CN104008727B - LED display heat dissipation uniformity detection method - Google Patents
LED display heat dissipation uniformity detection method Download PDFInfo
- Publication number
- CN104008727B CN104008727B CN201410252324.4A CN201410252324A CN104008727B CN 104008727 B CN104008727 B CN 104008727B CN 201410252324 A CN201410252324 A CN 201410252324A CN 104008727 B CN104008727 B CN 104008727B
- Authority
- CN
- China
- Prior art keywords
- led display
- sprite
- led
- heat dissipation
- point
- 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
Abstract
The present invention relates to a kind of LED display heat dissipation uniformity detection method, it includes step: controls LED display and shows first, second and third sprite；With first, second and third prefixed time interval respectively repeatedly shooting first, second and third sprite that shows of LED display and obtain multiple correspondence not first, second and third detection image in the same time；After treating that first, second and third sprite all shoots, it is analyzed respectively multiple described first, second and third detection images processing the brightness decay information to obtain multiple first color, multiple second color and multiple 3rd color LED point；And the heat dissipation uniformity of the distribution situation assessment LED display according to the brightness decay information of the plurality of first, second and third color LED point.The present invention utilizes the characteristic of LED luminance decay and temperature correlation indirectly to obtain profiling temperatures when LED display shows, thus reaching the purpose of heat dissipation uniformity detection.
Description
Technical field
The present invention relates to display screen detection technique field, particularly to the detection method of LED display heat dissipation uniformity.
Background technology
Due to the uneven reason of heat radiation that production technology, the physical characteristic of device and circuit design cause, various display device ubiquities multi-form display defect, and display effect can be produced impact in various degree by these display defects.Therefore, whether being necessary in the development of display screen and production process dispels the heat to product detects uniformly.Prior art mainly there are two kinds for heat dissipation uniformity detection: (1) adopts infrared temperature instrument, but it needs to carry out two-dimensional scan, line by line, causes that detection efficiency is low；(2) adopt thermal infrared imager, but its range of application is little, cost is high.
Along with the fast development of LED Display Technique, objective, the accurate evaluation of LED display display quality also increasingly come into one's own.LED display supplier expects to obtain image quality evaluation result accurate, comprehensive, the anti-defect looking into manufacturing process, in order to improves LED display quality, improve the market competitiveness；LED display buys the problem that business is also concerned about LED display image quality evaluation in a hurry.Along with LED display industrialization process and the market competition are day by day fierce, the evaluation for LED display picture quality it is also proposed new requirement.
Summary of the invention
Therefore, the present invention proposes a kind of new LED display heat dissipation uniformity detection method.
Specifically, a kind of LED display heat dissipation uniformity detection method that the embodiment of the present invention proposes, including step: control LED display and show the first sprite；Repeatedly shoot, with the first prefixed time interval, described first sprite that described LED display shows and obtain multiple correspondence not the first detection image in the same time；Control LED display and show the second sprite；Repeatedly shoot, with the second prefixed time interval, described second sprite that described LED display shows and obtain multiple correspondence not the second detection image in the same time；Control LED display and show the 3rd sprite；Repeatedly shoot, with the 3rd prefixed time interval, described 3rd sprite that described LED display shows and obtain multiple correspondence not the 3rd detection image in the same time；After treating that described first sprite, described second sprite and described 3rd sprite all shoot, it is analyzed multiple described first detection images processing the brightness decay information to obtain multiple first color LED point, multiple described second detection images are analyzed processing the brightness decay information to obtain multiple second color LED point, and are analyzed multiple described 3rd detection images processing the brightness decay information to obtain multiple 3rd color LED point；And the heat dissipation uniformity of described LED display is assessed according to the distribution situation of the brightness decay information of the plurality of first color LED point, the plurality of second color LED point and the plurality of 3rd color LED point.
As from the foregoing, the embodiment of the present invention utilizes the characteristic of LED luminance decay and temperature correlation, combining image shooting and image analyzing and processing technology obtain the distribution situation of the brightness decay information of each LED point in LED display, indirectly obtain profiling temperatures during LED display display whereby, thus reaching the purpose of heat dissipation uniformity detection.As can be seen here, the heat dissipation uniformity of LED display can be carried out detection and evaluate by the embodiment of the present invention simply and effectively, and LED display producer improves manufacturing process positive facilitation, more practical significance.
By the detailed description below with reference to accompanying drawing, other side and the feature of the present invention become apparent upon.It is understood that this accompanying drawing is only the purpose design of explanation, not as the restriction of the scope of the present invention, this is because it should refer to appended claims.It should also be noted that unless otherwise noted, it is not necessary to scale accompanying drawing, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is a kind of LED display heat dissipation uniformity detection systematic difference schematic diagram of the embodiment of the present invention.
