CN106157889B - Improve the method and device of OLED display brightness uniformity - Google Patents
Improve the method and device of OLED display brightness uniformity 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
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The embodiment of the invention discloses a kind of method and devices for improving OLED display brightness uniformity, the method for improving OLED display brightness uniformity includes: the brightness of each pixel in the test image for obtaining and showing in OLED display screen, to obtain the pixel intensity matrix of image；The pixel intensity matrix of obtained image is normalized, to obtain the normalization numerical value of each pixel intensity in luminance matrix, and generates the normalization luminance matrix of image；Ghost correction is carried out using reversal point screen method to the normalization luminance matrix of image, so that the brightness uniformity of image.The method and device that the present invention improves OLED display brightness uniformity makes display brightness uniform, mentions high display quality.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of method and dress for improving OLED display brightness uniformity
It sets.
Background technique
OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) display and traditional LCD are aobvious
Show device difference, is not necessarily to backlight, the very thin coating of organic material of use and glass substrate, when a current passes through, these have
Machine material will shine.And OLED display screen can be made lighter and thinner, and visible angle is bigger, and can save significantly on electricity
Can, therefore the trend of substituted tradition CRT and LCD.OLED is divided into active matrix organic light-emitting display according to driving method
(AMOLED) and passive-matrix organic light emitting display (PMOLED).
In flat panel display, active matrix organic light-emitting display (AMOLED) is frivolous with its, actively shines, fast sound
It answers many merits such as speed, wide viewing angle, rich in color and high brightness, low-power consumption, high-low temperature resistant and is known as being after LCD by industry
Third generation display technology later, has been increasingly used at present in the portable products such as mobile phone, digital camera, medium ruler
Very little AMOLED TV screen will also start large-scale production.However, the major issue that OLED display is faced now is
Brightness irregularities.Since in OLED display, the brightness of each OLED device can be because of technique or using upper loss
Difference, therefore it is easy to appear the display brightness non-uniform phenomenons of pixel.The intensity loss speed of OLED device with it is following several
Item factor is particularly relevant, characteristic, process environments, the driving method of OLED device including OLED device etc..In addition, brightness disproportionation
Even property is particularly acute on Full-color OLED display.One Full-color OLED display has the OLED device of three kinds of colors of red, green, blue
Part.The intensity loss speed of these three devices be it is different, after prolonged use, the brightness of the OLED device of three kinds of colors
Difference will become more apparent, uneven down to there is OLED screen curtain display brightness, show image color cast, and display area occurs apparent
Ghost has seriously affected the perception effect of consumer.
Summary of the invention
The present invention provides a kind of method and device for improving OLED display brightness uniformity, enables to display brightness equal
It is even, mention high display quality.
The technical solution is as follows:
The present invention provides a kind of methods for improving OLED display brightness uniformity comprising: it obtains in OLED display screen
The brightness of each pixel in the test image of display, to obtain the pixel intensity matrix of image；It is bright to the pixel of obtained image
Degree matrix is normalized, and to obtain the normalization numerical value of each pixel intensity in luminance matrix, and generates returning for image
One changes luminance matrix；Ghost correction is carried out using reversal point screen method to the normalization luminance matrix of image, so that image is bright
Degree homogenization.
Further, the luminance matrix of obtained image is normalized, to obtain each picture in luminance matrix
The normalization numerical value of plain brightness includes:
The normalization numerical value an of pixel intensity: T=L1/L*100% is obtained by following formula, wherein T is that pixel is bright
The normalization numerical value of degree, L1 are the brightness of respective pixel, and L is reference brightness, and the reference brightness is pixel in test image
The maximum value of brightness.
Further, ghost correction is carried out using reversal point screen method to the normalization luminance matrix of image, so that image
Brightness uniformity, comprising:
The intensity correction values of each pixel in the normalization luminance matrix of image are obtained, are obtained according to intensity correction values each
The final driving value of pixel drives corresponding pixel according to the final driving value of each pixel, so that the brightness phase of each pixel
Deng.
