CN104160439B - The uneven detection method of display of display device and its device - Google Patents
The uneven detection method of display of display device and its device Download PDFInfo
- Publication number
- CN104160439B CN104160439B CN201280071032.XA CN201280071032A CN104160439B CN 104160439 B CN104160439 B CN 104160439B CN 201280071032 A CN201280071032 A CN 201280071032A CN 104160439 B CN104160439 B CN 104160439B
- Authority
- CN
- China
- Prior art keywords
- mentioned
- uneven
- pixel
- pixel value
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/66—Transforming electric information into light information
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- 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
- G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
-
- 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
- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
- G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
-
- 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
- G09G2320/0693—Calibration of display systems
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
- G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
Abstract
Uneven with the display of higher accuracy detection display device.The output image data of the display image of the liquid crystal panel displays (3) getting from CCD camera (5) is addressed, obtains the pixel value of each pixel of liquid crystal panel displays (3), to obtain each differential pixel value.And, the differential pixel value of each pixel and uneven judgment threshold are compared, detection differential pixel value exceedes the neighbor group of uneven judgment threshold as the uneven generation region of display.Then, to calculate the uneven intensity of display according to the uneven region that produces of each display, its value is compared with uneven intensity threshold, in the case of exceeding uneven intensity threshold, it produces region detection the most at last is that display is uneven.Thereby, it is possible to disposably detect as the region showing uneven candidate, according to the region showing that the height of uneven intensity level goes out come lock-in detection, finally detect and be visually also substantially identified as showing that uneven display is uneven.Thus, compared with the differential pixel value obtaining each pixel according to output image data with the difference of input image data, can be uneven with the display of higher accuracy detection liquid crystal panel displays (3).
Description
Technical field
The present invention relates to a kind of uneven method being detected of display to display device and device.
Background technology
By the image image shown by display device being shot and by the view data photographing and display
Data is compared to detect display this technology uneven of display device, by using the school extrapolated based on this technology
The view data that positive content correction display is used eliminates and shows that on uneven be useful.In Japan Office's publication publication
Associated technology is disclosed in JP 2010-57149 publication, JP 2005-150349 publication.
Patent documentation 1：Japanese Unexamined Patent Publication 2010-57149 publication
Patent documentation 2：Japanese Unexamined Patent Publication 2005-150349 publication
Content of the invention
Problems to be solved by the invention
On the display of detection display device is uneven, the present inventor, in order to realize the raising further of accuracy of detection, grinds
Study carefully the specific analytical method of view data obtained from the image shown by display device is shot.In this process,
Understand that the specific analysis method of view data can bring impact to showing uneven accuracy of detection.The present invention be in view of
The problems referred to above and complete, it is an object of the invention to provide a kind of display with higher accuracy detection display device is uneven
Method and device.
For solution to problem
One mode of the present invention is a kind of uneven detection method of display of display device, comprises the following steps：
Pixel value obtaining step, output image number according to obtained from the image shown by display device is shot
According to obtaining the pixel value of each pixel of above-mentioned display device；
Differentiation step, obtains the differential pixel value of each pixel of above-mentioned display device；
Non-uniform areas detecting step, exceedes the uneven of regulation according to the above-mentioned differential pixel value of above-mentioned display device and sentences
The distribution of the pixel of disconnected threshold value, to detect the uneven generation region of above-mentioned display in above-mentioned display device；
Intensity level obtaining step, the above-mentioned pixel value according to each pixel belonging to above-mentioned generation region or above-mentioned differential picture
Element value, to obtain the uneven intensity level of display in above-mentioned generation region；And
Show uneven detecting step, detect that above-mentioned intensity level exceedes the above-mentioned generation area of the uneven intensity threshold of regulation
Domain is uneven as above-mentioned display.
In addition, another mode of the present invention is a kind of uneven detection means of display of display device, possess：
Pixel value acquiring unit, it will be each to output image data obtained from the image taking shown by display device
Pixel value is assigned to each pixel of above-mentioned display device, to obtain the pixel value of each pixel of above-mentioned display device；
Differentiation element, it obtains the differential pixel value of each pixel of above-mentioned display device；
Pixel value comparing unit, it is uneven with specify by the above-mentioned differential pixel value of each pixel of above-mentioned display device
Judgment threshold is compared；
Non-uniform areas detector unit, it exceedes the pixel of above-mentioned uneven judgment threshold according to above-mentioned differential pixel value
Distribution, to detect the uneven generation region of above-mentioned display in above-mentioned display device；
Intensity level acquiring unit, its basis belongs to the above-mentioned pixel value of each pixel in above-mentioned generation region or above-mentioned differential
Pixel value, to obtain the uneven intensity level of display in above-mentioned generation region；
Intensity level comparing unit, the uneven intensity threshold of above-mentioned intensity level and regulation is compared by it；And
Show uneven detector unit, it detects that above-mentioned intensity level exceedes the above-mentioned generation of the uneven intensity threshold of regulation
Region is uneven as above-mentioned display.
The effect of invention
According to a mode of the present invention, exceed the distribution of the pixel of uneven judgment threshold first according to differential pixel value
To detect the uneven generation region of display device.And, by the pixel value according to each generation region or differential pixel value
The generation region that the uneven intensity level of display in each generation region getting exceedes uneven intensity threshold is finally detected as showing
Show uneven.Therefore, first, will be to show uneven generation area as the region one-time detection showing uneven candidate
Domain.And, the generation region that lock-in detection goes out is come with the height showing uneven intensity level, thus finally detects in vision
On to be identified as uneven display uneven.Therefore, simply detect that with the distribution according to differential pixel value display is uneven
Even compare, can be uneven with the display of higher accuracy detection display device.
Brief description
Fig. 1 is to represent to detect display using the uneven detection means of the display involved by the first embodiment of the present invention
The explanatory diagram showing uneven state of equipment.
Fig. 2 is to represent that Fig. 1's shows the flow chart showing uneven detection process that uneven detection means is carried out.
Fig. 3 is the flow chart of the specific process of the differential process representing Fig. 2.
Fig. 4 is that the pixel of the left side near zone for liquid crystal panel displays represents the integration in the Integral Processing of Fig. 3
The explanatory diagram of the acquisition principle of pixel value.
Fig. 5 is that the pixel of the top near zone for liquid crystal panel displays represents the integration in the Integral Processing of Fig. 3
The explanatory diagram of the acquisition principle of pixel value.
Fig. 6 is in the Integral Processing representing Fig. 3 in the pixel of the upper left corner near zone of liquid crystal panel displays
The explanatory diagram of the acquisition principle of integrated pixel value.
Fig. 7 is the flow chart of the specific process of the differential process representing Fig. 2.
Fig. 8 is the explanatory diagram of the principle emphasizing to process representing Fig. 7.
(a), (b) of Fig. 9 is the output image data before local illustrates the differential process of liquid crystal panel displays of Fig. 1
Image and the explanatory diagram of each pixel value.
(a), (b) of Figure 10 is the output image data after local illustrates the differential process of liquid crystal panel displays of Fig. 1
Image and each pixel value explanatory diagram.
Figure 11 is to represent that the differential pixel value that Figure 10 (b) is illustrated exceedes the pixel of uneven judgment threshold and addition of mark
The explanatory diagram of the state of label value.
