CN108877736A - Eliminate compensation method and the device of screen body brightness disproportionation - Google Patents
Eliminate compensation method and the device of screen body brightness disproportionation Download PDFInfo
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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
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Abstract
The present invention provides a kind of compensation method for eliminating screen body brightness disproportionation and devices, solve luminance compensation data inaccuracy, the poor problem of screen body brightness uniformity.This method includes：Acquisition screen body corresponds to the respective brightness data of multiple and different grayscale under various levels of brightness mode；Screen body is obtained according to brightness data collected, and the respective luminance compensation data of multiple and different grayscale are corresponded under various levels of brightness mode；It is fitted according to the luminance compensation data of acquisition and shields penalty function corresponding to body each grayscale in multiple and different grayscale；Luminance compensation data of the screen body under any one luminance patterns are calculated according to penalty function.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of to eliminate the compensation method for shielding body brightness disproportionation and device.
Background technique
For display panel due to production technology complexity, control difficulty is big, is easy to appear brightness during production and shows not
Uniform phenomenon, also referred to as Mura phenomenon, the i.e. block-like trace in some region area as caused by the difference of display brightness of panel
Phenomenon, and then influence the image displaying quality of screen body.
At present for Mura defects, mainly eliminated by Demura technology.Specifically, when performing image display
The brightness of image is compensated, usually the grayscale of the pixel in region brighter on display screen is mended multiplied by a lesser brightness
Repay coefficient, be darker region pixel grayscale multiplied by a biggish luminance compensation coefficient so that the brightness of brighter areas
It reduces, the brightness of darker area increases, so as to improve the Mura phenomenon on display screen to reduce to caused by image displaying quality
Influence.
Brightness is compensated in the prior art, certain luminance patterns is mainly acquired (as being just always on by Demura equipment
Degree mode) under each pixel in the brightness data of different grayscale, it is corresponding bright that each pixel of the panel is then generated by algorithm
Offset data is spent, to compensate processing to display picture to achieve the purpose that eliminate screen body Mura.But this method is true
Fixed luminance compensation data are determined under a kind of luminance patterns, and in actual displayed, different luminance patterns (such as just
Normal luminance patterns or hi-bright mode) under brightness corresponding to same gray level and different, corresponding to offset data be also different
Sample, thus the Mura offset data obtained in one mode only compensated under the luminance patterns it is just most accurate, with
It goes to compensate the brightness under other luminance patterns to be to be unable to satisfy the demand of display effect.It can thus be seen that this method can band
Come different luminance patterns under offset data inaccuracy problem, and then cause when displaying an image there are still shield body brightness uniformity
Poor phenomenon influences to show quality.
Summary of the invention
In view of this, the embodiment of the present invention is dedicated to providing a kind of compensation method for eliminating screen body brightness disproportionation and device,
It is bright to shield body as the inaccuracy of offset data brought by luminance compensation data for a kind of data to solve to obtain under luminance patterns
Spend the still poor problem of uniformity.
One aspect of the present invention provides a kind of compensation method for eliminating screen body brightness disproportionation, including：Acquisition screen body is a variety of
The respective brightness data of multiple and different grayscale is corresponded under luminance patterns；Screen body is obtained a variety of bright according to brightness data collected
The respective luminance compensation data of multiple and different grayscale are corresponded under degree mode；Screen body is fitted according to the luminance compensation data of acquisition to exist
Penalty function corresponding to each grayscale in multiple and different grayscale；Screen body is calculated in any one luminance patterns according to penalty function
Under luminance compensation data；And luminance compensation is carried out to screen body according to resulting luminance compensation data are calculated.
In one embodiment, screen body corresponding penalty function under each grayscale passes through with various levels of brightness under each grayscale
One of mode luminance patterns are benchmark luminance patterns, and the luminance compensation data under reference brightness mode is combined to be fitted
Out, wherein reference brightness mode is other luminance patterns in various levels of brightness mode in addition to Benchmark brightness mode；Any one is bright
Luminance compensation data under degree mode pass through formula D (g, n ')=D (g, l)+Fg* [(n '-l)/100] is calculated, wherein g
For the corresponding current gray of screen body, n ' is the target brightness value of luminance patterns to be compensated, and l is that the target of benchmark luminance patterns is bright
Angle value, D (g, n ') are the luminance compensation data under luminance patterns to be compensated, and D (g, l) is that the brightness under benchmark luminance patterns is mended
Repay data, FgThe penalty function of current gray g is corresponded to for screen body.
In one embodiment, penalty function FgEach benefit of current gray g is corresponded under each reference brightness mode for screen body
Repay subfunction fgAverage value；fg=100 (D (g, n)-D (g, l))/(n-l), wherein n is the object brightness of reference brightness mode
Value, D (g, n) are the luminance compensation data under reference brightness mode.
In one embodiment, brightness data is the set for shielding the reality output brightness value of internal all pixels point, brightness
Offset data is to shield the set of the penalty coefficient of internal all pixels point；Screen body is obtained a variety of according to brightness data collected
The respective luminance compensation data of multiple and different grayscale are corresponded under luminance patterns includes：That detects each pixel actually enters grayscale
Value；Determine the practical gamma curve value of screen body, and according to the determining target brightness value pair with luminance patterns of practical gamma curve value
The target input grayscale value answered；Pass through fitting formula g2=a*g1+ b actually enters grayscale value and mesh to each pixel respectively
Mark input grayscale value is fitted to obtain the penalty coefficient of all pixels point, wherein g2Grayscale value, g are inputted for target1For picture
Vegetarian refreshments actually enters grayscale value, and a and b are penalty coefficient.
