OLED Display Panel Touch Electrode Opposite Sides Configuration
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Solution Overview
Problem
Existing flexible OLED touch technologies face issues with stress-induced separation or breakage of touch electrode layers and reflectance differences causing shadow elimination and moire fringe problems, which affect electrical and display performance.
Innovation Solution
The OLED display panel design features a first and second touch electrode layer disposed on opposite sides of the OLED light-emitting layer, reducing stress and reflectance differences, allowing the OLED layer to serve as a substrate and minimizing substrate material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If touch electrode layers are formed on the same side of OLED light-emitting layer, then device complexity is reduced, but stress-induced separation or breakage occurs and moire fringe problems arise
Solution Approach 1:
The patent transitions from a two-dimensional arrangement where both touch electrode layers are on the same side to a three-dimensional arrangement where the first touch electrode layer is on the front side and the second touch electrode layer is on the rear side of the OLED light-emitting layer. This spatial separation in different dimensions eliminates stress-induced separation and breakage while preventing moire fringe issues, thereby improving reliability without significantly increasing device complexity.
2Manufacturing precision
If multiple substrate materials are used for touch electrodes, then manufacturing precision is improved, but loss of substance increases
Solution Approach 1:
The OLED light-emitting layer substrate serves multiple functions: it acts as the substrate for the OLED structure itself and simultaneously serves as the substrate for both the first touch electrode layer (on the front side) and the second touch electrode layer (on the rear side). This multi-functional use of a single substrate material eliminates the need for separate substrate materials for touch electrodes, reducing material loss while maintaining manufacturing precision.
Data Source
AI summary
The embodiments of the present disclosure provide an OLED display panel, a fabrication method thereof and an OLED display device, which improve optical, mechanical, and electrical characteristics of the OLED display panel. The OLED display panel includes an OLED light-emitting layer and touch electrodes. The touch electrode includes a first touch electrode layer and a second touch electrode layer, and the OLED light-emitting layer is disposed between the first touch electrode layer and the second touch electrode layer.