Highly Reflective Multi-stable Electrofluidic Display Pixels

Bibliographic Details
Main Author:	Yang, Shu
Language:	English
Published:	University of Cincinnati / OhioLINK 2012
Subjects:	Engineering electrofluidic display multi-stable highly reflective electrowetting
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=ucin1329510668

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-ucin13295106682021-08-03T06:15:19Z Highly Reflective Multi-stable Electrofluidic Display Pixels Yang, Shu Engineering electrofluidic display multi-stable highly reflective electrowetting Electronic papers (E-papers) refer to the displays that mimic the appearance of printed papers, but still owning the features of conventional electronic displays, such as the abilities of browsing websites and playing videos. The motivation of creating paper-like displays is inspired by the truths that reading on a paper caused least eye fatigue due to the paper’s reflective and light diffusive nature, and, unlike the existing commercial displays, there is no cost of any form of energy for sustaining the displayed image. To achieve the equivalent visual effect of a paper print, an ideal E-paper has to be a highly reflective with good contrast ratio and full-color capability. To sustain the image with zero power consumption, the display pixels need to be bistable, which means the “on” and “off” states are both lowest energy states. Pixel can change its state only when sufficient external energy is given. There are many emerging technologies competing to demonstrate the first ideal E-paper device. However, none is able to achieve satisfactory visual effect, bistability and video speed at the same time. Challenges come from either the inherent physical/chemical properties or the fabrication process. Electrofluidic display is one of the most promising E-paper technologies. It has successfully demonstrated high reflectivity, brilliant color and video speed operation by moving colored pigment dispersion between visible and invisible places with electrowetting force. However, the pixel design did not allow the image bistability.Presented in this dissertation are the multi-stable electrofluidic display pixels that are able to sustain grayscale levels without any power consumption, while keeping the favorable features of the previous generation electrofluidic display. The pixel design, fabrication method using multiple layer dry film photoresist lamination, and physical/optical characterizations are discussed in details. Based on the pixel structure, the preliminary results of a simplified design and fabrication method are demonstrated. As advanced research topics regarding the device optical performance, firstly an optical model for evaluating reflective displays’ light out-coupling efficiency is established to guide the pixel design; Furthermore, Aluminum surface diffusers are analytically modeled and then fabricated onto multi-stable electrofluidic display pixels to demonstrate truly “white” multi-stable electrofluidic display modules. The achieved results successfully promoted multi-stable electrofluidic display as excellent candidate for the ultimate E-paper device especially for larger scale signage applications. 2012-04-20 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1329510668 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1329510668 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Engineering electrofluidic display multi-stable highly reflective electrowetting
spellingShingle	Engineering electrofluidic display multi-stable highly reflective electrowetting Yang, Shu Highly Reflective Multi-stable Electrofluidic Display Pixels
author	Yang, Shu
author_facet	Yang, Shu
author_sort	Yang, Shu
title	Highly Reflective Multi-stable Electrofluidic Display Pixels
title_short	Highly Reflective Multi-stable Electrofluidic Display Pixels
title_full	Highly Reflective Multi-stable Electrofluidic Display Pixels
title_fullStr	Highly Reflective Multi-stable Electrofluidic Display Pixels
title_full_unstemmed	Highly Reflective Multi-stable Electrofluidic Display Pixels
title_sort	highly reflective multi-stable electrofluidic display pixels
publisher	University of Cincinnati / OhioLINK
publishDate	2012
url	http://rave.ohiolink.edu/etdc/view?acc_num=ucin1329510668
work_keys_str_mv	AT yangshu highlyreflectivemultistableelectrofluidicdisplaypixels
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Highly Reflective Multi-stable Electrofluidic Display Pixels

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