point in current gray series between certain two sub-regions colour triangle, another situation is to be located at current gray In series on the summit of certain sub-regions colour triangle.Accordingly, it would be desirable to all of above possible position of intersecting point is asked for, Subsequently screened again.For the first situation, choose successively under current gray series the colour triangle of all subregion with it is surplus The colour triangle that Yu Wei compares subregion carries out asking for for side position of intersecting point, obtains position of intersecting point collection A.Then, to each sub-district The vertex position in domain is asked for, and obtains position of intersecting point collection B, then C=A ∪ B are that common color gamut triangular apex may be distributed position The point set put.
(including it is located at positioned at the inside of all subregion colour triangles because common color gamut vertex of a triangle should meet Situation on three sides) condition, therefore, by the judgement of point and triangle position relation, screened for intersection point collection C, Deletion is unsatisfactory for being located at the point inside all subregion colour triangles, obtains new position of intersecting point collection D, then D is vertex position Set, the vertex position collection is combined into the union of the first vertex set, the second vertex set and the 3rd vertex set.
Under current gray series, if there is common color gamut triangle, summit one is positioned in position of intersecting point collection D, but The element that position of intersecting point is concentrated may belong to any one in three summits.Therefore, it is also desirable in opposite vertexes location sets Element carries out classification treatment, and classification treatment in position will determine that the element in vertex position set belongs to common color gamut triangle Which summit.The method of position classification is to be divided into three classes to the vertex position of the colour triangle of all subregions.Due to each son The colorimetric parameter of RGB test patterns when the summit difference of the colour triangle in region is corresponding, therefore, obtain corresponding CIE 1931Yxy parameters, in the middle of three parameters x, y and (z=1-x-y), the x parameter that R test patterns are obtained is generally maximum, and G is surveyed Attempt that the y parameters that card obtains are generally maximum, the z parameter that B test patterns are obtained is generally maximum, has differences each other.According to Information above, the summit to all subregions is divided into three classes according to the classification of R/G/B test patterns, comprehensive for every kind of classification The distribution of the vertex position of wherein each sub-regions colour triangle carries out comprehensively averagely, obtaining a position feature, then to RGB Three classes obtain respective feature locations, are expressed as TRI_R, TRI_G and TRI_B, and colour gamut three is represented with those feature locations The substantially distributing position on angular three summits.
For the element in set D, i.e. vertex position set, according between feature locations TRI_R, TRI_G and TRI_B Spacing, select a nearest summit to be classified, be divided into the first vertex set, the second vertex set and the 3rd vertex set Close, i.e. R vertex sets (being expressed as D_R), G vertex sets (being expressed as D_G) and B vertex sets (being expressed as D_B).By classification Afterwards, the number to the element in classification set D_R, D_G and D_B is counted.If there is element in three above classification set The situation that number is equal to 0, then prove that the common color gamut triangle under current gray series is non-existent, accordingly, it would be desirable to carry out Special treatment, is discussed in detail see following fourth aspects.If each element in gathering is individual in three above classification set Number is all 1, then the element in three above set is exactly three summits of common color gamut triangle.If three above classification set In, the number of the element in each classification set is both greater than 0, and wherein there is the situation more than 1, then from three classification set Distribution will form multiple common color gamut triangles to be selected when choosing RGB as component summit, at this time, it may be necessary to multiple public colors Domain triangle is estimated, and selects wherein optimal situation as final common color gamut triangle.
Determine from multiple common color gamut triangles to be selected during optimal common color gamut triangle, it is necessary to consider public affairs It is total to the factors such as area, the departure degree on summit and white high-high brightness that all subregion can be got off field of colour triangle.Tool Body, in determining described at least two common color gamut triangles to be selected, the area of each common color gamut triangle to be selected and top The departure degree of point, and determine the high-high brightness of all subregion of the screen under white field colourity；Treated for described at least two Each the common color gamut triangle to be selected in common color gamut triangle is selected, to area, the summit of the common color gamut triangle to be selected Departure degree and white field colourity under the high-high brightness of all subregion of the screen be weighted treatment, obtain weighting knot Really；Optimal weighted results are determined from all weighted results, by common color gamut to be selected corresponding with optimal weighted results Triangle is used as the common color gamut triangle.
During the optimal common color gamut triangle of above-mentioned determination, it is determined that all subregion of white field colourity sub-screen During high-high brightness, for each the common color gamut triangle to be selected in described at least two common color gamut triangles to be selected, it is determined that The high-high brightness on each summit of the common color gamut triangle to be selected；Determine whether the white field colourity of the screen falls within this and treat Select common color gamut triangle；When the white field colourity of the screen falls within the common color gamut triangle to be selected, from the public affairs to be selected Maximum is determined in the high-high brightness on each summit of colour triangle altogether, using the maximum as described under white field colourity The high-high brightness of all subregion of screen.
Specifically, when determining the high-high brightness of all subregion of white field colourity sub-screen, it is multiple to be selected public determining After colour triangle, for any one common color gamut triangle to be selected, three tops of the common color gamut triangle to be selected are determined Point (x, y) parameter after, by with current gray series under, the sub- monochrome information and sub- chrominance information of all subregion are counted Calculate, using the sub- monochrome information and sub- chrominance information of all subregion, it is determined that current common color gamut vertex of a triangle (x, y) to be selected Under colorimetric parameter, the brightness to be reached of each sub-regions.After the brightness of all subregions confirms, by the bright of wherein minimum Spend the high-high brightness that can be reached in three vertex positions as current common color gamut triangle to be selected.Next, to public affairs to be selected It is total to colour triangle to be determined whether, obtains target criteria chromatic value (x_std, the y_ of white field under current gray series Std), then, judge (x_std, y_std) whether in current common color gamut triangle to be selected.If (x_std, y_std) Not in common color gamut triangle to be selected, it was demonstrated that current common color gamut triangle to be selected is cannot normally under display target colourity White field, it is impossible to as optimal common color gamut triangle, it is necessary to reject.If (x_std, y_std) is located at public color to be selected In the triangle of domain, then the liaison parameter to the common color gamut Atria summit to be selected carries out the determination of ratio respectively, makes it When white field is shown, corresponding chromatic value is located exactly at (x_std, y_std).Then, according to preceding step determine it is to be selected The common color gamut Atria summit high-high brightness information to be reached, determines the white field of the common color gamut triangle to be selected Under colourity (x_std, y_std), the high-high brightness to be realized.
Multiple common color gamut triangles to be selected are estimated, when determining optimal common color gamut triangle, the mark of evaluation Standard is the area of colour triangle, three departure degrees between summit and TRI_R, TRI_G and TRI_B, and white field colourity (x_std, y_std) the lower high-high brightness to be realized, gamut area is bigger, three summits and TRI_R, TRI_G and TRI_B Between departure degree it is smaller, and the high-high brightness that can be realized under white field colourity (x_std, y_std) meets current gray The requirement of series target brightness adjustment value, then the colour triangle to be selected of evaluation be suitable as optimal common color gamut triangle Shape.In evaluation process, assessment is weighted to selection standard degree of conformity and is calculated, choose optimal colour triangle to be selected, as (the common color gamut triangle of current gray series contains light characteristic letter to the common color gamut triangle of current gray series simultaneously Breath).
Fourth aspect, comprehensive compensation coefficient and compensation process are determined according to common color gamut triangle.
For a specific GTG series, if by the analysis of the above-mentioned third aspect, it is found that the GTG series does not exist Common color gamut triangle, then according to existing brightness mura compensation ways, treat compensation pixel and compensate.
Specifically, during in the absence of common color gamut triangle, then the brightness mura mainly to the GTG series lacks It is trapped into going treatment.In processing procedure, the brightness to each sub-regions is extracted, according to Luminance Distribution feature, to each son Region compensates treatment, i.e., carry out brightness compacting to partially bright region, and luminance raising is carried out to partially dark region, so as to bright Degree mura is suppressed.The generating mode of luminance compensation coefficient can be found in formula (1), wherein, " Luminance_Dst " is represented and worked as Target adjustment brightness under preceding GTG, can lack according to the mura under the luma target comprehensive parameters current gray under each GTG series The situation of falling into determines；" Luminance_Current " represents the luminance parameter of current sub-region, after it can be by above piecemeal The extraction process of sub- monochrome information determine；" Func_Adj_Lumin " represents that luminance compensation coefficient calculates function, " Coeff_ Lumin_Mura_Current " represents luminance compensation coefficient；Shown in compensation process such as formula (2).By formula (2)：It is defeated Enter the pixel value [R, G, B] of pixel, compensated according to comprehensive compensation coefficient, finally give the new rgb pixel after compensation Value [R_NEW, G_NEW, B_NEW].
