CN109658864A - A kind of display panel display processing method and display processing unit - Google Patents
A kind of display panel display processing method and display processing unit Download PDFInfo
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- CN109658864A CN109658864A CN201811610217.9A CN201811610217A CN109658864A CN 109658864 A CN109658864 A CN 109658864A CN 201811610217 A CN201811610217 A CN 201811610217A CN 109658864 A CN109658864 A CN 109658864A
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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
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The embodiment of the present application provides a kind of display panel, records the display voltage and display brightness of each sub-pixel；The display voltage and brightness relationship curve of each sub-pixel are generated according to the multiple display voltage, and calculates the relation curve of the display voltage and average brightness；The relation curve of each sub-pixel is mapped to the relation curve of the display voltage and average brightness by coefficient of correspondence；By the relation curve storage of the coefficient of correspondence of each sub-pixel and the display voltage and average brightness to driving chip；Display data are sent into driving chip, are transferred to display panel after calling the relation curve of the coefficient of correspondence and the display voltage and average brightness and processing.The application can eliminate the mura of each grayscale, can improve image display effect under low-light level and high brightness mode.
Description
[technical field]
The present invention relates to field of display technology more particularly to a kind of display panel display processing methods and display processing dress
It sets.
[background technique]
With the tremendous development of display technology, requirement of the consumer to the display effect of display equipment is higher and higher.Consumption
The display that person can not receive display panel is bad, such as: mura (moire).It solves to show that undesirable method mainly has three at present
Kind: 1, the compensation way of TFT circuit generally requires to design more complex pixel circuit to realize to the threshold deviation of TFT pipe
Compensation, complicated circuit structure increases the difficulty realized in technique, limits the area of light emitting region, thus just cannot achieve
High PPI；2, external voltage and current compensation, it is necessary to design the circuit of periphery to monitor the voltage or electric current of pixel, and need
Panel itself gives cooperation, pulls out and is unfavorable for accomplishing narrow side this adds increased the complexity of circuit for monitoring the signal used
Frame；3, existing optical compensation scheme is all based on grayscale to adjust the non-uniform light between pixel, and grayscale is for driving core
It is an opposite concept for piece (Driver IC) and OLED display, dependent on set by gamma (gamma) curve
Grayscale, voltage, brightness three relationship, grayscale is become to drive OLED by Driver IC by pre-set voltage value
Display device shines, though the adjustment of brightness irregularities between pixel can be completed, when gamma changes, such as display device
Using hi-bright mode, battery saving mode etc., the accuracy that mura is eliminated cannot also ensure that limitation is larger.In addition, existing
The coefficient of optical compensation scheme storage is all the parameter to be corrected, because the correction parameter of different grayscale is different, without one
A storage chip (flash IC) can all store the correction parameter of 0-255 grayscale, therefore usually way is that storage is special
Fixed several gray scale correction parameters, remaining grayscale show that the coefficient accuracy that often this method obtains is not high with interpolation calculation,
Final compensation effect also has deviation.
[summary of the invention]
In view of this, the embodiment of the invention provides a kind of processing method of display panel and processing units, to solve
Above-mentioned technical problem.
On the one hand, the application discloses a kind of display processing method of display panel, provides multiple display voltages and shows to described
Show panel；Record the display voltage and display brightness of each sub-pixel；Each sub-pixel is generated according to the multiple display voltage
Display voltage and brightness relationship curve, and calculate it is described display voltage and average brightness relation curve；By each sub- picture
The relation curve of element is mapped to the relation curve of the display voltage and average brightness by coefficient of correspondence；By each son
The relation curve of the coefficient of correspondence of pixel and the display voltage and average brightness is stored to driving chip；Display data are sent into
Driving chip is transferred to display after calling the relation curve of the coefficient of correspondence and the display voltage and average brightness and processing
Panel.
