CN-122016830-A - High-resolution defect detection equipment and low-resolution defect detection method based on same

CN122016830ACN 122016830 ACN122016830 ACN 122016830ACN-122016830-A

Abstract

The invention provides high-resolution defect detection equipment and a low-resolution defect detection method based on the high-resolution defect detection equipment, which relate to the field of display detection, wherein a scanning camera shoots frames by frames in the motion process of a display panel to be detected to obtain multi-frame high-resolution images, a defect detection module detects each frame of high-resolution images frame by frame to detect micro-defects of the display panel to be detected, the method comprises the steps that the defect detection module compresses each frame of high-resolution images received by the defect detection module frame by frame to obtain multi-frame low-resolution images and sends the multi-frame low-resolution images to a detection control module, the detection control module carries out image processing at least comprising splicing on the multi-frame low-resolution images received by the detection control module to obtain a low-resolution integral image of the display panel to be detected, and the detection control module carries out low-resolution macro-defect detection on the display panel to be detected based on the low-resolution integral image, so that high-resolution micro-defect detection and low-resolution macro-defect detection are realized through a set of high-resolution defect detection equipment.

Inventors

GUO JIANG
REN PAN
LI YUFENG
XIE QINCHUAN

Assignees

成都中嘉微视科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. The low resolution defect detection method based on high resolution defect detection equipment is applied to defect detection of a display panel, and is characterized in that the high resolution detection equipment comprises a scanning camera, a detection control module and a defect detection module, wherein the scanning camera is used for shooting frames by frames in the movement process of the display panel to be detected so as to obtain multi-frame high resolution images, and the defect detection module is used for detecting each frame of the high resolution images frame by frame under the control of the detection control module so as to detect micro defects of the display panel to be detected, and the low resolution defect detection method comprises the following steps: The defect detection module compresses each frame of the high-resolution image received by the defect detection module frame by frame to obtain a plurality of frames of low-resolution images, and sends the plurality of frames of low-resolution images to the detection control module; the detection control module performs image processing at least comprising stitching on the multi-frame low-resolution images received by the detection control module so as to obtain a low-resolution integral image of the display panel to be detected; And the detection control module detects the macroscopic defect of the low resolution on the display panel to be detected based on the low resolution integral image.
2. The method of claim 1, wherein the defect detection module compresses each frame of the high resolution image it receives frame-by-frame to obtain a multi-frame low resolution image, comprising: The defect detection module calculates the frame number of the multi-frame low-resolution image and the theoretical low-resolution size of each frame of the low-resolution image based on the frame number of the multi-frame high-resolution image, the theoretical high-resolution size of each frame of the high-resolution image and the target compression ratio; The defect detection module compresses each frame of the high resolution image received by the defect detection module into the low resolution image with the resolution size being the theoretical low resolution size based on the theoretical low resolution size of each frame of the low resolution image.
3. The method of claim 2, wherein the defect detection module compresses each frame of the high resolution image it receives into the low resolution image having a resolution size that is the theoretical low resolution size based on the theoretical low resolution size of each frame of the low resolution image, comprising: and compressing the high-resolution image of each frame by adopting an average pooling convolution downsampling mode to obtain the low-resolution image with the resolution being the theoretical low-resolution size.
4. The method of claim 2, wherein the defect detection module sends the multi-frame low resolution image to the detection control module, comprising: Creating an image template containing a plurality of subframes in advance based on the number of frames of the multi-frame low-resolution image, the theoretical low-resolution size of each frame of the low-resolution image; after compressing each frame of the high resolution image it receives into the low resolution image, writing the low resolution image into a corresponding subframe of the image template; And after the scanning camera finishes the scanning, an image template consisting of the multi-frame low-resolution images is sent to the detection control module.
5. The method of claim 4, wherein the number of the scanning cameras is at least two, the at least two scanning cameras are sequentially arranged along a splicing direction perpendicular to the running direction of the display panel to be detected, the number of the defect detection modules is at least two, and each defect detection module corresponds to one scanning camera; and the detection control module performs image processing at least including stitching on all the image templates received by the detection control module from all the defect detection modules after all the scanning cameras complete all the scanning so as to obtain the low-resolution integral image of the display panel to be detected.
6. The method of claim 5, wherein the detecting control module performs image processing including at least stitching on all of the image templates to obtain the low resolution overall image of the display panel to be detected, comprising: an overlapping area is formed between two adjacent image templates in the splicing direction which is parallel to the surface of the display panel to be detected and perpendicular to the running direction of the display panel to be detected; based on the brightness information of the overlapping area between the two adjacent image templates, the brightness of the two adjacent image templates is adjusted to be the same brightness value.
7. The method of claim 6, wherein adjusting the brightness of adjacent two of the image templates to the same brightness value based on the brightness information of the overlapping region between the adjacent two of the image templates comprises: Taking one of the two adjacent image templates as a reference image template and the other image template as an adjusted image template; Calculating the average ratio of the gray average value in the overlapped area of the adjusted image template to the gray average value in the overlapped area of the reference image template; And taking the average value ratio as a global gain coefficient when the brightness of the adjusted image template is adjusted, and adjusting the brightness of the adjusted image template so as to adjust the brightness of two adjacent image templates to be the same brightness value.
8. The method of claim 6, wherein the detecting control module performs image processing including at least stitching on all of the image templates to obtain the low resolution overall image of the display panel to be detected, further comprising: in the process of splicing two adjacent image templates, reserving an overlapping area of one image template of the two image templates, and removing the overlapping area of the other image template; Determining a gradual adjustment weight that smoothly decays from a direction near the center line of the reserved overlapping area to a direction far from the center line of the reserved overlapping area based on a width value of the reserved overlapping area in the splicing direction and a center line of the reserved overlapping area in a direction parallel to the splicing direction; and taking the gradual change adjustment weight as an adjustment weight for adjusting the gray value of each pixel point in the reserved overlapping area, and adjusting the gray value of each pixel point in the reserved overlapping area.
9. The method of claim 8, wherein the detecting control module performs image processing including at least stitching on all of the image templates to obtain the low resolution overall image of the display panel to be detected, further comprising: Splicing a plurality of image templates from a first end of the splicing direction to a second end of the splicing direction, and sequentially splicing two adjacent image templates to obtain the low-resolution integral image of the display panel to be detected; When one of the two adjacent image templates is used as the reference image template and the other image template is used as the adjusted image template, the image template close to the first end of the splicing direction in the two adjacent image templates is used as the reference image template, and the image template close to the second end of the splicing direction is used as the adjusted image template.
10. The high-resolution defect detection equipment is applied to defect detection of a display panel and is characterized by comprising a scanning camera, a detection control module and a defect detection module, wherein the scanning camera is used for shooting a frame by frame in the movement process of the display panel to be detected so as to obtain multi-frame high-resolution images, and the defect detection module is used for detecting the high-resolution images of each frame by frame under the control of the detection control module so as to detect micro defects of the display panel to be detected; And the high resolution defect detection apparatus is further adapted to perform the low resolution defect detection method based on the high resolution defect detection apparatus as claimed in any one of claims 1 to 9.

Description

High-resolution defect detection equipment and low-resolution defect detection method based on same Technical Field The disclosure relates to the technical field of display detection, in particular to high-resolution defect detection equipment and a low-resolution defect detection method based on the same. Background In the manufacturing process of the display panel, not only high-resolution micro defect detection such as, but not limited to, micro cracks and the like, but also low-resolution macro defect detection such as, but not limited to, large-area plaques and the like, is required to be performed on the display panel. The related art provides two sets of cameras and defect detection equipment for respectively completing the high-resolution micro defect detection and the low-resolution macro defect detection, and the two sets of equipment occupy large space and have high cost. Disclosure of Invention The main object of the present disclosure is to provide a high resolution defect detection apparatus and a low resolution defect detection method based thereon, so as to realize high resolution micro defect detection and low resolution macro defect detection by a set of high resolution defect detection apparatuses. In order to achieve the above object, a first aspect of the present disclosure provides a low resolution defect detection method based on a high resolution defect detection device, applied to defect detection of a display panel, the high resolution detection device including a scan camera, a detection control module, and a defect detection module, the scan camera being configured to capture images frame by frame during movement of the display panel to be detected to obtain multiple frames of high resolution images, the defect detection module being configured to detect each frame of high resolution images frame by frame under control of the detection control module to perform micro defect detection of the display panel to be detected, the low resolution defect detection method comprising: The defect detection module compresses each frame of high-resolution image received by the defect detection module frame by frame to obtain a plurality of frames of low-resolution images, and sends the plurality of frames of low-resolution images to the detection control module; The detection control module processes the received multi-frame low-resolution images at least comprising stitching to obtain a low-resolution integral image of the display panel to be detected; the detection control module performs low-resolution macroscopic defect detection on the display panel to be detected based on the low-resolution integral image. In some embodiments of the present disclosure, the defect detection module compresses each frame of high resolution image it receives frame by frame to obtain a multi-frame low resolution image, comprising: The defect detection module calculates the number of frames of multi-frame low-resolution images and the theoretical low-resolution size of each frame of low-resolution images based on the number of frames of multi-frame high-resolution images, the theoretical high-resolution size of each frame of high-resolution images and the target compression ratio; The defect detection module compresses each frame of high-resolution image received by the defect detection module into a low-resolution image with a resolution size being the theoretical low-resolution size based on the theoretical low-resolution size of each frame of low-resolution image. In some embodiments of the present disclosure, the defect detection module compresses each frame of high resolution image received by the defect detection module into a low resolution image having a resolution size that is the theoretical low resolution size based on the theoretical low resolution size of each frame of low resolution image, comprising: And compressing each frame of high-resolution image by adopting an average pooling convolution downsampling mode to obtain a low-resolution image with the resolution size being the theoretical low-resolution size. In some embodiments of the present disclosure, the defect detection module sends a multi-frame low resolution image to the detection control module, comprising: Creating an image template containing a plurality of subframes in advance based on the number of frames of the multi-frame low-resolution image and the theoretical low-resolution size of each frame of the low-resolution image; after compressing each frame of high resolution image received by the receiver into a low resolution image, writing the low resolution image into a corresponding subframe of an image template; after the scanning camera finishes the scanning, an image template consisting of a plurality of frames of low-resolution images is sent to a detection control module. In some embodiments of the disclosure, the number of scanning cameras is at least two, the at least two scanning cameras are sequentially arranged along a