Invention Grant
- Patent Title: Voice coil motor displacement sensor and controller
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Application No.: US14615318Application Date: 2015-02-05
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Publication No.: US09661198B2Publication Date: 2017-05-23
- Inventor: Christophe Marc Macours , Shawn William Scarlett , Michael Joehren
- Applicant: NXP B.V.
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Agent Rajeev Madnawat
- Priority: EP14155075 20140213
- Main IPC: H04N5/232
- IPC: H04N5/232 ; H04N5/225 ; H02P6/18 ; H02P25/034

Abstract:
A voice coil motor displacement sensor and a voice coil motor controller that uses said sensor. The sensor configured to apply an alternating measurement signal at a predetermined frequency to a voice coil motor, the sensor configured to use a measure of a voltage across and a current through the voice coil motor to determine its impedance at the predetermined frequency and determine an estimated displacement of said voice coil motor using said impedance and a predetermined displacement-impedance function.
Public/Granted literature
- US20150229814A1 VOICE COIL MOTOR SENSOR AND CONTROLLER Public/Granted day:2015-08-13
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