Touch Substrate Wiring for Frame-Free Display Design
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Solution Overview
Problem
Existing touch screen technologies, such as OGS and on cell touch screens, face challenges in implementing a frame-free design due to the need for wires to pass through side frames, which obstructs the achievement of a true frame-free touch panel and display.
Innovation Solution
A touch substrate design with a touch region and a wiring region positioned outside the touch region, featuring first and second touch electrodes extending along intersecting directions, and a first wire electrically connected to these electrodes, which extends directly to the wiring region without passing through the side frame, accompanied by an insulating layer to manage wire placement and reduce impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wires are arranged to pass through side frames for electrical connection, then electrical connectivity is achieved, but frame-free design cannot be implemented
Solution Approach 1:
The patent transitions wire routing from a two-dimensional plane (passing through side frames) to a three-dimensional structure (extending through the touch region and insulating layer to reach the wiring region). This dimensional change allows wires to connect electrodes to wiring regions without obstructing the display area, enabling frame-free design while maintaining electrical connectivity.
Solution Approach 2:
The insulating layer serves as an intermediary structure that facilitates wire routing. By positioning wires on one side of the insulating layer while electrodes are on the other side, the patent creates a controlled pathway for electrical connection that does not require side frame obstruction, thus enabling frame-free design.
2Shape
If wires extend through the touch region to wiring regions, then frame-free design is achieved, but wire placement complexity increases
Solution Approach 1:
The insulating layer is formed beforehand to establish predetermined routing paths for wires. This preliminary structure guides wire placement through the touch region to wiring regions, simplifying the overall wire routing process while maintaining frame-free design.
Solution Approach 2:
The insulating layer is strategically positioned only where needed to manage wire placement, allowing wires to extend through the touch region to wiring regions without requiring complex routing throughout the entire device. This localized approach reduces overall wire placement complexity.
Data Source
AI summary
A touch substrate and a manufacturing method thereof, and a display device are provided. The touch substrate includes: a first touch electrode, a second touch electrode, and a first wire; the first touch electrode extending from a first side edge of a touch region to a second side edge thereof; the second touch electrode extending from a third side edge of the touch region to a fourth side edge thereof; the first wire extending within the touch region after being electrically connected to either the first touch electrode or the second touch electrode, and extending from the fourth side edge to a wiring region located at the fourth side edge.