CN104374551B - LED luminance uniformity detection method and system thereof - Google Patents
LED luminance uniformity detection method and system thereof Download PDFInfo
- Publication number
- CN104374551B CN104374551B CN201410678510.4A CN201410678510A CN104374551B CN 104374551 B CN104374551 B CN 104374551B CN 201410678510 A CN201410678510 A CN 201410678510A CN 104374551 B CN104374551 B CN 104374551B
- Authority
- CN
- China
- Prior art keywords
- bisector
- led
- frame
- image
- center
- 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
Landscapes
- Led Device Packages (AREA)
- Led Devices (AREA)
Abstract
The invention discloses an LED luminance uniformity detection method and a system of the LED luminance uniformity detection method. The method comprises the steps that the light spot image of an LED to be detected is obtained; a rectangular box with the center coinciding with the light spot center of the light spot image is arranged, the image gray level of an assigned angle in the rectangular box is obtained, and a gray level distribution curve is obtained according to the image gray level of the assigned angle in the rectangular box; the absolute value of the difference value between a first peak value and a second peak value in the gray level distribution curve is obtained, the absolute value is compared with a preset gray level threshold value, and when the absolute value is smaller or equal to the gray level threshold value, the LED to be detected emits uniform light; when the absolute value is larger than the gray level threshold value, the LED to be detected emits non-uniform light. According to the LED luminance uniformity detection method and the system of the LED luminance uniformity detection method, LED luminance uniformity detection is easier and faster, detection accuracy is high, and large-scale semi-automatic detection can be achieved.
Description
Technical field
The present invention relates to technical field of image processing, more particularly to a kind of LED uniformity of luminance detection method and its
System.
Background technology
In direct-light-type backlight design, in order to reduce the quantity of LED, while by with the LED of spot light characteristic transformations
For area source, it is widely used for LED and secondary optical lens is combined as light source, it is right whether light is uniformly distributed after lens
Final display quality has a great impact, so as to become the problem that each manufacturer more pays close attention to.
At present, for single LEDs and the uniformity of luminance after lens combination, the mode of predominantly detecting has two kinds, and one is to pass through
Whether the hot spot that eye-observation is formed on screen is received is uniform；Two is the brightness value for using brightness measurer to measure difference, than
Whether more individual brightness value be consistent.But existing detection mode has weak point, by way of eye-observation hot spot, rely primarily on
Observer personal experience and criterion；And the mode detected by using instrument, then complex operation.By above two mode
It is less efficient, it is impossible to realize mass detection.
Therefore, prior art has yet to be improved and developed.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided a kind of LED is luminous uniform
Property detection method and its system, it is intended to solve to detect that LED uniformity of luminance efficiency is low in prior art, and can not in high volume carry out
The defect of detection.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of LED uniformity of luminance detection method, wherein, methods described includes step：
A, the light spot image for obtaining LED to be detected；
The rectangle that B, one center of setting overlap with the spot center in the light spot image selects frame, and obtains the rectangle choosing
The gradation of image of specified angle in frame, selects the gradation of image of specified angle in frame to obtain intensity profile bent further according to the rectangle
Line；
The absolute value of the first peak value and the second peak difference values in C, the acquisition intensity profile curve, and will be described absolute
Value compares with a default gray threshold, and when the absolute value is less than or equal to the gray threshold, then LED to be detected lights
Uniformly；When the absolute value is more than the gray threshold, then LED non-uniform lights to be detected.
The LED uniformity of luminance detection method, wherein, also include before step A：
S, one is pre-set for determining the gray threshold of LED uniformity of luminance.
