CN104599632B - Improve the method and device of OLED display brightness uniformities - Google Patents
Improve the method and device of OLED display brightness uniformities Download PDFInfo
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Abstract
The invention discloses a kind of method and device of raising OLED display brightness uniformities, including：Capture the luminance matrix of initial pictures brightness；The luminance level and initial pictures luminance matrix of image as requested, select optimal reference brightness, reduction brightness processed is carried out to the pixel cell of the luminance matrix higher than optimal reference brightness, and/or raising brightness processed is carried out to the pixel cell of the luminance matrix less than optimal reference brightness, to generate image rectification matrix；Input refers to gray scale image；Respective pixel unit with reference to gray scale image and image rectification matrix is subjected to the image after the image after point multiplication operation is corrected, output calibration to OLED display screen.It is an advantage of the invention that：First, it can quickly obtain the image rectification matrix of better astringency；Second, brightness uniformity can reach more than 90%；3rd, optimal reference brightness considers actual measured value, OLED and requires luminance level, pixel intensity decay and luminescent lifetime.
Description
Technical field
The invention belongs to organic light emitting display technical field, especially, it is related to a kind of raising OLED display brightness uniformities
Method and device.
Background technology
OLED (Organic Light Emitting Diode) is Organic Light Emitting Diode, and principle of luminosity is：It is saturating with ITO
Prescribed electrode and metal electrode are respectively as the anode and negative electrode of device, and under certain voltage driving, electronics and hole are respectively from the moon
Pole and anode are injected into electronics and hole transmission layer, and electronics and hole move to luminous respectively through electronics and hole transmission layer
Layer, and met in luminescent layer, form exciton and excite light emitting molecule.At present, due to the limitation of OLED technological levels, cause
Each pixel driver TFT threshold voltage is inconsistent, is generally improved using voltage driving compensation circuit, largely carried
High brightness uniformity, but due to carrier mobility mutation, the factor such as power line IR-drop, OLED threshold drift inputs phase
Same data-signal, the current value for producing TFT is also different, so as to cause oled panel brightness irregularities.
The existing method for improving oled panel brightness uniformity mainly includes：First, compensation circuit is driven using electric current, from
The signal for driving IC outputs is directly electric current, and replicated and be stored in pixel, and driving OLED lights.But due to this method
There are problems that some can not be solved, all simply deliver in the literature always, have no actual product application；Second, using outside benefit
Repay, during panel is produced, measure each picture element in panel actually lights brightness, and burning in panel module in
In depositing, when external system inputs a display picture, driving IC can read the variation value of each picture element in internal memory, then drive
Make picture voltage correction in dynamic IC, then export to indivedual corresponding picture elements, this method operation is more complicated.
In addition, publication No. also discloses that one kind is uniform for improving display brightness for CN102332242A patent document
Property system and method, this method is used to be processed to the three primary colors of display image all pixels point, passes through the color of the colors of R/G/B tri-
The correction of making up the difference of rank value.Its significant drawback is：Although brightness uniformity can be made to obtain a certain degree of raising, in balance
Effect is not very obvious in terms of actual measured value, OLED requirements luminance level, pixel intensity decay and luminescent lifetime.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of method of raising OLED display brightness uniformities, its
By requiring that actual measured value, OLED are balanced between image and initial pictures brightness requires luminance level, pixel intensity
Decay and luminescent lifetime, to improve display brightness uniformity.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：It is uniform that one kind improves OLED display brightness
The device of property, it includes OLED display screen, and the device of the raising OLED display brightness uniformities also includes：Brightness of image is gathered
Module, it is connected with the OLED display screen, and described image brightness acquisition module is used to capture an initial pictures brightness, described first
Beginning brightness of image is the brightness of the OLED display screen output image；Correction matrix module, it gathers mould with described image brightness
Block is connected, and the correction matrix module includes a reference brightness, and the correction matrix module is to first higher than the reference brightness
Beginning brightness of image carries out reduction brightness processed, and/or carries out raising brightness to the initial pictures brightness less than the reference brightness
Processing, the correction matrix module is used to generate an image rectification matrix；And brightness uniformity processing module, itself and the correction
Matrix module is connected and is connected with a gray scale image module, and the gray scale image module is used for offer one and refers to gray scale image, institute
Stating brightness uniformity processing module is used to the matrix of the reference gray scale image and described image correction matrix carrying out point multiplication operation
A correction chart picture is obtained, the correction chart picture is the input picture of OLED display screen.