In one embodiment of the application, the display panel shows that grey-scale range is 0~n grayscale, according to described more
A display voltage generates the display voltage and brightness relationship curve of each sub-pixel, and calculates the display voltage and be averaged bright
The relation curve of degree specifically includes: the display voltage and brightness relationship of each sub-pixel are generated according at least k gray scale voltage
Curve, wherein k is the maximum positive integer less than or equal to 0.3* (n+1)；It include a gray scale voltage in 0~n/3 grayscale；N/3~
It include b gray scale voltage in 2n/3 grayscale；It include c gray scale voltage in 2n/3~n grayscale；A is the maximum less than or equal to 0.45k
Positive integer；B is the maximum positive integer less than or equal to 0.3k；C=k-a-b.And calculate the display voltage and average brightness
Relation curve；The average brightness is the average value of brightness of each sub-pixel under corresponding display voltage.
In one embodiment of the application, the display panel shows that grey-scale range is 0~n grayscale, according to described more
A display voltage generates the display voltage and brightness relationship curve of each sub-pixel, and calculates the display voltage and be averaged bright
The relation curve of degree specifically includes: generating the display voltage of each sub-pixel according at least n+1 gray scale voltage and brightness is closed
It is curve, and calculates the relation curve of the display voltage and average brightness；The average brightness is each sub-pixel right
It should show the average value of the brightness under voltage.
In one embodiment of the application, each sub-pixel is numbered；The display of each sub-pixel
Voltage and the relation curve of brightness are Ln=fn(vi), wherein n indicates the number of the sub-pixel, and the i indicates corresponding grayscale
Voltage；The display voltage of each sub-pixel and the relation curve of the average brightness are Lmean=fmean(vi), wherein
Mean indicates that the average value of each sub-pixel, i indicate grayscale.
In one embodiment of the application, the relation curve is multinomial, logarithmic function, exponential function, triangle letter
One of number or the combination concentrated.
In one embodiment of the application, the relation curve by each sub-pixel is reflected by coefficient of correspondence
The relation curve for being mapped to the display voltage and average brightness specifically includes: by coefficient of correspondence knBy the display of the sub-pixel
The corresponding relationship f of voltage and brightnessn(vi) it is mapped as f (kn, fmean(vi))。
In one embodiment of the application, fn(vi)=an*vi+bn, fmean(vi)=amean*vi+bmean；It is described will be each
The relation curve of the sub-pixel has by the relation curve that coefficient of correspondence is mapped to the display voltage and average brightness
Body includes: by coefficient of correspondence anAnd bnBy the fn(vi) it is mapped as f (an, bn, fmean(vi))。
In one embodiment of the application, pass through coefficient of correspondence coefficient of correspondence anAnd bnBy the grayscale electricity of the sub-pixel
Pressure v is mapped as (amean*v+bmean-bn)/an。
It is described by the coefficient of correspondence of each sub-pixel and display voltage peace in one embodiment of the application
The relation curve storage of equal brightness is specifically included to driving chip: by the coefficient of correspondence knWith display voltage and average brightness
Relation curve fmean(vi) store and arrive driving chip.
In one embodiment of the application, the display voltage for recording each sub-pixel and display brightness are specifically included:
The corresponding display brightness of the sub-pixel is recorded with optical capturing equipment when providing each display voltage.
On the other hand, the application provides a kind of 1 display processing unit of display panel, comprising: grayscale provides unit: described
Grayscale provides unit for providing multiple display voltages to the display panel；Recording unit: the recording unit is for recording
The display voltage and display brightness of each sub-pixel；Generation unit: the generation unit is used for raw according to the multiple display voltage
At the display voltage and brightness relationship curve of each sub-pixel, and the relationship for calculating the display voltage and average brightness is bent
Line；Map unit: the relation curve of each sub-pixel is mapped to the display voltage by coefficient of correspondence and is averaged
The relation curve of brightness；Storage unit: the storage unit is used for the coefficient of correspondence of each sub-pixel and display electricity
The relation curve of pressure and average brightness is stored to driving chip；Driving unit: the driving unit will be for that will show that data are sent into
Driving chip is transferred to display after calling the relation curve of the coefficient of correspondence and the display voltage and average brightness and processing
Panel.
