Display Substrate Power-Line Layout Against Moisture Ingress
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The risk of moisture and oxygen ingress through power lines entering the encapsulation region of a display substrate, leading to erosion and potential failure of the auxiliary connection structure, which compromises the electrical connection and display performance.
Innovation Solution
A display substrate design featuring a blocking structure surrounding pixel units, an auxiliary connection structure with a first organic pattern covering part of its side surface, and a cathode layer connected through this structure, ensuring the organic pattern is spaced apart from the blocking structure to prevent moisture and oxygen ingress, while maintaining effective power signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power lines enter the encapsulation region from the bonding region close to the pixel units, then power signal transmission is achieved, but moisture and oxygen ingress risk increases
Solution Approach 1:
The power line is divided into multiple segments: a first portion outside the encapsulation region, a second portion inside the encapsulation region, and an auxiliary connection structure for transition. This segmentation allows the power line to enter the encapsulation region at a distance from the pixel units while maintaining electrical connection, thereby reducing moisture and oxygen ingress risk at the line inlet port.
Solution Approach 2:
An auxiliary connection structure is introduced as an intermediary component between the first portion and the second portion of the power line. This auxiliary connection structure includes a first side surface and a second side surface, and it is covered by an organic pattern that extends from the second portion to the first portion, providing a protective bridge that prevents moisture and oxygen ingress while maintaining electrical connectivity.
2Ease of manufacture
If the power line enters close to the pixel units, then connection to the cathode layer is facilitated, but the encapsulation performance deteriorates
Solution Approach 1:
The organic pattern is extended from the second portion of the power line to the first portion in a direction that provides spatial separation from the pixel units. This dimensional extension allows the organic pattern to cover the auxiliary connection structure effectively, maintaining encapsulation performance while facilitating connection to the cathode layer through the extended organic pathway.
3Reliability
If the organic pattern covers the auxiliary connection structure, then protection against erosion is improved, but the risk of moisture introduction through the organic pattern increases
Solution Approach 1:
The organic pattern is selectively positioned to cover the auxiliary connection structure at critical locations where erosion protection is most needed, while maintaining a specific spatial relationship with the blocking structure. The organic pattern covers the first side surface and second side surface of the auxiliary connection structure, but its projection is configured to prevent direct contact with the blocking structure, thereby providing localized protection without creating moisture ingress pathways.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present disclosure discloses a display substrate and a display apparatus, and relates to the field of display technologies. The display substrate includes a base substrate, a plurality of pixel units, at least one first power line, a blocking structure, an auxiliary connection structure, a cathode layer and a first organic pattern. By covering at least part of the second side surface of the auxiliary connection structure with the first organic pattern, the risk of the second side surface of the auxiliary connection structure being eroded by moisture or oxygen due to the etching defects can be reduced, thereby guaranteeing that the auxiliary connection structure can effectively transmit power signals from the first power line. Moreover, as the first organic pattern is spaced apart from the blocking structure, the moisture brought in by the end of the first power line for receiving power signals can be prevented from being introduced into the pixel units through the blocking structure and the first organic pattern, thereby guaranteeing the yield of the display substrate, as well as the display effect of the display substrate.