CN110310601A - Improve method, apparatus, computer and the medium of display brightness homogeneity - Google Patents
Improve method, apparatus, computer and the medium of display brightness homogeneity Download PDFInfo
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- CN110310601A CN110310601A CN201910628754.4A CN201910628754A CN110310601A CN 110310601 A CN110310601 A CN 110310601A CN 201910628754 A CN201910628754 A CN 201910628754A CN 110310601 A CN110310601 A CN 110310601A
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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]
- G09G3/3225—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] using an active matrix
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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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- 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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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Abstract
This application involves a kind of method, apparatus, computer and media for improving display brightness homogeneity, and first threshold and second threshold are chosen first in multistage grayscale, and first threshold is less than second threshold；Then the grayscale for being less than first threshold in multistage grayscale is divided into low ash rank area, the grayscale that second threshold is greater than in multistage grayscale is divided into high gray area；The grayscale in high gray area is compensated finally by voltage-drop compensation algorithm, voltage-drop compensation is more acurrate in the compensation of high gray.It is more acurrate to gray scale compensation by De-Mura backoff algorithm in low ash rank area.Therefore the present embodiment is by being divided into high gray area and low ash rank area for multistage grayscale, and voltage-drop compensation algorithm and De-Mura backoff algorithm progress gray scale compensation is respectively adopted, and can significantly improve the homogeneity that display panel is shown.
Description
Technical field
This application involves display fields, more particularly to method, apparatus, computer and Jie for improving display brightness homogeneity
Matter.
Background technique
Active matrix organic light-emitting diode (AMOLED) display panel has that visual angle is wide, the high and low power consumption of contrast and light
Many advantages, such as thin, be known as by industry be most development potentiality display device.With the development of AMOLED display technology,
The size of display panel is increasing, but display panel there is a problem of showing homogeneity difference.
Summary of the invention
Based on this, it is necessary to there is a problem of display brightness homogeneity difference for display panel, provide a kind of raising display
Method, apparatus, computer and the medium of brightness homogeneity.
A method of improving display brightness homogeneity, which comprises
First threshold and second threshold are chosen in multistage grayscale, the first threshold is less than the second threshold；
The grayscale for being less than the first threshold in the multistage grayscale is divided into low ash rank area, it will be in the multistage grayscale
Grayscale greater than the second threshold is divided into high gray area；
The grayscale in the high gray area is compensated by voltage-drop compensation algorithm；
The grayscale in low ash rank area is compensated by De-Mura backoff algorithm.
In one embodiment, the method also includes:
The first threshold will be greater than in the multistage grayscale and is divided into middle grayscale less than the grayscale of the second threshold
Area, by the voltage-drop compensation method and the De-Mura backoff algorithm to the gray scale compensation in the middle grayscale area.
In one embodiment, described to be greater than the first threshold in the multistage grayscale and be less than the second threshold
Grayscale be divided into middle grayscale area, by the voltage-drop compensation method and the De-Mura backoff algorithm to the middle grayscale area
In gray scale compensation include:
To the grayscale to be compensated in the middle grayscale area, penalty method is calculated by the voltage drop and obtains the first offset, is led to
It crosses the De-Mura backoff algorithm and obtains the second offset；
The first compensation system is obtained based on grayscale, the first threshold and the second threshold to be compensated in the middle grayscale area
Several and the second penalty coefficient, based on first penalty coefficient, second penalty coefficient, first offset and described the
Two offsets are to the gray scale compensation in the middle grayscale area.
In one embodiment, described based on grayscale to be compensated in the middle grayscale area, the first threshold and described the
Two threshold values obtain the first penalty coefficient and the second penalty coefficient, are based on first penalty coefficient, second penalty coefficient, institute
The first offset and second offset are stated in the gray scale compensation in the middle grayscale area,
The first compensation system is obtained based on grayscale, the first threshold and the second threshold to be compensated in the middle grayscale area
It is several to include: with the second penalty coefficient
Calculate the first penalty coefficient A=(GRAY-TH1)/(TH1-TH2), the second penalty coefficient B=(TH2-
GRAY)/(TH1-TH2)；
It is described to be mended based on first penalty coefficient, second penalty coefficient, first offset and described second
Repay value includes: to the gray scale compensation in the middle grayscale area
Calculate offset X=A × I+B × D of the grayscale in the middle grayscale area；
Wherein, GRAY represents grayscale to be compensated in the middle grayscale area, and TH1 represents the first threshold, described in TH2 is represented
Second threshold, I represent first offset, and D represents second offset.
