Title:
WAVELENGTH CONVERSION ELEMENT, LIGHT SOURCE UNIT AND PROJECTOR
Document Type and Number:
Japanese Patent JP2017111859
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a wavelength conversion element capable of reducing a temperature rise of a phosphor layer, and a light source unit and a projector.SOLUTION: A wavelength conversion element comprises: a wavelength conversion layer comprising a long wavelength phosphor layer and a short wavelength phosphor layer emitting light having a wavelength shorter than that of the long wavelength phosphor layer; and a substrate having a supporting surface supporting the wavelength conversion layer. In the wavelength conversion element, the short wavelength phosphor layer is provided at an opposite side to a substrate of the long wavelength phosphor layer, and the long wavelength phosphor layer is provided outside the short wavelength phosphor layer when being viewed in a direction of a surface normal of the supporting surface.SELECTED DRAWING: Figure 1
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Inventors:
SHIMIZU TETSUO
Application Number:
JP2015243006A
Publication Date:
June 22, 2017
Filing Date:
December 14, 2015
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
F21V29/502; F21V9/16; F21V29/10; G02B5/20; G03B21/00; G03B21/14; H01L33/50; H01S5/02
Attorney, Agent or Firm:
Masatake Shiga
Yoshifumi Saeki
Kazunori Onami
Yoshifumi Saeki
Kazunori Onami