Another aspect of the present invention provides a kind of compensation device for eliminating screen body brightness disproportionation, including：Acquisition module is used for
Acquisition screen body corresponds to the respective brightness data of multiple and different grayscale under various levels of brightness mode；Module is obtained, for according to acquisition
The brightness data of module acquisition obtains screen body and corresponds to the respective luminance compensation data of multiple and different grayscale under various levels of brightness mode；
Fitting module, for fitting screen body each grayscale in multiple and different grayscale according to the luminance compensation data for obtaining module acquisition
Corresponding penalty function；Computing module, for calculating brightness of the screen body under any one luminance patterns according to penalty function
Offset data；And compensating module, luminance compensation is carried out to screen body for calculating resulting luminance compensation data according to computing module.
In one embodiment, screen body corresponding penalty function under each grayscale passes through with various levels of brightness under each grayscale
One of mode luminance patterns are benchmark luminance patterns, and the luminance compensation data under reference brightness mode is combined to be fitted
Out, wherein reference brightness mode is other luminance patterns in various levels of brightness mode in addition to Benchmark brightness mode；Any one is bright
Luminance compensation data under degree mode pass through formula D (g, n ')=D (g, l)+Fg* [(n '-l)/100] is calculated, wherein g
For the corresponding current gray of screen body, n ' is the target brightness value of luminance patterns to be compensated, and l is that the target of benchmark luminance patterns is bright
Angle value, D (g, n ') are the luminance compensation data under luminance patterns to be compensated, and D (g, l) is that the brightness under benchmark luminance patterns is mended
Repay data, FgThe penalty function of current gray g is corresponded to for screen body.
In one embodiment, penalty function FgEach benefit of current gray g is corresponded under each reference brightness mode for screen body
Repay subfunction fgAverage value；fg=100 (D (g, n)-D (g, l))/(n-l), wherein n is the object brightness of reference brightness mode
Value, D (g, n) are the luminance compensation data under reference brightness mode.
In one embodiment, brightness data is the set for shielding the reality output brightness value of internal all pixels point, brightness
Offset data is to shield the set of the penalty coefficient of internal all pixels point；Obtaining module includes：Detection unit, it is each for detecting
Pixel actually enters grayscale value；Determination unit, for determining the practical gamma curve value of screen body, and it is bent according to practical gamma
Line value determines that target corresponding with the target brightness value of luminance patterns inputs grayscale value；Fitting unit, for passing through fitting formula
g2=a*g1+ b respectively to each pixel actually enter grayscale value and target input grayscale value be fitted to obtain all pictures
The penalty coefficient of vegetarian refreshments, wherein g2Grayscale value, g are inputted for target1For the grayscale value that actually enters of pixel, a and b are compensation system
Number.
The embodiment of the invention also provides a kind of computer equipment, including memory, processor and it is stored in memory
On the computer program that is executed by processor, the step of processor realizes either method as above when executing computer program.
The embodiment of the invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, calculate
The step of machine program realizes either method as above when being executed by processor.
The compensation method provided in an embodiment of the present invention for eliminating screen body brightness disproportionation, acquisition screen body is in various levels of brightness mould first
The respective brightness data of multiple and different grayscale is corresponded under formula, then according to brightness data collected, by backoff algorithm and
Demura equipment obtains screen body and corresponds to the respective luminance compensation data of multiple and different grayscale under these luminance patterns, further according to institute
The luminance compensation data of acquisition fit penalty function corresponding to the screen each grayscale of body, can be calculated by this functional relation
Screen body corresponds to the luminance compensation data of any one above-mentioned grayscale under any one luminance patterns.The embodiment of the present invention is sufficiently examined
Consider this actual conditions of the difference of brightness corresponding to same gray level under different luminance patterns, is identical ash under different luminance patterns
Rank provides different luminance compensation data, improves the accuracy of luminance compensation data, efficiently solves luminance compensation data
For the problem that actual displayed image caused by definite value is poor there are still brightness uniformity, and then improve display effect.In addition,
Relationship between luminance compensation data under same grayscale difference luminance patterns is mapped to by method provided in an embodiment of the present invention
In penalty function corresponding to the grayscale, as long as so that storing the brightness under selected Benchmark brightness mode in later period storage
Penalty function corresponding to offset data and the grayscale, compared to the institute for corresponding to this grayscale under the multiple luminance patterns of storage
There is offset data, not only substantially reduce memory space, but also its applicability is also stronger, can preferably be suitable for a variety of common
The compensation of luminance patterns, to brightness value, there is no limit.
Detailed description of the invention
Fig. 1 show a kind of flow chart of the compensation method of elimination screen body brightness disproportionation of one embodiment of the invention offer.
Fig. 2 show the specific flow chart of step 102 in Fig. 1.
Fig. 3 show a kind of structural representation of the compensation device of elimination screen body brightness disproportionation of one embodiment of the invention offer
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Fig. 1 show a kind of flow chart of the compensation method of elimination screen body brightness disproportionation of one embodiment of the invention offer.
