CN216978883U - Defect detection device for large-format miniLED panel - Google Patents
Defect detection device for large-format miniLED panel Download PDFInfo
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- CN216978883U CN216978883U CN202121036251.7U CN202121036251U CN216978883U CN 216978883 U CN216978883 U CN 216978883U CN 202121036251 U CN202121036251 U CN 202121036251U CN 216978883 U CN216978883 U CN 216978883U
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Abstract
The utility model relates to a defect detection device for a large-format miniLED panel, which comprises a carrying platform for positioning the miniLED panel; the motion module is used for driving the displacement of the carrying platform, the carrying platform is fixed on the motion module, and the motion module is in transmission connection with the carrying platform; the scanning and collecting module is arranged above the carrying platform and is used for scanning and photographing the miniLED panel; and the light rays of the mirror image light source irradiate the scanning surface of the miniLED panel. According to the utility model, the LED lamp beads of the miniLED panel with a large width are scanned, so that the defect detection efficiency can be effectively improved, and the defect detection time is reduced.
Description
Technical Field
The utility model relates to the technical field of miniLED panel defect detection, in particular to a defect detection device for a large-format miniLED panel.
Background
Currently, the Mini LED is one of the important technical trends in the display industry, and as a display technology for transition from the LED to the Micro LED, the Mini LED has the advantages of being thin-film, miniaturized, arrayed, high in brightness and low in cost, and will be gradually introduced into industrial application. In recent years, various technical routes of the Mini LED are rapidly advanced, the small-distance market continuously explodes, the Mini LED starts to enter the production yuan year, and the Mini LED is gradually introduced into industrial application and starts to accelerate infiltration. The introduction of Mini LEDs into areas including automotive panels, cell phones, and large-size panels is estimated to grow to 8070 million downstream devices carrying their technologies in 2023, driving the market for Mini LEDs to $ 6.4 million. With the increasing investment on Mini LEDs of various large panel manufacturers, the requirements of matched detection equipment are synchronously increased, the productivity is improved and the yield is stabilized for Mini LED manufacturers in the industry, and the development of visual detection equipment is necessary.
Because the prior Mini LED production lines in China are in the technical discussion and research and development stages at present, matched detection equipment manufacturers are not moved in a large scale, and the applied Mini LED detection equipment part is imported equipment.
The size of a large-format Mini LED panel on the market is generally known to be not less than 8 inches (diagonal length) and can reach 20 inches at most, which means that the total image acquisition format of a corresponding visual detection system is relatively large; the size of the Mini LED lamp bead used as a luminous body is about 150um 90um, and if the defect of the lamp bead needs to be clearly displayed, the support of a micro-vision optical system is needed, namely the optical resolution cannot be lower than 5 um/pixel. However, imaging systems with higher optical resolution often have a smaller field of view, which is very time consuming for image acquisition of large format Mini LED samples.
SUMMERY OF THE UTILITY MODEL
The utility model provides a defect detection device and method for a large-format miniLED panel to solve the technical problems that the defect detection of the large-format miniLED panel is long in time consumption and low in detection efficiency.
The technical scheme for solving the technical problems is as follows:
the present invention provides a defect detection apparatus for a large-format miniLED panel, which includes:
the carrying platform is used for positioning the miniLED panel;
the motion module is used for driving the carrying platform to move, the carrying platform is fixed on the motion module, and the motion module is in transmission connection with the carrying platform;
the scanning and collecting module is arranged above the carrying platform and is used for scanning and photographing the miniLED panel;
and the light of the mirror image light source irradiates the scanning surface of the miniLED panel.
The utility model has the beneficial effects that: the utility model is provided with the movement module, can drive the carrying platform to move, and can move relative to the scanning module, so that the miniLED panel can be subjected to defect scanning, the defect detection time of the miniLED panel is effectively shortened, and the detection efficiency is effectively improved.
On the basis of the technical scheme, the utility model can be further improved as follows.
Furthermore, the motion module includes that Y axle is transplanted and X axle is transplanted, X axle transplant set up with on the Y axle is transplanted, Y axle transplant with X axle transplant transmission is connected, cargo platform set up in on the X axle is transplanted, X axle transplant with cargo platform transmission is connected.
The beneficial effect of adopting the further scheme is that: the Y-axis transplanting can drive the X-axis transplanting to move along the Y-axis direction, so that the carrying platform is driven to move along the Y-axis and the X-axis, and defect scanning is facilitated.
Further, the scanning acquisition module includes the mounting bracket and with the camera that miniLED panel upper surface perpendicular set up, the camera is fixed in on the mounting bracket, the scanning end orientation of camera the cargo platform, the mirror image light source set up in the camera side.
The beneficial effect of adopting the further scheme is that: the camera is fixed and can be guaranteed the stability of camera scanning in-process on the mounting bracket, and scanning efficiency is high.
Further, the cameras are arranged at intervals, and the distance between every two adjacent cameras is 57.67 mm.
The beneficial effect of adopting the above further scheme is: the efficiency of defect detection scanning can be promoted by adopting a plurality of cameras.
