Invention Grant
- Patent Title: Liquid lens control systems and methods
-
Application No.: US16500631Application Date: 2018-04-05
-
Publication No.: US11474284B2Publication Date: 2022-10-18
- Inventor: Jann Paul Kaminski , Raymond Miller Karam , Dragan Pikula , Daniel Ohen Ricketts
- Applicant: CORNING INCORPORATED
- Applicant Address: US NY Corning
- Assignee: CORNING INCORPORATED
- Current Assignee: CORNING INCORPORATED
- Current Assignee Address: US NY Corning
- Agent Tamika A. Crawl-Bey
- International Application: PCT/US2018/026288 WO 20180405
- International Announcement: WO2018/187591 WO 20181011
- Main IPC: G02B3/14
- IPC: G02B3/14 ; G02B3/00 ; G02B26/00 ; G02B27/64

Abstract:
Control systems for liquid lenses can use feedback control using one or more measured parameters indicative of a position of the fluid interface in the liquid lens. Capacitance between a fluid and an electrode in the liquid lens can vary depending on the position of the fluid interface. Current mirrors can be used for making measurements indicative of the capacitance and/or the fluid interface position. The liquid lens can be calibrated using the measurements indicative of capacitance and/or fluid interface position as the voltage is driven across an operational range. A control system can use pulse width modulation (PWM) for driving a liquid lens, and a carrier frequency for the PWM signals can be varied to control power consumption in the liquid lens. The slew rate can be adjustable to control power consumption in the liquid lens.
Public/Granted literature
- US20200096679A1 LIQUID LENS CONTROL SYSTEMS AND METHODS Public/Granted day:2020-03-26
Information query