CN108510965B - Display brightness compensation method, device and system - Google Patents
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Abstract
The invention provides a display brightness compensation method, a device and a system, which comprises the steps of firstly obtaining the brightness information of at least two pictures to be tested, and classifying each pixel in the pictures to be tested according to the brightness value; fitting a gray scale brightness curve of each pixel in each classification according to the gray scale value of the picture to be tested and the brightness value of each pixel; storing the corresponding relation between the preset coefficient in the gray scale brightness curve and the position of each pixel in the picture to be tested; determining the current brightness corresponding to the gray scale value of the to-be-tested picture where the pixel with the brightness to be compensated is located according to the target gray scale brightness curve; and determining a corrected gray-scale value according to the current brightness, the position of the pixel with the brightness to be compensated and the gray-scale brightness curve. In the scheme, the byte length of the preset coefficient is smaller than the byte length of the corrected gray scale value, if the coefficient is 6 bits, and the corrected gray scale value is 8 bits, the storage space stored in the flash can be reduced by adopting the display brightness compensation method, and the size of the driving chip is further reduced.
Description
Technical field
The present invention relates to field of display technology, more specifically to a kind of display brightness compensation method, device and are
System.
Background technique
Currently, in order to solve the problems, such as that picture display is uneven, as shown in Figure 1, obtaining entire display panel by CCD camera
Brightness data, processing then is compensated to above-mentioned brightness data using De-mura algorithm, by after correction data be written control
In memory (flash) in coremaking piece (FPC).When display panel powers on, driving chip (driver IC) will be in flash
Correction data is read out, and is called in its internal RAM.When display panel receives display control signal, driving chip will
After data in the display control signal and RAM carry out operation, it is sent to display panel, so that display panel normally shows picture
Face.
However, it is found by the inventors that above-mentioned frame compensation method is by the bright of whole pixels on entire display panel
Degree is corrected, and the correction data of whole pixels of entire panel is written in flash.Number is corrected in driving chip
When according to reading, the RAM for needing capacity sufficiently large is just able to achieve reading data, however, the capacity of RAM is directly proportional to volume, it is larger
The volume that the RAM of capacity will lead to driving chip is larger, and then causes the width of getting out of a predicament or an embarrassing situation of display panel bigger than normal, with current display
The development trend of panel narrow frame is runed counter to.
Therefore, how a kind of display brightness compensation method is provided, both can solve the uneven problem of display screen picture display,
The size that driving chip can be reduced again is those skilled in the art's big technical problem urgently to be resolved.
Summary of the invention
In view of this, both can solve display screen the present invention provides a kind of display brightness compensation method, apparatus and system
The uneven problem of picture display, and the size of driving chip can be reduced.
To achieve the above object, the invention provides the following technical scheme:
A kind of display brightness compensation method, comprising:
The luminance information of at least two pictures to be tested is obtained, the luminance information includes at least in the picture to be tested
The grayscale value of the brightness value of each pixel and the picture to be tested；
According to the average value and the grayscale value of the brightness value of each pixel in each picture to be tested, determine
The target gray scale brightness curve of the picture to be tested；
Each pixel in the picture to be tested is classified according to brightness value；
According to the brightness value of the grayscale value of the picture to be tested and each pixel, each picture in each classification is fitted
The gray-scale intensity curve of element；
Store predetermined coefficient and each pixel present position in the picture to be tested in the gray-scale intensity curve
Corresponding relationship；
Obtain the property parameters of the pixel of brightness to be compensated, the property parameters include the position of the pixel and described
The grayscale value of picture to be tested locating for the pixel of brightness to be compensated；
According to the target gray scale brightness curve, picture to be tested locating for the pixel of the brightness to be compensated is determined
The corresponding present intensity of grayscale value；
According to the present intensity, the position of the pixel of the brightness to be compensated and the gray-scale intensity curve, determine
Grayscale value is corrected out.
Optionally, the luminance information for obtaining at least two pictures to be tested, comprising:
The picture of different grayscale values is shot by CCD camera；
The brightness value and the grayscale value for determining each pixel in the picture of each grayscale value are the picture to be tested
The luminance information in face.
Optionally, each pixel by the picture to be tested is classified according to brightness value, comprising:
Determine the average brightness value of each pixel in each picture to be tested；
Calculate the difference of the brightness value Yu the average brightness value of each pixel in each picture to be tested；
Determine that the pixel of the difference within a preset range is same class pixel.
Optionally, described according to the grayscale value of the picture to be tested and the brightness value of each pixel, it fits each
The gray-scale intensity curve of each pixel in classification, comprising:
The grayscale value of the brightness value of each pixel in each classification and the picture to be tested is fitted to grayscale
Brightness curve G=AiLΛBi, wherein L is brightness value, G is grayscale value, AiAnd BiFor the corresponding predetermined coefficient of classification i；
Correspondingly, predetermined coefficient and each pixel are in the picture to be tested in the storage gray-scale intensity curve
The corresponding relationship of middle present position, comprising:
By coefficient AiAnd BiIt is stored in default storage unit present position in the picture to be tested according to pixel,
Wherein, the coefficient AiAnd BiRespectively 3 bytes.
