CN109036233A - The automatic gamma curve adjustment method of production line multiple spot and system - Google Patents

The automatic gamma curve adjustment method of production line multiple spot and system Download PDF

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Publication number
CN109036233A
CN109036233A CN201811044338.1A CN201811044338A CN109036233A CN 109036233 A CN109036233 A CN 109036233A CN 201811044338 A CN201811044338 A CN 201811044338A CN 109036233 A CN109036233 A CN 109036233A
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value
chromaticity coordinates
grayscale
mould group
gamma curve
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CN109036233B (en
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张承业
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Sichuan Changhong Electric Co Ltd
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Sichuan Changhong Electric Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Processing Of Color Television Signals (AREA)
  • Color Image Communication Systems (AREA)

Abstract

The present invention relates to field of liquid crystal display, the problem of can not carrying out the debugging of automatic gamma curve because of the limitation of each screen mould group characteristic, a kind of automatic gamma curve debugging system of production line multiple spot is proposed, including control chip, screen mould group, luminance detection device and the connection luminance detection device of connection control chip and the means for correcting for controlling chip；It controls chip and gives screen mould group for issuing test signal corresponding with rgb value；Shield mould group to be used for according to test signal display color；Luminance detection device is used for the chromaticity coordinates of test panel mould group；Means for correcting is used for when the difference of the chromaticity coordinates and target color coordinates that test out is greater than given threshold, the variable quantity and difference adjustment rgb value under grayscale are corresponded to when according to RGB one step, so that the chromaticity coordinates tested out is met the requirements, rgb value adjusted is smoothed the gamma curve after being corrected, the gamma curve correction of the practical liquid crystal TV set of the present invention.

Description

The automatic gamma curve adjustment method of production line multiple spot and system
Technical field
The present invention relates to field of liquid crystal display, in particular to the debugging of a kind of automatic gamma curve of production line.
Background technique
LCD screen will appear the color difference in different grayscale when showing different grayscale signals, in order to guarantee consistent ash Rank effect needs to compensate the rgb value in different grayscale accordingly, and forming new gamma curve, (including R-curve, G are bent Line and B curve), horizontal axis represents grayscale, and the longitudinal axis represents rgb value.It is able to satisfy the automatic Gamma of production line rhythm of production at this stage Adjustment, it is more demanding to screen mould group, it is necessary to for linear good RGB mould group, by RGB three primary colours brightness and equal with W brightness Principle come look into value debugging, although this method is substantially reduced in debug time, 8 debug times substantially 10S a left side The right side, if but shielding the linearly bad or screen mould group of shielding of mould group is the screen production that the automatic Gamma of multiple spot is temporarily not implemented in RGBW and RGBY etc. Line can not be then applicable in.
Summary of the invention
The technical problems to be solved by the present invention are: overcoming the limitation because of each screen mould group characteristic that can not carry out certainly in production line The problem of dynamic gamma curve debugging, proposes a kind of automatic gamma curve adjustment method of production line multiple spot and system.
The present invention solves above-mentioned technical problem, the technical solution adopted is that:
The automatic gamma curve adjustment method of production line multiple spot, includes the following steps:
A. choose initial gamma curve highest grayscale and at least one be less than the grayscale of highest grayscale as debug point, Determine the variable quantity of screen mould group corresponding chromaticity coordinates when RGB distinguishes one step variation under the corresponding grayscale of debug point；
B. it determines the corresponding rgb value of highest grayscale debug point of initial gamma curve, issues opposite with the rgb value The test signal answered gives screen mould group, and the chromaticity coordinates of test panel mould group judges the difference of the target color coordinates of the chromaticity coordinates and setting Whether given threshold is less than or equal to, if not, reducing highest grayscale in initial gamma curve according to the variable quantity and difference Corresponding rgb value issues test signal corresponding with the rgb value and gives screen mould group, the chromaticity coordinates of test panel mould group, until the color Coordinate is less than or equal to given threshold with the difference of the target color coordinates of the corresponding grayscale of setting, records highest grayscale pair adjusted The rgb value answered sends the debugging of highest grayscale and finishes signal；
C. using the corresponding rgb value of highest grayscale adjusted as vertex, using the line of the vertex and origin as linear Benchmark gamma curve；
D. the corresponding RGB of other grayscale debug points in addition to highest grayscale debug point is obtained according to benchmark gamma curve Value, issues corresponding with rgb value test signal to shielding mould group, the chromaticity coordinates of test panel mould group, judge the chromaticity coordinates and Whether the difference of the target color coordinates is less than or equal to given threshold, if not, being adjusted according to corresponding difference and variable quantity The corresponding rgb value of benchmark gamma curve issues signal of testing corresponding with the rgb value and gives screen mould group, and the color of test panel mould group is sat It is corresponding to record the grayscale adjusted until the difference of the chromaticity coordinates and target color coordinates is less than or equal to given threshold for mark Rgb value sends corresponding grayscale debugging and finishes signal；
E. R point, G point and B point are formed in reference axis according to the rgb value of record and corresponding grayscale, respectively to R point, G point With there is B point to be smoothed the gamma curve after being corrected.
Preferably, in the step a, enable initial testing go out chromaticity coordinates value be (Mx, My), target color coordinates value be (Tx, Ty), then the method for the corresponding rgb value of highest grayscale in initial gamma curve being reduced according to the variable quantity and difference are as follows:
Situation one: as Mx>=Tx and My<Ty, then B value and R value are reduced, G value remains unchanged；
Situation two: as Mx >=Tx and My > Ty, then G value and R value are reduced, B value remains unchanged；
Situation three: as Mx<Tx and My>=Ty, then B value and G value are reduced, R value remains unchanged；
Situation four: as Mx < Tx and My≤Ty, then reducing B value, and R value and G value remain unchanged, until testing out after adjustment Chromaticity coordinates x value it is equal with the x value of target color coordinates, enabling the chromaticity coordinates value that tests out at this time is (Mx1,My1), then there is Mx1= Tx；If My1> Ty and My1The value of-Ty is greater than given threshold, then according to My1The value of-Ty reduces G value accordingly, and R value and B value are kept It is constant, until the difference of the corresponding chromaticity coordinates tested out and purpose chromaticity coordinates is less than or equal to given threshold；Otherwise, if My1< Ty and Ty-My1Value be greater than given threshold, then according to Ty-My1Continue to reduce B value, until the y of the chromaticity coordinates tested out after adjusting again Value is equal with the y value of target color coordinates, and enabling the chromaticity coordinates value tested out at this time is (Mx2,My2), then there is My2=Ty, Mx2> Tx, If Mx2The value of-Tx is greater than given threshold, then according to Mx2Low r-value drops in the value of-Tx accordingly, until the corresponding chromaticity coordinates tested out It is less than or equal to given threshold with the difference of purpose chromaticity coordinates.
