Title:
投射型表示装置
Document Type and Number:
Japanese Patent JP6669068
Kind Code:
B2
Abstract:
A projection display unit includes a projection optical system, a polarization separation device, and a detection optical system. The projection optical system includes an illuminator, a projection lens, and a light valve that modulates illumination light supplied from the illuminator, and outputs the modulated illumination light toward the projection lens. The polarization separation device separates entering light into a first polarized component and a second polarized component, and outputs the first polarized component and the second polarized component in respective directions that are different from each other. The detection optical system includes an imaging device and a reduction optical system. The imaging device receives, via the projection lens and the polarization separation device, light based on detection invisible light. A transmittance adjuster provided between the polarization separation device and the imaging device adjusts transmittance of at least part of a bundle of passing light rays derived from the invisible light.
Inventors:
Kaneda Kazutoshi
Application Number:
JP2016545058A
Publication Date:
March 18, 2020
Filing Date:
July 23, 2015
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G03B21/14; G03B21/00; H04N5/74
Domestic Patent References:
| JP2010538685A | ||||
| JP2003044839A | ||||
| JP9080372A | ||||
| JP9305312A | ||||
| JP2013073199A | ||||
| JP2013003859A |
Foreign References:
| WO2013111376A1 |
Attorney, Agent or Firm:
Patent Business Corporation Tsubasa International Patent Office