As shown in Figure 1, this method includes：
Step 101：Acquisition screen body corresponds to the respective brightness data of multiple and different grayscale under various levels of brightness mode.
It will be understood to those skilled in the art that the screen body of display equipment generally has various levels of brightness mode, such as just it is always on
Degree mode, hi-bright mode and low bright mode etc., and show that the pixel in image can have different grayscale, such as 16 grayscale, 32 ashes
Rank, 64 grayscale, 96 grayscale, 128 grayscale or 192 grayscale etc..The present embodiment chooses various levels of brightness mode, and it is bright to acquire these respectively
The respective brightness data of multiple and different grayscale is corresponded under degree mode, specifically, such as can acquire respectively target using 100nit as step-length
Brightness value (being respectively 250nit, 350nit, 450nit, 550nit and 650nit) corresponding ash between 250nit to 650nit
Rank is respectively the brightness data of 16 grayscale, 32 grayscale, 64 grayscale, 96 grayscale, 128 grayscale and 192 grayscale.
In an embodiment of the present invention, which is the collection for shielding the reality output brightness value of internal all pixels point
It closes, it will be understood to those skilled in the art that a pixel generally comprises multiple sub-pixels, it such as include three sub- pictures of RGB
Element, the set on the collective entity to shield the reality output brightness value of all sub-pixel points in vivo.The brightness data can be by
Demura equipment is acquired, for example, need Demura equipment carry out respectively 250nit, 350nit, 450nit, 550nit and
The brightness data of corresponding 16 grayscale, 32 grayscale, 64 grayscale, 96 grayscale, 128 grayscale and 192 grayscale under 650nit luminance patterns
It acquires (each pixel includes three sub-pixels of RGB), then the size of the data volume acquired under each luminance patterns is
(Hsize*6*3) × Vsize is a matrix, wherein Hsize and Vsize respectively represents in screen body horizontal direction and vertical
Number of pixels on direction, 6 and 3 respectively represent the number for the sub-pixel for including in sampling grayscale number and each pixel.
In an embodiment of the present invention, Demura equipment, which can convert the reality output brightness value of acquisition to, itself facilitates meter
The luminance factor of calculation, such as preset target brightness value is 350nit, and the reality that Demura equipment collects some sub-pixel is defeated
Brightness value is 330nit out, then Demura equipment can be translated into coefficient 0.94 (330nit/350nit ≈ 0.94), this also says
The reality output brightness value that the sub-pixel is illustrated is not up to preset luminance standard.
Step 102：Screen body is obtained according to brightness data collected, and multiple and different grayscale are corresponded under various levels of brightness mode
Respective luminance compensation data.
In an embodiment of the present invention, luminance compensation data are to shield the set of the penalty coefficient of internal all pixels point, should
Pixel equally may include multiple sub-pixel points.The luminance compensation data can be obtained by the way that backoff algorithm and Demura equipment are common
Out, wherein backoff algorithm mainly utilizes gamma curve principle, and the data that Demura equipment can be obtained according to backoff algorithm are each
Sub-pixel point automatic Fitting goes out corresponding penalty coefficient.
In an embodiment of the present invention, as shown in Fig. 2, the step 102 may particularly include following steps：
Step 1021：That detects each pixel actually enters grayscale value；
Step 1022：Determine the practical gamma curve value of screen body, and according to practical gamma curve value determination and luminance patterns
The corresponding target of target brightness value input grayscale value；
It will be understood to those skilled in the art that each sub-pixel point of each screen body corresponding one actually enters grayscale
Value (i.e. the objective physical quantity of things of computer identification) and a reality output brightness value (i.e. human eye brightness is experienced), it
Between have nonlinear mapping relations, can be characterized by gamma curve.This mapping relations are also referred to as
Gamma mathematical model usually acquiescently exports brightness=input grayscale Gamma with formula to indicate.
In the acquisition process of offset data in the prior art, usually to shield body for the Gamma of standard 2.2
It is calculated, but in actual production, the gamma curve value of each display screen is difficult to accomplish accurately to manage, so with
The offset data that the mode of this default Gamma value obtains will affect final effect.In the present embodiment, by step 101
The reality output brightness value and step 1021 of each sub-pixel point of acquisition detect the obtained relationship actually entered between grayscale value,
The practical gamma curve value of the available screen body carries out subsequent calculating in very great Cheng further according to the practical gamma curve value
The accuracy of luminance compensation data is improved on degree.
Assuming that screen body includes N number of sub-pixel point, then according to the reality output brightness value of each sub-pixel point and actually entering
Relationship between grayscale value can calculate N number of gamma curve value.It in an embodiment of the present invention, can be with this N number of gamma curve value
Practical gamma curve value of the average value as the screen body.It in other embodiments, can also counting with this N number of gamma curve value
Practical gamma curve value of the square value as screen body；Or resulting gamma curve value is calculated to shield the sub-pixel of body central point
As the practical gamma curve value of screen body, because the central point for shielding body is optics usually during actual production display screen
Sample best region.For the specific value mode of gamma curve value, those skilled in the art can according to actual needs and
Make different set, the present invention is not especially limited this.
Because preset target brightness value is known under various luminance patterns, the mesh of body is shielded such as under normal brightness mode
Marking brightness value is then 350nit, so bright by the practical gamma curve value of above-mentioned determination and the target under certain luminance patterns
The target input grayscale value corresponding with target brightness value of the screen body under this luminance patterns can be obtained in relationship between angle value.