Coeff_Lumin_Mura_Current=Func_Adj_Lumin (Luminance_Dst, Luminance_ Current)
(1)
[R_New G_New B_New] '=Compensation_Lumin (Coeff_Lumin_Mura_Current, [R G B]’)
(2)
For a specific GTG series, if by the analysis of the above-mentioned third aspect, it is found that the GTG series is present public Common colour triangle, then the colour triangle according to the target subregion and the common color gamut triangle, determine the mesh Mark comprehensive compensation coefficient.For a specific GTG series, the comprehensive compensation system of all subregion under the GTG series is determined During number, the colour triangle of all subregion is changed to common color gamut triangle, while taking into account the treatment of brightness mura, completed After conversion, because each sub-regions brightness and colourity use unified parameter, therefore, during display, can be to being originally present Difference in colourity and brightness is effectively suppressed, that is, realize the treatment to colourity mura and brightness mura.
In processing procedure, the distribution characteristics of colour triangle and common color gamut triangle first according to current sub-region, Colour triangle to current sub-region is changed to common color gamut triangle, and the feature of liaison has been taken into account in transfer process, such as public Shown in formula (3).Wherein, " ColorGamut_Common " represents the comprehensive parameters of common color gamut combination light characteristic, " ColorGamut_Current " represents the comprehensive parameters of current sub-block colour gamut combination light characteristic, " Func_Adj_Chroma " Represent that comprehensive compensation coefficient calculates function, " Coeff_Color_Mura_Current " represents comprehensive compensation coefficient；Compensation process As shown in formula (4).By formula (4)：Comprehensive compensation coefficient Coeff_Color_Mura_ according to current sub-block Current, according to the rgb pixel value ([R G B] ') of input, by compensation process Compensation_Chroma, obtains new RGB pixel value ([R_New G_New B_New] '), the treatment of De Color Mura is completed, in brightness and colourity Mura defects are suppressed.
Coeff_Color_Mura_Current=Func_Adj_Chroma (ColorGamut_Common,
ColorGamut_Current) (3)
[R_New G_New B_New] '=Compensation_Chroma (Coeff_Color_Mura_Current, [R G B]’) (4)
In above-mentioned processing procedure, because test pattern is the test pattern of several specific grey-scale series, it is determined that synthesis Penalty coefficient can not cover all of GTG.Therefore, when treating compensation pixel and compensating, pixel to be compensated is designated as [R G B] numerical distribution characteristic of ', it is necessary to according to [R G B] ' determines the GTG series of pixel to be compensated, and pixel to be compensated Position determines target subregion.Because several specific grey-scale series can not cover all of GTG series, therefore, if some Individual GTG series including pixel to be compensated GTG series, and pixel to be compensated location of pixels also not No. seven fall at certain In sub-regions.Accordingly, it would be desirable to by the way of interpolation, row interpolation is entered between adjacent GTG, meanwhile, in adjacent sub-district Interpolation calculation is also carried out between domain, the target comprehensive compensation coefficient of pixel to be compensated is finally given.
5th aspect, it is considered to the situation of saturation degree.
Above-mentioned fourth aspect, calculate comprehensive compensation coefficient when, be to be processed by the way of common color gamut, by During the colour gamut of current sub-region is changed to common color gamut, it will usually so that the spatial dimension of colour gamut has been reduced. Under for a specific GTG series, if the image quality effect of certain sub-regions is poor, and (particularly its color gamut space scope is less In the case of), it will cause the space reduction of the common color gamut triangle finally determined, cause the saturation degree of color to decline, shadow The image quality effect of display is rung, when the saturation degree for being input into pixel RGB is higher, the situation is particularly evident.To prevent this kind of situation Send, need to consider saturation degree during compensation.Now, in the embodiment of the present application, when saturation degree is not less than predetermined threshold value, target is determined The luminance compensation coefficient of subregion, the first weight and the second weight, the first weight instruction brightness backoff weight, the second weight are indicated Colourity and luminance compensation weight, according to luminance compensation coefficient and the first weight, treating compensation pixel carries out luminance compensation, and according to Second weight and target comprehensive compensation coefficient, treating compensation pixel carries out colourity and brightness benefit.
