Adhesive-Free OLED Panel Stack for Thin High-Extraction Displays
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Solution Overview
Problem
Existing OLED display panels suffer from large overall thickness due to the inclusion of components like a polarizer and adhesive layers, which hinders lightness, thinness, and bendability.
Innovation Solution
The OLED display panel design eliminates adhesive layers between the encapsulation and protective layers, integrates a touch layer and filter layer without a polarizer, and uses a substrate layer formed by chemical vapor deposition, reducing thickness and enhancing light extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If adhesive layers and polarizer components are included in the OLED display panel, then structural integrity and optical functionality are maintained, but the overall thickness increases
Solution Approach 1:
The patent removes the polarizer and adhesive layers from the traditional OLED display panel structure. By extracting these components, the overall thickness is reduced while the essential structural integrity and optical functionality are maintained through alternative design approaches in the remaining layers.
Solution Approach 2:
The patent integrates multiple functions into fewer layers. The encapsulation layer and protective layer are designed to work together as a unified structure that provides both protection and optical functionality, eliminating the need for separate polarizer and adhesive layers while maintaining structural integrity.
2Reliability
If adhesive layers are used to connect components, then structural stability is ensured, but light extraction rate decreases
Solution Approach 1:
The patent extracts and removes the adhesive layers that traditionally connect components. This elimination prevents the adhesive layers from blocking light extraction paths, thereby improving the light extraction rate while structural stability is maintained through direct bonding interfaces between the encapsulation and protective layers.
3Adaptability or versatility
If multiple separate layers (encapsulation, touch, filter, protective) are stacked, then functional requirements are met, but manufacturing complexity increases
Solution Approach 1:
The patent combines the encapsulation, touch, filter, and protective layers into a more integrated structure. By merging these functions into a streamlined multi-layer system without adhesive intermediaries, the design meets all functional requirements while reducing manufacturing complexity and improving light extraction efficiency.
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 significantly reduces the panel's thickness and improves light extraction rate, contributing to a lighter and more flexible display.
Implementation Method 1
a first substrate layer and a first barrier layer formed by chemical vapor deposition
Implementation Method 2
An OLED display panel is a self-luminous display device that uses an organic thin film as a light-emitting element
Data Source
AI summary
The present application provides an OLED display panel, which includes: a substrate layer, an array layer, a light-emitting functional layer, an encapsulation layer, a touch layer, a filter layer, and a protective layer, wherein the filter layer includes a black matrix layer and a color filter layer. There is no adhesive layer between the touch layer and the filter layer and between the filter layer and the protective layer. The OLED display panel according to the present application can realize lightness and thinness of the display panel and increase light extraction rate.