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:
Nov. 12, 2019
Filed:
Jan. 29, 2014
Tria Beauty, Inc., Dublin, CA (US);
Harvey I-Heng Liu, Fremont, CA (US);
John P. Beale, Mountain View, CA (US);
CHANNEL INVESTMENTS, LLC, Tampa, FL (US);
Abstract
A battery-powered laser-based dermatological treatment device may include a laser unit comprising at least one laser diode, a battery unit, at least one sensor configured to generate sensor signals, and a laser drive control system including a laser drive circuit comprising the laser unit, the battery unit, a first switch (e.g., a first FET), and a second switch (e.g., a second FET), wherein the laser unit is arranged in series between the first switch and the second switch, and control electronics configured to control the first switch based at least on sensor signals from the at least one sensor, and control the second switch using pulse width modulation (PWM), thereby delivering current from the battery unit to the laser unit with a PWM current waveform. The laser drive circuit may also include a snubber circuit configured to prevent voltage spikes upon the second switch being turned off.