Specifically, saturation degree is designated as into S, such as shown in formula (5), R, G, B are three input pixel values of component, can be adopted The mode for weighting treatment with brightness mura and colourity mura is improved image quality, i.e., in the case where saturation degree is higher, increase The treatment weight of brightness mura, mainly to brightness mura treatment, keeps original colorimetric parameter, makes the scope of color gamut space It is effectively controlled.
S=1-min (R, G, B) × 3.0/ (R+G+B) (5)
It is according to one maximum in R, G, B when the GTG series of (be expressed as [R G B] ') it is determined that pixel to be compensated What numerical value was determined, if the value of R, G, B is relatively, now, the common color gamut triangle chosen by the above method Shape is with actual color gamut characteristics than more consistent.And it is larger if there is one or two pixel in three pixels, but it is remaining The less situation of pixel value, then due to screen, under different GTG series there is certain skew in colorimetric parameter, it will make work as The accuracy of the colour triangle of preceding subregion declines, and when this occurs, the value of the S obtained according to formula (5) is larger, I.e. saturation degree is higher.In view of with the change of GTG series, light characteristic is more stable relative to the offset characteristic of colourity, because This, in the case where saturation degree is higher, increases the weight of brightness mura treatment, i.e. the value of the second weight is larger, the first weight Value is smaller.
Summary understands, using the saturation degree in formula (5), brightness mura and colourity mura is weighted, when full When larger with degree S, increase the treatment weight of brightness mura, that is, increase the second weight；When saturation degree S is smaller, increase colourity The treatment weight of mura, that is, increase the first weight.By above-mentioned processing procedure, it is capable of the space model of effective guarantee screen colour gamut Enclose, while realizing the correction process to colourity mura and brightness mura.
When the treatment weight of brightness mura and colourity mura is set according to saturation degree S, it is necessary to reference to current common color gamut It is grey relative to other relative to the distribution situation of the colour gamut of all subregions, and the common color gamut triangle of current gray series Factor of both the otherness of the common color gamut triangle of class number carries out synthesis, obtains final weighting parameters relation.
In compensation process, the parameter that the brightness mura and colourity mura of the position of pixel to be compensated treatment need by when it is adjacent The comprehensive compensation coefficient of nearly some sub-regions.Therefore, in processing procedure line by line pixel-by-pixel, from the comprehensive compensation system of storage Number, only obtain adjacent subarea domain comprehensive compensation coefficient, with the passage of location of pixels, then read other parts position it is comprehensive Penalty coefficient is closed, the comprehensive compensation coefficient that need not will be used is covered, so as to save determine target comprehensive compensation coefficient Space resources is consumed, the operational performance of boosting algorithm.
After compensating, can continue to be analyzed the mura of screen, so as to further generate new comprehensive compensation Coefficient, compensates processing procedure in the form of iteration.
Fig. 6 is the structural representation of the device embodiment one that the application eliminates screen inhomogeneities.What the present embodiment was provided Inhomogeneities cancellation element, its can realize the application any embodiment provide be applied to eliminate screen inhomogeneities method it is each Individual step.Specifically, the inhomogeneities cancellation element that the present embodiment is provided includes：
Acquisition module 11, for each test pattern at least one test pattern for different GTG series, obtains The monochromatic whole field information of the screen display test pattern, the monochromatic whole field information includes monochrome information and chrominance information, According to the monochromatic whole field information, the sub- chrominance information and sub- monochrome information of every sub-regions in the screen are obtained；
Processing module 12, for the every sub-regions in the screen, according to the sub- chrominance information of the subregion, it is determined that The colour triangle of the subregion；Judge that the colour triangle of every sub-regions of the screen whether there is common color gamut triangle Shape；
Generation module 13, for judging the screen when the processing module 12 in every sub-regions colour gamut triangle When shape has common color gamut triangle, for every sub-regions, according to the common color gamut triangle and the color of the subregion The sub- chrominance information and sub- monochrome information of domain triangle, the subregion, generate the comprehensive compensation coefficient of the subregion, according to each The comprehensive compensation coefficient of subregion obtains comprehensive compensation coefficient sets；
Compensating module 14, for the GTG series according to pixel to be compensated, target subregion and the comprehensive compensation system Manifold is closed, and determines target comprehensive compensation coefficient, and the target subregion is the son comprising the pixel to be compensated on the screen Region；According to the target comprehensive compensation coefficient, colourity and luminance compensation are carried out to the pixel to be compensated.
