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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 9274408 B1

PDFFull Text
Date of Patent:
Mar. 01, 2016

Filed:

Apr. 02, 2015

Projection display device

Applicant:

Nec Display Solutions, Ltd., Tokyo, JP;

Inventor:

Shuichi Nakanishi, Tokyo, JP;

Assignee:

NEC DISPLAY SOLUTIONS, LTD., Tokyo, JP;

Attorney:

McGinn IP Law Group PLLC

Primary Examiner:

Sultan Chowdhury

Int. Cl.
CPC ...
G03B 21/00 (2006.01); G03B 21/20 (2006.01); H04N 9/31 (2006.01); G03B 21/16 (2006.01); G09G 3/34 (2006.01); G09G 3/00 (2006.01);
U.S. Cl.
CPC ...
G03B 21/2053 (2013.01); G03B 21/16 (2013.01); G03B 21/2033 (2013.01); G09G 3/3413 (2013.01); H04N 9/3155 (2013.01); G09G 3/002 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/041 (2013.01); G09G 2320/064 (2013.01); G09G 2320/0646 (2013.01); G09G 2330/06 (2013.01); G09G 2360/145 (2013.01); G09G 2360/16 (2013.01);
Abstract

A projection display device having a plurality of light sources and including a plurality of light sensors installed in association with the light sources, respectively, and a controller for controlling amounts of lights emitted from the light sources depending on corresponding output signals from the light sensors to keep constant a ratio of the amount of light emitted from the light sources. The controller controls each light sources used in control signals whose frequencies are different from each other.

Find Patent Forward Citations

Nakanishi, Shuichi. (2016). Projection display device (U.S. Patent No. 9274408). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9274408

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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