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Proceedings Paper

White ECD using zinc compound
Author(s): Naoya Kashiwazaki; Masao Yamana
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Paper Abstract

Adiabatic planning for building is a good idea for saving energy and favor of earth environment. Windows of housing are important for providing natural lighting and ventilation, however, they obstruct adiabatic planning. Light-controllable windows, which are called `smart windows' are of use and one solution for adiabatic planning. Smart windows can control the intensity of light as user pleases. Their driving mechanism uses some kind of chromism, thermochromism, photochromism and/or electrochromism. Electrochromic device (ECD) can control both light-holding and heat-radiation by electrochemical redox. Most ECDs using transitional metal oxide which have been studied have colored states such as blue or brown. We consider that white ECD is more suitable for living spaces. In our study, white ECD materials were developed for smart-windows by using a zinc compound. This window changes between a transparent- state and a white-state, like a Japanese-SHOJI', in response to electric conditions. This smart-window can also control light-intensity (transparency) by both applied pulse width and pulse voltage, and no power is consumed to maintain a state. A test trial device which was assembled by our project can change its states between transparency and white, in stable, during over 500 trials.

Paper Details

Date Published: 8 October 1999
PDF: 8 pages
Proc. SPIE 3788, Switchable Materials and Flat Panel Displays, (8 October 1999); doi: 10.1117/12.365788
Show Author Affiliations
Naoya Kashiwazaki, Tokyo Denki Univ. (Japan)
Masao Yamana, Tokyo Denki Univ. (Japan)

Published in SPIE Proceedings Vol. 3788:
Switchable Materials and Flat Panel Displays
Carl M. Lampert, Editor(s)

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