The device of the elimination screen inhomogeneities that the embodiment of the present application is provided, according to the test chart of several GTG series Card, generates the comprehensive compensation coefficient of every sub-regions under each GTG series, obtains comprehensive compensation coefficient sets.Then for one Individual specific pixel to be compensated, comprising the pixel to be compensated on the GTG series and screen for determine pixel to be compensated After subregion, i.e. target subregion, according to GTG number of stages mark subregion and the comprehensive compensation coefficient sets, target is determined Comprehensive compensation coefficient, then according to target comprehensive compensation compensating coefficient pixel to be compensated.During being somebody's turn to do, GTG series is different, screen The comprehensive compensation coefficient of the same subregion on curtain is different, and/or, the comprehensive compensation system of GTG series identical difference subregion Number is different, and in comprehensive compensation coefficient generating process, it is considered to monochrome information is considered while chrominance information, therefore, using comprehensive When closing penalty coefficient and treating compensation pixel and compensate, the compensation of brightness mura can be taken into account while compensation colourity mura, Colour gamut coverage can to the full extent be ensured, realized on the premise of colour gamut coverage is ensured, to colourity mura and brightness Mura is eliminated.
Optionally, in the embodiment of the application one, the compensating module 14, according to the target comprehensive compensation coefficient, When carrying out brightness and chromatic compensation to the pixel to be compensated, the saturation degree specifically for determining the pixel to be compensated；Work as institute When stating saturation degree not less than the predetermined threshold value, the luminance compensation coefficient of the target subregion is determined；Mended according to the brightness Coefficient is repaid, luminance compensation is carried out to the pixel to be compensated, and according to the target comprehensive compensation coefficient, to the picture to be compensated Element carries out colourity and luminance compensation.
Optionally, in the embodiment of the application one, the processing module 12 is judging every sub-regions of the screen When colour triangle whether there is common color gamut triangle, specifically for the colour triangle of all subregion according to the screen Determine the first vertex set, the second vertex set and the 3rd vertex set, the element in first vertex set is for table The summit of the red component of the common color gamut triangle to be selected is levied, the element in second vertex set is for characterizing The summit of the green component of common color gamut triangle to be selected is stated, the element in the 3rd vertex set is for characterizing described treating Select the summit of the blue component of common color gamut triangle；Determine respectively first vertex set, second vertex set with The quantity of element in 3rd vertex set；If the number of elements at least one set is zero, confirm in the absence of described Common color gamut triangle；If the number of elements in each set is 1, by first vertex set, second summit Gather three summits respectively as the common color gamut triangle with the element in the 3rd vertex set, so as to obtain State common color gamut triangle；If the quantity of the element at least one set is more than 1, according to first vertex set, institute The element in the second vertex set and the 3rd vertex set is stated, at least two common color gamut triangles to be selected is obtained, from institute State and determine the common color gamut triangle at least two common color gamut triangles to be selected.
Optionally, in the embodiment of the application one, the processing module 12, from described at least two common color gamuts to be selected When the common color gamut triangle is determined in triangle, specifically for determining at least two common color gamut triangle to be selected In, the area of each common color gamut triangle to be selected and the departure degree on summit, and determine each of the screen under white field colourity The high-high brightness of subregion；For each the common color gamut triangle to be selected in described at least two common color gamut triangles to be selected Shape, each sub-district of the screen under the area, the departure degree on summit and white field colourity to the function colour triangle to be selected The high-high brightness in domain is weighted treatment, obtains weighted results；Optimal weighted results are determined from all weighted results, will Common color gamut triangle to be selected corresponding with optimal weighted results is used as the common color gamut triangle.
Optionally, in the embodiment of the application one, the processing module 12, it is determined that under white field colourity the screen it is each During the high-high brightness of subregion, specifically for be selected public for each in described at least two common color gamut triangles to be selected Colour triangle, determines the high-high brightness on each summit of the common color gamut triangle to be selected；Determine the white field of the screen Whether colourity falls within the common color gamut triangle to be selected；When the white field colourity of the screen falls within the common color gamut triangle to be selected During shape, maximum is determined from the high-high brightness on each summit of the common color gamut triangle to be selected, by the maximum As the high-high brightness of all subregion of the screen under white field colourity.
Optionally, in the embodiment of the application one, the acquisition module 11, at least one test for different GTGs Each test pattern in graph card, before obtaining the monochromatic whole field information of the screen display test pattern, is additionally operable to from shooting Region where the screen is extracted in region.