In one embodiment, first threshold and second threshold, the first threshold are chosen in multistage grayscale described
After the second threshold, further includes:
0 grayscale is set by the first threshold, 0 grayscale is compensated by the voltage-drop compensation method；
The highest grayscale in the multistage grayscale is set by the second threshold, passes through the De-Mura backoff algorithm
The highest grayscale is compensated.
In one embodiment, the grayscale in the high gray area is compensated by voltage-drop compensation algorithm described
After include:
Color difference after being compensated by the voltage-drop compensation method to the grayscale in the high gray area is greater than preset value
When, the second threshold is adjusted in the multistage grayscale, until the grayscale color difference in the high gray area is no more than described pre-
If value.
In one embodiment, the grayscale in low ash rank area is mended by De-Mura backoff algorithm described
Include: after repaying
Color difference after being compensated by the De-Mura backoff algorithm to the grayscale in low ash rank area is greater than default
When value, the first threshold is adjusted in the multistage grayscale, until the grayscale color difference in low ash rank area is no more than described
Preset value.
A kind of display control unit, comprising:
Selecting module, for choosing first threshold and second threshold in the multistage grayscale that display module is shown, described the
One threshold value is less than the second threshold；
Division module will for the grayscale for being less than the first threshold in the multistage grayscale to be divided into low ash rank area
The grayscale for being greater than the second threshold in the multistage grayscale is divided into high gray area；
High gray area compensating module, for being mended by voltage-drop compensation algorithm to the grayscale in the high gray area
It repays；
Low ash rank compensating module, for being compensated by De-Mura backoff algorithm to the grayscale in low ash rank area.
A kind of computer equipment, including memory and processor are stored with and can be run on a processor on the memory
Computer program, the step of processor realizes the method when executing the computer program.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
The step of method is realized when row.
Method, apparatus, computer and the medium provided by the embodiments of the present application for improving display brightness homogeneity, first more
First threshold and second threshold are chosen in grade grayscale, the first threshold is less than the second threshold；Then by the multistage ash
Grayscale in rank less than the first threshold is divided into low ash rank area, and the ash of the second threshold will be greater than in the multistage grayscale
Rank is divided into high gray area；The grayscale in the high gray area is compensated finally by voltage-drop compensation algorithm, passes through De-
Mura backoff algorithm compensates the grayscale in low ash rank area.The data used when voltage-drop compensation algorithm measurement brightness
The usually data of high gray measurement, therefore the voltage-drop compensation is more acurrate in the compensation of high gray.Pass through in low ash rank area
Highest grayscale in the usually not more than described multistage grayscale of the gray scale compensation value that the De-Mura backoff algorithm obtains.Therefore
It is more acurrate to gray scale compensation by the De-Mura backoff algorithm in low ash rank area.Therefore the present embodiment is by by multistage grayscale
It is divided into the high gray area and low ash rank area, and the voltage-drop compensation algorithm and De-Mura benefit is respectively adopted
It repays algorithm and carries out gray scale compensation, the homogeneity that display panel is shown can be significantly improved.
Detailed description of the invention
Fig. 1 is the method flow diagram provided by the embodiments of the present application for improving display brightness homogeneity；
Fig. 2 is the computer equipment schematic diagram that this Shen embodiment provides.
Specific embodiment
In order to which the objects, technical solutions and advantages of the application are more clearly understood, by the following examples, and combine attached
Figure, is further elaborated method, apparatus, computer and the medium of the raising display brightness homogeneity of the application.It answers
Work as understanding, specific embodiment described herein only to explain the application, is not used to limit the application.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).In the description of the present application, it is to be understood that term " on ", "lower", "front", "rear", " left side ",
The orientation of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", " counterclockwise " or position are closed
System indicates to be based on the orientation or positional relationship shown in the drawings, being merely for convenience of description the application and simplifying description
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the application.
