Invention Grant
- Patent Title: Light emitting module and lighting device
- Patent Title (中): 发光模块和照明装置
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Application No.: US14031554Application Date: 2013-09-19
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Publication No.: US08952607B2Publication Date: 2015-02-10
- Inventor: Miho Watanabe
- Applicant: Toshiba Lighting & Technology Corporation
- Applicant Address: JP Yokosuka-shi, Kanagawa-ken
- Assignee: Toshiba Lighting & Technology Corporation
- Current Assignee: Toshiba Lighting & Technology Corporation
- Current Assignee Address: JP Yokosuka-shi, Kanagawa-ken
- Agency: Banner & Witcoff, Ltd.
- Priority: JP2013-032644 20130221
- Main IPC: H05B33/12
- IPC: H05B33/12 ; H01L33/50

Abstract:
A light emitting module according to one embodiment includes a substrate; a light emitting body disposed on the substrate; and a phosphor layer having a first phosphor and a second phosphor which are excited by emitted light of the light emitting body. The first phosphor has a light emitting peak whose half-value width is 20 nm or less in a wavelength range from 610 nm to less than 650 nm, and the second phosphor has the light emitting peak in the wavelength range between a peak wavelength of a light emitting spectrum of the light emitting body and the peak wavelength of the light emitting spectrum of the first phosphor. Then, a distribution of the first phosphor in the phosphor layer has density gradient, where the density of the first phosphor increases toward at least one end of the phosphor layer in a direction perpendicular to the substrate.
Public/Granted literature
- US20140232257A1 Light Emitting Module and Lighting Device Public/Granted day:2014-08-21
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