Touch Panel Electrode Optimization for Signal and Durability
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Solution Overview
Problem
Current embedded capacitive touch panels face challenges in durability and maintenance costs due to insufficient induction signals when using thick glass as a cover lens, and they struggle to withstand large external forces effectively.
Innovation Solution
The touch panel design incorporates a substrate with first and second electrode series, where the area ratio of the second electrodes to the first electrodes ranges from 0.37 to 0.41, and uses thick glass as a cover lens, along with metal meshes and imaginary-part electrodes to enhance signal quality and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick glass is used as a cover lens to protect the touch panel from external forces, then the durability and resistance to external forces are improved, but the induction signal becomes insufficient
Solution Approach 1:
The patent changes the geometric parameters of the electrodes by optimizing the area ratio between the first electrode and the second electrode. Specifically, the area of the second electrode is designed to be 0.37 to 0.41 times the area of the first electrode, which optimizes the capacitive coupling and induction signal generation while maintaining the thick glass cover lens structure for durability.
2Reliability
If the area of the second electrode is reduced to maintain a specific ratio relationship with the first electrode, then the inductive effect is improved, but the electrode complexity increases
Solution Approach 1:
The patent optimizes the area ratio parameter between the first and second electrodes to a specific range (0.37 to 0.41), which balances the inductive effect with the structural simplicity. This parameter optimization allows achieving good inductive performance without requiring complex electrode patterns or additional components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design allows the touch panel to withstand significant external forces while maintaining excellent inductive effects and reducing maintenance costs, with improved signal quality and visual appearance.
Implementation Method 1
a capacitive touch panel is classified into an out-cell capacitive touch panel and an embedded capacitive touch panel... a sensing electrode is made on a substrate... the embedded capacitive touch panel is combined with a display panel during manufacturing of the display panel
Implementation Method 2
thick glass (for example, glass having a thickness of more than 3 mm) as a cover lens... the thick cover lens in the disclosure can protect the touch panel, when an external force is applied to the touch panel, it is relatively not easy for the touch panel to be broken
Data Source
AI summary
A touch panel includes a substrate, a plurality of first electrode series, and a plurality of second electrode series. The substrate has a first surface. The first electrode series are disposed on the first surface. Each of the first electrode series extends along a first direction and includes a plurality of first electrodes. The second electrode series are disposed on the first surface. Each of the second electrode series extends along a second direction and includes a plurality of second electrodes.