Patent ID: 8547623

Claim:
A dual-mode electrowetting display device, comprising: a plurality of electrowetting pixels each configured to operate selectively in a bistable mode and a fast-switching analogue mode, wherein the display device includes: a transparent upper substrate representing a face of the display device, and a lower substrate; the electrowetting pixels each including a middle substrate which acts as a separator between two layers of electrowetting fluids, wherein one of which exists above the middle substrate and below the upper substrate and the other of which exists below the middle substrate and above the lower substrate, and at least one fluid channel which permits the electrowetting fluids to move between the layers, and wherein the middle substrate is configured to obscure the layer of electrowetting fluids which exists between the middle substrate and the lower substrate from an observer viewing the face of the display device; and the display device further including a driver circuit configured to control an appearance of each pixel in the bistable mode and the fast-switching analogue mode by controlling positions of the electrowetting fluids within the two layers.