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. 05, 2018
Filed:
Nov. 28, 2014
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Kazuhiro Wataya, Echizen, JP;
Toshihiro Tsumori, Echizen, JP;
Toshihiko Tsukatani, Echizen, JP;
Takehisa Minowa, Echizen, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
This lighting apparatus is provided with a blue LED chip having a maximum peak at a wavelength of 420-480 nm and a fluorescent material-containing resin layer disposed on the front of the blue LED chip in the light emission direction. The fluorescent material-containing resin layer is obtained by mixing and dispersing a LuAg fluorescent material, which is represented by the formula LuAlO:Ceand in which the Ce activation rate is 2 mol. % or lower relative to Lu, and a double fluoride fluorescent material represented by the formula A(BMn)F(in the formula, A is at least one type of element selected from among the group consisting of Li, Na, K and Cs, B is at least one type of element selected from among the group consisting of Si, Ti, Nb, Ge and Sn, and x is an integer that falls within the range 0.001≤x≤0.1) in a resin. The present invention is capable of achieving a higher sense of brightness, high visibility and a sense of brightness across a wide range under scotopic conditions or mesopic conditions with an emitted light color close to black body radiation.