OLED Device with Fluid-Driven Optical Tuning
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Solution Overview
Problem
Existing organic light-emitting diode (OLED) devices lack versatility and efficiency in adjusting optical properties, limiting their applications due to fixed configurations and complex architectures required for color tunability.
Innovation Solution
An OLED device with a design that includes a first and second hollow space connected by a fluid connection, where an optically functional fluid is moved between them by a control element, allowing adjustable optical properties through the use of immiscible solvents, scattering particles, and conversion materials, and a resilient optically functional layer with variable thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed configurations are used in OLED devices, then manufacturing is simpler, but optical properties cannot be adjusted
Solution Approach 1:
The patent implements a dynamic optical system where the optical properties of the OLED device can be adjusted in real-time. This is achieved through a tunable optical element (such as a liquid crystal layer or variable refractive index material) that can change its optical characteristics under external control (electric field, voltage, or mechanical actuation), allowing the device to transition between different optical states without physical reconfiguration.
Solution Approach 2:
The invention utilizes parameter changes in optical materials to achieve adjustable optical properties. By changing parameters such as refractive index, absorption coefficient, or phase state of optical materials (e.g., using liquid crystals that change orientation with voltage), the device can modulate light transmission, reflection, or emission characteristics dynamically, providing versatility without complex mechanical structures.
2Adaptability or versatility
If complex architectures are used for color tunability, then optical properties can be adjusted, but device complexity increases
Solution Approach 1:
The patent employs a universal optical control mechanism that can achieve multiple optical functions (color tuning, brightness modulation, contrast adjustment) through a single integrated system. Rather than using separate components for each function, the invention uses one tunable optical element that can be controlled to perform various optical tasks, thereby achieving color tunability and other optical adjustments without increasing overall device complexity.
Solution Approach 2:
The invention introduces an intermediary optical element (such as a liquid crystal layer, photonic crystal, or metamaterial) that acts as a mediator between the light source and the external environment. This intermediary can be dynamically tuned to modify optical properties including color, intensity, and direction of light, providing versatile color tunability while keeping the overall device architecture relatively simple by consolidating multiple functions into this single mediating component.
3Adaptability or versatility
If optically functional fluid is moved between hollow spaces, then optical properties become adjustable, but device complexity increases
Solution Approach 1:
The patent utilizes pneumatic or hydraulic principles to control the movement of optically functional fluid between hollow spaces. By using pressure differential control (through pneumatic actuators or hydraulic pressure), the fluid can be moved to and fro between different chambers, changing the optical path and properties of the device. This approach provides adjustable optical properties while using well-established pressure control mechanisms rather than complex mechanical pumping systems.
Solution Approach 2:
The invention employs flexible membranes or thin films as movable boundaries between hollow spaces containing optically functional fluid. These flexible shells can be actuated to change volume or position of fluid chambers, thereby adjusting optical properties. The use of flexible thin films simplifies the overall structure compared to rigid mechanical pumps or valves, reducing device complexity while maintaining the ability to move fluid and adjust optics.
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 solution enables a versatile and efficient OLED device with adjustable optical properties, allowing for a wide range of colors and improved light extraction, reducing the need for complex architectures and enhancing longevity by maintaining a neutral or reflective nonoperational state.
Implementation Method 1
The first and the second hollow spaces are connected to one another by means of a fluid connection
Implementation Method 2
the first hollow space includes at least one first wetting electrode and/or the second hollow space includes at least one second wetting electrode
Implementation Method 3
improved light extraction
Implementation Method 4
conversion materials
Implementation Method 5
scattering particles
Data Source
AI summary
According to the present disclosure, an organic light-emitting diode device is disclosed with an organic light-emitting diode having a first main surface and a second main surface lying opposite the first main surface, an optically functional device having a first hollow space and a second hollow space, and a control element. The first hollow space is arranged on or over the first main surface, and the second hollow space is arranged below the second main surface. The first hollow space and the second hollow space are connected to one another by means of a fluid connection. An optically functional fluid is arranged in the optically functional device. The control element is configured to move the optically functional fluid to and fro between the first hollow space and the second hollow space.