Study for Digital Paper Technology

“数字纸”是最近提出的一种兼具软拷贝和硬拷贝优点的新媒介。本研究的目的是(1)明确数字纸的理想人机界面，(2)实现新的数字纸显示设备。(1)明确数字纸的理想人机界面本研究旨在比较硬拷贝工作和软拷贝工作的操作效率。我们的目标是澄清为什么硬拷贝工作通常对人类来说是舒适的原因，并了解数字纸的人机界面要求。进行了客观测试和主观测试，阐明了硬拷贝媒体和软拷贝媒体的区别。(2)数字纸显示装置的实现研究。2.1扭转球显示方法利用大比例模型球对球的行为进行了基本实验。测量了不同条件下双稳态运动的阈值电场和切换球向时的响应时间。对球的自转力矩进行了理论研究。描述了基于库仑力的球旋转方程。制备了2.2G/H型PDLCA客体-主体型液晶平板介质。离子投影头用于表面电荷的形成。证实了通过离子投影，然后加热擦除黑底图像，可以在黑底上重复形成白色图像。实验结果表明，该平板介质具有理想的特性，再现了纸张的视角和灵活性。2.3电泳显示方法我们制备了以微胶囊为介质，以离子投影头为驱动器，在蓝色背景上获得了清晰的白色图像。作为数字纸，这种介质提供了离子投影非接触式书写、易于制造和物理灵活性的显著好处。

"Digital Paper" was recently proposed as a new medium that offers the advantages of both softcopy and hardcopy. This study aims at (1) to clarify the ideal human-interface for Digital Paper, and (2) to realize new display devices for Digital Paper.(1) Study for clarifying ideal human-interface for the Digital PaperThis study aims at comparison of operation efficiency between hardcopy work and softcopy work. Our goal is to clarify the reason why hardcopy work is generally comfortable for human, and to know human-interface requirements for the Digital Paper. Objective tests and subjective tests were carried out, and the difference between hardcopy and softcopy media were clarified.(2)Study for realizing display devices for the Digital Paper.2.1 Twisting ball display methodWe carry out basic experiments into ball behavior by using enlarged scale model balls. Threshold electric fields for bistable motion and response time when switching ball direction are measured under various conditions. A theoretical study on the moments of ball rotation is introduced. An equation that yields ball rotation is described that is based on the coulomb force.2.2 G/H type PDLCA guest-host type liquid crystal sheet medium was prepared. An ion projection head was used for surface charge formation. It was confirmed that white images could be repeatedly formed on a black background by ion projection followed by image erasure to the black background by heating. It is demonstrated that this sheet medium has ideal characteristics ; it reproduces the viewing angle and flexibility of paper.2.3 Electrophoretic display methodWe prepared a microcapsule electrophoretic display as the medium and an ion projection head as the driver ; clear white images on a blue background were achieved. As digital paper, this medium offers the significant benefits of non-contact writing by ion projection, ease of manufacturing, and physical flexibility.