Further, dot product fortune is carried out by the matrix to the reference brightness and the reciprocal of the matrix of initial pictures brightness
Calculation obtains described image correction matrix.
Further, the correction matrix module includes a specification brightness of image, and the correction matrix module passes through contrast
The specification brightness of image generates the reference brightness with initial pictures brightness.
Further, formula L is passed throughm(x, y)=F { Gm(x,y)·Tm(x, y) } obtain the correction chart picture display it is bright
Degree.
Another object of the present invention is to provide a kind of method of raising OLED display brightness uniformities, this method includes：
S100：Brightness of image acquisition module captures the matrix of OLED display screen output image brightness, the OLED display screen output image
Brightness is initial pictures brightness；S200：The correction matrix module is reduced to the initial pictures brightness higher than reference brightness
Brightness processed, and/or raising brightness processed is carried out to the initial pictures brightness less than the reference brightness, in the reference brightness
Interative computation is set up between initial pictures brightness and generates an image rectification matrix；S300：Gray scale image module output one is referred to
Gray scale image is to a brightness uniformity processing module；S400：The brightness uniformity processing module is by the square of the reference gray scale image
Battle array carries out point multiplication operation with described image correction matrix and obtains a correction chart picture, and the correction chart picture is input into OLED shows
Screen.
Further, the step S200 is specifically included：201：The correction matrix module is bright by contrasting specification image
Degree obtains a reference brightness with initial pictures brightness；202：The correction matrix module to the matrix of the reference brightness with it is initial
The reciprocal of the matrix of brightness of image carries out point multiplication operation to obtain described image correction matrix, realizes to higher than the described first reference
The pixel cell of the luminance matrix of brightness carries out reduction brightness processed, and/or to the brightness square less than first reference brightness
The pixel cell of battle array carries out raising brightness processed.
Further, the step 201 specifically includes step：2011：To the initialisation image brightness and the specification
Brightness of image is contrasted, when the minimum value of the initial pictures brightness is more than or equal to the specification brightness of image, with
Minimum brightness in the initial pictures brightness is used as the reference brightness.
Further, the step 201 also includes：2022：One requires that brightness is equal defined in the correction matrix module
Even property；2023：Brightness uniformity, which enters, to be required with described to the ratio of the initial pictures brightness minimum value and specification brightness of image
Row contrast；2024：Described require bright when the ratio of the initial pictures brightness minimum value and specification brightness of image is more than or equal to
When spending uniformity, using the specification brightness of image as reference brightness, to being more than reference brightness in the initial pictures brightness
Image is corrected；2025：Described require bright when the ratio of the initial pictures brightness minimum value and specification brightness of image is less than
When spending uniformity, drive circuit signal is adjusted, then the condition for making it meet the step 2011 and step 2024 carries out school
Just.
Further, the size of described image correction matrix depends on the resolution ratio of OLED display screen.
Further, the reference brightness passes through formula：
To select.
The present invention has following substantive distinguishing features and progress relative to prior art：
First, it is simple to operate quick, by capturing initial pictures luminance matrix, an optimal reference brightness is selected, to initial
Brightness of image matrix carries out homogeneity correction processing generation image rectification matrix, and then, input refers to gray scale image, will be with reference to ash
Rank image carries out point multiplication operation with image rectification matrix and obtains correction chart picture, and direct high-ranking officers' positive image is input to OLED display screen.