Figure 12 is to represent to obtain the uneven prospect (FG) producing in region of the required display of SEMU value and background (BG)
Position relationship explanatory diagram.
Figure 13 is the liquid crystal panel representing the testing result showing that uneven detection means is uneven to display using Fig. 1
The flow chart of the checking process of display.
Specific embodiment
Below, illustrate to apply the embodiment party of the uneven detection means of display of the uneven detection method of display of the present invention
Formula.The present invention shows that uneven detection means can inspection line (not shown) to be installed in the manufacturing process of display device
Deng online form constitute it is also possible to from checking that line etc. disconnects and independent unit form is constituted.
In addition, showing uneven display device, example as being detected by the uneven detection means of display of the present invention
As there is liquid crystal panel displays, plasma panel displays, organic el display etc..In the following embodiments, with aobvious
Show that equipment is to illustrate as a example liquid crystal panel displays.
As shown in figure 1, the uneven detection means of the display of present embodiment 1 is constituted with unit form, shine according to using CCD
Obtained from camera 5 shoots to images such as the test patterns shown by liquid crystal panel displays 3 (being equivalent to display device)
Output image data, to detect that the display of liquid crystal panel displays 3 is uneven.If there is no obstacle in disposal ability, show
Show that uneven detection means 1 for example can be made up of personal computer etc..
Show that uneven detection means 1 has CPU (central processor), RAM (random access memory), ROM (read-only
Memorizer), hard disk etc..CPU passes through the program that execution is stored in ROM or hard disk, to execute the display of liquid crystal panel displays 3
Uneven detection process.
As shown in Fig. 2 showing the uneven inspection of display of the liquid crystal panel displays 3 that carried out of uneven detection means 1
Survey to process and include at output image data acquisition process (step S1), addressing and Moire fringe removal process (step S3), differential
Reason (step S5), differential threshold decision (threshold decision, a binaryzation) process (step S7), uneven Strength co-mputation is processed
(step S9), uneven intensity threshold judge that (secondary threshold decision) processes (step S11) and result output processes (step
S13).
In the output image data acquisition process of step S1, for example, make liquid crystal panel displays 3 according to uneven from display
Even detection means 1 is supplied to the input image data of liquid crystal panel displays 3 to show the images such as test pattern, shows uneven
The signal of video signal from CCD camera 5 obtained by detection means 1 acquisition its display picture of shooting is as liquid crystal panel displays
3 output image data.
Here, it is even to there is the even irregular colour of brightness disproportionation during the display that produces in liquid crystal panel displays 3 is uneven,
In the uneven detection means of display 1 of present embodiment, even to the even irregular colour of brightness disproportionation all can detect.Cause
This, suitably change rgb value pattern in liquid crystal panel displays 3, to show and is suitable for the image of detection brightness irregularities, fits
Together in the image that detection irregular colour is even.And, show that uneven detection means 1 carries out showing based on procedure below to each image
Show uneven detection action.
In the addressing of step S3 is processed, each pixel of the ccd sensor of CCD camera 5 is assigned to liquid crystal panel and shows
Show each pixel of device 3, the pixel value carrying out each pixel according to the ccd sensor constituting output image data extrapolates liquid crystal surface
The pixel value of each pixel of panel display 3.
Additionally, in the case that display device is for organic EL panel display, plasma panel displays, also by one
Light-emitting component to be addressed to process as a pixel.
In addition, liquid crystal panel displays 3 and ccd sensor are respectively provided with, and pixel is configured to rectangular grid pattern.
And, CCD camera 5 has the pixel than liquid crystal panel displays more than 3, therefore receives by multiple pixels of CCD camera 5
Image light from a pixel of liquid crystal panel displays 3.Therefore, the pixel value of each pixel of liquid crystal panel displays 3 is for example
To be determined by pixel value highest pixel in multiple pixels of CCD camera 5 corresponding with this pixel.
Now, if CCD camera 5 has the pixel of the integral multiple of liquid crystal panel displays 3, the picture of CCD camera 5
Phase contrast is not produced between the pixel period of plain cycle and liquid crystal panel displays 3.Therefore, each in liquid crystal panel displays 3
In the case that pixel is lighted with identical pixel value, pixel value highest picture in the pixel of CCD camera 5 corresponding with each pixel
Element becomes mutual identical pixel value.Thus, the CCD obtained by the display image to liquid crystal panel displays 3 is shot
Moire fringe is not produced in the photographss of photographing unit 5.
But, when CCD camera 5 has the not pixel of the quantity of the integral multiple of liquid crystal panel displays 3, CCD shines
Phase contrast is produced between the pixel period of the pixel period of camera 5 and liquid crystal panel displays 3.Therefore, show in liquid crystal panel
In the case that each pixel of device 3 is lighted with identical pixel value, pixel value in the pixel of CCD camera 5 corresponding with each pixel
Highest pixel does not become mutual identical pixel value yet.Because this reason causes in the display figure to liquid crystal panel displays 3
Produce Moire fringe as in the photographss of CCD camera 5 obtained by being shot.
When directly the output image data from CCD camera 5 being used for liquid crystal in the state of comprising this Moire fringe
It is possible to lead to show uneven error detection during the uneven detection of display of panel display 3.
Therefore, in step s3, carry out Moire fringe removal process together with addressing process.Process in Moire fringe removal
In, such as the applicant makes ccd sensor using propose in the application involved by Japanese Unexamined Patent Publication 2004-317329 publication
Each pixel method of being added with the pixel value of its neighboring pixel or being equalized, to remove in output image data not
That striped composition.
Additionally, in the case that display device is for organic EL panel display, plasma panel displays, light-emitting component
It is also configured as rectangular grid pattern, therefore same Moire fringe is removed process and carry out being to have together with addressing process
Effect.But, Moire fringe remove process it is not necessary to, when detection display is uneven, the Moire fringe that produces is not make
Wait in the case of becoming the degree of obstacle and process it is also possible to omit Moire fringe removal.
In the differential process of step S5, after having carried out addressing process and Moire fringe removal process in step s3
The pixel value of each pixel of liquid crystal panel displays 3 carry out differential, to obtain differential pixel value.Can also be by being used for obtaining
Subject pixels to obtain this differential pixel value with the difference of pixel value of its neighboring pixel general differential process.
But, in the present embodiment, in the differential process of step S5, as shown in figure 3, carrying out liquid crystal panel displays
The emphasizing of 3 pixel value of each pixel process (step S51), Integral Processing (step S51) and liquid crystal panel displays 3 each
The pixel value of pixel and the difference processing (step S53) of integrated pixel value.
In the Integral Processing of step S51, it is addressed to process and More in step S3 of Fig. 2 using spatial filter
The pixel value of each pixel of liquid crystal panel displays 3 after striped removal is processed is averaged with the pixel value of neighboring pixel
To be integrated, thus obtaining integrated pixel value.
Spatial filter as used herein needs to have that to cover the display that liquid crystal panel displays 3 can be generated by uneven
Matrix shape.Therefore, the uneven corresponding kernel chi of display that spatial filter has with liquid crystal panel displays 3 can be generated by
Very little.For example, if showing the uneven size being possible to there are 100 × 100 amount of pixels being liquid crystal panel displays 3 to the maximum,
The spatial filter that then would be used for integrating also is set to 100 × 100 size of cores.By the way, the value of each kernel is
" 1 ", coefficient is the inverse (=1/ (100 × 100)) of interior check figure.
