3D Touch Panel with Integrated Electrodes and Insulation
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Solution Overview
Problem
Conventional touch panels with pressure sensor electrodes require additional layers, making them thicker and less lightweight, which hinders their integration in thin and lightweight structures, and also leads to interference between touch-sensing and pressure-sensing performance.
Innovation Solution
Integrally disposing touch sensor electrodes and pressure sensor electrodes on the same plane of a substrate, with insulation structures ensuring electrical insulation and shared manufacturing processes to reduce thickness and enhance accuracy and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure sensor electrodes are disposed on a separate layer above or under the touch sensor electrodes, then touch sensing and pressure sensing functions are achieved, but the overall thickness of the touch panel increases
Solution Approach 1:
The patent merges the pressure sensor electrodes and touch sensor electrodes onto the same substrate plane, eliminating the need for separate layers. The pressure sensor electrodes are formed as conductive patterns on the substrate, with insulation structures positioned between adjacent pressure sensor electrodes and between pressure sensor electrodes and touch sensor electrodes, achieving both sensing functions within a single layered structure.
Solution Approach 2:
The patent implements a nested configuration where insulation structures are positioned between pressure sensor electrodes and touch sensor electrodes on the same plane. The insulation structures include conductive patterns with insulating materials filling gaps, creating a nested arrangement that allows multiple functional elements to coexist without increasing overall thickness.
2Length of stationary object
If pressure sensor electrodes and touch sensor electrodes are disposed on the same plane, then the overall thickness is reduced, but interference between touch-sensing performance and pressure-sensing performance may occur
Solution Approach 1:
The patent applies local quality by using insulation structures with specific electrical properties positioned between pressure sensor electrodes and touch sensor electrodes. These insulation structures include conductive patterns with insulating materials that provide localized electrical isolation, allowing the electrodes to be on the same plane without interfering with each other's sensing functions.
Solution Approach 2:
The patent introduces insulation structures as intermediary elements between pressure sensor electrodes and touch sensor electrodes. These insulation structures act as mediators that prevent electrical interference while allowing the electrodes to coexist on the same plane, ensuring both touch sensing and pressure sensing operations function accurately without cross-interference.
3Reliability
If separate manufacturing processes are used for pressure sensor electrodes and touch sensor electrodes, then each electrode type can be optimized, but production efficiency and manufacturing complexity increase
Solution Approach 1:
The patent employs a universal manufacturing process where the same conductive material and deposition techniques are used for both pressure sensor electrodes and touch sensor electrodes. The insulation structures are formed using the same insulating material and patterning processes, allowing a single manufacturing workflow to produce both electrode types, thereby improving production efficiency while maintaining optimized performance for each function.
Data Source
AI summary
A touch panel includes a substrate, a first touch sensor electrode, a first insulation structure, a second touch sensor electrode, and a first pressure sensor electrode. The first touch sensor electrode is disposed on the substrate and extends along a first direction. The first insulation structure is dispose on the substrate and covers a part of the first touch sensor electrode. The second touch sensor electrode is disposed on the substrate and extends along a second direction. The second touch sensor electrode crosses over the first insulation structure and electrically isolated from the first touch-sensitive electrode. The first pressure sensor electrode is disposed on the substrate and extends along a third direction. The first pressure sensor electrode crosses over the first insulation structure and is staggered with at least one of the first touch. sensor electrode and the second touch sensor electrode.