Organic Optoelectronic Component Substrate Light Feedback Loop
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Solution Overview
Problem
Organic optoelectronic components, such as OLEDs, face challenges in maintaining constant light intensity and color locus over their lifetime, requiring continuous brightness and color adjustments to ensure consistent performance.
Innovation Solution
Integration of an organic light detecting element, such as an organic photodiode, on the same substrate as the light emitting element, which measures light intensity and color, allowing for real-time adjustments to maintain constant brightness and color by guiding light through the substrate and using a drive device to regulate the light emitting element based on detected signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If an organic light emitting element is used to generate light, then light emission function is achieved, but the intensity and color locus cannot be kept constant over the lifetime
Solution Approach 1:
An organic light detecting element is integrated on the substrate to detect the light emitted by the organic light emitting element. The detected light intensity and color information are fed back to a control unit, which adjusts the driving current to the light emitting element in real-time, compensating for degradation and maintaining constant intensity and color locus throughout the component's lifetime.
Solution Approach 2:
The organic light detecting element serves the dual purpose of being both a functional component (detecting light for regulation) and a monitoring element for the light emitting element's performance. The system self-regulates by using its own emitted light as the detection target, eliminating the need for external reference light sources or additional shielding structures.
2Measurement precision
If additional light shielding measures are implemented to protect from ambient light, then measurement precision improves, but device complexity increases
Solution Approach 1:
The light detecting element is integrated directly on the same substrate as the light emitting element, merging the emission and detection functions into a single compact structure. This integration eliminates the need for separate light shielding structures, as the close proximity allows the detector to primarily sense the emitted light while ambient light interference is minimized through the regulation algorithm that compares detected light against expected emission characteristics.
Solution Approach 2:
The system uses its own emitted light as the detection target, creating a self-referential measurement system. The control unit regulates the light emitting element based on light that the detecting element itself detects from the emitting element, eliminating the need for external reference sources or complex shielding arrangements.
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 solution ensures minimal influence from ambient light and allows for precise regulation of light emission, maintaining consistent brightness and color locus over the component's lifetime without additional light shielding measures, enhancing the reliability and performance of organic optoelectronic components.
Implementation Method 1
The organic light emitting element comprises at least one organic light emitting layer arranged between at least two electrodes
Implementation Method 2
The organic light detecting element comprises at least one organic light detecting layer which can be arranged between two electrodes
Implementation Method 3
The substrate is formed with a radiation-transmissive material... at least 80% of the light entering the substrate at a main surface and radiating through the substrate leaves the substrate at an opposite main surface
Data Source
AI summary
An organic optoelectronic component includes a substrate embodied in a light-transmissive fashion, an organic light-emitting element having an organic light-emitting layer between two electrodes, and an organic light-detecting element having an organic light-detecting layer. The organic light-emitting element and the organic light-detecting element are arranged on the substrate. Part of the light generated by the organic light-emitting element during operation enters into the substrate, emerges from the substrate and is detected by the organic light-detecting element.