Additionally, when carrying out the Integral Processing of step S51 using spatial filter, when the subject pixels for integration
(the acquisition subject pixels of integrated pixel value) close to any one of neighboring up and down of liquid crystal panel displays 3 when,
A part of kernel row of spatial filter spill into the outside of liquid crystal panel displays 3.
Here, with reference to Fig. 4 and Fig. 5, (uneven with the display of display device with the spatial filter 40 using integration
The spatial filter of the corresponding size of cores of shapes and sizes) pixel value of each pixel of liquid crystal panel displays 3 is amassed
To illustrate in case of point.Additionally, in example described herein, such as the rightmost of Fig. 4, the bottom of Fig. 5 distinguish table
The size of cores of spatial filter 40 like that, is schematically set to 7 × 7 by the sample showing.This spatial filter 40 is by each kernel
Value is set to " 1 ", the coefficient of each kernel is set to the inverse (=1/ (7 × 7)) of all interior check figures.
First, in fig. 4 it is shown that spatial filter 40 with respect to the left side 31 of liquid crystal panel displays 3 position relationship
Relation and effective kernel row between.In this example, by spatial filter 40 to from the left side 31 to the 3rd pixel it is being
When pixel only is integrated (with reference to Fig. 4 from top the example to the 3rd), the left side of spatial filter 40
Kernel row (1 row～3 row) are crossed the left side 31 of liquid crystal panel displays 3 and are spilt into outside.
There is not corresponding pixel column in spilling into the kernel in outside of liquid crystal panel displays 3 row, therefore in integration
Need during process to make this kernel row invalid.Therefore, by the kernel row spilling into the spatial filter 40 in the outside on the left side 31
Core is set to invalid (kernel value=" 0 ").
In addition, (joining when being integrated to the pixel after the from the left side 31 the 4th pixel by spatial filter 40
According to Fig. 4 from top the 4th later example), spatial filter 40 is generally in the inner side of liquid crystal panel displays 3.?
In the case of being somebody's turn to do, pixel corresponding with whole kernels is respectively present, and does not therefore need in principle to be set to invalid kernel (arranging).
Additionally, being shown to being present in liquid crystal panel using the spatial filter 40 that Fig. 4 is carried out the content that left and right reversion obtains
Show that the Integrating pixel in the near zone on the right of device 3 is integrated processing.
As shown in figure 5, in spatial filter 40 in the case of the top 35 of liquid crystal panel displays 3 it is also possible to
Carry out action sample.That is, (with reference to Fig. 5 in the case that Integrating pixel is in from top 35 to the 3rd pixel
The example from right to the 3rd), (1 row～3 row cross liquid crystal panel to the kernel of the upside of spatial filter 40 row
The top 35 of display 3 and spill into outside.Therefore, the kernel spilling into the spatial filter 40 in the outside of top 35 is arranged
Kernel is set to invalid (kernel value=" 0 ").
In addition, (with reference to Fig. 5 from right in the case of being after the 4th pixel from top 35 in Integrating pixel
Play the example of the 4th～leftmost side), spatial filter 40 generally in the inner side of liquid crystal panel displays 3, therefore in principle
Do not need to be set to invalid kernel (arranging) in spatial filter 40.
Additionally, being shown to being present in liquid crystal panel using the spatial filter 40 that Fig. 5 is inverted up and down the content obtaining
Show that the Integrating pixel in the following near zone of device 3 is integrated processing.
In addition, in the liquid crystal panel displays 3 using backlight, particularly in the periphery edge of picture configuration light source simultaneously
In the case of the guide-lighting central authorities to picture of light guide plate, because light is decayed in light guide plate, and easily produce the bright of picture central authorities
Spend relatively low skin dark stain compared with the brightness near the neighboring of picture.Show in plasma panel displays, organic EL panel
Show that device etc. does not use in the display device of backlight and also can produce this skin dark stain.
Therefore, in the present embodiment, it is in Integrating pixel near the neighboring of liquid crystal panel displays 3
When, make spatial filter 40 have directivity with the bearing of trend identical direction on side nearby, reduce the extension with this side
The sensitivity in the orthogonal direction in direction, to carry out skin dark stain correction to integrated pixel value.
For example be set near the left side 31 of the liquid crystal panel displays 3 shown in Fig. 4, from the left side 31 to sensitivity school
Skin dark stain is easily produced in the near zone 33 on the left side 31 of whole seven pixel wide till main track 32.In this case, exist
When being present near zone 33 by the subject pixels that spatial filter 40 is integrated, spatial filter 40 is made to have to the left side
The directivity of 31 bearing of trend.And, the effective kernel row in the direction (horizontal) orthogonal with the left side 31 are set to 3 in principle
Row, size of cores is set to indulge × horizontal stroke=7 × 3.
But, in the example of the top of Fig. 4, it is superimposed upon the left side of the central Integrating pixel of spatial filter 40
Wanting in adjacent pixel is set to effective kernel and arranges overflow laterally from the left side 31 of spatial filter 40, therefore, exception
Ground, effective size of cores is set to indulge × horizontal stroke=7 × 2.
Similarly, be set near the top 35 of the liquid crystal panel displays 3 shown in Fig. 5, from top 35 to sensitive
Skin dark stain is easily produced in the near zone 37 of the top 35 of whole seven pixel wide till degree compensation line 36.In this situation
Under, when the subject pixels being integrated by spatial filter 40 are present near zone 37, so that spatial filter 40 is had
Directivity to the bearing of trend of top 35.And, by the effective kernel row principle in the direction (longitudinal) orthogonal with top 35
On be set to 3 row, size of cores is set to indulge × horizontal=3 × 7.
But, in the example of the rightmost of Fig. 5, it is superimposed upon wanting in the adjacent pixel in upside of Integrating pixel
It is set to effective kernel and arranges overflow laterally from the top 35 of spatial filter 40, therefore, exceptionally, by effective size of cores
It is set to indulge × horizontal stroke=2 × 7.
In addition, the right from liquid crystal panel displays 3 whole seven to sensitivity compensation line (not shown)
In the case of easily producing skin dark stain in Integrating pixel in the near zone being present in the right of pixel wide, using will scheme
4 carry out the spatial filter 40 of the content obtained by the reversion of left and right being integrated processing.Similarly, from liquid crystal panel
Following whole seven pixel wide rising to sensitivity compensation line (not shown) of display 3 be present in following vicinity
In the case of easily producing skin dark stain in Integrating pixel in region, using the content obtained by being inverted Fig. 5 up and down
Spatial filter 40 being integrated processing.
So, for the Integrating pixel near the neighboring of liquid crystal panel displays 3, can by using have to
Be set to indulge close to the directivity of the bearing of trend on the side of spatial filter 40 that used and by effective size of cores × horizontal=
7 × 2 or 2 × 7,7 × 3 or 3 × 7 spatial filter 40, to be integrated in the pixel value to Integrating pixel
Carry out skin dark stain correction simultaneously.
