Invention Grant
- Patent Title: Light emitting device
- Patent Title (中): 发光装置
-
Application No.: US14122683Application Date: 2012-04-02
-
Publication No.: US09322529B2Publication Date: 2016-04-26
- Inventor: Kenichi Yoshimura , Kohsei Takahashi , Hiroshi Fukunaga , Masatsugu Masuda
- Applicant: Kenichi Yoshimura , Kohsei Takahashi , Hiroshi Fukunaga , Masatsugu Masuda
- Applicant Address: JP Osaka-shi, Osaka
- Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee Address: JP Osaka-shi, Osaka
- Agency: Nixon & Vanderhye, P.C.
- Priority: JP2011-121811 20110531
- International Application: PCT/JP2012/058861 WO 20120402
- International Announcement: WO2012/165032 WO 20121206
- Main IPC: F21V9/16
- IPC: F21V9/16 ; H01L33/50 ; C09K11/77

Abstract:
Provided is a light emitting device with effectively improved color rendering properties. A light emitting device 1 includes: a light source 2 that emits light having the maximum intensity at a predetermined wavelength; a first phosphor (yellow phosphor) 51 that absorbs the light emitted by the light source 2 and outputs fluorescent light having the maximum intensity at a first wavelength which is longer than the predetermined wavelength; and a second phosphor (red phosphor) 52 that absorbs the light emitted by the light source 2 and outputs fluorescent light having the maximum intensity at a second wavelength which is longer than the first wavelength. An absolute value of wavelength dependency of an optical absorption rate of the second phosphor 52 at the first wavelength is set to not more than 0.6%/nm. Accordingly, the color rendering properties of the light emitted by the light emitting device 1 can be effectively improved.
Public/Granted literature
- US20140233209A1 LIGHT EMITTING DEVICE Public/Granted day:2014-08-21
Information query