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.:
Date of Patent:
Jul. 01, 2025
Filed:
Dec. 06, 2022
Seiko Epson Corporation, Tokyo, JP;
Keita Tsukioka, Matsumoto, JP;
Kazunori Maeta, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A projector includes an exterior housing taking in outside air via a filter, a suction fan having an intake opening taking in the outside air, a front chamber communicating with the filter and the intake opening, a pressure sensor placed in the front chamber, and a control unit drive-controlling the suction fan. The control unit executes first measurement processing of activating the suction fan and measuring pressure of the front chamber at a rotation number at the activation by the pressure sensor, second measurement processing of setting a rotation number of the suction fan to a rotation number lower than the rotation number at the activation and measuring the pressure of the front chamber by the pressure sensor, and determination processing of determining clogging of the filter based on a difference between a pressure value of the first measurement processing and a pressure value of the second measurement processing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile