CN115170577B - Method and system for detecting defects of edge area of display panel - Google Patents
Method and system for detecting defects of edge area of display panel Download PDFInfo
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- CN115170577B CN115170577B CN202211100777.6A CN202211100777A CN115170577B CN 115170577 B CN115170577 B CN 115170577B CN 202211100777 A CN202211100777 A CN 202211100777A CN 115170577 B CN115170577 B CN 115170577B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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- G06T7/10—Segmentation; Edge detection
- G06T7/13—Edge detection
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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- G06T7/50—Depth or shape recovery
- G06T7/514—Depth or shape recovery from specularities
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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- G06T7/70—Determining position or orientation of objects or cameras
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Abstract
The invention discloses a method and a system for detecting defects of an edge area of a display panel, and belongs to the field of display panel testing. The detection camera is used for capturing images at one time and acquiring images of the upper surface, the lower surface and the side surface of the display panel at the same time, and analyzing the images through the processing unit to acquire defect information of the edge area of the display panel. The image of once getting for instance and acquireing display panel upper surface, lower surface and side of detection camera specifically includes: the detection camera acquires an image of the upper surface of the edge area through the first reflecting mirror. The detection camera acquires an image of the lower surface of the marginal area through the second reflecting mirror. And the detection camera acquires an image of the side surface through the third reflector group. The invention provides a method for detecting the edge area defect of a display panel, which can realize the edge area defect detection by one-time image capture of a single detection camera without multiple image capture of multiple cameras, thereby improving the detection efficiency.
Description
Technical Field
The invention belongs to the field of display panel testing, and particularly relates to a method and a system for detecting defects of an edge area of a display panel.
Background
The display panel is a major component of the display device, and the quality of the display panel determines the quality of the display device. In the production process of the display panel, the edge region defect detection is often required to be carried out on the display panel, the display panel is sequentially photographed and detected through an industrial vision detection camera, so that the display panel with the edge region defect is picked out, and the vision detection is to use the camera to replace human eyes for measurement and judgment. The visual inspection means that a camera converts a shot target into an image signal, transmits the image signal to a special image processing system, and converts the image signal into a digital signal according to information such as pixel distribution, brightness, color and the like, so as to finally determine whether the edge of the display panel has defects.
In the camera technology, the detection method of the edge region defect of the display panel is to photograph the top edge, the bottom edge and the side surface of the display panel respectively through three independent cameras, so that the edge region defect detection is realized.
However, the above detection requires three cameras and three image analysis processes, resulting in low detection efficiency.
Disclosure of Invention
The invention provides a method and a system for detecting the defects of the edge area of a display panel, aiming at acquiring images of the upper surface, the lower surface and the side surface of the display panel simultaneously by one-time image acquisition of a single detection camera, realizing the detection of the defects of the edge area, avoiding multiple image acquisition of multiple cameras and improving the detection efficiency.
In a first aspect, the present invention provides a method for detecting defects in an edge region of a display panel, the edge region of the display panel includes an upper surface, a lower surface and a side surface which are located at the same edge,
the detection camera is axially vertical to the side face of the display panel, and is used for acquiring images at one time, acquiring images of the upper surface, the lower surface and the side face of the display panel, analyzing the images through a processing unit and acquiring defect information of the edge area of the display panel;
the detection camera once gets for instance and acquires the image of display panel upper surface, lower surface and side simultaneously, specifically includes:
the detection camera acquires an image of the upper surface of the edge area through a first reflector, and the first reflector is obliquely positioned on the upper surface of the edge area;
the detection camera acquires an image of the lower surface of the marginal area through a second reflector, and the second reflector is obliquely positioned on the lower surface of the marginal area;
the detection camera acquires the image of the side surface through a third reflector group, and the third reflector group is two reflectors which are positioned on the side surface and are mutually obliquely and parallelly arranged.
Optionally, before the inspection camera captures images at a time and acquires images of the upper surface, the lower surface and the side surface of the display panel, further comprising,
by adjusting the relative position relationship among the display panel, the first reflector, the second reflector, the third reflector group and the detection camera, the detection camera can simultaneously obtain focused images of the upper surface, the lower surface and the side surface of the edge area.
