OLED Circular Polarizer Thickness Reduction via Layer Integration
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Solution Overview
Problem
Existing OLED touch displays face challenges in reducing thickness while effectively eliminating external light interference, as conventional circular polarizers increase overall thickness due to the need for additional substrates and glass cover plates.
Innovation Solution
The implementation of a structure that combines a phase difference plate and a linear polarizer to form a circular polarizer, with the touch layer integrated into the circular polarizer, eliminating the need for a separate touch screen substrate and using a water-oxygen barrier layer instead of a glass cover plate to reduce thickness and enhance protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional circular polarizer is used to eliminate external light interference, then the ability to block external light is improved, but the overall thickness increases due to additional substrates and glass cover plates
Solution Approach 1:
The patent combines the touch layer and circular polarizer into a single integrated structure, eliminating the need for separate substrates and glass cover plates. The touch layer serves dual functions as both the touch sensing element and the structural support, while the circular polarizer is directly formed on the touch layer, reducing overall thickness while maintaining external light blocking capability
Solution Approach 2:
The touch layer is designed to perform multiple functions simultaneously: it serves as the touch sensing layer, the structural substrate for the circular polarizer, and part of the protective structure. This multi-functionality eliminates the need for separate dedicated components, thereby reducing thickness without compromising performance
2Reliability
If a separate touch screen substrate and glass cover plate are used, then protection and touch functionality are improved, but thickness and weight increase
Solution Approach 1:
The patent merges the touch screen substrate function into the touch layer itself, which is already required for touch functionality. The circular polarizer is directly formed on this integrated structure, eliminating the need for separate glass cover plates and substrates, thereby maintaining protection and touch functionality while reducing thickness
Solution Approach 2:
The patent employs thin-film structures for the circular polarizer and touch layer integration, replacing traditional thick glass cover plates and substrates. This use of thin films maintains the necessary protective and functional properties while significantly reducing overall display thickness
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 solution effectively reduces the thickness of OLED touch displays by integrating the touch layer into the circular polarizer and using a thinner water-oxygen barrier layer, while maintaining the ability to block external light interference, thus supporting a lightweight and thin design.
Implementation Method 1
a phase difference plate, a touch layer and a linear polarizer sequentially disposed on a light-emitting side of the OLED display, in which the linear polarizer and the phase difference plate are combined to form a circular polarizer
Implementation Method 2
forming a phase difference plate on the water-oxygen barrier layer
Data Source
AI summary
An organic light-emitting diode (OLED) touch display device and a manufacturing method thereof are provided. The OLED touch display device includes an OLED display; and a phase difference plate, a touch layer and a linear polarizer sequentially disposed on a light-emitting side of the OLED display, in which the linear polarizer and the phase difference plate are combined to form a circular polarizer.