Optionally, described according to the target gray scale brightness curve, locating for the pixel for determining the brightness to be compensated
The corresponding present intensity of the grayscale value of picture to be tested, comprising:
The grayscale value of presently described picture to be tested is substituted into the target gray scale brightness curve, is determined described to be tested
The corresponding present intensity of the grayscale value of picture.
Optionally, described bright according to the present intensity, the position of the pixel of the brightness to be compensated and the grayscale
It writes music line, determines correction grayscale value, comprising:
The present intensity is substituted into pre-stored gray-scale intensity curve corresponding with the position of the pixel, is calculated
Grayscale value is corrected, so that display panel carries out luminance compensation to the interview panel according to the correction grayscale value.
A kind of dispay brightness compensator, comprising:
First obtains module, and for obtaining the luminance information of at least two pictures to be tested, the luminance information is at least wrapped
Include the grayscale value of the brightness value of each pixel and the picture to be tested in the picture to be tested；
First determining module, for according to the average value of the brightness value of each pixel in each picture to be tested and
The grayscale value determines the target gray scale brightness curve of the picture to be tested；
Division module, for each pixel in the picture to be tested to be classified according to brightness value；
Fitting module, it is every for fitting according to the grayscale value of the picture to be tested and the brightness value of each pixel
The gray-scale intensity curve of each pixel in a classification；
Memory module, for storing in the gray-scale intensity curve predetermined coefficient and each pixel in the picture to be tested
The corresponding relationship of present position in face；
Second obtains module, the property parameters of the pixel for obtaining brightness to be compensated, and the property parameters include described
The grayscale value of picture to be tested locating for the pixel of the position of pixel and the brightness to be compensated；
Second determining module, for determining the pixel of the brightness to be compensated according to the target gray scale brightness curve
The corresponding present intensity of grayscale value of locating picture to be tested, according to the present intensity, the pixel of the brightness to be compensated
Position and the gray-scale intensity curve, determine correction grayscale value.
Optionally, the first acquisition module includes:
Acquisition unit, for shooting the picture of different grayscale values by CCD camera；
First determination unit, the brightness value of each pixel and the grayscale in the picture for determining each grayscale value
Value is the luminance information of the picture to be tested.
Optionally, the division module includes:
Second determination unit, for determining the average brightness value of each pixel in each picture to be tested；
First computing unit, for calculate in each picture to be tested the brightness value of each pixel with it is described average bright
The difference of angle value；
Third determination unit, for determining that the pixel of the difference within a preset range is same class pixel.
Optionally, the fitting module includes:
Fitting unit, for by the grayscale of the brightness value of each pixel in each classification and the picture to be tested
Value is fitted to gray-scale intensity curve G=AiLΛBi, wherein L is brightness value, G is grayscale value, AiAnd BiIt is corresponding default for classification i
Coefficient；
Correspondingly, the memory module includes:
Storage unit is used for coefficient AiAnd BiAccording to pixel in the picture to be tested present position be stored in it is pre-
If in storage unit, wherein the coefficient AiAnd BiRespectively 3 bytes.
Optionally, second determining module includes:
4th determination unit, it is bent for the grayscale value of presently described picture to be tested to be substituted into the target gray scale brightness
Line determines the corresponding present intensity of grayscale value of the picture to be tested.
Optionally, second determining module further include:
Second computing unit, for the present intensity to be substituted into pre-stored ash corresponding with the position of the pixel
Rank brightness curve calculates correction grayscale value, so that display panel carries out the interview panel according to the correction grayscale value
Luminance compensation.
A kind of display brightness compensation system, including the above-mentioned dispay brightness compensator of any one.
Compared with prior art, the technical scheme provided by the invention has the following advantages:
The present invention provides a kind of display brightness compensation methodes, first the brightness letter of at least two pictures to be tested of acquisition
Breath, wherein the luminance information includes at least the brightness value and the picture to be tested of each pixel in the picture to be tested
Grayscale value.Then according to the average value and the grayscale value of the brightness value of each pixel in each picture to be tested, really
Make the target gray scale brightness curve of the picture to be tested.Each pixel in the picture to be tested is carried out according to brightness value
Classification；And according to the brightness value of the grayscale value of the picture to be tested and each pixel, each picture in each classification is fitted
The gray-scale intensity curve of element；Predetermined coefficient and each pixel are stored in the gray-scale intensity curve in the picture to be tested
The corresponding relationship of present position；The property parameters of the pixel of brightness to be compensated are obtained, the property parameters include the pixel
The grayscale value of picture to be tested locating for the pixel of position and the brightness to be compensated；It is bent according to the target gray scale brightness
Line determines the corresponding present intensity of grayscale value of picture to be tested locating for the pixel of the brightness to be compensated；According to described
Present intensity, the brightness to be compensated pixel position and the gray-scale intensity curve, determine correction grayscale value.It can
See, display brightness compensation method provided in this embodiment be by gray-scale intensity curve predetermined coefficient and each pixel where to
The corresponding relationship of present position is stored in test pictures, and the byte length of the predetermined coefficient is less than the correction of each pixel
The byte length of grayscale value, e.g., the correction grayscale value of coefficient 6bit, pixel are usually 8bit, then using this display
Luminance compensation method can reduce the memory space of deposit flash, thereby reduce the size of driving chip.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the display brightness compensation method application system used in the prior art；
Fig. 2 is a kind of flow diagram of display brightness compensation method provided in this embodiment；
Fig. 3 is a kind of another flow diagram of display brightness compensation method provided in this embodiment；
Fig. 4 is a kind of structural schematic diagram of dispay brightness compensator provided in this embodiment.
