CN106205488B - Extend the method and display equipment in display of organic electroluminescence service life - Google Patents
Extend the method and display equipment in display of organic electroluminescence service life Download PDFInfo
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- CN106205488B CN106205488B CN201610839051.2A CN201610839051A CN106205488B CN 106205488 B CN106205488 B CN 106205488B CN 201610839051 A CN201610839051 A CN 201610839051A CN 106205488 B CN106205488 B CN 106205488B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005401 electroluminescence Methods 0.000 title claims abstract description 20
- 230000003679 aging effect Effects 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims description 17
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000013316 zoning Methods 0.000 claims description 7
- 208000015181 infectious disease Diseases 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 9
- 230000007423 decrease Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
The invention discloses a kind of methods for extending the display of organic electroluminescence service life, comprising: display screen is divided into multiple subregions；Calculate the aging effects factor of each subregion；The brightness ratio coefficient of each subregion is calculated according to the characteristics of image of each subregion and the aging effects factor；The actual displayed brightness of the display screen is calculated according to the brightness ratio coefficient；Image is exported according to the actual displayed brightness.The present invention also provides a kind of display equipment.Brightness ratio coefficient is calculated as Consideration using the aging effects factor and characteristics of image and carries out brightness processed, reduce the destroying infection to overall image quality, height gray level mixes subregion and increases or reduces strength disposal according to simple and the location of complexity and the subregion selection of image, guarantee to adjust brightness of image under the premise of picture quality influences, delay OLED to fail, extends the OLED service life.
Description
Technical field
The present invention relates to field of display technology, more particularly, to a kind of method for extending the display of organic electroluminescence service life
And display equipment.
Background technique
Display of organic electroluminescence (Organic Light Emitting Diode, OLED) has high contrast, low
Power consumption, response time be short, wide viewing angle and the advantages that flexibility, it is made to have attracted a large amount of concern.But OLED display exists
Serious luminance degradation and life time decay problem.The decline rate and display brightness of OLED is positively correlated, i.e. brightness height decline is fast, bright
It is slow to spend low decline, the main method for delaying OLED to fail is the display brightness for reducing high grade grey level region in image.
In the prior art, a kind of processing mode for delaying OLED to fail is one brightness maxima of setting, will be above brightness
The gray level of maximum value is all shown with the brightness, but the method will lead to high grade grey level and generate gray scale truncation, missing image
Details influences picture quality；Another processing mode be by the display brightness of entire gray scale interval all linear reductions, make gray scale with
Brightness curve still maintains monotonic increase, will not generate gray scale truncation, but reduce to the biggish high grade grey level brightness of aging effects
While, the brightness of the low gray level little to aging effects can be also reduced, causes image whole partially dark；Other processing modes are also
Including, when keeping the brightness of low gray level constant, the brightness range of high grade grey level is compressed, the brightness of high grade grey level has both been reduced,
Gray scale-brightness curve monotone increasing is maintained, gray scale truncation is not generated, in turn ensures the brightness of image of low gray level areas not by shadow
It rings, but the high-contrast area for existing simultaneously height gray level, this method can reduce the contrast in the region.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method for extending the display of organic electroluminescence service life and show
Show equipment, OLED can not be delayed to fail under the premise of guaranteeing picture quality not by larger impact in the prior art to solve
Problem.
In order to solve the above technical problems, on the one hand, the present invention, which provides, a kind of extends display of organic electroluminescence service life
Method, comprising:
Display screen is divided into multiple subregions；
Calculate the aging effects factor of each subregion；
The bright of each subregion is calculated according to the characteristics of image of each subregion and the aging effects factor
Spend proportionality coefficient；
The actual displayed brightness of the display screen is calculated according to the brightness ratio coefficient；
Image is exported according to the actual displayed brightness.
Further, each sub-district is calculated according to the characteristics of image of each subregion and the aging effects factor
The brightness ratio coefficient in domain, comprising:
According to the institute of the aging effects factor and the central pixel point of each subregion of described image feature calculation
State brightness ratio coefficient；
The brightness ratio coefficient of the rest of pixels point of each subregion is calculated by interpolation method.
