Display Apparatus Barrier Pattern for Moisture Ingress Control
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Solution Overview
Problem
The penetration of external moisture and oxygen through through-holes in display devices can damage light-emitting elements, leading to defects such as dark spots and decreased luminance, which affects the reliability and power consumption of display apparatuses.
Innovation Solution
A display apparatus with a barrier pattern comprising an outer and inner barrier pattern with an undercut structure is implemented to block or delay the penetration of moisture and oxygen, featuring a dam pattern between the through-hole and display area, and an outer and inner barrier pattern to disconnect and delay the diffusion of moisture/oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a through-hole is defined within the display area to place electronic components, then the bezel area is reduced and display area increases, but external moisture or oxygen can penetrate into the display area through the through-hole
Solution Approach 1:
The barrier pattern is divided into multiple segments including an outer barrier pattern, inner barrier pattern, and dam pattern. These segmented structures work together to block moisture penetration paths while allowing the through-hole to remain open for electronic components, thus resolving the contradiction between maintaining display area and preventing moisture ingress.
Solution Approach 2:
The barrier pattern acts as an intermediary structure between the through-hole and the display area. It intercepts and blocks moisture diffusion paths without obstructing the through-hole opening, enabling both moisture protection and component placement functionality to coexist.
2Area of stationary object
If the bezel area is reduced to improve user immersion, then the display area increases, but the protection against moisture penetration becomes more challenging
Solution Approach 1:
The barrier pattern extends in multiple dimensions including lateral extension beyond the through-hole boundary and vertical layering with outer and inner barrier patterns at different positions. This multi-dimensional configuration provides comprehensive moisture protection while maintaining a minimal bezel design.
Solution Approach 2:
The barrier pattern is strategically positioned and configured with varying properties in different locations. The outer barrier pattern extends laterally to block external moisture, while the inner barrier pattern provides additional protection closer to the display area, creating localized protection zones that enhance overall reliability without increasing bezel size.
3Object-affected harmful factors
If a barrier pattern is added to block moisture penetration through the through-hole, then moisture protection improves, but the device complexity increases
Solution Approach 1:
Multiple barrier functions are merged into a single integrated barrier pattern structure that includes the outer barrier pattern, inner barrier pattern, and dam pattern. This unified structure provides comprehensive moisture protection through multiple mechanisms simultaneously while avoiding the need for separate independent barrier components, thus reducing overall structural complexity.
Solution Approach 2:
The barrier pattern serves multiple functions simultaneously: it blocks external moisture penetration, delays moisture diffusion time, and protects the display area without obstructing the through-hole. This multi-functionality reduces the need for additional separate protective structures, thereby minimizing device complexity while achieving robust moisture protection.
Data Source
AI summary
Disclosed is a display apparatus including a display area located on a substrate and including a plurality of light-emitting elements, a through-hole area located within the display area, wherein a through-hole extending through the substrate is located in the through-hole area, and a hole boundary area located between the through-hole area and the display area, wherein the display apparatus includes a dam pattern located on the hole boundary area between the through-hole and the display area, an outer barrier pattern disposed between the through-hole and the dam pattern, and an inner barrier pattern disposed between the dam pattern and the display area, wherein the inner barrier pattern has a trench groove including a bottom surface and a sidewall surrounding the bottom surface.