Preferably, the variable quantity difference of screen mould group corresponding chromaticity coordinates xy when R value one step changes under highest grayscale is enabled For Rx and Ry, enable screen mould group corresponding chromaticity coordinates xy when G value one step changes under highest grayscale variable quantity be respectively Gx and Gy, the variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Bx and By when B value one step under highest grayscale being enabled to change, then:
In the situation one, B value is reducedR value reduces
In the situation two, G value is reducedR value reduces
In the situation three, B value is reducedG value reduces
In the situation four, as Mx < Tx and My≤Ty, then B value is reduced, B value reduces at this timeWork as basis My1When the value of-Ty reduces G value accordingly, G value is reducedWhen according to Ty-My1When continuing to reduce B value, B value is reduced ?When according to Mx2When low r-value drops in the value of-Tx accordingly, R value is reduced
Preferably, corresponding according to the corresponding difference of grayscale and variable quantity adjustment benchmark gamma curve in the step d The method of rgb value are as follows: the grayscale number lower than highest grayscale for enabling selection is n, obtains corresponding grayscale according to benchmark gamma curve Rgb value, be denoted as (Rn,Gn,Bn), enable the color tested out when issuing test signal corresponding with the rgb value to screen mould group sit Scale value is (Mxn,Myn), target color coordinates value is (Tx, Ty), enables screen mould group when R value one step changes under corresponding grayscale corresponding Chromaticity coordinates xy variable quantity be RxnAnd Ryn, enable screen mould group corresponding chromaticity coordinates xy when G value one step changes under corresponding grayscale Variable quantity be GxnAnd Gyn, the variable quantity of the corresponding chromaticity coordinates xy of screen mould group is when enabling B value one step variation under corresponding grayscale BxnAnd Byn, the variable quantity for enabling the needs of R value, G value and B value adjust is respectively Δ R, Δ G and Δ B, given threshold d, then:
It solves above-mentioned equation and obtains qualified Δ R, Δ G and Δ B, then the corresponding rgb value of the grayscale adjusted Respectively Rn+ Δ R, Gn+ Δ G and Bn+ΔB。
Further, in the step d, if being issued after the corresponding rgb value of grayscale described in adjustment benchmark gamma curve Signal of testing corresponding with the rgb value gives screen mould group, tests out chromaticity coordinates and the aim colour of the corresponding grayscale of setting of screen mould group Given threshold is still greater than in the minimum value of the difference of coordinate, then the chromaticity coordinates of the screen mould group is subtracted given threshold as setting Deviation, records the corresponding rgb value of the minimum value, and the debugging of corresponding grayscale terminates.
The automatic gamma curve debugging system of production line multiple spot, including means for correcting, television set to be corrected and brightness detection dress It sets, control chip and screen mould group, the means for correcting connection control chip and brightness detection dress is provided in television set to be corrected It sets, control chip connection screen mould group, screen mould group is corresponding with luminance detection device；
It controls chip and gives screen mould group for issuing test signal corresponding with rgb value；
The screen mould group is used for according to the test signal display color；
The luminance detection device is used for the chromaticity coordinates of test panel module displays color；
The highest grayscale that the means for correcting is used to choose initial gamma curve is less than the ash of highest grayscale at least one Rank determines screen mould group corresponding chromaticity coordinates when RGB distinguishes one step variation under the corresponding grayscale of debug point as debug point Variable quantity；Determine that the corresponding rgb value of highest grayscale debug point, notice control chip issue survey corresponding with the rgb value Trial signal gives screen mould group, obtains the chromaticity coordinates for the screen mould group that luminance detection device tests out, then judges the chromaticity coordinates and setting The differences of target color coordinates whether be less than or equal to given threshold, if not, being reduced according to the variable quantity and difference initial The corresponding rgb value of highest grayscale in gamma curve, notice control chip issue test signal corresponding with the rgb value to screen Mould group obtains the chromaticity coordinates for the screen mould group that luminance detection device tests out, until the mesh of the chromaticity coordinates and the corresponding grayscale of setting The difference for marking chromaticity coordinates is less than or equal to given threshold, records the corresponding rgb value of highest grayscale adjusted；
The means for correcting is also used to using the corresponding rgb value of highest grayscale adjusted as vertex, with the vertex and origin Line as linear benchmark gamma curve, other ashes in addition to highest grayscale debug point are obtained according to benchmark gamma curve The corresponding rgb value of contrast pilot, notice control chip issue test signal corresponding with the rgb value and give screen mould group, obtain The chromaticity coordinates for the screen mould group for taking luminance detection device to test out, judges whether the chromaticity coordinates and the difference of the target color coordinates are small In being equal to given threshold, if not, being led to according to corresponding difference and the corresponding rgb value of variable quantity adjustment benchmark gamma curve Know that control chip issues signal of testing corresponding with the rgb value and gives screen mould group, obtains the screen mould group that luminance detection device tests out Chromaticity coordinates record the grayscale adjusted until the difference of the chromaticity coordinates and target color coordinates is less than or equal to given threshold Corresponding rgb value；R point, G point and B point are formed in reference axis according to the rgb value of record and corresponding grayscale, respectively to R point, G It puts and there is B point to be smoothed the gamma curve after being corrected, by the gamma curve write-in control chip after correction.
Preferably, the means for correcting includes correction module one, and correction module one is for then corresponding according to highest grayscale Variable quantity and difference reduce corresponding rgb value in initial gamma curve, even the chromaticity coordinates value that initial testing goes out when highest grayscale For (Mx, My), target color coordinates value is (Tx, Ty), then judges:
Situation one: as Mx>=Tx and My<Ty, then B value and R value are reduced, G value remains unchanged；
Situation two: as Mx >=Tx and My > Ty, then G value and R value are reduced, B value remains unchanged；
Situation three: as Mx<Tx and My>=Ty, then B value and G value are reduced, R value remains unchanged；
Situation four: as Mx < Tx and My≤Ty, then reducing B value, and R value and G value remain unchanged, until testing out after adjustment Chromaticity coordinates x value it is equal with the x value of target color coordinates, enabling the chromaticity coordinates value that tests out at this time is (Mx1,My1), then there is Mx1= Tx；If My1> Ty and My1The value of-Ty is greater than given threshold, then according to My1The value of-Ty reduces G value accordingly, and R value and B value are kept It is constant, until the difference of the corresponding chromaticity coordinates tested out and purpose chromaticity coordinates is less than or equal to given threshold；Otherwise, if My1< Ty and Ty-My1Value be greater than given threshold, then according to Ty-My1Continue to reduce B value, until the y of the chromaticity coordinates tested out after adjusting again Value is equal with the y value of target color coordinates, and enabling the chromaticity coordinates value tested out at this time is (Mx2,My2), then there is My2=Ty, Mx2> Tx, If Mx2The value of-Tx is greater than given threshold, then according to Mx2Low r-value drops in the value of-Tx accordingly, until the corresponding chromaticity coordinates tested out It is less than or equal to given threshold with the difference of purpose chromaticity coordinates.
