Highlight color display architecture using enhanced dark state

摘要

The present invention is directed to a highlight color display. One of the key features of the invention is the dark color of the display fluid filled in the microcups, which allows the dark state to appear black. There is no alignment required between the pixel electrodes and the microcups. In practice, a standard active matrix array may be used to drive the display device.

主权项

1. A color display device comprising
A) a plurality of microcups, wherein a) said microcups are separated by transparent partition walls, b) said microcups are filled with a display fluid comprising white charged pigment particles dispersed in a solvent of a dark color, and the solvent is of the same color in all the microcups, and c) said microcups are sandwiched between a first layer and a second layer wherein said first layer comprises a common electrode and is on a viewing side and said second layer comprises a plurality of pixel electrodes, and B) an adhesive layer on the opposite side of the viewing side and the adhesive layer has a black color or a color complementary to the dark color of the solvent, whereby each area corresponding to a pixel electrode displays a white color state when the white charged pigment particles are driven to be near or at the common electrode, displays a black color state when the white charged pigment particles are driven to be near or at the pixel electrode to cover the pixel electrode, wherein the black color state is the dark color of the solvent enhanced by the color of the adhesive layer seen through the transparent partition walls, and displays a medium color state of the solvent when the white charged pigment particles are driven to an area between the common and pixel electrodes.