Slanted Microbore Electronic Paper Display for Multicolor Control
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Solution Overview
Problem
Existing electronic paper display devices using the electrophoretic display method face difficulties in achieving stable bicolor or multicolor displays due to challenges in controlling and selecting display particles under an external electric field, limiting the category and size options for display particles.
Innovation Solution
The implementation of a substrate with a slanted microbore layer, where electrophoretic display particles are enclosed within slanted microbores with different colors, allowing the slanted microbore walls to contribute to the display, reducing the number of required particle colors and simplifying particle control, thereby facilitating bicolor or multicolor displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrophoretic display particles of at least two colors are used for bicolor display or multicolor display, then color display capability is improved, but particle control stability and selection limitations worsen
Solution Approach 1:
The invention divides the display structure into separate vertical microbores, each containing particles of a specific color. This segmentation isolates different color particles into independent channels, eliminating the control instability that occurs when multiple color particles share the same space. Each microbore acts as an independent unit that can be controlled separately, solving the particle control stability problem while maintaining multicolor display capability.
Solution Approach 2:
The invention applies local quality by giving each vertical microbore a specific color characteristic through the color of its transparent wall. The microbore walls are colored to match specific wavelengths, creating local color properties that enhance the overall display. This allows different regions (microbores) to have different color qualities, enabling multicolor display while simplifying particle control since each microbore primarily displays its wall color.
2Adaptability or versatility
If multiple kinds of electrophoretic display particles are used, then color variety is improved, but device complexity and particle selection requirements worsen
Solution Approach 1:
The invention fundamentally changes the approach to color display by making the microbore walls themselves colored rather than relying solely on colored particles. The transparent walls are dyed or coated with specific colors that correspond to different wavelength ranges. This color change in the structural elements reduces the need for multiple kinds of colored particles, simplifying particle selection while maintaining color variety through the colored walls.
Solution Approach 2:
The colored microbore walls serve multiple functions: they provide structural containment for the particles, act as color filters for display, and define the optical characteristics of each pixel. This multi-functionality reduces the need for separate colored particles for each function, simplifying the overall system while maintaining color variety.
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
This approach enables easier realization of bicolor or multicolor displays by utilizing the colors of both the electrophoretic particles and the slanted microbore walls, reducing the complexity and requirements for particle types and dimensions, while enhancing color purity and reflectance.
Implementation Method 1
Electrophoretic display particles of colors are used in the electrophoretic display method, arranged in order by the change of an externally applied electric field
Data Source
AI summary
Embodiments of present invention provide an electronic paper display device and a manufacturing method thereof. The electronic paper display device comprises a substrate, a first conducting layer on the substrate and a slanted microbore layer provided on the first conducting layer. The slanted microbore layer comprises a plurality of slanted microbores of a color, electrophoretic display particles are enclosed within the slanted microbores and have different colors from that of the slanted microbores. Each of the slanted microbores comprises an orifice, slanted bore walls and a bore bottom, the angle between the slanted bore walls and the substrate is less than 90°, and the vertical projection of the orifice onto the surface of the substrate is located outside of the bore bottom of the slanted microbore.