Electrophoretic display having charged fluorescent dendrimer particles
AssigneeEmpire Technology Development LLC
InventorJosef Peter KLEIN
Life of this patent
Estimating the term…
Abstract
Electrophoretic displays with an electrophoretic medium having charged fluorescent particles are disclosed. The charged fluorescent particles have a dendrimer core covalently bonded with fluorophores of various emissive wavelengths so that microparticles that emit a variety of different colored electromagnetic radiation may be produced. Methods for producing the microparticles and using the microparticles in an electrophoretic display are also disclosed. Such microparticles may be provided separately, or kits may be provided for producing the microparticles.
Claims38
An electrophoretic display comprising:
- at least one first electrode layer configured to selectively apply an electric field;
- and
- an electrophoretic medium disposed adjacent to the at least one first electrode layer, wherein the electrophoretic medium comprises:
- a fluid having a first color;
- and
- at least one electrically charged particle disposed in the fluid, wherein the at least one electrically charged particle is configured to move in the fluid when the electrical field is applied,
- wherein the at least one charged particle comprises a charged fluorescent dendrimer configured to emit a second color different from the first color of the fluid.
-6. (canceled)
(canceled)
-13. (canceled)
(canceled)
(canceled)
-24. (canceled)
-104. (canceled)
A method for producing a charged fluorescent particle, the method comprising:
- reacting a charged fluorophore with a dendrimer,
- wherein the fluorophore comprises at least one amine-reactive carbonyl group selected from the group consisting of:
- aldehyde, ketone, carboxylic acid, ester, acyl halide, anhydride, and combinations thereof, and
- the dendrimer comprises at least one surface reactive amine, and
- wherein the at least one surface reactive amine of the dendrimer reacts with the at least one amine-reactive carbonyl group of the fluorophore to covalently bond the dendrimer with the fluorophore to form the charged fluorescent particle.
(canceled)
-118. (canceled)
Dependencies are inferred from the claim text.