Further, the brightness ratio system of the rest of pixels point that each subregion is calculated by interpolation method
Number, comprising:
Calculate the brightness ratio system for being located at the rest of pixels point of edge subregion of the display screen edge
When number, extends outwardly from the edge subregion and extend subregion, and the central pixel point of the extension subregion
The brightness ratio coefficient value is equal with the brightness ratio coefficient value of the central pixel point of the edge subregion, leads to
Cross the brightness ratio coefficient that interpolation method calculates the rest of pixels point of each edge subregion.
Further, after the actual displayed brightness that the display screen is calculated according to the brightness ratio coefficient, institute
State method further include:
Whether the picture quality for detecting the image shown according to the actual displayed brightness, which meets display, requires；
If meeting the display requirement, image is exported,
If being unsatisfactory for the display requirement, the brightness ratio coefficient of each subregion is recalculated.
Further, whether the picture quality for detecting the image shown according to the actual displayed brightness meets display and wants
It asks, comprising:
The Y-PSNR of the image shown according to the actual displayed brightness is calculated,
When the Y-PSNR is not less than Y-PSNR threshold value, image is exported,
When the Y-PSNR is less than the Y-PSNR threshold value, the described of each subregion is recalculated
Brightness ratio coefficient.
Further, whether the picture quality for detecting the image shown according to the actual displayed brightness meets display and wants
It asks, comprising:
The difference of the average brightness of original image and the average brightness of the actual displayed brightness is calculated,
When the difference is less than difference threshold, image is exported,
When the difference is not less than the difference threshold, the brightness ratio system of each subregion is recalculated
Number.
Further, the aging effects factor is the weighted average levels of each subregion.
On the other hand, the present invention also provides a kind of display equipment, and the display equipment includes sequence controller, the timing
Controller includes:
Zoning unit, for that will show that screen is divided into multiple subregions；
Computing unit, for calculating the aging effects factor of each subregion, and according to each subregion
Characteristics of image and the aging effects factor calculate the brightness ratio coefficient of each subregion, and according to the brightness
Proportionality coefficient calculates the actual displayed brightness of the display screen.
Further, the processor further includes detection unit, for detecting the figure shown according to the actual displayed brightness
Whether the picture quality of picture, which meets display, requires；
If meeting the display requirement, image is exported,
If being unsatisfactory for the display requirement, the brightness ratio coefficient of each subregion is recalculated.
Further, the computing unit is also used to calculate the peak value noise of the image shown according to the actual displayed brightness
Than, and calculate the difference of the average brightness of original image and the average brightness of the actual displayed brightness.
Beneficial effects of the present invention are as follows: display screen is divided into multiple subregions and individually handles the picture of each subregion
The brightness of vegetarian refreshments, calculated result is accurate, and brightness processed precision is high, and using the aging effects factor and characteristics of image as Consideration
It calculates brightness ratio coefficient and carries out brightness processed, low gray level subregion does not make brightness processed, and high grade grey level increases at brightness
Reason dynamics reduces the destroying infection to overall image quality, and height gray level mixing subregion is according to the simple of image and again
The selection of the location of miscellaneous degree and the subregion increases or reduces strength disposal, guarantees to adjust under the premise of picture quality influences
Brightness of image delays OLED to fail, and extends the OLED service life.
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
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other obvious modes of texturing are obtained according to these attached drawings.
Fig. 1 is the method flow schematic diagram in the extension display of organic electroluminescence service life that the embodiment of the present invention provides.
Fig. 2 is the input gray grade of the method in the extension display of organic electroluminescence service life that the embodiment of the present invention provides
With the relation curve of output gray level.
Fig. 3 is the display screen of the method in the extension display of organic electroluminescence service life that the embodiment of the present invention provides
The method for dividing subregion.
Fig. 4 is the schematic device of display equipment provided in an embodiment of the present invention.
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.
The embodiment of the present invention provides the method and display equipment in a kind of extension display of organic electroluminescence service life, can extend
The display of organic electroluminescence service life.In the specific implementation, showing that equipment may include but be not limited to described in the embodiment of the present invention:
Liquid crystal display, mobile phone, tablet computer etc. show equipment.
It is the method flow in the extension display of organic electroluminescence service life that the embodiment of the present invention provides referring to Fig. 1, Fig. 1
Schematic diagram.The method for extending the display of organic electroluminescence service life can be controlled the hardware of display equipment by software systems to hold
Row.As shown in Figure 1, the method may include following steps:
S101 inputs original image.