In the actual implementation process, can acquisition to corresponding to multiple grayscale under every kind of luminance patterns and compensating data, this is just needed
All carry out corresponding to the above-mentioned calculating of variant grayscale under every kind of luminance patterns.
Step 1023：Pass through fitting formula g2=a*g1+ b actually enters grayscale value and target to each pixel respectively
Input grayscale value is fitted to obtain the penalty coefficient of all pixels point, wherein g2Grayscale value, g are inputted for target1For pixel
Point actually enters grayscale value, and a and b are penalty coefficient.
Grayscale value g is inputted by the target that above-mentioned backoff algorithm obtains screen body2Ash is actually entered with each sub-pixel point
Rank value g1Afterwards, Demura equipment can be according to fitting formula g2=a*g1+ b is that each sub-pixel point automatic Fitting goes out respectively accordingly
Penalty coefficient a and b, wherein a represents the gain of grayscale value, and b then represents deviation.
The set of the penalty coefficient a and b of above-mentioned each sub-pixel point constitute screen body and correspond to certain under certain luminance patterns
The luminance compensation data of a grayscale, the offset data can indicate that wherein m represents the grayscale of screen body by D (m, n), and m represents pre-
If target brightness value.It is still corresponding under five kinds of luminance patterns of 250nit, 350nit, 450nit, 550nit and 650nit to obtain
The luminance compensation data instance of 16 grayscale, 32 grayscale, 64 grayscale, six kinds of 96 grayscale, 128 grayscale and 192 grayscale grayscale, then finally
Obtained luminance compensation data can be expressed as shown in table 1：
The luminance compensation data that different grayscale are corresponded under each luminance patterns of table 1 indicate
By taking normal brightness mode (target brightness value 350nit) as an example, the total size of luminance compensation data is also
(Hsize*6*3) × Vsize is a matrix, wherein Hsize and Vsize respectively represents in screen body horizontal direction and vertical
Number of pixels on direction, 6 and 3 respectively represent the number for the sub-pixel for including in sampling grayscale number and each pixel.
Step 103：It is fitted according to the luminance compensation data of acquisition and shields penalty function corresponding to each grayscale of body.
In an embodiment of the present invention, penalty function corresponding to each grayscale is with one of above-mentioned various levels of brightness mode
Luminance patterns are benchmark luminance patterns, and combine other luminance patterns (can be described as reference brightness mode) in these luminance patterns
Under luminance compensation data fitting obtain.
Specifically, in one embodiment, penalty function FgIt can be corresponding current grey under each reference brightness mode for screen body
Each compensation subfunction f of rank ggAverage value, in other embodiments, penalty function FgIt can also be each compensation subfunction fgCalculation
Number average value, the present invention are not construed as limiting the physical relationship the two.
Compensate subfunction fgSimilar to a proportion function, in an embodiment of the present invention, subfunction f is compensatedg=100 (D
(g, n)-D (g, l))/(n-l), wherein g is the corresponding current gray of screen body, and n is the target brightness value of reference brightness mode, l
For the target brightness value of benchmark luminance patterns, D (g, n) is the luminance compensation data under reference brightness mode, on the basis of D (g, l)
Luminance compensation data under luminance patterns.
For example, for the luminance patterns (normal brightness mode) of 350nit being benchmark luminance patterns with target brightness value, with mesh
Mark brightness value is that the luminance patterns of 250nit, 450nit, 550nit and 650nit are reference brightness mode, then shields body corresponding 128
Each compensation subfunction f of grayscale128It can be with D (128,350) for benchmark data, in conjunction with D (128,250), D (128,450), D
(128,550) it is obtained with D (128,650) fitting.Specifically, target brightness value is compensation subfunction corresponding to 250nit
f128,250Functional relation f can be passed through128,250=100 (D (128,250)-D (128,350))/(250-350) are calculated, together
Reason, target brightness value are compensation subfunction f corresponding to 450nit128,450Relational expression f can be passed through128,450=100 (D (128,
450) (128,350)-D)/(450-350) be calculated, target brightness value is compensation subfunction f corresponding to 550nit128,550
Relational expression f can be passed through128,550=100 (D (128,550)-D (128,350))/(550-350) are calculated, and target brightness value is
Compensation subfunction f corresponding to 650nit128,650Relational expression f can be passed through128,650=100 (D (128,650)-D (128,
350))/(650-350), thus according to f128,250, f128,450, f128,550And f128,650Corresponding 128 grayscale of screen body can be obtained
Penalty function F128.Same reason, in addition the penalty function F of five grayscale192、F96、F64、F32And F16It can also be by above-mentioned
Method is calculated.
Step 104：Luminance compensation data of the screen body under any one luminance patterns are calculated according to penalty function.
Obtain penalty function F corresponding to above-mentioned a certain grayscalegIt afterwards, can be according to this penalty function FgObtain the grayscale pair
Luminance compensation data under any one luminance patterns answered.Specifically, the luminance compensation data under any one luminance patterns
Formula D (g, n ')=D (g, l)+F can be passed throughg* [(n '-l)/100] is calculated, wherein and g is the corresponding current gray of screen body,
N ' is the target brightness value of luminance patterns to be compensated, and l is the target brightness value of benchmark luminance patterns, and D (g, n ') is to be compensated
Luminance patterns under luminance compensation data, D (g, l) be benchmark luminance patterns under luminance compensation data.For example, still with target
The luminance patterns (normal brightness mode) that brightness value is 350nit are benchmark luminance patterns, calculate screen body in target brightness value and are
It, only need to be by n '=200nit and penalty function F when corresponding to the luminance compensation data of grayscale 128 when 200nit128Bring above-mentioned public affairs into
Formula, it is D (128,350)+F that corresponding luminance compensation data D (128,200), which can be obtained,128*[(200-350)/100]。
Step 105：Luminance compensation is carried out to screen body according to resulting luminance compensation data are calculated.
