Display Pad Area Segmentation for Moisture Corrosion Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses face limitations in improving electrical characteristics due to the vulnerability of pad units to external moisture, which can lead to corrosion and moisture ingress, affecting the display area.
Innovation Solution
A display apparatus design featuring a pad area with blocking areas and a corrosion preventer, where the pad area includes a connection area connected to a driving circuit, an exposed area, and blocking areas between them, with a flexible printed circuit (FPC) bent towards a second substrate, and a printed circuit board (PCB) connected to the FPC, ensuring the top surface of the exposed area is not covered by the FPC and the PCB does not cross the edge of the substrate, thereby minimizing width and preventing moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pad unit is located at an edge of the display apparatus to enable signal transmission, then the electrical signal transmission function is achieved, but the pad unit becomes vulnerable to moisture damage and corrosion
Solution Approach 1:
The pad area is segmented into multiple functional zones: a connection area for electrical signals, an exposed area for moisture venting, and blocking areas with corrosion preventers for protection. This segmentation allows each zone to perform its specific function optimally while collectively solving the moisture exposure problem.
Solution Approach 2:
A corrosion preventer is introduced as an intermediary substance in the blocking areas between the connection area and the exposed area. This corrosion preventer acts as a protective barrier that blocks moisture migration paths while allowing the pad unit to maintain its electrical signal transmission function.
2Object-generated harmful factors
If the pad unit serves as a path for moisture entry, then moisture can be vented from the display area, but corrosion occurs at the connection area
Solution Approach 1:
Different areas of the pad unit are given different properties: the exposed area has direct moisture access for venting, while the connection area is protected by blocking areas containing corrosion preventers. This local differentiation allows moisture venting functionality while protecting the electrical connection area from corrosion.
3Reliability
If the FPC is bent toward the second substrate to connect the driving circuit, then electrical connection is achieved, but the connection area becomes more exposed to moisture
Solution Approach 1:
The pad area is divided into a connection area and blocking areas, with the blocking areas positioned to specifically protect the FPC connection region from moisture while maintaining electrical connectivity.
Solution Approach 2:
Corrosion preventers are placed in the blocking areas adjacent to the connection area, creating a protective barrier that shields the FPC connection from moisture exposure while allowing electrical signals to pass through.
Data Source
AI summary
A display apparatus for improving corrosion resistance of a pad area and a method of manufacturing the same. The display apparatus includes a first substrate including a display area, a non-display area, and a pad area, and a second substrate facing the first substrate and corresponding to at least the display area, wherein the pad area includes, a connection area connected to a driving circuit; an exposed area spaced from the connection area; and a plurality of blocking areas between the connection area and the exposed area.