CN106251830B - The restorative procedure and its device of the bad display of display - Google Patents
The restorative procedure and its device of the bad display of display Download PDFInfo
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- CN106251830B CN106251830B CN201610647084.7A CN201610647084A CN106251830B CN 106251830 B CN106251830 B CN 106251830B CN 201610647084 A CN201610647084 A CN 201610647084A CN 106251830 B CN106251830 B CN 106251830B
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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Abstract
The present invention relates to the restorative procedure and its device of a kind of bad display of display, the restorative procedure of the bad display of aforementioned display device includes：The grayscale value of the corresponding each pixel of input picture is obtained, and confirms each pixel position whether in bad display area according to look-up table；If pixel position in bad display area, judges whether the grayscale value of each pixel in bad display area can find corresponding reparation value in a lookup table；If the grayscale value of the pixel in bad display area can find corresponding reparation value in a lookup table, pixel is repaired by searching for table, obtains the revised grayscale value of pixel；The corresponding image of revised grayscale value is shown.The present invention also provides the prosthetic devices of the bad display of corresponding display.The present invention can be quickly found out the correction value needed corresponding to modified pixel by searching for the mode of table, quickly and efficiently be repaired to the pixel in bad display area.
Description
Technical field
The present invention relates to display technology fields, restorative procedure more particularly to a kind of bad display of display and its
Device.
Background technology
Due to being unevenly distributed etc. thin film technology technology, backlight illumination, display has certain Mura
(bad display) defect phenomenon exists.Mura defects refer to that the display brightness of display is uneven, and causes showing for various traces
As.Mura defects can influence module yields and display effect.
Invention content
Based on this, it is necessary to for the bad problem of the bad display and module yields how repaired in display, carry
For the restorative procedure and its device of a kind of bad display of display.
A kind of restorative procedure of the bad display of display, includes the following steps：
The grayscale value of the corresponding each pixel of input picture is obtained, and confirms that each pixel position is according to look-up table
It is no in bad display area；
If pixel position in bad display area, judges the grayscale value of each pixel in bad display area
Whether corresponding reparation value can be found in a lookup table；
If the grayscale value of the pixel in bad display area can find corresponding reparation value in a lookup table, by looking into
It looks for table to repair pixel, obtains the revised grayscale value of pixel；
The corresponding image of revised grayscale value is shown.
If above-mentioned pixel position judges bad viewing area in bad display area in one of the embodiments,
Further include following after the step of whether grayscale value of each pixel in domain can find corresponding reparation value in a lookup table
Step：
If the grayscale value of the pixel in bad display area cannot find corresponding reparation value in a lookup table, pass through
The mode of filtering, repairs pixel, obtains the revised grayscale value of pixel.
If the grayscale value of the pixel in above-mentioned bad display area cannot be in a lookup table in one of the embodiments,
It finds corresponding reparation value to repair pixel then by way of filtering, obtains the revised grayscale value of pixel
The step of include：
According to look-up table, search the brightness value of normal region corresponding with grayscale value is inputted, and obtain pixel with it is defeated
Enter the amendment ash that the grayscale value corresponding to the brightness value of the brightness value difference minimum of the corresponding normal region of grayscale value is pixel
Rank value；
Centered on pixel, the filter window (n is odd number) of n × n is selected, is calculated in filter window according to following formula
Filter factor a per ringi：
Wherein, a1<a2<…<ai；N is filter window size；I is that the annulus number of filter window indexes；J is filter window
Every ring number of pixels index；L` is the amendment grayscale value of pixel；AijFor the grayscale value of the pixel of corresponding position；
According to the filter factor a per ring in filter windowiCorrection factor a is calculatedi`, ai`=1-ai；
According to correction factor ai` corrects the grayscale value of corresponding pixel points, and the amendment grayscale value of corresponding pixel points is to correct to be
Number aiThe product of ` and the pixel original gray-scale value.
In one of the embodiments, in the grayscale value for obtaining the corresponding each pixel of input picture, and determine input
It is further comprising the steps of before the step of bad display area in image：
The white picture of a n (n=0~255) grayscale value is inputted respectively to display, and display is shot using brightness imager
It shows picture, obtains the luminance matrix of display picture, wherein display picture includes normal display area and bad display area；
According to the luminance matrix of display picture, the brightness value that normal region in picture is shown under n grayscale values is obtained, and obtain
To the brightness value for showing each pixel in picture in bad display area under n grayscale values, and record bad viewing area
The coordinate data of each pixel in domain；
According to each n grayscale values, the corresponding normal region of each n grayscale values brightness value and bad display area in each
The coordinate data of the brightness value of pixel and each pixel establishes look-up table.