Optionally, the method further comprises:
by adjusting the relative distance between the first reflector and the second reflector and the detection camera in the horizontal direction, the detection camera can simultaneously obtain focused images of the upper surface and the lower surface of the edge region;
and adjusting the optical path and/or horizontally moving the display panel by adjusting the relative distance between two reflectors in the third reflector group, so that the detection camera can simultaneously obtain the focused images of the side surfaces.
Optionally, when the display panel is a standard display panel, the optical axis of the detection camera is located at a half-height position of the thickness of the display panel, and the first reflector and the second reflector are symmetrical with respect to the optical axis of the detection camera.
Optionally, when the thickness of the display panel changes relative to a standard display panel, compensating for focusing by horizontally moving the first mirror so as to adjust a relative distance between the first mirror and the detection camera.
Optionally, the optical system further comprises an integrated motor, the integrated motor is connected with at least the first reflecting mirror, the second reflecting mirror, the third reflecting mirror group and the detection camera, and the integrated motor controls the connecting component to move, so that focusing adjustment is performed.
Optionally, the integrated motor includes a plurality of telescopic motors, and an output shaft of each telescopic motor is in transmission connection with the corresponding first reflecting mirror, the corresponding second reflecting mirror, the corresponding third reflecting mirror group, and the corresponding detection camera.
Optionally, the integrated motor further comprises a controller, and the controller is electrically connected with the integrated motor.
Optionally, a test station is also included,
the first reflector, the second reflector, the third reflector and the detection camera are movably arranged on the test bench, so that the positions of the first reflector, the second reflector, the third reflector and the detection camera on the test bench are adjusted.
In a second aspect, the present invention further provides a system for detecting defects in an edge region of a display panel, where the edge region of the display panel includes an upper surface, a lower surface and a side surface located at the same edge, and the system includes:
the detection module is used for detecting that the axial direction of a camera lens is vertical to the side face of the display panel, and the detection camera acquires images of the upper surface, the lower surface and the side face of the display panel at the same time by one-time image acquisition;
the processing unit is used for analyzing the image and acquiring the defect information of the edge area of the display panel;
the detection camera is once got for instance and is acquireed simultaneously the image of display panel upper surface, lower surface and side specifically includes:
the detection camera acquires an image of the upper surface of the edge area through a first reflector, and the first reflector is obliquely positioned on the upper surface of the edge area;
the detection camera acquires an image of the lower surface of the marginal area through a second reflector, and the second reflector is obliquely positioned on the lower surface of the marginal area;
the detection camera acquires the image of the side surface through a third reflector group, and the third reflector group is two reflectors which are positioned on the side surface and are mutually obliquely and parallelly arranged.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
for the method for detecting the defect of the edge area of the display panel provided by this embodiment, when detecting the defect of the edge area of the display panel, the field of view of the detection camera can be divided into three parts according to the principle of image capture by the reflectors, each part respectively corresponds to the upper surface of the edge area (obtained after reflection by the first reflector), the lower surface of the edge area (obtained after reflection by the second reflector) and the side surface (obtained after reflection by the two reflectors), i.e. the detection camera obtains the image of the upper surface of the edge area through the first reflector, the detection camera obtains the image of the lower surface of the edge area through the second reflector, the detection camera obtains the image of the side surface through the third reflector group, the third reflectors are two reflectors which are positioned on the side surface and are obliquely and parallelly placed, and further the detection camera can simultaneously obtain the images of the upper surface, the lower surface and the side surface by one-time image capture without multiple image capture. And finally, analyzing the image through a processing unit to acquire defect information of the edge area of the display panel.
That is to say, according to the method for detecting the edge area defect of the display panel provided by the embodiment of the invention, the image of the upper surface, the lower surface and the side surface of the display panel can be acquired by a single detection camera at one time, so that the edge area defect detection is realized, multiple image acquisition by multiple cameras is not required, and the detection efficiency is improved.