Preferably, the correction module one further includes decreasing value computing module, and the decreasing value computing module is used for: being enabled most The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Rx and Ry when R value one step changes under high gray, enables highest grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Gx and Gy when lower G value one step changes, and enables B value list under highest grayscale The variable quantity of screen mould group corresponding chromaticity coordinates xy is respectively Bx and By when the step change of position, then:
In the situation one, B value is reducedR value reduces
In the situation two, G value is reducedR value reduces
In the situation three, B value is reducedG value reduces
In the situation four, as Mx < Tx and My≤Ty, then B value is reduced, B value reduces at this timeWork as basis My1When the value of-Ty reduces G value accordingly, G value is reducedWhen according to Ty-My1When continuing to reduce B value, B value is reduced ?When according to Mx2When low r-value drops in the value of-Tx accordingly, R value is reduced
Preferably, the means for correcting further includes correction module two, and the correction module two is used for according to selection except most The corresponding difference of grayscale and the corresponding rgb value of variable quantity adjustment benchmark gamma curve outside high gray, it may be assumed that enable being lower than for selection The grayscale number of highest grayscale is n, and the rgb value of corresponding grayscale is obtained according to benchmark gamma curve, is denoted as (Rn,Gn,Bn), enable hair Test signal corresponding with the rgb value is (Mx to the chromaticity coordinates value tested out when shielding mould group outn,Myn), target color coordinates Value is (Tx, Ty), and enabling the variable quantity of screen mould group corresponding chromaticity coordinates xy when R value one step changes under corresponding grayscale is RxnWith Ryn, enabling the variable quantity of screen mould group corresponding chromaticity coordinates xy when G value one step changes under corresponding grayscale is GxnAnd Gyn, enable corresponding The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is Bx when B value one step changes under grayscalenAnd Byn, enable R value, G value and B value The variable quantity for needing to adjust is respectively Δ R, Δ G and Δ B, given threshold d, then:
It solves above-mentioned equation and obtains qualified Δ R, Δ G and Δ B, then the corresponding rgb value of the grayscale adjusted Respectively Rn+ Δ R, Gn+ Δ G and Bn+ΔB。
Further, the correction module two further includes deviation compensation module, and the deviation compensation module is used for when adjustment The corresponding rgb value of grayscale described in benchmark gamma curve, control chip issue signal of testing corresponding with the rgb value and give screen mould Group, chromaticity coordinates and the minimum of the difference of the target color coordinates of the corresponding grayscale of setting of the screen mould group that luminance detection device tests out When given threshold is still greater than in value, the chromaticity coordinates of the screen mould group is subtracted into given threshold as setting deviation, described in record The debugging of the corresponding rgb value of minimum value, corresponding grayscale terminates.
The beneficial effects of the present invention are:
1) before the debugging of automatic gamma curve, R value under each grayscale, G value and B value difference one step can be determined in advance and become The variable quantity of the corresponding chromaticity coordinates of screen mould group when change；When debugging, according to the corresponding chromaticity coordinates value tested out of highest grayscale debug point Rgb value corresponding with the adjustment of the variable quantity of the difference of target color coordinates and one step chromaticity coordinates, so that the chromaticity coordinates tested out The difference of value and target color coordinates is less than or equal to given threshold, records the corresponding rgb value of highest grayscale adjusted, successively RGB Value draw benchmark gamma curve, chosen in benchmark gamma curve at least one lower than highest grayscale grayscale as debug point Then it is debugged, because the mode of RGB debugging is adjusted using according to the variable quantity of difference and one step chromaticity coordinates, The constraint of screen mould group form can be got rid of；
2) it can be debugged using multiple spot, improve the accuracy of gamma curve；
3) test signal is directly issued by controlling chip, time-consuming very short, means for correcting is calculated, and TV is reduced The processing load of machine, time-consuming is written the time of control chip in rgb value in whole process, and the RGB under each grayscale after correcting It is worth last time write-in control chip, in the case where such 8 debug points, the when a length of 8s of automatic gamma curve debugging is whole The debug time of body complies fully with production line working time pipe nipple and plays fast requirement.
Detailed description of the invention
Fig. 1 is the system flow chart of the embodiment of the present invention；
Fig. 2 is the gamma curve after the correction of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, right with reference to the accompanying drawings and embodiments The present invention is further elaborated.
The automatic gamma curve adjustment method of production line multiple spot, includes the following steps:
A. choose initial gamma curve highest grayscale and at least one be less than the grayscale of highest grayscale as debug point, Determine the variable quantity of screen mould group corresponding chromaticity coordinates when RGB distinguishes one step variation under the corresponding grayscale of debug point.
Wherein, the variable quantity of the corresponding chromaticity coordinates of screen mould group, can be used logical when RGB distinguishes one step variation under each grayscale The rgb value changed under each grayscale is crossed, corresponding test signal is issued, obtains the variable quantity of chromaticity coordinates, and then it is single respectively to obtain RGB The variable quantity of the corresponding chromaticity coordinates of screen mould group when the step change of position.
B. it determines the corresponding rgb value of highest grayscale debug point of initial gamma curve, issues opposite with the rgb value The test signal answered gives screen mould group, and the chromaticity coordinates of test panel mould group judges the difference of the target color coordinates of the chromaticity coordinates and setting Whether given threshold is less than or equal to, if not, reducing highest grayscale in initial gamma curve according to the variable quantity and difference Corresponding rgb value issues test signal corresponding with the rgb value and gives screen mould group, the chromaticity coordinates of test panel mould group, until the color Coordinate is less than or equal to given threshold with the difference of the target color coordinates of the corresponding grayscale of setting, records highest grayscale pair adjusted The rgb value answered sends the debugging of highest grayscale and finishes signal；
The corresponding rgb value of highest grayscale in view of initial gamma curve has been maximum value, and the value of RGB can only drop when adjusting It is low, and the be affected Y value of opponent-color coordinates of directly proportional and opponent-color coordinates X values that is changing into of the variation of R value and chromaticity coordinates influences It is smaller, the variation of G value and directly proportional and opponent-color coordinates the Y value of variation of chromaticity coordinates be affected opponent-color coordinates X value influence compared with It is small, and the variation of B value and the variation of chromaticity coordinates are inversely proportional and the influence of the X value and Y value of opponent-color coordinates is larger, it is then, described In step a, the chromaticity coordinates value for enabling initial testing go out is (Mx, My), and target color coordinates value is (Tx, Ty), then according to the variation The method that amount and difference reduce the corresponding rgb value of highest grayscale in initial gamma curve can be used such as under type are as follows:
Situation one: as Mx>=Tx and My<Ty, then B value and R value are reduced, G value remains unchanged；
Situation two: as Mx >=Tx and My > Ty, then G value and R value are reduced, B value remains unchanged；
Situation three: as Mx<Tx and My>=Ty, then B value and G value are reduced, R value remains unchanged；
Situation four: as Mx < Tx and My≤Ty, then reducing B value, and R value and G value remain unchanged, until testing out after adjustment Chromaticity coordinates x value it is equal with the x value of target color coordinates, enabling the chromaticity coordinates value that tests out at this time is (Mx1,My1), then there is Mx1= Tx；If My1> Ty and My1The value of-Ty is greater than given threshold, then according to My1The value of-Ty reduces G value accordingly, and R value and B value are kept It is constant, until the difference of the corresponding chromaticity coordinates tested out and purpose chromaticity coordinates is less than or equal to given threshold；Otherwise, if My1< Ty and Ty-My1Value be greater than given threshold, then according to Ty-My1Continue to reduce B value, until the y of the chromaticity coordinates tested out after adjusting again Value is equal with the y value of target color coordinates, and enabling the chromaticity coordinates value tested out at this time is (Mx2,My2), then there is My2=Ty, Mx2> Tx, If Mx2The value of-Tx is greater than given threshold, then according to Mx2Low r-value drops in the value of-Tx accordingly, until the corresponding chromaticity coordinates tested out It is less than or equal to given threshold with the difference of purpose chromaticity coordinates.The step-length of the reduction is that unit step-length is reduced.