Optionally, in the embodiment of the application one, the acquisition module 11 is additionally operable to enter the region where the screen Row geometric correction.
Optionally, in the embodiment of the application one, the compensating module 14, according to the GTG series, the target Subregion and the comprehensive compensation coefficient sets, when determining target comprehensive compensation coefficient, specifically for according to the different ashes The corresponding GTG series of at least one test pattern of class number, obtains GTG set；When the gray scale levels of the pixel to be compensated When number belongs to the GTG set, determine that GTG series is corresponding multiple comprehensive from the GTG comprehensive compensation coefficient sets Penalty coefficient, the target subregion according to where the pixel to be compensated, from the corresponding multiple comprehensive compensations of the GTG series The target comprehensive compensation coefficient is determined in coefficient.
Optionally, in the embodiment of the application one, the compensating module 14 is additionally operable to the GTG when the pixel to be compensated When series is not belonging to the GTG set, the first GTG series and the second GTG series are determined；Determine the first comprehensive compensation system Number with the second comprehensive compensation coefficient, the first comprehensive compensation coefficient be the first GTG series under, the target subregion Comprehensive compensation coefficient, the second comprehensive compensation coefficient be the second GTG series under, the synthesis of the target subregion Penalty coefficient, less than the GTG series of the target subregion, the second GTG series is more than institute for the first GTG series State the GTG series of target subregion；According to the first comprehensive compensation coefficient and the second comprehensive compensation coefficient, it is determined that described Target comprehensive compensation coefficient.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or Person's CD etc. is various can be with the medium of store program codes.

Claims (14)

1. it is a kind of eliminate screen inhomogeneities method, it is characterised in that including：
For each test pattern at least one test pattern of different GTG series, described screen display test chart is obtained The monochromatic whole field information of card, the monochromatic whole field information includes monochrome information and chrominance information；
Sub- chrominance information and sub- monochrome information in the screen according to the monochromatic whole field acquisition of information per sub-regions；
Every sub-regions in the screen, according to the sub- chrominance information of the subregion, determine the colour gamut triangle of the subregion Shape；
Judge that the colour triangle of every sub-regions of the screen whether there is common color gamut triangle；
When there is common color gamut triangle, for every sub-regions, according to the common color gamut triangle and the subregion Colour triangle, the sub- chrominance information of the subregion and sub- monochrome information, generate the comprehensive compensation coefficient of the subregion, according to The comprehensive compensation coefficient of each sub-regions obtains comprehensive compensation coefficient sets；
GTG series, target subregion and the comprehensive compensation coefficient sets according to the pixel to be compensated, determine target Comprehensive compensation coefficient, the target subregion is the subregion comprising the pixel to be compensated on the screen；
According to the target comprehensive compensation coefficient, colourity and luminance compensation are carried out to the pixel to be compensated.
2. method according to claim 1, it is characterised in that described according to the target comprehensive compensation coefficient, to described Pixel to be compensated carries out colourity and luminance compensation, including：
Determine the saturation degree of the pixel to be compensated；
When the saturation degree is not less than the predetermined threshold value, the luminance compensation coefficient of the target subregion is determined；
According to the luminance compensation coefficient and the target comprehensive compensation coefficient, colourity and brightness are carried out to the pixel to be compensated Compensation.
3. method according to claim 1 and 2, it is characterised in that the color of every sub-regions of the judgement screen Domain triangle whether there is common color gamut triangle, including：
The colour triangle of all subregion according to the screen determines the first vertex set, the second vertex set and the 3rd summit Set, the element in first vertex set is the top for characterizing the red component of the common color gamut triangle to be selected Point, the element in second vertex set is the summit for characterizing the green component of the common color gamut triangle to be selected, Element in 3rd vertex set is the summit for characterizing the blue component of the common color gamut triangle to be selected；
The quantity of first vertex set, second vertex set and element in the 3rd vertex set is determined respectively；
If the number of elements at least one set is zero, confirm do not exist the common color gamut triangle；
If the number of elements in each set is 1, by first vertex set, second vertex set and described the Element in three vertex sets respectively as the common color gamut triangle three summits, so as to obtain the common color gamut three It is angular；
If the quantity of the element at least one set is more than 1, according to first vertex set, second vertex set With the element in the 3rd vertex set, at least two common color gamut triangles to be selected are obtained, it is to be selected from described at least two The common color gamut triangle is determined in common color gamut triangle.