Display device driving circuit receives the digital signal that system board is inputted by system interface, and digital signal contains
The image information that system board provides.Specifically, digital signal includes that rGB data signal, data sampling clock signal, data make
It can signal, line synchronising signal and frame synchronizing signal.The image information of system board input is the original image for showing equipment, original
Brightness of image is higher, and OLED display shows the problem of original image will appear serious luminance degradation and life time decay for a long time,
Therefore the subsequent brightness to original image is needed to be handled the service life for extending OLED display to delay OLED to fail.
Display screen is divided into M × N number of subregion by S102.
By resolution ratio be m × n display screen be divided into M × N number of subregion, wherein the value range of M and N be 1≤M≤
M, 1≤N≤n.The individually brightness of the pixel of processing each subregion, calculated result is accurate, and brightness processed precision is high, M and N's
Be worth it is bigger, sub-zone dividing it is more careful, the precision of brightness processed is higher, and influence of the brightness processed to picture quality is smaller, but
It will increase amount of calculation.
S103 calculates the aging effects factor of each subregion.
The aging effects factor is each sub-region right average level, reflects low gray level and high grade grey level region to OLED's
The calculation formula of the difference of aging effects, the aging effects factor is
η indicates the aging effects factor of each subregion, and G indicates the grey scale table indicating value of pixel data, and T indicates peak value ash
Grade is spent, if input digital video data is 8, the value of peak grayscale level is 255, wherein n is indicated according to panel characteristics and answered
The constant determined with factors such as environment.The weighted average levels of low gray level subregion are small, and display brightness is low, to the OLED longevity
The influence of life is also smaller, therefore does not need to handle the brightness of low gray level region；The weighted average of high grade grey level subregion
Level is big, and display brightness is high, and the influence to the OLED service life is also larger, therefore needs the increase processing power of the brightness to high grade grey level region
Degree.
S104 calculates the brightness ratio coefficient of each subregion.
Each subregion includes multiple pixels, first the brightness ratio system of the central pixel point of calculating each subregion
Number, then the brightness ratio coefficient of the rest of pixels point by interpolation method calculating each subregion.Wherein, in each subregion
The calculation method of the brightness ratio coefficient of imago vegetarian refreshments is as follows:
Since the decline rate and display brightness of OLED are positively correlated, i.e. brightness height decline is fast, and the low decline of brightness is slow, display screen
All subregions of curtain divide into low gray level subregion, high grade grey level subregion according to display brightness and exist simultaneously high low ash
The subregion for spending grade pixel, by reflecting that the aging effects factor of brightness calculates brightness ratio coefficient.
Specifically, the weighted average levels of low gray level subregion are smaller, brightness is low, and the aging effects factor is smaller, is not required to
Brightness processed is carried out, the value of brightness ratio coefficient is 1；The weighted average levels of high grade grey level subregion are larger, and brightness is high, the longevity
It is larger to order impact factor, needs to increase the strength disposal to brightness, the value of brightness ratio coefficient is between 0~1, and service life shadow
The sound factor is bigger, and brightness ratio coefficient is smaller.
The subregion for existing simultaneously high and low gray-level pixels point introduces box counting algorithm brightness ratio coefficient, in conjunction with figure
2, the relation curve of input gray grade (original image) and output gray level is according to characteristics of image dynamic change.Characteristics of image includes
The position of the simple or complexity and subregion of the picture material of subregion on the display screen.Specifically, picture material compared with
Be usually image background etc. for simple region and screen edge region include the less region of image information, is not observer
The region noticed again, therefore the region or screen edge region fairly simple to picture material is needed to increase strength disposal, brightness ratio
Example coefficient is smaller；The more complicated region of picture material and screen center region contain the main information of image, often see
The region that the person of examining more notices, therefore the region or screen center region more complicated to picture material is needed to reduce strength disposal,
Brightness ratio coefficient is larger.
The brightness ratio coefficient calculation method of the central pixel point of each subregion combines the aging effects factor and image
Feature, low gray level subregion brightness ratio coefficient value is 1, and without brightness processed, low gray level subregion keeps original graph
The picture quality of picture；High grade grey level subregion brightness ratio coefficient value is to increase brightness processed dynamics, high grade grey level between 0~1
Subregion reduces brightness display and alleviates OLED luminance degradation and life time decay；Exist simultaneously the sub-district of high and low gray-level pixels point
Domain is according to box counting algorithm brightness ratio coefficient, and brightness does not mutate between guaranteeing pixel, maintains in the subregion
Contrast guarantees to adjust brightness of image under the premise of picture quality influences, delays OLED to fail, extend the OLED service life.