To improve the efficiency that rgb value reduces, it can disposably be adjusted in place as far as possible, corresponding decreasing value can be calculated, enable The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Rx and Ry when R value one step changes under highest grayscale, enables most high ash The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Gx and Gy when G value one step changes under rank, enables B value under highest grayscale The variable quantity of screen mould group corresponding chromaticity coordinates xy is respectively Bx and By when one step changes, then:
In the situation one, B value is reducedR value reduces
In the situation two, G value is reducedR value reduces
In the situation three, B value is reducedG value reduces
In the situation four, as Mx < Tx and My≤Ty, then B value is reduced, B value reduces at this timeWork as basis My1When the value of-Ty reduces G value accordingly, G value is reducedWhen according to Ty-My1When continuing to reduce B value, B value is reduced ?When according to Mx2When low r-value drops in the value of-Tx accordingly, R value is reduced
C. using the corresponding rgb value of highest grayscale adjusted as vertex, using the line of the vertex and origin as linear Benchmark gamma curve；
D. the corresponding RGB of other grayscale debug points in addition to highest grayscale debug point is obtained according to benchmark gamma curve Value, issues corresponding with rgb value test signal to shielding mould group, the chromaticity coordinates of test panel mould group, judge the chromaticity coordinates and Whether the difference of the target color coordinates is less than or equal to given threshold, if not, being adjusted according to corresponding difference and variable quantity The corresponding rgb value of benchmark gamma curve issues signal of testing corresponding with the rgb value and gives screen mould group, and the color of test panel mould group is sat It is corresponding to record the grayscale adjusted until the difference of the chromaticity coordinates and target color coordinates is less than or equal to given threshold for mark Rgb value sends corresponding grayscale debugging and finishes signal.
For the efficiency for improving rgb value adjustment, it can disposably be adjusted in place as far as possible, RGB phase can be calculated in requisition for adjustment Changing value, according to the corresponding difference of grayscale and the corresponding rgb value of variable quantity adjustment benchmark gamma curve in the step d Method are as follows: the grayscale number lower than highest grayscale for enabling selection is n, and the RGB of corresponding grayscale is obtained according to benchmark gamma curve Value, is denoted as (Rn,Gn,Bn), enable the chromaticity coordinates value tested out when issuing test signal corresponding with the rgb value to screen mould group For (Mxn,Myn), target color coordinates value is (Tx, Ty), enables screen mould group corresponding color when R value one step changes under corresponding grayscale The variable quantity of coordinate xy is RxnAnd Ryn, enable the change of screen mould group corresponding chromaticity coordinates xy when G value one step changes under corresponding grayscale Change amount is GxnAnd Gyn, enabling the variable quantity of screen mould group corresponding chromaticity coordinates xy when B value one step changes under corresponding grayscale is Bxn And Byn, the variable quantity for enabling the needs of R value, G value and B value adjust is respectively Δ R, Δ G and Δ B, given threshold d, then:
It solves above-mentioned equation and obtains qualified Δ R, Δ G and Δ B, then the corresponding rgb value of the grayscale adjusted Respectively Rn+ Δ R, Gn+ Δ G and Bn+ΔB.Method when can be according to adjustment highest grayscale in solving above-mentioned equation, according to test The situation of the comparison of the value and target color coordinates of chromaticity coordinates out, by the knots modification zero setting of some R value or G value or B value.
In view of the chromaticity coordinates tested out after the debugging of RGB under abnormal conditions is still unable to satisfy requirement, avoid debugging into Row endless loop, in the step d, if being issued and the rgb value after the corresponding rgb value of grayscale described in adjustment benchmark gamma curve Corresponding test signal gives screen mould group, tests out the chromaticity coordinates of screen mould group and the difference of the target color coordinates of the corresponding grayscale of setting Minimum value given threshold is still greater than, then using the chromaticity coordinates of the screen mould group subtract given threshold as setting deviation, note The corresponding rgb value of the minimum value is recorded, the debugging of corresponding grayscale terminates.
E. R point, G point and B point are formed in reference axis according to the rgb value of record and corresponding grayscale, respectively to R point, G point With there is B point to be smoothed the gamma curve after being corrected.
Above-mentioned smoothing processing is existing algorithm, and details are not described herein again.
As shown in Figure 1, the automatic gamma curve debugging system of production line multiple spot, including means for correcting, television set to be corrected and Luminance detection device, is provided with control chip and screen mould group in television set to be corrected, the means for correcting connection control chip and Luminance detection device, control chip connection screen mould group, screen mould group are corresponding with luminance detection device；
It controls chip and gives screen mould group for issuing test signal corresponding with rgb value；
The screen mould group is used for according to the test signal display color；
The luminance detection device is used for the chromaticity coordinates of test panel module displays color；
The highest grayscale that the means for correcting is used to choose initial gamma curve is less than the ash of highest grayscale at least one Rank determines screen mould group corresponding chromaticity coordinates when RGB distinguishes one step variation under the corresponding grayscale of debug point as debug point Variable quantity；Determine that the corresponding rgb value of highest grayscale debug point, notice control chip issue survey corresponding with the rgb value Trial signal gives screen mould group, obtains the chromaticity coordinates for the screen mould group that luminance detection device tests out, then judges the chromaticity coordinates and setting The differences of target color coordinates whether be less than or equal to given threshold, if not, being reduced according to the variable quantity and difference initial The corresponding rgb value of highest grayscale in gamma curve, notice control chip issue test signal corresponding with the rgb value to screen Mould group obtains the chromaticity coordinates for the screen mould group that luminance detection device tests out, until the mesh of the chromaticity coordinates and the corresponding grayscale of setting The difference for marking chromaticity coordinates is less than or equal to given threshold, records the corresponding rgb value of highest grayscale adjusted；Means for correcting can be used PC machine.
The corresponding rgb value of highest grayscale in view of initial gamma curve has been maximum value, and the value of RGB can only drop when adjusting It is low, and the be affected Y value of opponent-color coordinates of directly proportional and opponent-color coordinates X values that is changing into of the variation of R value and chromaticity coordinates influences It is smaller, the variation of G value and directly proportional and opponent-color coordinates the Y value of variation of chromaticity coordinates be affected opponent-color coordinates X value influence compared with It is small, and the variation of B value and the variation of chromaticity coordinates are inversely proportional and the influence of the X value and Y value of opponent-color coordinates is larger, the correction dress Setting further includes correction module one, and correction module one reduces for then according to the corresponding variable quantity of highest grayscale and difference initial Corresponding rgb value in gamma curve, even the chromaticity coordinates value that initial testing goes out when highest grayscale is (Mx, My), target color coordinates Value is (Tx, Ty), then judges:
Situation one: as Mx>=Tx and My<Ty, then B value and R value are reduced, G value remains unchanged；
Situation two: as Mx >=Tx and My > Ty, then G value and R value are reduced, B value remains unchanged；
Situation three: as Mx<Tx and My>=Ty, then B value and G value are reduced, R value remains unchanged；
Situation four: as Mx < Tx and My≤Ty, then reducing B value, and R value and G value remain unchanged, until testing out after adjustment Chromaticity coordinates x value it is equal with the x value of target color coordinates, enabling the chromaticity coordinates value that tests out at this time is (Mx1,My1), then there is Mx1= Tx；If My1> Ty and My1The value of-Ty is greater than given threshold, then according to My1The value of-Ty reduces G value accordingly, and R value and B value are kept It is constant, until the difference of the corresponding chromaticity coordinates tested out and purpose chromaticity coordinates is less than or equal to given threshold；Otherwise, if My1< Ty and Ty-My1Value be greater than given threshold, then according to Ty-My1Continue to reduce B value, until the y of the chromaticity coordinates tested out after adjusting again Value is equal with the y value of target color coordinates, and enabling the chromaticity coordinates value tested out at this time is (Mx2,My2), then there is My2=Ty, Mx2> Tx, If Mx2The value of-Tx is greater than given threshold, then according to Mx2Low r-value drops in the value of-Tx accordingly, until the corresponding chromaticity coordinates tested out It is less than or equal to given threshold with the difference of purpose chromaticity coordinates.
