Color Filter Substrate Groove Isolates Black Matrix from Moisture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing color filter substrates face issues with moisture intrusion due to direct contact between external moisture and the black matrix layer, which can lead to detachment during laser cutting, reducing yield and affecting the reliability of display devices.
Innovation Solution
A color filter substrate design featuring a groove at the edge of the frame area, spacing the black matrix layer from the edge and laser cutting line, thereby isolating external moisture and preventing intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the black matrix layer is directly connected to the outside, then the structure is simple and easy to manufacture, but moisture can easily intrude along the black matrix layer
Solution Approach 1:
The frame area is segmented into a first frame area and a second frame area by a groove, separating the black matrix layer from the outer edge. This segmentation creates a physical barrier that prevents moisture from directly contacting the black matrix layer while maintaining manufacturing simplicity
Solution Approach 2:
The groove acts as an intermediary structure between the black matrix layer and the external environment. It provides a physical separation that blocks moisture intrusion paths without requiring additional complex protective layers or structures
2Ease of manufacture
If laser cutting is performed on the display device, then the device can be processed, but the laser contacts the black matrix layer causing edge detachment
Solution Approach 1:
The groove divides the frame area into distinct regions, positioning the black matrix layer away from the laser cutting line. This segmentation ensures that the laser cutting process does not directly contact the black matrix layer, preventing edge detachment while allowing successful laser cutting
Solution Approach 2:
The black matrix layer is extracted from the direct path of the laser cutting line by the groove separation. The groove effectively removes the black matrix layer from the critical laser cutting zone, preventing damage during the cutting process
3Device complexity
If the black matrix layer is positioned close to the edge, then the structure is compact, but moisture intrusion risk increases
Solution Approach 1:
The groove creates a segmented structure that maintains compact overall dimensions while providing sufficient separation between the black matrix layer and the external edge. This segmentation achieves both compactness and moisture protection
Solution Approach 2:
The groove extends in the thickness dimension, creating a vertical barrier that provides separation between the black matrix layer and the external environment without significantly increasing the planar footprint. This dimensional approach maintains compactness while preventing moisture contact
Data Source
AI summary
A color filter substrate and a display device are provided. The color filter substrate includes a color filter base and a black matrix layer. The color filter base includes an active area and a frame area disposed beside the active area. The black matrix layer is disposed on the color filter substrate and positioned in the active area and a portion of the frame area. An edge of the frame area of the color filter base is provided with a groove.