The LED uniformity of luminance detection method, wherein, step B is specifically included：
The square that B1, one center of setting overlap with the spot center in the light spot image selects frame；
B2, with a spot center in the light spot image, and select one group of horizontal direction in frame to put down with square
The square is selected frame to halve by the first parallel bisector of row side, then with first bisector in 45 ° of angles and
Through the second bisector of the spot center, with first bisector in 90 ° of angles and through the of the spot center
Three bisectors, with first bisector in 135 ° of angles and through the 4th bisector of the spot center, by the pros
Shape is selected in frame positioned at the rectangular area quartering on the first bisector top；
B3, obtain respectively the square select in frame positioned at the first bisector top rectangular area the subregions such as four
Gray value；
B4, obtain intensity profile curves according to the subregional gray values such as four.
The LED uniformity of luminance detection method, wherein, the rectangle selects the selected areas of frame at least to include the hot spot
The center dark space of image.
The LED uniformity of luminance detection method, wherein, first peak value is the gray scale with second peak value
Peak in distribution curve.
A kind of LED uniformity of luminance detecting system, wherein, including：
Image collection module, for obtaining the light spot image of LED to be detected；
Grey scale curve acquisition module, for arranging the rectangle choosing that a center overlaps with the spot center in the light spot image
Frame, and the gradation of image that the rectangle selects specified angle in frame is obtained, select the image of specified angle in frame further according to the rectangle
Gray scale obtains intensity profile curve；
Uniformity judge module, for obtaining the intensity profile curve in the first peak value it is exhausted with the second peak difference values
To value, and the absolute value is compared with a default gray threshold, when the absolute value is less than or equal to the gray threshold
When, then LED to be detected is luminous uniform；When the absolute value is more than the gray threshold, then LED non-uniform lights to be detected.
The LED uniformity of luminance detecting system, wherein, also include：
Setup module, is used to determine the gray threshold of LED uniformity of luminance for pre-setting one.
The LED uniformity of luminance detecting system, wherein, the grey scale curve acquisition module is specifically included：
Frame setup unit is selected, for arranging the square choosing that a center overlaps with the spot center in the light spot image
Frame；
The subdivisions such as region, for a spot center in the light spot image, and select in frame with square
The square is selected frame to halve by one group of first parallel bisector of horizontal direction parallel side, then to divide equally with described first
Line in 45 ° of angles and through the second bisector of the spot center, with first bisector in 90 ° of angles and through institute
The 3rd bisector of spot center is stated, with first bisector in 135 ° of angles and through Siping City of the spot center
Separated time, the square is selected in frame positioned at the rectangular area quartering on the first bisector top；
Gray value acquiring unit, selects in frame positioned at the rectangle region on the first bisector top for obtaining the square respectively
The subregional gray values such as four in domain；
Intensity profile curve acquisition unit, for obtaining intensity profile curve according to the subregional gray values such as four.
The LED uniformity of luminance detecting system, wherein, the rectangle selects the selected areas of frame at least to include the hot spot
The center dark space of image.
The LED uniformity of luminance detecting system, wherein, first peak value is the gray scale with second peak value
Peak in distribution curve.
A kind of LED uniformity of luminance detection method provided by the present invention and its system, methods described includes：Obtain to be checked
Survey the light spot image of LED；The rectangle that one center overlaps with the spot center in the light spot image is set and selects frame, and obtain described
Rectangle selects the gradation of image of specified angle in frame, selects the gradation of image of specified angle in frame to obtain gray scale point further according to the rectangle
Cloth curve；Obtain the absolute value of the first peak value in the intensity profile curve and the second peak difference values, and by the absolute value
Compare with a default gray threshold, when the absolute value is less than or equal to the gray threshold, then LED to be detected is luminous equal
It is even；When the absolute value is more than the gray threshold, then LED non-uniform lights to be detected.The invention enables LED's is luminous equal
Even property detection more simple and fast, and accuracy of detection is high, while the semi-automatic detection of high-volume can also be realized.
Description of the drawings
Fig. 1 is the flow chart of LED uniformity of luminance detection method preferred embodiment of the present invention.
Fig. 2 is the particular flow sheet that intensity profile curve is obtained in LED uniformity of luminance detection method of the present invention.
Fig. 3 is to select the schematic diagram of frame to light spot image setting rectangle in LED uniformity of luminance detection method of the present invention.
Fig. 4 is the schematic diagram that eight equal parts rectangle selects frame in LED uniformity of luminance detection method of the present invention.
Fig. 5 is the schematic diagram of the intensity profile curve obtained in LED uniformity of luminance detection method of the present invention.
Fig. 6 is the structured flowchart of LED uniformity of luminance detecting system preferred embodiment of the present invention.
Fig. 7 is the concrete structure drawing of device of image collection module in LED uniformity of luminance detecting system of the present invention.
Fig. 8 is the side view of LED to be detected of the present invention.
Specific embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously referring to the drawings embodiment pair
The present invention is further described.It should be appreciated that specific embodiment described herein is only to explain the present invention, and without
It is of the invention in limiting.
Fig. 1 is referred to, Fig. 1 is the flow chart of LED uniformity of luminance detection method preferred embodiment of the present invention.As schemed
Shown in 1, the LED uniformity of luminance detection method, including：
Step S100, the light spot image for obtaining LED to be detected.
In presently preferred embodiments of the present invention, image acquiring device need to be first passed through to obtain multiple hot spot figures of LED to be detected
Picture, and obtain further result by analyzing multiple light spot images.
The rectangle that step S200, one center of setting overlap with the spot center in the light spot image selects frame, and obtains institute
The gradation of image that rectangle selects specified angle in frame is stated, selects the gradation of image of specified angle in frame to obtain gray scale further according to the rectangle
Distribution curve.
In step s 200, the geometric center rectangle that overlaps with the spot center in the light spot image is first set and selects frame,
And the rectangle selects the part clear zone in center dark space that frame surrounded in the light spot image and outside.Then the rectangle choosing is obtained
The gradation of image of specified angle in frame, selects the gradation of image of specified angle in frame to obtain LED to be detected finally according to the rectangle
Intensity profile curve.When being embodied as, in order to improve the image intensity value degree of accuracy, multiple light are obtained to same LED to be detected
Spot image, and by the average gray of the same pixel of the gray count of plurality of pictures, and according to the multiple pictures in specified angle
The average gray of vegetarian refreshments obtains the intensity profile curve of LED to be detected.
The absolute value of the first peak value and the second peak difference values in step S300, the acquisition intensity profile curve, and will
The absolute value compares with a default gray threshold, when the absolute value is less than or equal to the gray threshold, then to be checked
Survey LED luminous uniform；When the absolute value is more than the gray threshold, then LED non-uniform lights to be detected.
Obviously, after the intensity profile curve is obtained according to light spot image, two peak values in curve need to be analyzed, is obtained
The peak value of two adjacent peaks, is designated as respectively LP and RP.Do difference operation by two peak values in left and right afterwards and obtain peak difference
DIS, i.e. DIS=| RP-LP |；When the value of DIS is not more than a default gray threshold, then judge that LED's to be detected is luminous equal
It is even；Conversely, when the value of DIS is more than gray threshold, then judging the non-uniform light of LED to be detected.It can be seen that, it is of the present invention
LED uniformity of luminance detection method analyzes distribution curve of the hot spot all directions gray value with position, energy by image processing method
More simple and fast, high accuracy, and the semi-automatic detection LED uniformity of luminance of high-volume.
Example is further carried out, is also included before the light spot image that LED to be detected is obtained in step S100：
Step S10, one is pre-set for determining the gray threshold of LED uniformity of luminance.
In presently preferred embodiments of the present invention, peak difference DIS is allowed in the gray threshold for pre-setting i.e. step S300
Error amount.When the value of DIS is not more than the error amount for allowing, then judge that LED's to be detected is luminous uniform；Conversely, when DIS's
When value is more than the error amount for allowing, then the non-uniform light of LED to be detected is judged.
Example is further carried out, as shown in Fig. 2 intensity profile curve is obtained in step S200 specifically including：
The square that step S201, one center of setting overlap with the spot center in the light spot image selects frame.
Specifically, as shown in figure 3, when the light spot image to obtaining in step S100 is further processed, arranging more than one
The square what center overlaps with the spot center in the light spot image selects frame, and the square selects frame to surround the hot spot
The part clear zone of center dark space and outside in image.
Step S202, with a spot center in the light spot image, and one group of level in frame is selected with square
The square is selected frame to halve by the first parallel bisector of direction parallel edges, then with first bisector be in 45 °
Angle and through the second bisector of the spot center, with first bisector in 90 ° of angles and through the hot spot
3rd bisector at center, with first bisector in 135 ° of angles and through the 4th bisector of the spot center, will
The square is selected in frame positioned at the rectangular area quartering on the first bisector top.
Obviously, as shown in figure 3, step S202 is exactly to select frame to carry out 8 deciles on the square arranged in step S201, then select
Taking the square selects the rectangular area in frame positioned at the first bisector top to be further analyzed.
Step S203, the square is obtained respectively select in frame positioned at four etc. of rectangular area of the first bisector top
Subregional gray value.
Specifically, in step S203, first bisector, second bisector, the 3rd bisector are obtained
And the left and right sides one fixed width of the 4th bisector（I.e. certain amount of pixels）Gray value, that is, obtain Fig. 4 shown in
0 °, 45 °, 90 ° and 135 ° line left and right sides one fixed width（Typically 1-2mm）Belt-like zone in pixel gray scale
Value.
Step S204, obtain intensity profile curves according to the subregional gray values such as four.
Specifically, the intensity profile curve is grey level histogram（histogram）.Grey level histogram is the letter of gray level
Number, it represents the number of the pixel in image with every kind of gray level, reflects the frequency that every kind of gray scale occurs in image, in image
Abscissa represent gray value, ordinate then represents the number of times for each gray value occur.As shown in figure 5, obtaining in step S204
Intensity profile curve be the curve with dual waves unicast paddy, now the peak value of left and right two in curve is designated as respectively
Local Minimum gray value at LP and RP, wherein center of curve trough is designated as CP.Afterwards, in by analyzing intensity profile curve
Two crest differences, you can quickly analyze the uniformity of luminance of LED to be measured, and analysis result accuracy is high.
Based on above-mentioned LED uniformity of luminance detection method, present invention also offers a kind of LED uniformity of luminance detection dress
Put.Fig. 6 is referred to, it is the structured flowchart of LED uniformity of luminance detection means preferred embodiment of the present invention.Such as Fig. 6 institutes
Show, the LED uniformity of luminance detection means includes：
Image collection module 10, for obtaining the light spot image of LED to be detected；
Grey scale curve acquisition module 20, for arranging the rectangle that a center overlaps with the spot center in the light spot image
Frame is selected, and obtains the gradation of image that the rectangle selects specified angle in frame, further according to the rectangle figure of specified angle in frame is selected
As gray scale obtains intensity profile curve；
Uniformity judge module 30, for obtaining the intensity profile curve in the first peak value and the second peak difference values
Absolute value, and the absolute value is compared with a default gray threshold, when the absolute value is less than or equal to the gray scale threshold
During value, then LED to be detected is luminous uniform；When the absolute value is more than the gray threshold, then LED luminance nonuniformities to be detected
It is even.
When being embodied as, the structure chart of the concrete device that described image acquisition module 10 is adopted refers to Fig. 7.Such as Fig. 7 institutes
Show, described image acquisition module 10 includes mounting seat 100；The motor 200 being fixedly installed in the mounting seat 100；Gu
Surely it is arranged in the mounting seat 100, driven by the motor 200 and along the camera of the surface of the mounting seat 100 movement
Mounting seat 300；The UV cameras 400 for filtering light and collection hot spot being fixedly installed in the camera mounting seat 300；Gu
Surely be arranged in the mounting seat 100 and below the camera lens of UV cameras 400 for eliminating lamp bead image and obtaining light
The diffuser plate 500 of spot.
Further, as shown in fig. 7, described image acquisition module 10 also includes being fixedly installed on the diffuser plate 500
For providing the LED backlight 600 of light for UV cameras.
Further, as shown in fig. 7, being provided with the first guide rail 110 in the mounting seat 100, on first guide rail 110
Matched slide block structure 210 is provided with, the motor 200 is along first guide rail 110 in the table of the mounting seat 100
Move in face.The second guide rail 120 is additionally provided with the mounting seat 100, second guide rail 120 is provided with matched phase
Machine mounting seat 300, it is described to move on the surface of the mounting seat 100 along second guide rail 120 in camera mounting seat 300.
In presently preferred embodiments of the present invention, the diffuser plate 500 is used to place LED to be detected.It is to be detected when being embodied as
LED is the combination of adopting surface mounted LED and lens.As shown in figure 8, it is the side view of LED to be detected of the present invention, wherein described
Adopting surface mounted LED is SMD 3528LED, and the material of the lens is PMMA（That is polymethyl methacrylate）, it is to justify symmetrical junction
Structure.The lens have two curved surfaces, through the refraction of two curved surfaces light can be made to be irradiated to bigger scope, form face light
Source.The adopting surface mounted LED and the lens are installed on PCB in detection, and immediately below diffuser plate.
Example is further carried out, in the LED uniformity of luminance detecting system, is also included：
Setup module, is used to determine the gray threshold of LED uniformity of luminance for pre-setting one.
Example is further carried out, in the LED uniformity of luminance detecting system, the grey scale curve acquisition module 20 has
Body includes：
Frame setup unit is selected, for arranging the square choosing that a center overlaps with the spot center in the light spot image
Frame；
The subdivisions such as region, for a spot center in the light spot image, and select in frame with square
The square is selected frame to halve by one group of first parallel bisector of horizontal direction parallel side, then to divide equally with described first
Line in 45 ° of angles and through the second bisector of the spot center, with first bisector in 90 ° of angles and through institute
The 3rd bisector of spot center is stated, with first bisector in 135 ° of angles and through Siping City of the spot center
Separated time, the square is selected in frame positioned at the rectangular area quartering on the first bisector top；
Gray value acquiring unit, selects in frame positioned at the rectangle region on the first bisector top for obtaining the square respectively
The subregional gray values such as four in domain；
Intensity profile curve acquisition unit, for obtaining intensity profile curve according to the subregional gray values such as four.
Example is further carried out, in the LED uniformity of luminance detecting system, the rectangle selects the selected areas of frame extremely
Less including the center dark space of the light spot image.
Example is further carried out, in the LED uniformity of luminance detecting system, first peak value and second peak
Value is the peak in the intensity profile curve.
In sum, a kind of LED uniformity of luminance detection method provided by the present invention and its system, methods described bag
Include：Obtain the light spot image of LED to be detected；The rectangle choosing that one center overlaps with the spot center in the light spot image is set
Frame, and the gradation of image that the rectangle selects specified angle in frame is obtained, select the image of specified angle in frame further according to the rectangle
Gray scale obtains intensity profile curve；The absolute value of the first peak value in the intensity profile curve and the second peak difference values is obtained,
And compare the absolute value with a default gray threshold, when the absolute value is less than or equal to the gray threshold, then
LED to be detected is luminous uniform；When the absolute value is more than the gray threshold, then LED non-uniform lights to be detected.The present invention
So that the uniformity of luminance detection more simple and fast of LED, and accuracy of detection is high, while the semi-automatic inspection of high-volume can also be realized
Survey.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, and for those of ordinary skills, can
To be improved according to the above description or be converted, all these modifications and variations should all belong to the guarantor of claims of the present invention
Shield scope.
Claims (8)
1. a kind of LED uniformity of luminance detection method, it is characterised in that methods described includes step：
A, the light spot image for obtaining LED to be detected；
B, the rectangle that overlaps with the spot center in the light spot image of a center is set selects frame, and obtain the rectangle and select in frame
The gradation of image of specified angle, selects the gradation of image of specified angle in frame to obtain intensity profile curve further according to the rectangle；
C, obtain the first peak value in the intensity profile curve and the absolute value of the second peak difference values, and by the absolute value and
One default gray threshold compares, and when the absolute value is less than or equal to the gray threshold, then LED to be detected is luminous equal
It is even；When the absolute value is more than the gray threshold, then LED non-uniform lights to be detected；
Step B is specifically included：
The square that B1, one center of setting overlap with the spot center in the light spot image selects frame；
B2, with a spot center in the light spot image, and one group of horizontal direction parallel side in frame is selected with square
The square is selected frame to halve by the first parallel bisector, then with first bisector is in 45 ° of angles and passes through
Second bisector of the spot center is in 90 ° of angles and the 3rd flat through the spot center with first bisector
Separated time, with first bisector in 135 ° of angles and through the 4th bisector of the spot center, the square is selected
Positioned at the rectangular area quartering on the first bisector top in frame；
B3, obtain respectively the square select in frame positioned at the first bisector top rectangular area the subregional ashes such as four
Angle value；
B4, obtain intensity profile curves according to the subregional gray values such as four；
The B3 steps are specially：Obtain first bisector, second bisector, the 3rd bisector and described
The gray value of the pixel in the belt-like zone of the left and right sides 1-2cm width of four bisectors.
2. LED uniformity of luminance detection method according to claim 1, it is characterised in that also include before step A：
S, one is pre-set for determining the gray threshold of LED uniformity of luminance.
3. LED uniformity of luminance detection method according to claim 1, it is characterised in that the rectangle selects the selected areas of frame
Domain is at least including the center dark space of the light spot image.
4. LED uniformity of luminance detection method according to claim 1, it is characterised in that first peak value and described
Two peak values are the peak in the intensity profile curve.
5. a kind of LED uniformity of luminance detecting system, it is characterised in that include：
Image collection module, for obtaining the light spot image of LED to be detected；
Grey scale curve acquisition module, for arranging the rectangle that a center overlaps with the spot center in the light spot image frame is selected,
And the gradation of image that the rectangle selects specified angle in frame is obtained, select the gradation of image of specified angle in frame further according to the rectangle
Obtain intensity profile curve；
Uniformity judge module, for obtaining the intensity profile curve in the first peak value it is absolute with the second peak difference values
Value, and the absolute value is compared with a default gray threshold, when the absolute value is less than or equal to the gray threshold,
Then LED to be detected is luminous uniform；When the absolute value is more than the gray threshold, then LED non-uniform lights to be detected；
The grey scale curve acquisition module is specifically included：
Frame setup unit is selected, for arranging the square that a center overlaps with the spot center in the light spot image frame is selected；
The subdivisions such as region, for a spot center in the light spot image, and select a group in frame with square
The square is selected frame to halve by the first parallel bisector of horizontal direction parallel side, then to be in first bisector
45 ° of angles and through the second bisector of the spot center, with first bisector in 90 ° of angles and through the light
3rd bisector at spot center, with first bisector in 135 ° of angles and through the 4th bisector of the spot center,
The square is selected in frame positioned at the rectangular area quartering on the first bisector top；
Gray value acquiring unit, for obtaining the square respectively the rectangular area that the first bisector top is located in frame is selected
The subregional gray values such as four；
Intensity profile curve acquisition unit, for obtaining intensity profile curve according to the subregional gray values such as four；
The gray value acquiring unit is specially：Obtain first bisector, second bisector, the 3rd bisector
And the gray value of the pixel in the belt-like zone of the left and right sides 1-2cm width of the 4th bisector.
6. LED uniformity of luminance detecting system according to claim 5, it is characterised in that also include：
Setup module, is used to determine the gray threshold of LED uniformity of luminance for pre-setting one.
7. LED uniformity of luminance detecting system according to claim 5, it is characterised in that the rectangle selects the selected areas of frame
Domain is at least including the center dark space of the light spot image.
8. LED uniformity of luminance detecting system according to claim 5, it is characterised in that first peak value and described
Two peak values are the peak in the intensity profile curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678510.4A CN104374551B (en) | 2014-11-24 | 2014-11-24 | LED luminance uniformity detection method and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678510.4A CN104374551B (en) | 2014-11-24 | 2014-11-24 | LED luminance uniformity detection method and system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104374551A CN104374551A (en) | 2015-02-25 |
| CN104374551B true CN104374551B (en) | 2017-05-10 |
Family
ID=52553601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410678510.4A Active CN104374551B (en) | 2014-11-24 | 2014-11-24 | LED luminance uniformity detection method and system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104374551B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105243970B (en) * | 2015-11-19 | 2018-10-09 | 广东威创视讯科技股份有限公司 | A kind of LED uniformities appraisal procedure and device |
| KR101862310B1 (en) * | 2015-12-07 | 2018-05-29 | 에이피시스템 주식회사 | Apparatus and Method for Detecting Mura Defects |
| CN108827597B (en) * | 2018-05-02 | 2020-05-12 | 信利光电股份有限公司 | Light spot uniformity detection method and detection system of structured light projector |
| CN108765396B (en) * | 2018-05-21 | 2020-10-27 | 深圳可思美科技有限公司 | Light-emitting detection method of light-emitting equipment based on computer vision |
| CN109186941A (en) * | 2018-08-09 | 2019-01-11 | 信利光电股份有限公司 | A kind of detection method and system of light source uniformity |
| CN109060314B (en) * | 2018-08-20 | 2020-09-11 | 深圳科瑞技术股份有限公司 | Lamp panel illumination uniformity detection method |
| CN109215026B (en) * | 2018-09-29 | 2022-02-11 | 广东工业大学 | High-speed accurate LED defect detection method based on machine vision |
| CN110470384B (en) * | 2019-06-25 | 2021-09-14 | 人民百业科技有限公司 | Light emitting detection system and detection method of linear light source |
| CN110514406B (en) * | 2019-07-12 | 2021-04-06 | 佛山市青松科技股份有限公司 | Detection method of LED lamp panel, electronic equipment and storage medium |
| CN110441714B (en) * | 2019-07-31 | 2023-03-14 | Tcl王牌电器(惠州)有限公司 | Method and device for detecting indicator light and computer readable storage medium |
| CN112268686A (en) * | 2020-10-22 | 2021-01-26 | 合肥维信诺科技有限公司 | Method and device for measuring optical parameters of curved screen |
| CN112747906B (en) * | 2021-01-28 | 2022-07-22 | 歌尔光学科技有限公司 | Light source detection method, detection device and readable storage medium |
| CN113237636A (en) * | 2021-06-04 | 2021-08-10 | 东莞中之科技股份有限公司 | LED polycrystalline product detection method |
| CN118310719A (en) * | 2024-04-15 | 2024-07-09 | 深圳市咏华宇电子有限公司 | LED illumination quality detection method based on image processing |
| CN118090168B (en) * | 2024-04-28 | 2024-07-12 | 常州星宇车灯股份有限公司 | Method, equipment and medium for detecting luminous quality of penetrating type automobile lamp |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200931000A (en) * | 2008-01-02 | 2009-07-16 | Univ Nat Kaohsiung Applied Sci | Neural network-based two-dimensional luminance measurement method |
| CN101814264A (en) * | 2010-04-02 | 2010-08-25 | 苏州富鑫林光电科技有限公司 | CCD-type optical quality measurement device |
| CN102568426A (en) * | 2012-02-24 | 2012-07-11 | 友达光电股份有限公司 | Method capable of improving 3D (three-dimensional) picture uniformity of liquid crystal display |
| CN102607805A (en) * | 2011-12-14 | 2012-07-25 | 山东大学 | Device and method for testing divergence angle and uniformity of illumination laser by using CCD (Charge Coupled Device) |
| CN103123295A (en) * | 2011-11-18 | 2013-05-29 | 西安中科麦特电子技术设备有限公司 | Light distribution uniformity test control system |
| CN103630332A (en) * | 2013-11-15 | 2014-03-12 | 南京中电熊猫照明有限公司 | Backlight brightness uniformity measuring device and method |
-
2014
- 2014-11-24 CN CN201410678510.4A patent/CN104374551B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200931000A (en) * | 2008-01-02 | 2009-07-16 | Univ Nat Kaohsiung Applied Sci | Neural network-based two-dimensional luminance measurement method |
| CN101814264A (en) * | 2010-04-02 | 2010-08-25 | 苏州富鑫林光电科技有限公司 | CCD-type optical quality measurement device |
| CN103123295A (en) * | 2011-11-18 | 2013-05-29 | 西安中科麦特电子技术设备有限公司 | Light distribution uniformity test control system |
| CN102607805A (en) * | 2011-12-14 | 2012-07-25 | 山东大学 | Device and method for testing divergence angle and uniformity of illumination laser by using CCD (Charge Coupled Device) |
| CN102568426A (en) * | 2012-02-24 | 2012-07-11 | 友达光电股份有限公司 | Method capable of improving 3D (three-dimensional) picture uniformity of liquid crystal display |
| CN103630332A (en) * | 2013-11-15 | 2014-03-12 | 南京中电熊猫照明有限公司 | Backlight brightness uniformity measuring device and method |
Non-Patent Citations (3)
| Title |
|---|
| 基于CCD照度采集合成白光色均匀性测量及分析;姚成宝等;《哈尔滨师范大学自然科学学报》;20091231;第25卷(第5期);全文 * |
| 基于灰度直方图的LED显示屏亮度均匀性评估方法;宋新丽等;《液晶与显示》;20090228;第24卷(第1期);第140页右栏、第141-142页、图1-4 * |
| 白光LED光斑均匀性的改进;徐国芳等;《发光学报》;20080831;第29卷(第4期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104374551A (en) | 2015-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104374551B (en) | LED luminance uniformity detection method and system thereof | |
| KR102178903B1 (en) | Visual inspection device and illumination condition setting method of visual inspection device | |
| CN103217436B (en) | Backlight module group defect detection method and equipment | |
| CN110261390B (en) | Optical detection system and method for surface defects of diffuse reflection structured light | |
| RU2762130C2 (en) | System and related method for measuring optical characteristics of glass sheet on process line | |
| CN103245671B (en) | Stamping parts surface defect detection apparatus and method | |
| CN106851264A (en) | Camera module group lens surface inspecting method and device | |
| KR101630596B1 (en) | Photographing apparatus for bottom of car and operating method thereof | |
| CN103630544B (en) | A kind of vision on-line detecting system | |
| CN103076344A (en) | Defect detection method and device for display panel | |
| CN110567968A (en) | part defect detection method and device | |
| CN106228935A (en) | A kind of method keeping LCD screen brightness uniformity and display device | |
| TWI639977B (en) | Inspection device, inspection method and computer-readable recording medium | |
| RU2696346C2 (en) | Tire production control device on production line | |
| TWI495867B (en) | Application of repeated exposure to multiple exposure image blending detection method | |
| CN104581135A (en) | Light source brightness detection method and system | |
| CN110987970A (en) | Object surface defect detection system and detection method | |
| CN110031482A (en) | A kind of glass flaws detection method based on reflective structure optical illumination | |
| KR101980755B1 (en) | Apparatus for automatic inspection of the color difference mura for the display panel and method for the same | |
| CN104766310A (en) | Light source detecting system and method | |
| TW201516397A (en) | Bubble inspection system for glass | |
| CN101435697B (en) | Method and system for detecting position of through hole | |
| CN114324344A (en) | Non-lambert surface inspection system for line scanning | |
| CN215812367U (en) | Transparent object defect detection device | |
| JP2014052339A (en) | Surface irregularity inspection device and surface irregularity inspection method |
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 |