The application generates display voltage by recording the relation curve of the display voltage and display brightness of each sub-pixel
With the relationship of average brightness.And the relation curve of each sub-pixel is mapped to display county administration and average brightness by coefficient of correspondence
Relationship.It finally calls coefficient and shows the relation curve of voltage and average brightness.The processing method of the display panel of the application is straight
It connects and connects display voltage and brightness.The mura that each grayscale can be eliminated may be used under low-light level and high brightness mode
To improve image display effect.And amount of storage is small, and the resource for occupying IC is few, greatly improves the feasibility of scheme.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the schematic diagram of the display panel processing method of the application one embodiment；
The relation curve schematic diagram of the display voltage and brightness of Fig. 2 the application one embodiment；
Fig. 3 is the schematic diagram of one embodiment storage coefficient of correspondence of the application；
Fig. 4 is the schematic diagram of the default display voltage and actual displayed voltage corresponding relationship of one embodiment of the application；
Fig. 5 is the schematic diagram of the display panel processing unit of one embodiment of the application；
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Existing optical compensation scheme is all based on grayscale to adjust the non-uniform light between pixel, and grayscale is for driving
It is an opposite concept for chip (Driver IC) and OLED display, dependent on set by gamma (gamma) curve
Grayscale, voltage, brightness three relationship, grayscale is become to drive by Driver IC by pre-set voltage value
OLED display shines, though the adjustment of brightness irregularities between pixel can be completed, when gamma changes, for example shows
Using hi-bright mode, battery saving mode, Night etc., the accuracy that mura is eliminated cannot also ensure that device, limitation compared with
Greatly.In addition, the coefficient of existing optical compensation scheme storage is all the parameter to be corrected, because the correction parameter of different grayscale is
Different, none storage chip (flash IC) can all store the correction parameter of 0-255 grayscale, therefore usually
Way is to store specific several gray scale correction parameters, remaining grayscale show that often this method obtained is with interpolation calculation
Number accuracy is not high, and final compensation effect also has deviation.
The application provides a kind of display processing method of display panel, can eliminate mura, and the data volume of storage is few, and
Suitable for various display patterns.Image display effect can be improved under high brightness and low-luminance mode.
Referring to FIG. 1, Fig. 1 is the schematic diagram for the display panel processing method that Fig. 1 is the application one embodiment；
The display processing method of display panel provided in this embodiment includes:
S1: multiple display voltages are provided to the display panel；The data voltage that display voltage said herein refers to.OLED
Display panel is usually electric current driving.Driving current Ids=k (PVDD-Vdata)2, wherein Ids refers to driving current；PVDD is
Refer to supply voltage；Vdata refers to display voltage.When entire display panel is displayed in white, each sub-pixel inputs phase
Same gray scale voltage, theoretically brightness should be equal, shows uniform white.But due to each sub-pixel driving circuit
The difference of driving transistor technology parameter will cause k value difference, and driving current is also different.On the other hand, due to each OLED device
There may be differences to ultimately cause display brightness difference during the preparation process for part.This has resulted in showing uneven (mura).Therefore,
The application needs to test the relationship of display voltage and actual displayed brightness, avoids theoretical calculation bring error.
S2: the display voltage and display brightness of each sub-pixel are recorded；Record the display voltage and display brightness of each sub-pixel
It specifically includes: recording the corresponding display brightness of the sub-pixel with optical capturing equipment when providing each display voltage.Example
Such as: display voltage is inputted to display panel using external equipment, acquires the brightness of each sub-pixel using CCD camera at the same time,
And it is stored.The application directly provides display voltage to display panel, records the display voltage of each sub-pixel and shows bright
Degree.Directly display voltage and intrinsic brilliance are connected.Rather than grayscale and brightness, prior art dependence is avoided in this way
In grayscale, voltage.The relationship of brightness three, in luminance fluctuation caused by compensate inaccuracy problem.Such as: in Night
Lower maximum brightness is set in 25nit, that is, in 8bit display panel, and the brightness of 255 grayscale will not exceed 25nit.And
It is highlighted under mode outdoors, maximum brightness may need 500nit.So actually high brightness mode and low-light level mould
The corresponding offset of formula is different.It will appear compensation inaccuracy if when compensating according to grayscale in the prior art
Situation.Correction parameter is needed if making up such case.But each grayscale requires to be corrected, and requires correction ginseng
Number, and each grayscale may correspond to different luminance patterns and require different correction parameters.Existing storage chip can not
The so more correction parameter of storage, and use difference arithmetic.But still devious after the compensation ask can be equally deposited in this way
Topic.And the application directly connects display voltage and brightness, avoids the relationship with grayscale, so that it may avoid above-mentioned ask
Topic.
S3: the display voltage and brightness relationship curve of each sub-pixel are generated according to the multiple display voltage, and counted
Calculate the relation curve of the display voltage and average brightness；
S4: the relation curve of each sub-pixel is mapped to the display voltage by coefficient of correspondence and is averaged bright
The relation curve of degree；
S5: by the relation curve storage of the coefficient of correspondence of each sub-pixel and the display voltage and average brightness to drive
Dynamic chip；The sub-pixel quantity of display panel is million ranks, and storage chip can not store the relation curve of each sub-pixel.
Such as: by taking the display panel of 1920*1080 resolution ratio as an example, have 1920*1080*2=4147200 sub-pixel.Each
Relation curve occupancy byte is relatively more, and existing storage chip can not store 4,000,000 relation curves, and call relation is bent
The calculating process of line also can be slower, bigger to the consumption of resources of chip.The application generates the pass of display line voltage and average brightness
It is curve, and the relationship that the relation curve of each sub-pixel is mapped to display voltage and average brightness by coefficient of correspondence is bent
Line.It only needs to store the coefficient of correspondence of each sub-pixel and the homologous thread of display voltage and average brightness, substantially reduces occupancy
The space of storage chip.
S6: display data are sent into driving chip, call the coefficient of correspondence and the display voltage and average brightness
Display panel is transferred to after relation curve and processing.The present embodiment only has invoked the coefficient of correspondence and display voltage of each sub-pixel
With the relation curve of average brightness, compared to the display voltage and brightness that call each sub-pixel relation curve it is also possible that
Call speed faster, reflection to macroscopic view is exactly that processing speed is wider, and display delay is lower.
Further, which shows that grey-scale range is 0~n grayscale, generates display voltage and brightness relationship curve
It may include the gray scale voltage of wherein all grayscale, may also be included in which the gray scale voltage of part gray-scale.It is all when utilizing
Gray scale voltage and brightness production Methods curve then formation curve needs to occupy longer time, cause the reduction of efficiency.As before
Face is illustrated, and has 4147200 sub-pixels to need to generate the relation curve of display voltage and brightness in panel.If each sub-pixel
The time 1ms of production Methods curve, then total generation time increases 1.15h, this will be greatly reduced efficiency.Song is generated in order to be promoted
The efficiency of line generates the display voltage and brightness relationship curve of each sub-pixel according to the multiple display voltage, and calculates
The relation curve of the display voltage and average brightness specifically includes:
The display voltage and brightness relationship curve of each sub-pixel are generated according at least k gray scale voltage, wherein k is small
In the maximum positive integer for being equal to 0.3* (n+1)；It include a gray scale voltage in 0~n/3 grayscale；Include in n/3~2n/3 grayscale
B gray scale voltage；It include c gray scale voltage in 2n/3~n grayscale；A is the maximum positive integer less than or equal to 0.45k；B is small
In the maximum positive integer for being equal to 0.3k；C=k-a-b.
And calculate the relation curve of the display voltage and average brightness；The average brightness is each sub-pixel right
It should show the average value of the brightness under voltage.It should be noted that gray scale voltage refers to display voltage corresponding with the grayscale.Example
As gray scale voltage 3.2v refers to that the corresponding display voltage of 255 grayscale is 3.2v.
Since the corresponding brightness of the gray scale voltage of low ash rank is relatively low, influence of the fluctuation of brightness for corresponding relationship compared with
Greatly, therefore, low ash rank needs to generate relation curve according to more low ash rank gray scale voltages and brightness.Such as: 10 grayscale are corresponding
30nit, 200 grayscale correspond to 300nit, then are equally that the fluctuation of 10 grayscale of luminance deviation of 3nit is up to 10%, and 200 grayscale
Only 1%.Therefore, show that voltage and brightness relationship curve can not increase total amount of data according to data under more low ash ranks
In the case of promoted obtain display voltage and brightness relationship curve precision.
Such as: the relation curve of the display voltage and brightness of each sub-pixel is generated according to 10 gray scale voltages.In 0~85 ash
Rank grayscale selects 5 gray scale voltages as display voltage and records its display brightness；3 grayscale electricity are selected in 86~170 grayscale
Pressure is as display voltage and records its display brightness；2 gray scale voltages are selected as display grayscale in 171~255 grayscale and are remembered
Record its display brightness.Record 10 display voltages and corresponding display brightness in total in this way.Do not increasing the number of record point
Under the premise of considerably increase to obtain the precision of display voltage and brightness relationship curve, improve the precision of display processing.
In another embodiment of the application, which shows that grey-scale range is 0~n grayscale, according to described more
A display voltage generates the display voltage and brightness relationship curve of each sub-pixel, and calculates the display voltage and be averaged bright
The relation curve of degree specifically includes: generating the display voltage of each sub-pixel according at least n+1 gray scale voltage and brightness is closed
It is curve, and calculates the relation curve of the display voltage and average brightness；The average brightness is each sub-pixel right
It should show the average value of the brightness under voltage.
Unlike upper one embodiment, since the present embodiment is directed to different customer demands, selection is not according to
The gray scale voltage of same grayscale shows the relation curve of voltage and brightness to generate.It is right different from the client of the general consumer goods
For the professional client of image and video display, the efficiency area that can sacrifice cost and volume production exchanges the accuracy for showing color for.Cause
This, can be by the gray scale voltage of all 0~n grayscale all as display voltage, and records corresponding display under each display voltage
Brightness obtains the relation curve of the display voltage and brightness of each sub-pixel, and the curve obtained in this way will be more accurate, so that aobvious
Show that the compensation of panel is more accurate.
In another embodiment of the application,
Each sub-pixel of display panel is numbered；
The display voltage of each sub-pixel and the relation curve of brightness are Ln=fn(vi), wherein n indicates the volume of the sub-pixel
Number, the i indicates corresponding gray scale voltage；
The display voltage of each sub-pixel and the relation curve of the average brightness are Lmean=fmean(vi), wherein mean table
Show that the average value of each sub-pixel, the i indicate corresponding gray scale voltage；Due to being input to the display electricity of each sub-pixel
Pressure is all identical, therefore average brightness corresponding for each display voltage is exactly the brightness under the display voltage of each sub-pixel
Average value after summation, the relationship that then can be obtained by display voltage and average brightness according to average value and display voltage are bent
Line.
The display panel includes at least the sub-pixel of three kinds of different colours, the display voltage and the average brightness
Relation curve includes at least three；The sub-pixel of different colours corresponds to the relation curve of different display voltage and average brightness.
Display panel generally at least needs to include that the sub-pixels of tri- kinds of colors of R, G, B is just able to achieve full-color display.Due to different colours
The brightness of sub-pixel and the corresponding relationship of gray scale voltage are different, and the same brightness for showing blue subpixels under voltage will be lower than red
The step value of the brightness of sub-pixels, gray scale voltage and brightness between each grayscale is also different, therefore by the sub- picture of different colours
It is accurate that the display voltage of element from the relation curve of average brightness is set as the different colors for being conducive to be promoted each color sub-pixels
Degree.
It is bent in the relationship of the display voltage and brightness relationship curve and display voltage and average brightness that have obtained each sub-pixel
The relationship for just needing the relation curve of each sub-pixel being mapped to display voltage and average brightness by coefficient of correspondence after line is bent
Line.It is the schematic diagram of one embodiment storage coefficient of correspondence of the application please continue to refer to Fig. 3 and Fig. 4, Fig. 3；Fig. 4 is the application
The default display voltage and actual displayed voltage corresponding relationship of one embodiment schematic diagram；
The relation curve by each sub-pixel is mapped to the display voltage by coefficient of correspondence and is averaged
The relation curve of brightness specifically includes:
Pass through coefficient of correspondence knBy the corresponding relationship f of the display voltage and brightness of the sub-pixeln(vi) it is mapped as f (kn,
fmean(vi)), wherein fmean(vi) indicate to show the relation curve of voltage and average brightness.Mapping mentioned here refers to can be with
By the way that for any one sub-pixel, arbitrary gray scale voltage vi is bent by the relationship of display voltage and average brightness
Line fmean(vi) and coefficient of correspondence knShow that the sub-pixel is shown to actual displayed voltage required for average brightness.
Optionally, relation curve is one of multinomial, logarithmic function, exponential function, trigonometric function or concentrates
Combination.
Below by taking an order polynomial as an example, the display voltage of sub-pixel and the relation curve of brightness are fn(vi)=an*vi+
bn, fmean(vi)=amean*vi+bmean；
The relation curve by each sub-pixel is mapped to the display voltage by coefficient of correspondence and is averaged
The relation curve of brightness specifically includes:
Pass through coefficient of correspondence aiAnd biBy the fn(vi) it is mapped as f (an, bn, fmean(vi))。
Mapping mentioned here is referred to through coefficient of correspondence aiAnd biAnd show that the relationship of grayscale and average brightness is bent
Line fmean(vi) the display voltage of grayscale to be shown is mapped as actual displayed voltage.
Specifically, when the relation curve of display voltage and average brightness is fmean(vi)=amean*vi+bmeanWhen, by right
Answer coefficient coefficient of correspondence aiAnd biThe display voltage v of the target gray scale of the sub-pixel is mapped as actual displayed voltage (amean*v
+bmean-bn)/an。
Fig. 3 and Fig. 4 are please referred to, by the coefficient of correspondence k of a sub-pixelgh, wherein g indicates that row, h indicate column, each sub-pixel
Coefficient of correspondence kghIncluding agh, bghWith the corresponding relationship f of display voltage and average brightnessmean(vi) store and arrive storage chip.And
And by the display voltage v of target gray scaleghIt is mapped as actual displayed voltage vgh'.By taking above-mentioned linear function as an example, vgh'=
(amean*vgh+bmean-bn)/an。
Further, the relation curve of the coefficient of correspondence of each sub-pixel and the display voltage and average brightness is deposited
It stores up driving chip to specifically include: by the coefficient of correspondence knWith the relation curve f of display voltage and average brightnessmean(vi) deposit
Store up driving chip.
In another embodiment of the application, referring to FIG. 2, the display voltage of Fig. 2 the application one embodiment and bright
The relation curve schematic diagram of degree；
The display voltage of sub-pixel and the relation curve of average brightness are fitted to quadratic function.
What the present embodiment was selected is 31,63,95,128,224 and 255 grayscale, and the display voltage of these grayscale is defeated
Enter display panel.By taking red sub-pixel as an example,
Firstly, the selected each sub-pixel of grayscale of the present embodiment institute is lighted using identical Vdata, gray scale voltage matrix is denoted as v,
V [V_R31 V_R63 V_R95 V_R128 V_R224 V_R255]=[5.2207 4.9323 4.6440 4.3466
3.4816 3.2022]
Record the display voltage and display brightness of each sub-pixel；CCD takes pictures to obtain the brightness for corresponding to each sub-pixel, record
Each pixel difference gray-scale intensity collection, such as the R pixel of 1 row 1 column:
L=[L_R31 (1,1) L_R63 (1,1) L_R95 (1,1) L_R128 (1,1) L_R224 (1,1) L_R255
(1,1)]=[4.3080 16.8144 43.4010 85.4760 273.0870 305.0100]
Calculate each grayscale all pixels average brightness:
Lmean=[L_meanR31 L_meanR63 L_meanR95 L_meanR128 L_meanR224 L_
MeanR255]=[5.9505 22.6143 55.3383 105.7620 400.7970 544.5198]
Following table is obtained according to data above
The display voltage and brightness relationship curve of each sub-pixel are generated according to the multiple display voltage, and calculates institute
State the relation curve of display voltage and average brightness；(1,1) sub-pixel voltage brightness relationship curve: f (1,1) is generated using L and v
=48.28*v^2-566*v+1637.Target voltage brightness relationship curve: f is generated using Lmean and vmean=131.3*v^2-
1370*v+3582。
The relation curve of each sub-pixel is mapped to the display voltage and average brightness by coefficient of correspondence
Relation curve；(1,1) coefficient of correspondence 48.28, -566 and 1637 of sub-pixel is mapped to Lmean.By each sub-pixel
The relation curve of coefficient of correspondence and the display voltage and average brightness is stored to driving chip；Display data are sent into driving core
Piece is transferred to display panel after calling the relation curve of the coefficient of correspondence and the display voltage and average brightness and processing.
The purpose of Demura be in order to the brightness disproportionation of identical Vdata lower panel sub-pixel by compensation become identical,
The present embodiment sets object brightness as average brightness Lmean, (1,1) sub-pixel is pre- when preset gray scale when input voltage is v
If voltage is v11, in order to guarantee that brightness reaches object brightness, it is necessary to according to 48.28, -566 and 1637 peace of coefficient of correspondence
Equal brightness relationship curve fmean=131.3*v^2-1370*v+3582 obtains relational expression: 48.28*v11 ' ^2-566*v11 '+
1637=131.3*v11^2-1370*v11+3582 IC calculation relational expression finds the display that corresponding v11 ' carries out virtual voltage.
The color of each sub-pixel can be adjusted to object brightness in this way, so that display is uniform.
Disclosed herein as well is a kind of display processing units of display panel.Referring to FIG. 5, Fig. 5 is one of the application
The schematic diagram of the display panel processing unit of embodiment；
The display processing unit includes:
Grayscale provides unit 103: the grayscale provides unit for providing multiple display voltages to the display panel；
Recording unit 101: the recording unit is used to record the display voltage and display brightness of each sub-pixel；
Generation unit 1021: the generation unit is used to generate the aobvious of each sub-pixel according to the multiple display voltage
Show voltage and brightness relationship curve, and calculates the relation curve of the display voltage and average brightness；
Map unit 1022: the relation curve of each sub-pixel is mapped to the display electricity by coefficient of correspondence
The relation curve of pressure and average brightness；
Storage unit 104: the storage unit be used for by the coefficient of correspondence of each sub-pixel and the display voltage with
The relation curve of average brightness is stored to driving chip；
Driving unit 105: the driving unit for will show data be sent into driving chip, call the coefficient of correspondence with
Display panel is transferred to after the relation curve of the display voltage and average brightness and processing.
Unit is provided by grayscale after display voltage of the needs offer to display panel is provided by operator first
103 provide multiple display voltages to display panel 1000；What the record of recording unit 101 provided while providing display voltage arrives
The display voltage of each sub-pixel and the brightness that each sub-pixel is tested by recording unit.According to the display of each sub-pixel of record electricity
Pressure and brightness generate the relation curve of the display voltage and brightness of each sub-pixel by generation unit 1021.Generation unit 1021
It can be computer, be fitted to obtain corresponding relationship curve by software.And generation unit also needs to calculate each display voltage
Corresponding average brightness, then the relation curve of display voltage and average brightness is calculated.It then will be each by map unit 1022
Sub-pixel is mapped to the relation curve of display voltage and average brightness by coefficient of correspondence.And by coefficient of correspondence and display voltage
It is transmitted to storage unit 104 with the relation curve of average brightness, storage unit 104 store the coefficient of correspondence of each sub-pixel and show
Show the relation curve of voltage and average brightness.Finally during display panel 1000 is shown, adjusted by driving unit 105
It with the coefficient of correspondence of each sub-pixel and shows the relation curve of voltage and average brightness, and is transferred to display panel after treatment
1000。
Data volume to be processed needed for the display processing unit of display panel provided by the present application is small, and the data volume of storage is small
And compensation is accurate.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (11)
1. a kind of display processing method of display panel, which is characterized in that
Multiple display voltages are provided to the display panel；
Record the display voltage and display brightness of each sub-pixel；
The display voltage and brightness relationship curve of each sub-pixel are generated according to the multiple display voltage, and is calculated described aobvious
Show the relation curve of voltage and average brightness；
The relation curve of each sub-pixel is mapped to the pass of the display voltage and average brightness by coefficient of correspondence
It is curve；
By the relation curve storage of the coefficient of correspondence of each sub-pixel and the display voltage and average brightness to driving chip；
Display data are sent into driving chip, call the relation curve of the coefficient of correspondence and the display voltage and average brightness
And display panel is transferred to after handling.
2. the display processing method of display panel according to claim 1, which is characterized in that
The display panel shows that grey-scale range is 0~n grayscale,
The display voltage and brightness relationship curve of each sub-pixel are generated according to the multiple display voltage, and is calculated described aobvious
Show that the relation curve of voltage and average brightness specifically includes:
The display voltage and brightness relationship curve of each sub-pixel are generated according at least k gray scale voltage, wherein k be less than etc.
