Title:
LASER LIGHT SOURCE DEVICE AND IMAGE PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO2015122347
Kind Code:
A1
Abstract:
An image projection device equipped with one or more laser light source devices (2), wherein the light emitted by the laser light source devices (2) is used as the projection light. The laser light source devices (2) are equipped with a plurality of light source units (3) for emitting laser beams. The plurality of light source units (3) are divided into a plurality of laser light source groups (6) according to the size of the angle of incidence of the optical axis of the laser beam on an incident surface (51). As the angle of incidence of a laser beam in the laser light source groups increases, the average value of the optical power of the laser beams in said laser light source groups increases.
Inventors:
YAMADA HIROTAKA (JP)
MORIYASU KENGO (JP)
MORIYASU KENGO (JP)
Application Number:
PCT/JP2015/053241
Publication Date:
August 20, 2015
Filing Date:
February 05, 2015
Export Citation:
Assignee:
USHIO ELECTRIC INC (JP)
International Classes:
G03B21/14; G02B6/42; G03B21/00; H01S3/00; H01S5/02
Foreign References:
| JP2015055739A | 2015-03-23 | |||
| JP2014157282A | 2014-08-28 | |||
| JP2008224889A | 2008-09-25 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
Patent business corporation ユニアス international patent firm (JP)
Patent business corporation ユニアス international patent firm (JP)
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