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:
Mar. 25, 2014
Filed:
Sep. 14, 2012
Ken Takahashi, Kumagaya, JP;
Osamu Ono, Fukaya, JP;
Hidemi Matsuda, Toda, JP;
Nobuo Kawamura, Kumagaya, JP;
Shusuke Morita, Fukaya, JP;
Masahiro Yokota, Fukaya, JP;
Takashi Nishimura, Fukaya, JP;
Ken Takahashi, Kumagaya, JP;
Osamu Ono, Fukaya, JP;
Hidemi Matsuda, Toda, JP;
Nobuo Kawamura, Kumagaya, JP;
Shusuke Morita, Fukaya, JP;
Masahiro Yokota, Fukaya, JP;
Takashi Nishimura, Fukaya, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a lighting device includes a radiation surface, at least one light source provided to face the radiation surface, and an optical control member provided between the radiation surface and the light source and includes optical characteristics of transmission, diffraction, diffusion, and reflection, which vary for regions in the optical control member, a distribution of each of the optical characteristics being determined by positions relative to the at least one light source. The optical control member is formed in a sheet shape which is controlled by at least one of a reflective film having a reflection factor distribution, and a reflective film having a numerical aperture distribution, and lenses.