LIQUID LENS CONTROL CIRCUIT, CAMERA MODULE, AND LIQUID LENS CONTROL METHOD

Title:

LIQUID LENS CONTROL CIRCUIT, CAMERA MODULE, AND LIQUID LENS CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/2019/146993

Kind Code:

A1

Abstract:

The present invention provides a camera module comprising a liquid lens and a voltage control circuit, wherein: the liquid lens comprises a first plate including a cavity in which a conductive liquid and a non-conductive liquid are arranged, a second plate arranged on the first plate, and a third plate arranged under the first plate; a common electrode is arranged on one side of the first plate; a plurality of individual electrodes are arranged on the other side of the first plate; the voltage control circuit comprises a first voltage generator for outputting a first voltage, and a DC bias end arranged between an output end of the first voltage generator and a ground voltage; and a switching unit comprises a plurality of first switches selecting either the first voltage or the ground voltage so as to transmit the same to the plurality of individual electrodes, and a second switch selecting either the first voltage or the ground voltage so as to transmit the same to the common electrode.

Inventors:

KIM CHANG WOOK (KR)

Application Number:

PCT/KR2019/000896

Publication Date:

August 01, 2019

Filing Date:

January 22, 2019

Export Citation:

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Assignee:

LG INNOTEK CO LTD (KR)

International Classes:

H04N5/232; G02B3/14; G02B7/04; G05F3/20; H02M3/155; H04N5/225

Foreign References:

US20120026596A1	2012-02-02
US20140247503A1	2014-09-04
US20090153208A1	2009-06-18
KR20080084824A	2008-09-19
KR20090018965A	2009-02-24

Other References: