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:
Jun. 29, 2010
Filed:
Jun. 26, 2006
Satoko Horikoshi, Ibaraki, JP;
Ikuo Onishi, Ibaraki, JP;
Shigeki Kikuyama, Okayama, JP;
Yoshiki Mukoo, Ibaraki, JP;
Tsuyoshi Kanda, Niigata, JP;
Satoko Horikoshi, Ibaraki, JP;
Ikuo Onishi, Ibaraki, JP;
Shigeki Kikuyama, Okayama, JP;
Yoshiki Mukoo, Ibaraki, JP;
Tsuyoshi Kanda, Niigata, JP;
KURARAY Co., Ltd., Kurashiki-shi, JP;
Abstract
In a lighting device, suppose a distance between centers of linear light sources is D and a distance between the linear light sources and a light control member is H and a function representing an outgoing light intensity toward a normal direction at a position coordinate X (light source position shall be X=0) and f(X−D)+f(X)+f(X+D), in a range of −D/2≦X≦D/2, a ratio between g(X)and g(X)is 0.6 or more, a minimum value Xis in a range of −3.0D≦X≦−0.5D, a maximum value Xis in a range of 0.5≦X≦3.0D, and a cross-sectional shape of a given convex portion in X direction is formed of areas with (2N+1) number of different gradients represented by a certain relationship obtained from D, H and X.