Further, the mirror image light source includes that the symmetry sets up in the first light source and the second light source of camera side, first light source with the second light source all with miniLED panel contained angle sets up.
The beneficial effect of adopting the further scheme is that: the first light source and the second light source which are arranged by the aid of the LED lamp bead scanning device can provide stable illumination, and the LED lamp beads can be conveniently scanned by the camera.
Further, the included angles between the first light source and the miniLED panel and the included angles between the second light source and the miniLED panel are both 60 degrees.
The beneficial effect of adopting the further scheme is that: the first light source and the second light source which are arranged in the mode of being adopted can guarantee that sufficient illumination can be carried out on each LED lamp bead, and the defect detection efficiency is high.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of defect detection according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a loading platform; 2. a motion module; 21. transplanting along the Y axis; 22. transplanting along an X axis; 3. a scanning acquisition module; 31. a mounting frame; 32. a camera; 4. a mirror image light source; 41. a first light source; 42. a second light source.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
Examples
As shown in fig. 1, the present invention provides a defect detection apparatus for a large-format miniLED panel, comprising: an object carrying platform 1 for positioning a miniLED panel; the moving module 2 is used for driving the carrying platform 1 to move, the carrying platform 1 is fixed on the moving module 2, and the moving module 2 is in transmission connection with the carrying platform 1; the scanning and collecting module 3 is arranged above the loading platform 1 and is used for scanning and shooting the miniLED panel; and a mirror image light source 4, wherein light rays of the mirror image light source 4 irradiate the scanning surface of the miniLED panel.
Preferably, the movement module 2 comprises a Y-axis transplanting module 21 and an X-axis transplanting module 22, the X-axis transplanting module 22 is arranged on the Y-axis transplanting module 21, the Y-axis transplanting module 21 is in transmission connection with the X-axis transplanting module 22, the carrying platform 1 is arranged on the X-axis transplanting module 22, and the X-axis transplanting module 22 is in transmission connection with the carrying platform 1.
It should be noted that the Y-axis transplanting 21 and the X-axis transplanting 22 are both provided with linear motors, the Y-axis transplanting 21 drives the carrying platform 1 to move along the Y axis, so that the scanning and collecting module can scan odd columns and even columns, the X-axis transplanting 22 drives the carrying platform 1 to move in a direction perpendicular to the Y-axis transplanting 21 module, when scanning and photographing are performed in defect detection, the odd columns are switched to even columns for scanning and photographing, wherein the speed range of the Y-axis transplanting 21 driving the carrying platform 1 to move along the Y axis is 100-150 mm/s, and after the X-axis transplanting 22 drives the carrying platform 1 to move 57.67mm along the X axis, the Y-axis transplanting 21 drives the carrying platform 1 to move along the opposite direction of the Y axis, so as to scan and photograph even columns.
Preferably, the scanning and collecting module 3 includes a mounting frame 31 and a camera 32 disposed perpendicular to the upper surface of the miniLED panel, the camera 32 is fixed on the mounting frame 31, the scanning end of the camera 32 faces the object stage 1, and the mirror image light source 4 is disposed on the side of the camera 32.
Preferably, the cameras 32 are spaced apart, and the spacing between adjacent cameras 32 is 57.67 mm.
In this embodiment, three cameras 32 are linearly arranged, and the three cameras 32 are arranged at intervals in the X-axis direction.
Preferably, the mirror image light source 4 includes a first light source 41 and a second light source 42 symmetrically disposed on the side of the camera 32, and both the first light source 41 and the second light source 42 are disposed at an angle to the miniLED panel.
It should be noted that the first light source 41 is provided with three first light lamps corresponding to the three cameras 32, the second light source 42 is provided with three second light lamps corresponding to the three cameras 32, and one first light lamp and one second light lamp are symmetrically provided on opposite sides of each camera 32, it is easy to understand that the first light lamp and the second light lamp are respectively provided on two sides of the camera 32 in the Y-axis direction.
Preferably, the angles between the first light source 41 and the second light source 42 and the miniLED panel are both 60 °, it is understood that the miniLED panel is horizontally disposed, the angle between the illumination light generated by the first light source 41 and the second light source 42 and the vertical direction is 30 °, the center distance between the first off light of the first light source 41 and the second light of the second light source 42 is 180mm, the height between the center distance between the first off light and the second light of the miniLED panel is 200mm, and the total illumination light on the surface of the miniLED panel is 1000 lux.
The system further comprises an industrial personal computer control system, wherein the industrial personal computer control system controls the motion point position and the motion speed of the Y-axis transplanting and the X-axis transplanting, triggers the debugging and is connected with a camera to receive the scanned and photographed images, judges the defects of all lamp beads in the images through a depth learning algorithm, and obtains the defect detection result.