In the present embodiment, after obtaining the brightness ratio coefficient of the central pixel point of each subregion, pass through interpolation method meter
Calculate the brightness ratio coefficient of the rest of pixels point of each subregion.Further, it in conjunction with Fig. 3, calculates and is located at display screen edge
Edge subregion rest of pixels point brightness ratio coefficient when, from edge, subregion, which extends outwardly, extends subregion, and
Extend the brightness ratio coefficient of the brightness ratio coefficient value of the central pixel point of subregion and the central pixel point of edge subregion
It is worth equal, the brightness ratio coefficient of the rest of pixels point of each edge subregion is calculated by interpolation method.As shown in figure 3, the 1st
A line extension subregion is respectively extended in the top of row subregion and the lower section of M row subregion, the 1st column subregion left with
Respectively extend column extension subregion in the right of Nth column subregion.It is maintained according to the OLED after the brightness ratio coefficient processing
Gray scale-brightness curve monotone increasing does not generate gray scale truncation, in turn ensures that the brightness of image of low gray level areas is unaffected, right
In the subregion for the high contrast for existing simultaneously high and low gray level, the contrast in the subregion is maintained.
S105 calculates the actual displayed brightness of display screen according to brightness ratio coefficient.
Specifically, calculating the original image after brightness processed according to the corresponding brightness ratio coefficient of each pixel
Actual displayed brightness.
S106, whether detection image quality, which meets display, requires.
It is required specifically, whether the picture quality for the image that detection is shown according to actual displayed brightness meets display, if full
Foot display requires, then shows that screen exports image；If being unsatisfactory for display to require, the brightness ratio of each subregion is recalculated
Coefficient.
In a kind of embodiment, pass through the Y-PSNR detection image matter for calculating the image shown according to actual displayed brightness
Whether amount, which meets display, requires.Y-PSNR is the destructive noise for the precision for indicating signal maximum possible power and influencing it
The ratio of power, it is the objective measurement approach of most common criticism image quality.Specifically, Y-PSNR calculation formula is
Wherein, PSNR indicates that the Y-PSNR of output image, MSE indicate to output and input the mean square deviation of image, specifically
,
Wherein, N and M respectively indicates input picture in the pixel number in horizontal and vertical direction, grefAnd ginIt respectively indicates
After processing and original image (x, y) pixel gray-scale value.
PSNR value is bigger, and it is fewer to represent distortion.To the image after reduction brightness processed, PSNR value is more greater than PSNR threshold value,
Picture quality is better, and selected brightness ratio coefficient is more reasonable, wherein PSNR threshold value is according to the figure for showing equipment final output
The practical image quality of picture requires to determine.Further, when PSNR value is not less than PSNR threshold value, treated, and image satisfaction display is wanted
It asks, display screen exports image；When PSNR value is less than PSNR threshold value, treated, and image is unsatisfactory for display requirement, counts again
Calculate the brightness ratio coefficient of each subregion.
In a kind of embodiment, pass through the difference of the average brightness of the average brightness and actual displayed brightness that calculate original image
Whether value detection image quality, which meets display, requires, which reflects the difference of actual displayed brightness Yu original image brightness.
Specifically, the average brightness of original image and the difference calculation formula of the average brightness of actual displayed brightness are
Wherein, N and M respectively indicates original image in the pixel number in horizontal and vertical direction, LrefAnd LinIt respectively indicates
After processing and original image is in the brightness value of (x, y) pixel, and MB value is smaller, and actual displayed brightness and the brightness of original image are got over
Close, the picture quality difference of treated image and original image is smaller.MB value is more less than MB threshold value, and picture quality is better,
Selected brightness ratio coefficient is more reasonable, wherein MB threshold value is wanted according to the practical image quality of the image of display equipment final output
Ask decision.Further, when difference is less than MB threshold value, treated, and image meets display requirement, and display screen exports image；
When difference is not less than MB threshold value, treated, and image is unsatisfactory for display requirement, recalculates the brightness ratio of each subregion
Coefficient.
