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:
Nov. 12, 2013
Filed:
Nov. 09, 2011
Hiroaki Sakuta, Ibaraki, JP;
Kazuhiko Kagawa, Mie, JP;
Yoshihito Satou, Ibaraki, JP;
Hiroaki Okagawa, Tokyo, JP;
Shin Hiraoka, Ibaraki, JP;
Hiroaki Sakuta, Ibaraki, JP;
Kazuhiko Kagawa, Mie, JP;
Yoshihito Satou, Ibaraki, JP;
Hiroaki Okagawa, Tokyo, JP;
Shin Hiraoka, Ibaraki, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A white light-emitting semiconductor device having improved reproducibility of bright red. The device outputs light having a blue component, a green component, and a red component. Each of the light components (blue, green, and red) consists of a light-emitting semiconductor element and/or a phosphor that absorbs light emitted by a light-emitting semiconductor element and emits light through wavelength conversion. The outputted light has a spectrum which has a maximum wavelength in the range of 615-645 nm, and the intensity at a wavelength of 580 nm of the outputted light, which has been normalized with respect to luminous flux, is 80-100% of the intensity at a wavelength of 580 nm of standard light for color rendering evaluation, which has been normalized with respect to luminous flux.