Electrophoresis Display Panel White Sub-pixel Buffering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrophoresis display panels face color mixing problems due to misalignment and inaccurate consumption of electrophoretic fluids during inkjet printing, leading to discoloration and increased costs with photolithography and etching processes.
Innovation Solution
An electrophoresis display panel design featuring separate primary color sub-pixels and white sub-pixels, where each primary color sub-pixel adjoins only white sub-pixels, preventing color mixing, and using ultraviolet light to cure and seal the electrophoretic fluids within micro-cups, reducing material waste and misalignment issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inkjet printing process is used to fill micro-cups with electrophoretic fluids, then cost is reduced, but misalignment and inaccurate consumption occur causing color mixing problems
Solution Approach 1:
The display panel is divided into separate red, green, and blue sub-pixels with distinct micro-cups for each color. Each sub-pixel is independently filled with its specific electrophoretic fluid through separate inkjet printing operations, preventing color mixing while maintaining cost-effectiveness. The segmentation of functional areas allows precise control over fluid placement in each region.
2Manufacturing precision
If photolithography and etching processes are used to seal electrophoretic fluids, then color mixing problems are mitigated, but material waste increases cost
Solution Approach 1:
The patent extracts and eliminates the need for photolithography and etching processes by using a simplified sealing approach. A sealing layer is formed directly over the micro-cups containing electrophoretic fluids, providing effective sealing without requiring complex photolithography patterns or etching steps. This removes the source of material waste while maintaining sealing precision.
3Area of stationary object
If primary color sub-pixels adjoin each other, then display coverage is improved, but color mixing and discoloration occur
Solution Approach 1:
White sub-pixels serve as intermediary elements positioned between primary color sub-pixels. These white sub-pixels act as buffers that prevent direct contact and potential mixing between red, green, and blue electrophoretic fluids. The intermediary white sub-pixels maintain clear boundaries while still contributing to overall display coverage and pixel density.
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 effectively prevents color mixing and discoloration, maintaining display quality while reducing material waste and costs by ensuring precise placement and curing of electrophoretic fluids.
Implementation Method 1
using ultraviolet light to cure and seal the electrophoretic fluids within micro-cups
Implementation Method 2
By applying voltages, the electrically-charged white particles are moved, such that each pixel respectively displays black, white, or different gray levels
Data Source
AI summary
An electrophoresis display panel includes a plurality of first sub-pixels, a plurality of second sub-pixels, a plurality of third sub-pixels, and a plurality of white sub-pixels. The first sub-pixels, the second sub-pixels, and the third sub-pixels are suitable for irradiating different light of three primary colors, respectively, while the white sub-pixels are suitable for irradiating white light. Each of the first sub-pixels does not adjoin the second sub-pixels and the third sub-pixels. Each of the second sub-pixels does not adjoin the third sub-pixels. Each of the first sub-pixels adjoins the white sub-pixels exclusively or adjoins the white sub-pixels and other first sub-pixels exclusively.