Additionally, being present in, in Integrating pixel, the inner side that specific sensitivity compensation line 32,36 more leans on liquid crystal panel displays 3
When, the effective size of cores being used for the spatial filter 40 of the integration of this pixel can be set to 7 × 7 in principle.But, just
Move on in liquid crystal panel displays 3 when Integrating pixel crosses sensitivity correction line 32,36 near zone 33,37
When side, when vertical × horizontal stroke=7 × 3 or 3 × 7 are changed into 7 × 7, integration is special for the effective size of cores of spatial filter 40
Impatient drastic change, therefore and not preferred.
Accordingly it is also possible to the Integrating pixel more in the inner part than near zone 33,37 be in sensitivity correction line 32,
When near 36, turn to vertical with away near zone 33,37, making the effective size of cores of spatial filter 40 slowly become
× horizontal=7 × 5 or 5 × 7,7 × 7.
In addition, the size of cores of above-mentioned vertical × horizontal stroke=7 × 7 is one in explanation all the time, the kernel chi of spatial filter
As long as the uneven corresponding size of display very little and that liquid crystal panel displays 3 can be generated by, then it is arbitrary.And, with regard to
Spatial filter used in the integration of the Integrating pixel of the neighboring close to liquid crystal panel displays 3, such as Fig. 4 and Tu
Like that, effective kernel columns in the direction orthogonal with the bearing of trend on side nearby is set to can for spatial filter 40 shown in 5
Become, make sensitivity have directivity.
For example, in the case that there is 15 × 15 size of cores in spatial filter, with Integrating pixel away from attached
Near field 33,37, can make effective size of cores of spatial filter from vertical × horizontal=15 × 3 or 3 × 15 via multiple
Stage become successively turn to 15 × 5 or 5 × 15,15 × 7 or 7 × 15,15 × 9 or 9 × 15,15 × 11 or 11 × 15,
15 × 13 or 13 × 15,15 × 15.
Additionally, the space filtering in the case of without the concern for the correction of above-mentioned skin dark stain it is also possible to as shown in Fig. 4 and Fig. 5
Device 40 like that, makes identical with the kernel row of the periphery avris of the liquid crystal panel displays 3 being set to invalid kernel or interior close to this
Also ineffective treatment in the kernel row of the center side in liquid crystal panel displays 3 for the kernel of the columns of core row.If set to this spline structure,
The space filtering on the direction orthogonal with the left side 31 of liquid crystal panel displays 3, top 35 (or the right, following) then can be made
The directivity (sensitivity) of device 40 is impartial for Integrating pixel.That is, without the concern for skin dark stain timing, in liquid crystal panel
Whether the center side of display 3 also sets invalid kernel row is arbitrary.
In addition, for example shown in Fig. 6, in the corner of liquid crystal panel displays 3, two neighbouring areas of the left side 31 and top 35
Domain 33,37 is overlapping.Therefore, when nearby there is Integrating pixel in the region 39 of region 33,37 overlaps, add up to and use Fig. 4
With the kernel row of the respectively ineffective treatment of the spatial filter 40 shown in Fig. 5, and by the left and right of spatial filter 40 and upper and lower each
It is invalid that the kernel of 2～3 row in direction is set to.In this case, also without the concern for skin dark stain timing, if in liquid crystal
It is arbitrary that the center side of panel display 3 also sets invalid kernel row in machine and transverse direction respectively.
In addition, in the display of liquid crystal panel displays 3 is uneven, both existed and be respectively provided with certain in both direction in length and breadth
The display of the size of degree is uneven, there is also the uneven of the little wire of longitudinal or horizontal size.With in length and breadth two
Have on direction size to a certain degree display uneven compare, the uneven uneven scope (area) of wire is little, therefore
Drawn and integrated pixel value step-down by the pixel value of neighboring pixel when being integrated processing, exist and be difficult to be detected as display not
Uniform trend.
Accordingly it is also possible to the Fig. 2 carrying out when detecting to longitudinally or transversely the little wire of size is uneven
In the differential process of step S5, as shown in fig. 7, execute the Integral Processing of step S51 of Fig. 3 and the difference of step S53 similarly
Before the reason of office, it is emphasized as pretreatment processing (step S50).
Step S50 emphasize process in, make the uneven pixel value of longitudinal or horizontal wire uneven in wire
Bearing of trend on equalization and reduce noise contribution.Fig. 8 illustrate uneven to the wire extending in the vertical be emphasized locate
The situation of reason.In this case, identical there is directivity (being arranged effective kernel) in the vertical using uneven with wire
Emphasize process spatial filter 50 (emphasizing to use spatial filter).This spatial filter 50 is in the size of cores of n × n
Only vertical 1 row of its lateral center are set to effective kernel (kernel value=" 1 "), by other be set to invalid kernel (kernel value=
“0”).The coefficient of effectively kernel is the inverse (=1/n) of effectively interior check figure n.Additionally, figure 8 illustrates the situation of n=9.
The wire in step S50 employing Fig. 7 of this spatial filter 50 uneven emphasize process in, wire is not
The pixel value of uniform parts is averaged with the pixel value with longitudinal effectively interior check figure n identical neighboring pixel.Thus, make
The border of the uneven longitudinal direction of wire is made clear, is easily detected as showing uneven.
Additionally, uneven the emphasizing in process of wire extending in the horizontal, directive strong using having in the horizontal
Mediate the spatial filter (not shown) of reason.In addition, for the intensive spot defect in point-like ground, being emphasized by carrying out this
Processing makes pixel value and the pixel value of neighboring pixel matchingly decline, therefore, it is difficult to being erroneously detected as showing uneven.
Step S50 carrying out described above emphasize process in the case of, using emphasize process after liquid crystal panel show
Show the Integral Processing to carry out step S51 of Fig. 7 for the pixel value of each pixel of device 3, thus obtaining integrated pixel value.Can also be
When carrying out this Integral Processing, as with reference to Fig. 4 and Fig. 5 explanation, according to Integrating pixel and liquid crystal panel displays 3
The position relationship of neighboring makes a part of kernel row ineffective treatment of spatial filter 50.
Then, in the difference processing of step S53 of Fig. 3, Fig. 7, obtain the liquid before carrying out the Integral Processing of step S51
The difference of the integrated pixel value after the pixel value of each pixel of crystal face panel display 3 and the Integral Processing of step S51, obtains this difference
It is allocated as the differential pixel value of each pixel for liquid crystal panel displays 3.As described above, terminating the differential process of step S5 of Fig. 2.
Additionally, before two shown in the side of step S51 of Fig. 3 chart illustrates the Integral Processing of step S51 and after processing
Certain horizontal a line of liquid crystal panel displays 3 in pixel Distribution value.It is known that working as after this two charts are compared
During the Integral Processing of step S51 carrying out Fig. 3, Fig. 7, extract the low-frequency component of the pixel value changes of liquid crystal panel displays 3.?
In the case that the pixel of liquid crystal panel displays 3 integrally occurs the skew of pixel value, comprise this in the low-frequency component extracting inclined
Shifting amount.
