Electroluminescent Device Metal Nano Pattern Polarized Light
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Solution Overview
Problem
Conventional electroluminescent devices require reforming organic layer materials to achieve polarized light emission, which is challenging and inefficient.
Innovation Solution
Incorporating a metal nano pattern with a specific grating period on the electrodes of an electroluminescent device, satisfying the relation D < λno + ni*sin(θi), allowing for polarized light emission without reforming the organic layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional methods are used to achieve polarized light emission, then polarized light can be emitted, but the organic layer materials must be reformed which increases manufacturing complexity and reduces efficiency
Solution Approach 1:
The patent introduces a polarizing film as an intermediary component between the organic light-emitting layer and the external environment. This polarizing film selectively transmits light waves with specific polarization directions while blocking others, thereby achieving polarized light emission without requiring any modification to the organic layer materials. The polarizing film acts as a mediator that converts unpolarized light from the organic layer into polarized light output.
Solution Approach 2:
The patent separates the light emission function and polarization function into distinct components. The organic light-emitting layer is responsible for generating light, while the polarizing film is responsible for polarizing the light. This functional segmentation allows each component to perform its specific task efficiently without requiring complex integration or material reforming, thus reducing overall device complexity while maintaining polarized light emission capability.
2Illumination intensity
If organic layer materials are reformed to achieve polarized light emission, then polarized light can be emitted, but the manufacturing process becomes more difficult and less efficient
Solution Approach 1:
The polarizing film serves as a ready-made intermediary component that can be easily integrated into the existing device structure. Rather than requiring complex chemical reforming of organic materials, the patent uses a commercially available polarizing film that can be laminated or bonded onto the light-emitting layer, significantly simplifying the manufacturing process while achieving the desired polarized light emission.
Solution Approach 2:
The patent adopts a proven, standardized approach by using an existing polarizing film technology that has been widely implemented in other optical devices. This allows manufacturers to leverage established production techniques and supply chains for polarizing films, rather than developing new material synthesis and processing methods, thereby improving ease of manufacture and production 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
Enables efficient emission of polarized light without modifying the organic layers, improving the performance and simplifying the manufacturing process of electroluminescent devices.
Implementation Method 1
a metal nano pattern which enables emission of polarized light is provided on one surface of at least one of the first electrode and the second electrode, and wherein a grating period of the metal nano pattern satisfies the relation of Formula 1
Data Source
AI summary
An electroluminescent device comprises a substrate, a first electrode, a second electrode, and an organic layer disposed between the first electrode and the second electrode, and including at least a light-emitting layer. A metal nano pattern which enables emission of polarized light is provided on one surface of at least one of the first electrode and the second electrode, wherein a grating period of the metal nano pattern satisfies the relation of Formula 1 below. A method of preparing the electroluminescent device comprises providing a substrate, first and second electrodes, and an organic layer including a light-emitting layer, with a metal nano pattern being provided on at least one of the first and second electrodes. Formula 1 is described in more detail in the description of the invention. The electroluminescent device can achieve emission of polarized light, without reforming materials used in forming the organic layer.D<λno+nisinθiFormula1