Second, it is considered to balance factor, reference brightness considers actual measured value, OLED and requires luminance level, pixel intensity
Decay and luminescent lifetime, while specific interative computation is carried out, in addition to it is relatively low to the luminosity of brightness uniformity
Image carries out gamma correction, and display life and display effect can be balanced to a certain extent.
Brief description of the drawings
Fig. 1 improves the schematic flow sheet of OLED display brightness uniformity methods for the present invention；
Fig. 2 is the iterative algorithm schematic diagram of method shown in Fig. 1；
Fig. 3 improves the structural representation of the device of OLED display brightness uniformities for the present invention；
Fig. 4 is the Application Example schematic diagram of Fig. 3 shown devices；
Fig. 5 for the present invention process twice the luminance uniformity correction of iteration first embodiment analog simulation result signal
Figure；
Fig. 6 is second embodiment analog simulation result signal of the present invention by the luminance uniformity correction of iteration twice
Figure.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be with
More fully understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
First embodiment
Fig. 1 is refer to, the method for raising OLED display brightness uniformities of the invention includes：S100：Brightness of image is gathered
Module captures the matrix of OLED display screen output image brightness, and the OLED display screen output image brightness is that initial pictures are bright
Degree；S200：The correction matrix module carries out reduction brightness processed to the initial pictures brightness higher than reference brightness, and/or right
Initial pictures brightness less than the reference brightness carries out raising brightness processed, the reference brightness and initial pictures brightness it
Between set up interative computation generate an image rectification matrix；S300：Gray scale image module output one is with reference to gray scale image a to brightness
Uniform treatment module；S400：The brightness uniformity processing module corrects the matrix of the reference gray scale image and described image
Matrix carries out point multiplication operation and obtains a correction chart picture, and the correction chart picture is input into OLED display screen.
In the present embodiment, the step 201 specifically includes step：
2011：The initialisation image brightness is contrasted with the specification brightness of image, when the initial pictures are bright
When the minimum value of degree is more than or equal to the specification brightness of image, institute is used as using the minimum brightness in the initial pictures brightness
State reference brightness.
In the present embodiment, the step 201 also includes：
2022：One requires brightness uniformity defined in the correction matrix module；
2023：Brightness uniformity is required with described to the ratio of the initial pictures brightness minimum value and specification brightness of image
Contrasted；
2024：Described require bright when the ratio of the initial pictures brightness minimum value and specification brightness of image is more than or equal to
When spending uniformity, using the specification brightness of image as reference brightness, to being more than reference brightness in the initial pictures brightness
Image is corrected；
2025：Described brightness uniformity is required when the ratio of the initial pictures brightness minimum value and specification brightness of image is less than
Property when, adjust drive circuit signal, then the condition for making it meet the step 2011 and step 2024 be corrected.
In the present embodiment, the size of described image correction matrix depends on the resolution ratio of OLED display screen.
As specific embodiment, specification image definition is requires image, and reference brightness is defined as optimal reference brightness.
Preferably, by requiring to be iterated computing between image and the initial pictures brightness described, to realize
State and reduction brightness processed is carried out to the pixel cell of the luminance matrix higher than the optimal reference brightness, and/or to less than described
The pixel cell of the luminance matrix of optimal reference brightness carries out raising brightness processed, and the number of times of the interative computation is decided by described
Corresponding relation between the gray level of each pixel cell of image rectification matrix and the luminance level for requiring image.
Preferably, the reference gray scale image is the ideal image of same GTG.
Preferably, the iteral computing flow includes judging：The GTG of each pixel cell of described image correction matrix
Whether the minimum value of the corresponding luminance level for requiring image of level and the ratio of maximum, which are more than or equal to, requires that brightness is equal
The ratio of even property.
Preferably, the selection of the optimal reference brightness is based on requiring brightness of image level, the initial picture of OLED display screen
Plain brightness minimum value and brightness uniformity reference value.
