Title:
Lighting installation
Document Type and Number:
Japanese Patent JP6036728
Kind Code:
B2
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 Lu 3 Al 5 O 12 : Ce 3+ and 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 2 (B 1-x Mn x )F 6 (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.
Inventors:
Kazuhiro Wataya
Toshihiro Tsumori
Toshihiko Tsukaya
Minowa Takehisa
Toshihiro Tsumori
Toshihiko Tsukaya
Minowa Takehisa
Application Number:
JP2014037808A
Publication Date:
November 30, 2016
Filing Date:
February 28, 2014
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
F21S2/00; C09K11/00; C09K11/08; C09K11/61; C09K11/66; C09K11/67; C09K11/80; F21S8/08
Domestic Patent References:
| JP2011233511A | ||||
| JP201262444A | ||||
| JP2013502711A | ||||
| JP20058844A |
Attorney, Agent or Firm:
Takashi Kojima
Saori Shigematsu
Katsunari Kobayashi
Takeshi Ishikawa
Katsuhiko Masaki
Saori Shigematsu
Katsunari Kobayashi
Takeshi Ishikawa
Katsuhiko Masaki