US 12,306,420 B2
Liquid lens, camera module and optical device including the same
Won Jin Kim, Seoul (KR); and Jung Eun Han, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/057,573
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed May 23, 2019, PCT No. PCT/KR2019/006167
§ 371(c)(1), (2) Date Nov. 20, 2020,
PCT Pub. No. WO2019/225975, PCT Pub. Date Nov. 28, 2019.
Claims priority of application No. 10-2018-0058606 (KR), filed on May 23, 2018.
Prior Publication US 2021/0149088 A1, May 20, 2021
Int. Cl. G02B 3/14 (2006.01); G02B 7/02 (2021.01); G03B 17/12 (2021.01); H01B 1/12 (2006.01); H04N 23/55 (2023.01)
CPC G02B 3/14 (2013.01) [G02B 7/021 (2013.01); G03B 17/12 (2013.01); H01B 1/12 (2013.01); H04N 23/55 (2023.01)] 8 Claims
OG exemplary drawing
 
1. A liquid lens, comprising:
a first plate in which a cavity accommodating a conductive liquid and a non-conductive liquid is formed;
a first electrode disposed on the first plate;
a second electrode disposed under the first plate;
a second plate disposed on the first electrode; and
a third plate disposed under the second electrode,
wherein the conductive liquid comprises:
a solvent comprising 20 to 60% by weight of water and 20 to 60% by weight of antifreeze;
10 to 20% by weight of a solute; and
0.4 to 2% by weight of a chelation agent or an ion inhibitor,
wherein a content of halogen elements in the conductive liquid is maintained at 50 ppm or less so the liquid lens contains a substantially halogen-free electrolyte, and
wherein the chelation agent or the ion inhibitor comprises 1% by weight of meta-nitrophenol.