CN107845360A - A kind of display image modification method - Google Patents
A kind of display image modification method Download PDFInfo
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- CN107845360A CN107845360A CN201711109850.5A CN201711109850A CN107845360A CN 107845360 A CN107845360 A CN 107845360A CN 201711109850 A CN201711109850 A CN 201711109850A CN 107845360 A CN107845360 A CN 107845360A
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- 238000002715 modification method Methods 0.000 title claims description 4
- 238000003702 image correction Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 239000003086 colorant Substances 0.000 claims description 10
- 238000010606 normalization Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract 1
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- HUTDUHSNJYTCAR-UHFFFAOYSA-N ancymidol Chemical compound C1=CC(OC)=CC=C1C(O)(C=1C=NC=NC=1)C1CC1 HUTDUHSNJYTCAR-UHFFFAOYSA-N 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G09G3/2003—Display of colours
-
- 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
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Embodiment of the disclosure provides a kind of method that image correction is carried out to display, including being sampled to the sub-pixel of each color, increasing or decreasing is carried out according to the counter associated to comparer pixel of the sampled value of image correction parameters and global mean value, and is determined whether according to the rolling counters forward of sub-pixel and its surrounding sub-pixels after sampling terminates to adjust the driving voltage of corresponding sub-pixel.This method may determine that the region that color displays are uneven on display, and be adjusted by the specific aim of driving voltage to improve inhomogeneities.
Description
Technical field
Field of the disclosure on image display technology, more specifically, carrying out image correction to display on a kind of
Method.
Background technology
Generally include various types of display panels in the various equipment such as current computer, flat board, mobile phone, such as LCD,
LED, OLED etc..This class display is generally the display device of planar ultra-thin, by the colour element group being largely driven separately
Into these pixels are placed in front of light source or reflecting plate to produce image.Generally comprised in one colour element more than three
Individual multiple sub-pixels, each sub-pixel are configurable to one kind in display green, red or blueness, and green, it is red or
Each color in blueness comprises at least a sub-pixel.In use, the life-span of liquid crystal display is generally 5 years left sides
It is right.After long-time use, probably due to threshold voltage shift, water inlet, height in some pixels or sub-pixel in liquid crystal display
The a variety of causes such as temperature, aging and make it that the parameter such as brightness, contrast, saturation degree changes, in some instances it may even be possible to produce short-circuit or disconnected
Road etc. and form bad point.In addition, the performance curve of each color sub-pixel and differ, may some colors sub-pixel than it
His color earlier or be easier performance change occur.
The performance change either occurred with which kind of reason, may all occur over the display obvious light and shade it is uneven or
Person's color non-uniform phenomenon.Although display still includes the pixel for accounting for the normal work of most quantity, only portion
Point pixel goes wrong and may also cause user's needs more switching display.Therefore, hardware need not changed by currently stilling need one kind
In the case of the sub-pixel that occurs changing to performance compensates in a manner of the software correction of low cost method, it is aobvious to extend
Show the service life of device.
The content of the invention
Embodiment of the disclosure is used for solving at least some above mentioned problems, and provides a kind of display image modification method,
Its continuously display reference picture in predetermined correction time section, the predetermined correction time section are divided into multiple sampling periods；
Determine that the overall situation of the image correction parameters of all sub-pixels of each color in three kinds of colors of RGB is averaged in each sampling period
Value and each sub-pixel of each color image correction parameters indivedual values, image correction parameters for each color according only to
The grey scale change of sub-pixel and change；Indivedual values of at least one sub-pixel be more than global mean value it is predetermined first refer to threshold
Value or it is bigger when, will associate with least one sub-pixel amendment counter count one, each sub-pixel at the beginning of
Beginning count value is zero；It is less than the reference threshold of global mean value first or more hour in indivedual values of at least one sub-pixel, will be with
The count value of the amendment counter of at least one sub-pixel association successively decreases one；And after multiple sampling periods, according to meter
The count value of number device adjusts the driving voltage for the sub-pixel that at least some count values are not zero, wherein at least some count values not
At least having one around pixel where each sub-pixel in the sub-pixel for being zero includes the sub-pixel that count value is not zero
Adjacent pixel.
This method can perform automatically within the idle time of the display such as screen protection program, not influence user
The deterioration sub-pixel of the uniformity of influence display is determined in the case of use, and by being driven voltage (or electric current) to it
Compensation in the case where hardware or drive software compatibility need not be influenceed improve display effect.This method will not influence to use
In the case of the use of family, improve the display non-uniform phenomenon of display in a manner of driving voltage is corrected automatically.
