Color Conversion Block Assembly for Uniform Low-Power Displays
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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 can be self-assembled using dielectrophoresis, allowing precise adjustment of particle densities and distribution, thereby improving color conversion efficiency and uniformity while reducing 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 patent employs self-assembly of color conversion particles through dielectrophoresis, where the particles automatically organize themselves into the desired density and distribution patterns under an electric field without requiring complex external manipulation. This self-service mechanism achieves precise particle arrangement while avoiding complicated manufacturing steps.
Solution Approach 2:
The patent replaces traditional mechanical mixing and spreading methods with dielectrophoresis, an electric field-based technique. This substitution allows precise control of particle density and distribution through electric field parameters rather than mechanical forces, achieving higher manufacturing precision with a more controllable process.
2Manufacturing precision
If color conversion efficiency is improved through better particle distribution, then color uniformity increases, but the manufacturing complexity increases
Solution Approach 1:
The patent achieves precise color uniformity by changing electric field parameters during the dielectrophoresis process. By adjusting voltage, frequency, and field distribution, the manufacturer can control particle density and arrangement to achieve uniform color conversion across the display, with parameters that can be optimized through software control rather than physical rework.
3Productivity
If the color conversion block structure is optimized for better performance, then light emitting efficiency improves, but the manufacturing time increases
Solution Approach 1:
The patent performs preliminary arrangement of color conversion particles using dielectrophoresis before final encapsulation. This preliminary action ensures that particles are already in their optimal positions for maximum light emitting efficiency when the device is assembled, eliminating the need for time-consuming adjustments or rework during later manufacturing stages.
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 self-assembled color conversion blocks enhance light emitting efficiency and color uniformity across subpixels, shortening the manufacturing process time and reducing power consumption.
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 at least one light-emitting element
Implementation Method 3
a plurality of magnetic particles
Data Source
AI summary
A display device can include a substrate on which a plurality of subpixels are 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 at least one light-emitting element. The plurality of color conversion blocks include 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.