Anisotropic multiphasic particles for switchable optical displays
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Solution Overview
Problem
There is a need for low-cost, high-resolution, switchable optic display components that can reversibly change color in response to external force fields, such as magnetic fields, for applications in displays and electronic paper.
Innovation Solution
The use of anisotropic multiphasic particles with optically distinct phases, where at least one phase is receptive to a magnetic force field, allowing the display component to switch between different optical states when exposed to or removed from a magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional display components are used, then device simplicity is maintained, but manufacturing cost increases and resolution decreases
Solution Approach 1:
The particle is divided into multiple distinct phases (first phase with first colorant, second phase with second colorant, third phase with third colorant) that can be independently controlled. Each phase contains different colorants that can be selectively oriented to create various optical states, enabling high-resolution displays through precise phase arrangement rather than complex external components
Solution Approach 2:
The invention uses composite particles combining multiple colorants (cyan, magenta, yellow) in different phases within a single particle structure. This composite approach allows the particle to exhibit multiple colors and optical states by orienting different phases, achieving high-resolution displays with simpler device architecture compared to conventional single-colorant systems
2Adaptability or versatility
If magnetic materials are added to enable field responsiveness, then switchability improves, but particle complexity increases
Solution Approach 1:
The invention merges multiple functions into a single particle structure: colorant containment, magnetic responsiveness, and optical switching are all integrated within the multiphasic particle. The magnetic material is incorporated into one of the phases, allowing the entire particle to respond to magnetic fields for reversible optical state changes without requiring separate control mechanisms
Solution Approach 2:
The multiphasic particle serves multiple functions simultaneously: it acts as a colorant carrier, a magnetic responsive element, and an optical switching unit. The particle can be controlled by magnetic fields to reversibly change between different optical states, providing universal functionality for display applications without requiring complex additional components
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 reversible and reproducible color changes in optic displays, providing a high degree of control over the orientation and appearance of the particles, suitable for various display applications.
Implementation Method 1
at least one of the first phase or the one or more additional phases comprises a material receptive to a force field, so that the display component reversibly exhibits a first optical state in the presence of the force field
Data Source
AI summary
Optical display devices and methods of operating such devices are provided. The optical device includes a display component having a plurality of anisotropic multiphasic particles with at least two optically distinct phases. The plurality of anisotropic multiphasic particles is disposed in one or more regions of the display component that define an optic feature. Further, at least one of the phases of the anisotropic multiphasic particle comprises a material receptive to a force field, such as a magnetic material is receptive to an applied magnetic field. In this manner, the display component can reversibly exhibit a first optical state in the presence of the force field and thus is optionally switchable.