Display Panel Isolation Structure for Electrode Short-Circuit Prevention
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Solution Overview
Problem
Existing display panels face challenges in simplifying their structure while integrating touch functionality without compromising display effects, particularly due to uneven distribution of conductive materials affecting display disparity.
Innovation Solution
A display panel design that includes a substrate with a pixel defining layer, isolation structures, and a functional layer with electrodes and touch electrodes, where the isolation structures are insulated and spaced apart to prevent short-circuiting, and the second electrode is strategically positioned to balance conductive material distribution, thereby simplifying the structure and improving display effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If touch electrodes are integrated into the functional layer to simplify structure, then device complexity is reduced, but display uniformity deteriorates due to uneven conductive material distribution
Solution Approach 1:
The functional layer is segmented into three distinct electrodes (first electrode, touch electrode, second electrode) with different functions. The first electrode is dedicated to driving the light-emitting unit, the touch electrode handles touch sensing, and the second electrode compensates for conductive material distribution. This segmentation allows each electrode to be optimized for its specific function while maintaining overall display uniformity.
Solution Approach 2:
The second electrode is strategically positioned in non-touch areas and between pixel openings where conductive material is sparse. This local quality approach concentrates conductive material in specific regions where it is most needed for display uniformity, rather than distributing it evenly across the entire functional layer.
2Reliability
If isolation structures are added to prevent short-circuiting between electrodes, then reliability is improved, but device complexity increases
Solution Approach 1:
The isolation structure serves multiple functions simultaneously: it electrically isolates the first electrode from the touch electrode and second electrode to prevent short-circuiting, provides mechanical support for the functional layer, and helps define the spatial arrangement of electrodes. This merging of functions reduces the need for additional separate components.
Solution Approach 2:
The isolation structure is designed as a multi-functional component that performs electrical insulation, mechanical support, and spatial organization functions. By making the isolation structure universal and multi-functional, the overall device complexity is minimized while maintaining reliability.
3Manufacturing precision
If the second electrode is added to balance conductive material distribution, then display uniformity is improved, but device complexity increases
Solution Approach 1:
The second electrode is positioned to create equipotential regions in areas with insufficient conductive material (non-touch areas and regions between pixel openings). This balances the electrical potential distribution across the display, improving display uniformity by compensating for uneven conductive material distribution.
Data Source
AI summary
Embodiments of the present disclosure provide a display panel and a display device. The display panel includes: a substrate; a pixel defining layer; an isolation structure disposed on the substrate, an orthographic projection of the isolation structure on the substrate being located outside an orthographic projection of the pixel opening on the substrate, and the isolation structure including a first isolation structure and a second isolation structure which are spaced apart and insulated from each other; and a functional layer including a first electrode, a touch electrode and a second electrode The touch electrode is configured to implement a touch function of the display panel, and the functional layer includes both the touch electrode and the first electrode. The functional layer also includes the second electrode, and by rationally positioning the touch electrode and the second electrode.