Display Substrate Hollow Structures for Bend-Resistant Touch Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In OLED display products with integrated touch structures, the bending stress during large-angle bending leads to wrinkling or peeling of the inorganic insulating layer at the groove structure, causing touch line failures and poor sensitivity due to reduced adhesion between the inorganic and organic insulating layers.
Innovation Solution
A display substrate design featuring a base substrate with an encapsulation dam, an organic insulating layer with groove structures, and an inorganic insulating layer with hollowed-out structures that cover the grooves, ensuring the inorganic layer maintains adhesion with touch lines and preventing peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inorganic insulating layer is applied over the groove structure in the organic insulating layer, then the touch structure can be formed, but the inorganic insulating layer wrinkles or peels due to bending stress
Solution Approach 1:
The patent removes the inorganic insulating layer from the groove structure region, creating a hollowed-out structure that eliminates the source of wrinkling and peeling while preserving the touch structure functionality in the remaining areas
Solution Approach 2:
The inorganic insulating layer is segmented to cover only specific regions (touch lines and touch electrodes) while leaving the groove structure region exposed, allowing differential stress management across different functional areas
2Ease of manufacture
If the inorganic insulating layer covers the groove structure, then insulation is provided, but adhesion between inorganic and organic insulating layers is reduced causing peeling
Solution Approach 1:
The inorganic insulating layer is extracted from the groove structure region where adhesion problems occur, eliminating the peeling issue while maintaining insulation in critical areas through alternative configurations
Solution Approach 2:
The inorganic insulating layer is applied with different coverage characteristics in different regions - fully covering touch lines and electrodes where insulation is critical, while leaving the groove structure region exposed where adhesion problems would occur
3Adaptability or versatility
If the touch lines extend to the non-display region, then touch functionality is integrated, but bending stress causes touch line failures
Solution Approach 1:
The inorganic insulating layer is removed from regions where touch lines traverse the groove structure, eliminating the peeling that causes touch line failures while preserving touch line continuity and functionality
Data Source
AI summary
A display substrate, a display panel and a display apparatus are provided. The display substrate comprises a base substrate, which includes a display area and a non-display area on one side of the display area; an encapsulation dam in the non-display area and arranged around the display area, where an organic insulating layer has a groove structure on the side of the packaging dam away from the display area; and a touch structure, which is located on the side of the organic insulating layer facing away from the base substrate, and which comprises a plurality of touch lines extending to the non-display area; an inorganic insulating layer has a hollow structure on the side of the packaging dam away from the display area, and the hollow structure covers the groove structure and does not overlap with the orthographic projection of the plurality of touch lines.