Light modulating material

Details Light modulating material Light modulating material

2007-10-18

2009-11-24

Qi, Mike (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S112000, C349S130000

Reexamination Certificate

active

07623203

ABSTRACT:
The invention provides a light modulating material capable of supplying a predetermined light modulating property over a long period of time regardless of an incident light condition. The light modulating material includes at least: a first liquid crystal layer which has at least a dichroic dye and changes from a colorless transparency state to a colored transparency state when voltage is applied thereto; and a second liquid crystal layer which changes from a colorless transparency state to a white light-scattering state when voltage is applied thereto. The second liquid crystal layer is provided closer to a surface of the light modulating material on which light is incident compared to the first liquid crystal layer.

REFERENCES:
patent: 5342545 (1994-08-01), Yamada et al.
patent: 2004/0100598 (2004-05-01), Adachi et al.
patent: 2007/0268427 (2007-11-01), Uehara
patent: WO-02/093241 (2002-11-01), None
patent: WO-2004/005246 (2004-01-01), None
Kentaro Ichimura, Development of Chromic Material, CMC Publishing, pp. 226-236, 2000.
De Filpo et al., Liquid Crystals, vol. 29, No. 2, pp. 295-300, 2002.
Suzuki et al., Journal of Mater. Chem, vol. 13, pp. 2870-2874, 2003.
Liquid Crystal Handbook edited by the liquid crystal handbook editorial committee, Maruzen p. 498, 2000.

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