Touch Display Panel Induction Electrode Lead Routing
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Solution Overview
Problem
In touch screen panels, the large number of single-side induction electrode leads increases the width of the bezel, making it difficult to improve the screen occupation ratio.
Innovation Solution
A touch display panel design with a first induction electrode lead in the touch screen structure and a second induction electrode lead in the thin film transistor device structure, where the first induction electrode lead is electrically connected with the second induction electrode lead, reducing the number of wires and minimizing the lower frame region size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a number of single-side induction electrode leads are used to connect the IC, then the connection reliability is improved, but the width of the lower bezel increases
Solution Approach 1:
The patent transitions from a single-layer planar arrangement of induction electrode leads to a multi-layer three-dimensional arrangement. The first induction electrode lead is positioned in the touch screen structure layer, while the second induction electrode lead is positioned in the thin film transistor device structure layer, utilizing the vertical dimension to reduce horizontal space occupation and thereby reduce the lower bezel width.
Solution Approach 2:
The patent implements a nested configuration where the first induction electrode lead in the upper layer is electrically connected to the second induction electrode lead in the lower layer through vertical connections. This nested multi-layer structure allows multiple connection paths to be compactly arranged, maintaining connection reliability while minimizing the horizontal footprint.
2Reliability
If multiple single-side induction electrode leads are arranged to connect the IC, then the electrical connection is ensured, but the screen occupation ratio decreases
Solution Approach 1:
The patent utilizes vertical layering to arrange induction electrode leads in different height levels (touch screen structure layer and thin film transistor device structure layer), converting horizontal space consumption into vertical space utilization. This dimensional transition preserves electrical connection functionality while reducing the area occupied on the screen plane, thereby improving screen occupation ratio.
Solution Approach 2:
The patent merges the functions of multiple induction electrode leads by electrically connecting the first induction electrode lead in the upper layer with the second induction electrode lead in the lower layer. This combination allows the leads to share connection paths and reduce redundant horizontal routing, minimizing the area required for electrical connections while ensuring reliable connectivity.
Data Source
AI summary
A touch display panel comprises a base substrate, a thin film transistor device structure, an organic light-emitting diode device structure, a packaging structure, and a touch screen structure that are sequentially arranged from bottom to top. The touch display panel further comprises a first induction electrode lead and a second induction electrode lead, wherein the first induction electrode lead is provided in the touch screen structure; the second induction electrode lead is provided in the thin film transistor device structure; and the first induction electrode lead is electrically connected to the second induction electrode lead.

