Invention Grant
- Patent Title: Methods and apparatus using multistage ultrasonic lens cleaning for improved water removal
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Application No.: US15492286Application Date: 2017-04-20
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Publication No.: US10596604B2Publication Date: 2020-03-24
- Inventor: Stephen John Fedigan , David Patrick Magee
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent Michael A. Davis, Jr.; Charles A. Brill; Frank D. Cimino
- Main IPC: B08B7/02
- IPC: B08B7/02 ; B60S1/56 ; B06B1/06 ; B60S1/02 ; B06B1/02 ; F26B5/02 ; G02B27/00

Abstract:
Methods and apparatus for using two stage ultrasonic lens cleaning for water removal are disclosed. An apparatus can expel fluid from a droplet on an optical surface using an ultrasonic transducer mechanically coupled to the optical surface and having first and second resonant frequency bands. A signal generator can generate a first signal including a first frequency to be coupled with the ultrasonic transducer mechanically coupled to the surface, and can generate a second signal including a second frequency to be coupled with the ultrasonic transducer mechanically coupled to the surface. Switching circuitry can activate the ultrasonic transducer at the first frequency to reduce the droplet from a first size to a second size, and to activate the ultrasonic transducer at the second frequency to reduce the droplet from the second size to a third size.
Public/Granted literature
- US20180085793A1 METHODS AND APPARATUS USING MULTISTAGE ULTRASONIC LENS CLEANING FOR IMPROVED WATER REMOVAL Public/Granted day:2018-03-29
Information query
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