Liquid lens, camera module and optical device including the same

A liquid lens, comprising:

• a first plate comprising a cavity in which a conductive liquid and a non-conductive liquid are disposed;
• 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 second plate comprises:
• a first region having a first thickness, the first region encompassing an optical axis;
• and
• a second region extending from the first region, the second region having a second thickness that is larger than the first thickness,
• wherein a location of an upper surface of the first region is lower than a location of an upper surface of the second region,
• wherein an upper portion of the first plate that faces the second plate comprises a stepped portion,
• wherein the stepped portion comprises:
• a first surface extending from an inclined surface of the cavity;
• and
• a second surface disposed closer to a lower surface of the second plate than the first surface, and
• wherein the first electrode and the second electrode are disposed on the first surface while being spaced apart from each other.