Electrophoretic Display Hexagonal Conductive Wires Color Saturation
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Solution Overview
Problem
Conventional electrophoretic display devices can only display black and white colors, and existing methods to achieve color display, such as using electrophoretic particles with different driving voltages or forming color resist layers, result in complex structures and material wastage.
Innovation Solution
An electrophoretic display device with a substrate, conductive wires forming geometric patterns like hexagons or dodecagons, active devices, pixel electrodes, and a color resist layer, where the color resist layer is optimized for increased area ratio and color saturation using inkjet printing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrophoretic particles with different colors are used, then color display capability is improved, but driving voltage complexity and device structure complexity increase
Solution Approach 1:
The patent applies color resist layers (red, green, blue) on the electrophoretic display panel to achieve color display. This principle directly addresses the color display capability by introducing color-filtering layers that modify the light output, allowing the device to display colors without requiring complex multi-voltage electrophoretic particles.
2Adaptability or versatility
If photolithographic processes are used to form color resist layers, then color display is achieved, but material waste and solution consumption increase
Solution Approach 1:
The patent transitions from photolithographic processes to inkjet printing technology for forming color resist layers. This parameter change in the manufacturing process enables precise material deposition, reducing color resist material waste and developing solution consumption while maintaining color display capability.
3Ease of manufacture
If conventional conductive wire layouts are used, then manufacturing is simplified, but pixel electrode area ratio and color saturation are reduced
Solution Approach 1:
The patent segments the conductive wires into first and second conductive wires that cross each other to form geometric patterns (hexagons or dodecagons). This segmentation allows for optimized pixel electrode placement within the geometric patterns, increasing the pixel electrode area ratio and improving color saturation while maintaining manufacturability.
Solution Approach 2:
The patent introduces geometric patterns (hexagons or dodecagons) as a dimensional optimization for the conductive wire layout. This dimensional change from conventional linear or grid patterns to geometric shapes optimizes the spatial arrangement, maximizing pixel electrode area within the available space while preserving ease of manufacture.
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 device achieves improved color saturation and gamut by forming geometric patterns with conductive wires and optimizing the color resist layer, allowing for efficient and effective colorful image display.
Implementation Method 1
electrophoretic display device
Data Source
AI summary
An electrophoretic display device includes a substrate, a plurality of first conductive lines, a plurality of second conductive lines, a plurality of active elements, a plurality of pixel electrode, an electrophoretic layer and a color resist layer. The first and second conductive lines are disposed over a surface of the substrate. The projections of the first and second conductive lines onto the surface constitute a plurality of geometric shapes. Each of the geometric shapes is a hexagon or a contour constructed of a plurality of hexagons adjoined together. Each of the active elements is electrically connected to one of the first conductive lines and one of the second conductive lines. Each of the pixel electrodes is electrically connected to one of the active elements. The electrophoretic layer is disposed over the pixel electrodes, and the color resist layer is disposed over the electrophoretic layer.