Electrophoretic display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9664977-B2
Application number	US-201313954403-A
Country	US
Kind code	B2
Filing date	Jul 30, 2013
Priority date	Feb 10, 2011
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

Disclosed is an electrophoretic display device manufacturing method including bonding a substrate including a pixel electrode and a stacked film including a transparent electrode layer and an electrophoretic display layer, and forming a color filter layer having a pixel pattern corresponding to a pattern of the pixel electrode above a base material surface of the stacked film. The substrate has a region where the electrophoretic display layer is not arranged when the substrate and the stacked film are bonded, a pixel alignment pattern is drawn in the region, and in the forming the color filter layer, the color filter layer is formed while performing alignment using the pixel alignment pattern.

First claim

What is claimed is:

1. An electrophoretic display device manufacturing method comprising:
preparing a substrate including a pixel electrode;
preparing a stacked film including, above a transparent base material, a transparent electrode layer and an electrophoretic display layer in which microcapsules encapsulating a dispersion formed by dispersing electrophoretic particles in a dispersion medium are fixed by a binder resin, wherein the transparent electrode layer and the electrophoretic display layer are disposed sequentially from the transparent base material;
bonding the substrate and the stacked film so as to join the pixel electrode and the electrophoretic display layer;
forming a receptor layer on the transparent base material surface of the stacked film; and
forming a color filter layer in the receptor layer, the color filter layer having a pixel pattern corresponding to a pattern of the pixel electrode on the transparent base material surface of the stacked film, the forming the color filter layer being performed by discharging ink into portions of the receptor layer by inkjet printing such that the color filter layer is formed from the portions of the receptor layer absorbing the discharged ink, wherein
the substrate has a region where the electrophoretic display layer is not arranged when the substrate and the stacked film are bonded, a pixel alignment pattern is drawn in the region, and
in the forming the color filter layer, the color filter layer is formed while performing alignment using the pixel alignment pattern.

2. The electrophoretic display device manufacturing method according to claim 1 , wherein in the preparing the stacked film, the receptor layer is formed above the base material surface of the stacked film.

3. The electrophoretic display device manufacturing method according to claim 1 , further comprising forming the receptor layer above the base material surface of the stacked film after the bonding the substrate and the stacked film.

4. The electrophoretic display device manufacturing method according to claim 1 , wherein the bonding the substrate and the stacked film is performed using an adhesive by applying a pressure.

5. The electrophoretic display device manufacturing method according to claim 1 , further comprising stacking a protective film above the color filter layer after forming the color filter layer.

6. The electrophoretic display device manufacturing method according to claim 1 , further comprising sealing a joint end between the pixel electrode and the electrophoretic display layer by a resin after forming the color filter layer.

7. The electrophoretic display device manufacturing method according to claim 1 , wherein a thickness of the transparent base material falls within a range of 10 μm (inclusive) to 100 μm (inclusive).

8. An electrophoretic display device comprising:
a substrate;
a pixel electrode formed above the substrate;
an electrophoretic display layer arranged above the pixel electrode and formed by fixing, by a binder resin, microcapsules encapsulating a dispersion formed by dispersing electro-migrating particles in a dispersion medium;
a transparent electrode layer provided above the electrophoretic display layer;
a transparent base material provided above the transparent electrode layer;
a receptor layer formed above the transparent base material; and
a color filter layer formed in the receptor layer, the color filter layer being on the transparent base material and comprised of portions of the receptor layer colored by ink absorbed by and fixed in the portions of the receptor layer,
wherein the substrate has a region where the electrophoretic display layer is not arranged, and a pixel alignment pattern is drawn in the region.

9. The electrophoretic display device according to claim 8 , further comprising a protective film above the color filter layer.

10. The electrophoretic display device according to claim 8 , wherein a joint end between the pixel electrode and the electrophoretic display layer is sealed by a resin.

11. The electrophoretic display device according to claim 8 , wherein a thickness of the transparent base material falls within a range of 10 μm (inclusive) to 100 μm (inclusive).

12. The electrophoretic display device according to claim 8 , wherein
the color filter layer includes colored pixel regions having a color combination selected from red, green, and blue, and yellow, magenta, and cyan, and
the colored pixel regions includes respectively colored ink fixed in the receptor layer.

13. The electrophoretic display device according to claim 12 , wherein no black matrix is formed in, or partitioning pixels of, the color filter layer.

Assignees

• Toppan Printing Co Ltd

Inventors

• Doi Ryuji
• Emori Akira
• Shoji Kayo

Classifications

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/133516 Primary

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title

• G02F2201/123

  pixel · CPC title

• G02F1/1339

  Gaskets; Spacers; Sealing of cells · CPC title

• G02F1/1681

  having two or more microcells partitioned by walls, e.g. of microcup type · CPC title