SUBSTRATE HAVING FLUID DAM ADAPTED FOR USE AN ELECTRO WETTING DISPLAY DEVICE

摘要

An electrowetting display device includes a first substrate comprising a wall pattern surrounding a pixel electrode disposed in a display area of the first substrate, a spaced apart second substrate comprising a common electrode and a dam member disposed in a peripheral area surrounding the display area. The dam member has sealable openings (a.k.a. sealable dam spillways) through which there is discharged an excess portion of an excessively supplied wetting layer, the discharge of the excess occurring while the first and second substrates are brought together about top and bottom portions of a sealing ring that seals them together.

主权项

1. An electrowetting display device comprising:
a first substrate including a wall maintaining pattern forming a liquid-retaining cavity surrounding a pixel electrode disposed in a display area of the first substrate, the wall maintaining pattern also defining spacers that keep the first substrate spaced apart from an overlying structure by a predetermined gap distance; a dam member disposed in a peripheral area of at least one of the first and second substrates, the peripheral area surrounding the display area, where the dam member defines one or more sealable openings extending therethrough; a second substrate including a common electrode disposed for creating an electric field with the pixel-electrode of the first substrate, the second substrate being part of the overlying structure that is spaced apart from the first substrate; a sealant disposed in the peripheral area and filling the sealable openings of the dam member; and a wetting fluid layer disposed between the first and second substrates, the wetting fluid layer comprising a nonpolar first fluid layer and a polar second fluid layer.