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:
Jul. 12, 2016
Filed:
Dec. 12, 2013
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Ken Takahashi, Kumagaya, JP;
Osamu Ono, Fukaya, JP;
Shusuke Morita, Fukaya, JP;
Masahiro Yokota, Fukaya, JP;
Nobuo Kawamura, Kumagaya, JP;
Takeshi Ookawa, Kumagaya, JP;
Hidemi Matsuda, Toda, JP;
Hideo Oota, Tokyo, JP;
Takashi Nishimura, Fukaya, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Abstract
According to one embodiment, a lighting device includes a light source, and at least one light distribution control member configured to control distribution of light from the light source. The light distribution control member includes a base member higher in refractive index than air, and two optical control layers located opposite each other with a predetermined space therebetween on either side of the base member. The two optical control layers each includes a first region and a second region formed in correlative patterns. The light distribution control member is configured to control the light distribution based on a change of an overlap between the first and second regions depending on a direction of transmitted light.