OLED Substrate Recessed Hole for Hardware Installation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible OLED display devices are prone to a significant reduction in lifespan due to water vapor and oxygen ingress through installation holes, as the packaging film breaks, leaving the OLED unprotected.
Innovation Solution
An organic electroluminescent display substrate is designed with a recessed portion that includes a first and second opening, where the second opening is smaller than the first, allowing a redundant layer to block water and oxygen, and a packing film covers the substrate to prevent ingress, with a through hole formed using laser drilling that extends through the redundant layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an installation hole is formed in the display region to accommodate hardware components, then hardware installation is enabled, but the packaging film breaks and water vapor and oxygen ingress, causing serious shortening of product life
Solution Approach 1:
The installation hole is divided into two parts: a first hole portion passing through the substrate and a second hole portion extending into the packaging film. The packaging film is segmented into a first region covering the organic electroluminescent component and a second region covering the first electrode, allowing the hole to pass through without breaking the protective packaging structure.
Solution Approach 2:
The second hole portion is nested within the second region of the packaging film, creating a hierarchical structure where the hole passes through the substrate first, then extends into the packaging film region, allowing hardware installation while maintaining packaging integrity.
2Reliability
If the packaging film is made continuous to protect the OLED, then protection against water vapor and oxygen is improved, but hardware installation becomes impossible
Solution Approach 1:
The packaging film is designed with different properties in different regions: the first region has high protective quality covering the organic electroluminescent component, while the second region allows the hole to pass through for hardware installation. This local differentiation enables both protection and adaptability.
3Ease of manufacture
If a through hole is formed directly through the packaging film, then hardware installation is simplified, but water vapor and oxygen easily enter the OLED, causing serious shortening of product life
Solution Approach 1:
The hole structure is segmented into a first hole portion and a second hole portion, with the packaging film also segmented into protective regions. This segmentation allows the hole to pass through without compromising the protective function of the packaging film in critical areas.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively extends the lifespan of the OLED by preventing water and oxygen from reaching the light-emitting area, while allowing hardware installation, such as cameras or receivers, without compromising the packaging film integrity.
Implementation Method 1
a through hole is formed that extends through the whole organic electroluminescent display substrate in a region where the recessed portion is located
Data Source
Figure 1~3
Figure 4
Figure 4
AI summary
The present disclosure provides an organic electroluminescent display substrate including: a substrate; a display region; a transitional region; a packing film that extends from the display region to the transitional region and a through hole. The display region includes an insulating layer on the substrate and an organic electroluminescent component on the insulating layer. The transitional region includes: a recessed portion extending through the insulating layer and a redundant layer on the substrate and in the recessed portion. An opening size of one side of at least one part of the recessed portion away from the substrate is not greater than an opening size of another side of the at least one part of the recessed portion adjacent the substrate. The redundant layer and at least one layer of the organic electroluminescent component are made of the same material, and the redundant layer is disconnected with the organic electroluminescent component. The packing film covers the organic electroluminescent component and at least one part of the recessed portion. The through hole extends through the packing film, the redundant layer and the substrate in a region where the recessed portion is located.