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Title: Ultrahigh contrast light valve driven by electrocapillarity of liquid gallium
Authors: Jeff T. H. Tsai;Chih-Ming Ho;Fu-Cheng Wang;Chi-Te Liang
Contributors: 國立臺灣海洋大學:光電科學研究所
Date: 2009
Issue Date: 2013-04-08T02:37:13Z
Publisher: Applied Physics Letters
Abstract: Abstract:This letter describes an ultrahigh contrast valve driven by the electrocapillarity of liquid gallium. We demonstrate that a micrometer-sized gallium droplet can be used to fabricate a prototype backlight transmissive pixel cell by transforming the droplet into a flat thin film. This light valve exhibits significantly high backlight utility (96%), an exceptional contrast ratio (106:1), and fast response time (0.49 ms). The high contrast ratio originated from the exceptional reflectivity of gallium, which can block backlight to prevent any transmission in the off state of our device. Without using any polarizer, the backlight utility can be improved dramatically compared to a conventional liquid crystal display. The backlight utility and switching time obtained from this prototype light valve is higher than that of commercial liquid crystal displays. This concept is also applicable to a wide variety of electro-optical devices.
Relation: 95(25), pp.251110-1-251110-3
Appears in Collections:[Institute of Optoelectronic Sciences] Periodical Articles

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