In addition, the liquid crystal panel after the chart shown in the side of step S53 of Fig. 3 illustrates the difference processing of step S53 shows
Show the pixel Distribution value in certain horizontal a line of device 3.It is known that working as the step carrying out above-mentioned Fig. 3, Fig. 7 after observing this chart
During the difference processing of S53, only extract the high frequency eliminating obtained by low-frequency component from the pixel value changes of liquid crystal panel displays 3
Composition.In the case that the pixel of liquid crystal panel displays 3 integrally occurs the skew of pixel value, side-play amount also serves as low-frequency component
And be excluded.
Thus, in the differential process of step S5 of Fig. 2, by carrying out step S51 of above-mentioned Fig. 3, Fig. 7, step S53
At Integral Processing, difference processing, with the difference carrying out the pixel value obtaining subject pixels and its neighboring pixel general differential
The situation of reason is compared, and can accurately detect by showing the uneven gap that there is pixel value and neighboring pixel between that causes
The region of the pixel of liquid crystal panel displays 3.
In addition, in the Integral Processing of step S51 of Fig. 3, processing and More to having carried out addressing in step S3 of Fig. 2
The pixel value of each pixel of liquid crystal panel displays 3 after striped removal process is integrated.On the other hand, in the step of Fig. 7
In the Integral Processing of rapid S51, the pixel value of each pixel of the liquid crystal panel displays 3 emphasized after process of step S50 is entered
Row integration.That is, even identical Integral Processing, for the pixel value of each pixel of the liquid crystal panel displays 3 of Integral Processing
The Integral Processing of the Integral Processing of step S51 of Fig. 3 and step S51 of Fig. 7 is also different.
Therefore, the uneven and longitudinal or horizontal of size to a certain degree will be had on both direction in length and breadth
Wire is uneven be all detected as showing uneven in the case of, need to carry out respectively differential process of process based on Fig. 3 and
The differential process of the process based on Fig. 7.In this case, the differential process of the process based on Fig. 3 are sequentially or in parallel carried out
And the differential process of the process based on Fig. 7.
Here, liquid crystal panel displays 3 before and after the differential process of step S5 of Fig. 2 to be described with reference to Fig. 9 and Figure 10
The image of output image data and pixel value.
First, it is set in the output image data of the liquid crystal panel displays 3 before the differential process of step S5 of Fig. 2
The display that there is the image that (a) of Fig. 9 illustrates is uneven.The pixel value of the corresponding pixel of liquid crystal panel displays 3 now
(b) for Fig. 9 such value.Additionally, for ease of explanation, in (b) of Fig. 9, not using each value of RGB, but use will
Represent that the deep or light brightness of picture is standardized obtained value (meansigma methodss=100) to represent the pixel value of each pixel.
Therefore, when the pixel value that (b) to Fig. 9 illustrates implements the differential process of step S5 of Fig. 2, such as (b) of Figure 10
Shown, the pixel value that only pixel value is higher than average pixel is 1000, and the pixel value of other pixels is 0.When by this situation shadow
During as representing, such as shown in (a) of Figure 10, show that (a) that the uneven poor contrast with its periphery goes above Fig. 9 illustrates micro-
Poor contrast before the reason of office, display is uneven to be made apparent from.
Then, in the differential threshold decision (threshold decision) of step S7 of Fig. 2 is processed, such as (b) of Figure 10 is shown
The pixel value that goes out, i.e. the differential pixel value of each pixel of liquid crystal panel displays 3 and uneven judgment threshold be compared to into
Row binaryzation.Uneven judgment threshold is for determining whether that according to differential pixel value having of liquid crystal panel displays 3 can
The threshold value of the pixel in the uneven region of display (showing uneven generation region) can be produced.
And, as shown in figure 11, differential pixel value is exceeded with the pixel distribution label value of uneven judgment threshold, to differential
Pixel value is pixel distribution " 0 " of below uneven judgment threshold.Label value is will be adjacent for the pixel exceeding uneven judgment threshold
It is uniquely attached that the aggregation connecing comes the generation region uneven to each display as a uneven generation region of display
Plus value.Thus, the pixel that produce region in uneven to same display distributes identical label value.Additionally, for label
Value uses the integer of more than " 1 ".
Then, during the uneven Strength co-mputation in step S9 of Fig. 2 is processed, for the uneven generation region of each display
Calculate the uneven intensity of display.For showing uneven intensity, for example can use will be by Semiconductor
Equipment and Materials International (semiconductor equipment and material structure) (SEMI, registrar
Mark) SEMU (SEMI MURA) value after standardization.Here, the computational methods of explanation SEMU value.
The calculating of SEMU value needs show the product that the uneven average contrast Cx in generation region, display are uneven
The perception limit of the area Sx in raw region and people show uneven concentration C jnd.Average contrast Cx is that display is uneven
The brightness of the neighboring pixel in even generation region is set to the uneven generation of the display being expressed as a percentage in the case of 100%
The brightness (average brightness of pixel in region) in region.Use mm2Represent area Sx.With showing the face in uneven generation region
The function F (Sx) of long-pending Sx concentration C jnd uneven to represent the display perceiving limit.
When for showing that above-mentioned average contrast Cx is obtained in uneven each generation region, need each generation region is set
Determine prospect (Fore Ground：) and background (Back Ground FG：BG).For example illustrate in (a) of Fig. 9 and (a) of Figure 10
In the case of the uneven generation region of display of shape, as shown in figure 12, show that uneven generation region becomes FG, from FG
Become BG across the annular section of two pixel wide of periphery of two pixels.Therefore, for belonging to each pixel of FG and belong to
Each pixel of BG obtains average brightness value respectively, is set to FG value and BG value.
Then, using following formula (1), average contrast Cx is obtained according to FG value and BG value,
Cx=(FG value-BG value)/BG value (1).
In addition, obtain uneven concentration C jnd of display of perception limit using following formula (2),
Cjnd=F (Sx)=1.97 × (1/Sx0.33)+0.72···(2).
Then, obtain SEMU value using following formula (3),
SEMU value=| Cx |/Cjnd (3).
As described above, using average contrast Cx, area Sx it is therefore desirable to know that display is uneven in the calculating of SEMU value
The correct shape in even generation region.According to this point it is also possible to from according to SEMU value calculate uneven intensity object
Exclusion determines that by carrying out the emphasizing to process of step S50 of Fig. 7 the wire in the uneven generation region of display is uneven.Its reason
By being, in the case that wire is uneven, it is identified as showing shape the emphasizing due to prime in uneven generation region
Process and be possible to, from the uneven shape of original wire, some changes occur.
And, in the uneven intensity threshold of step S11 of Fig. 2 judges that (secondary threshold decision) is processed, will be in step
The value (SEMU value) showing the uneven uneven intensity in generation region calculating in S9 is compared with intensity threshold.By force
Degree threshold value is the generation area judging for the value according to uneven intensity to be finally detected as showing that uneven display is uneven
The threshold value in domain.This intensity threshold is set as being detected as showing the minimum uneven of the uneven generation region of uneven display
Intensity level.
And, the uneven generation region detection of display that uneven intensity level is exceeded intensity threshold is that display is uneven
Even.On the other hand, not by generation region detection uneven less than the display of intensity threshold for uneven intensity level for display not
Uniformly.During the uneven last result output in step S13 of display detecting is processed, with the picture in liquid crystal panel displays 3
Plain position and uneven intensity level are associated, and are used as showing uneven testing result information and to be output to display uneven
The outside of detection means 1.
