Color display devices
First Claim
1. A display device comprising a plurality of display cells, wherein each of said display cells is(a) filled with an electrophoretic fluid comprising a first type of pigment particles of a first color and a second type of pigment particles of a second color, both of which are dispersed in a solvent or solvent mixture of a third color,(b) sandwiched between a first layer comprising only one common electrode and a second layer comprising a plurality of driving electrodes, among which at least one driving electrode is a non-transparent designated driving electrode and the remaining driving electrodes are transparent non-designated driving electrodes, wherein the two types of pigment particles are capable of being driven to the first layer, to the second layer, and to the at least one non-transparent designated driving electrode, and(c) operable for displaying at least four color states when the display cell is viewed through the second layer, wherein the pigment particles which gathered at the at least one non-transparent designated driving electrode are hidden and are not visible from the viewing side.
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention is directed to color display devices which are capable of displaying multiple color states. The display device comprises a plurality of display cells, wherein each of said display cells is (a) sandwiched between a first layer comprising a common electrode and a second layer comprising a plurality of driving electrodes, wherein at least one of the driving electrodes is a designated electrode, (b) filled with an electrophoretic fluid comprising at least two types of pigment particles dispersed in a solvent or solvent mixture, and (c) capable of displaying at least four color states. The display device may also comprise hiding layers or a brightness enhancement structure on the viewing side.
136 Citations
12 Claims
-
1. A display device comprising a plurality of display cells, wherein each of said display cells is
(a) filled with an electrophoretic fluid comprising a first type of pigment particles of a first color and a second type of pigment particles of a second color, both of which are dispersed in a solvent or solvent mixture of a third color, (b) sandwiched between a first layer comprising only one common electrode and a second layer comprising a plurality of driving electrodes, among which at least one driving electrode is a non-transparent designated driving electrode and the remaining driving electrodes are transparent non-designated driving electrodes, wherein the two types of pigment particles are capable of being driven to the first layer, to the second layer, and to the at least one non-transparent designated driving electrode, and (c) operable for displaying at least four color states when the display cell is viewed through the second layer, wherein the pigment particles which gathered at the at least one non-transparent designated driving electrode are hidden and are not visible from the viewing side.
Specification