Further, the intensity correction values of a pixel: LL=L* (1-T), wherein LL mono- are obtained by following formula
The intensity correction values of a pixel, L are reference brightness, and T is the normalization numerical value of respective pixel brightness, and the reference brightness is test
The maximum value of the brightness of pixel in image.
Further, the intensity correction values of a pixel are obtained by following formula: if T is greater than 50%, LL=L* (1-
T)/m, if T is less than 50%, LL=L* (1-T) * m, wherein LL is the intensity correction values of a pixel, and L is reference brightness, T
For the normalization numerical value of respective pixel brightness, m is gain coefficient, the reference brightness be test image in pixel brightness most
Big value.
Further, the method also includes:
After ghost corrects a period of time, lights test image and reacquire the test image shown in OLED display screen
In each pixel brightness, and judge whether the brightness of each pixel equal, if unequal, continue ghost correction until
The brightness of each pixel is equal.
The present invention provides a kind of devices for improving OLED display brightness uniformity comprising:
Module is obtained, for obtaining the brightness of each pixel in the test image shown in OLED display screen, to obtain figure
The pixel intensity matrix of picture；
Module is normalized, is normalized for the pixel intensity matrix to obtained image, to obtain brightness square
The normalization numerical value of each pixel intensity in battle array, and generate the normalization luminance matrix of image；
Correction module carries out ghost correction using reversal point screen method for the normalization luminance matrix to image, so that
The brightness uniformity of image.
Further, the normalization module is also used to obtain the normalization number an of pixel intensity by following formula
Value: T=L1/L*100%, wherein T is the normalization numerical value of pixel intensity, and L1 is the brightness of respective pixel, and L is reference brightness,
The reference brightness is the maximum value of the brightness of pixel in test image.
Further, the correction module is also used to obtain the brightness of each pixel in the normalization luminance matrix of image
Corrected value obtains the final driving value of each pixel according to intensity correction values, according to the driving pair of the final driving value of each pixel
The pixel answered, so that the brightness of each pixel is equal.
Further, the correction module is also used to obtain the intensity correction values of a pixel: LL=by following formula
L* (1-T), wherein LL is the intensity correction values of a pixel, and L is reference brightness, and T is the normalization number of respective pixel brightness
Value, the reference brightness are the maximum value of the brightness of pixel in test image.
Further, the correction module is also used to obtain the intensity correction values of a pixel by following formula: if T
Greater than 50%, then LL=L* (1-T)/m, if T is less than 50%, LL=L* (1-T) * m, wherein LL is the brightness of a pixel
Corrected value, L are reference brightness, and T is the normalization numerical value of respective pixel brightness, and m is gain coefficient, and the reference brightness is test
The maximum value of the brightness of pixel in image.
Further, described device further include: judgment module, for lighting test chart after ghost corrects a period of time
As and test image shown in reacquiring in OLED display screen in each pixel brightness, and judge that the brightness of each pixel is
It is no equal, if unequal, continue ghost correction until the brightness of each pixel is equal.
Technical solution provided in an embodiment of the present invention has the benefit that
It is bright with the pixel for obtaining image by obtaining the brightness of each pixel in the test image shown in OLED display screen
Spend matrix；The pixel intensity matrix of obtained image is normalized, to obtain each pixel intensity in luminance matrix
Normalization numerical value, and generate the normalization luminance matrix of image；Reversal point screen side is used to the normalization luminance matrix of image
Method carries out ghost correction, so that the brightness uniformity of image.So as to improve display brightness uniformity, reach each region of screen
The effect of luminance proportion can be restored more really, show image, and the factory that can increase substantially OLED display is good
Product rate and actual life guarantee brightness uniformity of the OLED display in life cycle, and are easy in existing processing procedure
It is realized in process, without increasing other process equipments and hardware, significantly reduces cost.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Fig. 1 is the step flow chart of the method for the raising OLED display brightness uniformity that first embodiment of the invention provides；
Fig. 2 is the schematic diagram of gray scale image；
Fig. 3 is the schematic diagram of the luminance matrix after normalized；
Fig. 4 is the schematic diagram of gamma correction image；
Fig. 5 is the schematic diagram of the image after correction；
Fig. 6 is the structural block diagram of the device for the raising OLED display brightness uniformity that second embodiment of the invention provides.
