Flexible Display Panel Conductive Line Design
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Solution Overview
Problem
Conventional flexible display panels suffer from metal wiring deformation, rupture, or structural changes when bent, leading to reduced signal carrying function or malfunction due to unrelieved stress.
Innovation Solution
A flexible display panel design featuring a continuous first conductive line with lower rigidity and a broken second conductive line with higher conductivity, where the second conductive line comprises spaced conductive line sections electrically connected to the first conductive line, and covered by a passivation layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal wirings are used in the bending region, then conductivity is improved, but stress concentration causes cracks and rupture reducing reliability
Solution Approach 1:
The patent changes the physical parameters of the conductive line by creating a composite structure with alternating high-conductivity metal sections and low-conductivity flexible sections. This parameter change allows the wiring to maintain adequate conductivity while the flexible sections can deform during bending without cracking, thus improving reliability without sacrificing strength.
Solution Approach 2:
The patent uses composite materials by combining different conductive line sections with contrasting properties - high-conductivity metal sections for electrical performance and flexible low-conductivity sections for mechanical durability. This composite approach resolves the contradiction between needing high conductivity and high stress resistance in the bending region.
2Reliability
If continuous metal conductive line is used, then conductivity is improved, but flexibility during bending is reduced
Solution Approach 1:
The patent segments the continuous conductive line into alternating sections of high-conductivity material and flexible low-conductivity material. This segmentation allows different parts of the same conductive line to serve different functions - signal transmission and mechanical flexibility - thereby resolving the contradiction between conductivity and bending adaptability.
Solution Approach 2:
The patent applies local quality by giving different sections of the conductive line different properties - high-conductivity sections for optimal signal transmission and flexible low-conductivity sections for bending adaptability. This localized differentiation allows the conductive line as a whole to achieve both good conductivity and bending flexibility.
Data Source
AI summary
The present application provides a flexible display panel including: an underlay substrate; at least one first conductive line being continuous line-shaped, disposed on the underlay substrate; at least one second conductive line being broken line-shaped, corresponding to the first conductive line, and disposed on the first conductive line, wherein each of the second conductive line includes a plurality of conductive line sections, the conductive line sections are spaced from one another, and is electrically connected to a corresponding one of the first conductive line. A rigidity of the first conductive line is less than a rigidity of the conductive line sections, and a conductivity of the conductive line sections is greater than a conductivity of the first conductive line. The configuration of the first conductive line and the second conductive line makes the flexible display panel have both rigidity and conductivity.