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 described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In conjunction with background technique it is found that obtaining the brightness data of entire display panel by CCD camera, De- is then utilized
Mura algorithm compensates processing to above-mentioned brightness data, by the memory in data write-in control chip (FPC) after correction
(flash) in.Now by taking the brightness data of certain pixel of 128 grayscale as an example, it is assumed that its resolution ratio be 4*4 (usual electronic equipment
Resolution ratio is much higher than 4*4, if the resolution ratio of mobile phone is 240*320), brightness data is as shown in table 1 below:
Table 1
| 18.12447 | 17.98889 | 17.89858 | 17.36777 |
| 17.97054 | 18.06056 | 17.69356 | 18.13583 |
| 17.69901 | 17.63558 | 17.83013 | 17.59162 |
| 17.24366 | 17.64014 | 17.90051 | 17.90704 |
So, in the prior art, it needs above-mentioned 16 brightness datas compensating calculating by De-mura algorithm, it will
In memory, from the figure not difficult to find, current brightness data carries out table using 8 effective digitals to compensated data record
Show, usually when data are stored, using the storage mode of 8bit.
The luminance compensation method for using the prior art, needs to store the offset data of 16 8 bytes in memory, such as false
If compensated brightness data is 18.20000, then the offset data of memory storage is followed successively by 0.07553 (18.20000-
18.12447)、0.29946(18.20000-17.97054)、0.50099(18.20000-17.69901)、0.95634
(18.20000-17.24366)、0.21111(18.20000-17.98889)、0.13944(18.20000-18.06056)、
0.56442(18.20000-17.63558)、0.55986(18.20000-17.64014)、0.30142(18.20000-
17.89858)、0.50644(18.20000-17.69356)、0.36987(18.20000-17.83013)、0.29949
(18.20000-17.90051)、0.83223(18.20000-17.36777)、0.06417(18.20000-18.13583)、
0.60838(18.20000-17.59162)、0.29296(18.20000-17.90704)。
And the resolution ratio of usually electronic equipment will be much higher than 4*4, it is therefore desirable to store more 8 byte offset datas, such as
Resolution ratio is the screen of 1920*1080, needs to store the offset data of 2073600 pixels, required memory is larger.
Based on this, a kind of display brightness compensation method is present embodiments provided, display screen picture is able to solve and shows not
While equal problem, and the size (memory size) of driving chip can be reduced, as shown in Fig. 2, comprising steps of
S21, the luminance information for obtaining at least two pictures to be tested；
Specifically, obtaining the luminance information of picture to be tested, the picture of different grayscale values can be shot by CCD camera,
Then the brightness value and the grayscale value for determining each pixel in the picture of each grayscale value are the picture to be tested
Luminance information.
For example, by taking the brightness data of certain pixel of above-mentioned 128 grayscale as an example, resolution ratio 4*4, then, this step obtains
The luminance information for the picture to be tested got is the brightness value for 16 pixels that grayscale value is 128, referring to table 1.
It should be noted that in the present embodiment, the luminance information of available at least two picture to be tested, such as in addition to upper
Outside the brightness value for stating each pixel that grayscale value is 128, the brightness value of the pixel of other grayscale values can also be obtained, is such as obtained
The brightness value for each pixel that grayscale value is 64.
S22, average value and the grayscale value according to the brightness value of each pixel in each picture to be tested, really
Make the target gray scale brightness curve of the picture to be tested；
In general, according to target gray scale and brightness value formula G=aL^b, it is 128 and 64 by the above-mentioned grayscale value got
The brightness value of each pixel be averaging brightness first, as the average brightness of 16 pixels in 128 grayscale pictures is
17.79299 (divided by 16 after the brightness summations of 16 pixels), then by the flat of the average brightness of 128 grayscale and 64 grayscale
Equal brightness substitutes into above-mentioned formula G=aL^b, fit the target gray scale brightness curve of picture to be tested coefficient a be equal to 35 with
And b is equal to 0.4, then can determine that the target gray scale brightness curve of the picture to be tested is G=35*L^0.4。
S23, each pixel in the picture to be tested is classified according to brightness value；
Specifically, a kind of implementation that each pixel is classified according to brightness value is present embodiments provided, such as Fig. 3 institute
Show:
S31, the average brightness value for determining each pixel in each picture to be tested；
S32, the difference for calculating the brightness value and the average brightness value of each pixel in each picture to be tested；
S33, determine that the pixel of the difference within a preset range is same class pixel.
