Transparent Oxide-Metal-Oxide Wiring Bridge for Zero-Bezel Displays
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Solution Overview
Problem
The visibility of wiring in the vertex region of zero-bezel smartphones is a problem due to the overlapping of wiring into the display area when the vertex region is cut off to accommodate the zero-bezel structure.
Innovation Solution
The use of a transparent or translucent wiring bridge made of an Oxide-Metal-Oxide laminate, which connects the first and second metal wirings in a curved base portion, minimizing the length and visibility of the wiring bridge while maintaining low electrical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the vertex region is cut off to accommodate the zero-bezel structure, then the display area can extend to the edge region, but the wiring portion moves inward to the display area and becomes visually recognized
Solution Approach 1:
The patent applies the color changes principle by transitioning the wiring material from opaque metal to transparent or translucent material. This allows the wiring to become invisible or minimally visible in the display area while maintaining its electrical connection function, thereby resolving the contradiction between extending display area and preventing wiring visibility.
Solution Approach 2:
The patent employs composite materials by using a transparent conductive material that combines optical transparency with electrical conductivity. This composite material property enables the wiring to fulfill both requirements: being invisible in the display area while maintaining proper electrical connection functionality.
2Object-generated harmful factors
If transparent or translucent material is used for the wiring bridge, then wiring visibility is minimized, but electrical resistance may increase
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness and composition of the transparent conductive material layers. By carefully controlling these parameters, the wiring bridge achieves a balance between transparency (reducing visibility) and electrical conductivity (maintaining low resistance), thus resolving the contradiction between minimizing visibility and maintaining electrical performance.
Data Source
AI summary
A touch sensor includes a base layer and a wiring formed in a display area among a vertex region of the base layer and made of a transparent or translucent material at least partially.