CN212459460U - Micro LED display defect detection device - Google Patents
Micro LED display defect detection device Download PDFInfo
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- CN212459460U CN212459460U CN202023208215.2U CN202023208215U CN212459460U CN 212459460 U CN212459460 U CN 212459460U CN 202023208215 U CN202023208215 U CN 202023208215U CN 212459460 U CN212459460 U CN 212459460U
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Abstract
The utility model discloses a Micro LED display defect detection device, which sends a synchronous imaging instruction to a photoelectric detection module through a control circuit board; the photoelectric detection module is connected with the control circuit board, responds to a synchronous imaging instruction, respectively acquires the area image and the corresponding image number of the Micro LED display to be detected through the plurality of industrial cameras, and sends the area image and the image number of each channel to the image processing module; the image processing module is connected with the photoelectric detection module, receives images and image numbers of all channel regions, outputs a defect detection result, can realize detection of pixel levels of the Micro LED display, is high in detection precision of the Micro LED display, can realize full-width imaging of the Micro LED display, is large in view field, high in detection efficiency, real-time in detection data, and meets the detection requirement of industrial production.
Description
Technical Field
The utility model relates to a panel detects technical field, especially relates to a Micro LED display defect detecting device.
Background
The Micro LED is a new generation display technology, and after a huge amount of transfer is carried out, in order to improve and ensure the yield of the Micro LED display, the detection and repair technology is an indispensable key step in the manufacturing process; however, this is still a difficult challenge for manufacturers working on Micro LED displays to detect and repair the huge number of tiny Micro LED chips; traditional LED tests, including Photoluminescence tests (PL), are based on ultraviolet Photoluminescence detection, and can test LED chips without damage and contact, but generally can only detect LED chips with a size of 50 or more, and when an object to be detected is too small, a large careless mistake occurs; in addition, most of the detection of Micro LEDs in the market at present is an indirect detection mode or a mode of local imaging and then scanning, and accurate and real-time data cannot be obtained.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a Micro LED display defect detecting device, when aiming at solving and detecting the Micro LED display among the prior art too little, it is poor to detect the precision, and detects the technical problem that data does not have the real-time.
The utility model provides a Micro LED display defect detection device, Micro LED display defect detection device includes:
the control circuit board is used for sending a synchronous imaging instruction to the photoelectric detection module;
the photoelectric detection module is connected with the control circuit board and used for responding to the synchronous imaging instruction, respectively acquiring the area image and the corresponding image number of the Micro LED display to be detected through a plurality of industrial cameras and sending the area image and the image number of each channel to the image processing module;
the image processing module is connected with the photoelectric detection module and used for receiving the area images and the image numbers of the channels and outputting a defect detection result.
Optionally, the photodetection module comprises:
a carrier, a control power supply, an industrial camera;
the carrier is used for carrying and vacuum-absorbing the Micro LED display to be detected;
the control power supply is used for lighting the Micro LED display to be detected, and the voltage of the control power supply is matched with the reference voltage of the Micro LED display to be detected;
the industrial camera is used for shooting the area image of the Micro LED display to be detected.
Optionally, the industrial camera comprises an imaging control structure and a double telecentric lens, the imaging control structure and the double telecentric lens are combined into the industrial camera, and the number of the industrial camera is matched with the divided region of the Micro LED display to be detected.
Optionally, the image processing module is further configured to send a trigger signal to the control circuit board, so that the control circuit board triggers the synchronous imaging instruction again.
Optionally, the control circuit board is further configured to send a pulse exposure instruction to the photodetection module;
the photoelectric detection module is further used for synchronously shooting the area image of the Micro LED display to be detected according to the pulse exposure instruction.
Optionally, the control circuit board is an FPGA control circuit board.
Optionally, the detection environment of the Micro LED display to be detected is a darkroom with dust density smaller than a preset density.
Optionally, the cameras are arranged according to a preset camera arrangement rule.
Optionally, the area image comprises a sample area imaging image and an edge image;
the image processing module includes: the cutting module and the detection module;
the cutting module is used for receiving the area images of all the channels and outputting the sample area imaging images of all the channels;
the detection module is connected with the cutting module and used for receiving the sample area imaging images of all channels and outputting a defect detection result.
Optionally, the Micro LED display defect detecting device further includes: an alarm module;
the alarm module is connected with the control power supply and used for giving an alarm when the power supply voltage of the control power supply is subjected to temperature drift.
The utility model provides a Micro LED display defect detection device, through the control circuit board, is used for sending the synchronous imaging instruction to the photoelectric detection module; the photoelectric detection module is connected with the control circuit board and used for responding to the synchronous imaging instruction, respectively acquiring the area image and the corresponding image number of the Micro LED display to be detected through a plurality of industrial cameras and sending the area image and the image number of each channel to the image processing module; the image processing module is connected with the photoelectric detection module and used for receiving the regional images of the channels and the image numbers and outputting a defect detection result, pixel-level detection of the Micro LED display can be realized, the detection precision of the Micro LED display is high, full-width imaging of the Micro LED display can be realized, the view field is large, the detection efficiency is high, the detection data has real-time performance, and the detection requirement of industrial production is met.
Drawings
FIG. 1 is a schematic diagram of a functional module of the Micro LED display defect detection device of the present invention;
FIG. 2 is a schematic diagram of the defect detection device for Micro LED display of the present invention;
fig. 3 is an illustration of the camera arrangement of the Micro LED display defect detecting device of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of functional modules of the Micro LED display defect detecting device of the present invention.
As shown in fig. 1, the Micro LED display defect detecting apparatus includes:
and the control circuit board 10 is used for sending a synchronous imaging instruction to the photoelectric detection module.
It should be noted that after the control circuit board obtains the photographing triggering instruction of the camera, the synchronous time difference can be calculated, so that a synchronous imaging instruction is generated to the photoelectric detection module, and synchronous imaging of a plurality of industrial cameras is adjusted.
The photoelectric detection module 20 is connected to the control circuit board 10, and is configured to obtain, in response to the synchronous imaging instruction, an area image and a corresponding image number of the Micro LED display to be detected by a plurality of industrial cameras, and send the area image and the image number of each channel to the image processing module.
The method includes the steps that a photoelectric detection module is used for conducting electroluminescence test on a Micro LED display to be detected, the photoelectric detection module comprises a plurality of industrial cameras, regional images of the Micro LED display to be detected are obtained through the industrial cameras respectively, the regional images are corresponding collected images of regions pre-divided by the Micro LED display to be detected, different industrial cameras correspond to different imaging channels, different regional images correspond to different image numbers, and the regional images and the image numbers of the channels are sent to an image processing module so that the image processing module can process images.
The image processing module 30 is connected to the photodetection module 20, and is configured to receive the area images and the image numbers of the channels, and output a defect detection result.
It should be understood that, after receiving the area image and the image number of each channel, the image processing module can analyze and process the area image, and then output a defect detection result.
According to the scheme, the area images of the Micro LED display to be detected are respectively acquired through the industrial cameras of the photoelectric detection module, and are sent to the control circuit board; the control circuit board is used for synchronously sending the area images to the image processing module; the image processing module is used for receiving the regional image, outputting a defect detection result, realizing pixel-level detection of the Micro LED display, realizing high detection precision of the Micro LED display, realizing full-width imaging of the Micro LED display, having a large view field and high detection efficiency, and satisfying the detection requirement of industrial production, wherein the detection data has real-time property.
Referring to fig. 2, fig. 2 is a schematic diagram of the Micro LED display defect detecting device of the present invention.
As shown in fig. 2, the photodetection module includes:
a carrier 001, a control power supply 002 and an industrial camera;
the carrier is used for bearing the Micro LED display to be detected;
the control power supply is used for lighting the Micro LED display to be detected, and the voltage of the control power supply is matched with the reference voltage of the Micro LED display to be detected;
the industrial camera is used for shooting the area image of the Micro LED display to be detected.
The carrier is used for bearing the Micro LED display to be detected, the carrier can bear the Micro LED display in a vacuum adsorption mode, and the Micro LED sample clamped by the vacuum adsorption mode can reduce external vibration displacement interference; the voltage of the control power supply is generally constant, the Micro LED display to be detected can be lightened, the general lightening time cannot be overlong, and the temperature drift effect is avoided; the voltage of the control power supply is matched with the reference voltage of the Micro LED display to be detected, namely, the Micro LED displays with different parameter types are lighted corresponding to the voltages of different control power supplies.
It is understood that the circuit wire 003 is used for connecting the control power source and the carrier; the control power supply is connected with the carrier through the circuit conducting wire, and the industrial camera is used for shooting area images corresponding to areas pre-divided by the Micro LED display to be detected.
Further, the Micro LED display defect detecting device further includes: an alarm module;
the alarm module is connected with the control power supply 002 and used for giving an alarm when the power supply voltage of the control power supply is subjected to temperature drift.
It should be noted that the alarm module may monitor the power voltage of the control power supply, and alarm when the power voltage has a temperature drift phenomenon, so as to ensure the power stability of the control power supply, and of course, the alarm module may also be integrated in the control circuit board, which is not limited in this embodiment.
Further, the industrial camera comprises an imaging control structure and a double telecentric lens, the imaging control structure and the double telecentric lens are combined into the industrial camera, and the number of the industrial camera is matched with the divided area of the Micro LED display to be detected.
It should be understood that industry camera includes formation of image control structure and two telecentric lens, formation of image control structure with two telecentric lens components are synthetic industry camera, the quantity of industry camera is corresponding to the detection area who waits to detect Micro LED display and divide in advance, through the non-projection effect and the low distortion characteristic of two telecentric lens, more are favorable to the follow-up image processing module carries out the image concatenation, and based on the non-projection effect of two telecentric lens, the fixed spatial distribution of industry camera combines, can reduce the process of follow-up processing image concatenation behind the label, and then improves the efficiency of display on-line measuring.
Further, the imaging control structure is a COMS.
In concrete implementation, taking 6 industrial cameras as an example, after the first industrial COMS004 and the matched double telecentric lens 005, the second industrial COMS006 and the matched double telecentric lens 007, the third industrial COMS008 and the matched double telecentric lens 009, the fourth industrial COMS010 and the matched double telecentric lens 011, the fifth industrial COMS012 and the matched double telecentric lens 013, and the sixth industrial COMS014 and the matched double telecentric lens 015 are spatially arranged, the area image is synchronously sent to the image processing module through the control circuit board.
Further, the image processing module is further configured to send a trigger signal to the control circuit board, so that the control circuit board triggers the synchronous imaging instruction again.
It should be noted that, after the image processing module sends the trigger signal to the control circuit board, the control circuit board can be triggered synchronously again, even if the control circuit board triggers the synchronous imaging instruction again.
Further, the control circuit board is further configured to send a pulse exposure instruction to the photodetection module;
the photoelectric detection module is further used for synchronously shooting the area image of the Micro LED display to be detected according to the pulse exposure instruction.
It should be noted that the pulse exposure instruction is an instruction for performing synchronous pulse exposure control on the photoelectric detection module, the sending mode of the pulse exposure instruction may be wired or wireless, and the photoelectric detection module may control shooting exposure time according to the pulse exposure instruction, so as to synchronously shoot the area image of the Micro LED display to be detected.
Further, the control circuit board is an FPGA control circuit board; the image processing module is a computer.
It can be understood that, as shown in fig. 2, the FPGA control circuit board 016 is used for synchronous pulse exposure control, and images formed by the six cameras synchronously are transmitted to the computer 018 via the data wire 017 to be subjected to image stitching processing, so as to form a Micro LED global image; based on the non-projection effect of the double telecentric lens, the fixed spatial distribution of the industrial camera is combined, the algorithm processing process of image splicing in the subsequent processing can be reduced after labeling, and the online detection can be carried out in real time by adopting a multi-channel and ultrahigh-resolution detection mode in cooperation with the embodiment.