If the grayscale value of the pixel in above-mentioned bad display area can be looked in a lookup table in one of the embodiments,
To corresponding reparation value, then the step of being repaired to pixel by searching for table, obtain the revised grayscale value of pixel
Including：
Grayscale value is inputted, obtains the picture under grayscale value in the brightness value and bad display area of normal region in a lookup table
The brightness value of vegetarian refreshments；
The pixel brightness value institute equal with the corresponding brightness value of normal region of grayscale value is inputted is searched in a lookup table
Corresponding grayscale value, grayscale value are the revised grayscale value of pixel.
A kind of prosthetic device of the bad display of display, including：
Acquiring unit, the grayscale value for obtaining the corresponding each pixel of input picture, and confirmed often according to look-up table
Whether a pixel position is in bad display area；
Judging unit, for when pixel position is in bad display area, judging each in bad display area
Whether the grayscale value of pixel can find corresponding reparation value in a lookup table；
Look-up table repairs unit, for that can be found in a lookup table pair when the grayscale value of the pixel in bad display area
When the reparation value answered, pixel is repaired by searching for table, obtains the revised grayscale value of pixel；And
Display unit, for showing the corresponding image of revised grayscale value.
The prosthetic device of the bad display of aforementioned display device further includes that unit is repaired in filtering in one of the embodiments,
Filtering repairs unit and is used to that when the grayscale value of the pixel in bad display area corresponding reparation cannot to be found in a lookup table
When value, by way of filtering, pixel is repaired, obtains the revised grayscale value of pixel.
Above-mentioned filtering reparation unit includes in one of the embodiments,：
Grayscale acquiring unit is corrected, for according to look-up table, searching the brightness of normal region corresponding with input grayscale value
Value, and obtain pixel with the ash corresponding to the brightness value of the brightness value difference minimum of the corresponding normal region of input grayscale value
Rank value is the amendment grayscale value of pixel；
Selecting unit, for centered on pixel, selecting the filter window of n × n (n is odd number)；
First computing unit, for calculating the filter factor a in filter window per ring according to following formulai：
Wherein, a1<a2<…<ai；N is filter window size；I is that the annulus number of filter window indexes；J is filter window
Every ring number of pixels index；L` is the amendment grayscale value of pixel；AijFor the grayscale value of the pixel of corresponding position；
Second computing unit, for according to the filter factor a per ring in filter windowiCorrection factor a is calculatedi`：ai`
=1-ai；
Amending unit, for according to correction factor ai` corrects the grayscale value of corresponding pixel points, the amendment ash of corresponding pixel points
Rank value is correction factor aiThe product of ` and the pixel original gray-scale value.
The prosthetic device of the bad display of aforementioned display device further includes in one of the embodiments,：
Luminance matrix acquiring unit receives the display picture that brightness imager is sent for being connect with brightness imager
Luminance matrix data, brightness imager are used to acquire the display picture after the display input white picture of n (n=0~255) grayscale value
Face obtains the luminance matrix of display picture and luminance matrix data is sent to luminance matrix acquiring unit；
Brightness value and grayscale value acquiring unit obtain showing under n grayscale values for the luminance matrix according to display picture
The brightness value of normal region in picture, and obtain showing each pixel in picture in bad display area under n grayscale values
The brightness value of point, and record the coordinate data of each pixel in bad display area；
Look-up table establishes unit, for according to each n grayscale values, the brightness value of the corresponding normal region of each n grayscale values and not
The coordinate data of the brightness value of each pixel in good display area and each pixel establishes look-up table.
Above-mentioned look-up table reparation unit includes in one of the embodiments,：
Brightness value confirmation unit obtains the brightness value of normal region under grayscale value in a lookup table for inputting grayscale value
With the brightness value of the pixel in bad display area；
Grayscale value acquiring unit, for searching the bright of pixel normal region corresponding with grayscale value is inputted in a lookup table
Grayscale value corresponding to the equal brightness value of angle value, grayscale value are the revised grayscale value of pixel.
The restorative procedure and device of the bad display of aforementioned display device obtain the ash of the corresponding each pixel of input picture
Rank value, and according to each pixel position of table search is searched whether in bad display area, if pixel position is bad aobvious
Show in region, then judges whether the grayscale value of each pixel in bad display area can find corresponding repair in a lookup table
Complex value, if the grayscale value of the pixel in bad display area can find corresponding reparation value in a lookup table, by searching for
Table repairs pixel, obtains the revised grayscale value of pixel, and by the corresponding image of revised grayscale value into
Row display.The restorative procedure and its device of the bad display of aforementioned display device directly find the grayscale of the pixel by searching for table
The corresponding correction value of value can be quickly found out the correction value needed corresponding to modified pixel by searching for the mode of table,
So as to which the pixel in bad display area in input picture is quickly and efficiently repaired.