Schematically, by taking grayscale in table 1 is 128 pixel as an example, the average brightness for acquiring 16 pixels first is
17.79299, the brightness value of each pixel and the difference of average brightness value are then calculated, as shown in table 2:
Table 2
| 0.331477 | 0.1959 | 0.10559 | -0.42522 |
| 0.17755 | 0.26757 | -0.09943 | 0.34284 |
| -0.09398 | -0.15741 | 0.03714 | -0.20137 |
| -0.54933 | -0.15285 | 0.10752 | 0.11405 |
In the present embodiment, it determines that the pixel of the difference within a preset range is same class pixel, can be specially true
Determine the numerical value that the quotient of difference and above-mentioned average brightness in table 2 obtains to classify, as shown in table 3,16 pixels it is bright
The quotient of the difference and average brightness value of degree and average brightness is successively are as follows:
Table 3
| 0.02 | 0.01 | 0.01 | -0.02 |
| 0.01 | 0.02 | -0.01 | 0.02 |
| -0.01 | -0.01 | 0 | -0.01 |
| -0.03 | -0.01 | 0.01 | 0.01 |
It is possible to each pixel is divided by six classes according to table 3, such as:
A class are as follows: point (1,1), (2,2), (2,4)；
B class are as follows: point (1,2), (1,3), (2,1), (4,3), (4,4)；
C class are as follows: point (3,3)；
D class are as follows: point (2,3), (3,1), (3,2), (3,4), (4,2)；
E class are as follows: point (1,4)；
F class are as follows: point (4,1).
It should be noted that above-mentioned mode classification is only a kind of specific implementation provided in this embodiment, but this programme
It can also be classified using other classifying rules to each pixel, according to actual calculating demand such as by 0.02 and 0.01
It is divided into same class, is same class etc. by -0.01 and -0.02 point.
S24, according to the grayscale value of the picture to be tested and the brightness value of each pixel, fit in each classification
The gray-scale intensity curve of each pixel；
Specifically, the grayscale value of the brightness value of each pixel in each classification and the picture to be tested is fitted
At gray-scale intensity curve G=AiLΛBi, wherein L is brightness value, G is grayscale value, AiAnd BiFor the corresponding predetermined coefficient of classification i.
Schematically, in conjunction with table 1 it is found that the grayscale value of the picture to be tested is 128, then in conjunction with A known to above-mentioned steps
The point of class is (1,1), (2,2), (2,4), wherein the brightness value of pixel (1,1) is the bright of 18.12447, pixel (2,2)
Angle value is 18.06056 and the brightness value of pixel (2,4) is 18.13583, then can according to the grayscale value 128 and this
The brightness value of three pixels determines the gray-scale intensity curve G=34*L of A class pixel^0.4, similarly, obtain the pixel of B class
The gray-scale intensity curve of point is G=34*L^0.4... ..., the gray-scale intensity curve of the pixel of F class is G=37*L^0.4。
Predetermined coefficient and each pixel are locating in the picture to be tested in S25, the storage gray-scale intensity curve
The corresponding relationship of position；
Correspondingly, storing predetermined coefficient and each pixel institute in the picture to be tested in the gray-scale intensity curve
The corresponding relationship for locating position, i.e., by coefficient AiAnd BiAccording to pixel in the picture to be tested present position be stored in it is default
In storage unit, as shown in table 4.Wherein, the coefficient AiAnd BiIt can be respectively 3 byte representation modes.
Table 4
| (34,0.4) | (34,0.4) | (34,0.4) | …… |
| (34,0.4) | (34,0.4) | …… | (34,0.4) |
| …… | …… | …… | …… |
| (37,0.4) | …… | (34,0.4) | (34,0.4) |
It should be noted that when pixel is 4*4, Ai under each pixel classifications being calculated according to above-mentioned formula and
Bi need to only be stored in each pixel location in the picture to be tested, that is, need 16 storage locations.And
For the pixel of current electronic device, for 240*320, need the coefficient of all kinds of pixels being stored in 240*320 pixel
At the position of point, i.e., by 76800 pixels corresponding storage 76800 coefficients Ai and Bi, specifically, can by coefficient Ai with
And Bi is stored then using Ai as Gao Sanwei using Bi as low three using 3 byte representations, then each pixel is corresponding
Store the data of 6 bytes.
Schematically, if the point of A class is (1,1), (2,2), (2,4), then the coefficient of corresponding storage is 034,0.40.
S26, obtain brightness to be compensated pixel property parameters；
After the above-mentioned classification for having carried out each pixel and the storage of all kinds of coefficients, the present embodiment is carrying out pixel
Luminance compensation when, obtain the property parameters of the pixel of brightness to be compensated first, wherein the property parameters include the pixel
Position and the brightness to be compensated pixel locating for picture to be tested grayscale value.