Detect whether the picture quality that show according to actual displayed brightness meets display requirement, avoid partial pixel point due to
The aging effects factor and/or the improper situation for causing image quality loss larger of box counting algorithm are unsatisfactory for what display required
Actual displayed brightness will recalculate its corresponding brightness ratio coefficient, and the longevity can be suitably adjusted during recalculating
Influence of the impact factor to brightness ratio coefficient is ordered, also can change influence of the characteristics of image to brightness ratio coefficient.
S107 exports image.
Specifically, treated image meets after display requires through detection, OLED shows image according to actual displayed brightness.
Display screen is divided into multiple subregions and individually handles the brightness of the pixel of each subregion, calculated result essence
Really, brightness processed precision is high, and calculates brightness ratio coefficient as Consideration using the aging effects factor and characteristics of image and go forward side by side
Row brightness processed, low gray level subregion do not make brightness processed, and high grade grey level increases brightness processed dynamics, reduces to overall diagram
The destroying infection of image quality amount, height gray level mix subregion according to locating for the simple and complexity of image and the subregion
Position selection increases or reduces strength disposal, guarantees to adjust brightness of image under the premise of picture quality influences, OLED is delayed to fail,
Extend the OLED service life.
The present invention also provides a kind of display equipment, which includes display panel and driving circuit, and driving circuit drives
Dynamic display panel work.Wherein, driving circuit includes sequence controller (TCON), data drive circuit, scan drive circuit etc..
In the present embodiment, sequence controller 100 can be specific integrated circuit (ASIC), FPGA or microcontroller etc..Referring to fig. 4,
Fig. 4 is the schematic device of sequence controller 100 provided in an embodiment of the present invention.As shown in figure 4, sequence controller 100 includes:
Zoning unit 101, computing unit 102, detection unit 103.In some embodiments, zoning unit 101, computing unit 102, inspection
Surveying unit 103 is that can call the program instruction executed by sequence controller 100.In further embodiments, zoning unit 101,
Computing unit 102, detection unit 103 are the circuit structure in sequence controller 100.
Zoning unit 101 will be for that will show that screen is divided into multiple subregions.Specifically, zoning unit 101 is by resolution ratio
It is divided into M × N number of subregion for the display screen of m × n, wherein the value range of M and N is 1≤M≤m, 1≤N≤n.Individually place
The brightness of the pixel of each subregion is managed, calculated result is accurate, and brightness processed precision is high, and the value of M and N are bigger, and subregion is drawn
That divides is more careful, and the precision of brightness processed is higher, and influence of the brightness processed to picture quality is smaller, but will increase computing unit
102 amounts of calculation.
Computing unit 102 is used to calculate the aging effects factor of each subregion, and according to the image of each subregion
Feature and the aging effects factor calculate the brightness ratio coefficient of each subregion, and calculate display screen according to brightness ratio coefficient
The actual displayed brightness of curtain.
Specifically, computing unit 102 successively carries out following calculating process:
1, the aging effects factor of each subregion is calculated.
The aging effects factor is each sub-region right average level, reflects low gray level and high grade grey level region to OLED's
The calculation formula of the difference of aging effects, the aging effects factor is
η indicates the aging effects factor of each subregion, and G indicates the grey scale table indicating value of pixel data, and T indicates peak value ash
Grade is spent, if input digital video data is 8, the value of peak grayscale level is that 255, n is indicated according to panel characteristics and applied ring
The constant that the factors such as border determine.
2, the brightness ratio coefficient of each subregion is calculated.
The brightness ratio coefficient calculation method of the central pixel point of each subregion combines the aging effects factor and image
Feature, specifically, the weighted average levels of low gray level subregion are smaller, brightness is low, and the aging effects factor is smaller, do not need into
Row brightness processed, the value of brightness ratio coefficient are 1；The weighted average levels of high grade grey level subregion are larger, and brightness is high, service life shadow
It is larger to ring the factor, needs to increase the strength disposal to brightness, the value of brightness ratio coefficient is between 0~1, and aging effects because
Son is bigger, and brightness ratio coefficient is smaller.