In this step, resulting luminance compensation data and existing brightness mura compensation method are calculated according to step 104
Luminance compensation is carried out to screen body to be compensated.
The compensation method provided in an embodiment of the present invention for eliminating screen body brightness disproportionation, acquisition screen body is in various levels of brightness mould first
The respective brightness data of multiple and different grayscale is corresponded under formula, then according to brightness data collected, by backoff algorithm and
Demura equipment obtains screen body and corresponds to these respective luminance compensation data of different grayscale under these luminance patterns, further according to institute
The luminance compensation data of acquisition fit penalty function corresponding to the screen each grayscale of body, can be calculated by this functional relation
Screen body corresponds to the luminance compensation data of any one above-mentioned grayscale under any one luminance patterns.The embodiment of the present invention is sufficiently examined
Consider this actual conditions of the difference of brightness corresponding to same gray level under different luminance patterns, is identical ash under different luminance patterns
Rank provides different luminance compensation data, improves the accuracy of luminance compensation data, efficiently solves luminance compensation data
For the problem that actual displayed image caused by definite value is poor there are still brightness uniformity, and then improve display effect.In addition,
Relationship between luminance compensation data under same grayscale difference luminance patterns is mapped to by method provided in an embodiment of the present invention
In penalty function corresponding to the grayscale, as long as so that storing the brightness under selected Benchmark brightness mode in later period storage
Penalty function corresponding to offset data and the grayscale, compared to the institute for corresponding to this grayscale under the multiple luminance patterns of storage
There is offset data, not only substantially reduce memory space, but also its applicability is also stronger, can preferably be suitable for a variety of common
The compensation of luminance patterns, to brightness value, there is no limit.
Fig. 3 show a kind of structural representation of the compensation device of elimination screen body brightness disproportionation of one embodiment of the invention offer
Figure.As shown in figure 3, the device includes acquisition module 10, obtains module 20, fitting module 30, computing module 40 and compensating module
50。
Acquisition module 10 corresponds to the respective brightness data of multiple and different grayscale for acquiring screen body under various levels of brightness mode.
In an embodiment of the present invention, which is the collection for shielding the reality output brightness value of internal all pixels point
It closes, it will be understood to those skilled in the art that a pixel generally comprises multiple sub-pixels, so being screen body on the collective entity
The set of the reality output brightness value of interior all sub-pixel points.The acquisition module 10 concretely Demura equipment, for example, it is desired to
Demura equipment carries out corresponding 16 grayscale, 32 under 250nit, 350nit, 450nit, 550nit and 650nit luminance patterns respectively
(each pixel includes three sons of RGB for the acquisition of the brightness data of grayscale, 64 grayscale, 96 grayscale, 128 grayscale and 192 grayscale
Pixel), then it is a matrix that the size of the data volume acquired under each luminance patterns, which is (Hsize*6*3) × Vsize,
Wherein, Hsize and Vsize respectively represents the number of pixels in screen body horizontal direction and in vertical direction, and 6 and 3 respectively represent
The number for the sub-pixel for including in sampling grayscale number and each pixel.
In an embodiment of the present invention, Demura equipment, which can convert the reality output brightness value of acquisition to, itself facilitates meter
The luminance factor of calculation, such as preset target brightness value is 350nit, and the reality that Demura equipment collects some sub-pixel is defeated
Brightness value is 330nit out, then Demura equipment can be translated into coefficient 0.94 (330nit/350nit ≈ 0.94), this also says
The reality output brightness value that the sub-pixel is illustrated is not up to preset luminance standard.
It is right under various levels of brightness mode to obtain the brightness data acquisition screen body that module 20 is used to acquire according to acquisition module 10
Answer the respective luminance compensation data of multiple and different grayscale.
In an embodiment of the present invention, luminance compensation data are to shield the set of the penalty coefficient of internal all pixels point, should
Pixel equally may include multiple sub-pixel points.The luminance compensation data can be obtained by the way that backoff algorithm and Demura equipment are common
Out, wherein backoff algorithm mainly utilizes gamma curve principle, and the data that Demura equipment is obtained further according to backoff algorithm are each
Sub-pixel point automatic Fitting goes out corresponding penalty coefficient.
In an embodiment of the present invention, as shown in figure 3, obtaining module 20 specifically may include detection unit 21, determination unit
22 and fitting unit 23.Detection unit 21 is used to detect the grayscale value that actually enters of each pixel, and determination unit 22 is for true
Surely shield the practical gamma curve value of body, and mesh corresponding with the target brightness value of luminance patterns is determined according to practical gamma curve value
Mark input grayscale value.
It will be understood to those skilled in the art that each sub-pixel point of each screen body corresponding one actually enters grayscale
Value (i.e. the objective physical quantity of things of computer identification) and a reality output brightness value (i.e. human eye brightness is experienced), it
Between have nonlinear mapping relations, can be characterized by gamma curve, usually acquiescently with formula export brightness
=grayscale Gamma is inputted to indicate.
In the acquisition process of offset data in the prior art, usually to shield body for the Gamma of standard 2.2
It is calculated, but in actual production, the gamma curve value of each display screen is difficult to accomplish accurately to manage, so with
The offset data that the mode of this default Gamma value obtains will affect final effect.In the present embodiment, determination unit 22 is logical
What the reality output brightness value and the detection of detection unit 21 for crossing each sub-pixel point of the acquisition of acquisition module 10 obtained actually enters
Relationship between grayscale value, the practical gamma curve value of the available screen body, after being carried out further according to the practical gamma curve value
Continuous calculating, something which increases the accuracy of luminance compensation data.
Assuming that screen body includes N number of sub-pixel point, then according to the reality output brightness value of each sub-pixel point and actually entering
Relationship between grayscale value can calculate N number of gamma curve value.It in an embodiment of the present invention, can be with this N number of gamma curve value
Practical gamma curve value of the average value as the screen body.It in other embodiments, can also counting with this N number of gamma curve value
Practical gamma curve value of the square value as screen body；Or resulting gamma curve value is calculated to shield the sub-pixel of body central point
Practical gamma curve value as screen body.For the specific value mode of gamma curve value, those skilled in the art can root
Make different set according to actual demand, the present invention is not especially limited this.
Because preset target brightness value is known under various luminance patterns, the mesh of body is shielded such as under normal brightness mode
Marking brightness value is then 350nit, so by under determination unit 22 determining practical gamma curve value and certain luminance patterns
The target input ash corresponding with target brightness value of the screen body under this luminance patterns can be obtained in relationship between target brightness value
Rank value.
Fitting unit 23 is used to pass through fitting formula g2=a*g1+ b respectively to each pixel actually enter grayscale value and
Target input grayscale value is fitted to obtain the penalty coefficient of all pixels point, wherein g2Grayscale value, g are inputted for target1For
Pixel actually enters grayscale value, and a and b are penalty coefficient.
The each sub-pixel point detected according to detection unit 21 actually enters grayscale value g1It is determined with determination unit 22
The target for shielding body inputs grayscale value g2, fitting unit 23 is i.e. using fitting formula g2=a*g1+ b is that each sub-pixel point is automatic
Fit corresponding penalty coefficient a and b, wherein a represents the gain of grayscale value, and b then represents deviation.
The set of the penalty coefficient a and b of above-mentioned each sub-pixel point constitute screen body and correspond to certain under certain luminance patterns
The luminance compensation data of a grayscale, the offset data can indicate that wherein m represents the grayscale of screen body using D (m, n), and m represents pre-
If target brightness value.By taking normal brightness mode (target brightness value 350nit) as an example, the total size of luminance compensation data
Also be (Hsize*6*3) × Vsize, be a matrix, wherein Hsize and Vsize respectively represent screen body horizontal direction on and
Number of pixels in vertical direction, 6 and 3 respectively represent for the sub-pixel for including in sampling grayscale number and each pixel
Number.
Fitting module 30 is used to fit screen body in multiple and different ashes according to the luminance compensation data for obtaining the acquisition of module 20
Penalty function corresponding to each grayscale in rank.
In an embodiment of the present invention, penalty function corresponding to each grayscale is with one of above-mentioned various levels of brightness mode
Luminance patterns are benchmark luminance patterns, and combine other luminance patterns (can be described as reference brightness mode) in these luminance patterns
Under luminance compensation data fitting obtain.
Specifically, in one embodiment, penalty function FgIt can be corresponding current grey under each reference brightness mode for screen body
Each compensation subfunction f of rank ggAverage value, in other embodiments, penalty function FgIt can also be each compensation subfunction fgCalculation
Number average value, the present invention are not construed as limiting the physical relationship the two.
Compensate subfunction fgSimilar to a proportion function, in an embodiment of the present invention, subfunction f is compensatedg=100 (D
(g, n)-D (g, l))/(n-l), wherein g is the corresponding current gray of screen body, and n is the target brightness value of reference brightness mode, l
For the target brightness value of benchmark luminance patterns, D (g, n) is the luminance compensation data under reference brightness mode, on the basis of D (g, l)
Luminance compensation data under luminance patterns.For compensating subfunction fgCircular, in the embodiment of the above method
Specific introduction is done, details are not described herein again.
Computing module 40 is used for according to penalty function FgCalculate luminance compensation number of the screen body under any one luminance patterns
According to.
Penalty function F corresponding to above-mentioned a certain grayscale is obtained by fitting module 30gAfterwards, computing module 40 can basis
This penalty function FgObtain the luminance compensation data under any one corresponding luminance patterns of the grayscale.Specifically, any one
Luminance compensation data under luminance patterns can pass through formula D (g, n ')=D (g, l)+Fg* [(n '-l)/100] is calculated,
In, g is the corresponding current gray of screen body, and n ' is the target brightness value of luminance patterns to be compensated, and l is the mesh of benchmark luminance patterns
Brightness value is marked, D (g, n ') is the luminance compensation data under luminance patterns to be compensated, and D (g, l) is bright under benchmark luminance patterns
Spend offset data.For example, be still benchmark luminance patterns for the luminance patterns (normal brightness mode) of 350nit with target brightness value,
Calculate screen body target brightness value be 200nit when correspond to the luminance compensation data of grayscale 128 when, only need to by n '=200nit with
Penalty function F128Bring above-mentioned formula into, it is D (128,350)+F that corresponding luminance compensation data D (128,200), which can be obtained,128*
[(200-350)/100]。
Compensating module 50 is used to calculate resulting luminance compensation data according to computing module 40 and carries out luminance compensation to screen body,
Specifically, compensating module 50 carries out luminance compensation to screen body to be compensated using existing brightness mura compensation method.
In the compensation device provided in an embodiment of the present invention for eliminating screen body brightness disproportionation, screen body is acquired by acquisition module
The respective brightness data of multiple and different grayscale is corresponded under various levels of brightness mode, and it is collected bright according to acquisition module to obtain module
Degree data acquisition screen body correspond to these difference grayscale respective luminance compensation data under these luminance patterns, fitting module root again
Penalty function corresponding to the screen each grayscale of body is fitted according to the luminance compensation data that module obtains are obtained, computing module passes through this
Functional relation can calculate the luminance compensation data that screen body corresponds to any one above-mentioned grayscale under any one luminance patterns.
The embodiment of the present invention fully takes into account this actual conditions of the difference of brightness corresponding to same gray level under different luminance patterns, for not
Different luminance compensation data are provided with same gray level under luminance patterns, improve the accuracy of luminance compensation data, effectively
Solve the problems, such as that luminance compensation data are actual displayed image there are still brightness uniformities poor, Jin Ergai caused by definite value
It has been apt to display effect.In addition, device provided in an embodiment of the present invention will be under same grayscale difference luminance patterns by fitting module
Luminance compensation data between relationship be mapped in penalty function corresponding to the grayscale, as long as so that the later period storage in deposit
Penalty function corresponding to luminance compensation data and the grayscale under the selected Benchmark brightness mode of storage, compared to storage
All offset datas that this grayscale is corresponded under multiple luminance patterns not only substantially reduce memory space, but also its applicability
Also stronger, it can preferably be suitable for the compensation of a variety of common luminance patterns.
One embodiment of the invention additionally provides a kind of computer equipment, including memory, processor and is stored in storage
The computer program being executed by processor on device, processor are realized as described in preceding any embodiment when executing computer program
The step of compensation method.
One embodiment of the invention additionally provides a kind of computer readable storage medium, is stored thereon with computer program, meter
The step of compensation method as described in preceding any embodiment is realized when calculation machine program is executed by processor.Computer storage is situated between
Matter can be any tangible media, such as floppy disk, CD-ROM, DVD, hard disk drive or network medium etc..
Although being produced it should be appreciated that can be computer program the foregoing describe a kind of way of realization of embodiment of the present invention
Product, but the method or apparatus of embodiments of the present invention can be come in fact according to the combination of software, hardware or software and hardware
It is existing.Hardware components can use special logic to realize；Software section can store in memory, by instruction execution appropriate
System, such as microprocessor or special designs hardware execute.It will be understood by those skilled in the art that above-mentioned side
Method and device can be used computer executable instructions and/or be included in the processor control code to realize, such as such as
Disk, the mounting medium of CD or DVD-ROM, the programmable memory of such as read-only memory (firmware) or such as optics or
Such code is provided in the data medium of electrical signal carrier.Methods and apparatus of the present invention can be by such as ultra-large
The semiconductor or such as field programmable gate array of integrated circuit or gate array, logic chip, transistor etc. can be compiled
The hardware circuit realization of the programmable hardware device of journey logical device etc., can also be soft with being executed by various types of processors
Part is realized, can also be realized by the combination such as firmware of above-mentioned hardware circuit and software.
It will be appreciated that though it is referred to several module/units of device in the detailed description above, but this division
It is only exemplary rather than enforceable.In fact, according to an illustrative embodiment of the invention, above-described two or more
Multimode/unit feature and function can be realized in a module/unit, conversely, an above-described module/unit
Feature and function can with further division be realized by multiple module/units.In addition, above-described certain module/mono-
Member can be omitted under certain application scenarios.
It should be appreciated that in order not to obscure embodiments of the present invention, specification only to it is some it is crucial, may not necessary technology
It is described with feature, and the feature that may do not can be realized to some those skilled in the art is explained.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, made any modification, equivalent replacement etc. be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of compensation method for eliminating screen body brightness disproportionation, which is characterized in that including：
It acquires the screen body and corresponds to the respective brightness data of multiple and different grayscale under various levels of brightness mode；
The screen body, which is obtained, according to the brightness data collected corresponds to multiple and different grayscale respectively under various levels of brightness mode
Luminance compensation data；
It is right that the screen body each grayscale institute in the multiple different grayscale is fitted according to the luminance compensation data of acquisition
The penalty function answered；
Luminance compensation data of the screen body under any one luminance patterns are calculated according to the penalty function；And
Luminance compensation is carried out to the screen body according to resulting luminance compensation data are calculated.
