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. 22, 2020
Filed:
Sep. 11, 2017
Applicant:
Kent State University, Kent, OH (US);
Inventors:
Deng-Ke Yang, Hudson, OH (US);
Meina Yu, Kent, OH (US);
Assignee:
Kent State University, Kent, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/137 (2006.01); C09K 19/58 (2006.01); G02F 1/1343 (2006.01);
U.S. Cl.
CPC ...
G02F 1/13718 (2013.01); C09K 19/586 (2013.01); G02F 1/1343 (2013.01);
Abstract
A bistable cholesteric liquid crystal switchable window has two stable states in the absence of an applied voltage. A first stable state is a planar state which is transparent or reflective for visible light. A second stable state is a focal conic state which is opaque for visible light. The window can be switched from the first stable state to the second stable state via a first voltage pulse and from the second stable state to the first stable state via a second voltage pulse. The first voltage pulse and the second voltage pulse may have the same frequency.