Patent ID: 11968434
Assignee: LG INNOTEK CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 13:
14. A camera module, comprising:
a liquid lens; a voltage control circuit; and a switching unit:
wherein the liquid lens comprises:
a first plate comprising a cavity in which a conductive liquid and a non-conductive liquid are disposed;
a second plate disposed above the first plate;
a third plate disposed below the first plate;
a common electrode disposed on one side of the first plate; and
a plurality of individual electrodes disposed on an opposite side of the first plate,
wherein the voltage control circuit comprises:
a first voltage generator configured to output a first voltage; and
a load having one end connected to an output terminal of the first voltage generator and the other end connected to a reference voltage,
wherein the switching unit is connected between the one end of the load and the reference voltage,
wherein the switching unit comprises:
a plurality of first switches configured to transmit one selected from the first voltage and the reference voltage to the plurality of individual electrodes; and
a second switch configured to transmit one selected from the first voltage and the reference voltage to the common electrode,
wherein the first voltage is applied to the plurality of individual electrodes or the common electrode during a first predetermined period of time,
wherein, after application of the first voltage, a second voltage that is lower than the first voltage and is higher than the reference voltage is applied to the plurality of individual electrodes or the common electrode during a second predetermined period of time,
wherein a level of the first voltage is decreased to a level of the second voltage by the load,
wherein a sum of the first voltage and the second voltage is 70 V, and
wherein a ratio of the first voltage to the second voltage corresponds to a resistance of a resistor included in the load.