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:
Aug. 12, 2014
Filed:
Jun. 25, 2009
Katsuyoshi Suzuki, Soka, JP;
Shigehito Shimada, Chiba, JP;
Katsuyoshi Suzuki, Soka, JP;
Shigehito Shimada, Chiba, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, there is provided a visible-light communications system in which bidirectional visible-light communication is performed between a visible-light communications device and a mobile terminal. The device has one light source. The mobile terminal has a retroflection unit. The mobile terminal further has first and second optical filters. The first optical filter extracts a visible light beam modulated with the data transmitted from the visible-light communications device. The second optical filter extracts a visible light beam that will be used as a retroflection light beam that is not modulated.