Electrophoresis display device and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9958752-B2
Application number	US-201615207854-A
Country	US
Kind code	B2
Filing date	Jul 12, 2016
Priority date	Jul 29, 2015
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

An electrophoresis display device includes an element substrate (first substrate); a counter substrate (second substrate) arranged facing the element substrate; an electrophoresis layer arranged between the element substrate and the counter substrate and which includes a dispersion liquid which contains electrophoretic particles and a dispersion medium in which the electrophoretic particles are dispersed; a dividing wall arranged to partition the electrophoresis layer into a plurality of cells; and a sealing layer arranged between the counter substrate and the dividing wall. The sealing layer has a modulus of elasticity at 25° C. of 1 MPa or more to 100 MPa or less.

First claim

What is claimed is:

1. An electrophoresis display device, comprising:
a first substrate;
a second substrate arranged facing the first substrate;
an electrophoresis layer arranged between the first substrate and the second substrate and which includes a dispersion liquid that contains electrophoretic particles and a dispersion medium;
a dividing wall arranged to partition the electrophoresis layer into a plurality of cells; and
a sealing layer arranged between the second substrate and the dividing wall,
wherein the sealing layer has a modulus of elasticity at 25° C. of 1 MPa or more to 100 MPa or less, and
wherein a surface of the sealing layer which is in contact with the dividing wall and pressed by the dividing wall is positioned closer to a second substrate side in a cross-sectional view of the electrophoresis display device than a surface of the sealing layer which is in contact with the electrophoresis layer.

2. The electrophoresis display device according to claim 1 ,
wherein the sealing layer has an average film thickness of ⅕ or more of the average film thickness of the electrophoresis layer.

3. The electrophoresis display device according to claim 1 ,
wherein the sealing layer has a lower volume resistivity than the volume resistivity of the dispersion liquid.

4. The electrophoresis display device according to claim 1 ,
wherein the sealing layer is a stacked body that includes a first sealing layer positioned on the second substrate side and a second sealing layer positioned on the electrophoresis layer side.

5. The electrophoresis display device according to claim 4 ,
wherein the first sealing layer has a modulus of elasticity at 25° C. of 5 MPa or more to 40 MPa or less.

6. The electrophoresis display device according to claim 4 ,
wherein the second sealing layer has a modulus of elasticity at 25° C. of 50 MPa or more to 10 GPa or less.

7. The electrophoresis display device according to claim 4 ,
wherein the first sealing layer has an average film thickness of 2.5 μm or more to 20 μm or less.

8. The electrophoresis display device according to claim 4 ,
wherein the second sealing layer has an average film thickness of 0.05 μm or more to 1.0 μm or less.

9. The electrophoresis display device according to claim 4 ,
wherein the first sealing layer has a volume resistivity of 1×10 7 Ω·cm or more to 5×10 10 Ω·cm or less.

10. The electrophoresis display device according to claim 4 ,
wherein the second sealing layer has a volume resistivity of 1×10 7 Ω·cm or more to 2×10 11 Ω·cm or less.

11. An electronic apparatus, comprising:
the electrophoresis display device according to claim 1 .

12. An electronic apparatus, comprising:
the electrophoresis display device according to claim 2 .

13. An electronic apparatus, comprising:
the electrophoresis display device according to claim 3 .

14. An electronic apparatus, comprising:
the electrophoresis display device according to claim 4 .

15. An electronic apparatus, comprising:
the electrophoresis display device according to claim 5 .

16. An electronic apparatus, comprising:
the electrophoresis display device according to claim 6 .

17. An electronic apparatus, comprising:
the electrophoresis display device according to claim 7 .

18. An electronic apparatus, comprising:
the electrophoresis display device according to claim 8 .

Assignees

• Seiko Epson Corp

Inventors

• Yamada Tadashi
• Nakamura Kiyoshi
• Hirabayashi Saichi
• Nagae Nobukazu
• Katakabe Toru

Classifications

• G02F1/167 Primary

  by electrophoresis · CPC title

• G02F1/1339

  Gaskets; Spacers; Sealing of cells · CPC title

• G02F2001/1672

  Physics · mapped topic

• G02F1/1679

  Gaskets; Spacers; Sealing of cells; Filling or closing of cells · CPC title

• G02F1/1681

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