4. method according to claim 3, it is characterised in that described from described at least two common color gamut triangles to be selected In determine the common color gamut triangle, including：
In determining described at least two common color gamut triangles to be selected, the area of each common color gamut triangle to be selected and summit Departure degree, and determine the high-high brightness of all subregion of the screen under white field colourity；
For each the common color gamut triangle to be selected in described at least two common color gamut triangles to be selected, to the function to be selected The area of colour triangle, the departure degree on summit and the high-high brightness of all subregion of the screen is carried out under white field colourity Weighting is processed, and obtains weighted results；
Optimal weighted results are determined from all weighted results, by common color gamut to be selected corresponding with optimal weighted results Triangle is used as the common color gamut triangle.
5. method according to claim 4, it is characterised in that all subregion of the screen under the white field colourity of determination High-high brightness, including：
For each the common color gamut triangle to be selected in described at least two common color gamut triangles to be selected, determine described to be selected The high-high brightness on each summit of common color gamut triangle；
Judge whether the white field colourity of the screen falls within the common color gamut triangle to be selected；
When the white field colourity of the screen falls within the common color gamut triangle to be selected, from the common color gamut triangle to be selected Determine maximum in the high-high brightness on each summit, using the maximum as the screen under white field colourity all subregion High-high brightness.
6. method according to claim 1 and 2, it is characterised in that GTG series, the target according to pixel to be compensated Subregion and the comprehensive compensation coefficient sets, determine target comprehensive compensation coefficient, including：
The corresponding GTG series of at least one test pattern according to the different GTG series, obtains GTG set；
When the GTG series of the pixel to be compensated belongs to the GTG set, the target according to where the pixel to be compensated Subregion, the target comprehensive compensation coefficient is determined from the corresponding multiple comprehensive compensation coefficients of the GTG series.
7. method according to claim 6, it is characterised in that also include：
When the GTG series of the pixel to be compensated is not belonging to the GTG set, the first GTG series and the second ash are obtained Class number, less than the GTG series of the target subregion, the second GTG series is more than described for the first GTG series The GTG series of target subregion；
Determine the first comprehensive compensation coefficient and the second comprehensive compensation coefficient, the first comprehensive compensation coefficient is first GTG The comprehensive compensation coefficient of the target subregion under series, the second comprehensive compensation coefficient is institute under the second GTG series State the comprehensive compensation coefficient of target subregion；
According to the first comprehensive compensation coefficient and the second comprehensive compensation coefficient, the target comprehensive compensation coefficient is determined.
8. it is a kind of eliminate screen inhomogeneities device, it is characterised in that including：
Acquisition module, for each test pattern at least one test pattern for different GTG series, obtains the screen Curtain shows the monochromatic whole field information of the test pattern, and the monochromatic whole field information includes monochrome information and chrominance information, Yi Jigen According to sub- chrominance information and sub- monochrome information in screen described in the monochromatic whole field acquisition of information per sub-regions；
Processing module, for the every sub-regions in the screen, according to the sub- chrominance information of the subregion, determines the sub-district The colour triangle in domain, and judge that the colour triangle of every sub-regions of the screen whether there is common color gamut triangle Shape；
Generation module, for when the processing module judges to exist common color gamut triangle, for every sub-regions, according to The colour triangle of the common color gamut triangle and the subregion, the sub- chrominance information of the subregion and sub- monochrome information, The comprehensive compensation coefficient of the subregion is generated, the comprehensive compensation coefficient according to each sub-regions obtains comprehensive compensation coefficient sets；
Compensating module, for the GTG series according to pixel to be compensated, target subregion and the comprehensive compensation coefficient sets, Determine target comprehensive compensation coefficient, the target subregion is the subregion comprising the pixel to be compensated on the screen；With And according to the target comprehensive compensation coefficient, colourity and luminance compensation are carried out to the pixel to be compensated.
9. device according to claim 8, it is characterised in that
The compensating module, according to the target comprehensive compensation coefficient, is carrying out brightness and colourity benefit to the pixel to be compensated When repaying, the saturation degree specifically for determining the pixel to be compensated；When the saturation degree is not less than the predetermined threshold value, it is determined that The luminance compensation coefficient of the target subregion；According to the luminance compensation coefficient and the target comprehensive compensation coefficient, to institute Stating pixel to be compensated carries out colourity and luminance compensation.