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, to the method and device proposed according to the present invention for improving OLED display brightness uniformity, it is specific real
Mode, structure, feature and effect are applied, detailed description is as follows.
For the present invention aforementioned and other technology contents, feature and effect refer to the preferable reality of schema in following cooperation
Applying can clearly be presented in example detailed description.By the explanation of specific embodiment, when predetermined mesh can be reached to the present invention
The technical means and efficacy taken be able to more deeply and it is specific understand, however institute's accompanying drawings are only to provide with reference to and say
It is bright to be used, it is not intended to limit the present invention.
First embodiment
Fig. 1 is the step flow chart of the method for the raising OLED display brightness uniformity that first embodiment of the invention provides.
The method of the raising OLED display brightness uniformity of the embodiment of the present invention makes display brightness uniform, mentions high display quality, please join
Fig. 1 is examined, the method for the raising OLED display brightness uniformity of the present embodiment may comprise steps of 101-107.
Step 101, the brightness of each pixel in the test image shown in OLED display screen is obtained, to obtain the picture of image
Plain luminance matrix.
In this step, can be used photodetector measurement display screen display test image in each pixel it is bright
Then degree can be obtained by the pixel intensity matrix of image by reading the brightness of each pixel acquired in photodetector.
Test image is preset gray scale image, such as grid image 201 as shown in Figure 2.In the LTPS base for carrying out OLED display screen
When plate processing procedure, photodetector (photo detectors namely TFT pipe) can be made, to each picture in monitoring image
The luminous brightness of element.
Step 103, the pixel intensity matrix of obtained image is normalized, it is each in luminance matrix to obtain
The normalization numerical value of pixel intensity, and generate the normalization luminance matrix of image.
Wherein it is possible to the normalization numerical value of any one pixel intensity: T=L1/L*100% is obtained by following formula,
In, T is the normalization numerical value of pixel intensity, and L1 is the brightness of respective pixel, and L is reference brightness, and reference brightness is test image
The maximum value of the brightness of middle pixel.The normalization that the pixel intensity of image shown in Fig. 2 generates image after normalized is bright
It is as shown in Figure 3 to spend matrix.
Step 105, ghost correction is carried out using reversal point screen method to the normalization luminance matrix of image, so that image
Brightness uniformity.
Wherein, ghost correction is carried out using reversal point screen method and is referred to as reversal point screen burning machine, i.e., image returned
One change luminance matrix makes corrections, and specifically, may comprise steps of:
The intensity correction values of each pixel in the normalization luminance matrix of image are obtained, are obtained according to intensity correction values each
The final driving value of pixel drives corresponding pixel according to the final driving value of each pixel, so that the brightness phase of each pixel
Deng.The above method namely carries out reduction brightness processed to pixel of high brightness, and the pixel low to brightness improve at brightness
The process of reason can achieve the effect of each regional luminance equilibrium of screen to burn machine method by above-mentioned reversal point screen.
Preferably, the intensity correction values of a pixel: LL=L* (1-T) can be obtained by following formula, wherein LL is
The intensity correction values (the final brightness of i.e. one pixel) of one pixel, L are reference brightness, and T is the normalizing of respective pixel brightness
Change numerical value, reference brightness is the maximum value of the brightness of pixel in test image.Such as: if the normalization numerical value of pixel is 98%,
Reference brightness is 300, then intensity correction values are 300 × (1-98%)=300*2%=6nit.If the normalization numerical value of pixel is
65%, then intensity correction values are 300 × (1-65%)=300*35%=105nit, carry out gamma correction with the image to Fig. 1
For, timing should carry out gamma correction to Fig. 1 using the brightness of image 401 shown in Fig. 4, i.e., using the brightness of Fig. 4 to Fig. 1
Carry out a screen burning machine.
