OLED Pixel Adsorption Layer With Convex Surface for Light Extraction
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Solution Overview
Problem
Organic light-emitting diode (OLED) display devices face issues with material degradation due to water and oxygen exposure, leading to reduced light-emitting efficiency and lifetime, and total internal reflection affects the display panel's performance.
Innovation Solution
A display panel design featuring a light emitting layer with a pixel definition structure and water and oxygen adsorption layer, where the adsorption layer includes convex parts made of materials like polyacrylate or polyvinyl alcohol, which are strategically placed to adsorb and lock water and oxygen, and a convex surface configuration to enhance light penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If organic light-emitting materials are used in OLED display devices, then light emission is achieved through electroluminescence, but the materials are easily eroded by water and oxygen, reducing light-emitting lifetime
Solution Approach 1:
A water and oxygen adsorption layer is introduced as an intermediary between the organic light-emitting materials and the external environment. This layer selectively adsorbs water and oxygen molecules, preventing them from reaching and eroding the organic materials, thereby protecting the light-emitting layer while maintaining its electroluminescence function
Solution Approach 2:
The adsorption layer creates a protected, inert environment around the organic light-emitting materials by capturing water and oxygen molecules. This effectively isolates the sensitive organic materials from harmful environmental factors, extending their operational lifetime without affecting light emission performance
2Illumination intensity
If total internal reflection occurs in the display panel, then light is trapped within the panel structure, but light-emitting efficiency is decreased
Solution Approach 1:
The adsorption layer is designed with a convex spherical surface instead of a flat surface. This curvature causes incident light rays to reflect at different angles, preventing total internal reflection and enabling more light to escape from the display panel, thereby improving light-emitting efficiency and reducing energy loss
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 increases the display panel's lifetime and light-emitting efficiency by preventing material erosion and optimizing light transmission through the use of a convex water and oxygen adsorption layer.
Implementation Method 1
a water and oxygen adsorption layer comprising a plurality of water and oxygen adsorption parts, wherein the water and oxygen adsorption parts are disposed on the pixel definition structure
Implementation Method 2
total internal reflection that occurs in a display panel leads to a decreased light-emitting efficiency
Data Source
AI summary
The present application provides a display panel and a manufacturing method thereof. The display panel includes an array substrate, a light emitting layer, and a water and oxygen adsorption layer. The light emitting layer is disposed on the array substrate. The light emitting layer includes a pixel definition structure and a plurality of light emitting parts, the pixel definition structure includes a plurality of grooves, and the light emitting parts are disposed in the grooves. The water and oxygen adsorption layer includes a plurality of water and oxygen adsorption parts, the water and oxygen adsorption parts are disposed on the pixel definition structure, and a surface of the water and oxygen adsorption parts is convex.