The uneven detection process of display of the liquid crystal panel displays 3 being carried out by the uneven detection means 1 of display above
Full content.And, in the present embodiment, step S3 in the flow chart of Fig. 2 becomes and the pixel value in claim
Acquiring unit (pixel value obtaining step) corresponding process.In addition, in the present embodiment, step S5 in Fig. 2 becomes and power
The corresponding process of differentiation element (differentiation step) in profit requirement, step S7 in Fig. 2 becomes and the pixel value in claim
Comparing unit and the corresponding process of non-uniform areas detector unit (area detection step).
And, in the present embodiment, step S9 in Fig. 2 becomes and intensity level acquiring unit (intensity level obtaining step)
Corresponding process, step S11 in Fig. 2 becomes and the intensity level comparing unit in claim and the uneven detector unit of display
(showing uneven detecting step) corresponding process.
In addition, in the present embodiment, step S50 in the flow chart of Fig. 7 becomes and the emphasizing unit in claim
(emphasizing step) corresponding process.And, in the present embodiment, step S51 in the flow chart of Fig. 3 and Fig. 7 becomes and power
Profit require in the corresponding process of integral unit (integration step), step S53 in Fig. 3 and Fig. 7 become with claim in
The corresponding process of difference unit (differentiation step).
Additionally, showing that the uneven testing result information of display that uneven detection means 1 is exported for example can utilize
In liquid crystal panel displays 3 according to each display is the presence or absence of uneven, its content and generate the elimination that storage keeps show uneven
Correction data for input image data.Particularly, if the uneven detection means 1 of display is set in the way of online
It is placed in the inspection line etc. that dispatches from the factory of liquid crystal panel displays 3, then display uneven detection operation can be made to cooperate with operation in front and back.
In this case, unified management is dispatched from the factory and is checked controller (not shown), each operation on management line respectively of line
Cell controller (not shown, with regard to showing uneven detection operation, show that uneven detection means 1 is equivalent to this unit and controls
Device) execution procedure below.
I.e., as shown in figure 13, in step S101, carry out the display uneven detection dress of the flow chart explanation with reference to Fig. 2
Put the 1 uneven detection process of display, the detection uneven then according to showing display that uneven detection means 1 is exported
Object information shows uneven (step S103) to detect whether to exist.Do not exist display uneven in the case of (step
S103："No"), it is judged as certified products, terminate the inspection operation relevant with the liquid crystal panel displays 3 of check object.
On the other hand, (step S103 in the case that presence display is uneven："Yes"), would indicate that the uneven detection of display
Device 1 detects the output times of inspection result information of the uneven meaning of display and sets for this liquid crystal panel displays 3
Determine number of times and be compared (step S105).Then, (step S105 in the case that output times exceed set point number："Yes"),
It is judged as substandard products, terminate the inspection operation relevant with the liquid crystal panel displays 3 of check object.
On the other hand, the output times showing uneven this testing result information are being detected not less than set point number
In the case of (step S105："No"), carry out for eliminating uneven being directed to of display showing that uneven detection means 1 detects
The generation of the correction data of input image data processes (step S107).
Dispatch from the factory and check that the cell controller that the correction data signal generating unit (not shown) of line has executes correction data
Generation is processed.By cell controller the drive circuit being built in liquid crystal panel displays 3 flash memory (not shown)
In new write or cover update generated correction data.If this correction data is suitable content, input is being schemed
During as data input to drive circuit, using the correction data reading from flash memory, counteracting is applied to input image data aobvious
Show uneven correction, eliminate display from the display picture of liquid crystal panel displays 3 uneven.
Then, after the generation of the correction data of step S107 is processed, again return to step S101, carry out reference picture
What the uneven detection means 1 of display of 2 flow chart explanation was carried out shows uneven detection process.Thus, even if will show
Show that the renewal of the correction data of uneven detection process and liquid crystal panel displays 3 is repeated set point number, also in display
In the case that uneven detection means 1 continues to detect that display is uneven, this liquid crystal panel displays 3 is judged as substandard products.
As described above, the uneven detection means of display 1 according to present embodiment, is obtaining from CCD camera 5
Each pixel of liquid crystal panel displays 3 is obtained in the output image data of the display image of liquid crystal panel displays 3 got
Pixel value, is obtained differential pixel value further, and is compared with uneven judgment threshold.Then, differential pixel value is surpassed
The neighbor cluster crossing uneven judgment threshold is first detected as showing uneven generation region.
Then, show that uneven each produces region and calculate the uneven intensity of display for each, by its value and inequality
Even intensity threshold is compared, and in the case of exceeding uneven intensity threshold, this generation region is finally detected as display not
Uniformly.
Therefore, first, will be to show uneven generation region as the region one-time detection showing uneven candidate.
Then, the generation region that lock-in detection goes out is come with the height showing uneven intensity level, thus finally detect visually
Also clearly showing that of being identified is uneven.Therefore, simply detect the uneven phase of display with the distribution from differential pixel value
Ratio can be uneven with the display of higher accuracy detection liquid crystal panel displays 3.
In addition it is also possible to omit to detect wire uneven and the differential by the flow chart of the Fig. 7 comprising to emphasize to process
Process the structure carrying out together with the differential process of the flow chart of Fig. 3.Step S51 alternatively, it is also possible to be omitted in Fig. 3, Fig. 7
According to the neighboring of Integrating pixel and liquid crystal panel displays 3 as with reference to Fig. 4 and Fig. 5 explanation during Integral Processing
Position relationship makes the structure of a part of kernel row ineffective treatment of spatial filter 50.And, can also be with the value beyond SEMU value
The intensity uneven to evaluate display.
Then, as stated in the beginning, the uneven detection method of display of the present invention and the display inequality applying the method
Even detection means except the uneven detection of the display that is used in above-mentioned embodiment the liquid crystal panel displays 3 of explanation with
Outer it is also possible to the uneven detection of the display that is used in the display devices such as plasma panel displays, organic el display.
Industrial applicability
Can extensively apply when the display detecting display device by image procossing is uneven.
Description of reference numerals
1：Show uneven detection means；3：Liquid crystal panel displays；5：CCD camera；31：The left side；32、36：Sensitive
Degree compensation line；33、37：Near zone；35：Top；39：Region；40、50：Spatial filter.
Claims (8)
1. a kind of uneven detection method of the display of display device, comprises the following steps：
Pixel value obtaining step, output image data according to obtained from the image shown by display device is shot, come
Obtain the pixel value of each pixel of above-mentioned display device；
Differentiation step, obtains the differential pixel value of each pixel of above-mentioned display device；
Non-uniform areas detecting step, exceedes the uneven judgement threshold of regulation according to the above-mentioned differential pixel value of above-mentioned display device
The distribution of the pixel of value, to detect the uneven generation region of display in above-mentioned display device；
Intensity level obtaining step, the above-mentioned pixel value according to each pixel belonging to above-mentioned generation region or above-mentioned differential pixel
Value, to obtain the uneven intensity level of display in above-mentioned generation region；And
Show uneven detecting step, detect that above-mentioned intensity level exceedes the above-mentioned generation region of the uneven intensity threshold of regulation,
And the above-mentioned generation region that detected above-mentioned intensity level exceedes the uneven intensity threshold of regulation is as above-mentioned display
Uneven.
