Hydrophobic Bonding Portion for OLED Display Panel Moisture Resistance
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Solution Overview
Problem
Conventional OLED display panels face challenges in maintaining thinness and lightness due to the need for a drying sheet to prevent moisture ingress, which increases thickness and limits the use of top-emission or bidirectional emission OLED devices.
Innovation Solution
A display panel design featuring a hydrophobic bonding portion outside the display region and a hydrophilic bonding portion between the hydrophobic and display regions, which bonds the substrates together, preventing moisture ingress without the need for a drying sheet, thereby maintaining panel thinness and allowing for various OLED emission types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drying sheet is added to prevent moisture ingress, then moisture resistance is improved, but panel thickness increases
Solution Approach 1:
The invention extracts and eliminates the drying sheet from the display panel structure by replacing it with a hydrophobic bonding portion that inherently prevents moisture ingress through its material properties, thereby maintaining thinness while achieving moisture resistance
Solution Approach 2:
The invention changes the chemical parameter of the bonding material by using hydrophobic materials with specific contact angles (≥90°) to prevent moisture adhesion, transforming the bonding portion into a moisture-resistant barrier without adding thickness
2Reliability
If a drying sheet is added to prevent moisture ingress, then moisture resistance is improved, but device complexity increases
Solution Approach 1:
The invention merges the moisture resistance function with the bonding function by integrating hydrophobic materials into the bonding portion, eliminating the need for a separate drying sheet and simplifying the overall structure
Solution Approach 2:
The bonding portion is designed to perform multiple functions simultaneously: structural bonding between substrates and moisture barrier protection, achieved through the dual properties of the hydrophobic bonding material
3Ease of manufacture
If conventional bonding materials are used, then ease of manufacture is maintained, but moisture resistance deteriorates
Solution Approach 1:
The invention uses composite materials comprising hydrophobic substances (such as fluorinated compounds, silicones, or waxes) integrated into the bonding portion, combining the bonding capability with inherent moisture repellency
Solution Approach 2:
The invention applies hydrophobic properties specifically to the bonding portion that is exposed to or susceptible to moisture, creating a localized moisture barrier where it is most needed while maintaining manufacturing simplicity
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 moisture resistance, eliminates the thickness increase from drying sheets, and enables the use of top-emission or bidirectional emission OLED devices, improving the display panel's structural integrity and emission efficiency.
Implementation Method 1
a hydrophobic bonding portion disposed between the display substrate and the opposite substrate. The hydrophobic bonding portion is configured to bond the display substrate and the opposite substrate together
Implementation Method 2
a hydrophilic bonding portion disposed between the display substrate and the opposite substrate. The hydrophilic bonding portion is configured to bond the display substrate and the opposite substrate together
Data Source
AI summary
A display panel includes a display substrate, an opposite substrate, and a hydrophobic bonding portion disposed between the display substrate and the opposite substrate. The hydrophobic bonding portion is configured to bond the display substrate and the opposite substrate together, and an orthographic projection of the hydrophobic bonding portion on the display substrate is located outside a display region of the display substrate.