Display Panel Signal Shielding Layer Isolation Structure
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Solution Overview
Problem
Display panels experience signal crosstalk issues due to the design of touch-based intelligent mobile terminals, leading to poor touch performance, particularly in high screen-to-body ratio designs.
Innovation Solution
A display panel structure featuring a substrate with a signal shielding layer, a protection layer, and an isolation structure that includes first and second isolation openings, where the signal shielding layer covers the second isolation openings to prevent signal interference, and the protection layer shields the signal shielding layer from damage during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a signal shielding layer is added to reduce signal crosstalk, then touch performance is improved, but the device structure becomes more complex
Solution Approach 1:
The signal shielding layer is segmented into multiple isolated shielding regions corresponding to different sub-pixel areas. Each shielding region is independently formed and positioned to shield specific signal lines, thereby reducing signal crosstalk while maintaining manageable structural complexity through modular segmentation.
Solution Approach 2:
The signal shielding layer implements local shielding by positioning shielding regions only in areas where signal crosstalk occurs between touch electrodes and signal lines. This localized approach improves touch performance where needed without adding unnecessary complexity to the entire device structure.
2Manufacturing precision
If the signal shielding layer is exposed during manufacturing, then manufacturing precision can be maintained, but the shielding layer may be damaged causing shielding failure
Solution Approach 1:
The signal shielding layer is formed in advance before subsequent etching and manufacturing steps. By establishing the shielding layer early in the manufacturing process, it can protect signal lines during later processing steps, preventing damage that would compromise shielding effectiveness while allowing precise etching operations to proceed.
Solution Approach 2:
The signal shielding layer acts as a protective cushion for underlying signal lines during manufacturing processes. By placing the shielding layer beforehand, it absorbs or deflects potential damage from subsequent manufacturing steps, ensuring shielding effectiveness is maintained throughout the manufacturing process.
Data Source
AI summary
Disclosed are a display panel, a manufacturing method therefor, and a display device. The the display panel includes a substrate; a signal shielding layer, disposed on the substrate; a protection layer, disposed on the signal shielding layer; an isolation structure, disposed on the signal shielding layer and defined with a plurality of first isolation openings and a plurality of second isolation openings; and a light-emitting function layer, including a plurality of light-emitting devices. Orthogonal projections of the signal shielding layer and the protection layer on the substrate cover an orthogonal projection of the second isolation opening on the substrate separately. An area of the second isolation opening may serve as a light transmission hole area; and the signal shielding layer may effectively shield interference of a touch signal. Meanwhile, the signal shielding layer may be protected by the protection layer from damage thereby avoiding shielding failure and improving touch performance.