The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2014
Filed:
Mar. 24, 2009
Applicants:
Deng-ke Yang, Hudson, OH (US);
Lei Shi, Kent, OH (US);
Rui Bao, Wuhan, CN;
Inventors:
Assignee:
Kent State University, Kent, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/137 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); G02F 1/1341 (2006.01);
U.S. Cl.
CPC ...
G02F 1/13718 (2013.01); G02F 2001/13775 (2013.01);
Abstract
A bistable switchable liquid crystal device is provided in which the device can be switched between a transparent and an opaque state by a predetermined voltage pulse. The device is based on polymer stabilized cholesteric materials. No additional amount of voltage has to be applied to the device in order to sustain the optical states. Therefore, the device is energy-saving.