It illustrates, it is assumed that the location of pixels of brightness to be compensated is (1,1), to be measured locating for the pixel of the brightness to be compensated
The grayscale value for trying picture is 64.
S27, according to the target gray scale brightness curve, determine picture to be tested locating for the pixel of the brightness to be compensated
The corresponding present intensity of the grayscale value in face；
Specifically, the grayscale value of presently described picture to be tested is substituted into the target gray scale brightness curve, institute is determined
State the corresponding present intensity of grayscale value of picture to be tested.For example, the grayscale value of above-mentioned picture to be tested is 64, and it is calculated above
Target gray scale brightness curve is G=35*L out^0.4, therefore, it is bent that the grayscale value 64 of picture to be tested is substituted into target gray scale brightness
After line, the brightness for obtaining picture to be tested at this time is 1.82857.
S28, according to the present intensity, the position of the pixel of the brightness to be compensated and the gray-scale intensity curve,
Determine correction grayscale value.
Specifically, the present intensity can be substituted into pre-stored gray-scale intensity corresponding with the position of the pixel
Curve calculates correction grayscale value, so that display panel carries out brightness benefit to the interview panel according to the correction grayscale value
It repays.
For example, the position due to the pixel is (1,1), then in the coefficient A of above-mentioned storageiAnd BiAccording to pixel classifications
It is searched in the corresponding relationship of present position in picture to be tested, that is, can determine that the pixel belongs to A class point, obtain A class
The penalty coefficient A of pointiIt is 34, BiIt is 0.4.
Then the brightness 1.82857 of picture to be tested out calculated above is substituted into such gray-scale intensity curve G=34*L^0.4, the correction grayscale for obtaining A class point at this time is 62.
Similarly, the brightness 1.82857 of above-mentioned picture to be tested can also be substituted into all kinds of gray-scale intensity curves, and then obtained
The brightness 1.82857 of picture to be tested is e.g. substituted into F class gray-scale intensity curve G=37*L by all kinds of correction grayscale^0.4, obtain
The correction grayscale of F class point is 68 at this time.
As it can be seen that display brightness compensation method provided in this embodiment is by predetermined coefficient in gray-scale intensity curve and each
The corresponding relationship of present position is stored in the picture to be tested of pixel place, and the byte length of the predetermined coefficient is less than each picture
The byte length of the correction grayscale value of vegetarian refreshments, e.g., the correction grayscale value of coefficient 6bit, pixel are usually 8bit, then adopting
The memory space that deposit flash can be reduced with the compensation method of this display brightness, thereby reduces the size of driving chip.
On the basis of the above embodiments, the present embodiment additionally provides a kind of dispay brightness compensator, such as Fig. 4 institute
Show, comprising:
First obtains module 41, and for obtaining the luminance information of at least two pictures to be tested, the luminance information is at least
The grayscale value of brightness value and the picture to be tested including each pixel in the picture to be tested；
First determining module 42, for according to the average value of the brightness value of each pixel in each picture to be tested with
And the grayscale value, determine the target gray scale brightness curve of the picture to be tested；
Division module 43, for each pixel in the picture to be tested to be classified according to brightness value；
Fitting module 44, for fitting according to the grayscale value of the picture to be tested and the brightness value of each pixel
The gray-scale intensity curve of each pixel in each classification；
Memory module 45, for storing in the gray-scale intensity curve predetermined coefficient with each pixel described to be tested
The corresponding relationship of present position in picture；
Second obtains module 46, and the property parameters of the pixel for obtaining brightness to be compensated, the property parameters include institute
State the grayscale value of picture to be tested locating for the position of pixel and the pixel of the brightness to be compensated；
Second determining module 47, for determining the picture of the brightness to be compensated according to the target gray scale brightness curve
The corresponding present intensity of grayscale value of picture to be tested locating for element, according to the present intensity, the picture of the brightness to be compensated
The position of element and the gray-scale intensity curve determine correction grayscale value.
Optionally, the first acquisition module includes:
Acquisition unit, for shooting the picture of different grayscale values by CCD camera；
First determination unit, the brightness value of each pixel and the grayscale in the picture for determining each grayscale value
Value is the luminance information of the picture to be tested.
Optionally, the division module includes:
Second determination unit, for determining the average brightness value of each pixel in each picture to be tested；
First computing unit, for calculate in each picture to be tested the brightness value of each pixel with it is described average bright
The difference of angle value；
Third determination unit, for determining that the pixel of the difference within a preset range is same class pixel.
Optionally, the fitting module includes:
Fitting unit, for by the grayscale of the brightness value of each pixel in each classification and the picture to be tested
Value is fitted to gray-scale intensity curve G=AiLΛBi, wherein L is brightness value, G is grayscale value, AiAnd BiIt is corresponding default for classification i
Coefficient；
Correspondingly, the memory module includes:
Storage unit is used for coefficient AiAnd BiAccording to pixel in the picture to be tested present position be stored in it is pre-
If in storage unit, wherein the coefficient AiAnd BiRespectively 3 bytes.
