OLED Packaging Structure with Corner Margin Blocking Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OLED display device packaging technologies face challenges with film uniformity and equipment requirements, particularly due to sensitivity to air and humidity, and the inefficiency of current inorganic water blocking layers in maintaining stability and life expectancy.
Innovation Solution
A packaging structure for OLED devices incorporating a first blocking layer with a margin portion, a first and second water blocking layer, and an organic planarization layer deposited using inkjet printing, which allows for improved film uniformity and reduced manufacturing equipment needs by adjusting the slope shapes and widths at corner and edge positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-layer film stack TFE structure is used, then water blocking function is provided, but film uniformity is poor and high requirements for manufacturing equipment are needed
Solution Approach 1:
The blocking layer is designed with different local characteristics: the first blocking layer has a margin portion at the corner position with different dimensions compared to the edge position, creating local quality variations that improve film uniformity while maintaining the overall water blocking function
Solution Approach 2:
The first blocking layer with margin portion is formed in advance before depositing the subsequent water blocking layers, establishing a preliminary structure that guides and improves the uniformity of following film deposition processes
2Ease of manufacture
If traditional TFE structure without margin portion is used, then manufacturing process is simpler, but film uniformity at corner positions is poor
Solution Approach 1:
The blocking layer incorporates a margin portion specifically at corner positions with different dimensions than edge positions, creating local quality variations that address the uniformity problem at corners without significantly complicating the overall manufacturing process
3Reliability
If inorganic water blocking layers are used, then water blocking performance is improved, but device stability and life expectancy are insufficient
Solution Approach 1:
The packaging structure uses a composite design combining organic blocking layer material with multiple inorganic water blocking layers, creating a composite barrier system that provides both immediate water blocking performance and long-term device stability and longevity
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
The solution enhances film uniformity and reduces manufacturing costs while maintaining the stability and life expectancy of OLED devices, achieving a film uniformity coefficient of 95% and improved packaging performance with less equipment investment.
Implementation Method 1
an organic planarization layer deposited using inkjet printing
Data Source
AI summary
The present disclosure relates to a packaging structure of an OLED device, a display device, and a packaging method of an OLED device. The packaging structure of an OLED device comprises: a substrate, an OLED device on the substrate, a first layer on the OLED device, wherein, the packaging structure of the OLED device further comprises a first blocking layer positioned outside the first layer for defining the first layer, and wherein the first blocking layer has a margin portion in its corner position.