Dielectrophoretic Color Conversion Blocks for Uniform Subpixel Emission
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Solution Overview
Problem
Existing display devices face challenges in achieving high color conversion efficiency, uniformity, and reduced power consumption, particularly in the manufacturing process due to difficulties in precisely adjusting the density and distribution of color conversion particles.
Innovation Solution
The display device incorporates color conversion blocks comprising color conversion particles, magnetic particles, and a dielectric material that are self-assembled using dielectrophoresis, allowing precise adjustment of particle densities and distribution, thereby improving color conversion efficiency and uniformity while reducing manufacturing time and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to manufacture color conversion blocks, then the manufacturing process is simpler, but the density and distribution of color conversion particles cannot be precisely adjusted
Solution Approach 1:
The color conversion block utilizes self-assembly of color conversion particles through dielectrophoresis, where the particles automatically organize themselves into optimal distributions based on electric field gradients, eliminating the need for complex external manipulation while achieving precise density and distribution control
Solution Approach 2:
The invention controls the density and distribution of color conversion particles by adjusting electrical parameters (electric field strength, frequency, and waveform) during the dielectrophoresis process, allowing precise manipulation of particle arrangement through parameter optimization rather than mechanical means
2Manufacturing precision
If color conversion efficiency is improved by increasing color conversion particles, then color uniformity improves, but manufacturing time increases
Solution Approach 1:
The dielectrophoresis process enables color conversion particles to self-organize into uniform distributions automatically under applied electric fields, achieving high color uniformity without requiring lengthy manual adjustment or iterative manufacturing steps
Solution Approach 2:
The invention performs preliminary arrangement of color conversion particles during the manufacturing process itself through dielectrophoresis, ensuring optimal density and distribution are achieved before final assembly, thereby avoiding time-consuming post-processing adjustments
3Productivity
If traditional assembly methods are used, then manufacturing process is simpler, but assembly time and power consumption increase
Solution Approach 1:
The color conversion block achieves self-assembly through dielectrophoresis, where particles automatically position themselves in optimal configurations under electric field control, dramatically reducing assembly time while the system manages complexity through automated field control rather than manual intervention
Solution Approach 2:
The invention replaces traditional mechanical assembly methods with an electrical field-based dielectrophoresis process, eliminating the need for physical manipulation and mechanical positioning tools, thereby reducing both assembly time and overall process complexity
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 enhances light emission efficiency, color uniformity, and reduces power consumption by precisely controlling the distribution of color conversion particles, leading to improved display quality and reduced manufacturing time.
Implementation Method 1
a dielectric material configured to surround the plurality of color conversion particles and the plurality of magnetic particles
Implementation Method 2
configured to convert a wavelength of light emitted from the light-emitting element
Implementation Method 3
a plurality of magnetic particles
Data Source
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AI summary
The present disclosure relates to display devices. According to an embodiment of the present disclosure, the display device comprises a substrate on which a plurality of subpixels is defined, a plurality of light-emitting elements at least one of which is disposed in a corresponding subpixel of the plurality of subpixels on the substrate, and a plurality of color conversion blocks disposed on at least one light-emitting element among the plurality of light-emitting elements and configured to convert a wavelength of light emitted from the light-emitting element, wherein the plurality of color conversion blocks comprise: a plurality of color conversion particles, a plurality of magnetic particles, and a dielectric material configured to surround the plurality of color conversion particles and the plurality of magnetic particles. Therefore, it is possible to enhance the light emitting efficiency and the color uniformity for each subpixel.