2. the uneven detection method of the display of display device according to claim 1 it is characterised in that
It is also equipped with emphasizing step, emphasizes in step at this, be used in the uneven extension side of the above-mentioned display as detection object
Have upwards and directive emphasize to use spatial filter, by the periphery of each pixel value of above-mentioned display device and above-mentioned bearing of trend
The pixel value of pixel averages,
In above-mentioned differentiation step, for by above-mentioned emphasize step average after above-mentioned display device each pixel
Pixel value obtains above-mentioned differential pixel value.
3. the uneven detection method of the display of display device according to claim 1 and 2 is it is characterised in that above-mentioned differential
Step comprises the following steps：
Integration step, by using the sky of the shapes and sizes corresponding size of cores uneven with the display of above-mentioned display device
Between wave filter the pixel value of each pixel value of above-mentioned display device and neighboring pixel is averaged to be integrated, in acquisition
State the integrated pixel value of each pixel of display device；And
Differentiation step, the above-mentioned pixel value of each pixel according to above-mentioned display device is obtained with the difference of above-mentioned integrated pixel value
The differential pixel value of each pixel of above-mentioned display device.
4. the uneven detection method of the display of display device according to claim 3 it is characterised in that
Appointing in the near zone of each neighboring that the acquisition subject pixels of above-mentioned integrated pixel value belong to above-mentioned display device
In the case of one region, in above-mentioned integration step, using reducing and the near zone institute belonging to above-mentioned acquisition subject pixels
The above-mentioned spatial filter of the orthogonal sensitivity in direction of the bearing of trend on corresponding side, the pixel to above-mentioned acquisition subject pixels
Value is integrated.
5. a kind of uneven detection means of the display of display device, possesses：
Pixel value acquiring unit, its image shown by display device will be shot obtained from output image data each
Pixel value is assigned to each pixel of above-mentioned display device, to obtain the pixel value of each pixel of above-mentioned display device；
Differentiation element, it obtains the differential pixel value of each pixel of above-mentioned display device；
Pixel value comparing unit, its by the above-mentioned differential pixel value of each pixel of above-mentioned display device with regulation uneven judgement
Threshold value is compared；
Non-uniform areas detector unit, it exceedes dividing of the pixel of above-mentioned uneven judgment threshold according to above-mentioned differential pixel value
Cloth, to detect the uneven generation region of display in above-mentioned display device；
Intensity level acquiring unit, its basis belongs to the above-mentioned pixel value of each pixel in above-mentioned generation region or above-mentioned differential pixel
Value, to obtain the uneven intensity level of display in above-mentioned generation region；
Intensity level comparing unit, the uneven intensity threshold of above-mentioned intensity level and regulation is compared by it；And
Show uneven detector unit, it detects that above-mentioned intensity level exceedes the above-mentioned generation area of the uneven intensity threshold of regulation
Domain, and detected above-mentioned intensity level is exceeded the above-mentioned generation region of the uneven intensity threshold of regulation as above-mentioned aobvious
Show uneven.
6. the uneven detection means of the display of display device according to claim 5 it is characterised in that
It is also equipped with emphasizing unit, this emphasizing unit is used tool on the uneven bearing of trend of the above-mentioned display as detection object
Directive emphasize to use spatial filter, by the neighboring pixel of each pixel value of above-mentioned display device and above-mentioned bearing of trend
Pixel value averages,
Above-mentioned differentiation element is directed to the pixel of each pixel of above-mentioned display device after averaging by above-mentioned emphasizing unit
Value obtains above-mentioned differential pixel value.
7. the uneven detection means of the display of the display device according to claim 5 or 6 is it is characterised in that above-mentioned differential
Unit possesses：
Integral unit, it is by using the shapes and sizes corresponding size of cores uneven with the display of above-mentioned display device
The pixel value of each pixel value of above-mentioned display device and neighboring pixel is averaged to be integrated by spatial filter, obtains
The integrated pixel value of each pixel of above-mentioned display device；And
Difference unit, the above-mentioned pixel value of its each pixel according to above-mentioned display device is obtained with the difference of above-mentioned integrated pixel value
Take the differential pixel value of each pixel of above-mentioned display device.
8. the uneven detection means of the display of display device according to claim 7 it is characterised in that
Above-mentioned integral unit above-mentioned integrated pixel value acquisition subject pixels belong to above-mentioned display device each neighboring attached
In the case of any region near field, using reduce with corresponding to the near zone belonging to above-mentioned acquisition subject pixels
The above-mentioned spatial filter of the orthogonal sensitivity in direction of the bearing of trend on side, is carried out to the pixel value of above-mentioned acquisition subject pixels
Integration.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/055273 WO2013128617A1 (en) | 2012-03-01 | 2012-03-01 | Display unevenness detection method and device for display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104160439A CN104160439A (en) | 2014-11-19 |
| CN104160439B true CN104160439B (en) | 2017-03-01 |
Family
ID=49081861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280071032.XA Active CN104160439B (en) | 2012-03-01 | 2012-03-01 | The uneven detection method of display of display device and its device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6041858B2 (en) |
| KR (1) | KR101640118B1 (en) |
| CN (1) | CN104160439B (en) |
| TW (1) | TWI501626B (en) |
| WO (1) | WO2013128617A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013128616A1 (en) * | 2012-03-01 | 2013-09-06 | 株式会社日本マイクロニクス | Display unevenness detection method and device for display device |
| EP3264402A4 (en) * | 2015-03-20 | 2018-01-17 | Huawei Technologies Co., Ltd. | Method for correcting screen asymmetry and device and system thereof |
| CN106231295A (en) * | 2016-08-04 | 2016-12-14 | 惠州市德赛西威汽车电子股份有限公司 | A kind of display screen image quality automatic checkout system, detection method and application thereof |
| KR101796497B1 (en) * | 2016-09-12 | 2017-11-14 | (주)코텍 | Apparatus and method for designing light guiding plate pattern |
| TW201822709A (en) * | 2016-12-30 | 2018-07-01 | 曦威科技股份有限公司 | Real-time heart rate detection method and real-time heart rate detection system therefor |
| CN108281120B (en) * | 2018-01-27 | 2020-04-10 | 深圳市华星光电半导体显示技术有限公司 | Mura repairing method of display panel |
| CN110782829A (en) * | 2018-07-30 | 2020-02-11 | 联士光电（深圳）有限公司 | Micro-LED light field uniformity modulation method |
| CN109472775A (en) * | 2018-10-16 | 2019-03-15 | 深圳市华星光电技术有限公司 | Display periphery detection system and its method |