Preferably, it is more than or equal in the initial pixel brightness minimum value of the OLED display screen and described requires the bright of image
During degree level, optimal reference brightness is used as using minimum brightness.
Preferably, it is less than the brightness water for requiring image in the initial pixel brightness minimum value of the OLED display screen
Put down, but the ratio of initial pixel brightness minimum value and the luminance level for requiring image is referred to more than or equal to brightness uniformity
During value, optimal reference brightness is used as using the luminance level for requiring image.
Preferably, luminance uniformity correction only is carried out to the pixel intensity more than optimal reference brightness.
Preferably, in the initial pixel brightness minimum value and the luminance level for requiring image of the OLED display screen
When ratio is less than brightness uniformity reference value, drive voltage signal level is adjusted, makes the initial pixel of the OLED display screen bright
The ratio of degree minimum value and the luminance level for requiring image is more than or equal to the luminance level for requiring image, Ran Houjin
Row luminance uniformity correction.
Preferably, by requiring to be iterated computing between image and the initial pictures brightness described, to realize
State and reduction brightness processed is carried out to the pixel cell of the luminance matrix higher than the optimal reference brightness, and/or to less than described
The pixel cell of the luminance matrix of optimal reference brightness carries out raising brightness processed, and the number of times of the interative computation is decided by described
Corresponding relation between the gray level of each pixel cell of image rectification matrix and the luminance level for requiring image.
Fig. 2 is refer to, is requiring to set up interative computation between image and initial pictures brightness, wherein, Lm(x, y)=F { Gm
(x,y)·Tm(x, y) } represent gray level it is calibrated after actual corresponding display brightness, F represent display panel gray level with
The corresponding relation of brightness.
Represent whether the brightness uniformity of display panel meets the requirements, i.e., more than or equal to brightness
Uniformity reference value Ur, min { Lm(x, y) } and max { Lm(x, y) } represent m gray levels the corresponding display unit of display panel
(pixel) brightness minimum value and maximum.
Tm(x, y) is the corresponding m gray scale corrections factor of display unit.
Represent that the intrinsic brilliance of display unit is less than reference brightness to such display unit more than or equal to 1,
Its gray scale correction factor takes 1, represents that the corresponding GTG of display unit of low-light level retains initial value.
Represent that the intrinsic brilliance of display unit is more than reference brightness less than 1, to such display unit, its ash
Rank correction factor takesRepresenting the corresponding GTG of display unit of high brightness can decrease, bright to reduce its display
Degree, it is close to low-light level display unit.
This formula is mainly the reference brightness level of selection correction, when the initial measurement of all display units of display panel
Minimum value min { L (x, y) } in value is more than or equal to specification brightness value Lspec, reference brightness selection minimum value min { L (x, y) }；
When minimum value min { L (x, y) } is less than Lspec, and min { L (x, y) }/LspecMore than or equal to brightness uniformity reference value Ur, ginseng
Brightness value is examined for Lspec；When minimum value min { L (x, y) } is less than Lspec, and min { L (x, y) }/LspecLess than brightness uniformity
Property reference value Ur, now need to improve the drive signal level of whole display panel so that min { L (x, y) }/LspecIt is more than or equal to
Brightness uniformity reference value Ur, it is L then referring to brightness valuespec。
CT (m)=Tm(x, y) represents the corresponding image rectification matrix of m rank gray scales for meeting brightness uniformity to be saved in school
In positive matrices collection CT.
Gm(x, y) is m rank grey levels；Tm(x, y) is the corresponding image rectification matrix of m rank gray scales, and initial value is set to 1；Lm
(x, y) is the corresponding luminosity of m rank gray scales, and F is corresponding relation between grey level and brightness, can by shield body driving and
Intensity detection equipment is realized；Gm/Tm/LmIt is formed objects two-dimensional matrix, the size of matrix depends on the resolution ratio and root of screen body
Screen body is divided according to actual demand and intensity detection equipment；CT (m) is the corresponding correction matrix collection of GTG for requiring correction,
Full gray scale image correction matrix can be obtained by interpolation.
