Patent ID: 8861092

Claim:
A curvature control device comprising: a first fluid having a first light transmitting property and a polarity; a second fluid that has a second light transmitting property and is not mixed with the first fluid; a chamber which forms an inner space for containing the first fluid F 1 and the second fluid F 2 , the chamber comprising a lens area in which an optical interface is disposed between the first fluid and the second fluid and a plurality of channel areas comprising: at least one main channel in which a first driving interface is disposed at a first interface between the first fluid and the second fluid to induce a variation in a curvature of the optical interface, and at least one sub-channel in which a second driving interface is disposed at a second interface between the first fluid and the second fluid to induce the variation in the curvature of the optical interface; and an electrode portion which generates an electric field for varying positions of the first driving interface and the second driving surface, wherein the at least one sub-channel adjusts the curvature of the optical interface by one amount and the at least one main channel adjusts the curvature of the optical interface by another amount which is greater than the one amount, and the first interface and the second interface are different from one another and from the optical interface.