It should be understood that the FPGA controls six industrial cameras to synchronously image, and Micro LED imaging images of six channels are acquired.
In the specific implementation, the FPGA controls six industrial COMS cameras to synchronously image, exposure instructions of the six industrial COMS cameras are received, time difference is calculated, and then the written instruction program carries out time sequence delay on the front five cameras respectively on the basis of the exposure instruction of the last camera, so that the effect of synchronous shooting is achieved; the method is characterized in that the computer receives the initial names of the images of the six cameras, the time for taking the images is displayed in the middle, and the comparison of the time of the six images can be used for checking whether the images are taken synchronously.
Further, the detection environment of the Micro LED display to be detected is a darkroom with dust density smaller than preset density.
It should be noted that, the Micro LED display to be detected is detected in a darkroom, so that the influence of stray light can be reduced, and the detection precision can be improved, the preset density is a preset dust density, and in a room where the dust density is smaller than the preset density, an error caused by the coverage of dust particles on the Micro LED elements of the Micro LED display to be detected can be avoided, so that the detection precision is further improved.
Further, the cameras are arranged according to a preset camera arrangement rule;
the area image comprises a sample area imaging image and an edge image;
the image processing module includes: the cutting module and the detection module;
the cutting module is used for receiving the area images of all the channels and outputting the sample area imaging images of all the channels;
the detection module is connected with the cutting module and used for receiving the sample area imaging images of all channels and outputting a defect detection result.
It can be understood that the region images can be cut and spliced by the cutting module, so as to generate the sample region imaging images of each channel, and the splicing is generally performed according to the image numbers.
In a specific implementation, as shown in fig. 3, fig. 3 is a diagram illustrating a camera arrangement of the Micro LED display defect detecting device of the present invention; referring to fig. 3, after six industrial COMS cameras and lenses are arranged in six area imaging spaces corresponding to Micro LED samples, imaging detection is performed on the Micro LEDs which are stably lighted; the cameras are arranged according to a preset camera arrangement rule, so that the adjustment of the industrial camera can be matched with the pre-divided area of the Micro LED display to be detected, and the condition of incomplete coverage is avoided.
It will be appreciated that the area image includes an imaging area and an edge area, and that the imaging area near the center of the camera may be selected from the area image, the edge area of the area image may be discarded, and then the image processing module splices the processed images, the industrial camera can be a ten million pixel camera, of course, a camera with other pixel specifications, therefore, the Micro LED display is shot and imaged, the imaging area in a general shot image has certain spatial imaging superposition, and the processing such as edge elimination, moire elimination, distortion correction and the like can be carried out at the moment, after the processing, image processing such as image recognition, splicing, smoothing, fusion and the like can be carried out, therefore, a view field global image is obtained, full-width imaging of the whole Micro LED display to be detected is realized at the same time sequence, and the requirement for realizability in industrial production is met.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a Micro LED display defect detection device which characterized in that, Micro LED display defect detection device includes:
the control circuit board is used for sending a synchronous imaging instruction to the photoelectric detection module;
the photoelectric detection module is connected with the control circuit board and used for responding to the synchronous imaging instruction, respectively acquiring the area image and the corresponding image number of the Micro LED display to be detected through a plurality of industrial cameras and sending the area image and the image number of each channel to the image processing module;
the image processing module is connected with the photoelectric detection module and used for receiving the area images and the image numbers of the channels and outputting a defect detection result.
2. A Micro LED display defect detection device as claimed in claim 1, wherein the display defect detection device further comprises:
a carrier, a control power supply;
the carrier is used for carrying and vacuum-absorbing the Micro LED display to be detected;
the control power supply is used for lighting the Micro LED display to be detected, and the voltage of the control power supply is matched with the reference voltage of the Micro LED display to be detected.
3. The Micro LED display defect detection device of claim 1, wherein the industrial camera comprises an imaging control structure and a double telecentric lens, the imaging control structure and the double telecentric lens are combined into the industrial camera, and the number of the industrial camera is matched with the divided area of the Micro LED display to be detected.