Optionally, second determining module includes:
4th determination unit, it is bent for the grayscale value of presently described picture to be tested to be substituted into the target gray scale brightness
Line determines the corresponding present intensity of grayscale value of the picture to be tested.
Optionally, second determining module further include:
Second computing unit, for the present intensity to be substituted into pre-stored ash corresponding with the position of the pixel
Rank brightness curve calculates correction grayscale value, so that display panel carries out the interview panel according to the correction grayscale value
Luminance compensation.
Except this, on the basis of the above embodiments, the present embodiment additionally provides a kind of display brightness compensation system, including
The above-mentioned dispay brightness compensator of any one.The working principle of the device and system refers to above method embodiment,
Not repeated description herein.
To sum up, the present invention provides a kind of display brightness compensation methodes, obtain at least two pictures to be tested first
Luminance information, wherein the luminance information includes at least in the picture to be tested the brightness value of each pixel and described to be tested
The grayscale value of picture.Then according to the average value of the brightness value of each pixel in each picture to be tested and the grayscale
Value, determines the target gray scale brightness curve of the picture to be tested.By each pixel in the picture to be tested according to brightness
Value is classified；And according to the brightness value of the grayscale value of the picture to be tested and each pixel, fit in each classification
Each pixel gray-scale intensity curve；Predetermined coefficient is stored in the gray-scale intensity curve with each pixel described to be tested
The corresponding relationship of present position in picture；The property parameters of the pixel of brightness to be compensated are obtained, the property parameters include described
The grayscale value of picture to be tested locating for the pixel of the position of pixel and the brightness to be compensated；It is bright according to the target gray scale
It writes music line, determines the corresponding present intensity of grayscale value of picture to be tested locating for the pixel of the brightness to be compensated；According to
The present intensity, the brightness to be compensated pixel position and the gray-scale intensity curve, determine correction grayscale value.
As it can be seen that display brightness compensation method provided in this embodiment be by gray-scale intensity curve predetermined coefficient and each pixel where
The corresponding relationship of present position is stored in picture to be tested, and the byte length of the predetermined coefficient is less than rectifying for each pixel
The byte length of positive grayscale value, e.g., the correction grayscale value of coefficient 6bit, pixel are usually 8bit, then using this display
Device luminance compensation method can reduce the memory space of deposit flash, thereby reduce the size of driving chip.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.To the upper of the disclosed embodiments
It states bright, enables those skilled in the art to implement or use the present invention.Various modifications to these embodiments are to ability
Will be apparent for the professional technician in domain, the general principles defined herein can not depart from it is of the invention
In the case where spirit or scope, realize in other embodiments.Therefore, the present invention be not intended to be limited to it is shown in this article these
Embodiment, and it is to fit to the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. a kind of display brightness compensation method characterized by comprising
The luminance information of at least two pictures to be tested is obtained, the luminance information includes at least each picture in the picture to be tested
The brightness value of element and the grayscale value of the picture to be tested；
According to the average value and the grayscale value of the brightness value of each pixel in each picture to be tested, determine described
The target gray scale brightness curve of picture to be tested；
Each pixel in the picture to be tested is classified according to brightness value；
According to the brightness value of the grayscale value of the picture to be tested and each pixel, each pixel in each classification is fitted
Gray-scale intensity curve；
Store pair of predetermined coefficient and each pixel present position in the picture to be tested in the gray-scale intensity curve
It should be related to；
Obtain the property parameters of the pixel of brightness to be compensated, the property parameters include the position of the pixel and described wait mend
Repay the grayscale value of picture to be tested locating for the pixel of brightness；
According to the target gray scale brightness curve, the grayscale of picture to be tested locating for the pixel of the brightness to be compensated is determined
It is worth corresponding present intensity；
According to the present intensity, the position of the pixel of the brightness to be compensated and the gray-scale intensity curve, determine to rectify
Positive grayscale value；
It is described according to the grayscale value of the picture to be tested and the brightness value of each pixel, fit each picture in each classification
The gray-scale intensity curve of element, comprising:
The grayscale value of the brightness value of each pixel in each classification and the picture to be tested is fitted to gray-scale intensity
Curve G=AiLΛBi, wherein L is brightness value, G is grayscale value, AiAnd BiFor the corresponding predetermined coefficient of classification i；
Correspondingly, predetermined coefficient and each pixel institute in the picture to be tested in the storage gray-scale intensity curve
Locate the corresponding relationship of position, comprising:
By coefficient AiAnd BiIt is stored in default storage unit present position in the picture to be tested according to pixel, wherein
The coefficient AiAnd BiRespectively 3 bytes.
2. display brightness compensation method according to claim 1, which is characterized in that the acquisition at least two is to be tested
The luminance information of picture, comprising:
The picture of different grayscale values is shot by CCD camera；
The brightness value and the grayscale value for determining each pixel in the picture of each grayscale value are the picture to be tested
Luminance information.
