Display Edge Wiring Segmentation for Insulation Breakdown Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in display apparatus manufacturing is the formation of defective pixels at the edge of the display area, which affects image quality due to insulation breakdown caused by accumulated electric charges during the manufacturing process.
Innovation Solution
The solution involves designing a display apparatus with strategically positioned bridge wiring and signal lines, where the first wiring is formed with a longer length but its end is spaced apart from the display area, and additional bridge wiring connects it to a shorter additional wiring, distributing electric charges to prevent insulation breakdown. This design includes thin film transistors with specific electrode configurations and materials, ensuring that electric charges are evenly distributed across layers to avoid strong electromagnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wiring is extended closer to the display area to improve signal connection, then electrical connectivity is improved, but electric charges accumulate causing insulation breakdown and pixel defects
Solution Approach 1:
The patent introduces an additional bridge wiring as an intermediary element that provides an alternative electrical connection path. This additional wiring is positioned farther from the display area than the first bridge wiring, allowing electric charges to be distributed through multiple pathways rather than accumulating in a single location, thereby preventing insulation breakdown while maintaining electrical connectivity.
Solution Approach 2:
The patent divides the bridge wiring function into multiple separate wiring structures (first bridge wiring and additional bridge wiring) positioned at different locations. This segmentation distributes the electrical connection function across multiple elements, preventing charge accumulation at any single point and reducing the risk of insulation breakdown near the display area.
2Reliability
If bridge wiring is positioned closer to the display area to reduce resistance, then electrical performance is improved, but the risk of pixel defects increases due to charge accumulation
Solution Approach 1:
The bridge wiring is segmented into multiple structures (first bridge wiring and additional bridge wiring) positioned at different distances from the display area. This segmentation allows the system to achieve good electrical performance through the first bridge wiring while the additional bridge wiring positioned farther away provides charge distribution to prevent pixel defects.
Solution Approach 2:
The patent changes the spatial parameter (positioning) of the bridge wirings to create different functional zones. The first bridge wiring is positioned closer to the display area for optimal electrical performance, while the additional bridge wiring is positioned farther away to provide charge distribution, thereby optimizing both electrical performance and pixel defect prevention.
3Manufacturing precision
If additional bridge wiring is added to distribute electric charges, then pixel defect rate is reduced, but device complexity increases
Solution Approach 1:
The additional bridge wiring acts as an intermediary structure that simplifies the overall system reliability by providing a dedicated charge distribution function. While it adds one more wiring element, it prevents complex pixel defect issues and potential manufacturing failures, thereby reducing overall system complexity in terms of reliability management.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A display apparatus is provided that includes a substrate having a display area and a peripheral area located outside the display area. A first part of an edge of the display area has a round shape and the peripheral area includes a pad area. The display apparatus further includes a first wiring extending in a direction toward the first part from the pad area, and having a first discontinuous point at which the first wiring is physically discontinuous; and a first bridge wiring allowing the first wiring to be electrically continuous at the first discontinuous point.