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:
Mar. 24, 2026
Filed:
Oct. 17, 2022
Applicants:
Gwanak Analog Co., Ltd., Seoul, KR;
Seoul National University R&db Foundation, Seoul, KR;
Inventors:
Assignees:
Gwanak Analog CO., LTD., Seoul, KR;
Seoul National University R&DB Foundation, Seoul, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 21/47 (2006.01);
U.S. Cl.
CPC ...
G01N 21/47 (2013.01); G01N 2021/4733 (2013.01); G01N 2201/123 (2013.01);
Abstract
A dust sensor includes a photo detector configured to detect light scattered from dust; and a signal processing circuit having a high-pass filter receiving an electric signal generated from output of the photo detector. The signal processing circuit generates a dust detection signal using a signal provided to the high-pass filter as well as a signal output from the high-pass filter.