Elliptical Polarizing Plate for Wide-Angle OLED Antireflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current circularly polarizing plates exhibit strong viewing angle dependence, leading to deteriorated antireflection performance and reduced visibility in organic light-emitting devices due to reflected external light.
Innovation Solution
An elliptically polarizing plate is designed with a specific configuration of linear polarizer and retardation films, including a +B or +C plate, -B plate, and quarter-wave phase retardation characteristics, to control optical properties and minimize reflection and color differences across viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circularly polarizing plate is attached to reduce leakage of reflected external light, then antireflection performance is improved, but viewing angle dependence causes antireflection performance to deteriorate toward the side, lowering visibility
Solution Approach 1:
The polarizing plate is divided into multiple functional layers: a linear polarizer layer and multiple retardation films (first, second, third, and fourth retardation films) with different optical characteristics. Each layer performs a specific function in controlling polarized light, allowing the plate to achieve both antireflection performance and reduced viewing angle dependence through coordinated action of segmented components.
Solution Approach 2:
The polarizing plate uses a composite structure combining different types of retardation films (positive and negative birefringent films) with a linear polarizer. This composite material approach allows the plate to exhibit elliptical polarization characteristics that maintain antireflection performance across different viewing angles, resolving the contradiction between antireflection effectiveness and visibility.
2Object-affected harmful factors
If a circularly polarizing plate is used to prevent light leakage, then reflection characteristics are improved, but color characteristics deteriorate toward the side due to strong viewing angle dependence
Solution Approach 1:
The polarizing plate is divided into multiple functional layers: a linear polarizer layer and multiple retardation films (first, second, third, and fourth retardation films) with different optical characteristics. Each layer performs a specific function in controlling polarized light, allowing the plate to achieve both antireflection performance and reduced viewing angle dependence through coordinated action of segmented components.
Solution Approach 2:
Different regions of the polarizing plate (front and side viewing angles) are optimized through the specific arrangement of retardation films with different birefringent characteristics. The first and second retardation films compensate for viewing angle dependence in specific regions, ensuring consistent color characteristics across different viewing directions while maintaining antireflection performance.
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 elliptically polarizing plate achieves superior visibility and reflection characteristics on both the front and side, effectively preventing external light reflection and improving display quality in organic light-emitting devices.
Implementation Method 1
the polarizer can transmit light that vibrates in any one direction from incident light that vibrates in various directions, and absorb light that vibrates in the other directions
Implementation Method 2
a first retardation film (10), a second retardation film (20), a third retardation film (30) and a fourth retardation film (40)
Data Source
AI summary
Provided is an elliptically polarizing plate and an organic light-emitting device. The elliptically polarizing plate of the present application can provide an elliptically polarizing plate with superior visibility having excellent reflection characteristics and color characteristics on the side as well as the front, and an organic light-emitting device comprising the same.