Display Substrate Black Patterns for Grinding Boundary Detection
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Solution Overview
Problem
Existing display devices face challenges in accurately measuring the grinding amount of substrate edges using vision cameras, leading to increased misrecognition rates and defective processing, which can increase manufacturing costs and greenhouse gas emissions.
Innovation Solution
Incorporating a first pattern outside the dam between the substrates to enhance boundary recognition of grinding surfaces, ensuring clear identification of grinding amounts through vision cameras, thereby reducing misrecognition and defective processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a vision camera is used to measure the grinding amount of substrate edges, then the measurement process can be automated, but the boundary recognition rate deteriorates due to poor visibility of grinding surfaces
Solution Approach 1:
A black pattern is formed on the grinding surface to create a high-contrast visual marker. This color change enables the vision camera to clearly distinguish the grinding surface boundaries from the surrounding areas, thereby improving boundary recognition rate while maintaining automated measurement capability.
2Ease of manufacture
If the edge portion of substrates is ground to provide curved or inclined surfaces, then the display device can be manufactured, but measurement defects increase due to poor boundary visibility
Solution Approach 1:
The black pattern formed on the grinding surface creates a distinct visual contrast that enables accurate detection of grinding boundaries by the vision camera. This resolves the measurement precision issue while maintaining the ease of substrate edge grinding processing.
3Device complexity
If no additional patterns are added to the substrate, then the device structure remains simple, but the boundary recognition capability deteriorates
Solution Approach 1:
A black pattern is added to the grinding surface to provide visual contrast for boundary recognition. This minimal addition significantly improves measurement precision without substantially increasing device structure complexity.
Data Source
AI summary
A display device can include a first substrate having a first grinding surface at an edge thereof, a second substrate facing the first substrate and having a second grinding surface at an edge thereof, a plurality of pixels disposed on one surface of the first substrate, a display area including the plurality of pixels, a non-display area disposed outside the display area, a dam disposed between the first substrate and the second substrate in the non-display, and a first pattern disposed outside the dam.