Fig. 2 is the flow chart of steps of a kind of LED display heat dissipation uniformity detection method of the embodiment of the present invention.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Refer to Fig. 1, it is a kind of LED display heat dissipation uniformity detection systematic difference schematic diagram of the embodiment of the present invention.As it is shown in figure 1, LED display heat dissipation uniformity detection system 100 includes the computer 110 being provided with analysis of heat transmission software 111 and the area array cameras 130 being connected with described computer 110 signal.More specifically, computer 110 such as connects the LED display control system (not shown in figure 1) of LED display 300 front end by netting twine or WiFi；Area array cameras 130 is for shooting (namely carrying out image acquisition) to the display picture of LED display 300, the advantage with the bigger picture of single acquisition, it is such as form signal by data wire with computer 110 to be connected, and preferably area array cameras 130 be there is resolution height, the area array CCD camera of the advantage such as dynamic range is big, photoelectric transformation efficiency is high and power consumption is little, but the present invention is not limited thereto.
Flow chart of steps please also refer to a kind of LED display heat dissipation uniformity detection method that Fig. 1 and Fig. 2, Fig. 2 are the embodiment of the present invention.Below in conjunction with Fig. 1 and Fig. 2, the LED display heat dissipation uniformity detection method of the embodiment of the present invention is described in detail, specifically, first run the analysis of heat transmission software 111 being installed on computer 110, be sequentially carried out following steps S11, S13, S15 and S17 afterwards:
Step S11: control LED display 300 and show red picture.Concretely: when LED display 300 is in blank screen, the analysis of heat transmission software 111 in computer 110 send a command to LED display control system and show red picture to control LED display 300；At this, red picture is made up of the multiple red LED lamp lighted points.
Step S13: repeatedly shoot the red picture of LED display 300 display with prefixed time interval and obtain multiple correspondence not detection image in the same time.Concretely, repeatedly shot by the analysis of heat transmission software 111 chain of command array camera 130 in computer 110, such as light at LED display 300 blank screen and chain of command array camera 130 carries out first time shooting immediately after showing red picture, after LED display 300 works such as 5 minutes a period of time, carry out second time shooting, after LED display 300 works such as 5 minutes a period of time again, carry out third time shooting again；Such that it is able to obtain three correspondences not detection image in the same time, these detection images will be sent to computer 110 by area array cameras 130.It should be noted that at this, the number of times of red picture photographing can realize the calculating of the brightness decay information such as brightness decay percentage ratio of red LED lamp point no less than twice, but to reach higher heat dissipation uniformity accuracy of detection, then can consider many shootings several times.Additionally, the interval of shooting can be at equal intervals, it is possible to for unequal interval.
Step S15: be analyzed multiple detection images processing the brightness decay information obtaining the plurality of LED point with the brightness value calculating extracting the multiple LED points in each detection image.Concretely: by the analysis of heat transmission software 111 in computer 110, each detection image transmitted by area array cameras 130 is carried out LED point location, the brightness value of each red LED lamp point is extracted after LED point location, and calculate and obtain each red LED lamp point in not brightness decay information in the same time, such as calculate second time and shoot the attenuation percentage that the brightness value of each red LED lamp point of moment shoots the brightness value of each red LED lamp point of moment relative to first time, and calculate the brightness value attenuation percentage relative to the brightness value of first time shooting each red LED lamp point of moment of third time shooting each red LED lamp point of moment.In the present embodiment, LED point location belongs to the image processing techniques of a kind of maturation, does not repeat them here.
Step S17: assess the heat dissipation uniformity of described LED display according to the distribution situation of the brightness decay information of the plurality of LED point.Concretely: added up the distribution situation of the brightness decay percentage ratio of each red LED lamp point of synchronization by the analysis of heat transmission software 111 in computer 110, for instance the brightness decay percentage ratio of calculated second time shooting each red LED lamp point of moment in step S15 is carried out statistical analysis and/or the brightness decay percentage ratio of calculated third time shooting each red LED lamp point of moment in step S15 is carried out statistical analysis；If some region of red LED lamp point brightness fall at synchronization compared with the brightness fall of whole LED display big (namely brightness decay percentage ratio is bigger than normal), then can learn the height that the temperature in this region rises compared with environment temperature, and then can show that LED display 300 also exists uneven or manufacturing process problem of locally dispelling the heat；If each red LED lamp point of whole LED display 300 is roughly the same at the brightness decay percentage ratio of synchronization, then it is believed that LED display 300 is absent from local dispels the heat the problem such as uneven.
Afterwards, control LED display 300 further and sequentially show green picture, blue picture, and carry out above-mentioned steps S11 to S17 more respectively when the green picture of display and blue picture.It is noted that for red, green, blue picture, it is possible to first carry out step S11 and S13 respectively, treat that three kinds of colored picture carry out step S15 and S17 after all shooting again.Additionally, for different colours picture, the interval that shooting adopts can be the same or different, depending on being actually needed.
Additionally, for full-color LED display screen, owing to the brightness decay of red LED lamp point is fastest, the light tone rate of decay of green LED lamp point is taken second place, the brightness decay speed of blue led lamp point is the slowest, it is thus preferred to ground first controls the LED display red picture of display for shooting and image analysis processing, then show that green picture is for shooting and image analysis processing, finally show that blue picture is for shooting and image analysis processing again.In brief, the display order of sprite is set according to the brightness decay speed of the shades of colour LED point in LED display.
It is noted that the heat dissipation uniformity detection system of the embodiment of the present invention and detection method are not limited to be applied in LED display, it is possible to be applied to other LED display, for instance LED box or even LED lamp panel.
In sum, the embodiment of the present invention utilizes the characteristic of LED luminance decay and temperature correlation, combining image shooting and image analyzing and processing technology obtain the distribution situation of the brightness decay information of each LED point in LED display, indirectly obtain profiling temperatures during LED display display whereby, thus reaching the purpose of heat dissipation uniformity detection.As can be seen here, the heat dissipation uniformity of LED display can be carried out detection and evaluate by the detection system of the embodiment of the present invention and detection method simply and effectively, and LED display producer improves manufacturing process positive facilitation, more practical significance.
So far, principle and the embodiment of LED display heat dissipation uniformity detection method of the present invention and detection system are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention; all will change in specific embodiments and applications; in sum, this specification content should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (6)
1. a LED display heat dissipation uniformity detection method, it is characterised in that include step:
Control LED display and show the first sprite；
Repeatedly shoot, with the first prefixed time interval, described first sprite that described LED display shows and obtain multiple correspondence not the first detection image in the same time；
Control LED display and show the second sprite；
Repeatedly shoot, with the second prefixed time interval, described second sprite that described LED display shows and obtain multiple correspondence not the second detection image in the same time；
Control LED display and show the 3rd sprite；
Repeatedly shoot, with the 3rd prefixed time interval, described 3rd sprite that described LED display shows and obtain multiple correspondence not the 3rd detection image in the same time；
After treating that described first sprite, described second sprite and described 3rd sprite all shoot, it is analyzed multiple described first detection images processing the brightness decay information to obtain multiple first color LED point, multiple described second detection images are analyzed processing the brightness decay information to obtain multiple second color LED point, and are analyzed multiple described 3rd detection images processing the brightness decay information to obtain multiple 3rd color LED point；And
The distribution situation of the brightness decay information according to the plurality of first color LED point, the plurality of second color LED point and the plurality of 3rd color LED point assesses the heat dissipation uniformity of described LED display.
2. LED display heat dissipation uniformity detection method as claimed in claim 1, it is characterised in that described control LED display shows that the step of the first sprite includes:
Control described LED display to light multiple first color LED point and obtain described first sprite.
3. LED display heat dissipation uniformity detection method as claimed in claim 2, it is characterized in that, described first color LED point, the second color LED point and the 3rd color LED point are respectively selected from the one of red LED lamp point, green LED lamp point and blue led lamp point.
4. LED display heat dissipation uniformity detection method as claimed in claim 1, it is characterized in that, described repeatedly shoot, with the first prefixed time interval, described first sprite that described LED display shows and obtain the step of multiple correspondence not the first detection image in the same time and include:
Chain of command array camera repeatedly shoots, with the first prefixed time interval, described first sprite that described LED display shows and obtains multiple correspondence not the first detection image in the same time.
5. LED display heat dissipation uniformity detection method as claimed in claim 4, it is characterised in that described area array cameras is area array CCD camera.
6. LED display heat dissipation uniformity detection method as claimed in claim 1, it is characterized in that, described first sprite, described second sprite and described 3rd sprite sequentially show, described first sprite is red picture and shows prior to described second sprite and the 3rd sprite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410252324.4A CN104008727B (en) | 2014-06-09 | 2014-06-09 | LED display heat dissipation uniformity detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410252324.4A CN104008727B (en) | 2014-06-09 | 2014-06-09 | LED display heat dissipation uniformity detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104008727A CN104008727A (en) | 2014-08-27 |
| CN104008727B true CN104008727B (en) | 2016-06-29 |
Family
ID=51369356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410252324.4A Active CN104008727B (en) | 2014-06-09 | 2014-06-09 | LED display heat dissipation uniformity detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104008727B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107578748B (en) * | 2017-09-25 | 2020-03-24 | 联想(北京)有限公司 | Display apparatus and display control method |
| CN108345134A (en) * | 2018-01-11 | 2018-07-31 | 福建联迪商用设备有限公司 | The test method and intelligent object of display function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441850A (en) * | 2008-12-29 | 2009-05-27 | 长春希达电子技术有限公司 | Method and apparatus for collecting display parameter of display screen based on identification pattern sequence |
| CN101950515A (en) * | 2010-08-20 | 2011-01-19 | 深圳市中庆微科技开发有限公司 | Master-slave point-by-point correcting method for LED display screen |
| CN102005181A (en) * | 2010-11-19 | 2011-04-06 | 深圳市金立翔光电科技有限公司 | Standard dot matrix light source and image point correction method of LED display screen |
| CN103985335A (en) * | 2014-06-05 | 2014-08-13 | 西安诺瓦电子科技有限公司 | LED (Light Emitting Diode) display device heat dissipation uniformity detection method, detection device and detection system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7379042B2 (en) * | 2003-11-21 | 2008-05-27 | Au Optronics Corporation | Method for displaying images on electroluminescence devices with stressed pixels |
| US7847764B2 (en) * | 2007-03-15 | 2010-12-07 | Global Oled Technology Llc | LED device compensation method |
-
2014
- 2014-06-09 CN CN201410252324.4A patent/CN104008727B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441850A (en) * | 2008-12-29 | 2009-05-27 | 长春希达电子技术有限公司 | Method and apparatus for collecting display parameter of display screen based on identification pattern sequence |
| CN101950515A (en) * | 2010-08-20 | 2011-01-19 | 深圳市中庆微科技开发有限公司 | Master-slave point-by-point correcting method for LED display screen |
| CN102005181A (en) * | 2010-11-19 | 2011-04-06 | 深圳市金立翔光电科技有限公司 | Standard dot matrix light source and image point correction method of LED display screen |
| CN103985335A (en) * | 2014-06-05 | 2014-08-13 | 西安诺瓦电子科技有限公司 | LED (Light Emitting Diode) display device heat dissipation uniformity detection method, detection device and detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104008727A (en) | 2014-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106780521B (en) | Screen light leakage detection method, system and device | |
| CN104135660B (en) | A kind of dirty detection method of camera module and detection system | |
| CN101770646B (en) | Edge detection method based on Bayer RGB images | |
| JP6325520B2 (en) | Unevenness inspection system, unevenness inspection method, and unevenness inspection program | |
| CN103020924B (en) | Low-illumination monitored image enhancement method based on similar scenes | |
| CN112396999B (en) | Abnormal display block detection method, display screen fault detection method and equipment thereof | |
| CN106372701B (en) | A kind of coding of optical label and recognition methods | |
| CN104200775A (en) | LED defective pixel treatment method | |
| CN113191988B (en) | Brightness correction method and device, storage medium and electronic device | |
| CN104639923A (en) | Method and device for processing image data, and terminal | |
| KR101941585B1 (en) | Embedded system for examination based on artificial intelligence thereof | |
| CN102567722A (en) | Early-stage smoke detection method based on codebook model and multiple features | |
| CN104008727B (en) | LED display heat dissipation uniformity detection method | |
| CN105872511B (en) | The method that flat panel TV colour temperature uniformity is improved using a plurality of gamma | |
| CN102879404A (en) | System for automatically detecting medical capsule defects in industrial structure scene | |
| CN105744261B (en) | The test system and method for testing of set top box front panel | |
| CN103985335B (en) | LED display heat dissipation uniformity detection method and detection device | |
| CN104184954B (en) | Optical detection apparatus and its synchronization adjustment method | |
| CN109936713A (en) | Method and apparatus for being decoded to the information that light source transmits | |
| CN208903644U (en) | A kind of brightness point by point coloration acquisition correction device for small space distance LED display screen | |
| US9672768B2 (en) | Luminance-chrominance calibration production line of LED display module | |
| CN109932160B (en) | AOI and gray scale meter detection system and method | |
| CN105915814B (en) | A kind of method and system of controlling terminal screen light filling | |
| KR102589555B1 (en) | Method for selecting spectral bandwidth of hyperspectral image and spectral bandwidth selection apparatus using the same | |
| US20200275091A1 (en) | Display apparatus, apparatus for proof of play, and method for proof of play of contents |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180209 Address after: High tech Zone technology two road 710075 Shaanxi city of Xi'an Province, No. 68 Xi'an Software Park Patentee after: Xian Novastar Electronic Technology Co., Ltd. Address before: Taibai Road Shaanxi Yanta District 710071 city of Xi'an province No. 2 Patentee before: Xidian University |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 710075 DEF101, Zero One Square, Xi'an Software Park, No. 72 Zhangbajie Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Patentee after: XI'AN NOVASTAR TECH Co.,Ltd. Address before: 710075 qinfengge, Xi'an Software Park, No. 68, Keji Second Road, high tech Zone, Xi'an, Shaanxi Province Patentee before: Xi'an NovaStar Tech Co.,Ltd. |