As shown in fig. 2, a defect detection method for a large-format miniLED panel by using the defect detection apparatus is provided, which includes the following steps:
s1, providing a miniLED panel to be detected, placing the miniLED panel on the carrying platform, dividing the detection surface of the miniLED panel into a plurality of odd columns and even columns which are sequentially arranged along the determined direction, wherein the odd columns and the even columns are parallel to the determined direction;
s2: the motion module drives the loading platform to move at a constant speed along the same direction determined in the step S2, the scanning acquisition module scans and photographs odd-numbered rows, and the mirror image light source irradiates on the miniLED panel during scanning and photographing;
s3: in the direction opposite to the motion path in the step S2, the mirror image light source irradiates on the miniLED panel, the motion module drives the carrying platform to move at a constant speed, the scanning and collecting module scans and photographs the even number rows, and the mirror image light source irradiates on the miniLED panel during scanning and photographing;
s4: repeating the step S2 and the step S3 until the scan acquisition module completely scans and photographs the multiple columns of odd-numbered columns and even-numbered columns, in this embodiment, the number of times of repeating the step S2 and the step S3 is a natural number, that is, the number of cameras is three, and when the odd-numbered columns and the even-numbered columns are also set to three columns, only one reciprocating motion of the carrying platform is needed to be completed, so that the image acquisition of the miniLED panel can be completed, and certainly, when the number of the cameras is different from the number of the odd-numbered columns and the even-numbered columns, the natural number of times of reciprocating motion can be repeated, the final purpose is to completely scan and photograph the miniLED panel, and certainly, when only one thousand-blessing motion is performed, the scanning time can be greatly reduced, and the whole defect detection efficiency is improved;
s5: taking pictures according to the scanning of the step S2, the step S3 and the step S4 to generate a complete image of the lamp bead of the miniLED panel;
s6: and judging the defects of each LED lamp bead in the complete image to finish the defect detection.
In the step S3 and the step S4, the speed of the miniLED panel moving at a constant speed is 120mm/S, it should be noted that the line frequency of the camera is set to 35000, the trigger mode of scanning and photographing is frame trigger, the number of frames is set to 4, the height of a single-frame image is 29000, and under the setting, the length of the view field which can be covered by the camera trigger once is 410mm, which can satisfy the length of the long side of the 32-inch miniLED panel; the line frequency of the camera is equal to the speed of uniform motion multiplied by the magnification/CCD size.
In steps S3 and S4, the resolution of the camera of the scan acquisition module is 16k, the size of a single pixel of the camera is 3.52um × 3.52um, the lens of the camera is a high resolution lens with × 1.0 magnification, and the resolution of the high resolution lens is equal to or greater than 160 lp/mm.
In steps S3 and S4, the total illuminance of the mirror image light sources is 1000 lux.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A defect detecting device for a large-format miniLED panel is characterized by comprising:
an object stage (1) for positioning the miniLED panel;
the moving module (2) is used for driving the carrying platform (1) to move, the carrying platform (1) is fixed on the moving module (2), and the moving module (2) is in transmission connection with the carrying platform (1);
the scanning and collecting module (3) is arranged above the carrying platform (1) and is used for scanning and photographing the miniLED panel;
and the light of the mirror image light source (4) irradiates the scanning surface of the miniLED panel.
2. The defect detecting device according to claim 1, wherein the moving module (2) comprises a Y-axis transplanting device (21) and an X-axis transplanting device (22), the X-axis transplanting device (22) is arranged on the Y-axis transplanting device (21), the Y-axis transplanting device (21) is in transmission connection with the X-axis transplanting device (22), the carrying platform (1) is arranged on the X-axis transplanting device (22), and the X-axis transplanting device (22) is in transmission connection with the carrying platform (1).
3. The defect detecting device according to claim 1, wherein the scanning and collecting module (3) comprises a mounting frame (31) and a camera (32) arranged perpendicular to the upper surface of the miniLED panel, the camera (32) is fixed on the mounting frame (31), the scanning end of the camera (32) faces the carrying platform (1), and the mirror image light source (4) is arranged on the side of the camera (32).
4. The defect detecting device according to claim 3, wherein the cameras (32) are arranged at intervals, and the distance between the adjacent cameras (32) is 57.67 mm.
5. A defect detecting apparatus according to claim 3, wherein the mirror image light source (4) comprises a first light source (41) and a second light source (42) symmetrically arranged at the side of the camera (32), and the first light source (41) and the second light source (42) are arranged at an angle to the miniLED panel.
6. A defect detecting apparatus according to claim 5, characterized in that the first light source (41) and the second light source (42) are both at an angle of 60 ° to the miniLED panel.
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| CN202121036251.7U CN216978883U (en) | 2021-05-14 | 2021-05-14 | Defect detection device for large-format miniLED panel |
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| CN202121036251.7U CN216978883U (en) | 2021-05-14 | 2021-05-14 | Defect detection device for large-format miniLED panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113390896A (en) * | 2021-05-14 | 2021-09-14 | 北京兆维智能装备有限公司 | Defect detection device and method for large-format miniLED panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113390896A (en) * | 2021-05-14 | 2021-09-14 | 北京兆维智能装备有限公司 | Defect detection device and method for large-format miniLED panel |
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