logo

For the Inventor, By the Inventor

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 10228573 B1

PDFFull Text
Date of Patent:
Mar. 12, 2019

Filed:

Jul. 20, 2016

Projection device and projection-type video display device

Applicant:

Dai Nippon Printing Co., Ltd., Tokyo, JP;

Inventors:

Makio Kurashige, Kashiwa, JP;

Kazutoshi Ishida, Saitama, JP;

Tomoe Takanokura, Katsushika, JP;

Yasuyuki Ooyagi, Funabashi, JP;

Assignee:

Dai Nippon Printing Co., Ltd., Shinjuku-Ku, JP;

Attorney:

Burr & Brown, PLLC

Primary Examiner:

William C Dowling

Int. Cl.
CPC ...
G02B 27/48 (2006.01); H04N 9/31 (2006.01); G02B 26/12 (2006.01); G02B 26/08 (2006.01); G03B 21/20 (2006.01); G03H 1/00 (2006.01); G03H 1/22 (2006.01); G03H 1/32 (2006.01); G02B 27/10 (2006.01); G02B 5/02 (2006.01); G02B 26/10 (2006.01);
U.S. Cl.
CPC ...
G02B 27/48 (2013.01); G02B 5/0252 (2013.01); G02B 26/0816 (2013.01); G02B 26/103 (2013.01); G02B 26/105 (2013.01); G02B 26/123 (2013.01); G02B 26/124 (2013.01); G02B 27/1066 (2013.01); G03B 21/208 (2013.01); G03B 21/2033 (2013.01); G03B 21/2046 (2013.01); G03B 21/2066 (2013.01); G03H 1/00 (2013.01); G03H 1/22 (2013.01); G03H 1/2286 (2013.01); G03H 1/32 (2013.01); H04N 9/315 (2013.01); H04N 9/3129 (2013.01); H04N 9/3147 (2013.01); H04N 9/3161 (2013.01); H04N 9/3164 (2013.01); G03H 2222/36 (2013.01);
Abstract

Provided are a projection device and a projection-type video display device capable of displaying a plurality of videos, allowing speckles to be inconspicuous, and miniaturizing an optical system. A projection device includes an optical element including light diffusion elements capable of diffusing light, an irradiation device configured to irradiate the optical element with illumination light beams, each illumination light beam scanning the corresponding light diffusion element, spatial light modulators, each spatial light modulator being illuminated with illumination light beam which is incident from the irradiation device to each light diffusion element to be diffused, and projection optical systems, each projection optical system projecting modulation image obtained on each spatial light modulator on corresponding screen. The illumination light beam, which is incident to each position of each light diffusion element to be diffused, overlappedly illuminates on corresponding spatial light modulator.

Find Patent Forward Citations

Loading…