Dual Flat Printhead for E-Paper Printing Precision
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Solution Overview
Problem
Conventional printing devices are not designed for reusable electronic paper (E-paper), limiting their ability to efficiently print, erase, and rewrite text and graphics, which is essential for implementing E-paper as a reusable medium.
Innovation Solution
An E-paper printing device with a printhead configuration that applies an electric field using a first and second flat plate-like printhead, allowing for adjustable distance and movement, and incorporating pixel electrodes and a common electrode to generate electric fields for erasing and writing, along with a paper feeding mechanism for simultaneous erasing and writing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional single printhead is used for E-paper printing, then the device structure is simple, but the printing precision and speed are insufficient
Solution Approach 1:
The printhead is divided into a first printhead and a second printhead that are disposed opposite to each other. Each printhead has flat plate-like portions that contact the E-paper, enabling precise electric field application across the paper surface while maintaining a manageable structure through functional division.
2Productivity
If conventional printing devices are used on E-paper, then the device is readily available, but the ability to perform rapid printing with high precision is limited
Solution Approach 1:
The invention transitions from a single-sided printhead approach to a dual-sided opposite printhead configuration. This dimensional change allows simultaneous electric field application from both sides of the E-paper, enabling faster particle manipulation and higher printing speed while maintaining precision through the coordinated operation of both printheads.
3Manufacturing precision
If the printhead contacts the E-paper with a non-flat surface, then the device structure is flexible, but the printing precision deteriorates
Solution Approach 1:
The printhead is designed with flat plate-like portions specifically at the contact surfaces that interface with the E-paper. This local flatness ensures precise electric field application and high printing precision at the critical contact interface, while other parts of the printhead structure can maintain manufacturing flexibility and ease of fabrication.
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 configuration significantly improves printing precision and speed, enabling multiline pixel printing and efficient reuse of E-paper by allowing for simultaneous erasing and writing, thus enhancing the utility of E-paper as a reusable medium.
Implementation Method 1
pixel electrodes and a common electrode to generate electric fields which are directed from the pixel electrodes toward the common electrode or directed from the common electrode to the pixel electrodes
Implementation Method 2
a voltage is applied across the E-paper to form an electric field such that the charged particles in the E-paper are moved
Data Source
AI summary
The invention relates to the field of printing devices, more particularly to an E-paper printing device and an E-paper printing method. The E-paper printing device provided by the invention comprises a printhead for applying an electric field to the E-paper, the printhead comprises a first printhead and a second printhead disposed opposed to the first printhead, the E-paper is fed through between the first printhead and the second printhead, and portions of the first printhead and the second printhead contacting with the E-paper respectively are flat surface. The E-paper printing device may perform rapid printing on the E-paper with high precision.