Preferably, the intensity correction values of a pixel can also be obtained using following formula: if T be greater than preset value (such as
50%), then LL=L* (1-T)/m, if T is less than preset value (such as 50%), LL=L* (1-T) * m, wherein LL is a picture
The intensity correction values of element, L are reference brightness, and T is the normalization numerical value of respective pixel brightness, and reference brightness is picture in test image
The maximum value of the brightness of element, m is gain coefficient, can be any number greater than 1, such as the integers or small such as 2,2.5,3,4,5
Number.Such as by taking preset value 50% as an example, if gain coefficient m is that 2, T is less than preset value 50%, then intensity correction values increasing is twice,
If T is greater than preset value 50%, intensity correction values reduce one times, for example, if the normalization numerical value of pixel is 98%, gain coefficient
M is 2, then intensity correction values are 300 × (1-98%)/2=300*1%=3nit.If the normalization numerical value of pixel is 40%,
Intensity correction values are 300 × (1-40%) * 2=300*160%=480nit.Ghost correction rate can be improved in the above method,
In the case where other parameters (such as LL, T, L) are constant, the multiple of correction rate is related with gain coefficient, if gain coefficient is
2, then correction rate doubles, if gain coefficient is 3, correction rate is improved twice, and so on, it can be improved using the above method
Ghost correction rate be primarily due to intensity correction values it is higher when, it is bigger to the loss of OLED device, therefore correction time will
Shorten.
It preferably, can also include step 107 after step 105.
Step 107, after ghost corrects a period of time (such as 1 hour), light test image (can be gray scale image,
Such as white picture image) and reacquire the brightness of each pixel in the test image shown in OLED display screen, and judge every
Whether the brightness of a pixel equal, if unequal, continue ghost correction until each pixel brightness it is equal, that is, continue
Carry out step 103-105 terminates if equal.(what pixel intensity was equal in the image 501 after being illustrated in figure 5 correction shows
It is intended to).
In conclusion the method provided in an embodiment of the present invention for improving OLED display brightness uniformity, by obtaining OLED
The brightness of each pixel in the test image of screen display is shown, to obtain the pixel intensity matrix of image；To obtained image
Pixel intensity matrix be normalized, to obtain the normalization numerical value of each pixel intensity in luminance matrix, and generate
The normalization luminance matrix of image；Ghost correction is carried out using reversal point screen method to the normalization luminance matrix of image, so that
The brightness uniformity of image.So as to improving display brightness uniformity, achieve the effect that each regional luminance of screen is balanced, it can
More true reduction, display image, and factory yields and the actual life of OLED display can be increased substantially,
Guarantee brightness uniformity of the OLED display in life cycle, and be easy to realize on existing processing procedure and process, without increasing
Add other process equipments and hardware, significantly reduces cost.
The following are the device of the invention embodiments, and the details of not detailed description in Installation practice can refer to above-mentioned
Corresponding embodiment of the method.
Second embodiment
Fig. 6 is the main frame frame of the device for the raising OLED display brightness uniformity that second embodiment of the invention provides
Figure.Referring to FIG. 6, improve OLED display brightness uniformity device include: obtain module 601, normalization module 603 and
Correction module 605.
Specifically, module 601 is obtained, for obtaining the bright of each pixel in the test image shown in OLED display screen
Degree, to obtain the pixel intensity matrix of image；
Module 603 is normalized, is normalized for the pixel intensity matrix to obtained image, to obtain brightness
The normalization numerical value of each pixel intensity in matrix, and generate the normalization luminance matrix of image；
Correction module 605 carries out ghost correction using reversal point screen method for the normalization luminance matrix to image, with
Make the brightness uniformity of image.
