OLED Display Buffer Layer Impact Stress Protection
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Solution Overview
Problem
OLED display screens face issues with structural integrity during impact tests, leading to damage such as dark spots and colored spots due to the crushing of the support layer, which affects the screen's strength and longevity.
Innovation Solution
A display screen design featuring a buffer layer on the end surfaces of the support layer, composed of organic glue or fibers, which disperses impact stress and protects the support pillars from damage, thereby enhancing the screen's durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a support layer is used in OLED display screens, then the screen structure is maintained, but the support layer is crushed during impact tests causing dark spots and colored spots
Solution Approach 1:
A buffer layer is introduced between the support layer and the pixel defining layer to absorb impact stress before it reaches the support layer. The buffer layer comprises a buffer region with different mechanical properties that cushions the support layer during impact tests, preventing crushing and resulting dark spots or colored spots on the display screen.
Solution Approach 2:
The patent uses composite material structure by combining the support layer (first material) with the buffer layer (second material having different mechanical properties). This composite structure allows the buffer layer to absorb impact energy while the support layer maintains its structural function, resolving the contradiction between support strength and impact reliability.
2Strength
If the support layer is made stronger to prevent crushing, then structural integrity is improved, but the screen becomes more complex
Solution Approach 1:
The support structure is segmented into distinct functional layers: the support layer for structural maintenance and the buffer layer for impact absorption. This segmentation allows each layer to be optimized for its specific function without requiring the support layer to handle both structural and impact absorption demands, thus maintaining simplicity while improving strength.
Solution Approach 2:
The buffer layer acts as an intermediary between the support layer and external impact forces. It mediates the stress transmission, protecting the support layer from direct impact while maintaining the overall structural integrity. This intermediary approach avoids the need to overly strengthen the support layer itself, keeping the device complexity manageable.
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 buffer layer effectively reduces the occurrence of damage like dark and colored spots, improving the overall strength and extending the service life of the OLED display screen by absorbing impact stress.
Implementation Method 1
the buffer layer is elastic
Data Source
AI summary
The present disclosure discloses a display screen, which includes an array layer, a planarization layer, a pixel defining layer, a support layer, and a buffer layer. The planarization layer is located on a surface of the array layer. The pixel defining layer is located on a surface of the planarization layer away from the array layer, and the support layer is located on a surface of the pixel defining layer away from the planarization layer. The buffer layer is located on at least one of an end surface of the support layer away from the pixel defining layer and an end surface of the support layer adjacent to the pixel defining layer.