Invention Grant
- Patent Title: Light emitting device having a coated nano-crystalline phosphor and method for producing the same
- Patent Title (中): 具有包覆纳米晶体荧光体的发光器件及其制造方法
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Application No.: US13536629Application Date: 2012-06-28
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Publication No.: US08502441B2Publication Date: 2013-08-06
- Inventor: Makoto Izumi , Kazunori Annen
- Applicant: Makoto Izumi , Kazunori Annen
- Applicant Address: JP Osaka-shi
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka-shi
- Agency: Morrison & Foerster LLP
- Priority: JP2011-142411 20110628; JP2012-085086 20120404
- Main IPC: H01J1/63
- IPC: H01J1/63 ; B23P17/04 ; B82Y20/00

Abstract:
A light emitting device includes a light emitting element that emits primary light and a wavelength conversion unit that absorbs part of the primary light and emits secondary light. In the light emitting device, the wavelength conversion unit includes a plurality of types of phosphors that emit secondary light having wavelengths different from each other, and at least one of the phosphors is a covered phosphor covered with a surface film that reflects secondary light emitted from a phosphor other than the covered phosphor.
Public/Granted literature
- US20130002124A1 LIGHT EMITTING DEVICE AND METHOD FOR PRODUCING THE SAME Public/Granted day:2013-01-03
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