Shielding Resin Inspection via UV Reflection on Display Panels
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Solution Overview
Problem
Existing display panel inspection methods fail to accurately and efficiently determine if the shielding resin is properly applied, which is crucial for preventing damage from static electricity.
Innovation Solution
A method involving the formation of a backplane, organic light-emitting layer, encapsulation layer, and polarizing film in the display area, with a shielding resin applied at the boundary between the polarizing film and the protective layer. A test pattern made of the same material as the shielding resin is applied to a dummy area, and ultraviolet light is used to inspect the application, determining the optimal angle and light amount for reflection analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional inspection methods are used, then the inspection process is simple, but the accuracy and efficiency of determining shielding resin application quality is insufficient
Solution Approach 1:
The patent applies a test pattern made of the same material as the shielding resin in a dummy area. This test pattern serves as a reference copy that allows the inspection system to compare reflected light characteristics against known standards, enabling accurate determination of shielding resin application quality without requiring complex multi-parameter measurement systems
Solution Approach 2:
The patent utilizes ultraviolet light reflection properties and optical characteristics to inspect the shielding resin. By measuring the reflected light intensity and characteristics at specific angles, the system can detect variations in shielding resin application quality through changes in optical properties, providing accurate inspection with relatively simple equipment
2Reliability
If the shielding resin is not properly applied, then the manufacturing process is faster, but the display panel becomes vulnerable to static electricity damage
Solution Approach 1:
The patent implements an inspection system that provides feedback on shielding resin application quality. By measuring the reflected ultraviolet light from the shielding resin and comparing it against the test pattern, the system can identify defects in real-time, allowing for immediate correction and ensuring reliable static electricity protection without compromising manufacturing efficiency
Solution Approach 2:
The patent applies a test pattern in advance during the manufacturing process to establish reference standards for shielding resin application. This preliminary action allows subsequent inspection to quickly and accurately determine quality without requiring complex real-time analysis, thus maintaining both reliability and productivity
3Measurement precision
If multiple inspection parameters are measured, then the inspection accuracy is improved, but the inspection time and complexity increase
Solution Approach 1:
The patent extracts the essential inspection parameter to be the reflected ultraviolet light intensity at specific angles. By focusing on this key optical characteristic and using the test pattern as a reference, the system can achieve accurate shielding resin quality determination without measuring multiple complex parameters simultaneously, thus reducing inspection time while maintaining precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for convenient and accurate inspection of the shielding resin application, ensuring the display panel is protected from static electricity damage.
Implementation Method 1
irradiating the test pattern with ultraviolet light using a lighting device, and determining an angle and a light amount of the lighting device that make the ultraviolet light reflected from the test pattern to satisfy a specified optical condition
Data Source
AI summary
A method for inspecting a display device includes forming a backplane, an organic light-emitting layer, an encapsulation layer and a polarizing film in a display area, bonding a driver circuit to a non-display area and covering the driver circuit by a protective layer, applying a shielding resin between the polarizing film and the protective layer, and applying a test pattern made of a same material as the shielding resin to a dummy area of the non-display area, irradiating the test pattern with ultraviolet light using a lighting device, and determining an angle and a light amount of the lighting device that make the ultraviolet light reflected from the test pattern to satisfy a specified optical condition, irradiating the shielding resin with ultraviolet light based on the determined angle and light amount, and determining whether the shielding resin is properly applied by analyzing ultraviolet light reflected from the shielding resin.