Electrowetting Display Pixel Architecture

摘要

The subject matter disclosed herein relates to reduction of effective voltage drops within pixels in active matrix displays such as electrowetting display devices. The electrowetting display device comprises a plurality of pixel areas, wherein each pixel area comprises a hydrophobic surface, a first fluid and a second fluid on the hydrophobic surface, wherein the first fluid is immiscible with the second fluid, and a pixel electrode under the hydrophobic surface, wherein the pixel electrode has a substantially U-shape. A thin film transistor is coupled to the pixel electrode and a voltage source. Voltage via the thin film transistor and the voltage source applied to the hydrophobic surface via the pixel electrode causes the hydrophobic surface to become more hydrophobilic to thereby move the second fluid onto the hydrophobic surface to thereby substantially displace the first fluid on the hydrophobic surface.

主权项

1. An electrowetting display device comprising a plurality of pixel areas, wherein each pixel area comprises:
a hydrophobic surface; an electrowetting oil on the hydrophobic surface and a fluid that includes an electrolyte on the electrowetting oil; a pixel electrode under the hydrophobic surface, wherein the pixel electrode has a substantially U-shape with respect to the pixel area, wherein the U-shape is defined by a first arm having a first width, a second arm defined by a second width and a base portion defined by a height, and wherein the first width and the second width are in a range of 0.02-0.2 a width W of the pixel electrode and the height is in a range of 0.02-0.2 the width W of the pixel electrode; and a thin film transistor coupled to the pixel electrode and a voltage source, wherein voltage via the thin film transistor and the voltage source applied to the hydrophobic surface via the pixel electrode causes the hydrophobic surface to become more hydrophobilic to thereby move the fluid that includes the electrolyte onto the hydrophobic surface to thereby substantially displace the electrowetting oil on the hydrophobic surface.