Switchable Element Reflectance Control via Electrophoresis
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Solution Overview
Problem
Existing organic light emitting display devices lack the ability to dynamically control reflectance for switching between mirror and non-mirror modes, limiting their versatility and functionality.
Innovation Solution
Incorporating a switchable element with a micro-capsule structure containing charged particles and a fluid set, where the reflectance is controlled by applying different voltages to change the position and distribution of particles, allowing the device to switch between mirror and non-mirror modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switchable element with micro-capsule structure is added to enable dynamic reflectance control, then the adaptability and functionality of the display device is improved, but the device complexity increases
Solution Approach 1:
The patent implements a nested structure where micro-capsules containing charged particles are embedded within a switchable element that is integrated into the display device. This nested arrangement allows the complex functionality of dynamic reflectance control to be achieved through a compact, hierarchical structure rather than separate components, thereby improving adaptability while managing device complexity.
Solution Approach 2:
The patent utilizes parameter changes by applying voltage to alter the electrical state of charged particles within the micro-capsules. This voltage-induced parameter change causes particles to move or reorient, dynamically adjusting the reflectance of the switchable element. This approach enables mirror/non-mirror mode switching through electrical parameter modulation rather than mechanical reconfiguration, improving adaptability while keeping the structural complexity manageable.
2Ease of operation
If voltage control mechanism is implemented to change particle distribution, then the operational flexibility is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent replaces mechanical particle manipulation mechanisms with an electrical control system. Instead of using mechanical actuators to move particles and achieve reflectance control, the invention applies voltage to exploit electrostatic forces that cause charged particles to redistribute within the micro-capsules. This substitution of mechanical control with electrical control improves ease of operation while the self-organizing nature of charged particles under electric fields helps mitigate stringent manufacturing precision requirements.
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 the display device to dynamically adjust reflectance based on voltage input, effectively switching between mirror and non-mirror modes, enhancing its operational flexibility and functionality.
Implementation Method 1
a switchable element with a micro-capsule structure containing charged particles and a fluid set, where the reflectance is controlled by applying different voltages to change the position and distribution of particles
Data Source
AI summary
A display device may include a light-emitting element and a controllable element. The light-emitting element may emit a light. The controllable element may neighbor the light-emitting element in a plan view of the display device and may include a fluid set. The fluid set may include at least one of a light-reflecting element set and a black element set. The controllable element may have a first average reflectance value in a first direction if the controllable element receives no voltage or receives a first voltage. The controllable element may have a second average reflectance value in the first direction if the controllable element receives a second voltage. The second voltage may be unequal to the first voltage. The second average reflectance value may be unequal to the first average reflectance value.