Stacked Connection Lines Prevent Lifting in Bendable Display Contact Areas
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Solution Overview
Problem
Bending of display devices can cause lifting or separation between electronic devices and conductive lines, leading to signal disruption and failure in image display.
Innovation Solution
A display device design with a substrate featuring a display area, bending area, and contact area, including specific connection lines and insulation layers, where the first gate connection line, first source connection line, and second source connection line overlap in the contact area, and a blocking line is used to prevent impurities and reduce electrical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is bent to enable flexibility and portability, then adaptability is improved, but lifting occurs between electronic devices and conductive lines causing signal transmission failure
Solution Approach 1:
The conductive lines are divided into multiple segments (first gate connection line, first source connection line, second source connection line, blocking line) stacked in different layers. This segmentation allows each line to be independently positioned and connected, preventing lifting between electronic devices and conductive lines during bending while maintaining signal transmission reliability.
Solution Approach 2:
The patent transitions from planar connection to three-dimensional stacked connection by arranging conductive lines in multiple layers (different dimensions). The first gate connection line, first source connection line, second source connection line, and blocking line are positioned at different vertical levels, creating a multi-layer connection structure that prevents lifting during bending operations.
2Reliability
If multiple connection lines are stacked to prevent lifting, then reliability is improved, but device complexity increases
Solution Approach 1:
The multi-layer structure serves multiple functions simultaneously: the first gate connection line transmits gate signals, the first and second source connection lines transmit source signals, and the blocking line prevents impurity penetration. By integrating these different functions into a single stacked structure, the patent achieves reliable connections without proportionally increasing overall device complexity.
Solution Approach 2:
Multiple connection lines that would traditionally be arranged separately in the planar direction are merged into a compact stacked structure in the vertical direction. This combining approach reduces the horizontal space required while maintaining connection stability, effectively managing device complexity through vertical integration.
Data Source
AI summary
A display device includes a display area, a bending area, and a contact area between the display area and the bending area, a first gate connection line, in the contact area and extended toward the display area, a first source connection line on the first gate connection line and electrically connected to the first gate connection line, in the contact area, a second source connection line on the first source connection line and electrically connected to the first source connection line, in the contact area, and a blocking line on the second source connection line and electrically connected to the second source connection line, in the contact area.