Description of the drawings
Fig. 1 is the process principle figure of the restorative procedure of the bad display of display in one embodiment；
Fig. 2 is the flow chart of the restorative procedure of the bad display of display in one embodiment；
Fig. 3 is the structural schematic diagram of look-up table in one embodiment；
Fig. 4 is that the correction value being modified to the pixel in bad display area using look-up table in one embodiment is looked into
Look for process schematic；
Fig. 5 is to be repaiied to the pixel of the special grayscale value in bad display area using look-up table in one embodiment
Positive correction value search procedure schematic diagram；
Fig. 6, which is that grayscale value is corresponding with preceding grayscale value is corrected after the amendment of each pixel in filter window in one embodiment, to close
It is schematic diagram；
Fig. 7 is the structure principle chart of the reparation of the bad display of display in one embodiment；
Fig. 8 is the structural schematic diagram that unit is repaired in filtering in one embodiment.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, a kind of restorative procedure of the bad display of display, includes the following steps：
Step 102：The grayscale value of the corresponding each pixel of input picture is obtained, and each pixel is confirmed according to look-up table
Whether point position is in bad display area.
Specifically, look-up table is the brightness value of the normal region in addition to bad display area, bad display in input picture
The relation table of the brightness value of each pixel and corresponding grayscale value in region, and recorded in bad display area in look-up table
The coordinate data of each pixel.
For the input picture of display, the grayscale value of the corresponding each pixel of input picture is obtained, and according to each
The position of pixel is searched in a lookup table, pixel is confirmed whether in bad display area, if pixel is not
In good display area, step 104 is executed.
Step 104：If pixel position in bad display area, judges each pixel in bad display area
Grayscale value whether can find corresponding reparation value in a lookup table.
Specifically, when pixel is in bad display area, the input grayscale value pair of pixel is searched in a lookup table
The brightness value for the normal display area answered, searches whether the corresponding brightness value in pixel position has and find normal aobvious later
Show the identical brightness value of the brightness value in region, if the corresponding brightness value in pixel position has and the normal display area that finds
The identical brightness value of brightness value can then find the reparation value of pixel, execute 106.
Step 106：If the grayscale value of the pixel in bad display area can find corresponding reparation value in a lookup table,
Then pixel is repaired by searching for table, obtains the revised grayscale value of pixel.
Specifically, when the brightness value of normal display area that find the corresponding brightness value in pixel position and have and find
When identical, the corresponding grayscale value of the brightness value is obtained, and the amendment grayscale value by the grayscale value got as pixel exports.
Step 108：The corresponding image of revised grayscale value is shown.
The restorative procedure of the bad display of aforementioned display device obtains the grayscale value of the corresponding each pixel of input picture,
And according to each pixel position of table search is searched whether in bad display area, if pixel position is in bad display area
It is interior, then judge whether the grayscale value of each pixel in bad display area can find corresponding reparation value in a lookup table,
If the grayscale value of the pixel in bad display area can find corresponding reparation value in a lookup table, by searching for table to picture
Vegetarian refreshments is repaired, and obtains the revised grayscale value of pixel, and the corresponding image of revised grayscale value is shown.
The restorative procedure of the bad display of aforementioned display device directly finds the amendment corresponding to the grayscale value of the pixel by searching for table
Value can be quickly found out the correction value needed corresponding to modified pixel, so as to input by searching for the mode of table
Pixel in image in bad display area is quickly and efficiently repaired.
In one embodiment, further comprising the steps of after step 104：
Step 107：If the grayscale value of the pixel in bad display area cannot find corresponding reparation in a lookup table
Value, then by way of filtering, repair pixel, obtain the revised grayscale value of pixel.
When the brightness not identical with the brightness value of the normal display area found of the corresponding brightness value in pixel position
When value, the grayscale value of the pixel in bad display area cannot find corresponding reparation value in a lookup table.Specifically, bad
The special grayscale value of certain pixels can not directly find matched output grayscale value from look-up table in display area,
Special grayscale value refers to：|The Liang Duzhi | closest to the target brightness value that the target brightness value-of the grayscale value can be found;/ should
The Mu Biaoliangduzhi > of grayscale value;3%, then this grayscale is special grayscale value.When the pixel in bad display area
When special grayscale value is in boundary and can not be modified by above-mentioned look-up table mode, pixel is carried out by way of filtering
It repairs, pixel grayscale value executes step 108 after repairing.
Further, in one embodiment, using filtering mode to the pixel of special grayscale value in bad display area
The step of grayscale value of point is repaired is as follows：
First, according to look-up table, the brightness value of normal region corresponding with input grayscale value is searched, and obtains pixel
Grayscale value corresponding to the brightness value of the brightness value difference minimum of normal region corresponding with input grayscale value is repairing for pixel
Positive grayscale value.
Later, centered on pixel, the filter window (n is odd number) of n × n is selected, is calculated and is filtered according to following formula
Filter factor a in window per ringi：
Wherein, a1<a2<…<ai；N is filter window size；I is that the annulus number of filter window indexes；J is filter window
Every ring number of pixels index；AijFor the grayscale value of the pixel of corresponding position.
Then, according to the filter factor a per ring in filter windowiCorrection factor a is calculatedi`, ai`=1-ai。
Finally, according to correction factor ai` corrects the grayscale value of corresponding pixel points, and the amendment grayscale value of corresponding pixel points is to repair
Positive coefficient aiThe product of ` and the pixel original gray-scale value.
In the present embodiment, the brightness value difference minimum of normal region corresponding with input grayscale value is searched in a lookup table
Grayscale value corresponding to brightness value is the amendment grayscale value of pixel, that is, selects normal area corresponding with input grayscale in look-up table
The corresponding grayscale value of the immediate brightness value of brightness value in domain as pixel amendment grayscale value, to the grayscale value of pixel into
Row is corrected.In one embodiment, the brightness of immediate brightness value and normal region corresponding with input grayscale value is found
Value difference value minimum positive and negative 1.
Due to choosing the corresponding grayscale value of the immediate brightness value of brightness value of normal region corresponding with input grayscale value
Grayscale value amendment is carried out to the pixel of special grayscale value, therefore, output brightness and the normal region brightness of pixel can
Difference.So in order to desalinate the output luminance difference of special grayscale value pixel in bad display area, chosen in the present embodiment
Filter window, using filtering method to the output grayscale value of the pixel in bad display area around special grayscale value pixel
It is modified, transition is carried out to the output brightness of special grayscale value pixel in bad display area, makes special grayscale value pixel
The output luminance difference of point is not particularly pertinent, desalinates the output luminance difference of special grayscale value pixel and its surrounding pixel point.
The size of specific filter window is corresponding with input grayscale according to the corresponding brightness value of amendment grayscale value of special grayscale value pixel
Normal region brightness value difference and bad display area area choose.
In one embodiment, further comprising the steps of before step 102：A n (n=0~255) grayscale value is inputted respectively
White picture shoots the display picture of display using brightness imager to display, obtains the luminance matrix of display picture,
In, display picture includes normal display area and bad display area；According to the luminance matrix of display picture, obtain in n grayscale
The brightness value of normal region in the lower display picture of value, and obtain showing under n grayscale values every in bad display area in picture
The brightness value of one pixel, and record the coordinate data of each pixel in bad display area；According to each n grayscale values,
Brightness value and each picture of the brightness value and each pixel in bad display area of the corresponding normal region of each n grayscale values
The coordinate data of vegetarian refreshments establishes look-up table.
Specifically, the full white image of one n grayscale values of input shoots display to display using brightness imager every time
Show picture, the resolution ratio of brightness imager is higher, the brightness data of each loudness point can be obtained, to obtain n grayscale values
The luminance matrix of lower display picture, obtains showing normal region in picture under n grayscale values according to the luminance matrix of display picture
The brightness value of brightness value and each pixel in bad display area is finally corresponded to according to each n grayscale values, each n grayscale values
The brightness value of normal region and the brightness value of each pixel in bad display area and each pixel number of coordinates
According to the R/G/B look-up tables for establishing 255 × N as shown in Figure 3 (N is the pixel number+1 in bad display area).
In one embodiment, step 106 includes：Grayscale value is inputted, obtains normal region under grayscale value in a lookup table
Brightness value and the pixel in bad display area brightness value；It is corresponding with input grayscale value that pixel is searched in a lookup table
Normal region the equal brightness value of brightness value corresponding to grayscale value, grayscale value is the revised grayscale value of pixel.
The restorative procedure of the bad display of aforementioned display device is described in detail below in conjunction with specific embodiment.