Preferably, module 603 is normalized, is also used to obtain the normalization numerical value an of pixel intensity: T by following formula
=L1/L*100%, wherein T is the normalization numerical value of pixel intensity, and L1 is the brightness of respective pixel, and L is reference brightness, reference
Brightness is the maximum value of the brightness of pixel in test image.
Preferably, correction module 605 are also used to obtain the gamma correction of each pixel in the normalization luminance matrix of image
Value, obtains the final driving value of each pixel according to intensity correction values, is driven according to the final driving value of each pixel corresponding
Pixel, so that the brightness of each pixel is equal.
Preferably, correction module 605 are also used to obtain the intensity correction values of a pixel: LL=L* by following formula
(1-T), wherein LL is the intensity correction values of a pixel, and L is reference brightness, and T is the normalization numerical value of respective pixel brightness,
Reference brightness is the maximum value of the brightness of pixel in test image.
Preferably, correction module 605 are also used to obtain the intensity correction values of a pixel by following formula: if T is greater than
Preset value, then LL=L* (1-T)/m, if T is less than preset value, LL=L* (1-T) * m, wherein LL is the brightness of a pixel
Corrected value, L are reference brightness, and T is the normalization numerical value of respective pixel brightness, and reference brightness is the brightness of pixel in test image
Maximum value, m is gain coefficient, can be any number greater than 1, such as the integers such as 2,2.5,3,4,5 or decimal.
Preferably, the device of OLED display brightness uniformity is improved, further includes: judgment module 607, for being corrected in ghost
After a period of time, lights test image and reacquires the brightness of each pixel in the test image shown in OLED display screen,
And judge whether the brightness of each pixel is equal, if unequal, continue ghost correction up to the brightness phase of each pixel
Deng.
In conclusion the device provided in an embodiment of the present invention for improving OLED display brightness uniformity, by obtaining OLED
The brightness of each pixel in the test image of screen display is shown, to obtain the pixel intensity matrix of image；To obtained image
Pixel intensity matrix be normalized, to obtain the normalization numerical value of each pixel intensity in luminance matrix, and generate
The normalization luminance matrix of image；Ghost correction is carried out using reversal point screen method to the normalization luminance matrix of image, so that
The brightness uniformity of image.So as to improving display brightness uniformity, achieve the effect that each regional luminance of screen is balanced, it can
More true reduction, display image, and factory yields and the actual life of OLED display can be increased substantially,
Guarantee brightness uniformity of the OLED display in life cycle, and be easy to realize on existing processing procedure and process, without increasing
Add other process equipments and hardware, significantly reduces cost.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above are modified or are modified
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (6)
1. a kind of method for improving OLED display brightness uniformity, characterized in that it comprises:
The brightness of each pixel in the test image shown in OLED display screen is obtained, to obtain the pixel intensity matrix of image；
The pixel intensity matrix of obtained image is normalized, to obtain returning for each pixel intensity in luminance matrix
One changes numerical value, and the pixel intensity of image generates the normalization luminance matrix of image after normalized, wherein by following public
Formula obtains the normalization numerical value an of pixel intensity: T=L1/L*100%, wherein T is the normalization numerical value of pixel intensity, L1
For the brightness of respective pixel, L is reference brightness, and the reference brightness is the maximum value of the brightness of pixel in test image；
The intensity correction values of each pixel in the normalization luminance matrix of image, root are obtained according to reference brightness and normalization numerical value
Ghost correction is carried out according to normalization luminance matrix of the intensity correction values to image, so that the brightness uniformity of image, wherein pass through
Following formula obtains the intensity correction values of a pixel: if T is greater than preset value, LL=L* (1-T)/m, if T is less than preset value,
Then LL=L* (1-T) * m, wherein LL is the intensity correction values of a pixel, and L is reference brightness, and T is returning for respective pixel brightness
One changes numerical value, and the reference brightness is the maximum value of the brightness of pixel in test image, and m is gain coefficient, and m is appointing greater than 1
Meaning numerical value.