Preferably, each iteration can all generate an image rectification matrix, by the reference gray scale image of input and correction square
OLED display screen is output to as the image after correction after battle array corresponding unit (minimum pixel) multiplication, wherein correction matrix is initial
It is worth for all 1's matrix, i.e., is now output to the image after the correction of OLED display screen to refer to gray scale image, is adopted by brightness of image
The luminance matrix of acquisition means capture and desired specification luminance level, select optimal reference brightness, next iteration computing
Correction matrix is the optimal brightness product reciprocal with luminance matrix corresponding unit, to reach respectively to above and below optimal reference
The unit of brightness carries out reduction brightness and improves the purpose of brightness processed, finally causes OLED display screen brightness uniformity to reach rule
Lattice requirement.
Preferably, the described pair of pixel cell less than the luminance matrix of the optimal reference brightness carries out raising brightness processed
Also include：The step of handling is overflowed to GTG, it is more than maximum gray 255 that the GTG, which overflows,.Shown in the OLED
The initial pixel brightness minimum value of screen is more than or equal to described when requiring the luminance level of image, and optimal ginseng is used as using minimum brightness
Examine brightness.
As specific embodiment, (being more than or equal to) requirement is met in the initial pixel brightness minimum value of OLED display screen
During luminance level, optimal reference brightness L0 is used as using minimum brightness.
Second embodiment
It refer to Fig. 3, the device of raising OLED display brightness uniformities of the invention, it includes OLED display screen 200, also
Including：Brightness of image acquisition module 100, it is connected with the OLED display screen 100, and described image brightness acquisition module 100 is used
In capturing an initial pictures brightness, the initial pictures brightness is the brightness of the OLED display screen output image；Correction matrix
Module 300, it is connected with described image brightness acquisition module 100, and the correction matrix module 300 includes a reference brightness, institute
State the initial pictures brightness of 300 pairs of correction matrix module higher than the reference brightness and carry out reduction brightness processed, and/or to less than
The initial pictures brightness of the reference brightness carries out raising brightness processed, and the correction matrix module 300 is used to generate an image
Correction matrix；And brightness uniformity processing module 400, its be connected with the correction matrix module 300 and with a gray scale image mould
Block is connected, and the gray scale image module is used for offer one and refers to gray scale image, and the brightness uniformity processing module 400 is used for institute
The matrix stated with reference to gray scale image carries out point multiplication operation with described image correction matrix and obtains a correction chart picture, the correction chart picture
For the input picture of OLED display screen.
In the present embodiment, point is carried out by the matrix to the reference brightness and the reciprocal of the matrix of initial pictures brightness
Multiplication obtains described image correction matrix, and the correction matrix module 300 includes a specification brightness of image, the correction matrix
Module 300 is by contrasting the specification brightness of image and the initial pictures brightness generation reference brightness.
Preferably, it is described to GTG overflow handle the step of also include：In the initial pixel of the OLED display screen
The ratio of brightness minimum value and the luminance level for requiring image be more than or equal to it is described when requiring the luminance level of image, with
The luminance level for requiring image, or brightness minimum value and the luminance level for requiring image ratio as optimal reference
Brightness.
Preferably, luminance uniformity correction only is carried out to the pixel intensity more than optimal reference brightness.
As specific embodiment, OLED display screen initial pixel brightness minimum value and require the ratio of luminance level
Brightness uniformity requirement is met, to require luminance level (or brightness minimum value and the ratio for requiring brightness uniformity) as most preferably
Reference brightness L0, is only corrected to the pixel intensity more than L0.
