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:
Apr. 16, 2013
Filed:
Feb. 25, 2011
Yumiko Yoshikawa, Minato-ku, JP;
Tsutomu Ishi, Minato-ku, JP;
Ryuji Funayama, Yokohama, JP;
Shinya Kawamata, Gotenba, JP;
Yumiko Yoshikawa, Minato-ku, JP;
Tsutomu Ishi, Minato-ku, JP;
Ryuji Funayama, Yokohama, JP;
Shinya Kawamata, Gotenba, JP;
NEC Corporation, Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
A light with a known spectrum is emitted from a light source toward a road surface, a first reflected light that is a reflected light of the known light reflected from the road surface is received by a first light receiver, and a reflectance spectrum of the light of the road surface is calculated from a spectrum of the first reflected light received by the first light receiver and the spectrum of the known light stored in the storage unit. A second reflected light that is reflected light of an environmental light reflected from the road surface is received by a second light receiver, and a spectrum of the environmental light is calculated from a spectrum of the second reflected light received by the second light receiver and the calculated reflectance spectrum of the light of the road surface.