OLED Display Barrier Structure for Corner Wrinkle Prevention
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Solution Overview
Problem
The challenge in OLED display panels is the increased thickness of film layers at corners due to bending, which can lead to wrinkles and delamination, reducing yield and display quality.
Innovation Solution
A display panel design with a first barrier structure in the peripheral area, featuring a combination of side and corner barriers with varying dimensions and connections, and a second barrier structure to prevent material overflow, along with a planarization layer and encapsulation layers to enhance structural integrity and prevent wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If film layers are bent at corners to achieve full-screen display, then screen-to-body ratio is improved, but film layer thickness increases causing wrinkles and delamination
Solution Approach 1:
The barrier structure is divided into multiple segments (first barriers and second barriers) arranged in arrays along the bending lines. These segmented barriers are distributed at different positions to provide localized support against wrinkling without requiring a continuous thick barrier structure throughout the entire corner region.
Solution Approach 2:
The barrier structure provides localized reinforcement specifically at corner regions where bending occurs, rather than uniformly increasing barrier thickness across the entire display. The first and second barriers are positioned at specific locations along the bending lines to address wrinkling susceptibility only where needed.
2Stability of the object's composition
If barrier structure dimensions are increased to prevent wrinkles, then film layer stability is improved, but device complexity increases
Solution Approach 1:
The barrier structure is divided into multiple segments (first barriers and second barriers) arranged in arrays along the bending lines. These segmented barriers are distributed at different positions to provide localized support against wrinkling without requiring a continuous thick barrier structure throughout the entire corner region.
Solution Approach 2:
Instead of providing excessive barrier thickness uniformly across all regions, the invention applies barrier structures partially only at specific locations where wrinkling is most likely to occur (along the bending lines at corners). This partial action provides sufficient protection while avoiding unnecessary complexity in regions where wrinkling is less likely.
Data Source
AI summary
A display panel has a display area and a peripheral area including side peripheral areas and corner peripheral areas. The display panel includes a first barrier structure. The first barrier structure is in the peripheral area and at least partially surrounds the display area. The first barrier structure includes a first portion and a second portion. The first portion is in a side peripheral area and including M first barriers, M≥2. The second portion is a corner peripheral area and including N second barriers, N≥1. M>N. A first dimension of the first portion is greater than a second dimension of the second portion, the first dimension is a dimension of the first portion in a direction perpendicular to its extending direction, and the second dimension is a dimension of the second portion in a direction perpendicular to its extending direction.