3rd embodiment
The method of the raising OLED display brightness uniformities of the present embodiment includes：S100, captures the bright of initial pictures brightness
Spend matrix；S200, the luminance level and initial pictures luminance matrix of image as requested, select optimal reference brightness, to higher than
The pixel cell of the luminance matrix of the optimal reference brightness carries out reduction brightness processed, and/or to less than the optimal reference
The pixel cell of the luminance matrix of brightness carries out raising brightness processed, to generate image rectification matrix；S300, input refers to GTG
Image；S400, carries out point multiplication operation by the respective pixel unit of the reference gray scale image and described image correction matrix and obtains
Image after correction, exports the image after the correction to OLED display screen.
Preferably, it is small in the ratio of the initial pixel brightness minimum value and minimum requirements luminance level of the OLED display screen
During the luminance level for requiring image in described, drive voltage signal level is adjusted, makes the initial pixel of the OLED display screen bright
The ratio of degree minimum value and the luminance level for requiring image is more than or equal to the luminance level for requiring image, Ran Houjin
Row luminance uniformity correction.
Fig. 4 and Fig. 5 are refer to, method of the invention shows the analog simulation for carrying out luminance uniformity correction to OLED respectively
As a result, it is seen that after iteration twice, brightness uniformity can reach more than 90%, iteration balance actual measured value,
OLED require luminance level, pixel intensity decay and luminescent lifetime in terms of can play preferable effect, obtain convergence compared with
Image rectification matrix well is simultaneously applied, to improve display brightness uniformity.
Embodiment described above is only the preferred embodiment to absolutely prove the present invention and being lifted, protection model of the invention
Enclose not limited to this.Equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is defined by claims.
Claims (10)
1. a kind of device of raising OLED display brightness uniformities, it includes OLED display screen, it is characterised in that the raising
The device of OLED display brightness uniformities also includes：
Brightness of image acquisition module, it is connected with the OLED display screen, and described image brightness acquisition module is used to capture at the beginning of one
Beginning brightness of image, the initial pictures brightness is the brightness of the OLED display screen output image；
Correction matrix module, it is connected with described image brightness acquisition module, and the correction matrix module includes a reference brightness,
The correction matrix module to higher than the reference brightness initial pictures brightness carry out reduction brightness processed, and/or to less than
The initial pictures brightness of the reference brightness carries out raising brightness processed, and the correction matrix module is used to generate an image rectification
Matrix；And
Brightness uniformity processing module, it is connected with the correction matrix module and is connected with a gray scale image module, the GTG
Image module is used for offer one and refers to gray scale image, and the brightness uniformity processing module is used for the square of the reference gray scale image
Battle array carries out point multiplication operation with described image correction matrix and obtains a correction chart picture, and the correction chart picture is the input of OLED display screen
Image.
2. the device of OLED display brightness uniformities is improved as claimed in claim 1, it is characterised in that by the reference
The point multiplication operation reciprocal that carries out of the matrix of brightness and the matrix of initial pictures brightness obtains described image correction matrix.
3. the device of OLED display brightness uniformities is improved as claimed in claim 1, it is characterised in that the correction matrix mould
Block includes a specification brightness of image, and the correction matrix module is given birth to by contrasting the specification brightness of image with initial pictures brightness
Into the reference brightness.
4. the device of OLED display brightness uniformities is improved as claimed in claim 1, it is characterised in that pass through formula Lm(x,y)
=F { Gm(x,y)·Tm(x, y) } display brightness of the correction chart picture is obtained, wherein, Lm(x, y) is the corresponding hair of m ranks gray scale
Brightness matrix, Gm(x, y) is m rank grey level's matrixes, Tm(x, y) is the corresponding image rectification matrix of m rank gray scales, initial value
It is the corresponding relation between grey level and brightness to be set to 1, F, and x, y are respectively the line number and columns of OLED display screen resolution ratio, m
It is 0~255 for corresponding gray level, scope.
