Title:
Light equipment and a projection type display
Document Type and Number:
Japanese Patent JP6195321
Kind Code:
B2
Abstract:
A light source device is equipped with a light source main unit, an optical element, a phosphor unit, and a condensing element. The optical axis of the light source main unit is shifted from the optical axis of the condensing element. The reflection direction of light of a first wavelength in a reflecting region intersects direction of the light of the first wavelength incident to the reflecting region. In response to the irradiation of the light of a first wavelength, fluorescent regions emit light of a second wavelength in a direction opposite to the direction of light of the first wavelength incident to the reflecting region and in the direction of reflection of light of the first wavelength in the reflecting region. In addition, fluorescent regions are capable of reflecting light of the second wavelength that is incident to the fluorescent regions. The direction of reflection of light of the second wavelength in the optical element is the same as the direction of light of the first wavelength that has passed through the optical element.
Inventors:
Atsushi Kato
Application Number:
JP2015556661A
Publication Date:
September 13, 2017
Filing Date:
January 08, 2014
Export Citation:
Assignee:
NEC Display Solutions Co., Ltd.
International Classes:
G03B21/14; F21S2/00; F21V7/22; F21V9/16; F21V9/40; G03B21/00
Domestic Patent References:
| JP2013250285A | ||||
| JP2013047736A | ||||
| JP2012003923A |
Foreign References:
| US20130100417 |
Attorney, Agent or Firm:
Akio Miyazaki
Masaaki Ogata
Masaaki Ogata