CN106782251A - A kind of display screen flaw evaluation method and its system - Google Patents
A kind of display screen flaw evaluation method and its system Download PDFInfo
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- CN106782251A CN106782251A CN201710046012.1A CN201710046012A CN106782251A CN 106782251 A CN106782251 A CN 106782251A CN 201710046012 A CN201710046012 A CN 201710046012A CN 106782251 A CN106782251 A CN 106782251A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The present invention is applied to field of terminal, there is provided a kind of display screen flaw evaluation method and its terminal.Methods described includes：Launch optical signal to the display screen to be evaluated for being input into completely black field signal, detect the luminance signal that the display screen to be evaluated feeds back under the optical signal, the luminance signal is converted into brightness value and is shown, the defective brightness value of tool is filtered out according to pre-conditioned, the defect rank of the display screen to be evaluated is determined according to the selection result.When being evaluated display screen defect using the above method, it is to avoid using the equipment of high cost, Simultaneous Detection is simple, it is to avoid complicated image, data handling procedure, the detection of various display screen defects can be widely used in.
Description
Technical field
The embodiment of the present invention belongs to field of terminal, more particularly to a kind of display screen flaw evaluation method and its system.
Background technology
The advantages of flat-panel monitor is with its high-resolution, high brightness and without geometry deformation, simultaneously because its small volume, weight
Amount is light and low in energy consumption, thus is widely used in people's consumption electronic product used in everyday, such as TV, computer, hand
Machine, flat board etc..But because the area of display constantly increases, complex manufacturing process, therefore, occur unavoidably in manufacturing process
Some defects, most common of which defect is exactly Mura defects.
" Mura " one word derives from Japanese, literal translates as spot, dirty.In FPD industry, using Mura as
Individual technical term represents a kind of typical uneven display defect of display.Being used the detection for Mura at present more
The digital image treatment technology of colored CCD, but digital image treatment technology has that equipment cost is high, image procossing is complicated etc. and asks
Inscribe, concentrate on a small number of panel upstream producers at present.Therefore, for current complete system plant man details in a play not acted out on stage, but told through dialogues mura method of determination and evaluation not
Foot, proposes a kind of Mura method of determination and evaluation.
The content of the invention
The embodiment of the invention provides a kind of display screen flaw evaluation method, it is intended in solving existing method, display screen
The equipment cost that Mura flaw evaluation methods are used is high, and image procossing is complicated, it is difficult to the problem being widely popularized.
Embodiment of the present invention first aspect, there is provided a kind of display screen flaw evaluation method, methods described includes：
Launch optical signal to the display screen to be evaluated for being input into completely black field signal；
Detect the luminance signal that the display screen to be evaluated feeds back under the optical signal；
The luminance signal is converted into brightness value and is shown；
The defective brightness value of tool is filtered out according to pre-conditioned, the display to be evaluated is determined according to the selection result
The defect rank of screen.
The second aspect of the embodiment of the present invention, there is provided a kind of display screen flaw evaluation terminal, the terminal includes：
Optical signal launch unit, for launching optical signal to the display screen to be evaluated for being input into completely black field signal；
Detection unit, for detecting the luminance signal that the display screen to be evaluated feeds back under the optical signal；
Converting unit, for the luminance signal being converted into brightness value and being shown；
Screening and assessment unit, for filtering out the defective brightness value of tool according to pre-conditioned, and according to the screening knot
Fruit determines the defect rank of the display screen to be evaluated.
In embodiments of the present invention, detection optical signal is launched by the display screen to be evaluated under completely black field state,
And the luminance signal that the display screen feeds back is received, after most luminance signals are converted into bright values, the brightness value is sieved
Choosing, the defect of the display screen is evaluated according to the selection result.When being evaluated display screen defect using the above method, it is to avoid make
With the equipment of high cost, Simultaneous Detection is simple, it is to avoid complicated image, data handling procedure, can be widely used in
The detection of various display screen defects.
