Organic-light emitting diode
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Solution Overview
Problem
Existing organic light-emitting diodes (OLEDs) lack versatility in emission profiles and environmental protection, failing to efficiently emit directional radiation and being susceptible to environmental influences.
Innovation Solution
The development of an OLED with a structured radiation exit area and encapsulation, featuring a radiation-emitting region that generates electromagnetic radiation from infrared to UV, and a seal against environmental influences, allowing for diverse applications such as transparent, colored, or directional lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing OLEDs are used without structured radiation exit area, then manufacturing is simpler, but directional emission capability is poor
Solution Approach 1:
The radiation exit area is segmented into multiple regions with different orientations of the second charge carrier transport layer, creating distinct emission zones that emit radiation in different directions. This segmentation allows the device to achieve directional emission while maintaining a relatively simple overall structure.
Solution Approach 2:
Different regions of the radiation exit area are given different local properties through varying the orientation of the charge carrier transport layer. This local quality variation enables each region to emit radiation preferentially in a specific direction, achieving overall directional emission control without complex external optics.
2Reliability
If existing OLEDs lack encapsulation, then device structure is simpler, but reliability against environmental influences is poor
Solution Approach 1:
The encapsulation function is extracted as a separate, dedicated component rather than being integrated into the active layers. This allows the organic layer sequence to be fully protected from environmental influences while maintaining clear functional separation and simplifying the overall device architecture.
Solution Approach 2:
The encapsulation is implemented as a composite structure with a first encapsulation layer and a second encapsulation layer, providing multi-layer protection against environmental influences such as moisture and oxygen, thereby enhancing reliability without excessive complexity.
3Adaptability or versatility
If OLED emits broad spectrum radiation, then application versatility is improved, but emission control in specific directions is difficult
Solution Approach 1:
The radiation exit area is divided into multiple segments, each with charge carrier transport layers oriented at different angles. This segmentation enables the broad spectrum radiation to be emitted in multiple directions simultaneously, allowing the single device to serve multiple applications with different directional requirements.
Solution Approach 2:
The OLED is designed with multi-functional capability through the segmented radiation exit area, allowing it to provide directional emission control across the broad spectrum. This enables the device to adapt to various applications such as display, lighting, and sensing without requiring multiple separate devices.
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 OLED achieves directional emission profiles and enhanced durability, enabling applications in various lighting scenarios, including alarm clocks, shower cubicles, solar protection, and general lighting, while maintaining transparency and color versatility.
Implementation Method 1
The organic light-emitting diode generates electromagnetic radiation in the spectral range from infrared radiation to UV radiation during operation
Data Source
AI summary
A device comprising an organic light-emitting diode comprising an organic layer sequence, a radiation exit area and an encapsulation, wherein the organic layer sequence comprises at least one radiation-emitting region which generates electromagnetic radiation in the spectral range from infrared radiation to UV radiation during operation, and wherein the encapsulation forms a seal of the organic layer sequence against environmental influences, at least one touch-sensitive operating element, wherein the at least one touch-sensitive operating element comprises at least one touch sensor, wherein the device is flexible.