Capacitive Touch Panel Shared Electrode Layout for Narrow Bezels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Capacitive touch panels face reduced touch sensitivity due to the saturation of bezels and decreased touch resolution caused by the arrangement of multiple electrostatic electrodes in a matrix form with numerous lead electrode wires.
Innovation Solution
The design includes a touch panel with X-axis and Y-axis lines connected by specific connection portions, varying in area and thickness of overlapping regions, reducing the number of lead wires and bezel size while maintaining resolution by identifying touch locations through capacitance differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple electrostatic electrodes are arranged in a matrix form with numerous lead electrode wires, then touch resolution is improved, but bezel size increases and touch sensitivity decreases
Solution Approach 1:
The patent merges multiple lead electrode wires into a single shared lead wire by connecting multiple electrostatic electrodes (e.g., first and second X-axis electrodes) to the same lead wire. This consolidation reduces the number of lead wires required, thereby decreasing bezel size while preserving the matrix arrangement of electrodes for maintaining touch resolution
Solution Approach 2:
The shared lead wire serves multiple functions by connecting to multiple electrostatic electrodes simultaneously. Instead of being dedicated to a single electrode, the lead wire becomes a universal connection path that enables signal transmission to multiple electrodes, reducing the overall number of lead wires needed in the system
2Measurement precision
If multiple electrostatic electrodes are arranged in a matrix form with numerous lead electrode wires, then touch resolution is improved, but touch sensitivity decreases
Solution Approach 1:
The patent merges multiple lead electrode wires into a single shared lead wire by connecting multiple electrostatic electrodes (e.g., first and second X-axis electrodes) to the same lead wire. This consolidation reduces the number of lead wires required, thereby decreasing bezel size while preserving the matrix arrangement of electrodes for maintaining touch resolution
Solution Approach 2:
The patent applies different area sizes to different overlapping regions (first area vs. second area) of the Y-axis electrode with X-axis electrodes. By varying the local quality (area) of different regions, the system can distinguish between different touch locations even when using shared lead wires, thereby maintaining touch sensitivity and resolution
3Reliability
If lead wires are connected to electrostatic electrodes one by one, then signal transmission is reliable, but device complexity increases
Solution Approach 1:
The patent merges multiple lead electrode wires into a single shared lead wire by connecting multiple electrostatic electrodes (e.g., first and second X-axis electrodes) to the same lead wire. This consolidation reduces the number of lead wires required, thereby decreasing bezel size while preserving the matrix arrangement of electrodes for maintaining touch resolution
Solution Approach 2:
The shared lead wire serves multiple functions by connecting to multiple electrostatic electrodes simultaneously. Instead of being dedicated to a single electrode, the lead wire becomes a universal connection path that enables signal transmission to multiple electrodes, reducing the overall number of lead wires needed in the system
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 configuration effectively reduces bezel size and maintains touch sensitivity by identifying touch locations through capacitance differences, enhancing the capacitive touch panel's performance.
Implementation Method 1
an insulating layer interposed between the X-axis lines and the Y-axis lines
Implementation Method 2
a Y-axis line crossing the first X-axis line and the second X-axis line has a first area in a region where the Y-axis line overlaps the first X-axis line and a second area in a region where the Y-axis line overlaps the second X-axis line. The first area and the second area are different from each other.
Data Source
AI summary
A touch panel is provided that includes: a substrate; a plurality of X-axis lines disposed on the substrate; a plurality of Y-axis lines crossing the plurality of X-axis lines; and an insulating layer interposed between the X-axis lines and the Y-axis lines, in which at least one first X-axis line and at least one second X-axis line selected from among the plurality of X-axis lines are connected by a first connection portion, and among the plurality of Y-axis lines, a Y-axis line crossing the first X-axis line and the second X-axis line has a first area in a region where the Y-axis line overlaps the first X-axis line and a second area in a region where the Y-axis line overlaps the second X-axis line, and the first area and the second area are different from each other.