Patent ID: 8508436

Claim:
A light-modulating device, comprising: a substrate; color filters provided on the substrate, the color filters having different colors from each other; a hydrophobic layer on the substrate; a droplet of a first fluid disposed on the hydrophobic layer, the first fluid having polarity or electric conductivity; a second fluid surrounding the droplet and being immiscible with the first fluid; and a first resistance electrode disposed under the droplet and configured to apply a first electric field to the droplet, the first electric field varying in intensity in a first direction; and a second resistance electrode disposed above the droplet, directly facing the first electrode, and configured to apply a second electric field to the droplet, the second electric field varying in intensity in a second direction different from the first direction, wherein the device is configured to modulate the shape or location of the droplet so as to selectively cover a corresponding one of the color filters.