The subregion for existing simultaneously high and low gray-level pixels point then introduces box counting algorithm brightness ratio coefficient.Image
Feature includes the position of the simple or complexity and subregion of the picture material of subregion on the display screen.Specifically, figure
Include the less region of image information as the relatively simple region of content and screen edge region are usually image background etc., is not
Observer focuses on the region noticed, therefore the region or screen edge region fairly simple to picture material is needed to increase processing power
Degree, brightness ratio coefficient are larger；The more complicated region of picture material and screen center region contain the main information of image,
The often region that observer more notices, therefore need at the region or screen center's region reduction more complicated to picture material
Reason dynamics, brightness ratio coefficient are smaller.
3, the actual displayed brightness of display screen is calculated.
Specifically, calculating the original image after brightness processed according to the corresponding brightness ratio coefficient of each pixel
Actual displayed brightness.
4, the Y-PSNR of the image shown according to actual displayed brightness is calculated, and calculates the average bright of original image
The difference of degree and the average brightness of the image shown according to actual displayed brightness.
Specifically, Y-PSNR is the destructive noise power for the precision for indicating signal maximum possible power and influencing it
Ratio, it is the objective measurement approach of most common criticism image quality, and Y-PSNR calculation formula is
Wherein, PSNR indicates that the Y-PSNR of output image, MSE indicate to output and input the mean square deviation of image, specifically
,
Wherein, N and M respectively indicates input picture in the pixel number in horizontal and vertical direction, grefAnd ginIt respectively indicates
After processing and original image (x, y) pixel gray-scale value.
PSNR value is bigger, and it is fewer to represent distortion.To the image after reduction brightness processed, PSNR value is more greater than PSNR threshold value,
Picture quality is better, and selected brightness ratio coefficient is more reasonable, wherein PSNR threshold value is according to the figure for showing equipment final output
The practical image quality of picture requires to determine.
The difference of the average brightness of the average brightness and actual displayed brightness of original image reflect actual displayed brightness with
The difference of original image brightness.Specifically, the difference meter of the average brightness of original image and the average brightness of actual displayed brightness
Calculating formula is
Wherein, N and M respectively indicates original image in the pixel number in horizontal and vertical direction, LrefAnd LinIt respectively indicates
After processing and original image is in the brightness value of (x, y) pixel, and MB value is smaller, and actual displayed brightness and the brightness of original image are got over
Close, the picture quality difference of treated image and original image is smaller.MB value is more less than MB threshold value, and picture quality is better,
Selected brightness ratio coefficient is more reasonable, wherein MB threshold value is wanted according to the practical image quality of the image of display equipment final output
Ask decision.
Whether the picture quality that detection unit 103 is used to detect the image shown according to actual displayed brightness, which meets display, is wanted
It asks, is required if meeting display, show that screen exports image；If being unsatisfactory for display to require, each subregion is recalculated
Brightness ratio coefficient.
In a kind of embodiment, the peak for the image that detection unit 103 is shown by detection according to the actual displayed brightness
Value signal-to-noise ratio judges whether picture quality meets display and require, when Y-PSNR is not less than Y-PSNR threshold value, display
Screen exports image；When Y-PSNR is less than Y-PSNR threshold value, the brightness ratio of each subregion is recalculated
Example coefficient.
In another embodiment, average brightness and actual displayed brightness of the detection unit 103 by detection original image
Average brightness difference judge picture quality whether meet display require, when difference be less than difference threshold when, display screen it is defeated
Image out；When difference is not less than difference threshold, the brightness ratio coefficient of each subregion is recalculated.
Display screen is divided into multiple subregions and individually handles the brightness of the pixel of each subregion, calculated result essence
Really, brightness processed precision is high, and calculates brightness ratio coefficient as Consideration using the aging effects factor and characteristics of image and go forward side by side
Row brightness processed, low gray level subregion do not make brightness processed, and high grade grey level increases brightness processed dynamics, reduces to overall diagram
The destroying infection of image quality amount, height gray level mix subregion according to locating for the simple and complexity of image and the subregion
Position selection increases or reduces strength disposal, guarantees to adjust brightness of image under the premise of picture quality influences, OLED is delayed to fail,
Extend the OLED service life.
Above disclosed is only several preferred embodiments of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the present invention
Benefit requires made equivalent variations, still belongs to the scope covered by the invention.
Claims (9)
1. a kind of method for extending the display of organic electroluminescence service life characterized by comprising
Display screen is divided into multiple subregions；
The aging effects factor of each subregion is calculated, the aging effects factor is that the weighting of each subregion is flat
Equal level；
The brightness ratio of each subregion is calculated according to the characteristics of image of each subregion and the aging effects factor
Example coefficient；
The actual displayed brightness of the display screen is calculated according to the brightness ratio coefficient；
Image is exported according to the actual displayed brightness.
2. the method according to claim 1 for extending the display of organic electroluminescence service life, which is characterized in that according to each
The characteristics of image of the subregion and the aging effects factor calculate the brightness ratio coefficient of each subregion, comprising:
According to the described bright of the aging effects factor and the central pixel point of each subregion of described image feature calculation
Spend proportionality coefficient；
The brightness ratio coefficient of the rest of pixels point of each subregion is calculated by interpolation method.
3. the method according to claim 2 for extending the display of organic electroluminescence service life, which is characterized in that described to pass through
Interpolation method calculates the brightness ratio coefficient of the rest of pixels point of each subregion, comprising:
When calculating the brightness ratio coefficient for the rest of pixels point of edge subregion for being located at the display screen edge,
Extend outwardly from the edge subregion and extend subregion, and the central pixel point of the extension subregion is described bright
It is equal with the brightness ratio coefficient value of the central pixel point of the edge subregion to spend scalefactor value, passes through interpolation
Method calculates the brightness ratio coefficient of the rest of pixels point of each edge subregion.
4. the method according to claim 3 for extending the display of organic electroluminescence service life, which is characterized in that the basis
After the brightness ratio coefficient calculates the actual displayed brightness of the display screen, the method also includes:
Whether the picture quality for detecting the image shown according to the actual displayed brightness, which meets display, requires；
If meeting the display requirement, image is exported,
If being unsatisfactory for the display requirement, the brightness ratio coefficient of each subregion is recalculated.
5. the method according to claim 4 for extending the display of organic electroluminescence service life, which is characterized in that the detection
Whether the picture quality of the image shown according to the actual displayed brightness, which meets display, requires, comprising:
The Y-PSNR of the image shown according to the actual displayed brightness is calculated,
When the Y-PSNR is not less than Y-PSNR threshold value, image is exported,
When the Y-PSNR is less than the Y-PSNR threshold value, the brightness of each subregion is recalculated
Proportionality coefficient.
6. the method according to claim 4 for extending the display of organic electroluminescence service life, which is characterized in that the detection
Whether the picture quality of the image shown according to the actual displayed brightness, which meets display, requires, comprising:
The difference of the average brightness of original image and the average brightness of the actual displayed brightness is calculated,
When the difference is less than difference threshold, image is exported,
When the difference is not less than the difference threshold, the brightness ratio coefficient of each subregion is recalculated.
7. a kind of display equipment, which is characterized in that the display equipment includes sequence controller, and the sequence controller includes:
Zoning unit, for that will show that screen is divided into multiple subregions；
Computing unit, for calculating the aging effects factor of each subregion, the aging effects factor is each described
The weighted average levels of subregion, and calculated often according to the characteristics of image of each subregion and the aging effects factor
The brightness ratio coefficient of a subregion, and the actual displayed for showing screen is calculated according to the brightness ratio coefficient
Brightness.
8. display equipment according to claim 7, which is characterized in that the sequence controller further includes detection unit, is used
It is required in whether the picture quality for the image that detection is shown according to the actual displayed brightness meets display；
If meeting the display requirement, image is exported,
If being unsatisfactory for the display requirement, the brightness ratio coefficient of each subregion is recalculated.
9. display equipment according to claim 8, which is characterized in that the computing unit is also used to calculate according to the reality
The Y-PSNR for the image that border display brightness is shown, and average brightness and the actual displayed brightness of calculating original image
Average brightness difference.
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| KR102553092B1 (en) * | 2018-04-17 | 2023-07-10 | 삼성전자주식회사 | Electronic apparatus and controlling method thereof |
| KR20200120837A (en) * | 2019-04-12 | 2020-10-22 | 삼성디스플레이 주식회사 | Display device and method of driving the same |
| CN112149476B (en) * | 2019-06-28 | 2024-06-21 | 京东科技信息技术有限公司 | Target detection method, device, equipment and storage medium |
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