4. The Micro LED display defect detection device of claim 1, wherein the image processing module is further configured to send a trigger signal to the control circuit board to cause the control circuit board to re-trigger the synchronous imaging command.
5. The Micro LED display defect detection device of claim 1, wherein the control circuit board is further configured to send a pulse exposure command to the photodetection module;
the photoelectric detection module is further used for synchronously shooting the area image of the Micro LED display to be detected according to the pulse exposure instruction.
6. A Micro LED display defect detection device according to any of claims 1 to 5, wherein the control circuit board is an FPGA control circuit board.
7. A Micro LED display defect detecting device as set forth in any of claims 1-5, wherein the detecting environment of the Micro LED display to be detected is a darkroom with dust density less than a preset density.
8. A Micro LED display defect detection device according to any of claims 1 to 5, wherein the plurality of cameras are arranged according to a preset camera arrangement rule.
9. A Micro LED display defect detection device according to any of claims 1 to 5, wherein the area image comprises a sample area imaging image and an edge image;
the image processing module includes: the cutting module and the detection module;
the cutting module is used for receiving the area images of all the channels and outputting the sample area imaging images of all the channels;
the detection module is connected with the cutting module and used for receiving the sample area imaging images of all channels and outputting a defect detection result.
10. A Micro LED display defect detection device as claimed in any of claims 2-5, further comprising: an alarm module;
the alarm module is connected with the control power supply and used for giving an alarm when the power supply voltage of the control power supply is subjected to temperature drift.
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| CN202023208215.2U CN212459460U (en) | 2020-12-28 | 2020-12-28 | Micro LED display defect detection device |
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| CN202023208215.2U CN212459460U (en) | 2020-12-28 | 2020-12-28 | Micro LED display defect detection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115452843A (en) * | 2022-11-03 | 2022-12-09 | 惠州威尔高电子有限公司 | Defect detection system and detection method for MiniLED circuit board |
| CN115494068A (en) * | 2022-09-19 | 2022-12-20 | 卡奥斯工业智能研究院(青岛)有限公司 | Product detection method, device, detection equipment and storage medium |
| CN116246562A (en) * | 2023-05-09 | 2023-06-09 | 季华实验室 | Non-contact detection system and method for display panel |
| WO2023108545A1 (en) * | 2021-12-16 | 2023-06-22 | Jade Bird Display (Shanghai) | Method for constructing defect detection model of micro led array panel, apparatures for dectectig pixel defect and devices |
| WO2023108549A1 (en) * | 2021-12-16 | 2023-06-22 | Jade Bird Display (Shanghai) Company | Inspecting tool for inspecting micro led array panel |
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2020
- 2020-12-28 CN CN202023208215.2U patent/CN212459460U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023108545A1 (en) * | 2021-12-16 | 2023-06-22 | Jade Bird Display (Shanghai) | Method for constructing defect detection model of micro led array panel, apparatures for dectectig pixel defect and devices |
| WO2023108549A1 (en) * | 2021-12-16 | 2023-06-22 | Jade Bird Display (Shanghai) Company | Inspecting tool for inspecting micro led array panel |
| CN115494068A (en) * | 2022-09-19 | 2022-12-20 | 卡奥斯工业智能研究院(青岛)有限公司 | Product detection method, device, detection equipment and storage medium |
| CN115452843A (en) * | 2022-11-03 | 2022-12-09 | 惠州威尔高电子有限公司 | Defect detection system and detection method for MiniLED circuit board |
| CN115452843B (en) * | 2022-11-03 | 2023-03-14 | 惠州威尔高电子有限公司 | MiniLED circuit board defect detection system and detection method |
| CN116246562A (en) * | 2023-05-09 | 2023-06-09 | 季华实验室 | Non-contact detection system and method for display panel |
| CN116246562B (en) * | 2023-05-09 | 2023-08-15 | 季华实验室 | Non-contact detection system and method for display panel |
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