In the maximum positive integer of 0.3* (n+1)；It include a gray scale voltage in 0~n/3 grayscale；It include b in n/3~2n/3 grayscale
Gray scale voltage；It include c gray scale voltage in 2n/3~n grayscale；A is the maximum positive integer less than or equal to 0.45k；B be less than
Maximum positive integer equal to 0.3k；C=k-a-b.
And calculate the relation curve of the display voltage and average brightness；The average brightness is each sub-pixel corresponding aobvious
Show the average value of the brightness under voltage.
3. the display processing method of display panel according to claim 1, which is characterized in that
The display panel shows that grey-scale range is 0~n grayscale,
The display voltage and brightness relationship curve of each sub-pixel are generated according to the multiple display voltage, and is calculated described aobvious
Show that the relation curve of voltage and average brightness specifically includes:
The display voltage and brightness relationship curve of each sub-pixel are generated according at least n+1 gray scale voltage,
And calculate the relation curve of the display voltage and average brightness；The average brightness is each sub-pixel corresponding aobvious
Show the average value of the brightness under voltage.
4. the display processing method of the display panel according to Claims 2 or 3, which is characterized in that
Each sub-pixel is numbered；
The display voltage of each sub-pixel and the relation curve of brightness are Ln=fn(vi), wherein n indicates the sub-pixel
Number, the i indicates corresponding grayscale；
The display voltage of each sub-pixel and the relation curve of the average brightness are Lmean=fmean(vi), wherein
Mean indicates the average value of each sub-pixel；The display panel includes at least the sub-pixel of three kinds of different colours, institute
The relation curve for stating display voltage and the average brightness includes at least three；The sub-pixel of different colours corresponds to different displays
The relation curve of voltage and average brightness.
5. the display processing method of display panel according to claim 4, which is characterized in that
The relation curve is the combination of one of multinomial, logarithmic function, exponential function, trigonometric function or concentration.
6. the display processing method method of display panel according to claim 4, which is characterized in that
The relation curve by each sub-pixel is mapped to the display voltage and average brightness by coefficient of correspondence
Relation curve specifically include:
Pass through coefficient of correspondence knBy the corresponding relationship f of the display voltage and brightness of the sub-pixeln(vi) it is mapped as f (kn, fmean
(vi))。
7. the display processing method of display panel according to claim 6, which is characterized in that
fn(vi)=an*vi+bn, fmean(vi)=amean*vi+bmean；
The relation curve by each sub-pixel is mapped to the display voltage and average brightness by coefficient of correspondence
Relation curve specifically include:
Pass through coefficient of correspondence aiAnd biBy the fn(vi) it is mapped as f (an, bn, fmean(vi))。
8. the display processing method of display panel according to claim 7, which is characterized in that
Pass through coefficient of correspondence coefficient of correspondence anAnd bnThe gray scale voltage v of the sub-pixel is mapped as (amean*v+bmean-bn)/an。
9. the display processing method of display panel according to claim 6, which is characterized in that
It is described to store the coefficient of correspondence of each sub-pixel to driving with the relation curve for showing voltage and average brightness
Chip specifically includes:
By the coefficient of correspondence knWith the relation curve f of display voltage and average brightnessmean(vi) store and arrive driving chip.
10. the display processing method of display panel according to claim 1, which is characterized in that
The display voltage for recording each sub-pixel and display brightness specifically include: the optics when providing each display voltage
Acquisition equipment records the corresponding display brightness of the sub-pixel.
11. a kind of display processing unit of display panel characterized by comprising
Grayscale provides unit: the grayscale provides unit for providing multiple display voltages to the display panel；
Recording unit: the recording unit is used to record the display voltage and display brightness of each sub-pixel；
Generation unit: the generation unit be used to be generated according to the multiple display voltage the display voltage of each sub-pixel with
Brightness relationship curve, and calculate the relation curve of the display voltage and average brightness；
Map unit: the relation curve of each sub-pixel is mapped to the display voltage by coefficient of correspondence and is averaged
The relation curve of brightness；
Storage unit: the storage unit is used for the coefficient of correspondence of each sub-pixel and the display voltage and average brightness
Relation curve storage to driving chip；
Driving unit: the driving unit for will show data be sent into driving chip, call the coefficient of correspondence and it is described show
Display panel is transferred to after showing the relation curve of voltage and average brightness and processing.
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