Referring to Fig. 2, a kind of restorative procedure of the bad display of display, includes the following steps：
Step 202：Each pixel grayscale value of input picture is obtained, confirms pixel whether in bad display area.
For the input picture of display, the grayscale value of the corresponding each pixel of input picture is obtained, and according to each
The position of pixel is searched in a lookup table, pixel is confirmed whether in bad display area, if pixel is not
In good display area, step 204 is executed, otherwise, if pixel is not processed not in bad display area.
Step 204：Whether judge the grayscale value of each pixel in bad display area can find pair in a lookup table
The reparation value answered.
After it is in bad display area pixel position range to determine pixel position, look-up table judgement is continued through
Whether the brightness of the pixel can be modified by searching for table.The input grayscale value for searching pixel in a lookup table corresponds to
Normal display area brightness value, search the normal the display whether corresponding brightness value in pixel position has and find later
The identical brightness value of brightness value in region, if the corresponding brightness value in pixel position have and the normal display area that finds it is bright
The identical brightness value of angle value can then find the reparation value of pixel, execute 206.Otherwise, if the corresponding brightness value of pixel does not have
There is brightness value identical with the brightness value of the normal display area found, then cannot find the reparation value of pixel, execute step
Rapid 208.
Specifically, as shown in figure 4, when it is 127 to input grayscale value, the brightness value of pixel 1 is in bad display area
The brightness value of 74nit, the corresponding normal display area of input grayscale 127 are 77nit, at this point, searching 1 corresponding brightness of pixel
Whether there is 77nit in value, as shown in Figure 1,77nit can be found in 1 corresponding brightness value of pixel, therefore, pixel 1
Grayscale value can find corresponding reparation value in a lookup table.Likewise, for pixel 2, pixel N-1 and the equal energy of pixel N
It is enough to find corresponding grayscale value reparation value in a lookup table.
Step 206：Corresponding look-up table obtains the revised grayscale value of pixel.
Specifically, finding corresponding output grayscale value in a lookup table according to input grayscale value, ensure bad display area
The brightness value of interior pixel is correct.As shown in figure 4, according to step 204, input grayscale is obtained in a lookup table by input grayscale value
The brightness value of the brightness value and the pixel in bad display area of the lower normal region of value, search in a lookup table pixel with it is defeated
After the equal brightness value of brightness value for entering the corresponding normal region of grayscale value, the grayscale value corresponding to the brightness value is obtained, this is bright
Grayscale value corresponding to angle value is the revised grayscale value of pixel.
As shown in figure 4, in 1 corresponding brightness value of pixel, the grayscale value corresponding to brightness value 77 is 138, therefore, pixel
The revised grayscale value of point 1 is 138.Likewise, the revised grayscale value of pixel 2 is 150, the amendment of pixel N-1
Grayscale value afterwards is 143, and the revised grayscale value of pixel N is 154.
Step 208：Pixel is repaired by filtering mode.
When the brightness not identical with the brightness value of the normal display area found of the corresponding brightness value in pixel position
When value, the grayscale value of the pixel in bad display area cannot find corresponding reparation value in a lookup table, need to pass through filter
The mode of wave repairs pixel.
Specifically, the special grayscale value of certain pixels can not be directly found therewith from look-up table in bad display area
The output grayscale value to match, special grayscale value refer to：|The target brightness value-of the grayscale value can find closest to the mesh
Mark the Liang Duzhi | of brightness value;The Mu Biaoliangduzhi > of/grayscale value;3%, then this grayscale is special grayscale value, wherein mesh
It is the brightness value for inputting the corresponding normal region of grayscale to mark brightness value.For example, as shown in figure 5, picture in bad display area
Vegetarian refreshments 2, when input grayscale is 254, the brightness value of normal display area is 300, then 2 target brightness value of pixel is 300,
The brightness value closest to the target brightness value that can be found in look-up table is 290, then , |300-290|/ 300=3.3%
>3%, pixel 2 is special grayscale value pixel.
Further, when the special grayscale value of the pixel in bad display area is in boundary can not be by above-mentioned lookup
When table mode is modified, pixel is repaired by way of filtering.Specifically include following steps：
First, according to look-up table, the brightness value of normal region corresponding with input grayscale value is searched, and obtains pixel
Grayscale value corresponding to the brightness value of the brightness value difference minimum of normal region corresponding with input grayscale value is repairing for pixel
Positive grayscale value.
Specifically, the brightness value of the corresponding normal region of input grayscale value is the target brightness value for inputting grayscale.Such as Fig. 5
Shown, the input grayscale value L of pixel 2 is 254, and the target brightness value of input grayscale value L is 300nit, can in look-up table
The brightness value closest to desired value found is 290nit, and it is 255 to correspond to grayscale value, then pixel 2 is revised
Grayscale value L ' is 255.
Due to choosing the corresponding grayscale value of the immediate brightness value of brightness value of normal region corresponding with input grayscale value
Grayscale value amendment is carried out to the pixel 2 of special grayscale value, therefore, output brightness and the normal region brightness of pixel 2 have
Institute's difference.In order to desalinate the output luminance difference of special grayscale value pixel 2 in bad display area, need to pixel 2 weeks
The pixel enclosed is further filtered.
Later, centered on pixel 2, the filter window (n is odd number) of n × n is selected, is calculated and is filtered according to following formula
Filter factor a in window per ringi：
Wherein, a1<a2<…<ai；N is filter window size；I is that the annulus number of filter window indexes；J is filter window
Every ring number of pixels index；L` is the amendment grayscale value of pixel；AijFor the grayscale value of the pixel of corresponding position.
The size of specific filter window, the i.e. value of n are corresponding bright according to the amendment grayscale value of special grayscale value pixel
The difference of brightness value and the area of bad display area of angle value normal region corresponding with input grayscale are chosen.As shown in fig. 6,
In the present embodiment, the value of n is 5, centered on pixel 2, using 5 × 5 filter window to the pixel around pixel 2
Output grayscale value be modified, then calculate in filter window per ring filter factor aiFormula it is as follows：
The filter factor a of an outermost ring can be calculated by above formula1Outermost second between an outermost ring and central point
The filter factor a of ring2。
Then, according to the filter factor a per ring in filter windowiCorrection factor a is calculatedi`, ai`=1-ai。
Specifically, in the present embodiment, by the filter factor a of an outermost ring derived above1With an outermost ring and central point
Between outermost second ring filter factor a2The correction factor a of an outermost ring is calculated1` and an outermost ring and central point it
Between outermost second ring obtain correction factor a2` is as follows：
Finally, according to correction factor ai` corrects the grayscale value of corresponding pixel points, and the amendment grayscale value of corresponding pixel points is to repair
Positive coefficient aiThe product of ` and the pixel original gray-scale value.
As shown in fig. 6, by correction factor a1` and a2` is multiplied with the original gray-scale value of corresponding pixel points respectively, is corrected
Coefficient a1`、a2The product of the original gray-scale value of ` and corresponding pixel points is the amendment grayscale value of corresponding pixel points.
Specifically, above centered on pixel 2, filter window is chosen, using filtering method to the picture around pixel 2
The output grayscale value of vegetarian refreshments is modified, and can be carried out transition to the output brightness of pixel 2, be made the output brightness of pixel 2
Difference is not particularly pertinent, desalinates the output luminance difference of pixel 2 and its surrounding pixel point, to reach optimal display result.
Step 210：The corresponding image of revised grayscale value is shown.
Referring to Fig. 7, a kind of prosthetic device of the bad display of display, including：
Acquiring unit 502, the grayscale value for obtaining the corresponding each pixel of input picture, and confirmed according to look-up table
Whether each pixel position is in bad display area.
Judging unit 504, for when pixel position is in bad display area, judging each in bad display area
Whether the grayscale value of a pixel can find corresponding reparation value in a lookup table.
Look-up table repairs unit 506, can be looked in a lookup table for the grayscale value when the pixel in bad display area
When to corresponding reparation value, pixel is repaired by searching for table, obtains the revised grayscale value of pixel.
Display unit 508, for showing the corresponding image of revised grayscale value.
In one embodiment, the prosthetic device of the bad display of aforementioned display device further includes that unit 510, filter are repaired in filtering
Wave repairs unit 510 and is used to that when the grayscale value of the pixel in bad display area corresponding reparation cannot to be found in a lookup table
When value, by way of filtering, pixel is repaired, obtains the revised grayscale value of pixel.
As shown in figure 8, in one embodiment, above-mentioned filtering repairs unit 510 and includes：
Grayscale acquiring unit 5102 is corrected, for according to look-up table, searching normal region corresponding with input grayscale value
Brightness value, and obtain pixel with corresponding to the brightness value of the brightness value difference minimum of the corresponding normal region of input grayscale value
Grayscale value be pixel amendment grayscale value.
Selecting unit 5104, for centered on pixel, selecting the filter window of n × n (n is odd number).
First computing unit 5106, for calculating the filter factor a in filter window per ring according to following formulai：
Wherein, a1<a2<…<ai；N is filter window size；I is that the annulus number of filter window indexes；J is filter window
Every ring number of pixels index；L` is the amendment grayscale value of pixel；AijFor the grayscale value of the pixel of corresponding position.
Second computing unit 5108, for according to the filter factor a per ring in filter windowiCorrection factor a is calculatedi
`：ai`=1-ai。
Amending unit 5110, for according to correction factor ai` corrects the grayscale value of corresponding pixel points, and corresponding pixel points are repaiied
Positive grayscale value is correction factor aiThe product of ` and the pixel original gray-scale value.
In one embodiment, the prosthetic device of the bad display of aforementioned display device further includes：Luminance matrix acquiring unit,
Brightness value establishes unit with grayscale value acquiring unit and look-up table, and luminance matrix acquiring unit is used to connect with brightness imager,
The luminance matrix data for the display picture that brightness imager is sent are received, brightness imager is for acquiring display input n (n=0
~255) the display picture after the white picture of grayscale value obtains the luminance matrix of display picture and is sent to luminance matrix data bright
Spend matrix acquiring unit.Brightness value is used to, according to the luminance matrix of display picture, obtain in n grayscale values with grayscale value acquiring unit
The brightness value of normal region in lower display picture, and obtain showing under n grayscale values each in bad display area in picture
The brightness value of a pixel, and record the coordinate data of each pixel in bad display area.Look-up table establishes unit use
Each pixel in brightness value and bad display area according to each n grayscale values, the corresponding normal region of each n grayscale values
Brightness value and the coordinate data of each pixel establish look-up table.
In one embodiment, above-mentioned look-up table reparation unit includes：Brightness value confirmation unit and grayscale value acquiring unit,
Brightness value confirmation unit obtains the brightness value of normal region and bad display under grayscale value in a lookup table for inputting grayscale value
The brightness value of pixel in region.Grayscale value acquiring unit is corresponding with input grayscale value for searching pixel in a lookup table
Normal region the equal brightness value of brightness value corresponding to grayscale value, grayscale value is the revised grayscale value of pixel.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, 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, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of restorative procedure of the bad display of display, which is characterized in that include the following steps：
The grayscale value of the corresponding each pixel of input picture is obtained, and confirms that each pixel position is according to look-up table
It is no in bad display area；
If pixel position in bad display area, judges the grayscale value of each pixel in the bad display area
Whether corresponding reparation value can be found in a lookup table；
If the grayscale value of the pixel in the bad display area can find corresponding reparation value in the look-up table, lead to
It crosses the look-up table to repair the pixel, obtains the revised grayscale value of the pixel；
If the grayscale value of the pixel in the bad display area cannot find corresponding reparation value in the look-up table,
By way of filtering, the pixel is repaired, obtains the revised grayscale value of the pixel；
If the grayscale value of the pixel in the bad display area cannot find corresponding reparation in the look-up table
Value, then by way of filtering, the step of being repaired to the pixel, obtain the revised grayscale value of the pixel
Including：
According to the look-up table, the brightness value of normal region corresponding with input grayscale value is searched, and obtains the pixel
Grayscale value corresponding to the brightness value of the brightness value difference minimum of normal region corresponding with the input grayscale value is the picture
The amendment grayscale value of vegetarian refreshments；
Centered on the pixel, the filter window (n is odd number) of n × n is selected, is calculated in filter window according to following formula
Filter factor a per ringi：
Wherein, a1<a2<…<ai；N is filter window size；I is that the annulus number of filter window indexes；J is the every of filter window
Ring number of pixels indexes；L` is the amendment grayscale value of pixel；AijFor the grayscale value of the pixel of corresponding position；
According to the filter factor a per ring in filter windowiCorrection factor a is calculatedi`, ai`=1-ai；
According to the correction factor ai` corrects the grayscale value of corresponding pixel points, and the amendment grayscale value of corresponding pixel points is the amendment
Coefficient aiThe product of ` and the pixel original gray-scale value；
The corresponding image of revised grayscale value is shown.
2. the restorative procedure of the bad display of display according to claim 1, which is characterized in that inputted in the acquisition
The grayscale value of the corresponding each pixel of image, and before the step of determining the bad display area in the input picture, also
Include the following steps：
The white picture of a n (n=0~255) grayscale value is inputted respectively to display, and the display is shot using brightness imager
Show picture, obtain it is described display picture luminance matrix, wherein the display picture include normal display area and it is bad show
Show region；
According to the luminance matrix of the display picture, the brightness value of the normal region in the display picture under n grayscale values is obtained,
And the brightness value of each pixel under n grayscale values in the display picture in bad display area is obtained, and record not
The coordinate data of each pixel in good display area；
According to each n grayscale values, the corresponding normal region of each n grayscale values brightness value and bad display area in each pixel
The brightness value of point and the coordinate data of each pixel establish look-up table.
3. the restorative procedure of the bad display of display according to claim 1, which is characterized in that if described bad
The grayscale value of pixel in display area can find corresponding reparation value in the look-up table, then pass through the look-up table pair
The pixel is repaired, and the step of obtaining the revised grayscale value of the pixel includes：
Grayscale value is inputted, the brightness value of normal region and the bad viewing area under the grayscale value are obtained in the look-up table
The brightness value of pixel in domain；
It is equal with the input corresponding brightness value of normal region of grayscale value that the pixel is searched in the look-up table
Grayscale value corresponding to brightness value, the grayscale value are the revised grayscale value of the pixel.
4. a kind of prosthetic device of the bad display of display, which is characterized in that including：
Acquiring unit, the grayscale value for obtaining the corresponding each pixel of input picture, and it is described every according to look-up table confirmation
Whether a pixel position is in bad display area；
Judging unit, for when pixel position is in bad display area, judging each in the bad display area
Whether the grayscale value of pixel can find corresponding reparation value in a lookup table；
Look-up table repairs unit, can be looked in the look-up table for the grayscale value when the pixel in the bad display area
When to corresponding reparation value, the pixel is repaired by the look-up table, obtains the revised of the pixel
Grayscale value；
Unit is repaired in filtering, and the filtering is repaired unit and is used for when the grayscale value of the pixel in the bad display area cannot
When finding corresponding reparation value in the look-up table, by way of filtering, the pixel is repaired, is obtained described
The revised grayscale value of pixel；And
Display unit, for showing the corresponding image of revised grayscale value；
Wherein, the filtering reparation unit includes：
Grayscale acquiring unit is corrected, for according to the look-up table, searching the brightness of normal region corresponding with input grayscale value
Value, and obtain the brightness value institute of the brightness value difference minimum of the normal region corresponding with the input grayscale value of the pixel
Corresponding grayscale value is the amendment grayscale value of the pixel；
Selecting unit, for centered on the pixel, selecting the filter window of n × n (n is odd number)；
First computing unit, for calculating the filter factor a in filter window per ring according to following formulai：
Wherein, a1<a2<…<ai；N is filter window size；I is that the annulus number of filter window indexes；J is the every of filter window
Ring number of pixels indexes；L` is the amendment grayscale value of pixel；AijFor the grayscale value of the pixel of corresponding position；
Second computing unit, for according to the filter factor a per ring in filter windowiCorrection factor a is calculatedi`：ai`=1-
ai；
Amending unit, for according to the correction factor ai` corrects the grayscale value of corresponding pixel points, the amendment ash of corresponding pixel points
Rank value is the correction factor aiThe product of ` and the pixel original gray-scale value.
5. the prosthetic device of the bad display of display according to claim 4, which is characterized in that further include：
Luminance matrix acquiring unit receives the brightness for the display picture that brightness imager is sent for being connect with brightness imager
Matrix data, the brightness imager are used to acquire the display picture after the display input white picture of n (n=0~255) grayscale value
Face obtains the luminance matrix of the display picture and luminance matrix data is sent to the luminance matrix acquiring unit；
Brightness value and grayscale value acquiring unit obtain described under n grayscale values for the luminance matrix according to the display picture
It shows the brightness value of normal region in picture, and obtains every in bad display area in the display picture under n grayscale values
The brightness value of one pixel, and record the coordinate data of each pixel in bad display area；
Look-up table establishes unit, for according to the brightness value of each n grayscale values, the corresponding normal region of each n grayscale values and bad aobvious
The coordinate data of the brightness value and each pixel that show each pixel in region establishes look-up table.
6. the prosthetic device of the bad display of display according to claim 4, which is characterized in that the look-up table reparation
Unit includes：
Brightness value confirmation unit obtains the bright of normal region under the grayscale value for inputting grayscale value in the look-up table
The brightness value of angle value and the pixel in the bad display area；
Grayscale value acquiring unit is corresponding with the input grayscale value normal for searching the pixel in the look-up table
Grayscale value corresponding to the equal brightness value of the brightness value in region, the grayscale value are the revised grayscale of the pixel
Value.
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| CN107799084B (en) * | 2017-11-21 | 2019-11-22 | 武汉华星光电半导体显示技术有限公司 | Device and method, the memory of luminance compensation |
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