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 8403499 B1

PDF
Full Text
Expired
Date of Patent:
Mar. 26, 2013

Filed:

Sep. 13, 2007
Applicants:

Yoshifumi Nishimura, Tokyo, JP;

Hiroaki Takamatsu, Tokyo, JP;

Takayuki Okada, Tokyo, JP;

Inventors:

Yoshifumi Nishimura, Tokyo, JP;

Hiroaki Takamatsu, Tokyo, JP;

Takayuki Okada, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/16 (2006.01); F21V 29/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A light source lamp cooling apparatus according to the present invention includes: diaphragm air compressor (); an ejector which ejects cooling air directly onto a portion to be cooled of a light source lamp in lamp unit (); pressure detector () which detects pressure of the cooling air by means of pressure sensor () inserted in piping; air piping which connects air compressor () and the ejector; and a lamp controller which controls turning off of the light source lamp according to the air pressure detected by pressure detector (). Air compressor () is driven at a high control frequency and a hollow, flexible silicon tube is used as air piping to reduce pulsation of air.


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Nishimura, Yoshifumi. (2013). Light source lamp cooling apparatus and projection display apparatus including detecting gas pressure to control light source (U.S. Patent No. 8403499). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8403499

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