Drawings
FIG. 1 is a flowchart illustrating a method for detecting defects in an edge region of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an apparatus for detecting defects in an edge area of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third mirror group according to an embodiment of the invention.
The symbols in the drawings represent the following meanings:
1. detecting a camera; 2. a first reflecting mirror; 3. a second reflector; 4. a third reflector group; 41. a mirror; 5. a test bench; 100. a display panel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a flowchart of a method for detecting defects in an edge area of a display panel according to an embodiment of the present invention, as shown in fig. 1, including:
s1, the inspection camera 1 captures images of the upper surface, the lower surface and the side of the display panel 100 at the same time.
And S2, analyzing the image through the processing unit to acquire defect information of the edge area of the display panel 100.
The step S1 specifically includes:
s11, the detection camera 1 obtains an image of the upper surface of the edge area through the first reflecting mirror 2, and the first reflecting mirror 2 is obliquely positioned on the upper surface of the edge area.
S12, the inspection camera 1 obtains an image of the lower surface of the fringe area by the second reflecting mirror 3, and the second reflecting mirror 3 is obliquely positioned on the lower surface of the fringe area (see fig. 2).
S13, the detecting camera 1 obtains the image of the side surface through the third mirror group 4, where the third mirror group 4 is two mirrors 41 (see fig. 3) that are located at the side surface and are disposed in parallel and inclined to each other.
The edge area of the display panel includes an upper surface, a lower surface and a side surface located at the same edge, and the lens axis of the detection camera 1 is perpendicular to the side surface of the display panel 100.
For the method for detecting the defect of the edge area of the display panel provided in this embodiment, when detecting the defect of the edge area of the display panel 100, the field of view of the detection camera 1 may be divided into three parts by using a reflector image capturing principle, each part respectively corresponds to the upper surface (obtained after being reflected by the first reflector 2), the lower surface (obtained after being reflected by the second reflector 3) and the side surface (obtained after being reflected by the two reflectors 41) of the edge area of the detection display panel 100, that is, the detection camera 1 obtains the image of the upper surface of the edge area by using the first reflector 2, the detection camera 1 obtains the image of the lower surface of the edge area by using the second reflector 3, the detection camera 1 obtains the image of the side surface by using the third reflector 4, the third reflector 4 is two reflectors 41 which are located on the side surface and are obliquely and parallel to each other, and further can obtain the images of the upper surface, the lower surface and the side surface of the display panel 100 by using the detection camera 1 once image capturing without using more lens groups. And finally, analyzing the image through a processing unit to acquire defect information of the edge area of the display panel.
That is to say, according to the method for detecting the edge area defect of the display panel provided by the embodiment of the invention, the single detection camera 1 can be used for image capture once and simultaneously acquiring the images of the upper surface, the lower surface and the side surface of the display panel 100, so that the edge area defect detection is realized, multiple image capture by multiple cameras is not required, and the detection efficiency is improved.
The defects in the edge area of the display surface can be cracks, crazes, scratches, cracks, and creases and lacerations after coating black adhesive tapes.
In the present embodiment, before the inspection camera 1 captures images of the upper surface, the lower surface and the side surfaces of the display panel 100 at the same time, the method further includes,
by adjusting the relative position relationship among the display panel 100, the first reflector 2, the second reflector 3, the third reflector group 4 and the detection camera 1, the detection camera 1 can simultaneously obtain focused images of the upper surface, the lower surface and the side surface of the edge area.
In the above embodiment, by adjusting the relative position relationship among the display panel 100, the first reflector 2, the second reflector 3, the third reflector group 4, and the detection camera 1, the positions of the display panel 100, the first reflector 2, the second reflector 3, the third reflector group 4, and the detection camera 1 can be adjusted, so that the detection camera 1 can simultaneously obtain the focused images of the upper surface, the lower surface, and the side surface of the edge region.