To improve the efficiency that rgb value reduces, it can disposably be adjusted in place as far as possible, corresponding decreasing value, institute can be calculated Stating correction module one further includes decreasing value computing module, and the decreasing value computing module is used for: R value unit under highest grayscale being enabled to walk The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Rx and Ry when long variation, and G value one step under highest grayscale is enabled to change When screen mould group corresponding chromaticity coordinates xy variable quantity be respectively Gx and Gy, enable screen mould when B value one step changes under highest grayscale The variable quantity of the corresponding chromaticity coordinates xy of group is respectively Bx and By, then:
In the situation one, B value is reducedR value reduces
In the situation two, G value is reducedR value reduces
In the situation three, B value is reducedG value reduces
In the situation four, as Mx < Tx and My≤Ty, then B value is reduced, B value reduces at this timeWork as basis My1When the value of-Ty reduces G value accordingly, G value is reducedWhen according to Ty-My1When continuing to reduce B value, B value is reduced ?When according to Mx2When low r-value drops in the value of-Tx accordingly, R value is reduced
The means for correcting is also used to using the corresponding rgb value of highest grayscale adjusted as vertex, with the vertex and origin Line as linear benchmark gamma curve, other ashes in addition to highest grayscale debug point are obtained according to benchmark gamma curve The corresponding rgb value of contrast pilot, notice control chip issue test signal corresponding with the rgb value and give screen mould group, obtain The chromaticity coordinates for the screen mould group for taking luminance detection device to test out, judges whether the chromaticity coordinates and the difference of the target color coordinates are small In being equal to given threshold, if not, being led to according to corresponding difference and the corresponding rgb value of variable quantity adjustment benchmark gamma curve Know that control chip issues signal of testing corresponding with the rgb value and gives screen mould group, obtains the screen mould group that luminance detection device tests out Chromaticity coordinates record the grayscale adjusted until the difference of the chromaticity coordinates and target color coordinates is less than or equal to given threshold Corresponding rgb value；R point, G point and B point are formed in reference axis according to the rgb value of record and corresponding grayscale, respectively to R point, G It puts and there is B point to be smoothed the gamma curve after being corrected, by the gamma curve write-in control chip after correction.
For the efficiency for improving rgb value adjustment, it can disposably be adjusted in place as far as possible, RGB phase can be calculated in requisition for adjustment Changing value, the means for correcting further includes correction module two, the correction module two be used for according to selection remove highest grayscale The corresponding difference of outer grayscale and the corresponding rgb value of variable quantity adjustment benchmark gamma curve, it may be assumed that enable selection is lower than most high ash The grayscale number of rank is n, and the rgb value of corresponding grayscale is obtained according to benchmark gamma curve, is denoted as (Rn,Gn,Bn), enable sending and institute The chromaticity coordinates value tested out when stating the corresponding test signal of rgb value to screen mould group is (Mxn,Myn), target color coordinates value is (Tx, Ty), enabling the variable quantity of screen mould group corresponding chromaticity coordinates xy when R value one step changes under corresponding grayscale is RxnAnd Ryn, enable The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is Gx when G value one step changes under corresponding grayscalenAnd Gyn, enable under corresponding grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is Bx when B value one step changesnAnd Byn, R value, G value and B value is enabled to need to adjust Whole variable quantity is respectively Δ R, Δ G and Δ B, given threshold d, then:
It solves above-mentioned equation and obtains qualified Δ R, Δ G and Δ B, then the corresponding rgb value of the grayscale adjusted Respectively Rn+ Δ R, Gn+ Δ G and Bn+ΔB。
In view of the chromaticity coordinates tested out after the debugging of RGB under abnormal conditions is still unable to satisfy requirement, avoid debugging into Row endless loop, the correction module two further include deviation compensation module, and the deviation compensation module is used for as adjustment benchmark Gamma The corresponding rgb value of grayscale described in curve, control chip issue signal of testing corresponding with the rgb value and give screen mould group, brightness inspection Chromaticity coordinates and the minimum value of the difference of the target color coordinates of the corresponding grayscale of setting for surveying the screen mould group that device to test goes out are still big When given threshold, the chromaticity coordinates of the screen mould group is subtracted into given threshold as setting deviation, records the minimum value pair The debugging of the rgb value answered, corresponding grayscale terminates.
Embodiment
In the present embodiment, it be the corresponding highest grayscale of maximum value 255 is the linear of 255 ranks that initial gamma curve, which is RGB, Gamma curve, the target color coordinates set is Tx=0.284, Ty=0.296；Given threshold is 0.003, that is, after correction Chromaticity coordinates belong to (0.284 ± 0.003,0.296 ± 0.003) this range.
The screen mould group of liquid crystal display is corresponding when determining R value under highest grayscale i.e. 255 ranks, G value and the difference one step variation of B value Chromaticity coordinates variable quantity be (Rx, Ry), (Gx, Gy) and (Bx, By), test R value change after chromaticity coordinates variable quantity, will change Corresponding (Rx, Ry) can be obtained divided by the change value of R in amount, can similarly test to obtain (Gx, Gy) and (Bx, By), different screens These values of mould group are inconsistent, the Rx=0.003 tested in the present embodiment, Ry=0.0001, Gx=0.001, Gy= 0.003, Bx=0.001, By=0.002.
The corresponding chromaticity coordinates of debugging highest grayscale, control chip issue corresponding with rgb value (255,255,255) first Test signal to screen mould group, screen mould group according to test signal display color, luminance detection device test panel module displays color Chromaticity coordinates (Mx, My), wherein Mx=0.289, My=0.276, Mx-Tx=0.005 > 0.003 at this time, Ty-My=0.02 > 0.003, the difference of chromaticity coordinates and the target color coordinates of setting is greater than given threshold 0.003 at this time, not in claimed range, just needs The corresponding rgb value of initial gamma curve highest grayscale is adjusted, and Mx>Tx, My<Ty, belong to situation one, needs to drop Low B value and R value, G value remain unchanged, and B value needs to reduceR value needs to reduceI.e. correct after rgb value be (250,255, 245), issue correction after the corresponding test signal of rgb value to screen mould group, test obtain screen mould group chromaticity coordinates for (0.286, 0.294), the difference of this chromaticity coordinates and target color coordinates is (0.002,0.002), meet (0.284 ± 0.003,0.296 ± 0.003) the corresponding Gamma point correction of this range, so most high-order finishes.
It is that vertex and origin make a linear benchmark gamma curve with (250,255,245), takes remaining 7 average ashes The corresponding debug point of rank corrects gamma curve, respectively 32 ranks, 64 ranks, 96 ranks, 128 ranks, 164 ranks, 192 ranks, 224 ranks and 255 ranks, benchmark gamma curve calculate other corresponding rgb values of 7 grayscale, determine R value under each grayscale, G value and B value point The variable quantity of the corresponding chromaticity coordinates of screen mould group when other one step changes, and test out screen mould group corresponding color under 7 grayscale Coordinate, as shown in table 1 below:
The corresponding rgb value of grayscale, one step chromaticity coordinates variable quantity and the color tested out of 1 benchmark gamma curve of table are sat Mark
With the 7th i.e. the 224th grayscale of debug point for example, control chip issues rgb value corresponding with the 244th rank (219.5625,224,215.1875) corresponding test signal gives screen mould group, and screen mould group is bright according to test signal display color Spend the chromaticity coordinates (Mx of detection device test panel module displays color7,My7), wherein Mx7=0.290, My7=0.288, at this time Mx7- Tx=0.006 > 0.003, Ty-My7=0.008 > 0.003, the difference of chromaticity coordinates and the target color coordinates of setting is greater than at this time Given threshold 0.003, not in claimed range, it is necessary to which the corresponding rgb value of the 224th grayscale of benchmark gamma curve is carried out Correction, so thatSolve above-mentioned equation obtain Δ R be- 3.0625, Δ G are 0, and Δ B is -3.9375, and so the RGB after correction is (216.5000,224,211.2500), issue correction The corresponding test signal of rgb value afterwards gives screen mould group, and the chromaticity coordinates that test obtains screen mould group is (0.287,0.294), this color is sat Mark and the difference of target color coordinates are (0.003,0.002), meet (0.284 ± 0.003,0.296 ± 0.003) this range, The corresponding Gamma point correction of such 224th grayscale finishes.
And so on, obtain the rgb value after 32 ranks, 64 ranks, 96 ranks, 128 ranks, 164 ranks, 192 ranks and 224 ranks correct respectively And the chromaticity coordinates tested out, all rgb values adjusted and the corresponding chromaticity coordinates value tested out are as shown in table 2 below.
The rgb value adjusted of table 2 and the corresponding chromaticity coordinates value tested out
Debug point n N=1 N=2 N=3 N=4 N=5 N=6 N=7 N=8
Grayscale 32 64 96 128 164 192 224 255
R value adjusted 30 64 92 128 159.5000 185 216.5000 250
G value adjusted 32 64 96 128 160 192 224 255
B value adjusted 29.5000 59.5000 89.5000 120.2500 150 180.5000 211.2500 245
Chromaticity coordinates x value after adjustment 0.285 0.283 0.283 0.284 0.283 0.286 0.287 0.286
Chromaticity coordinates y value after adjustment 0.294 0.295 0.295 0.295 0.296 0.295 0.294 0.294
R point, G point and B point are formed in reference axis according to rgb value adjusted and corresponding grayscale, and all R points are carried out Smoothing processing obtains R-curve, is smoothed to obtain the G curve in gamma curve to all G points, and described to have B point to carry out flat Sliding processing obtains the B curve in gamma curve, and so the gamma curve after correction is completed, as shown in Figure 2.After correction In gamma curve write-in control chip.

Claims (10)

1. the automatic gamma curve adjustment method of production line multiple spot, which comprises the steps of:
A. the highest grayscale and at least one grayscale for being less than highest grayscale for choosing initial gamma curve are determined as debug point The variable quantity of the corresponding chromaticity coordinates of screen mould group when RGB distinguishes one step variation under the corresponding grayscale of debug point；
B. it determines the corresponding rgb value of highest grayscale debug point of initial gamma curve, issues corresponding with the rgb value Test signal to screen mould group, the chromaticity coordinates of test panel mould group, judge the target color coordinates of the chromaticity coordinates and setting difference whether Less than or equal to given threshold, if not, it is corresponding to reduce highest grayscale in initial gamma curve according to the variable quantity and difference Rgb value, issue corresponding with rgb value test signal to shielding mould group, the chromaticity coordinates of test panel mould group, up to the chromaticity coordinates It is less than or equal to given threshold with the difference of the target color coordinates of the corresponding grayscale of setting, it is corresponding records highest grayscale adjusted Rgb value sends the debugging of highest grayscale and finishes signal；
C. using the corresponding rgb value of highest grayscale adjusted as vertex, using the line of the vertex and origin as linear benchmark Gamma curve；
D. the corresponding rgb value of other grayscale debug points in addition to highest grayscale debug point is obtained according to benchmark gamma curve, sent out Test signal corresponding with the rgb value gives screen mould group out, and the chromaticity coordinates of test panel mould group judges the chromaticity coordinates and the mesh Whether the difference of mark chromaticity coordinates is less than or equal to given threshold, if not, adjusting benchmark according to corresponding difference and variable quantity The corresponding rgb value of gamma curve, issue it is corresponding with the rgb value test signal to shield mould group, the chromaticity coordinates of test panel mould group, Until the difference of the chromaticity coordinates and target color coordinates is less than or equal to given threshold, the corresponding RGB of the grayscale adjusted is recorded Value sends corresponding grayscale debugging and finishes signal；
E. R point, G point and B point are formed in reference axis according to the rgb value of record and corresponding grayscale, to R point, G point and had respectively B point is smoothed the gamma curve after being corrected.
2. the automatic gamma curve adjustment method of production line multiple spot as described in claim 1, which is characterized in that the step a In, the chromaticity coordinates value for enabling initial testing go out is (Mx, My), and target color coordinates value is (Tx, Ty), then according to the variable quantity and difference The method that value reduces the corresponding rgb value of highest grayscale in initial gamma curve are as follows:
Situation one: as Mx>=Tx and My<Ty, then B value and R value are reduced, G value remains unchanged；
Situation two: as Mx >=Tx and My > Ty, then G value and R value are reduced, B value remains unchanged；
Situation three: as Mx<Tx and My>=Ty, then B value and G value are reduced, R value remains unchanged；
Situation four: as Mx < Tx and My≤Ty, then reducing B value, and R value and G value remain unchanged, until the color tested out after adjustment The x value of coordinate and the x value of target color coordinates are equal, and enabling the chromaticity coordinates value tested out at this time is (Mx1,My1), then there is Mx1=Tx； If My1> Ty and My1The value of-Ty is greater than given threshold, then according to My1The value of-Ty reduces G value accordingly, and R value and B value are kept not Become, until the difference of the corresponding chromaticity coordinates tested out and purpose chromaticity coordinates is less than or equal to given threshold；Otherwise, if My1< Ty and Ty-My1Value be greater than given threshold, then according to Ty-My1Continue to reduce B value, until the y of the chromaticity coordinates tested out after adjusting again Value is equal with the y value of target color coordinates, and enabling the chromaticity coordinates value tested out at this time is (Mx2,My2), then there is My2=Ty, Mx2> Tx, If Mx2The value of-Tx is greater than given threshold, then according to Mx2Low r-value drops in the value of-Tx accordingly, until the corresponding chromaticity coordinates tested out It is less than or equal to given threshold with the difference of purpose chromaticity coordinates.
3. the automatic gamma curve adjustment method of production line multiple spot as claimed in claim 2, which is characterized in that enable highest grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Rx and Ry when lower R value one step changes, and enables G value list under highest grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Gx and Gy when the step change of position, enables B value one step under highest grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Bx and By when variation, then:
In the situation one, B value is reducedR value reduces
In the situation two, G value is reducedR value reduces
In the situation three, B value is reducedG value reduces
In the situation four, as Mx < Tx and My≤Ty, then B value is reduced, B value reduces at this timeWhen according to My1- When the value of Ty reduces G value accordingly, G value is reducedWhen according to Ty-My1When continuing to reduce B value, B value is reducedWhen according to Mx2When low r-value drops in the value of-Tx accordingly, R value is reduced
4. the automatic gamma curve adjustment method of production line multiple spot as described in claim 1, which is characterized in that in the step d According to corresponding difference and the method for the corresponding rgb value of variable quantity adjustment benchmark gamma curve are as follows: enable selection is lower than most high ash The grayscale number of rank is n, obtains the rgb value under corresponding grayscale according to benchmark gamma curve, is denoted as (Rn,Gn,Bn), enable issue with The chromaticity coordinates value tested out when the corresponding test signal of the rgb value is to screen mould group is (Mxn,Myn), target color coordinates value is (Tx, Ty), enabling the variable quantity of screen mould group corresponding chromaticity coordinates xy when R value one step changes under corresponding grayscale is RxnAnd Ryn, enable The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is Gx when G value one step changes under corresponding grayscalenAnd Gyn, enable under corresponding grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is Bx when B value one step changesnAnd Byn, R value, G value and B value is enabled to need to adjust Whole variable quantity is respectively Δ R, Δ G and Δ B, given threshold d, then:
It solves above-mentioned equation and obtains qualified Δ R, Δ G and Δ B, then the corresponding rgb value difference of the grayscale adjusted For Rn+ Δ R, Gn+ Δ G and Bn+ΔB。
5. the automatic gamma curve adjustment method of production line multiple spot as described in claim 1, which is characterized in that the step d In, if after the corresponding rgb value of grayscale described in adjustment benchmark gamma curve, issuing signal of testing corresponding with the rgb value to screen Mould group, the chromaticity coordinates for testing out screen mould group is still greater than with the minimum value of the difference of the target color coordinates of the corresponding grayscale of setting to be set Determine threshold value, then the chromaticity coordinates of the screen mould group is subtracted into given threshold as setting deviation, it is corresponding to record the minimum value The debugging of rgb value, corresponding grayscale terminates.
6. the automatic gamma curve debugging system of production line multiple spot, which is characterized in that including means for correcting, television set to be corrected and Luminance detection device, is provided with control chip and screen mould group in television set to be corrected, the means for correcting connection control chip and Luminance detection device, control chip connection screen mould group, screen mould group are corresponding with luminance detection device；
It controls chip and gives screen mould group for issuing test signal corresponding with rgb value；
The screen mould group is used for according to the test signal display color；
The luminance detection device is used for the chromaticity coordinates of test panel module displays color；
The means for correcting is used to choose the highest grayscale of initial gamma curve and at least one grayscale for being less than highest grayscale is made For debug point, the variation of screen mould group corresponding chromaticity coordinates when RGB distinguishes one step variation under the corresponding grayscale of debug point is determined Amount；Determine that the corresponding rgb value of highest grayscale debug point, notice control chip issue test letter corresponding with the rgb value Number to screen mould group, obtain luminance detection device test out screen mould group chromaticity coordinates, then judge the mesh of the chromaticity coordinates and setting Whether the difference of mark chromaticity coordinates is less than or equal to given threshold, if not, reducing initial Gamma according to the variable quantity and difference The corresponding rgb value of highest grayscale in curve, notice control chip issue test signal corresponding with the rgb value and give screen mould group, The chromaticity coordinates for obtaining the screen mould group that luminance detection device tests out, until the chromaticity coordinates is sat with the aim colour of the corresponding grayscale of setting Target difference is less than or equal to given threshold, records the corresponding rgb value of highest grayscale adjusted；
The means for correcting is also used to using the corresponding rgb value of highest grayscale adjusted as vertex, with the company on the vertex and origin Line obtains other grey contrasts in addition to highest grayscale debug point according to benchmark gamma curve as linear benchmark gamma curve The corresponding rgb value of pilot, notice control chip issue test signal corresponding with the rgb value and give screen mould group, obtain bright The chromaticity coordinates for the screen mould group that degree detection device tests out, judges whether the chromaticity coordinates and the difference of the target color coordinates are less than In given threshold, if not, according to corresponding difference and the corresponding rgb value of variable quantity adjustment benchmark gamma curve, notice control Coremaking piece issues signal of testing corresponding with the rgb value and gives screen mould group, obtains the color for the screen mould group that luminance detection device tests out It is corresponding to record the grayscale adjusted until the difference of the chromaticity coordinates and target color coordinates is less than or equal to given threshold for coordinate Rgb value；R point, G point and B point are formed in reference axis according to the rgb value of record and corresponding grayscale, respectively to R point, G point and There is B point to be smoothed the gamma curve after being corrected, by the gamma curve write-in control chip after correction.
7. the automatic gamma curve debugging system of production line multiple spot as claimed in claim 6, which is characterized in that the correction dress It sets including correction module one, correction module one is for then reducing initial Gamma according to the corresponding variable quantity of highest grayscale and difference Corresponding rgb value in curve, even the chromaticity coordinates value that initial testing goes out when highest grayscale is (Mx, My), target color coordinates value is (Tx, Ty), then judge:
Situation one: as Mx>=Tx and My<Ty, then B value and R value are reduced, G value remains unchanged；
Situation two: as Mx >=Tx and My > Ty, then G value and R value are reduced, B value remains unchanged；
Situation three: as Mx<Tx and My>=Ty, then B value and G value are reduced, R value remains unchanged；
Situation four: as Mx < Tx and My≤Ty, then reducing B value, and R value and G value remain unchanged, until the color tested out after adjustment The x value of coordinate and the x value of target color coordinates are equal, and enabling the chromaticity coordinates value tested out at this time is (Mx1,My1), then there is Mx1=Tx； If My1> Ty and My1The value of-Ty is greater than given threshold, then according to My1The value of-Ty reduces G value accordingly, and R value and B value are kept not Become, until the difference of the corresponding chromaticity coordinates tested out and purpose chromaticity coordinates is less than or equal to given threshold；Otherwise, if My1< Ty and Ty-My1Value be greater than given threshold, then according to Ty-My1Continue to reduce B value, until the y of the chromaticity coordinates tested out after adjusting again Value is equal with the y value of target color coordinates, and enabling the chromaticity coordinates value tested out at this time is (Mx2,My2), then there is My2=Ty, Mx2> Tx, If Mx2The value of-Tx is greater than given threshold, then according to Mx2Low r-value drops in the value of-Tx accordingly, until the corresponding chromaticity coordinates tested out It is less than or equal to given threshold with the difference of purpose chromaticity coordinates.
