Touch Apparatus Conductive Pattern Design for Narrow Line Region
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Solution Overview
Problem
The increasing resolution of display panels leads to a larger number of connection lines, which affects the visual effect by widening the line region and making it difficult to reduce the width, especially when a touch electrode needs to be connected across a transparent window, compromising the display panel's aesthetic appeal.
Innovation Solution
A touch apparatus design featuring a substrate with a transparent window, pixel structures, and conductive patterns, including a main and dummy portion of conductive patterns, where the dummy portion is electrically connected to the third touch electrode and structurally separated from the main portion, allowing for efficient electrical connection without increasing the line region width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the display panel is increased, then the display quality is improved, but the number of connection lines increases causing the line region width to increase
Solution Approach 1:
The conductive pattern is folded back underneath the transparent window, transitioning from a planar lateral arrangement to a three-dimensional vertical arrangement. This dimensional change allows the connection path to be accommodated within the narrow line region without increasing its width, while still providing sufficient electrical connection length for high-resolution displays.
Solution Approach 2:
The conductive pattern is divided into multiple segments: a first portion extending from the touch electrode to the transparent window, and a second portion folded back underneath the window. This segmentation allows each portion to perform its function efficiently while maintaining a compact overall structure that fits within the constrained line region.
2Adaptability or versatility
If a touch electrode is disposed in the display panel, then touch functionality is added, but the conductive pattern must bypass the transparent window increasing line region width
Solution Approach 1:
The conductive pattern is nested underneath the transparent window, with the second portion positioned below the window rather than extending laterally around it. This nesting arrangement allows the conductive pattern to bypass the transparent window while occupying vertical space rather than lateral space, maintaining a narrow line region width while enabling touch electrode connectivity.
3Reliability
If connection lines are arranged around the transparent window, then electrical connection is enabled, but the visual effect is compromised due to increased line region width
Solution Approach 1:
The conductive pattern is extracted from the lateral arrangement around the transparent window and repositioned to extend underneath it. This extraction removes the visual obstruction from the front view, allowing the connection lines to perform their electrical function while remaining hidden from the user's perspective, thus preserving the display's visual effect.
Data Source
AI summary
A touch apparatus includes a substrate, a plurality of pixel structures, a first touch electrode, a second touch electrode, a third touch electrode and a first conductive pattern. The first touch electrode and the second touch electrode are located at a first side of a transparent window. The third touch electrode is located at a second side of the transparent window. The first touch electrode, the second touch electrode and the third touch electrode are sequentially arranged in a first direction. A main portion of the first conductive pattern is electrically connected to the first touch electrode. The main portion of the first conductive pattern overlaps with the second touch electrode and is electrically isolated from the second touch electrode. A dummy portion of the first conductive pattern is electrically connected to the third touch electrode and structurally separated from the main portion of the first conductive pattern.