It should be noted that, by adjusting the relative position relationship among the display panel 100, the first reflecting mirror 2, the second reflecting mirror 3, the third reflecting mirror group 4, and the detection camera 1, the detection camera 1 can focus on three areas of the display panel 100, and can also adapt to the focusing of the display panels 100 with different thicknesses, thereby increasing the application range of the present invention.
That is, when the display panel 100 with the same thickness is inspected, the adjustment of the relative position relationship among the display panel 100, the first reflecting mirror 2, the second reflecting mirror 3, the third reflecting mirror group 4 and the inspection camera 1 is completed, so that the inspection camera 1 does not need to be adjusted again after focusing. When the display panel 100 with different thickness is detected, the relative position relationship among the display panel 100, the first reflector 2, the second reflector 3, the third reflector group 4, and the detection camera 1 needs to be adjusted again, so that the detection camera 1 can obtain the focused images of the upper surface, the lower surface, and the side surface of the edge region of the new display panel at the same time (refocus).
Specifically, for the adjustment of the first reflecting mirror 2 and the second reflecting mirror 3, the relative distance between the first reflecting mirror 2 and the second reflecting mirror 3 and the detection camera 1 in the horizontal direction can be adjusted, so that the detection camera 1 can simultaneously obtain the focused images of the upper surface and the lower surface of the edge area.
For the adjustment of the third mirror group 4, the optical path can be adjusted and/or the display panel 100 can be horizontally moved by adjusting the relative distance between the two mirrors 41 in the third mirror group 4, so that the detection camera 1 can simultaneously obtain focused images of the sides.
In one implementation of the present invention, when the display panel 100 is a standard display panel 100, the optical axis of the inspection camera 1 is located at a half-height position of the thickness of the display panel 100, and the first reflector 2 and the second reflector 3 are symmetrical with respect to the optical axis of the inspection camera 1.
In the above embodiment, the first reflecting mirror 2 and the second reflecting mirror 3 are symmetrical with respect to the optical axis of the inspection camera 1, so that the optical paths to the inspection camera 1 through the first reflecting mirror 2 and the second reflecting mirror 3 are consistent, and at this time, in the focusing adjustment, it is not necessary to separately adjust the first reflecting mirror 2 and the second reflecting mirror 3, but only by adjusting the inspection camera 1.
In another implementation of the present invention, when the thickness of the display panel 100 is changed with respect to the standard display panel 100, the compensation focusing is performed by moving the first reflecting mirror 2 horizontally to adjust the relative distance between the first reflecting mirror 2 and the inspection camera 1.
In the above embodiment, when the thickness of the display panel 100 is changed relative to the standard display panel 100, the positions of the lower surface and the side surface are kept relatively unchanged (the position of the supporting surface for the display panel 100 is unchanged), and the position of the upper surface is moved up or down, and then the compensation focusing is performed by only horizontally moving the first reflecting mirror 2, so as to adjust the relative distance between the first reflecting mirror 2 and the detection camera 1, and thus the simultaneous focusing on three areas can still be realized.
In this embodiment, the device further includes an integrated motor, the integrated motor is connected to at least the first reflecting mirror 2, the second reflecting mirror 3, the third reflecting mirror group 4 and the detection camera 1, and the integrated motor controls the connected components to move, so as to perform focusing adjustment.
In the above embodiment, the integrated motor can adjust the positions of the first reflecting mirror 2, the second reflecting mirror 3, the third reflecting mirror group 4 and the detection camera 1, so as to realize focusing adjustment and avoid manual adjustment.
It is easy to understand that the linkage assembly includes a first mirror 2, a second mirror 3, a third mirror group 4 and a detection camera 1.
Exemplarily, the integrated motor comprises a plurality of telescopic motors, and an output shaft of each telescopic motor is in transmission connection with the corresponding first reflecting mirror 2, second reflecting mirror 3, third reflecting mirror group 4 and detection camera 1, so that the adjustment of the positions of the first reflecting mirror 2, second reflecting mirror 3, third reflecting mirror group 4 and detection camera 1 can be conveniently realized through the telescopic motors.
In addition, the motor controller also comprises a controller which is electrically connected with the integrated motor.
Illustratively, when a position of a component needs to be adjusted, the controller receives the designation and controls the corresponding telescopic motor to adjust the component.
In this embodiment, a test bench 5 is also included,
the first reflector 2, the second reflector 3, the third reflector 4 and the inspection camera 1 are movably arranged on the test platform 5, so as to adjust the positions of the first reflector 2, the second reflector 3, the third reflector 4 and the inspection camera 1 on the test platform 5.
It is easy to understand that the test bench 5 not only can support the first reflecting mirror 2, the second reflecting mirror 3, the third reflecting mirror group 4 and the detection camera 1, but also can conveniently adjust the relative positions of the first reflecting mirror 2, the second reflecting mirror 3, the third reflecting mirror group 4 and the detection camera 1.
Illustratively, the first mirror 2, the second mirror 3, the third mirror group 4 and the inspection camera 1 are respectively located on a support of the test stand 5. The display panel 100 is also disposed on the test stand 5, and an edge area of the display panel 100 protrudes from the test stand 5 to prevent the test stand 5 from interfering with the photographing of the inspection camera 1.
Illustratively, the first mirror 2 is tilted at an angle of 45 °, and the second mirror 3 and the two mirrors 41 are tilted at an angle of 135 °.
The invention also provides a system for detecting the defects of the edge area of the display panel, wherein the edge area of the display panel comprises an upper surface, a lower surface and a side surface which are positioned at the same edge, and the system comprises:
and the detection module is used for detecting the side surface of the lens of the camera 1, which is axially vertical to the display panel 100, and the detection camera 1 captures images at a time and simultaneously acquires images of the upper surface, the lower surface and the side surface of the display panel 100.
And the processing unit is used for analyzing the image and acquiring the defect information of the edge area of the display panel.
The detection camera 1 captures images of the upper surface, the lower surface and the side surface of the display panel 100 at the same time, and specifically includes:
the inspection camera 1 acquires an image of the upper surface of the edge area by the first reflecting mirror 2, and the first reflecting mirror 2 is obliquely positioned on the upper surface of the edge area.
The inspection camera 1 acquires an image of the lower surface of the fringe area by the second reflecting mirror 3, and the second reflecting mirror 3 is obliquely positioned on the lower surface of the fringe area.
The inspection camera 1 acquires images of the side surfaces through the third mirror group 4, and the third mirror group 4 is two mirrors 41 which are positioned on the side surfaces and are arranged in parallel and inclined to each other.
In general, the method and system for detecting the defect at the edge area of the display panel provided by the present invention can detect the edge of the display panel 100 by one-time image capture, and the development of synchronous image capture by multiple detection cameras 1 is not required. The data volume transmission processing is reduced, the number of the detection cameras is reduced by 1, the cost is saved, and the debugging difficulty is reduced. The optical machine structure space is compressed, and the integration is easy.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for detecting the defect of the edge area of a display panel, wherein the edge area of the display panel comprises an upper surface, a lower surface and a side surface which are positioned at the same edge, and is characterized in that:
the detection camera is axially vertical to the side face of the display panel, and is used for acquiring images at one time, acquiring images of the upper surface, the lower surface and the side face of the display panel, analyzing the images through a processing unit and acquiring defect information of the edge area of the display panel;
the detection camera once gets for instance and acquires the image of display panel upper surface, lower surface and side simultaneously, specifically includes:
the detection camera acquires an image of the upper surface of the edge area through a first reflector, and the first reflector is obliquely positioned on the upper surface of the edge area;
the detection camera acquires an image of the lower surface of the marginal area through a second reflector, and the second reflector is obliquely positioned on the lower surface of the marginal area;
the detection camera acquires the image of the side surface through a third reflector group, and the third reflector group comprises two reflectors which are positioned on the side surface and are mutually obliquely and parallelly arranged.
2. The method of claim 1, wherein the method comprises:
before the detection camera is used for simultaneously acquiring images of the upper surface, the lower surface and the side surface of the display panel by one-time image acquisition, the detection device also comprises a camera,
by adjusting the relative position relationship among the display panel, the first reflector, the second reflector, the third reflector group and the detection camera, the detection camera can simultaneously obtain focused images of the upper surface, the lower surface and the side surface of the edge area.
3. The method of claim 1, wherein the detecting comprises: also comprises a step of adding a new type of additive,
by adjusting the relative distance between the first reflector and the second reflector and the detection camera in the horizontal direction, the detection camera can simultaneously obtain focused images of the upper surface and the lower surface of the edge region;
and adjusting the optical path and/or horizontally moving the display panel by adjusting the relative distance between two reflectors in the third reflector group, so that the detection camera can simultaneously obtain the focused images of the side surfaces.
4. The method of claim 1, wherein the method comprises:
when the display panel is a standard display panel, the optical axis of the detection camera is located at the half-height position of the thickness of the display panel, and the first reflector and the second reflector are symmetrical relative to the optical axis of the detection camera.
5. The method of claim 1, wherein the detecting comprises:
when the thickness of the display panel is changed relative to a standard display panel, the first reflecting mirror is horizontally moved so as to adjust the relative distance between the first reflecting mirror and the detection camera to compensate focusing.
6. The method of claim 1, wherein the method comprises:
the integrated motor is at least connected with the first reflector, the second reflector, the third reflector group and the detection camera, and the connecting component is controlled to move through the integrated motor, so that focusing adjustment is performed.
7. The method of claim 6, wherein the method comprises: the integrated motor comprises a plurality of telescopic motors, and the output shaft of each telescopic motor is in transmission connection with the corresponding first reflecting mirror, the second reflecting mirror, the third reflecting mirror group and the detection camera.
8. The method of claim 6, wherein the method comprises: the integrated motor is characterized by further comprising a controller, and the controller is electrically connected with the integrated motor.
9. The method of any of claims 1-8, wherein the method comprises: the test bed is also included, and the test bed,
the first reflector, the second reflector, the third reflector and the detection camera are movably arranged on the test bench, so that the positions of the first reflector, the second reflector, the third reflector and the detection camera on the test bench are adjusted.
10. A system for detecting defects in an edge region of a display panel, the edge region of the display panel including an upper surface, a lower surface and a side surface at the same edge, the system comprising:
the detection module is used for detecting that the axial direction of a camera lens is vertical to the side face of the display panel, and the detection camera acquires images of the upper surface, the lower surface and the side face of the display panel at the same time by one-time image acquisition;
the processing unit is used for analyzing the image and acquiring the defect information of the edge area of the display panel;
the detection camera is once got for instance and is acquireed simultaneously the image of display panel upper surface, lower surface and side specifically includes:
the detection camera acquires an image of the upper surface of the edge area through a first reflector, and the first reflector is obliquely positioned on the upper surface of the edge area;
the detection camera acquires an image of the lower surface of the marginal area through a second reflector, and the second reflector is obliquely positioned on the lower surface of the marginal area;
the detection camera acquires the image of the side surface through a third reflector group, and the third reflector group is two reflectors which are positioned on the side surface and are mutually obliquely and parallelly arranged.
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| CN110567970A (en) * | 2019-09-23 | 2019-12-13 | 上海御微半导体技术有限公司 | edge defect detection device and method |
| CN112129782A (en) * | 2020-09-09 | 2020-12-25 | 武汉精测电子集团股份有限公司 | Method and device for detecting foreign matter layering of display panel |
| CN213209949U (en) * | 2020-09-09 | 2021-05-14 | 武汉精立电子技术有限公司 | Display panel defect detection device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567970A (en) * | 2019-09-23 | 2019-12-13 | 上海御微半导体技术有限公司 | edge defect detection device and method |
| CN112129782A (en) * | 2020-09-09 | 2020-12-25 | 武汉精测电子集团股份有限公司 | Method and device for detecting foreign matter layering of display panel |
| CN213209949U (en) * | 2020-09-09 | 2021-05-14 | 武汉精立电子技术有限公司 | Display panel defect detection device |
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