5. a kind of method of raising OLED display brightness uniformities, it is characterised in that the method comprising the steps of：
S100：Brightness of image acquisition module captures the matrix of OLED display screen output image brightness, the OLED display screen output
Brightness of image is initial pictures brightness；
S200：Correction matrix module to higher than reference brightness initial pictures brightness carry out reduction brightness processed, and/or to less than
The initial pictures brightness of the reference brightness carries out raising brightness processed, is built between the reference brightness and initial pictures brightness
Vertical interative computation generates an image rectification matrix；
S300：Gray scale image module output one is with reference to gray scale image to a brightness uniformity processing module；
S400：The matrix of the reference gray scale image and described image correction matrix are carried out point by the brightness uniformity processing module
Multiplication obtains a correction chart picture, and the correction chart picture is input into OLED display screen.
6. the method for OLED display brightness uniformities is improved as claimed in claim 5, it is characterised in that the step S200 tools
Body includes：
201：The correction matrix module obtains a reference brightness by contrasting specification brightness of image and initial pictures brightness；
202：The correction matrix module carries out point to the matrix of the reference brightness with the reciprocal of the matrix of initial pictures brightness
Multiplication is realized and the pixel cell of the luminance matrix higher than the reference brightness is dropped to obtain described image correction matrix
Low-light level is handled, and/or carries out raising brightness processed to the pixel cell of the luminance matrix less than the reference brightness.
7. the method for OLED display brightness uniformities is improved as claimed in claim 6, it is characterised in that the step 201 has
Body includes step：
2011：The initial pictures brightness is contrasted with the specification brightness of image, when the initial pictures brightness most
When small value is more than or equal to the specification brightness of image, the reference is used as using the minimum brightness in the initial pictures brightness
Brightness.
8. the method for OLED display brightness uniformities is improved as claimed in claim 7, it is characterised in that the step 201 is also
Including：
2022：One requires brightness uniformity defined in the correction matrix module；
2023：Brightness uniformity, which is carried out, to be required with described to the ratio of the initial pictures brightness minimum value and specification brightness of image
Contrast；
2024：Described require that brightness is equal when the ratio of the initial pictures brightness minimum value and specification brightness of image is more than or equal to
During even property, using the specification brightness of image as reference brightness, the image to being more than reference brightness in the initial pictures brightness
It is corrected；
2025：Described brightness uniformity is required when the ratio of the initial pictures brightness minimum value and specification brightness of image is less than
When, drive circuit signal is adjusted, then the condition for making it meet the step 2011 and step 2024 is corrected.
9. the method for OLED display brightness uniformities is improved as claimed in claim 5, it is characterised in that described image corrects square
The size of battle array depends on the resolution ratio of OLED display screen.
10. the method for OLED display brightness uniformities is improved as claimed in claim 5, it is characterised in that the reference brightness
Pass through formula：
To select, as min { L (x, y) }<Lspec&min{L(x,y)}/Lspec<UrWhen, it is necessary to improve the driving of whole display panel
Signal level causes min { L (x, y) }/Lspec≥Ur；Wherein, LrFor reference brightness value, LspecFor specification brightness value, min L (x,
Y) it is } minimum value in the initial measurement of all display units of display unit panel, UrFor brightness uniformity reference value, x,
Y is respectively the line number and columns of OLED display screen resolution ratio.
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| CN106157889B (en) * | 2016-08-15 | 2019-11-29 | 昆山国显光电有限公司 | Improve the method and device of OLED display brightness uniformity |
| CN106412549B (en) * | 2016-10-28 | 2018-07-20 | 京东方科技集团股份有限公司 | Brightness of image method of adjustment and device |
| KR101747405B1 (en) * | 2017-01-06 | 2017-06-15 | 주식회사 브이오 | De-Mura Amendment Method of Display Panel |
| CN106847175B (en) * | 2017-03-01 | 2018-12-28 | 京东方科技集团股份有限公司 | Electroluminescent display panel and its uniformity of luminance compensation process, system |
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