Touch Display Panel Coplanar Electrode and Color Resist Design
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Solution Overview
Problem
Flexible touch display panels face issues with mechanical reliability, being excessively thick and prone to cracking or peeling when bent repeatedly, which affects their usage and functionality.
Innovation Solution
A touch display panel design featuring a light-emitting display layer with a first and second touch electrode arranged in intersecting directions, alongside a color resist layer on the same layer, reducing thickness and improving bending performance while maintaining stability and light-emitting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the touch display panel uses a conventional multi-layer structure with color resist layer and touch electrodes stacked sequentially, then the panel provides complete functionality, but the panel thickness increases and bending performance deteriorates
Solution Approach 1:
The patent combines the color resist layer and the first touch electrode into the same layer, making them coplanar rather than stacked. This merging of functions into a single layer reduces the overall panel thickness while maintaining both the color filtering function and the touch sensing function, thereby improving bending performance without sacrificing functionality.
Solution Approach 2:
The invention transitions from a vertical stacking arrangement (where the color resist layer and touch electrode are stacked in the thickness direction) to a horizontal arrangement (where they are positioned side-by-side in the plane of the panel). This dimensional change from vertical to horizontal organization reduces the thickness direction dimensions while maintaining functional separation.
2Length of stationary object
If the color resist layer and first touch electrode are stacked in separate layers, then each component can be optimized independently, but the overall panel structure becomes thicker and more prone to cracking
Solution Approach 1:
The patent merges the color resist layer and first touch electrode into a single coplanar layer, reducing the number of stacked layers and simplifying the overall structure. This reduces panel thickness and the complexity of the layer structure while maintaining independent functional optimization through spatial separation within the same layer.
3Reliability
If the touch display panel is made thinner to improve flexibility, then bending performance improves, but the structural stability and support for functional layers may be compromised
Solution Approach 1:
By combining the color resist layer and first touch electrode into the same layer, the patent creates a more integrated and stable structure that provides mutual support. This coplanar arrangement enhances structural stability within the reduced thickness, preventing layer peeling and maintaining strength while improving flexibility.
Data Source
AI summary
A touch display panel includes a light-emitting display layer, first touch electrodes, a color resist layer, and second touch electrodes. The light-emitting display layer includes a plurality of light-emitting units arranged in an array; the first touch electrodes are located on the side of the light-emitting display layer facing a light-emitting surface of the touch display panel, and are arranged in a first direction parallel to the touch display panel; the color resist layer includes a plurality of color resist units arranged in an array; the color resist units are arranged right opposite to the light-emitting units, and the color resist layer and the first touch electrodes are arranged side by side; the second touch electrodes are located on the side of the light-emitting display layer facing the light-emitting surface of the touch display panel, and are arranged in a second direction parallel to the touch display panel.