| JP2020086419A (en) * | 2018-11-28 | 2020-06-04 | 雄二 橋本 | Adjustment method and adjustment system for obtaining uniformity of plural control objects and conveyer device and adjusted equipment |
| CN111261074B (en) * | 2018-11-30 | 2023-10-31 | 上海耕岩智能科技有限公司 | Method for detecting whether screen emits light uniformly, storage medium and electronic equipment |
| KR102575130B1 (en) * | 2018-12-26 | 2023-09-05 | 주식회사 엘엑스세미콘 | Dmura compensation driver |
| CN111652865B (en) * | 2020-05-29 | 2022-04-08 | 惠州市华星光电技术有限公司 | Mura detection method, device and readable storage medium |
| CN111796441B (en) * | 2020-07-30 | 2023-03-24 | 固安浩瀚光电科技有限公司 | Development device for independent Mura restoration framework of liquid crystal display panel secondary development |
| CN112184723B (en) * | 2020-09-16 | 2024-03-26 | 杭州三坛医疗科技有限公司 | Image processing method and device, electronic equipment and storage medium |
| CN115793299B (en) * | 2023-02-06 | 2023-06-13 | 康惠（惠州）半导体有限公司 | Device and method for detecting brightness uniformity of touch TFT display screen |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5455601A (en) * | 1993-04-21 | 1995-10-03 | Fujitsu Limited | Method of and apparatus for displaying image |
| TW200428073A (en) * | 2003-05-27 | 2004-12-16 | Nihon Micronics Kk | Lighting inspection device for liquid crystal display device |
| CN1690678A (en) * | 2004-04-19 | 2005-11-02 | 株式会社半导体能源研究所 | Image analysis method, image analysis program and pixel evaluation system having the sames |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002122511A (en) * | 2000-10-17 | 2002-04-26 | Advanced Display Inc | Display unevenness detector and detection method |
| JP2005121724A (en) * | 2003-10-14 | 2005-05-12 | Sankyo Kk | Adjusting method of flat display apparatus |
| KR100559870B1 (en) * | 2003-11-04 | 2006-03-13 | 현대자동차주식회사 | A method for changing traveling lane |
| JP2005150349A (en) | 2003-11-14 | 2005-06-09 | Tdk Corp | Method for manufacturing laminated electronic component |
| JP2005165387A (en) * | 2003-11-28 | 2005-06-23 | Seiko Epson Corp | Method and device for detecting stripe defective of picture and display device |
| JP2005331929A (en) * | 2004-04-19 | 2005-12-02 | Semiconductor Energy Lab Co Ltd | Image analysis method, image analysis program, and pixel evaluation system therewith |
| JP2006135381A (en) * | 2004-11-02 | 2006-05-25 | Olympus Corp | Calibration method and calibration apparatus |
| JP2006210043A (en) * | 2005-01-26 | 2006-08-10 | Matsushita Electric Ind Co Ltd | Image evaluation method of plasma display panel |
| JP4681033B2 (en) | 2008-07-31 | 2011-05-11 | 株式会社イクス | Image correction data generation system, image data generation method, and image correction circuit |
| TW201022653A (en) * | 2008-12-10 | 2010-06-16 | Ind Tech Res Inst | Inspection method and system for display |
| JP5371099B2 (en) * | 2009-05-19 | 2013-12-18 | 株式会社日本マイクロニクス | Visual inspection device and visual inspection method |
| JP5026545B2 (en) * | 2010-03-30 | 2012-09-12 | シャープ株式会社 | Display device, luminance unevenness correction method, correction data creation device, and correction data creation method |
| JP4968380B2 (en) * | 2010-03-03 | 2012-07-04 | カシオ計算機株式会社 | Contact state detection method, touch panel device, and display device |
| JP5310811B2 (en) * | 2011-09-06 | 2013-10-09 | ソニー株式会社 | Temperature unevenness correction amount determination method, display device, temperature unevenness correction amount determination device, temperature unevenness correction device, and program |
| WO2013128616A1 (en) * | 2012-03-01 | 2013-09-06 | 株式会社日本マイクロニクス | Display unevenness detection method and device for display device |
-
2012
- 2012-03-01 WO PCT/JP2012/055273 patent/WO2013128617A1/en active Application Filing
- 2012-03-01 CN CN201280071032.XA patent/CN104160439B/en active Active
- 2012-03-01 JP JP2014501916A patent/JP6041858B2/en active Active
- 2012-03-01 KR KR1020147026918A patent/KR101640118B1/en active IP Right Grant
- 2012-05-04 TW TW101115957A patent/TWI501626B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5455601A (en) * | 1993-04-21 | 1995-10-03 | Fujitsu Limited | Method of and apparatus for displaying image |
| TW200428073A (en) * | 2003-05-27 | 2004-12-16 | Nihon Micronics Kk | Lighting inspection device for liquid crystal display device |
| CN1690678A (en) * | 2004-04-19 | 2005-11-02 | 株式会社半导体能源研究所 | Image analysis method, image analysis program and pixel evaluation system having the sames |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140133882A (en) | 2014-11-20 |
| JPWO2013128617A1 (en) | 2015-07-30 |
| TW201338501A (en) | 2013-09-16 |
| CN104160439A (en) | 2014-11-19 |
| KR101640118B1 (en) | 2016-07-15 |
| JP6041858B2 (en) | 2016-12-14 |
| TWI501626B (en) | 2015-09-21 |
| WO2013128617A1 (en) | 2013-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104160439B (en) | The uneven detection method of display of display device and its device | |
| CN104137171B (en) | The uneven detection method of display of display device and its device | |
| US7783103B2 (en) | Defect detecting device, image sensor device, image sensor module, image processing device, digital image quality tester, and defect detecting method | |
| WO2020253827A1 (en) | Method and apparatus for evaluating image acquisition accuracy, and electronic device and storage medium | |
| CN108416766B (en) | Double-side light-entering type light guide plate defect visual detection method | |
| CN107516495A (en) | Detection method and device, its compensation method and the display device of pixel charging compensation | |
| CN105976382B (en) | A kind of TFT-LCD Mura defects detection methods based on defect area anticipation and level set | |
| JP2003066398A (en) | Method of classifying and processing unevenness of liquid crystal display panel, apparatus for the same and program | |
| CN106157286A (en) | Image processing method and screen light leak test method | |
| CN109345528A (en) | A kind of display screen defect inspection method and device based on human-eye visual characteristic | |
| KR20160006852A (en) | Vision inspection apparatus and method of detecting mura thereof | |
| US8237848B2 (en) | Image sensing apparatus and method for sensing target that has a defective portion region | |
| WO2004083901A2 (en) | Detection of macro-defects using micro-inspection inputs | |
| JP2009036582A (en) | Inspection method, inspection device and inspection program of plane display panel | |
| CN117455904A (en) | Electronic cigarette production quality detection method based on image processing | |
| CN110530894B (en) | Light guide plate bright spot defect detection method | |
| CN112396599A (en) | Visual inspection method for transparent packaged IC (integrated circuit) defects | |
| JP2005164565A (en) | Defect detection method for flat panel light- related plate element in low and high resolution images | |
| CN101566585B (en) | Method and system for evaluating object | |
| JP5182595B2 (en) | TFT array inspection method and TFT array inspection apparatus | |
| US10274711B2 (en) | Microscopic image recognition system and method for detecting protein-based molecule | |
| JP4367474B2 (en) | Defect inspection equipment | |
| JP5163948B2 (en) | Scanning beam inspection apparatus and defect detection signal processing method | |
| JP2013108879A (en) | Defect inspection method for periodic pattern and defect inspection device for periodic pattern | |
| JP2003254860A (en) | Method and apparatus for processing luminance information and method and apparatus for evaluating flicker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |