CN104637425A - Assembly-line LED (light emitting diode) display unit uniformity detection method, system and device - Google Patents
Assembly-line LED (light emitting diode) display unit uniformity detection method, system and device Download PDFInfo
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- CN104637425A CN104637425A CN201510064432.3A CN201510064432A CN104637425A CN 104637425 A CN104637425 A CN 104637425A CN 201510064432 A CN201510064432 A CN 201510064432A CN 104637425 A CN104637425 A CN 104637425A
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Abstract
The invention relates to an assembly-line LED (light emitting diode) display unit uniformity detection method, system and device. The method comprises the steps: (a) acquiring a serial number of an LED display unit flowing through a preset position of an assembly line; (b) acquiring multiple different color images of the corresponding LED display unit and obtaining brightness information of the multiple different color images; (c) processing and analyzing the brightness information to obtain a display uniformity index of the LED display unit, wherein the display uniformity index comprises one of a death lamp index, a brightness and chrominance dispersion index and overall brightness and chrominance index; (d) correlating and storing the serial number and the display uniformity index of the LED display unit. The display uniformity index is acquired by virtue of the assembly line way, so that the delivery quality of a product can be improved, reference information can be provided for the subsequent production, and the assembly-line LED display unit uniformity detection method also has characteristics that the manpower and material resource can be saved, the efficiency can be improved, the automation degree can be increased, and the like.
Description
Technical field
The present invention relates to LED technology field, particularly a kind of pipeline system LED display unit uniformity detecting method, a kind of pipeline system LED display unit homogeneity detection system and a kind of uniformity detection.
Background technology
Since 21 century, colored display industry is developed on an unprecedented scale, and LED display has also spread all over central plaza, the commercial mansion in each city.LED display enjoys people's favorable comment with its distinctive advantage such as high, low in energy consumption bright in luster, visual, but due to domestic LED display manufacturing technology level lower, the LED self produced is made to there is larger bright chroma difference (such as same production batch LED, its brightness may differ nearly 50%, colourity may differ 15 ~ 20nm), and the display screen that multiple different production batch LED splices, its bright chroma difference is just more serious.These bright chroma differences are intolerable for human eye vision, thus new production or the LED display that uses year in year out need to carry out effective bright chroma adjustment.
Two kinds are mainly contained for the LED display processing mode that there is bright chroma difference: 1) utilize the measuring equipment such as camera, chromascope to correct display screen in conjunction with point-to-point correction system in current LED display industry, eliminate the bright chroma difference between LED point, reach the high uniformity consistance of display screen bright chroma.Although the device measuring such as camera, chromascope to correct efficiency very high, its measuring accuracy will lower than human visual system, so directly still may can perceive slight bright chroma difference through the LED display of pointwise correction; 2) based on the manual adjustments mode of human eye vision, the bright chroma difference of LED display is judged by eye-observation, and then manually set correction target value, utilize the means of similar correction to regulate the penalty coefficient of LED point, make LED display seem bright chroma uniformity.Although this manual adjustments mode can reach human eye vision requirement, it regulates efficiency very low, greatly increases adjustment and expends time in, and is difficult to meet actual application demand.
Current LED display (or casing etc.) corrects to be divided into straightened up in place and to produce line and corrects, and wherein correction in process of production is then referred to as to produce line and corrects.Conventional LED box production line can be divided into following flow process: determine that the bill of materials, module (LED lamp panel) production procedure, casing assembling are aging, wherein module production procedure can be divided into: paster, plug-in unit, wave-soldering, rear weldering, test, semi-manufacture are aging, the assembling of module external member and encapsulating, finished product module group aging is with obtained LED lamp panel; In addition, after LED lamp panel, bright chroma correction is carried out in extended meeting.
But, existing product line cannot understand the LED lamp panel bright chroma homogeneity of harsh output how, whether the LED lamp panel that cannot understand harsh output qualified, the own manufacture craft of LED lamp panel that harsh output cannot be understood how, more information cannot be provided for production afterwards and more information cannot be provided for correction afterwards.
Summary of the invention
Therefore, for deficiency of the prior art, the invention provides a kind of pipeline system LED display unit uniformity detecting method, a kind of pipeline system LED display unit homogeneity detection system and a kind of uniformity detection.
Particularly, a kind of pipeline system LED display unit uniformity detecting method that the embodiment of the present invention provides comprises step: (a) obtains the numbering flowing through the LED display unit of the predeterminated position of streamline; B () gathers multiple different colours image of corresponding described LED display unit and obtains the bright chroma information of described multiple different colours image; C () carries out to described bright chroma information the show uniformity index that Treatment Analysis obtains described LED display unit, wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum; And the described numbering of LED display unit described in (d) association store and described show uniformity index.
In one embodiment of the invention, above-mentioned steps (a) comprising: after the LED display unit predeterminated position flowing through streamline being detected, distributes the numbering that set in advance or carry out automatic numbering to obtain the described numbering of described LED display unit to described LED display unit for described LED display unit.
In another embodiment of the present invention, above-mentioned steps (a) comprising: gather described LED display unit with bar code to obtain the described numbering of described LED display unit.
In one embodiment of the invention, above-mentioned steps (b) comprising: utilize camera to take the tristimulus image obtaining corresponding described LED display unit respectively, and obtains the bright chroma information of described tristimulus image.
In one embodiment of the invention, in above-mentioned steps (c), described bright chroma dispersion index is that the bright chroma variance or bright chroma standard deviation by calculating described LED display unit obtains, and described overall bright chroma index is obtained by the bright chroma arithmetic mean calculating described LED display unit.
In one embodiment of the invention, above-mentioned steps (d) comprising: the described numbering of described LED display unit and described show uniformity exponential association are stored in the storer on described LED display unit.
In one embodiment of the invention, above-mentioned pipeline system LED display unit uniformity detecting method also comprises step: more described dead modulation index and the dead lamp rate threshold value preset, and using comparative result as the foundation whether rejecting described LED display unit.
In one embodiment of the invention, above-mentioned LED display unit is LED lamp panel or the LED box comprising multiple LED lamp panel be stitched together.
In addition, a kind of pipeline system LED display unit homogeneity detection system that the embodiment of the present invention provides, comprises streamline and is arranged on the monitor station on streamline.Described monitor station comprises: sensing cell, camera and computer system.Wherein, whether sensing cell has LED display unit flow through the predeterminated position of described streamline and produce sensing signal when sensing has LED display unit to flow through described predeterminated position for sensing; Camera is for gathering multiple different colours images of corresponding described LED display unit; And computer system signal connects described sensing cell and described camera, for obtain according to described sensing signal described LED display unit numbering, described multiple color image carried out to Treatment Analysis and obtains the described numbering of LED display unit described in the show uniformity index of described LED display unit and association store and described show uniformity index, wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum.
In addition, the another kind of pipeline system LED display unit homogeneity detection system that the embodiment of the present invention provides, comprises streamline and is arranged on the monitor station on streamline.Described monitor station comprises: bar code harvester, camera and computer system.Wherein, bar code harvester be used for acquisition stream through the predeterminated position of streamline LED display unit with bar code to produce collection result signal; Camera is for gathering multiple different colours images of corresponding described LED display unit; And computer system, signal connects described bar code harvester and described camera, for the numbering of LED display unit according to described collection result signal acquisition, described multiple color image carried out to Treatment Analysis and obtain the described numbering of LED display unit described in the show uniformity index of described LED display unit and association store and described show uniformity index, wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum.
Moreover, a kind of uniformity detection that the embodiment of the present invention provides, be applied to pipeline system LED display unit homogeneity detection system, described pipeline system LED display unit homogeneity detection system comprises streamline and is arranged on the monitor station on described streamline, and described monitor station comprises described uniformity detection and camera; It is characterized in that, described uniformity detection comprises: numbering module, image capture module, data analysis module, memory module and control module.Wherein, numbering module is for obtaining the numbering of the LED display unit of the predeterminated position flowing through described streamline; Image capture module takes for controlling described camera the multiple different colours image the bright chroma information obtaining described multiple different colours image that obtain corresponding described LED display unit; Data analysis module is used for carrying out to described bright chroma information the show uniformity index that Treatment Analysis obtains described LED display unit, and wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum; Memory module is used for the described numbering of LED display unit described in association store and described show uniformity index; And control module is for controlling the operation of described streamline and controlling described numbering module, described image capture module, described data analysis module, the operation of described memory module and mutual.
In one embodiment of the invention, above-mentioned uniformity detection also comprises: evaluation module, for more described dead modulation index and the dead lamp rate threshold value preset and using comparative result as the foundation whether rejecting described LED display unit.
Therefore, the above embodiment of the present invention, by carrying out show uniformity detection to LED display unit in a pipeline fashion, can obtain the show uniformity indexes such as dead modulation index (such as dead lamp rate), bright chroma dispersion index and/or overall bright chroma index; Wherein, underproof LED display unit can be rejected by dead modulation index, improve the outgoing of LED display unit; By bright chroma discreteness index can allow user learn the manufacture craft of LED display unit how, how etc. LED light chrominance information, improve manufacture craft for producer and provide more information, promote it and improve manufacture craft; More information can be provided for correction afterwards by overall bright chroma index.In addition, the above embodiment of the present invention also can have and uses manpower and material resources sparingly, raises the efficiency and the features such as automaticity.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, 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 the process flow diagram of a kind of pipeline system LED display unit uniformity detecting method of the embodiment of the present invention.
Fig. 2 is the configuration diagram of a kind of pipeline system LED display unit homogeneity detection system of the embodiment of the present invention.
Fig. 3 is the configuration diagram of a kind of pipeline system LED display unit homogeneity detection system of another embodiment of the present invention.
Fig. 4 is the high-level schematic functional block diagram of a kind of uniformity detection of the embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Refer to Fig. 1 and Fig. 2, wherein Fig. 1 is the process flow diagram of a kind of pipeline system LED display unit uniformity detecting method of the embodiment of the present invention, and Fig. 2 is the configuration diagram of a kind of pipeline system LED display unit homogeneity detection system of the embodiment of the present invention.Particularly:
A kind of pipeline system LED display unit uniformity detecting method that the embodiment of the present invention provides comprises the following steps S11, S13, S15 and S17.Wherein,
Step S11: obtain the numbering flowing through the LED display unit of the predeterminated position of streamline.
In the present embodiment, on automatic production line 21, multiple LED display unit 100 is had automatically to advance on streamline 21, such as automatically advanced a LED display unit 100 to enter monitor station every 15 seconds, at monitor station: be first the predeterminated position (such as the sense position of sensing cell 23) that sensing cell 23 senses under the control of computer system 27 whether LED display unit 100 flows through streamline 21, if sensing has LED display unit 100 to flow through described predeterminated position, produce sensing signal to computer system 27, obtained the numbering of described LED display unit 100 according to described sensing signal by the homogeneity inspection software being arranged on computer system 27, the numbering obtaining LED display unit 100 at this can be following several mode: set numbering corresponding to each LED display unit or be automatically numbered the LED display unit flowed through in advance.
Step S13: gather multiple different colours image of corresponding described LED display unit and obtain the bright chroma information of described multiple different colours image.
In the present embodiment, at monitor station, the multiple different colours images obtaining the LED display unit that correspondence senses taken by camera 25 under the control of computer system 27.For RGB (RGB) full-color LED display unit, described multiple different colours image can be red-green-blue image (being also the monochrome images such as red image, green image and blue image) respectively, but the present invention is not as limit, such as dual-colored LED display unit, it can be two primary color images, and for more multi-colored led display unit, it can be again four primary image.After shooting obtains multiple different colours image, these images are delivered to computer system 27 and are carried out processing to obtain corresponding bright chroma information.At this, camera 25 can be the industrial camera of band XYZ filter disc, and computer system 27 directly can obtain corresponding light tone angle value Lxy when processing these images; Camera 25 also can be common color digital camera, computer system 27 first obtains the RGB numerical value of each LED point when processing these images, then RGB numerical value is changed into XYZ numerical value, and then obtain corresponding light tone angle value Lxy, and conversion method wherein can be: modelling, look-up table (LUT, Look up Table), neural network etc.
S15: carry out the show uniformity index that Treatment Analysis obtains described LED display unit to described bright chroma information, wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum.
In the present embodiment, the bright chroma information that the different colours image obtained above-mentioned shooting by the homogeneity inspection software in computer system 27 is corresponding carries out Treatment Analysis, such as carry out dead lamp analysis, bright chroma dispersion analyzes and/or overall bright chroma is analyzed etc., exports dead modulation index, bright chroma dispersion index and/or overall bright chroma index accordingly.At this, dead modulation index is such as dead lamp rate, and also namely bad LED point accounts for the ratio of all LED points on whole LED display unit 100; Bright chroma discreteness index is such as can represent that the algorithm of data discrete degree obtains by calculating the bright chroma variance of LED display unit 100 or bright chroma standard deviation etc.; Overall bright chroma index is such as that the bright chroma arithmetic mean by calculating LED display unit 100 obtains.
S17: the described numbering of LED display unit described in association store and described show uniformity index.
In the present embodiment, after the numbering obtaining LED display unit 100 and corresponding show uniformity index, numbered by computer system 27 and carried out association store with show uniformity index.And for the position of association store, it can be in the local file of computer system 27, also can be in the storer on LED display unit 100.
In addition, in the present embodiment, an appraisal procedure can also be carried out, also i.e. more dead modulation index and the dead lamp rate threshold value preset, and using comparative result as the foundation whether rejecting LED display unit 100.Such as, when dead modulation index (such as dead lamp rate) is greater than described threshold value, then think that the dead lamp of this LED display unit 100 is serious, can not apply, then should give rejecting.
Refer to Fig. 3, a kind of pipeline system LED display unit homogeneity detection system 30 of another embodiment of the present invention, the key distinction of itself and system shown in Figure 2 20 is: the sensing cell 23 in Fig. 2 is replaced to bar code harvester 33.Correspondingly, carry out bar code collection to produce collection result signal to computer system 37 when LED display unit 100 flows through predeterminated position (such as bar code harvester 33 position) of streamline 31 by bar code harvester 33 pairs of LED display units 100, undertaken by computer system 37 pairs of collection result signals resolving the numbering that can obtain this LED display unit 100.At this, bar code harvester 33 can be barcode scanner, and it scans the entity bar code be pasted on LED display unit 100 (such as one-dimension code or even Quick Response Code) and obtain collection result signal; Certainly, bar code harvester 33 can be also rf readers, and corresponding with radio-frequency (RF) tag on LED display unit 100.As for camera 35, its configuration with the camera 25 in Fig. 2 and operate identical, does not repeat them here.
Refer to Fig. 4, it is the high-level schematic functional block diagram of a kind of uniformity detection of the embodiment of the present invention.In the diagram, uniformity detection 40 can be mounted in the homogeneity inspection software in the computer system 20 or 30 in earlier figures 2 or Fig. 3, thus can be applicable to the pipeline system LED display unit homogeneity detection system 20 or 30 shown in Fig. 2 or Fig. 3.Particularly, uniformity detection 40 comprises: numbering module 41, image capture module 43, data analysis module 45, memory module 47 and control module 49.Wherein, numbering module 41 such as associates with the sensing cell 23 in Fig. 2 or the bar code harvester 33 in Fig. 3, for obtaining the numbering of the LED display unit of the predeterminated position flowing through streamline; Image capture module 43 takes for controlling camera the multiple different colours image the bright chroma information obtaining described multiple different colours image that obtain corresponding LED display unit; Data analysis module 45 is for carrying out to described bright chroma information the show uniformity index that Treatment Analysis obtains described LED display unit, and wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum; Memory module 47 is for the described numbering of LED display unit described in association store and described show uniformity index; And control module 49 for control flow check waterline (in such as Fig. 2 21 or Fig. 3 in 31) operation and control the operation and alternately of numbering module 41, image capture module 43, data analysis module 45, memory module 47.
Further, the uniformity detection 40 of the embodiment of the present invention can also comprise evaluation module (not shown), for more dead modulation index and the dead lamp rate threshold value preset and using comparative result as the foundation whether rejecting described LED display unit; Such as when dead modulation index (such as dead lamp rate) is greater than described threshold value, then think that the dead lamp of LED display unit 100 is serious, can not apply, then should give rejecting.
In addition, it is worth mentioning that, the LED display unit of the above embodiment of the present invention can be LED lamp panel, comprise the LED box of multiple LED lamp panel be stitched together, and can also be even LED display.
In sum, the above embodiment of the present invention, by carrying out show uniformity detection to LED display unit in a pipeline fashion, can obtain the show uniformity indexes such as dead modulation index (such as dead lamp rate), bright chroma dispersion index and/or overall bright chroma index; Wherein, underproof LED display unit can be rejected by dead modulation index, improve the outgoing of LED display unit; By bright chroma discreteness index can allow user learn the manufacture craft of LED display unit how, how etc. LED light chrominance information, improve manufacture craft for producer and provide more information, promote it and improve manufacture craft; More information can be provided for correction afterwards by overall bright chroma index.In addition, the above embodiment of the present invention also can have and uses manpower and material resources sparingly, raises the efficiency and the features such as automaticity.
Apply specific case herein to set forth the principle of pipeline system LED display unit uniformity detecting method of the present invention and system and uniformity detection and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description 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 (12)
1. a pipeline system LED display unit uniformity detecting method, is characterized in that, comprises step:
A () obtains the numbering flowing through the LED display unit of the predeterminated position of streamline;
B () gathers multiple different colours image of corresponding described LED display unit and obtains the bright chroma information of described multiple different colours image;
C () carries out to described bright chroma information the show uniformity index that Treatment Analysis obtains described LED display unit, wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum; And
The described numbering of LED display unit described in (d) association store and described show uniformity index.
2. pipeline system LED display unit uniformity detecting method as claimed in claim 1, it is characterized in that, described step (a) comprising:
After the LED display unit predeterminated position flowing through streamline being detected, distribute for described LED display unit the numbering that set in advance or automatic numbering is carried out to obtain the described numbering of described LED display unit to described LED display unit.
3. pipeline system LED display unit uniformity detecting method as claimed in claim 1, it is characterized in that, described step (a) comprising:
Gather described LED display unit with bar code to obtain the described numbering of described LED display unit.
4. pipeline system LED display unit uniformity detecting method as claimed in claim 1, it is characterized in that, described step (b) comprising:
Utilize camera to take the tristimulus image obtaining corresponding described LED display unit respectively, and obtain the bright chroma information of described tristimulus image.
5. pipeline system LED display unit uniformity detecting method as claimed in claim 1, it is characterized in that, in described step (c), described bright chroma dispersion index is that the bright chroma variance or bright chroma standard deviation by calculating described LED display unit obtains, and described overall bright chroma index is obtained by the bright chroma arithmetic mean calculating described LED display unit.
6. pipeline system LED display unit uniformity detecting method as claimed in claim 1, it is characterized in that, described step (d) comprising:
The described numbering of described LED display unit and described show uniformity exponential association are stored in the storer on described LED display unit.
7. pipeline system LED display unit uniformity detecting method as claimed in claim 1, is characterized in that, also comprise step:
More described dead modulation index and the dead lamp rate threshold value preset, and using comparative result as the foundation whether rejecting described LED display unit.
8. pipeline system LED display unit uniformity detecting method as claimed in claim 1, it is characterized in that, described LED display unit is LED lamp panel or the LED box comprising multiple LED lamp panel be stitched together.
9. a pipeline system LED display unit homogeneity detection system, is characterized in that, comprise streamline and be arranged on the monitor station on described streamline, described monitor station comprises:
Whether sensing cell, have LED display unit flow through the predeterminated position of described streamline and produce sensing signal when sensing has LED display unit to flow through described predeterminated position for sensing;
Camera, for gathering multiple different colours images of corresponding described LED display unit;
Computer system, signal connects described sensing cell and described camera, for obtain according to described sensing signal described LED display unit numbering, described multiple color image carried out to Treatment Analysis and obtains the described numbering of LED display unit described in the show uniformity index of described LED display unit and association store and described show uniformity index, wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum.
10. a pipeline system LED display unit homogeneity detection system, is characterized in that, comprise streamline and be arranged on the monitor station on described streamline, described monitor station comprises:
Bar code harvester, for acquisition stream through the predeterminated position of streamline LED display unit with bar code to produce collection result signal;
Camera, for gathering multiple different colours images of corresponding described LED display unit;
Computer system, signal connects described bar code harvester and described camera, for the numbering of LED display unit according to described collection result signal acquisition, described multiple color image carried out to Treatment Analysis and obtain the described numbering of LED display unit described in the show uniformity index of described LED display unit and association store and described show uniformity index, wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum.
11. 1 kinds of uniformity detections, be applied to pipeline system LED display unit homogeneity detection system, described pipeline system LED display unit homogeneity detection system comprises streamline and is arranged on the monitor station on described streamline, and described monitor station comprises described uniformity detection and camera; It is characterized in that, described uniformity detection comprises:
Numbering module, for obtaining the numbering of the LED display unit of the predeterminated position flowing through described streamline;
Image capture module, takes for controlling described camera the multiple different colours image the bright chroma information obtaining described multiple different colours image that obtain corresponding described LED display unit;
Data analysis module, for carrying out to described bright chroma information the show uniformity index that Treatment Analysis obtains described LED display unit, wherein said show uniformity index comprises at least one in dead modulation index, the overall bright chroma index of bright chroma dispersion exponential sum;
Memory module, for described numbering and the described show uniformity index of LED display unit described in association store; And
Control module, for controlling the operation of described streamline and controlling described numbering module, described image capture module, described data analysis module, the operation of described memory module and mutual.
12. uniformity detections as claimed in claim 11, it is characterized in that, described uniformity detection also comprises:
Evaluation module, for more described dead modulation index and the dead lamp rate threshold value preset and using comparative result as the foundation whether rejecting described LED display unit.
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| CN107271145A (en) * | 2017-05-19 | 2017-10-20 | 西安诺瓦电子科技有限公司 | The detection method and system of display unit |
| CN107271145B (en) * | 2017-05-19 | 2020-09-18 | 西安诺瓦星云科技股份有限公司 | Detection method and system of display unit |
| CN109712548A (en) * | 2019-02-22 | 2019-05-03 | 深圳市晶讯软件通讯技术有限公司 | The method and tooling of intelligent lamp coloration and brightness uniformity detection and correction |
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| CN110009607B (en) * | 2019-03-25 | 2021-10-26 | 深圳市洲明科技股份有限公司 | Display screen dead pixel detection method and device, computer equipment and storage medium |
| CN110738651A (en) * | 2019-10-17 | 2020-01-31 | 国网四川省电力公司电力科学研究院 | multi-mode multi-target dynamic indicator lamp batch detection method |
| CN110738651B (en) * | 2019-10-17 | 2022-07-01 | 国网四川省电力公司电力科学研究院 | Method for detecting dynamic indicator lamps in batches under multi-mode and multi-target conditions |
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