2. the compensation method according to claim 1 for eliminating screen body brightness disproportionation, which is characterized in that
The screen body under each grayscale corresponding penalty function by various levels of brightness mode under each grayscale
A kind of luminance patterns be benchmark luminance patterns, and combine reference brightness mode under luminance compensation data fitting obtain, wherein
The reference brightness mode is other luminance patterns in the various levels of brightness mode in addition to Benchmark brightness mode；
Luminance compensation data under any one described luminance patterns pass through formula D (g, n ')=D (g, l)+Fg*[(n′-l)/
100] it is calculated, wherein the g is the corresponding current gray of the screen body, and the n ' is the mesh of luminance patterns to be compensated
Brightness value is marked, the l is the target brightness value of the Benchmark brightness mode, and the D (g, n ') is under luminance patterns to be compensated
Luminance compensation data, the D (g, l) be benchmark luminance patterns under luminance compensation data, the FgIt is corresponding for the screen body
The penalty function of current gray g.
3. the compensation method according to claim 2 for eliminating screen body brightness disproportionation, which is characterized in that the penalty function Fg
Each compensation subfunction f of current gray g is corresponded under each reference brightness mode for the screen bodygAverage value；
The fg=100 (D (g, n)-D (g, l))/(n-l), wherein the n is the target brightness value of the reference brightness mode,
The D (g, n) is the luminance compensation data under the reference brightness mode.
4. the compensation method according to claim 1 for eliminating screen body brightness disproportionation, which is characterized in that the brightness data is
The set of the reality output brightness value of the internal all pixels point of screen, the luminance compensation data are the screen all pictures in vivo
The set of the penalty coefficient of vegetarian refreshments；
It is described that multiple and different grayscale are corresponded under various levels of brightness mode according to the brightness data acquisition collected screen body
Respective luminance compensation data include：
That detects each pixel actually enters grayscale value；
Determine the practical gamma curve value of the screen body, and according to the practical gamma curve value determination and the luminance patterns
The corresponding target of target brightness value inputs grayscale value；
Pass through fitting formula g2=a*g1+ b actually enters grayscale value and target input ash to each pixel respectively
Rank value is fitted to obtain the penalty coefficient of all pixels point, wherein the g2Grayscale value, the g are inputted for target1For institute
The grayscale value that actually enters of pixel is stated, a and the b are penalty coefficient.
5. a kind of compensation device for eliminating screen body brightness disproportionation, which is characterized in that including：
Acquisition module corresponds to the respective brightness data of multiple and different grayscale for acquiring the screen body under various levels of brightness mode；
Module is obtained, the brightness data for acquiring according to the acquisition module obtains the screen body in various levels of brightness mode
The lower respective luminance compensation data of the multiple and different grayscale of correspondence；
Fitting module, the luminance compensation data for being obtained according to the acquisition module fit the screen body described more
Penalty function corresponding to each grayscale in a difference grayscale；
Computing module, for calculating luminance compensation number of the screen body under any one luminance patterns according to the penalty function
According to；And
Compensating module carries out brightness benefit to the screen body for calculating resulting luminance compensation data according to the computing module
It repays.
6. the compensation device according to claim 5 for eliminating screen body brightness disproportionation, which is characterized in that
The screen body under each grayscale corresponding penalty function by various levels of brightness mode under each grayscale
A kind of luminance patterns be benchmark luminance patterns, and combine reference brightness mode under luminance compensation data fitting obtain, wherein
The reference brightness mode is other luminance patterns in the various levels of brightness mode in addition to Benchmark brightness mode；
Luminance compensation data under any one described luminance patterns pass through formula D (g, n ')=D (g, l)+Fg*[(n′-l)/
100] it is calculated, wherein the g is the corresponding current gray of the screen body, and the n ' is the mesh of luminance patterns to be compensated
Brightness value is marked, the l is the target brightness value of the Benchmark brightness mode, and the D (g, n ') is under luminance patterns to be compensated
Luminance compensation data, the D (g, l) be benchmark luminance patterns under luminance compensation data, the FgIt is corresponding for the screen body
The penalty function of current gray g.
7. the compensation device according to claim 6 for eliminating screen body brightness disproportionation, which is characterized in that
The penalty function FgEach compensation subfunction of current gray g is corresponded under each reference brightness mode for the screen body
fgAverage value；
The fg=100 (D (g, n)-D (g, l))/(n-l), wherein the n is the target brightness value of the reference brightness mode,
The D (g, n) is the luminance compensation data under the reference brightness mode.
8. the compensation device according to claim 5 for eliminating screen body brightness disproportionation, which is characterized in that the brightness data is
The set of the reality output brightness value of the internal all pixels point of screen, the luminance compensation data are the screen all pictures in vivo
The set of the penalty coefficient of vegetarian refreshments；
The acquisition module includes：
Detection unit actually enters grayscale value for detect each pixel；
Determination unit, for determining the practical gamma curve value of the screen body, and according to the practical gamma curve value determine with
The corresponding target of the target brightness value of the luminance patterns inputs grayscale value；
Fitting unit, for passing through fitting formula g2=a*g1+ b respectively to each pixel actually enter grayscale value and
The target input grayscale value is fitted to obtain the penalty coefficient of all pixels point, wherein the g2Ash is inputted for target
Rank value, the g1For the grayscale value that actually enters of the pixel, a and the b are penalty coefficient.
9. a kind of computer equipment, including memory, processor and being stored on the memory is executed by the processor
Computer program, which is characterized in that the processor is realized when executing the computer program as appointed in Claims 1-4
The step of one the method.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
It realizes when being executed by processor such as the step of any one of claims 1 to 4 the method.
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