Transparent Touch Panel Bezel with Inductive Electrodes
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Solution Overview
Problem
Conventional touch panels have an opaque bezel region without touch functionality due to the use of thick, opaque conductive silver paste for signal transmission, leading to wasted space and inefficiency.
Innovation Solution
A touch panel design incorporating an inductive electrode with intersecting first and second electrode axes, including touch and signal electrodes made of low resistance materials, allowing for transparent and touch-enabled bezels by using the same material for both electrode and wire regions, and a flexible circuit board to calculate touch positions accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick conductive silver paste is used for signal transmission in the bezel region, then conductivity is improved, but transparency is worsened and touch functionality is lost
Solution Approach 1:
The patent changes the material parameters by using transparent conductive materials with low resistance (≤20Ω/□) instead of traditional thick opaque silver paste. This parameter change enables the bezel region to maintain both conductivity and transparency, allowing touch functionality in previously non-touchable areas.
Solution Approach 2:
The patent employs composite material structures including transparent conductive layers, insulating blocks, and flexible substrates. The combination of these materials creates a bezel region that achieves both electrical conductivity and optical transparency, resolving the contradiction between these two properties.
2Illumination intensity
If the same material is used for both electrode and wire regions, then transparency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies universality by using the same transparent conductive material for both electrode and wire regions, allowing a single material type to serve multiple functions. This reduces the number of different materials needed and simplifies the overall manufacturing process despite the increased functional requirements.
Solution Approach 2:
The patent implements local quality by using insulating blocks at specific intersection points where electrode axes cross, while the rest of the wire and electrode regions use transparent conductive material. This localized differentiation maintains transparency where needed while providing electrical isolation where required.
3Measurement precision
If touch electrodes and signal electrodes are arranged at intervals with multiple touch electrodes between signal electrodes, then touch sensitivity is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the electrode system into distinct touch electrodes and signal electrodes arranged at intervals. This segmentation allows for improved touch sensitivity through multiple touch electrodes between signal electrodes while maintaining an organized, manageable structure that doesn't excessively increase complexity.
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
Enables a transparent and functional bezel region with improved touch sensitivity and accuracy, utilizing the same material for both signal and touch electrodes to maintain transparency and conductivity, enhancing the overall efficiency of the touch panel.
Implementation Method 1
When a user performs a touch input operation on the touch panel, a capacitance is formed between the inductive electrode and a finger of the user
Data Source
AI summary
The present disclosure discloses a touch panel, including an inductive electrode and a flexible circuit board, the inductive electrode including a first electrode axis and a second electrode axis intersecting each other, and the first electrode axis and the second electrode axis each including a plurality of touch electrodes and a plurality of signal electrodes; signal wires connected to the touch electrodes; and touch wires connected to the signal electrodes; the touch electrodes and the signal electrodes being arranged at intervals, and at least one touch electrode being arranged between two signal electrodes. With the technical solution, the present disclosure achieves a touch panel with a transparent and touch-enabled bezel.