Curved Display Panel Alignment for Seamless Bending Inspection
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Solution Overview
Problem
Automating the inspection of bending defects in flexible curved display panels is challenging due to their curved features, which can cause stop loss and require larger inspection systems to identify alignment marks.
Innovation Solution
An inspection system with support members, imaging devices, and a control unit that verifies and corrects misalignments in flexible display panels, allowing seamless movement and precise bending defect inspection without enlarging the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the flexible display panel is moved seamlessly for automated inspection, then automation is achieved, but stop loss occurs due to curved features
Solution Approach 1:
The system performs preliminary alignment verification using imaging devices to capture corner images and detect misalignment direction before the bending inspection process. This preliminary detection allows the system to correct alignment issues in advance, preventing stop loss during the inspection process and ensuring seamless movement of the flexible display panel through automated control of support members.
2Measurement precision
If the vision imaging area is expanded to identify alignment marks, then alignment accuracy is improved, but the inspection system size increases
Solution Approach 1:
The system divides the imaging task into multiple imaging devices positioned at different locations, each capturing images of specific corners of the flexible display panel. This segmentation allows the system to achieve comprehensive alignment verification without requiring a single large imaging area, thus maintaining compact system size while ensuring accurate alignment mark identification through distributed corner image capture.
Data Source
AI summary
An inspection system for a display device includes a plurality of support members supporting a bottom of an inspection panel of the display device. A plurality of imaging devices captures images of four corners of the inspection panel. A position misalignment confirmation unit verifies a misaligned direction of the inspection panel based on gray values of the four corner images of the inspection panel. A control unit corrects a misalignment of the inspection panel determined by the position misalignment confirmation unit. The control unit controls support member driving means that drives the plurality of support members to correct the misalignment.