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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9551868 B1

PDFFull Text
Date of Patent:
Jan. 24, 2017

Filed:

Jul. 14, 2014

Scanning-type projection device

Applicant:

Nippon Seiki Co., Ltd., Niigata, JP;

Inventors:

Yasuhiro Yamakawa, Niigata, JP;

Shun Sekiya, Niigata, JP;

Assignee:

NIPPON SEIKI CO., LTD., Niigata, JP;

Attorney:

McDermott Will & Emery LLP

Primary Examiner:

Sherrie Hsia

Int. Cl.
CPC ...
H04N 3/08 (2006.01); H04N 9/31 (2006.01); G02B 27/01 (2006.01); G02B 27/48 (2006.01); G09G 3/00 (2006.01); G09G 3/02 (2006.01); G02B 27/09 (2006.01); G02B 27/28 (2006.01); G02B 26/08 (2006.01); G02B 26/10 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0101 (2013.01); G02B 27/0149 (2013.01); G02B 27/0927 (2013.01); G02B 27/0961 (2013.01); G02B 27/286 (2013.01); G02B 27/48 (2013.01); G09G 3/002 (2013.01); G09G 3/003 (2013.01); G09G 3/025 (2013.01); H04N 3/08 (2013.01); H04N 9/3129 (2013.01); G02B 26/0833 (2013.01); G02B 26/10 (2013.01); G02B 2027/0112 (2013.01); G02B 2027/0118 (2013.01); G02B 2027/0154 (2013.01); G09G 2320/043 (2013.01); G09G 2320/0666 (2013.01); G09G 2380/10 (2013.01);
Abstract

A scanning-type projection device is provided with an emitted-light-intensity control unit for controlling the light intensity of a laser light emitted by a laser light source unit, a polarization direction control unit for controlling the polarization direction of the laser light, a scanning unit for scanning the laser light and generating a display image, and a divergence unit on which the laser light scanned by the scanning unit is incident. The emitted-light-intensity control unit has a polarization control element for controlling the polarization state of the laser light, and a polarizing plate on which the laser light emitted from the polarization control element is incident, and the polarization direction control unit adjusts the polarization direction of display light incident on a projection surface by controlling the polarization direction of the laser light emitted by the emitted-light-intensity control unit.

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