US 12,332,425 B2
Lens curvature variation apparatus
Chang Wook Kim, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/753,967
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Sep. 17, 2020, PCT No. PCT/KR2020/012588
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2021/054750, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10-2019-0114937 (KR), filed on Sep. 18, 2019.
Prior Publication US 2022/0334375 A1, Oct. 20, 2022
Int. Cl. G02B 26/00 (2006.01); G02B 3/14 (2006.01)
CPC G02B 26/004 (2013.01) [G02B 3/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A lens curvature variation apparatus comprising:
a liquid lens including a common electrode and a plurality of individual electrodes;
a lens driver configured to apply a voltage to the common electrode and the plurality of individual electrodes;
a sensor unit
connected to at least one individual electrode among the plurality of individual electrodes and configured to output a sensing signal for sensing an interface of the liquid lens; and
a controller configured to control the lens driver based the sensing signal of the sensor unit,
wherein a number of the sensor unit is less than a number of the plurality of individual electrodes,
wherein the plurality of individual electrodes includes a first individual electrode connected to the sensor unit and a second individual electrode not connected to the sensor unit, and
wherein the controller is configured to obtain a sensing signal of the second individual electrode by using a sensing signal of the first individual electrode sensed through the sensor unit.