Dual Imaging Systems for LCD Panel Grinding Measurement
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Solution Overview
Problem
Existing apparatuses for measuring ground amounts of liquid crystal display panels cannot determine if the lower marginal portions have been adequately ground, leading to potential defects and yield degradation due to incomplete grinding.
Innovation Solution
An apparatus with a grinding unit and dual imaging systems to produce images of both upper and lower marginal portions, allowing for accurate measurement of ground amounts on both surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single imaging system is used to measure ground amounts, then the device complexity is reduced, but the measurement precision is insufficient because only one surface can be measured
Solution Approach 1:
The imaging system is segmented into two separate imaging systems: a first imaging system for capturing images of the upper surface and a second imaging system for capturing images of the lower surface. This segmentation allows each imaging system to independently measure one surface, achieving complete measurement of both surfaces while maintaining manageable device complexity.
Solution Approach 2:
The measurement capability is extended from a single surface to both upper and lower surfaces by adding the second imaging system positioned to capture the lower surface. This dimensional extension ensures comprehensive measurement coverage without compromising measurement precision.
2Reliability
If only the upper marginal portion is measured, then the measurement process is simplified, but the reliability is reduced due to undetected incomplete grinding on the lower surface
Solution Approach 1:
The measurement function is segmented into two independent measurement paths: one for the upper surface and one for the lower surface. This ensures that both surfaces are reliably measured, preventing undetected incomplete grinding while maintaining a structured and manageable system architecture.
Solution Approach 2:
The system provides feedback by capturing and analyzing images from both upper and lower surfaces. This feedback mechanism ensures that incomplete grinding on either surface is detected, thereby improving reliability through comprehensive quality assurance.
3Measurement precision
If dual imaging systems are added to measure both surfaces, then the measurement precision and reliability are improved, but the device complexity increases
Solution Approach 1:
The dual imaging system is designed with clear segmentation: the first imaging system is positioned for upper surface measurement and the second imaging system is positioned for lower surface measurement. This segmentation allows each subsystem to be optimized independently, achieving comprehensive measurement precision while managing overall device complexity through modular architecture.
4Manufacturing precision
If incomplete grinding is not detected, then the production process continues without interruption, but the manufacturing precision deteriorates due to defective panels
Solution Approach 1:
The system performs preliminary measurement of both upper and lower surfaces before the grinding process is completed and the panel moves to the next production stage. By detecting incomplete grinding early, the system prevents defective panels from advancing, thereby maintaining manufacturing precision without significantly impacting overall productivity.
Solution Approach 2:
The imaging systems provide real-time feedback on grinding quality for both surfaces. This feedback enables immediate detection of incomplete grinding, allowing for timely corrective action that maintains manufacturing precision while minimizing production interruptions.
Data Source
AI summary
An apparatus for measuring ground amounts of a liquid crystal display panel includes a grinding unit for grinding upper and lower marginal portions of a unit liquid crystal display panel, a first imaging system for producing images of a ground surface of the upper marginal portion of the unit liquid crystal display panel, and a second imaging system for producing images of a ground surface of the lower marginal portion of the unit liquid crystal display panel.