Brief description of the drawings
Fig. 1 is a kind of flow chart of display screen flaw evaluation method that first embodiment of the invention is provided；
Fig. 2 is the display figure of brightness values of the color management software CA-S20w to being fed back；
Fig. 3 is the schematic diagram of the defect brightness value screening conditions set-up mode that first embodiment of the invention is provided；
Fig. 4 is color management software CA-S20w to the brightness value selection markers figure for being fed back；
Fig. 5 is a kind of structure chart of display screen flaw evaluation terminal that second embodiment of the invention is provided.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
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.
In the embodiment of the present invention, by receiving the luminance signal that the screen to be shown in completely black field state feeds back, further
Above-mentioned luminance signal is converted into brightness value, then brightness value is screened, is marked, by the brightness value of marked area,
Calculate the defect rank of display screen to be evaluated.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
Embodiment one：
Fig. 1 shows a kind of flow chart of display screen flaw evaluation method that first embodiment of the invention is provided, and describes in detail such as
Under：
Step S11, optical signal is launched to the display screen to be evaluated for being input into completely black field signal；
At present, the application of display screen is more and more extensive, but the production process of display screen occurs some defects unavoidably, wherein
Most common defect is exactly Mura defects.
Detected to display screen Mura defects, and when choosing its defect rank, first by display to be evaluated to be detected
Screen is adjusted to standard operating conditions, is input into completely black field signal；The completely black field signal refers to that the brightness of display screen, contrast are 0
State.
Then, at 3 times of height of display screen, regulation camera lens is just right with screen center, a period of time under illuminating state
Afterwards, to the display screen to be evaluated transmitting test optical signal in completely black field state.Preferably, using CA-2000 two-dimensional colors point
Analyzer is measured to display screen to be evaluated；Comprising the sensor with XYZ wave filters, energy in the analysis of CA-2000 two-dimensional colors
The interference of enough filtering clutters to greatest extent, and CA-2000 two-dimensional colors analyzer offer and the grade color letters of CIE 1931
The approximate light splitting susceptibilitys of number, the measurement of the briliancy/colourity that can realize having the very big degree of association with visual valuation result.
Specific test process includes：The position relationship of CA-2000 two-dimensional colors analyzer and display screen to be evaluated is set；
At 3 times of height of display screen to be evaluated, make the CCD alignment lenses display screen to be evaluated in CA-2000 two-dimensional color analyzers
Screen center；Launch to display screen to be evaluated after CA-2000 two-dimensional colors analyzer is in open state half an hour and survey
Examination optical signal.To again be tested after the CA-2000 two-dimensional colors analysis start preheated one-section time, can be in test equipment
Stable state, it is ensured that the brightness stability of lamp bar, so that the brightness value of follow-up gained display screen feedback is more accurate, improves aobvious
The precision that display screen defect rank is evaluated.
Step S12, detects the luminance signal that the display screen to be evaluated feeds back under the optical signal；
Step S13, is converted to the luminance signal brightness value and shows；
Preferably, the luminance signal is converted into brightness value and is shown, specially：
The area of the display screen to be evaluated is divided into specified number；Wherein, the quantity of the specified number is by scheming
As data handling system is determined.
The luminance signal of every part of display screen feedback to be evaluated is converted into brightness value to store and show.
Specifically, the display screen to be evaluated in details in a play not acted out on stage, but told through dialogues state receive test optical signal after, with the shape of luminance signal
Formula receives the luminance signal that the display screen is returned to test device feedback information, test device, by luminance signal conversion
It is specific brightness number, stores and show.Preferably, the display screen to be evaluated in details in a play not acted out on stage, but told through dialogues state receives CA-2000 bis-
After the test optical signal that CCD camera lenses in dimension color analysis instrument send, CA-2000 two-dimensional color analyzers brightness letter is fed back to
Number, the luminance signal is converted into brightness value by CA-2000 two-dimensional colors analyzer, by the color pipe enclosed as standard fitting
Reason software CA-S20w is stored and is shown the brightness value.The color management software CA-S20w, can be by the brightness obtained by measurement
Value Data is displayed in visual and understandable visualization forms, and carries out various evaluations and analysis by simple operations.In color pipe
When reason software CA-S20w shows the luminance data, the brightness value is divided into 32*18 numerical value and is shown, equivalent to
Display screen to be evaluated is divided into 32*18 parts, the brightness value information of every portion is shown.Preferably, can be by the 32*
18 brightness values are stored in Excel, and are shown.Display such as Fig. 2 institutes of brightness values of the color management software CA-S20w to being fed back
Show.32*18 measured brightness value is stored the screening of the convenient follow-up brightness value to existing defects in Excel.
Step S14, the defective brightness value of tool is filtered out according to pre-conditioned, is treated according to the selection result determines
Evaluate the defect rank of display screen.
Preferably, it is described to filter out the defective brightness value of tool according to pre-conditioned, institute is determined according to the selection result
The defect rank of display screen to be evaluated is stated, is specifically included：
Determine to be used to screen the threshold value for having defective brightness value in each column brightness value；
Preferably, the average value of each column brightness value is determined；
Using the average value of each column brightness value as in same row brightness value for screening the defective brightness value of tool
Threshold value.
Each column brightness value is compared with the threshold value of the brightness value of the same row brightness value for determining, mark is more than or equal to described
The brightness value of threshold values, obtains labeled brightness value region；
Determine the luminance mean value in the labeled brightness value region；
According to the luminance mean value, the defect rank in the labeled brightness value region is determined.
Specifically, each brightness value fed back after 32*18 parts is divided into equal size for display screen to be evaluated to sieve
Choosing, arranging as unit is screened during screening；
First, the average value of each column brightness value is calculated, the average value is set as the valve during screening of respective column brightness value
Value, while calculating the average value of all brightness values；Because the subjective expression of display screen Mura defects is that brightness is higher than average value, i.e.,
Show white group.Therefore, when average value of the threshold values less than all brightness values, judge that this row brightness value is normal brightness
Value, terminates the screening to this row brightness value.For threshold values more than or equal to all brightness values row, by the brightness value in each column with
Set threshold values compares, and the brightness value in each column more than or equal to the threshold values is marked, and the brightness value for being marked is i.e.
It is the brightness value with Mura defects.
Fig. 3 is the schematic diagram of Mura defect brightness value screening conditions set-up modes, as shown in FIG., sets threshold values to Fig. 2
The first column data is screened in the luminance data table of middle offer.The average value for calculating first row brightness value in Fig. 2 is
0.132, the threshold values of this column filter is set to, it is brightness value of the mark more than or equal to 0.132 to set conditional formats.
As shown in figure 4, obtaining four labeled regions after to being screened per column data in Fig. 2, as display screen is deposited
In four regions of Mura defects.The brightness value of each marked area is counted, the average value of marked area brightness value is calculated,
According to SEMI standards (semiconductor equipment material industry association standard), the Mura defects in each region of display screen etc. are calculated
Level.
Specific formula for calculation is as follows：
Wherein：
In formula, CxIt is the average contrast of display screen Mura defect areas to be evaluated.SxIt is the area of Mura defects, unit
It is mm2.C in formula1It is the average value of brightness value, C in profile2It is the average value of the outer brightness value of profile.
Preferably, it is described the defect rank of the display screen to be evaluated is determined according to the selection result after, also include：
The defect area of the display screen is determined according to the selection result.
Because the brightness value is that after being divided into 32*18 parts in equal size by the area of display screen to be evaluated, every part of area institute is anti-
The information gained of feedback；Therefore, each brightness value represents the display area to be evaluated of every portion, counts each labeled
The brightness value quantity of Mura defect areas accounts for the percentage of total luminance value quantity, and the area in conjunction with display screen to be evaluated can be obtained
Go out the size of each Mura defect area.
The calculating process of the display screen Mura defect ranks and defect area is illustrated by taking 32 cun of displays as an example below：
Mura defects brightness value to display screen to be evaluated carries out the result of selection markers as shown in figure 4, with upper left in Fig. 4
As a example by the marked area of angle：
1) average value of the brightness value for counting and calculating Fig. 4 upper left corners marked area is 0.2195nits；
2) the region total luminance value that brightness value in the marked area of the upper left corner is more than the regional luminance average value average is calculated,
That is C in formula (2)1Value, result of calculation is：0.2608nits；
3) the region total luminance value that brightness value in the marked area of the upper left corner is less than the regional luminance average value average is calculated,
That is C in formula (2)2Value, result of calculation is：0.1800nits；
4) formula (2) is called, the upper left corner marked area average contrast is calculated for Cx=0.4490nits；
5) Mura areal calculations：By taking 32 cun of displays as an example, display head of district side is 708.4mm, and bond length is
398.5mm；Side long is divided into 32 equal portions, short side is divided into 18 equal portions, and every part of length of side is 22.14mm, and area is 409.12mm2.Should
The pixel that display screen upper left corner marked area Mura defects are occupied is 47.Therefore, the display screen upper left corner Mura defect areas
Correspond to 23035.7mm2；
6) formula (1) is called, it is 0.567 to calculate display screen upper left corner Mura defect ranks.
Table 1 is display screen different zones Mura areas and Mura grades obtained by being calculated according to above-mentioned algorithm.
The display screen Mura areas of table 1 and Mura grades
| The upper left corner | The upper right corner | The lower left corner | The lower right corner | |
| Luminance mean value/nits | 0.2195 | 0.1790 | 0.2007 | 0.2070 |
| Mura areas/mm2 | 23035.7 | 16174.0 | 6371.6 | 20585.1 |
| Mura grades | 0.567 | 0.325 | 0.314 | 0.469 |
In first embodiment of the invention, according to the display screen to be evaluated under completely black field state to the anti-of measurement optical signal
Feedback, calculates brightness value, by the screening to the brightness value, the Mura regions of mark display screen to be evaluated, according to described
Marked area mean flow rate is worth to the zone leveling contrast value, and then obtains the display screen regional to be evaluated
Mura defect ranks.When the method provided using first embodiment of the invention evaluates the Mura defects of display screen, not only can be with
Display screen Mura grades are detected, Mura brightness and the area of display screen can also be checked, so as to comprehensively evaluating display screen
Quality, the method for testing is quick, and image procossing is simple, uses equipment simply, can be widely used in display products
Quality testing.
It should be understood that in embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the elder generation of execution sequence
Afterwards, the execution sequence of each process should be with its function and internal logic determination, the implementation process structure without tackling the embodiment of the present invention
Into any restriction.
Embodiment two：
Fig. 2 shows a kind of structure chart of display screen flaw evaluation terminal that second embodiment of the invention is provided, in order to just
In explanation, the part related to the embodiment of the present invention is illustrate only.
The display screen flaw evaluation terminal includes：Optical signal launch unit 51, detection unit 52, converting unit 53, screening
Evaluation unit 54；Wherein：
Optical signal launch unit 51, for launching optical signal to the display screen to be evaluated for being input into completely black field signal；
Detected to display screen Mura defects, and when choosing its defect rank, first by display to be evaluated to be detected
Screen is adjusted to standard operating conditions, is input into completely black field signal；The completely black field signal refers to that the brightness of display screen, contrast are 0
State.Then, at 3 times of height of display screen, regulation camera lens is just right with screen center, a period of time under illuminating state
Afterwards, by optical signal launch unit 51, to the display screen to be evaluated transmitting test optical signal in completely black field state.
Detection unit 52, for detecting the luminance signal that the display screen to be evaluated feeds back under the optical signal；
Converting unit 53, for the luminance signal being converted into brightness value and being shown；
Preferably, the converting unit 53 is specifically included：
Area processing module 531, for the area of the display screen to be evaluated to be divided into specified number；
Conversion display module 532, for the luminance signal of every part of display screen feedback to be evaluated to be converted into brightness value storage
And show.
Specifically, the display screen to be evaluated in details in a play not acted out on stage, but told through dialogues state, is receiving the test that optical signal launch unit 51 sends
After optical signal, to the feedback information of detection unit 52 in the form of luminance signal, detection unit 52 receives what the display screen was returned
Luminance signal, specific brightness number is converted into by converting unit 53 by the luminance signal, is stored and is shown.
Preferably, by the Area processing module 531 in converting unit 53, the area of display screen to be evaluated is divided into
32*18 parts, the luminance signal of every part of display screen is converted into brightness value by conversion display module 532, that is, obtains 32*18 brightness
Value；Preferably, by 32*18 brightness values storage in Excel, and can show.
Screening and assessment unit 54, for filtering out the defective brightness value of tool according to pre-conditioned, and according to the screening
Result determines the defect rank of the display screen to be evaluated.
Preferably, single 54 yuan of the screening is specifically included：
Threshold determination module 541, for determining to be used to screen the threshold value for having defective brightness value in each column brightness value；
Defect brightness value mark module 542, for by the brightness value of each column brightness value and the same row brightness value for determining
Threshold value compares, and mark obtains labeled brightness value region more than or equal to the brightness value of the threshold values；
Luminance mean value determining module 543, the luminance mean value for determining the labeled brightness value region；
Defect rank determining module 544, for according to the luminance mean value, determining the labeled brightness value region
Defect rank.
Preferably, the threshold determination module 541 is specifically included：
Average determining module 5411, the average value for determining each column brightness value；
Threshold determination module 5412, for using the average value of each column brightness value as in same row brightness value for sieving
The threshold value of the defective brightness value of choosing tool.
Specifically, each brightness value fed back after 32*18 parts is divided into equal size for display screen to be evaluated to sieve
Choosing, arranging as unit is screened during screening；
First, the average value of each column brightness value is calculated, the average value is set as the valve during screening of respective column brightness value
Value, while calculating the average value of all brightness values；Because the subjective expression of display screen Mura defects is that brightness is higher than average value, i.e.,
Show white group.Therefore, when average value of the threshold values less than all brightness values, judge that this row brightness value is normal brightness
Value, terminates the screening to this row brightness value.For threshold values more than or equal to all brightness values row, by the brightness value in each column with
Set threshold values compares, and the brightness value in each column more than or equal to the threshold values is marked, and the brightness value for being marked is i.e.
It is the brightness value with Mura defects.
Preferably, the terminal also includes：Defect area determining unit 55, described in being determined according to the selection result
The defect area of display screen.
Because the brightness value is that after being divided into 32*18 parts in equal size by the area of display screen to be evaluated, every part of area institute is anti-
The information gained of feedback；Therefore, each brightness value represents the display area to be evaluated of every portion, counts each labeled
The brightness value quantity of Mura defect areas accounts for the percentage of total luminance value quantity, and the area in conjunction with display screen to be evaluated can be obtained
Go out the size of each Mura defect area.
In second embodiment of the invention, when the evaluation of Mura grades is carried out to display screen, sent by optical signal launch unit
Test optical signal, detection unit receives the feedback luminance signal of display screen, this luminance signal is converted into brightness by converting unit
Value, after being screened to above-mentioned brightness value through screening and assessment unit, marks the defective region of display screen, bright according to institute's marked region
Angle value calculates the Mura defect ranks of the display screen.Above-mentioned detection device is simple, and has operated, it is to avoid at complicated image
Reason process, it is easy to popularization and application.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Unit and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel
Described function, but this realization can be realized it is not considered that exceeding using distinct methods to each specific application
The scope of the present invention.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the terminal of foregoing description
With the specific work process of unit, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.In the application
In the several embodiments for being provided, it should be understood that disclosed terminal and method, can realize by another way.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of display screen flaw evaluation method, it is characterised in that methods described includes：
Launch optical signal to the display screen to be evaluated for being input into completely black field signal；
Detect the luminance signal that the display screen to be evaluated feeds back under the optical signal；
The luminance signal is converted into brightness value and is shown；
The defective brightness value of tool is filtered out according to pre-conditioned, the display screen to be evaluated is determined according to the selection result
Defect rank.
2. method according to claim 1, it is characterised in that described the luminance signal to be converted into brightness value and is shown
Show, specially：
The area of the display screen to be evaluated is divided into specified number；
The luminance signal of every part of display screen feedback to be evaluated is converted into brightness value to store and show.
3. method according to claim 1, it is characterised in that described to filter out the defective brightness of tool according to pre-conditioned
Value, the defect rank of the display screen to be evaluated is determined according to the selection result, is specifically included：
Determine to be used to screen the threshold value for having defective brightness value in each column brightness value；
Each column brightness value is compared with the threshold value of the brightness value of the same row brightness value for determining, mark is more than or equal to the threshold values
Brightness value, obtain labeled brightness value region；
Determine the luminance mean value in the labeled brightness value region；
According to the luminance mean value, the defect rank in the labeled brightness value region is determined.
4. method according to claim 3, it is characterised in that be used to screen that there is defect in the determination each column brightness value
Brightness value threshold value, specifically include：
Determine the average value of each column brightness value；
Using the average value of each column brightness value as in same row brightness value for screening the threshold value of the defective brightness value of tool.
5. the method according to claim any one of 1-4, it is characterised in that had according to pre-conditioned filtering out described
The brightness value of defect, after determining the defect rank of the display screen to be evaluated according to the selection result, also includes：According to institute
State the defect area that the selection result determines the display screen.
6. a kind of display screen flaw evaluation terminal, it is characterised in that the terminal includes：
Optical signal launch unit, for launching optical signal to the display screen to be evaluated for being input into completely black field signal；
Detection unit, for detecting the luminance signal that the display screen to be evaluated feeds back under the optical signal；
Converting unit, for the luminance signal being converted into brightness value and being shown；
Screening and assessment unit for filtering out the defective brightness value of tool and true according to the selection result according to pre-conditioned
The defect rank of the fixed display screen to be evaluated.
7. terminal according to claim 6, it is characterised in that the converting unit is specifically included：
Area processing module, for the area of the display screen to be evaluated to be divided into specified number；
Conversion display module, stores and shows for the luminance signal of every part of display screen feedback to be evaluated to be converted into brightness value.
8. terminal according to claim 6, it is characterised in that the screening unit is specifically included：
Threshold determination module, for determining to be used to screen the threshold value for having defective brightness value in each column brightness value；
Defect brightness value mark module, for by each column brightness value with determine same row brightness value brightness value threshold value ratio
Compared with mark obtains labeled brightness value region more than or equal to the brightness value of the threshold values；
Luminance mean value determining module, the luminance mean value for determining the labeled brightness value region；
Defect rank determining module, for according to the luminance mean value, determining described labeled defect in brightness value region etc.
Level.
9. terminal according to claim 8, it is characterised in that the threshold determination module is specifically included：
Average determining module, the average value for determining each column brightness value；
Threshold determination module, for using the average value of each column brightness value as lacking for screening to have in same row brightness value
The threshold value of sunken brightness value.
10. terminal according to claim 1, it is characterised in that the terminal also includes：
Defect area determining unit, the defect area for determining the display screen according to the selection result.
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| CN107328791A (en) * | 2017-07-31 | 2017-11-07 | 京东方科技集团股份有限公司 | A kind of defect inspection method and device |
| WO2019205665A1 (en) * | 2018-04-26 | 2019-10-31 | 京东方科技集团股份有限公司 | Self-monitoring method for display, and display |
| CN111175027A (en) * | 2020-02-21 | 2020-05-19 | 卡莱特（深圳）云科技有限公司 | Method and device for identifying display abnormality of display screen |
| CN112862800A (en) * | 2021-02-25 | 2021-05-28 | 歌尔科技有限公司 | Defect detection method and device and electronic equipment |
| CN114298254A (en) * | 2021-12-27 | 2022-04-08 | 亮风台（上海）信息科技有限公司 | Method and equipment for acquiring display parameter test information of optical equipment |
| CN114355638A (en) * | 2021-12-23 | 2022-04-15 | 中航华东光电有限公司 | Quantitative evaluation equipment and method for black field Mura of display |
| US11727837B2 (en) | 2018-04-26 | 2023-08-15 | Beijing Boe Display Technology Co., Ltd. | Self-monitoring method of display and display |
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| CN112862800B (en) * | 2021-02-25 | 2023-01-24 | 歌尔科技有限公司 | Defect detection method and device and electronic equipment |
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Application publication date: 20170531 |