In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Applicants have found that the pixel-driving circuit with the increase of AMOLED size of display panels, in display panel
In the conducting wire that is connect with driver module it is also increasingly longer.Since the conducting wire has resistance, with the growth of conducting wire,
The conductor resistance also increases accordingly.Since the conducting wire is used to provide driving voltage for pixel, apart from the display mould
By different voltage and currents in the pixel of block different distance, therefore to will appear display brightness homogeneity poor for entire display panel
The problem of.The brightness homogeneity of display screen can be understood as the minimum collection point of brightness and brightness highest collection point in the display screen
Ratio.Ratio is bigger to illustrate that homogeneity is better, and ratio is smaller to illustrate that homogeneity is poorer.
In order to solve the problems, such as that the display panel display brightness homogeneity is poor, when driving display panel, usually to mentioning
The data voltage of supply pixel successively carries out voltage-drop compensation (IR Drop compensation) and De-mura compensation.Usual voltage-drop compensation
It is measured by optical brightness and surveys screen body luminance information, each pixel voltage offset is obtained by algorithm analysis, and then based on every
A pixel compensation voltage, offset burning is inside driving chip.De-mura compensation can be using high-resolution and high-precision
Picture of the CCD camera shooting display screen under some grayscale, then analyze pixel according to the data of camera acquisition
The feature of Luminance Distribution identifies brightness homogeneity problem according to related algorithm, then by De-mura backoff algorithm by changing
Become pixel drive voltage partially dark region is brightened, perhaps partially bright region it is dimmed or will have colour cast region eliminate, most
Whole target is so that panel different zones have the brightness being substantially the same.
However, the effect of voltage-drop compensation high gray promoted homogeneity effect it is obvious, and low ash rank compensation effect not
It is good.It is the data in high gray measurement that IR Drop backoff algorithm, which measures the data used when brightness, so IR Drop compensation exists
The compensation of high gray is more acurrate.The offset of low ash rank is usually what algorithm calculated, therefore not accurate enough.
And the De-mura backoff algorithm is used in high gray compensation calculation, the compensated ash that theoretical calculation obtains
Rank value can be more than the peak in multistage grayscale, and practical compensated grayscale value and can not be more than the described of the multistage grayscale
Peak, therefore the De-mura backoff algorithm is more preferable in the compensation effect of low ash rank.
Referring to Figure 1, the embodiment of the present application provides a kind of method for improving display brightness homogeneity, which comprises
S10, chooses first threshold and second threshold in multistage grayscale, and the first threshold is less than the second threshold；
The grayscale for being less than the first threshold in the multistage grayscale is divided into low ash rank area, by the multistage ash by S20
Grayscale in rank greater than the second threshold is divided into high gray area；
S30 compensates the grayscale in the high gray area by voltage-drop compensation algorithm；
S40 compensates the grayscale in low ash rank area by De-Mura backoff algorithm.
In the S10, display module can show different grayscale when showing.Grayscale can be by most secretly to most bright
The stratum level of different brightness.Grayscale level is more, and the picture effect that can be presented is also finer and smoother.Such as 8bit panel
With 256 grades of grayscale.The first threshold and the second threshold can be two grayscale different in multistage grayscale.At one
In embodiment, the first threshold can be 128 grayscale, and the second threshold can be 224 grayscale.
In the S20, the grayscale value in low ash rank area is relatively low, and brightness ratio is darker, in one embodiment, described
The grayscale in low ash rank area can be lower than 128.The grayscale in the high gray area can be higher than 224.
In the S30, before voltage-drop compensation algorithm calculates, the brightness of luminance meter measurement high gray can be first passed through.One
In a embodiment, can display panel 9 points of viewing area uniform design as brightness collection point, acquired by the brightness
The brightness data of point, can substantially represent the brightness data of the viewing area.In one embodiment, 255 grayscale are chosen, then
Brightness data acquisition sampling is carried out to the brightness collection point.Using the brightness data of the brightness collection point as analysis object,
By the voltage-drop compensation algorithm carry out that gray scale compensation value is calculated.The gray scale compensation value is burned onto display driver
In, and the display driver is restarted, compensation effect can be embodied.It is used when the voltage-drop compensation algorithm measurement brightness
Data are the data of high gray measurement, so the voltage-drop compensation is more acurrate in the compensation of high gray.
It, can be in the case where voltage-drop compensation be opened, using ccd image sensor in the low ash rank in the S40
Area acquires the brightness data of multiple grayscale.In one embodiment, can acquire 128 grayscale of red, green, blue pixel, 64 grayscale,
The brightness data of 32 grayscale.Then gray scale compensation value is calculated by De-Mura backoff algorithm, is finally burnt to the offset
Flash memory reservoir (FLASH).Then restart the display driver, the gray scale compensation value is loaded into from the flash memory reservoir
The random access memory (RAM) of display driver.The display panel can show compensation effect at this time.It is logical in low ash rank area
Cross the highest grayscale in the usually not more than described multistage grayscale of gray scale compensation value that the De-Mura backoff algorithm obtains.Cause
This is more acurrate to gray scale compensation by the De-Mura backoff algorithm in low ash rank area.
In the embodiment of the present application, first threshold is chosen first in multistage grayscale and second threshold, the first threshold are small
In the second threshold；Then the grayscale for being less than the first threshold in the multistage grayscale is divided into low ash rank area, by institute
It states the grayscale in multistage grayscale greater than the second threshold and is divided into high gray area；Finally by voltage-drop compensation algorithm to described
Grayscale in high gray area compensates, and is compensated by De-Mura backoff algorithm to the grayscale in low ash rank area.Electricity
The data used when voltage-drop compensation algorithm measurement brightness are usually the data of high gray measurement, therefore the voltage-drop compensation is in height
The compensation of grayscale is more acurrate.Will not usually it surpass in the gray scale compensation value that low ash rank area is obtained by the De-Mura backoff algorithm
Cross the highest grayscale in the multistage grayscale.Therefore low ash rank area by the De-Mura backoff algorithm to gray scale compensation more
Accurately.Therefore the present embodiment is by being divided into the high gray area and low ash rank area for multistage grayscale, and institute is respectively adopted
It states voltage-drop compensation algorithm and the De-Mura backoff algorithm carries out gray scale compensation, can significantly improve what display panel was shown
Homogeneity.
In one embodiment, the method also includes:
S50, the first threshold will be greater than in the multistage grayscale and is less than the grayscale of the second threshold be divided into
Grayscale area.By the voltage-drop compensation method and the De-Mura backoff algorithm to the gray scale compensation in the middle grayscale area.
In the present embodiment, the middle grayscale area can go the transition region between low ash rank area for the high gray,
Therefore the pixel in Shu Zhong grayscale area is compensated in conjunction with the voltage-drop compensation method and the De-Mura backoff algorithm,
High gray compensation can be suitable for using the De-Mura backoff algorithm simultaneously, the voltage-drop compensation method is suitable for low ash rank
The advantages of compensation, can be improved the homogeneity of display.
In one embodiment, the S50 includes:
S510 calculates penalty method by the voltage drop and obtains the first compensation to the grayscale to be compensated in the middle grayscale area
Value, obtains the second offset by the De-Mura backoff algorithm；
S520 obtains first based on grayscale, the first threshold and the second threshold to be compensated in the middle grayscale area
Penalty coefficient and the second penalty coefficient, based on first penalty coefficient, second penalty coefficient, first offset and
Second offset is to the gray scale compensation in the middle grayscale area.
In the S510, object of the grayscale to be mended as compensation can choose.And compensation is calculated using the voltage drop
Method and the De-Mura backoff algorithm compensate the grayscale to obtain first offset and second compensation respectively
Value.
In the S520, the benefit can be obtained by grayscale, the first threshold and the second threshold to be compensated
The relationship for repaying grayscale Yu the first threshold and the second threshold, can be obtained for react the grayscale to be compensated with it is described
The first penalty coefficient and second penalty coefficient of first threshold and the second threshold relationship.Pass through first compensation system
Several and second penalty coefficient can react first offset and second offset and mend to the grayscale to be compensated
The specific gravity repaid, it is thus possible to improve the accuracy of compensation.
In one embodiment, in the S520,
The first compensation system is obtained based on grayscale, the first threshold and the second threshold to be compensated in the middle grayscale area
It is several to include: with the second penalty coefficient
Calculate the first penalty coefficient A=(GRAY-TH1)/(TH1-TH2), the second penalty coefficient B=(TH2-
GRAY)/(TH1-TH2)；
It is described to be mended based on first penalty coefficient, second penalty coefficient, first offset and described second
Repay value includes: to the gray scale compensation in the middle grayscale area
Calculate offset X=A × I+B × D of the grayscale in the middle grayscale area；
Wherein, GRAY represents grayscale to be compensated in the middle grayscale area, and TH1 represents the first threshold, described in TH2 is represented
Second threshold, I represent first offset, and D represents second offset.
First penalty coefficient and second penalty coefficient have determined first offset and second compensation
It is worth to the specific gravity in the intermediate grayscale area compensation.
In one embodiment, after the S10, further includes:
The first threshold is set 0 grayscale by S11, is mended by the voltage-drop compensation method to 0 grayscale
It repays；
S12 sets the highest grayscale in the multistage grayscale for the second threshold, is compensated by the De-Mura
Algorithm compensates the highest grayscale.
In the S11, by setting 0 grayscale for the first threshold, the voltage-drop compensation method can be grey to being greater than 0
The grayscale of rank compensates, thus can ensure that the voltage-drop compensation method can compensate all multistage grayscale.
In the S12, by the highest grayscale set the second threshold in the multistage grayscale, thus ensuring that
The De-Mura backoff algorithm compensates all multistage grayscale.
Therefore, when testing to compensation effect, described first can flexibly be replaced in entire multistage grayscale section
Threshold value and the second threshold.After finding the most suitable first threshold and the second threshold, then determines use respectively
Which kind of algorithm, which corresponds to which section, compensates.
In one embodiment, it after being compensated in the ban using voltage-drop compensation method, reuses the De-Mura compensation and calculates
It the use of the De-Mura backoff algorithm is compensated on the basis of after voltage-drop compensation method compensates when method compensates.Therefore
The brightness that display panel is shown can be two kinds of compensation method interaction compensation.
In one embodiment, include: after the S30
S31, the color difference after being compensated by the voltage-drop compensation method to the grayscale in the high gray area are greater than pre-
If when value, adjusting the second threshold in the multistage grayscale.Until the grayscale color difference in the high gray area is not more than institute
State preset value.When color difference in the high gray area is larger, color difference can be reduced by reducing the second threshold.Pass through adjusting
The range in the adjustable high gray area of second threshold, thus can change the ash by the voltage-drop compensation algorithm compensation
Order range.It, can will the second threshold at this time when the grayscale color difference in the high gray area is less than or equal to the preset value
As the final second threshold.The preset value can be 20%, the i.e. grayscale in the high gray area, the display
The minimum brightness of pixel and the difference of maximum brightness and the ratio of the maximum brightness are not more than 20% in panel.
In one embodiment, include: after the S40
S41, the color difference after being compensated by the De-Mura backoff algorithm to the grayscale in low ash rank area are greater than
When preset value, the first threshold is adjusted in the multistage grayscale, until the grayscale color difference in low ash rank area is not more than
The preset value.When color difference in low ash rank area is larger, color difference can be reduced by increasing the first threshold.Pass through
Adjust the range in the first threshold adjustable low ash rank area.It thus can change and mended by the De-Mura backoff algorithm
The grey-scale range repaid.It, can will described at this time the when the grayscale color difference in low ash rank area is less than or equal to the preset value
One threshold value is as the final first threshold.The preset value can be 20%, the i.e. grayscale in low ash rank area, institute
It states the minimum brightness of pixel and the difference of maximum brightness and the ratio of the maximum brightness in display panel and is not more than 20%.
The embodiment of the present application also provides a kind of display control unit, and the display control unit includes:
Selecting module, for choosing first threshold and second threshold in the multistage grayscale that display module is shown, described the
One threshold value is less than the second threshold；
Division module will for the grayscale for being less than the first threshold in the multistage grayscale to be divided into low ash rank area
The grayscale for being greater than the second threshold in the multistage grayscale is divided into high gray area；
High gray area compensating module, for being mended by voltage-drop compensation algorithm to the grayscale in the high gray area
It repays；
Low ash rank compensating module, for being compensated by De-Mura backoff algorithm to the grayscale in low ash rank area.
Specific limit about the display control unit may refer to above for raising display brightness homogeneity
The restriction of method, details are not described herein.Modules in above-mentioned display control unit can be fully or partially through software, hardware
And combinations thereof realize.Above-mentioned each module can be embedded in the form of hardware or independently of in the processor in computer equipment,
It can be stored in a software form in the memory in computer equipment, execute the above modules pair in order to which processor calls
The operation answered.
The embodiment of the present application also provides a kind of computer equipment 10.The computer equipment includes memory 300 and processing
Device 100 is stored with the computer program that can be run on processor 100 on the memory 300.The processor 100 executes
The step of method of the raising display brightness homogeneity provided by the above embodiment is realized when the computer program.
The data used when voltage-drop compensation algorithm measurement brightness are usually the data of high gray measurement, therefore the voltage
Drop compensation is more acurrate in the compensation of high gray.In the gray scale compensation value that low ash rank area is obtained by the De-Mura backoff algorithm
Highest grayscale in the usually not more than described multistage grayscale.Therefore pass through the De-Mura backoff algorithm pair in low ash rank area
Gray scale compensation is more acurrate.Therefore the computer program in the computer equipment 10 is by being divided into the high ash for multistage grayscale
Rank area and low ash rank area, and the voltage-drop compensation algorithm and De-Mura backoff algorithm progress grayscale is respectively adopted
Compensation, can significantly improve the homogeneity that display panel is shown.
The computer equipment 10 can be terminal, and internal structure chart can be as shown in Figure 2.The computer equipment 10
Including the processor 100, memory, network interface 400 connected by system bus.Wherein, the place of the computer equipment 10
Device 100 is managed for providing calculating and control ability.The memory 300 of the computer equipment 10 includes non-volatile memory medium
200, built-in storage 300.The non-volatile memory medium 200 is stored with operating system and computer program.The interior storage
Device 30 provides environment for the operation of operating system and computer program in non-volatile memory medium.The computer equipment 10
Network interface 400 be used to communicate with external terminal by network connection.The computer program is held by the processor 200
To realize the method for improving display brightness homogeneity when row.
The embodiment of the present application also provides a kind of computer readable storage medium.The computer-readable recording medium storage has
Computer program.The computer program realizes raising display brightness homogeneity described in above-described embodiment when being executed by processor
Method the step of.Running the program can achieve the purpose that significantly improve the homogeneity that display panel is shown.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein,
To any reference of memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation of this patent range therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from the application design, various modifications and improvements can be made, these belong to the protection scope of the application.
Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of method for improving display brightness homogeneity, which is characterized in that the described method includes:
First threshold and second threshold are chosen in multistage grayscale, the first threshold is less than the second threshold；
The grayscale for being less than the first threshold in the multistage grayscale is divided into low ash rank area, will be greater than in the multistage grayscale
The grayscale of the second threshold is divided into high gray area；
The grayscale in the high gray area is compensated by voltage-drop compensation algorithm；
The grayscale in low ash rank area is compensated by De-Mura backoff algorithm.
2. a kind of method for improving display brightness homogeneity as described in claim 1, which is characterized in that the method is also wrapped
It includes:
The first threshold will be greater than in the multistage grayscale and be divided into middle grayscale area less than the grayscale of the second threshold, led to
The voltage-drop compensation method and the De-Mura backoff algorithm are crossed to the gray scale compensation in the middle grayscale area.