8. the automatic gamma curve debugging system of production line multiple spot as claimed in claim 7, which is characterized in that the straightening die Block one further includes decreasing value computing module, and the decreasing value computing module is used for: when enabling R value one step variation under highest grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is respectively Rx and Ry, enables screen mould group when G value one step changes under highest grayscale The variable quantity of corresponding chromaticity coordinates xy is respectively Gx and Gy, enables screen mould group when B value one step changes under highest grayscale corresponding The variable quantity of chromaticity coordinates xy is respectively Bx and By, then:
In the situation one, B value is reducedR value reduces
In the situation two, G value is reducedR value reduces
In the situation three, B value is reducedG value reduces
In the situation four, as Mx < Tx and My≤Ty, then B value is reduced, B value reduces at this timeWhen according to My1- When the value of Ty reduces G value accordingly, G value is reducedWhen according to Ty-My1When continuing to reduce B value, B value is reducedWhen according to Mx2When low r-value drops in the value of-Tx accordingly, R value is reduced
9. the automatic gamma curve debugging system of production line multiple spot as claimed in claim 6, which is characterized in that the correction dress Setting further includes correction module two, the correction module two be used for according to the corresponding difference of the grayscale in addition to highest grayscale of selection and Variable quantity adjusts the corresponding rgb value of benchmark gamma curve, it may be assumed that and the grayscale number lower than highest grayscale for enabling selection is n, according to Benchmark gamma curve obtains the rgb value of corresponding grayscale, is denoted as (Rn,Gn,Bn), it enables and issues test corresponding with the rgb value The chromaticity coordinates value tested out when signal is to screen mould group is (Mxn,Myn), target color coordinates value is (Tx, Ty), enables R under corresponding grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is Rx when being worth one step variationnAnd Ryn, enable G value one step under corresponding grayscale The variable quantity of the corresponding chromaticity coordinates xy of screen mould group is Gx when variationnAnd Gyn, enable screen mould when B value one step changes under corresponding grayscale The variable quantity of the corresponding chromaticity coordinates xy of group is BxnAnd Byn, the variable quantity for enabling the needs of R value, G value and B value adjust be respectively Δ R, Δ G and Δ B, given threshold d, then:
It solves above-mentioned equation and obtains qualified Δ R, Δ G and Δ B, then the corresponding rgb value difference of the grayscale adjusted For Rn+ Δ R, Gn+ Δ G and Bn+ΔB。
10. the automatic gamma curve debugging system of production line multiple spot as claimed in claim 6, which is characterized in that the straightening die Block two further includes deviation compensation module, and the deviation compensation module is used for corresponding when adjusting grayscale described in benchmark gamma curve Rgb value, control chip issue it is corresponding with the rgb value test signal to shield mould group, the screen mould that luminance detection device tests out It, will be described when given threshold is still greater than with the minimum value of the difference of the target color coordinates of the corresponding grayscale of setting in the chromaticity coordinates of group The chromaticity coordinates of screen mould group subtracts given threshold as setting deviation, records the corresponding rgb value of the minimum value, corresponding grayscale Debugging terminates.
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109949744A (en) * 2019-04-17 2019-06-28 京东方科技集团股份有限公司 Gamma electric voltage bearing calibration and device
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CN111798785A (en) * 2020-06-30 2020-10-20 上海摩勤智能技术有限公司 Debugging method, electronic device and storage medium
CN112185317A (en) * 2020-08-17 2021-01-05 深圳市广和通无线股份有限公司 Color calibration method, device, computer equipment and storage medium
WO2021056315A1 (en) * 2019-09-26 2021-04-01 京东方科技集团股份有限公司 Gamma tuning method, gamma tuning apparatus, and gamma tuning system
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI557721B (en) * 2015-05-15 2016-11-11 瑞鼎科技股份有限公司 Gamma curve correction circuit and gamma curve correction method
CN106373527A (en) * 2016-11-11 2017-02-01 武汉精测电子技术股份有限公司 Maximum and minimum gray scale gamma and color temperature automatic adjusting method
CN106409212A (en) * 2016-12-12 2017-02-15 深圳Tcl数字技术有限公司 Gamma curve adjustment method and device
CN106507082A (en) * 2016-12-27 2017-03-15 深圳Tcl数字技术有限公司 The adjustment method of white balance and device
CN107146565A (en) * 2017-04-26 2017-09-08 广州视源电子科技股份有限公司 Method and device for calibrating Gamma curve of display based on DICOM curve
US10078998B2 (en) * 2015-08-06 2018-09-18 Novatek Microelectronics Corp. Gamma curve and color coordinate adjusting apparatus and adjusting method thereof
US20190325821A1 (en) * 2018-04-24 2019-10-24 Samsung Display Co., Ltd. Gamma correction device for a display device, gamma correction method for a display device, and display device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI557721B (en) * 2015-05-15 2016-11-11 瑞鼎科技股份有限公司 Gamma curve correction circuit and gamma curve correction method
US10078998B2 (en) * 2015-08-06 2018-09-18 Novatek Microelectronics Corp. Gamma curve and color coordinate adjusting apparatus and adjusting method thereof
CN106373527A (en) * 2016-11-11 2017-02-01 武汉精测电子技术股份有限公司 Maximum and minimum gray scale gamma and color temperature automatic adjusting method
CN106409212A (en) * 2016-12-12 2017-02-15 深圳Tcl数字技术有限公司 Gamma curve adjustment method and device
CN106507082A (en) * 2016-12-27 2017-03-15 深圳Tcl数字技术有限公司 The adjustment method of white balance and device
CN107146565A (en) * 2017-04-26 2017-09-08 广州视源电子科技股份有限公司 Method and device for calibrating Gamma curve of display based on DICOM curve
US20190325821A1 (en) * 2018-04-24 2019-10-24 Samsung Display Co., Ltd. Gamma correction device for a display device, gamma correction method for a display device, and display device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109979390A (en) * 2019-04-09 2019-07-05 京东方科技集团股份有限公司 A kind of Gamma bearing calibration, equipment and system, medium
CN109949744A (en) * 2019-04-17 2019-06-28 京东方科技集团股份有限公司 Gamma electric voltage bearing calibration and device
CN109949744B (en) * 2019-04-17 2021-04-27 京东方科技集团股份有限公司 Gamma voltage correction method and device
CN110189667A (en) * 2019-06-04 2019-08-30 深圳市华星光电技术有限公司 A kind of display verification method
CN110189667B (en) * 2019-06-04 2022-04-26 Tcl华星光电技术有限公司 Display verification method
WO2021056315A1 (en) * 2019-09-26 2021-04-01 京东方科技集团股份有限公司 Gamma tuning method, gamma tuning apparatus, and gamma tuning system
CN111223466A (en) * 2020-01-21 2020-06-02 Tcl华星光电技术有限公司 Color correction method for display
CN111798785A (en) * 2020-06-30 2020-10-20 上海摩勤智能技术有限公司 Debugging method, electronic device and storage medium
CN112185317A (en) * 2020-08-17 2021-01-05 深圳市广和通无线股份有限公司 Color calibration method, device, computer equipment and storage medium
CN112735316A (en) * 2020-12-31 2021-04-30 昇显微电子(苏州)有限公司 Gamma debugging method and system for display panel
CN113327552A (en) * 2021-06-21 2021-08-31 合肥维信诺科技有限公司 Gamma debugging method and device, electronic equipment and storage medium
CN113327552B (en) * 2021-06-21 2022-05-17 合肥维信诺科技有限公司 Gamma debugging method and device, electronic equipment and storage medium

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