METHOD OF MANUFACTURING CHARGED PARTICLE, CHARGED PARTICLE, ELECTROPHORETIC DISPERSION LIQUID, ELECTROPHORETIC SHEET, ELECTROPHORETIC DEVICE AND ELECTRONIC EQUIPMENT

Abstract

A method of manufacturing a charged particle, comprising: a) providing a mother particle; and b) forming a coating layer that covers at least a part of a surface of the mother particle wherein the step b) includes: coupling a first chemical compound having at least a part where is going to be a starting point of living polymerization to the surface of the mother particle; and polymerizing a second chemical compound having an ionic group or a functional group convertible to an ionic group so as to form a polymer through the living polymerization that starts from the starting point of the first chemical compound.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements.

FIG. 1 is a longitudinal sectional view of a charged particle according to a first embodiment of the invention.

FIG. 2 schematically shows a polymeric structure which the charged particle shown in FIG. 1 has.

FIG. 3 is a schematic diagram showing an example of the polymer shown in FIG. 2.

FIG. 4 is a schematic diagram for explaining a manufacturing method of the charged particle shown in FIG. 3.

FIG. 5 schematically shows a polymeric structure which a charged particle according to a second embodiment of the invention has.

FIG. 6 is a schematic diagram showing an example of the polymer shown in FIG. 5.

FIG. 7 is a schematic diagram for explaining a manufacturing method of the charged particle shown in FIG. 6.

FIG. 8 is a longitudinal sectional view of a charged particle according to a third embodiment of the invention.

FIG. 9 schematically shows a polymeric structure which the charged particle shown in FIG. 8 has.

FIG. 10 is a schematic diagram showing an example of the polymer shown in FIG. 9.

FIG. 11 is a schematic diagram for explaining a manufacturing method of the charged particle shown in FIG. 10.

FIG. 12 is a longitudinal sectional view schematically showing an embodiment of an electrophoretic display device.

FIG. 13 schematically shows an operation mechanism of the electrophoretic display device shown in FIG. 12.

FIG. 14 is a perspective view of an electronic paper as an embodiment of electronic equipment of the invention.

FIG. 15 is a perspective view of a display device as an embodiment of electronic equipment of the invention.

Claims

1. A method of manufacturing a charged particle, comprising: a) providing a mother particle; andb) forming a coating layer that covers at least a part of a surface of the mother particle,wherein the step b) includes:coupling a first chemical compound having at least a part where is going to be a starting point of a living polymerization to the surface of the mother particle; andpolymerizing a second chemical compound having an ionic group or a functional group convertible to an ionic group so as to form a polymer through the living polymerization that starts from the starting point of the first chemical compound.

2. A method of manufacturing a charged particle, comprising: a) providing a mother particle; andb) forming a coating layer that covers at least a part of a surface of the mother particle,wherein the step b) includes:coupling a first chemical compound having at least a part where is going to be a starting point of a living polymerization to the surface of the mother particle;polymerizing a second chemical compound so as to form a polymer through the living polymerization that starts from the starting point of the first chemical compound; andconverting at least a part of the polymer to an ionic group.

3. A method of manufacturing a charged particle, comprising: a) providing a mother particle; andb) forming a coating layer that covers at least a part of a surface of the mother particle,wherein the step b) includes:coupling a first chemical compound having at least a part where is going to be a starting point of a living polymerization to the surface of the mother particle;polymerizing a second chemical compound so as to form a polymer through the living polymerization that starts from the starting point of the first chemical compound;either converting at least a part of the polymer to an ionic precursor group that is convertible to an ionic group or introducing an ionic precursor group into the polymer; andconverting the ionic precursor group to an ionic group.

4. The method of manufacturing a charged particle according to claim 1, wherein the second chemical compound has a chromophore.

5. The method of manufacturing a charged particle according to claim 1, wherein a catalyst mainly made of a transition metal halide is used in the living polymerization.

6. A charged particle, comprising: a mother particle; anda coating layer covering at least a part of the mother particle, the coating layer including a polymer whose one end of a main chain is coupled to a surface of the mother particle, and the polymer having ionic groups at its side chains ramified from the main chain.

7. A charged particle, comprising: a mother particle; anda coating layer covering at least a part of the mother particle, the coating layer including a polymer whose one end of a main chain is coupled to a surface of the mother particle, and the polymer having at least one chromophore and an ionic group at the other end of the main chain.

8. The charged particle according to claim 7, wherein the polymer has the chromophore at its side chain ramified from the main chain.

9. Electrophoretic dispersion liquid, comprising: a liquid; andthe charged particle according to claim 6 dispersed in the liquid and the charged particle migrating where an electric field is applied.

10. An electrophoretic sheet, comprising: a substrate; anda plurality of structures that enclose the electrophoretic dispersion liquid according to claim 9.

11. An electrophoretic device, comprising the electrophoretic sheet according to claim 10.

12. Electronic equipment comprising the electrophoretic device according to claim 11.