3. display brightness compensation method according to claim 1, which is characterized in that it is described will be in the picture to be tested
Each pixel classify according to brightness value, comprising:
Determine the average brightness value of each pixel in each picture to be tested；
Calculate the difference of the brightness value Yu the average brightness value of each pixel in each picture to be tested；
Determine that the pixel of the difference within a preset range is same class pixel.
4. display brightness compensation method according to claim 1, which is characterized in that described bright according to the target gray scale
It writes music line, determines the corresponding present intensity of grayscale value of picture to be tested locating for the pixel of the brightness to be compensated, comprising:
The grayscale value of presently described picture to be tested is substituted into the target gray scale brightness curve, determines the picture to be tested
The corresponding present intensity of grayscale value.
5. display brightness compensation method according to claim 1, which is characterized in that it is described according to the present intensity,
The position of the pixel of the brightness to be compensated and the gray-scale intensity curve determine correction grayscale value, comprising:
The present intensity is substituted into pre-stored gray-scale intensity curve corresponding with the position of the pixel, calculates correction
Grayscale value, so that display panel carries out luminance compensation to the display panel according to the correction grayscale value.
6. a kind of dispay brightness compensator characterized by comprising
First obtains module, and for obtaining the luminance information of at least two pictures to be tested, the luminance information includes at least institute
State the grayscale value of the brightness value of each pixel and the picture to be tested in picture to be tested；
First determining module, for according to the average value of the brightness value of each pixel in each picture to be tested and described
Grayscale value determines the target gray scale brightness curve of the picture to be tested；
Division module, for each pixel in the picture to be tested to be classified according to brightness value；
Fitting module, for fitting each point according to the grayscale value of the picture to be tested and the brightness value of each pixel
The gray-scale intensity curve of each pixel in class；
Memory module, for storing in the gray-scale intensity curve predetermined coefficient and each pixel in the picture to be tested
The corresponding relationship of present position；
Second obtains module, and the property parameters of the pixel for obtaining brightness to be compensated, the property parameters include the pixel
Position and the brightness to be compensated pixel locating for picture to be tested grayscale value；
Second determining module is used for according to the target gray scale brightness curve, locating for the pixel for determining the brightness to be compensated
Picture to be tested the corresponding present intensity of grayscale value, according to the present intensity, the position of the pixel of the brightness to be compensated
It sets and the gray-scale intensity curve, determines correction grayscale value；
The fitting module includes:
Fitting unit, for intending the grayscale value of the brightness value of each pixel in each classification and the picture to be tested
Synthesize gray-scale intensity curve G=AiLΛBi, wherein L is brightness value, G is grayscale value, AiAnd BiFor the corresponding default system of classification i
Number；
Correspondingly, the memory module includes:
Storage unit is used for coefficient AiAnd BiAccording to pixel, present position is stored in default deposit in the picture to be tested
In storage unit, wherein the coefficient AiAnd BiRespectively 3 bytes.
7. dispay brightness compensator according to claim 6, which is characterized in that described first, which obtains module, includes:
Acquisition unit, for shooting the picture of different grayscale values by CCD camera；
First determination unit, the brightness value and the grayscale value of each pixel are in the picture for determining each grayscale value
The luminance information of the picture to be tested.
8. dispay brightness compensator according to claim 6, which is characterized in that the division module includes:
Second determination unit, for determining the average brightness value of each pixel in each picture to be tested；
First computing unit, for calculating the brightness value of each pixel and the average brightness value in each picture to be tested
Difference；
Third determination unit, for determining that the pixel of the difference within a preset range is same class pixel.
9. dispay brightness compensator according to claim 8, which is characterized in that second determining module includes:
4th determination unit, for the grayscale value of presently described picture to be tested to be substituted into the target gray scale brightness curve, really
Make the corresponding present intensity of grayscale value of the picture to be tested.
10. dispay brightness compensator according to claim 9, which is characterized in that second determining module is also wrapped
It includes:
Second computing unit, it is bright for the present intensity to be substituted into pre-stored grayscale corresponding with the position of the pixel
It writes music line, calculates correction grayscale value, so that display panel carries out brightness to the display panel according to the correction grayscale value
Compensation.
11. a kind of display brightness compensation system characterized by comprising aobvious as described in any one of claim 6-10
Show device luminance compensating mechanism.