In certain embodiments, the image correction parameters of each sub-pixel are defined as P=g+C1g3, wherein P is image correction
Parameter, g are gray value, C1For the constant less than 1.
In certain embodiments, driving voltage is reduced for negative sub-pixel for Counter Value, and for Counter Value
Increase driving voltage for positive sub-pixel.
In certain embodiments, adjusting driving voltage includes changing driving voltageIts
Middle sgn () is sign function, and C2 is positive constant, and N is Counter Value, and M is normalization coefficient.
In certain embodiments, all sons in the adjacent pixel where the sub-pixel that count value is not zero around pixel
When the count value of pixel is zero, the count value for the sub-pixel being not zero to the count value is zeroed out.
In certain embodiments, 8 of pixel where the sub-pixel that adjacent pixel is not zero including surrounding the count value are most
Neighbor pixel.
In certain embodiments, adjacent pixel includes surrounding each 16 time arest neighbors in 8 nearest neighbor pixels
Pixel.
In certain embodiments, the driving voltage for storing and updating the sub-pixel after adjustment every time changes and is stored in non-
In volatile memory.
In certain embodiments, when not showing reference picture, the driving voltage stored according to the last time is to each height
Pixel is driven.
In certain embodiments, the sample frequency corresponding to multiple sampling periods is less than the refreshing frequency of display reference picture
Rate, and the absolute value that the maximum drive voltage for being proportional to the last sub-pixel stored changes.
Above-described embodiment of the disclosure helps to provide a kind of low cost and does not influence the image correction of user's normal use
Method.This method can more efficiently judge occur the uneven region of color displays on display with the standard of the overall situation, and lead to
Cross to showing that the driving voltage in uneven region is adjusted accordingly to improve the color uniformity of display display image.
Brief description of the drawings
Present disclose provides accompanying drawing to illustrate some nonrestrictive examples according to disclosure principle, rather than is used for
Form any restrictions.
Fig. 1 is the schematic diagram for showing sub-pixel structure in pixel.
Fig. 2 is the flow chart according to the method and step of the embodiment of the present disclosure.
Embodiment
Term first, second, third, upper and lower, left and right etc. are not intended to limit the particular location of element, appoint without in definition
Where to or limitation sequentially.Preferred embodiments disclosed herein only for facilitating the understanding of those skilled in the art, and
It is not limited to the scope of the present disclosure, the scope of the present disclosure is included in various equivalent under the principle of disclosed embodiment or replaced
For the embodiment of property, and those skilled in the art can be from the content that the disclosure is apparently inferred to.
As shown in figure 1, each pixel of display generally comprises at least one red sub-pixel 10 in the prior art, at least
One blue subpixels 11, and at least one green sub-pixels 12.The sub-pixel of three kinds of colors can shape as an entirety
Into a colour element.The arrangement mode of red sub-pixel 10, blue subpixels 11 and green sub-pixels 12 can be RGB rows
Row or Pentile arrangements.Because the size of pixel is smaller, pixel can not apparently be told by observing the user of display a long way off
Interior sub-pixel, but can only see a bright spot.RGB sub-pixels in pixel can have different brightness or ash with various
Degree, so that user sees different colours.For example, when three kinds of color gray values are 0, user will be seen that black, and
When three kinds of color gray values are maximum (such as 255), user will be seen that white.Because the quantity of pixel is probably millions of
It is even more more, it is difficult to avoid some of which pixel and sub-pixel from occurring brightness, right in process of production or during use
Than the change of the parameters such as degree, saturation degree.This is will appear as with other parts in the image observed by human eye with obvious right
The non-uniform areas of ratio, so as to influence Consumer's Experience.Drive circuit 13 is generally matrix driving circuit, such as can include TFT
Array is for being respectively that each pixel provides driving voltage and driving current.
As shown in Fig. 2 the method for display image amendment starts from step S201, wherein in the predetermined correction time
Continuously display reference picture in section, the predetermined correction time section are divided into multiple sampling periods.The inverse in sampling period is sampling
Frequency.The sample frequency should be less than the refreshing frequency that display shows reference picture, and sampling when higher than refreshing frequency will be
Redundancy.Display reference picture shows successively when being preferably incorporated in display screen protection image to three kinds of colors of red, green, blue
Show.In addition it is also possible to a kind of color beyond three kinds of colors of red, green, blue, example are simply shown when display screen protects image
Such as white.
In step S202, all sons of each color in three kinds of colors of RGB are determined respectively within each sampling period
Indivedual values of the image correction parameters of each sub-pixel of global mean value and each color of the image correction parameters of pixel.Son
Indivedual values of the image correction parameters of pixel are preferably P=g+C1g3, wherein P is image correction parameters, and g is sub-pixel gray value
Or the difference of sub-pixel gray value and common benchmark gray value, C1It for the constant less than 1, and can be negative, but be not zero.
C1It is different for the sub-pixel of different colours.Above-described image correction parameters can provide relatively balanced amendment
The degree of accuracy and detection sensitivity.Those skilled in the art can define others according to the particular type of display and sub-pixel
Image correction parameters.For example, P=(g-G)+C can be defined1(g-G)3, wherein G is the color sub- picture defined in reference picture
The benchmark gray value of element, can also define P=g+C for the more long display of usage time1Ln (g), to more conform to its ash
The functional relation of degree and access times.For each sub-pixel, the gray value of the sub-pixels of RBG tri- is read respectively and to every height
The gray value that pixel is read calculates above-mentioned image correction parameters.Assuming that n times sampling (N is carried out to a kind of color>1), in n times
Indivedual values of the image correction parameters of each sub-pixel calculated in sampling be added and divided by the quantity of N and sub-pixel, from
And calculate the global mean value of sub-pixel image corrected parameter.
In step S203, each sub-pixel is associated with a counter, and it is zero for the initial value of each color, root
Determine it is uneven whether sub-pixel may cause to show according to its final count value.Define the first ginseng of an image correction parameters
Threshold value is examined, such as when the difference of indivedual values and global mean value exceedes the 20% of global mean value, then judges the performance of sub-pixel
Change occur needs to adjust the count value of counter.Specifically, in indivedual values the first reference bigger than global mean value of sub-pixel
When more than threshold value, by the count one of the amendment counter associated with the sub-pixel.And anyway when indivedual values of sub-pixel
When more than the first reference threshold smaller than global mean value, the count value of the amendment counter associated with the sub-pixel is successively decreased one.
This can for example represent the excessively bright or excessively dark situation of sub-pixel respectively.
In step S204, after the above-mentioned sampling period finishes, according to the final count value of counter adjust some but
It is not all of the driving voltage for the sub-pixel that final count value is not zero.The sub-pixel to be adjusted is not zero except count value
In addition, same color in 8 nearest neighbor pixels where also requiring the sub-pixel around pixel at least one pixel
There is also count value to be not zero for pixel.Alternatively, it is desirable to each the 16 time arest neighbors picture in 8 nearest neighbor pixels
Also having the same color sub-pixel of at least one pixel in element, there is also count value to be not zero.If in 24 pixels of surrounding not
In the presence of similar sub-pixel performance change, then may the sub-pixel belong to due to bad point, Wu Fatong caused by open circuit or short circuit
Cross adjustment driving voltage to be modified, it is also possible to which the sub-pixel is because measurement error or accidental cause cause count value one or two
It is not zero in secondary sampling.Because other neighbouring sub-pixels are normal, only one exception sub-pixel will not typically cause user to be seen
To display picture be uneven.Therefore, only have in the viewing area that 25 adjacent pixels are formed more than two
When problem occurs for sub-pixel, the driving voltage or electric current of these sub-pixels are just adjusted.In the phase for the sub-pixel that count value is not zero
When the count value of all sub-pixels in adjacent pixel is zero, the count value for the sub-pixel being not zero to the count value is zeroed out
So as to the adjustment of flicker driving voltage.One the second reference threshold can also be set, and it limits every 25 adjacent pixels and formed
The number of sub-pixel that is not zero of viewing area count value, exceed second ginseng in the sub-pixel number that count value is not zero
When examining threshold value, the driving voltage of these sub-pixels is modified, and when less than second reference threshold, then ignoring amendment makes
With normal driving voltage.
It is positive sub-pixel for count value, may illustrates that its brightness is too high and be fallen below, it is necessary to drive it voltage
The level of other sub-pixels, so that the difference of its image correction parameters and global mean value is less than the first reference threshold.For meter
Numerical value is negative sub-pixel, then brightness may be illustrated not enough, it is necessary to which driving it voltage on the contrary is elevated above other sub- pictures
Element.Adjustment driving voltage can for example change driving voltageWherein sgn () is symbol letter
Number, C2For positive constant, N is Counter Value, and M is normalization coefficient.M selection can be used for choosing on Δ V curve meeting
One section of functional relation between brightness and driving voltage.Preferably, M can be all sub-pixel Counter value N maximum.
C2It is different similarly to different colours, for because threshold voltage shift and caused by display it is uneven, intended according to above formula
The driving voltage adjustment of conjunction is more adapted to.Sub-pixel driving voltage is adjusted for example by adjusting tft array in drive circuit 13
To should row and column where sub-pixel thin film transistor (TFT) grid or drain electrode be applied to the voltage of sub-pixel unit and realize.
Similarly, the electric current for flowing through sub-pixel can also be adjusted.
In view of display show it is uneven just may can slowly show after longer usage time, can be non-volatile
Property memory in store every time adjustment after sub-pixel driving voltage change, and every time change driving voltage after renewal should
Data., will be directly according to last institute when grade does not show reference picture during display dormancy when for example just starting shooting
The driving voltage of storage is driven to each sub-pixel, in order to avoid image correction must be first carried out before user's use.May be used also
To store the variation tendency that each driving voltage changes, the change of driving voltage is bigger, shows that display may be because aging etc.
Reason causes to show uneven more serious, and sample frequency when now needing to properly increase image correction is more accurate to obtain
True adjustment result.And the change of driving voltage is smaller, show the performance kept stable of each sub-pixel in display, this
When sample frequency when can suitably reduce image correction to save computing resource and power consumption.Sample frequency it is possible thereby to select be
The absolute value changed to the driving voltage stored is directly proportional.
Described above is only example embodiment of the principle of the present invention with the scope of, and those skilled in the art are reading this
Other equivalent integers being readily apparent that after text should also belong within scope of the invention.
Claims (10)
1. a kind of display image modification method, it is characterised in that comprise the following steps：
The continuously display reference picture in predetermined correction time section, the predetermined correction time section are divided into multiple sampling periods；
Within each sampling period determine three kinds of colors of RGB in all sub-pixels of each color image correction parameters it is complete
Office average value and each sub-pixel of each color described image corrected parameter indivedual values, described image corrected parameter for
Each color changes according only to the grey scale change of sub-pixel；
, will when more than indivedual values the first predetermined reference threshold bigger than the global mean value of at least one sub-pixel
The count one of the amendment counter associated with least one sub-pixel, the initial count value of each sub-pixel is zero；
, will be with when more than indivedual value first reference thresholds smaller than the global mean value of at least one sub-pixel
The count value of the amendment counter of at least one sub-pixel association successively decreases one；And
After the multiple sampling period, the son that at least some count values are not zero is adjusted according to the count value of the counter
The driving voltage of pixel, where each sub-pixel in the sub-pixel that wherein at least some count values are not zero around pixel
An adjacent pixel for including the sub-pixel that count value is not zero at least be present.
2. the method described in claim 1, it is characterised in that the described image corrected parameter of wherein each sub-pixel is defined as：
P=g+C1g3, wherein P is image correction parameters, and g is gray value, C1For the constant less than 1.
3. the method described in claim 2, it is characterised in that driving voltage is reduced for negative sub-pixel for Counter Value, and
Increase driving voltage for Counter Value for positive sub-pixel.
4. the method described in claim 3, it is characterised in that adjustment driving voltage includes changing driving voltageWherein sgn () is sign function, C2For positive constant, N is Counter Value, and M is for normalization
Number.
5. the method for claim 1, it is characterised in that in the adjacent pixel where the sub-pixel that count value is not zero around pixel
In the count value of all sub-pixels when being zero, the count value for the sub-pixel being not zero to the count value is zeroed out.
6. the method for claim 1, it is characterised in that the adjacent pixel includes the sub-pixel institute being not zero around the count value
In 8 nearest neighbor pixels of pixel.
7. the method for claim 6, it is characterised in that the adjacent pixel includes surrounding each in 8 nearest neighbor pixels
16 nearest neighbor pixels.
8. the method for claim 7, it is characterised in that also include the driving voltage for storing and updating the sub-pixel after adjusting every time
Change and store in the nonvolatile memory.
9. the method for claim 8, it is characterised in that when not showing the reference picture, according to the last driving stored
Voltage is driven to each sub-pixel.
10. the method for claim 9, it is characterised in that the sample frequency corresponding to the multiple sampling period is less than described in display
The refreshing frequency of reference picture, and the absolute value that the maximum drive voltage for being proportional to the last sub-pixel stored changes.
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| CN201711109850.5A CN107845360B (en) | 2017-11-11 | 2017-11-11 | Display image correction method |
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| CN201711109850.5A CN107845360B (en) | 2017-11-11 | 2017-11-11 | Display image correction method |
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| CN107845360A true CN107845360A (en) | 2018-03-27 |
| CN107845360B CN107845360B (en) | 2021-05-07 |
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2017
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