10. device according to claim 8 or claim 9, it is characterised in that
The processing module, common color gamut triangle is whether there is in the colour triangle for judging every sub-regions of the screen When, specifically for all subregion according to the screen colour triangle determine the first vertex set, the second vertex set and 3rd vertex set, the element in first vertex set is for characterizing the red of the common color gamut triangle to be selected point The summit of amount, the element in second vertex set is the green component for characterizing the common color gamut triangle to be selected Summit, the element in the 3rd vertex set is the top for characterizing the blue component of the common color gamut triangle to be selected Point；The quantity of first vertex set, second vertex set and element in the 3rd vertex set is determined respectively；If Number of elements at least one set is zero, then confirm do not exist the common color gamut triangle；If the unit in each set Prime number amount is 1, then the element point in closing first vertex set, second vertex set and the 3rd collection summit Not as three summits of the common color gamut triangle, so as to obtain the common color gamut triangle；If at least one set In element quantity be more than 1, then according to first vertex set, second vertex set and the 3rd vertex set In element, obtain at least two common color gamut triangles to be selected, from described at least two common color gamut triangles to be selected really Make the common color gamut triangle.
11. devices according to claim 10, it is characterised in that
The processing module, the common color gamut triangle is being determined from described at least two common color gamut triangles to be selected When, specifically for determining at least two common color gamut triangle to be selected in, the area of each common color gamut triangle to be selected With the departure degree on summit, and the high-high brightness of all subregion of the screen under white field colourity is determined；For described at least two Each common color gamut triangle to be selected in individual common color gamut triangle to be selected, area to the function colour triangle to be selected, The high-high brightness of all subregion of the screen is weighted treatment under the departure degree on summit and white field colourity, is weighted As a result；Optimal weighted results are determined from all weighted results, by public color to be selected corresponding with optimal weighted results Domain triangle is used as the common color gamut triangle.
12. devices according to claim 11, it is characterised in that
The processing module, it is determined that during the high-high brightness of all subregion of the screen under white field colourity, specifically for for Each common color gamut triangle to be selected at least two common color gamut triangle to be selected, determines the common color gamut to be selected The high-high brightness on each summit of triangle；Judge whether the white field colourity of the screen falls within the common color gamut triangle to be selected Shape；When the white field colourity of the screen falls within the common color gamut triangle to be selected, from the common color gamut triangle to be selected Determine maximum in the high-high brightness on each summit, using the maximum as the screen under white field colourity all subregion High-high brightness.
13. device according to claim 8 or claim 9, it is characterised in that
The compensating module, in the GTG series according to pixel to be compensated, the target subregion and the comprehensive compensation system Manifold is closed, when determining target comprehensive compensation coefficient, specifically at least one test pattern according to the different GTG series Corresponding GTG series, obtains GTG set；When the GTG series of the pixel to be compensated belongs to the GTG set, from institute State and determine the corresponding multiple comprehensive compensation coefficients of GTG series in GTG comprehensive compensation coefficient sets, according to the picture to be compensated Target subregion where element, determines that the target is comprehensively mended from the corresponding multiple comprehensive compensation coefficients of the GTG series Repay coefficient.
14. devices according to claim 13, it is characterised in that
The compensating module, is additionally operable to when the GTG series of the pixel to be compensated is not belonging to the GTG set, obtains the One GTG series and the second GTG series, the first GTG series are less than the GTG series of the target subregion, described GTG series of the second GTG series more than the target subregion；And determine the first comprehensive compensation coefficient and the second comprehensive benefit Coefficient is repaid, the first comprehensive compensation coefficient is the comprehensive compensation coefficient of the target subregion under the first GTG series, The second comprehensive compensation coefficient is the comprehensive compensation coefficient of the target subregion under the second GTG series；According to described First comprehensive compensation coefficient and the second comprehensive compensation coefficient, determine the target comprehensive compensation coefficient.
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CN114299841B (en) * 2021-12-29 2023-11-24 合肥维信诺科技有限公司 Screen brightness compensation method
CN114582268A (en) * 2022-04-28 2022-06-03 武汉精立电子技术有限公司 Method, device and equipment for calculating Demura compensation parameters
CN114582268B (en) * 2022-04-28 2022-07-08 武汉精立电子技术有限公司 Method, device and equipment for calculating Demura compensation parameters

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