Optoelectronic Component Structured Layer Color Impression
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Solution Overview
Problem
Optoelectronic components, such as OLEDs, often exhibit an undesirable color impression when switched off due to the visibility of wavelength conversion layers and filter layers, which can differ from the operational color impression, affecting aesthetic appeal in applications like mobile phone flashlights and lighting devices.
Innovation Solution
An optoelectronic component design featuring a structured layer with alternating regions of wavelength conversion and filter layers, where the filter layer is impermeable to part of the second wavelength spectrum, ensuring that electromagnetic radiation from the wavelength conversion layer is superimposed with the first wavelength spectrum, resulting in a desired color impression, preferably non-yellowish, even in the switched-off state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a wavelength conversion layer is used to convert electromagnetic radiation from a first wavelength spectrum to a second wavelength spectrum, then the operational color impression is improved, but an undesired color impression occurs in the switched-off state
Solution Approach 1:
The optoelectronic component is divided into first regions containing wavelength conversion layers and second regions containing only filter layers. This segmentation allows different areas to serve different functions: first regions convert wavelength to improve operational color, while second regions provide filter coverage without conversion. When switched off, both regions contribute to blocking unwanted wavelengths, preventing the undesired color impression while maintaining operational performance.
Solution Approach 2:
Different regions of the optoelectronic component are assigned different local qualities: first regions have wavelength conversion capability while second regions have only filtering capability. This local differentiation allows the component to optimize operational color impression in first regions while using second regions to prevent undesired color appearance in switched-off state, as both regions contribute to wavelength management but with different functions.
2Object-generated harmful factors
If filter layers are made impermeable to part of the second wavelength spectrum, then the color impression when switched off is improved, but the structural complexity increases
Solution Approach 1:
The structured layer is segmented into first regions with wavelength conversion layers and second regions with filter layers. This segmentation simplifies the overall structure by allowing filter layers in second regions to focus solely on blocking unwanted wavelengths without the added complexity of wavelength conversion materials, while first regions handle conversion. The segmented approach reduces the complexity burden on individual layers.
Solution Approach 2:
The filter layers in second regions serve multiple functions: they block unwanted wavelengths when switched off and work in conjunction with wavelength conversion layers in first regions during operation. This multi-functionality reduces the need for separate dedicated filtering components, thereby reducing overall structural complexity while achieving the desired color impression control.
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 design effectively reduces the undesirable color impression in the switched-off state, maintaining a consistent and aesthetically pleasing appearance by ensuring the superimposition of electromagnetic radiation spectra, thereby providing a uniform and desired color impression.
Implementation Method 1
the first regions each have a wavelength conversion layer which is set up to at least partially convert electromagnetic radiation with the first wavelength spectrum into electromagnetic radiation with a second wavelength spectrum
Implementation Method 2
the second areas each have a filter layer that is at least partially impermeable to electromagnetic radiation with a third wavelength spectrum that corresponds to at least part of the second wavelength spectrum
Data Source
Figure 1A~1B
Figure 2~3
Figure 4A~4C
AI summary
An opto-electronic component comprises an organic layer sequence (1), which during operation emits electromagnetic radiation (15) having a first wavelength spectrum, and a structured layer (2), which is disposed after the organic layer sequence (1) in the beam path of the electromagnetic radiation (15) emitted by the organic layer sequence (1) and has first and second regions (2A, 2B). For this purpose, the first regions (2a) each have a wavelength conversion layer (3), which is equipped to convert at least some of the electromagnetic radiation (15) having the first wavelength spectrum into electromagnetic radiation (16) having a second wavelength spectrum. Furthermore, the second regions (2B) each have a filter layer (4), which is impervious to electromagnetic radiation having a third wavelength spectrum, which corresponds at least to some of the second wavelength spectrum.