OLED Component with Adjustable Transmittance for Light Detection
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Solution Overview
Problem
Conventional organic light emitting diodes (OLEDs) face challenges in automatically adjusting their emission spectrum to match changing light conditions, leading to inefficient energy use and incorrect lighting due to the need for manual adjustments and complex circuitry with multiple photosensors.
Innovation Solution
An optoelectronic component with a single photosensor that includes an optically active structure and an electro-optical structure with adjustable transmittance, allowing for precise automatic readjustment of electromagnetic radiation, reducing circuit complexity and space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If multiple photosensors are integrated for simultaneous detection of internal and external brightness, then the detection capability is improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent segments the detection function by using a single photosensor that alternates between detecting internal brightness (when the electro-optical structure blocks external light) and external brightness (when the electro-optical structure allows external light through). This temporal segmentation replaces spatial segmentation with multiple simultaneous sensors, reducing device complexity while maintaining detection capability.
Solution Approach 2:
The patent employs a dynamic electro-optical structure (such as an electrically switchable mirror or diaphragm) that can change its optical properties in real-time. By dynamically switching between blocking and transmitting external light, the system enables a single photosensor to perform multiple detection functions sequentially, thereby reducing the number of components needed.
2Reliability
If manual dimming or external sensors with electronic circuit are used to keep luminance constant, then the luminance control is improved, but the device complexity and additional costs increase
Solution Approach 1:
The patent merges the luminance control function with the detection function by integrating a photosensor and an electro-optical structure directly into the OLED device. This combined approach eliminates the need for separate external sensors and control circuits, thereby maintaining reliable luminance control while reducing device complexity and additional costs.
Solution Approach 2:
The OLED device performs its own luminance monitoring and adjustment by using an integrated photosensor to detect brightness levels and an electro-optical structure to modulate light output. This self-service capability eliminates the need for external control systems, reducing both device complexity and cost while maintaining reliable luminance control.
3Device complexity
If a single photosensor is used with an electro-optical structure for adjustable transmittance, then the device complexity is reduced, but the ability to independently detect internal and external light must be achieved through alternative means
Solution Approach 1:
The patent uses periodic switching of the electro-optical structure to alternately block and transmit external light to the photosensor. By implementing a periodic detection cycle where the sensor measures external brightness during transmission phases and internal brightness during blocking phases, the system achieves independent detection capability with a single sensor, thereby reducing device complexity.
Solution Approach 2:
The patent implements a feedback mechanism where the photosensor continuously monitors both internal and external brightness levels, and this information is used to control the electro-optical structure's transmittance. The feedback loop enables the system to independently regulate the detection of internal and external light, maintaining detection capability while using only a single photosensor.
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 exact automatic readjustment of optoelectronic properties, reducing circuit complexity and space requirements, allowing for independent detection of internal and external light, and optimizing energy use by adapting to changing light conditions.
Implementation Method 1
the electro-optical structure is formed with regard to the optically active structure in such a way that the proportion of the second electromagnetic radiation impinging on the optically active structure is adjustable
Implementation Method 2
the optically active structure is formed for taking up an electromagnetic radiation in such a way that the optically active structure generates a measurement signal from the electromagnetic radiation taken up
Data Source
AI summary
Various embodiments may relate to an optoelectronic component, including an optoelectronic structure, which is designed to provide a first electromagnetic radiation, and a measuring structure, which is designed to measure electromagnetic radiation, wherein the measuring structure has an optically active structure and at least one electro-optical structure. The optically active structure is optically coupled to the optoelectronic structure. The optically active structure is designed to absorb an electromagnetic radiation in such a way that the optically active structure produces a measured signal from the absorbed electromagnetic radiation. The absorbed electromagnetic radiation at least partially includes the first electromagnetic radiation and/or at least one second electromagnetic radiation of an external radiation source. The electro-optical structure is designed in such a way that the electro-optical structure has an adjustable transmittance, such that the fraction of the second electromagnetic radiation incident on the optically active structure can be adjusted.