Touch Electrode Layout for Special-Shaped Display Areas
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Solution Overview
Problem
The completeness of electrode patterns in touch display panels, especially near special-shaped areas such as round corners or cutout holes, is often compromised, leading to poor touch performance due to incomplete electrode patterns which affect electrical parameters like capacitance values.
Innovation Solution
A touch display panel design where a touch electrode layer with first and second electrodes arranged in an array extends into special-shaped areas, ensuring their orthographic projections overlap with the special-shaped areas, thereby increasing the incomplete electrode pattern area and improving completeness, which enhances touch performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the touch electrode layer is arranged only within the display area boundaries, then the manufacturing process is simple and the electrode layout is straightforward, but the electrode patterns become incomplete near special-shaped areas causing poor touch performance
Solution Approach 1:
The touch electrode layer is extended from the traditional two-dimensional display area into the third spatial dimension by projecting into the non-display area. This dimensional extension allows the electrode patterns to maintain completeness near special-shaped areas while keeping the overall structure manageable, resolving the contradiction between touch performance and layout complexity.
Solution Approach 2:
The electrode patterns are designed to extend into the non-display area in advance, before the actual touch detection process. This preliminary extension ensures that the electrode patterns remain complete near special-shaped areas, preventing touch performance degradation without requiring complex real-time adjustments during operation.
2Adaptability or versatility
If the electrode patterns are kept complete within the display area, then the electrical parameters remain stable, but the electrode layer cannot extend into special-shaped areas reducing adaptability
Solution Approach 1:
The electrode layer utilizes the non-display area as an additional spatial dimension to maintain pattern completeness. By extending into this extra space, the electrodes can adapt to special-shaped display areas without compromising their geometric integrity or electrical parameter stability.
Solution Approach 2:
The non-display area serves as an intermediary zone that mediates between the display area and the special-shaped areas. The electrode patterns extend through this intermediary region, allowing them to adapt to various special-shaped configurations while maintaining complete, stable patterns throughout.
3Reliability
If the touch electrode layer extends into the non-display area, then the electrode pattern completeness improves near special-shaped areas, but the device structure becomes more complex
Solution Approach 1:
The extension into the non-display area utilizes available spatial dimension rather than adding vertical layers or complex three-dimensional structures. This approach improves electrode completeness while minimizing increases in overall device structural complexity.
Data Source
AI summary
The present disclosure provides a touch display panel, a touch display device and a manufacturing method. The touch display panel includes: a display substrate including a display area and a non-display area adjacent to the display area, wherein the non-display area includes a special-shaped area; and a touch electrode layer on the display substrate. The touch electrode layer includes a plurality of first electrodes and a plurality of second electrodes arranged in an array. The first electrodes are insulated from the second electrodes. The special-shaped area is an area that causes at least one of the plurality of first electrodes or at least one of the plurality of second electrodes to be incomplete. An orthographic projection of a part of the touch electrode layer on the display substrate overlaps with an orthographic projection of a part of the special-shaped area on the display substrate.