Image Acquiring Device Coordinate Correction for LCD Defect Repair
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Solution Overview
Problem
In the manufacturing process of liquid crystal display panels, mechanical errors between machines can cause defects to be misaligned, leading to inefficiencies in defect detection and repair, as well as increased equipment depreciation due to frequent lens switching and potential failure to capture defects within the visual field.
Innovation Solution
An image acquiring device and method that corrects coordinates by initially acquiring a defect's first coordinate, adjusting the photographing device to center the defect within the visual field, recording a second coordinate, and providing this to a data management system for precise defect location and operation, while calculating a coordinate offset to improve subsequent defect detection and repair efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the color film camera moves to the defect position according to coordinates uploaded by the AOI machine, then the defect detection process is automated, but the defect may not be at the center of the visual field due to mechanical errors between machines
Solution Approach 1:
The patent applies preliminary action by performing coordinate correction before defect detection. The system pre-calculates coordinate offset values between the AOI machine and color film camera through calibration, and uses these pre-established correction values to adjust defect coordinates before the camera moves to capture images, ensuring defects are properly centered without real-time mechanical adjustments
Solution Approach 2:
The patent replaces mechanical coordinate alignment with a computational coordinate correction system. Instead of relying on precise mechanical positioning between machines, the system uses software-based coordinate transformation and offset compensation to achieve accurate defect localization, substituting mechanical precision requirements with computational correction
2Productivity
If the defect is not at the center of the visual field, then the defect can still be detected, but the high and low magnification lenses must be switched back and forth, causing low repair efficiency and increased equipment depreciation
Solution Approach 1:
The patent applies preliminary action by pre-positioning the defect at the center of the visual field through coordinate correction before the repair process begins. This preliminary centering ensures that subsequent high-magnification lens operations can proceed without requiring back-and-forth switching to low magnification for defect localization, saving time and reducing wear
Solution Approach 2:
The patent applies local quality by optimizing the specific region where the defect is positioned within the visual field. By ensuring the defect is precisely centered rather than merely present in the field of view, the system creates optimal local conditions for high-magnification repair operations, eliminating the need for magnification switching
Data Source
AI summary
The present application provides an image acquiring device and a method of correcting coordinates of the image acquiring device, wherein the method includes: detecting a coordinate of a defect detected in a process; initializing a position of a photographing device according to the coordinate of the defect detected in a preprocessing; then adjusting the position of the photographing device according to a position of the defect in the picture currently captured by the photographing device, so that the defect is located at the center of the picture currently captured by the photographing device; recording the coordinate of the defect at the center of the picture; and providing the coordinate of the defect at the center of the picture to a data management system.