Display Panel Passivation Around Openings for Stretchable OLEDs
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Solution Overview
Problem
Curved display screens face issues with stretchability at bending regions, leading to potential wrinkles and damage to OLED devices due to moisture penetration through openings created to enhance stretchability.
Innovation Solution
A display panel design featuring a substrate with a thin film transistor structure, inorganic passivation layers, and an organic planarization layer, where the second inorganic passivation layer extends to cover exposed portions of the organic planarization layer near openings, preventing moisture and oxygen from entering the OLED device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display screen is punched at bending regions to enhance stretchability, then the stretchability is improved, but moisture can easily spread from the opening sidewall to the OLED device, causing failure
Solution Approach 1:
The patent applies preliminary anti-action by pre-coating the sidewall of the opening with a hydrophobic substance before moisture can penetrate. This preventive measure creates a barrier that repels moisture, counteracting the harmful effect of moisture penetration through the punched opening while maintaining the stretchability benefit
Solution Approach 2:
The hydrophobic coating acts as an intermediary substance between the opening sidewall and the OLED device. It mediates the interaction by creating a moisture-repelling barrier that prevents direct contact between moisture and the OLED device, thus protecting the device while allowing the structural opening to remain for stretchability
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 design enhances the stretchability of the display panel while protecting the OLED device from moisture and oxygen, thereby extending its service life and improving display quality.
Implementation Method 1
the second inorganic passivation layer extends toward the first inorganic passivation layer along a side of the organic planarization layer proximal to the at least one opening and covers an exposed portion of the organic planarization layer proximal to the at least one opening
Data Source
AI summary
The present disclosure provides a display panel and a display apparatus. The display panel includes at least one opening, and further includes: a substrate; a thin film transistor structure layer; a first inorganic passivation layer; an organic planarization layer on a side of the first inorganic passivation layer distal to the thin film transistor structure layer; and a second inorganic passivation layer on a side of the organic planarization layer distal to the first inorganic passivation layer. The second inorganic passivation layer extends toward the first inorganic passivation layer alone a side of the organic planarization layer proximal to the at least one opening and covers an exposed portion of the organic planarization layer on a side of the organic planarization layer proximal to the at least one opening.