Display Panel Terminal Protection Layer Pattern Design
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Solution Overview
Problem
Display panel terminals are prone to corrosion from water and oxygen in the external environment, leading to degradation of their electrical properties due to exposure of lateral surfaces.
Innovation Solution
A display panel design that includes a terminal protection layer pattern with a first shielding region and a first opening region, overlapping with the terminal on the base substrate, preventing direct exposure to the external environment, and optionally combined with a barrier layer pattern and planarization layer protection pattern, using materials like silicon nitride, silicon oxide, or organic materials to shield the terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal lateral surface is exposed to the external environment for electrical connection, then the terminal can be electrically connected with external control assembly, but the terminal lateral surface is corroded by water and oxygen leading to degradation of electrical properties
Solution Approach 1:
A terminal protection layer pattern is formed as a thin film structure that covers the lateral surface of the terminal. This protection layer pattern includes a first shielding region that extends over the edge of the terminal's orthographic projection, creating a physical barrier that prevents water and oxygen from corroding the terminal lateral surface while allowing the terminal to maintain its electrical connection function.
2Reliability
If a terminal protection layer pattern is formed to cover the terminal edge, then the terminal is protected from corrosion, but the manufacturing process complexity increases
Solution Approach 1:
The terminal protection layer pattern is formed in the same layer as the barrier layer pattern that protects the display structure. By merging these two protection functions into a single manufacturing step, the patent avoids the need for separate processing steps, thereby reducing manufacturing process complexity while achieving both terminal protection and display structure protection simultaneously.
Solution Approach 2:
The protection layer pattern serves multiple functions: it protects the terminal lateral surface from corrosion, protects the display structure, and can be integrated with the barrier layer pattern. This multi-functionality reduces the overall complexity of the manufacturing process by consolidating multiple protection needs into a single structural solution.
3Reliability
If the terminal protection layer pattern overlaps with the terminal edge, then comprehensive protection is achieved, but the area of the protection layer increases
Solution Approach 1:
The terminal protection layer pattern is designed with a first shielding region that specifically targets the edge area of the terminal where corrosion risk is highest. The protection layer extends just enough to cover the edge region in the orthographic projection, providing localized protection where it is most needed rather than uniformly covering the entire terminal area, thus optimizing the balance between protection coverage and material usage.
Data Source
AI summary
A display panel, a manufacturing method thereof, and a display device are disclosed. The display panel includes: a base substrate, provided with a terminal and a terminal protection layer pattern; the terminal protection layer pattern includes a first shielding region and a first opening region, an orthographic projection of the first shielding region on the base substrate and an orthographic projection of the terminal on the base substrate have an overlapping region, the overlapping region is located at an edge of the orthographic projection of the terminal on the base substrate, and an orthographic projection of the first opening region on the base substrate is located in the orthographic projection of the terminal on the base substrate.