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Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109272945B (en) * | 2018-11-07 | 2021-08-24 | 深圳Tcl新技术有限公司 | Backlight correction method and device for display screen and computer readable storage medium |
| CN111261081B (en) * | 2018-11-30 | 2021-10-19 | 北京小米移动软件有限公司 | Screen display method and device |
| CN109658864B (en) * | 2018-12-27 | 2020-07-24 | 厦门天马微电子有限公司 | Display panel display processing method and display processing device |
| CN109616507B (en) | 2019-01-02 | 2020-07-28 | 合肥京东方显示技术有限公司 | Mura compensation device, display panel, display device and mura compensation method |
| CN109801581B (en) * | 2019-01-31 | 2022-04-19 | 武汉天马微电子有限公司 | Display panel compensation gray scale value determination method and device and display device |
| CN111504608B (en) * | 2019-01-31 | 2022-10-04 | 中强光电股份有限公司 | Brightness uniformity detection system and brightness uniformity detection method |
| CN109637431B (en) * | 2019-02-25 | 2022-04-01 | 武汉天马微电子有限公司 | Display compensation method of display panel |
| CN112304421B (en) * | 2019-07-26 | 2022-03-11 | 深圳Tcl数字技术有限公司 | Processing method of gray scale intensity data, storage medium and terminal equipment |
| CN112700750B (en) * | 2019-10-22 | 2022-06-17 | 上海和辉光电股份有限公司 | Luminance uniformity control method, luminance uniformity control device, and electronic apparatus |
| CN113470571B (en) * | 2020-03-30 | 2022-08-05 | 北京小米移动软件有限公司 | Brightness compensation method and device, electronic equipment and computer readable storage medium |
| CN111487795B (en) * | 2020-05-13 | 2022-10-04 | Tcl华星光电技术有限公司 | Light leakage brightness detection system and detection method |
| CN111554224B (en) * | 2020-05-15 | 2022-09-16 | 昆山国显光电有限公司 | Display panel mura compensation method and device and display device |
| CN112216243B (en) * | 2020-10-30 | 2022-03-18 | 京东方科技集团股份有限公司 | Brightness compensation method, driving method and device for display device |
| CN114765015A (en) * | 2021-01-13 | 2022-07-19 | 敦泰电子股份有限公司 | Display driving circuit system |
| CN113241030B (en) * | 2021-04-27 | 2022-12-16 | 广东小天才科技有限公司 | Display screen brightness compensation method and device and electronic equipment |
| CN113744691A (en) * | 2021-09-10 | 2021-12-03 | 昇显微电子(苏州)有限公司 | Organic Light Emitting Diode (OLED) panel Demura method and device |
| CN113889017B (en) * | 2021-09-30 | 2024-02-20 | Tcl华星光电技术有限公司 | Display brightness adjusting method and device, electronic equipment and storage medium |
| CN114360449B (en) * | 2022-01-14 | 2023-08-08 | 苇创微电子(上海)有限公司 | A multi-pixel fusion compression method for display Mura calibration |
| CN114612437B (en) * | 2022-03-15 | 2024-04-09 | 深圳市科泰兴业科技有限公司 | AMOLED-based display image quality improvement method |
| CN115620671A (en) * | 2022-09-29 | 2023-01-17 | 北京奕斯伟计算技术股份有限公司 | Display compensation method, display driver chip, display device |
| CN115966158A (en) * | 2022-12-29 | 2023-04-14 | 深圳市思坦科技有限公司 | Display screen compensation method, device and system |
| CN117475865A (en) * | 2022-12-30 | 2024-01-30 | Tcl华星光电技术有限公司 | Brightness compensation method, brightness compensation device and display device |
| CN117577035B (en) * | 2023-10-16 | 2024-09-17 | 上海傲显科技有限公司 | Display compensation method |
| CN119339670B (en) * | 2024-12-20 | 2025-05-27 | 昇显微电子(苏州)股份有限公司 | OLED display panel sub-pixel level color balance compensation method and system based on De-Mura compensation technology |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100791387B1 (en) * | 2006-10-25 | 2008-01-07 | 삼성전자주식회사 | Image processing method and device |
| TWI375198B (en) * | 2007-05-17 | 2012-10-21 | Tpo Displays Corp | A system for displaying images |
| TW200917227A (en) * | 2007-10-12 | 2009-04-16 | Delta Electronics Inc | Liquid crystal display device and aparatus and method for controlling luminance of liquid crystal panel thereof |
| CN103106876B (en) * | 2013-01-14 | 2014-12-10 | 合肥工业大学 | Global dimming method of liquid crystal display backlight based on image classification |
| CN104021773B (en) * | 2014-05-30 | 2015-09-09 | 京东方科技集团股份有限公司 | A kind of luminance compensation method of display device, luminance compensating mechanism and display device |
| CN104021759A (en) * | 2014-05-30 | 2014-09-03 | 京东方科技集团股份有限公司 | Luminance supplementing method and device for display device, and display device |
| CN105529002B (en) * | 2014-09-30 | 2019-05-21 | 青岛海信电器股份有限公司 | A kind of method and device of determining luminance compensation coefficient |
| CN104269157B (en) * | 2014-10-11 | 2018-05-22 | 成都晶砂科技有限公司 | A kind of OLED screen gamma correction method |
| CN107657932B (en) * | 2017-11-17 | 2019-10-18 | 深圳市华星光电半导体显示技术有限公司 | The gray scale compensation data detection method of liquid crystal display panel |
| CN107799084B (en) * | 2017-11-21 | 2019-11-22 | 武汉华星光电半导体显示技术有限公司 | Device and method, the memory of luminance compensation |
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