3. improving the method for display brightness homogeneity as claimed in claim 2, which is characterized in that described by the multistage grayscale
In be greater than the first threshold and be less than the second threshold grayscale be divided into middle grayscale area, pass through the voltage-drop compensation method
Include: to the gray scale compensation in the middle grayscale area with the De-Mura backoff algorithm
To the grayscale to be compensated in the middle grayscale area, penalty method is calculated by the voltage drop and obtains the first offset, passes through institute
It states De-Mura backoff algorithm and obtains the second offset；
Based on grayscale, the first threshold and the second threshold to be compensated in the middle grayscale area obtain the first penalty coefficient and
Second penalty coefficient is mended based on first penalty coefficient, second penalty coefficient, first offset and described second
Value is repaid to the gray scale compensation in the middle grayscale area.
4. improving the method for display brightness homogeneity as claimed in claim 3, which is characterized in that described to be based on the middle grayscale
Grayscale, the first threshold and the second threshold to be compensated obtain the first penalty coefficient and the second penalty coefficient in area, are based on
First penalty coefficient, second penalty coefficient, first offset and second offset are to the middle grayscale
In gray scale compensation in area,
Based on grayscale, the first threshold and the second threshold to be compensated in the middle grayscale area obtain the first penalty coefficient and
Second penalty coefficient includes:
Calculate the first penalty coefficient A=(GRAY-TH1)/(TH1-TH2), the second penalty coefficient B=(TH2-
GRAY)/(TH1-TH2)；
It is described to be based on first penalty coefficient, second penalty coefficient, first offset and second offset
Include: to the gray scale compensation in the middle grayscale area
Calculate offset X=A × I+B × D of the grayscale in the middle grayscale area；
Wherein, GRAY represents grayscale to be compensated in the middle grayscale area, and TH1 represents the first threshold, and TH2 represents described second
Threshold value, I represent first offset, and D represents second offset.
5. improving the method for display brightness homogeneity as described in claim 1, which is characterized in that described in multistage grayscale
First threshold and second threshold are chosen, the first threshold is less than after the second threshold, further includes:
0 grayscale is set by the first threshold, 0 grayscale is compensated by the voltage-drop compensation method；
The highest grayscale in the multistage grayscale is set by the second threshold, by the De-Mura backoff algorithm to institute
Highest grayscale is stated to compensate.
6. improving the method for display brightness homogeneity as claimed in claim 5, which is characterized in that mended described by voltage drop
It repays after algorithm compensates the grayscale in the high gray area and includes:
When color difference after being compensated by the voltage-drop compensation method to the grayscale in the high gray area is greater than preset value,
The second threshold is adjusted in the multistage grayscale, until the grayscale color difference in the high gray area is not more than the preset value.
7. improving the method for display brightness homogeneity as claimed in claim 5, which is characterized in that pass through De-Mura described
Backoff algorithm includes: after compensating to the grayscale in low ash rank area
Color difference after being compensated by the De-Mura backoff algorithm to the grayscale in low ash rank area is greater than preset value
When, the first threshold is adjusted in the multistage grayscale, until the grayscale color difference in low ash rank area is no more than described pre-
If value.
8. a kind of display control unit characterized by comprising
Selecting module, for choosing first threshold and second threshold, first threshold in the multistage grayscale that display module is shown
Value is less than the second threshold；
Division module will be described for the grayscale for being less than the first threshold in the multistage grayscale to be divided into low ash rank area
Grayscale in multistage grayscale greater than the second threshold is divided into high gray area；
High gray area compensating module, for being compensated by voltage-drop compensation algorithm to the grayscale in the high gray area；
Low ash rank compensating module, for being compensated by De-Mura backoff algorithm to the grayscale in low ash rank area.
9. a kind of computer equipment, including memory and processor, be stored on the memory to run on a processor
Computer program, which is characterized in that the processor realizes any one of claims 1 to 7 when executing the computer program
The step of the method.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of method described in any one of claims 1 to 7 is realized when being executed by processor.
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