Pigment particles for electrophoretic display
AssigneeSiPix Imaging, Inc.
InventorsHui Du, Xiaojia Wang, HongMei Zang, Haiyan Gu
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Abstract
The present invention is directed to an electrophoretic display fluid, in particular, pigment particles dispersed in a solvent or solvent mixture, and methods for their preparation. The pigment particles generated, according to the present invention, are stable in solvent under an electric field, have desired charge and charge density on the particle surface.
Claims31
A pigment particle suitable for an electrophoretic display, comprising:
- a) long-chain polymer stabilizers attached to the surface of the pigment particle;
- and
- b) a charge generating element, wherein the charge generating element is a charge controlling agent which is inserted between the long-chain polymer stabilizers and attached directly to the exposed surface of the pigment particle.
A pigment particle suitable for an electrophoretic display, comprising:
- a) long-chain polymer stabilizers attached to the surface of the pigment particle;
- b) a charge generating element;
- and
- c) short-chain molecules with a functional moiety bonded to the surface of the pigment particle, and the charge generating element is a charge controlling agent which interacts with the short-chain molecules.
A pigment particle suitable for an electrophoretic display, comprising:
- a) long-chain polymer stabilizers attached to the surface of the pigment particle;
- and
- b) a charge generating element, wherein said long-chain polymer stabilizer comprises a side chain, and the charge generating element is a charge controlling agent which interacts with the side chains of said long-chain polymer stabilizers.
A pigment particle suitable for an electrophoretic display, comprising:
- a) long-chain polymer stabilizers attached to the surface of the pigment particle;
- and
- b) a charge generating element, wherein the charge generating element is a molecule with a charging group directly coupled to the surface of the pigment particle.
A pigment particle suitable for an electrophoretic display comprising:
- a) long-chain polymer stabilizers attached to the surface of the pigment particle;
- and
- b) a charge generating element, wherein said long-chain polymer stabilizers are long-chain polymers and the charge generating element is a charge controlling agent with a polar head or a charged functional group inserted into the long-chain polymers.
Dependencies are inferred from the claim text.