Touch Panel Wiring Uniformity via Redundant Segments
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Solution Overview
Problem
Existing display devices with touch components face issues of non-uniform wiring in the non-display area, leading to charge accumulation on dummy electrodes that can affect the service life of touch electrodes and signal transmission.
Innovation Solution
A display panel design featuring touch electrodes in the display area and touch leads in the non-display area, with redundant winding segments that extend away from the circuit board to fill gaps between the cutting track and display area, improving wiring uniformity and reducing electrostatic discharge effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If touch leads extend directly from touch electrodes towards the circuit board, then connection simplicity is improved, but wiring uniformity in the non-display area deteriorates
Solution Approach 1:
The touch lead is segmented into multiple sections: a first section extending from the touch electrode, a second section forming a redundant winding segment, and a third section connecting to the circuit board. This segmentation allows each section to serve a specific function - the first and third sections maintain simple connections while the second section fills the gap between cutting tracks to achieve uniform wiring distribution across the non-display area.
2Manufacturing precision
If dummy electric blocks are arranged in the non-display area to improve wiring uniformity, then wiring uniformity is improved, but charge accumulation and service life deteriorate
Solution Approach 1:
The invention extracts and eliminates the dummy electric block from the design by incorporating the gap-filling function directly into the touch lead structure through the redundant winding segment. This removes the source of charge accumulation while maintaining wiring uniformity, thereby improving reliability and service life.
Solution Approach 2:
The redundant winding segment serves multiple functions simultaneously: it fills the gap between cutting tracks to achieve uniform wiring distribution, provides a discharge path for static electricity, and eliminates the need for separate dummy electric blocks. This multi-functionality resolves the contradiction between wiring uniformity and service life.
3Manufacturing precision
If redundant winding segments are added to fill gaps between cutting tracks, then wiring uniformity is improved, but device complexity increases
Solution Approach 1:
The redundant winding segment is merged with the touch lead structure rather than being a separate component. The touch lead integrates the gap-filling function directly into its path from the touch electrode to the circuit board, combining multiple functions (connection and gap filling) into a single continuous structure, thereby minimizing the increase in device complexity.
Data Source
AI summary
The embodiments of the present application provide a display panel and a display device. The display panel has a display area and a non-display area, the display panel includes: a substrate, a touch component arranged on the substrate, the touch component comprising touch electrodes located in the display area and touch leads connected to the touch electrodes and located in the non-display area; and a circuit board connected to the substrate in the non-display area, the touch leads being connected between the touch electrodes and the circuit board; and wherein the non-display area has a cutting track arranged surrounding at least part of the display area, at least part of the touch leads includes first redundant winding segments and connection segments, at least part of the first redundant winding segments extend along a direction away from the circuit board and fill between the cutting track and the display area.