Display Panel Isolation Structure for Signal Interference Reduction
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Solution Overview
Problem
Current electronic display products face challenges in simultaneously achieving excellent touch control and display functions due to limitations in their structural design.
Innovation Solution
A display panel design that includes a substrate with a display function layer, an isolation structure, and a touch structure. The isolation structure features first and second openings, with the second openings arranged below a dummy electrode in the touch structure to reduce signal interference between touch and display signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the touch structure and display structure are integrated in the same substrate, then device complexity is reduced, but signal interference between touch and display functions increases
Solution Approach 1:
The patent divides the substrate into multiple isolation regions using isolation structures (such as isolation trenches or isolation walls) that physically separate the touch electrode areas from the display pixel areas. This segmentation prevents electrical signal interference while maintaining structural integration, as the isolation structures create distinct functional zones within the same substrate layer.
Solution Approach 2:
The patent introduces isolation structures as intermediary elements between the touch electrodes and display pixels. These isolation structures act as mediators that block or shield electrical signals, preventing interference from propagating between adjacent functional areas while allowing the overall device to remain integrated.
2Ease of operation
If the touch electrode area is increased to improve touch sensitivity, then touch control performance is improved, but the area available for light transmission and display function is reduced
Solution Approach 1:
The patent applies different structural qualities to different regions: the touch electrode areas are designed with larger coverage and optimized conductivity for sensitivity, while the display pixel areas maintain optimized light transmission properties. The isolation structures create local boundaries that allow each region to be optimized independently for its specific function without compromising the other.
Solution Approach 2:
The patent resolves the area conflict by utilizing vertical dimensionality through multi-layer structures. Touch electrodes, isolation structures, and display pixels are arranged in different vertical layers, allowing the touch electrode area to extend horizontally for sensitivity while light transmission occurs through vertical pathways in the display regions, effectively decoupling the area requirements of both functions.
Data Source
AI summary
Disclosed are a display panel and a display device. The display panel includes a display area, with at least one first area. The display panel further includes a substrate, and a display function layer, an isolation structure, and a touch structure. The display function layer includes a plurality of light-emitting devices. The isolation structure includes a plurality of first openings and second openings. The plurality of second openings are located in the first area, and the first opening is configured to define the light-emitting device. The touch structure includes a dummy electrode, and an orthographic projection of at least one second opening on the substrate is located within an orthographic projection of the dummy electrode on the substrate. A risk of interference between a driving signal for touch and a driving signal for display may be reduced, so as to ensure touch and display functions of the display panel.