Oblique Touch Wire Contact Groove for Narrow Frame Width
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Solution Overview
Problem
Current touch display panels face challenges in reducing the frame width, which is essential for achieving a narrow-frame design without compromising the electrical connection and contact performance between touch wires and leads.
Innovation Solution
The touch display panel incorporates a touch wire that extends obliquely with respect to the base substrate, forming a contact groove where it connects with a touch lead in different conductive layers, allowing for a reduced frame width while maintaining effective electrical contact through an inclined structure that enhances contact area and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the frame width is reduced to achieve narrow-frame design, then the aesthetic appearance and modernity are improved, but the electrical connection and contact performance between touch wires and leads deteriorate
Solution Approach 1:
The touch wire is designed to extend obliquely from the display area toward the peripheral area, transitioning from a planar horizontal layout to a three-dimensional inclined structure. This dimensional change allows the touch wire to reach the touch lead more efficiently within the reduced frame width space, maintaining electrical connection performance while achieving narrow-frame design
Solution Approach 2:
The touch wire is embedded within a contact groove structure that is formed in the peripheral area of the base substrate. This nesting arrangement allows the touch wire to be housed within the groove, optimizing space utilization and ensuring reliable contact with the touch lead while minimizing the overall frame width
2Ease of manufacture
If the touch wire extends horizontally in the peripheral area, then the manufacturing process is simple, but the frame width cannot be reduced effectively
Solution Approach 1:
The touch wire transitions from horizontal extension to oblique extension, utilizing the vertical dimension through the contact groove structure. This allows the frame width to be reduced while maintaining manufacturability, as the oblique extension can be achieved through standard semiconductor fabrication processes like inclined etching or multi-layer patterning
3Shape
If the touch wire extends obliquely to reduce frame width, then the narrow-frame design is achieved, but the manufacturing complexity increases
Solution Approach 1:
The touch wire is nested within a contact groove that is formed in the peripheral area of the base substrate. This nesting structure achieves the oblique extension effect while utilizing existing manufacturing capabilities for groove formation, thereby reducing the increase in manufacturing complexity compared to creating entirely new three-dimensional wire structures
Solution Approach 2:
The contact groove structure serves multiple functions: it provides the inclined path for the touch wire, houses the wire to optimize space, and facilitates contact with the touch lead. This multi-functionality reduces the need for additional separate structures, thereby limiting the increase in overall device complexity
Data Source
AI summary
A touch display panel includes: a base substrate, including a display area and a peripheral area on at least one side of the display area; pixel units in the display area, including a pixel driving circuit and a light-emitting element electrically connected to each other; touch electrodes in the display area; a touch wire electrically connected to at least one touch electrode, at least part of which extends to the peripheral area; a touch lead in the peripheral area, where the touch lead and the touch wire are in different conductive layers; and a contact groove in the peripheral area, where the touch wire and the touch lead are in contact in the contact groove, where the touch wire has a first touch wire portion in the contact groove, and the first touch wire portion extends obliquely with respect to an upper surface of the base substrate.