2. the method according to claim 1 for improving OLED display brightness uniformity, which is characterized in that according to gamma correction
It is worth and ghost correction is carried out to the normalization luminance matrix of image, so that the brightness uniformity of image, comprising:
The final driving value of each pixel is obtained according to intensity correction values, is driven according to the final driving value of each pixel corresponding
Pixel, so that the brightness of each pixel is equal.
3. the method according to claim 1 for improving OLED display brightness uniformity, which is characterized in that further include:
After ghost corrects a period of time, lights test image and reacquire every in the test image shown in OLED display screen
The brightness of a pixel, and judge whether the brightness of each pixel is equal, if unequal, continue ghost correction until each
The brightness of pixel is equal.
4. a kind of device for improving OLED display brightness uniformity, characterized in that it comprises:
Module is obtained, for obtaining the brightness of each pixel in the test image shown in OLED display screen, to obtain image
Pixel intensity matrix；
Module is normalized, is normalized for the pixel intensity matrix to obtained image, to obtain in luminance matrix
The normalization numerical value of each pixel intensity, the pixel intensity of image generate the normalization brightness square of image after normalized
Battle array, wherein the normalization module obtains the normalization numerical value an of pixel intensity: T=L1/L*100% by following formula,
Wherein, T is the normalization numerical value of pixel intensity, and L1 is the brightness of respective pixel, and L is reference brightness, and the reference brightness is to survey
Attempt the maximum value of the brightness of pixel as in；
Correction module, for obtaining each pixel in the normalization luminance matrix of image according to reference brightness and normalization numerical value
Intensity correction values carry out ghost correction according to normalization luminance matrix of the intensity correction values to image, so that the brightness of image is equal
It homogenizes, the correction module is also used to obtain the intensity correction values of a pixel by following formula: if T is greater than preset value,
LL=L* (1-T)/m, if T is less than preset value, LL=L* (1-T) * m, wherein LL is the intensity correction values of a pixel, and L is
Reference brightness, T are the normalization numerical value of respective pixel brightness, and the reference brightness is the maximum of the brightness of pixel in test image
Value, m are gain coefficient, and m is any number greater than 1.
5. the device according to claim 4 for improving OLED display brightness uniformity, which is characterized in that the straightening die
Block is also used to obtain the final driving value of each pixel according to intensity correction values, is driven according to the final driving value of each pixel
Corresponding pixel, so that the brightness of each pixel is equal.
6. the device according to claim 4 for improving OLED display brightness uniformity, which is characterized in that further include: judgement
Module, for lighting test image and reacquiring the test chart shown in OLED display screen after ghost corrects a period of time
The brightness of each pixel as in, and judge whether the brightness of each pixel is equal, if unequal, it is straight to continue ghost correction
Brightness to each pixel is equal.
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| US10417966B2 (en) | 2017-09-30 | 2019-09-17 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd | Brightness regulation method of a display panel and brightness regulation device |
| CN107633808A (en) * | 2017-09-30 | 2018-01-26 | 深圳市华星光电半导体显示技术有限公司 | The brightness adjusting method and brightness regulating apparatus of display panel |
| CN109618142B (en) * | 2018-12-24 | 2021-03-09 | 威创集团股份有限公司 | Method and device for correcting brightness uniformity before splicing wall screen |
| CN111371965B (en) * | 2020-03-23 | 2021-09-28 | 华兴源创(成都)科技有限公司 | Image processing method, device and equipment for eliminating interference in brightness shooting of display screen |
| CN111402797B (en) * | 2020-03-30 | 2022-02-22 | 昆山国显光电有限公司 | Brightness uniformity compensation method and device and display equipment |
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