OLED Linear Polarizer and Quarter-Wave Layer Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light-emitting devices (OLEDs) face reduced contrast due to light reflection in bright environments, and conventional circular polarizers increase thickness and reduce brightness due to adhesive layers and multiple film components.
Innovation Solution
A thin film-type organic light-emitting device is designed with a linear polarization layer and a 1/4 wavelength layer directly on the substrate, forming a circular polarizer without an adhesive, minimizing external light reflection and maintaining brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circular polarizer is used to improve contrast, then light reflection is reduced, but device thickness increases due to multiple film layers and adhesive
Solution Approach 1:
The patent combines the linear polarization layer and 1/4 wavelength layer into a single integrated circular polarizer component that is directly formed on the substrate, eliminating the need for separate film layers and adhesive. This merging approach maintains the contrast improvement function while significantly reducing device thickness.
Solution Approach 2:
The patent extracts and eliminates the adhesive layer from the conventional circular polarizer structure. By directly forming the linear polarization layer and 1/4 wavelength layer on the substrate without adhesive, the invention removes the thickness-contributing element while preserving the polarizing function.
2Object-affected harmful factors
If multiple film layers are used to form a circular polarizer, then polarization function is achieved, but brightness is reduced due to light transmission through multiple interfaces
Solution Approach 1:
By merging the linear polarization layer and 1/4 wavelength layer into a directly-formed integrated structure, the patent reduces the number of interfaces through which light must pass. This minimizes light loss at interfaces and maintains higher brightness while achieving the desired polarization effect for contrast improvement.
3Ease of manufacture
If adhesive layers are used to attach polarization films, then assembly is simplified, but device complexity increases due to additional materials and processing steps
Solution Approach 1:
The patent extracts and removes the adhesive layer from the manufacturing process. By directly forming the polarization layers on the substrate using deposition techniques, the invention simplifies the overall structure and reduces the number of materials and processing steps required, despite the advanced deposition technology needed.
4Length of stationary object
If a thin film-type circular polarizer is formed, then device thickness is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent replaces the mechanical assembly approach (attaching separate films with adhesive) with a direct deposition process where the linear polarization layer and 1/4 wavelength layer are formed directly on the substrate. This substitution enables precise thickness control through deposition parameters while eliminating the alignment and bonding precision issues associated with mechanical assembly.
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 enhances contrast by reducing light reflection and maintains brightness by eliminating the need for adhesive layers and multiple films, resulting in a thinner and more efficient OLED structure.
Implementation Method 1
a linear polarization layer which may be on one surface of the substrate, the thin film transistor, the organic light-emitting element, the sealing member, or the 1/4 wavelength layer
Implementation Method 2
a 1/4 wavelength layer which may be on one surface of the substrate, the thin film transistor, the organic light-emitting element, or the sealing member
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
An organic light-emitting device, including a substrate (1), an organic light-emitting element (3) on the substrate (1), a sealing member on the organic light-emitting element (3), a 1/4 wavelength layer (21) on one surface of the substrate (1), the organic light-emitting element (3), or the sealing member, and a linear polarization layer (22) on one surface of the substrate (1), the organic light-emitting element (3), the sealing member, or the 1/4 wavelength layer (21), the linear polarization layer (22) being closer to an image display surface than the 1/4 wavelength layer (21).