Title:
Laser light source device and projection display device
Document Type and Number:
Japanese Patent JP6314553
Kind Code:
B2
Abstract:
A laser light source device (3) and a projection display apparatus are provided. The laser light source device (3) includes a laser light source (10, 11, 12) configured to combine laser beams to emit a laser beam bundle, a homogenizer (14) configured to remove or reduce coherence of the laser beam bundle, an output optical system (20) configured to output the laser beam bundle, a beam splitter (16) configured to branch a part of the laser-beam bundle, a photosensor (18) including photodetectors configured to receive the for-detection laser-beam bundle (LS), and a light emission controller (25) configured to control light emission of the laser light source (10, 11, 12). The projection display apparatus irradiates an image displayed on an image display element (2) with illumination light from the laser light source device (3) and projects light modulated by the image upon magnifying the light by a projection optical system (4).
Inventors:
Toshiharu Murai
Kazuhiro Fujita
Tatsuya Takahashi
Takehiro Nishimori
Kazuhiro Fujita
Tatsuya Takahashi
Takehiro Nishimori
Application Number:
JP2014045439A
Publication Date:
April 25, 2018
Filing Date:
March 07, 2014
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03B21/14; F21S2/00; F21V23/00; F21V25/04; G03B21/00; H04N5/74
Domestic Patent References:
| JP2012002871A | ||||
| JP2009145844A |
Foreign References:
| US20100328610 | ||||
| US20120038892 |
Attorney, Agent or Firm:
Shuichi Kudo
Toru Kabayama
Shogo Honda
Toru Kabayama
Shogo Honda