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:
Sep. 03, 2019
Filed:
Mar. 03, 2016
Texas Instruments Incorporated, Dallas, TX (US);
Yunhong Li, Santa Clara, CA (US);
Nabeel Fuad Khan, Sunnyvale, CA (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
Disclosed examples include ultrasonic cleaning systems, driver integrated circuits and methods for cleaning a lens, in which an oscillating drive signal is provided to an ultrasonic transducer and the driver controls the frequency of the drive signal according to a current sense signal representing a drive current flowing in the transducer. The driver sweeps the drive signal frequency and compares the sensed current values with predetermined profiles corresponding to a clean lens and a lens with one or more known contaminants, and generates the drive signal at one or more frequencies corresponding to peaks or valleys of the sensed current values or predetermined frequencies to promote cleaning of the lens.