Electronic paper

• US 8,144,389 B2
• Filed: 01/07/2011
• Issued: 03/27/2012
• Est. Priority Date: 07/10/2008
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Eguchi, Shingo, MASHIYAMA, Mitsuo, KATANIWA, Masatoshi, Shoji, Hironobu, Nakada, Masataka, Oikawa, Yoshiaki
• Primary Examiner(s): Pinkney, DaWayne A
• Application Number:
  US12/986,443
• Publication Number:
  US 20110095298A1
• Time in Patent Office: 445 Days
• Field of Search: 359/296, 349/33, 345/49, 345/105, 345/107, 430 31- 32, 204/450, 204/600, 250/70, 250/208.1, 438/929
• US Class Current: 359/296
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/16755 Substrates
• CPC Class Codes: G02F 1/16757 Microcapsules
• CPC Class Codes: G02F 1/1679 Gaskets; Spacers; Sealing of cells; Filling or closing of cells
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2201/503 Arrangements improving the resistance to shock
• CPC Class Codes: G02F 2202/22 Antistatic materials or arrangements

Abstract

An object of the present invention is to increase the resistance of electronic paper to external stress. The resistance to external stress is increased by providing an element formation layer, which includes an integrated circuit portion, a first electrode, a second electrode, and a charged particle-containing layer, between a first insulating film including a first structure body in which a first fibrous body is impregnated with a first organic resin, and a second insulating film including a second structure body in which a second fibrous body is impregnated with a second organic resin.

Claims

1. A display device comprising:

a first insulating film and a second insulating film facing each other; and

an element formation layer provided between the first insulating film and the second insulating film,

wherein the element formation layer comprises a thin film transistor comprising an oxide semiconductor,

wherein the first insulating film comprises a first structure body in which a first fibrous body is impregnated with a first organic resin, and

wherein the second insulating film comprises a second structure body in which a second fibrous body is impregnated with a second organic resin.

2. The display device according to claim 1, wherein the first organic resin and the second organic resin are bonded to each other at edges of the first insulating film and the second insulating film.

3. The display device according to claim 1, further comprising a conductive film provided on at least one of a surface of the first insulating film and a surface of the second insulating film.

4. The display device according to claim 1 further comprising:

a first conductive film provided on a surface of the first insulating film; and

a second conductive film is provided on a surface of the second insulating film,

wherein the first conductive film and the second conductive film are electrically connected to each other.

5. The display device according to claim 1, wherein the first insulating film and the second insulating film are symmetrically disposed with respect to the element formation layer.

6. The display device according to claim 1 further comprising at least one barrier layer provided between the element formation layer and the first insulating film and/or between the element formation layer and the second insulating film.

7. The display device according to claim 1 further comprising a depressed portion provided in the first organic resin or the second organic resin in a region where the first organic resin and the second organic resin are bonded to each other.

8. The display device according to claim 1, wherein each of the first organic resin and the second organic resin is a thermosetting resin or a thermoplastic resin.

9. The display device according to claim 1, wherein each of the first fibrous body and the second fibrous body comprises one of a polyvinyl alcohol fiber, a polyester fiber, a polyamide fiber, a polyethylene fiber, an aramid fiber, a polyparaphenylene benzobisoxazole fiber, a glass fiber, and a carbon fiber.

10. The display device according to claim 1, wherein the element formation layer further comprises a first electrode electrically connected to the thin film transistor, a second electrode facing the first electrode, and a charged particle-containing layer provided between the first electrode and the second electrode.

11. A display device comprising:

a first insulating film and a second insulating film facing each other; and

an element formation layer provided between the first insulating film and the second insulating film,

wherein the element formation layer comprises a thin film transistor comprising an oxide semiconductor,

wherein the first insulating film comprises a first structure body in which a first fibrous body is impregnated with a first organic resin, and a first protective film having a modulus of elasticity lower than that of the first structure body, and

wherein the second insulating film comprises a second structure body in which a second fibrous body is impregnated with a second organic resin, and a second protective film having a modulus of elasticity lower than that of the second structure body.

12. The display device according to claim 11, wherein the first organic resin and the second organic resin are bonded to each other at edges of the first insulating film and the second insulating film.

13. The display device according to claim 11 further comprising a conductive film on at least one of a surface of the first insulating film and a surface of the second insulating film.

14. The display device according to claim 11 further comprising:

a first conductive film on a surface of the first insulating film; and

a second conductive film on a surface of the second insulating film,

wherein the first conductive film and the second conductive film are electrically connected to each other.

15. The display device according to claim 11, wherein the first insulating film and the second insulating film are symmetrically disposed with respect to the element formation layer.

16. The display device according to claim 11 further comprising at least one barrier layer provided between the element formation layer and the first insulating film, and/or between the element formation layer and the second insulating film.

17. The display device according to claim 11 further comprising a depressed portion provided in the first organic resin or the second organic resin in a region where the first organic resin and the second organic resin are bonded to each other.

18. The display device according to claim 11, wherein each of the first organic resin and the second organic resin is a thermosetting resin or a thermoplastic resin.

19. The display device according to claim 11, wherein each of the first fibrous body and the second fibrous body comprises one of a polyvinyl alcohol fiber, a polyester fiber, a polyamide fiber, a polyethylene fiber, an aramid fiber, a polyparaphenylene benzobisoxazole fiber, a glass fiber, and a carbon fiber.

20. The display device according to claim 11, wherein the element formation layer further comprises a first electrode electrically connected to the thin film transistor, a second electrode facing the first electrode, and a charged particle-containing layer provided between the first electrode and the second electrode.

21. An electronic paper comprising:

a first insulating film comprising a first structure body in which a first fibrous body is impregnated with a first organic resin;

an element formation layer provided over the first insulating film; and

a second insulating film provided over the element formation layer, the second insulating film comprising a second structure body in which a second fibrous body is impregnated with a second organic resin,

wherein the element formation layer comprises a thin film transistor comprising an oxide semiconductor.

22. The electronic paper according to claim 21, wherein the first organic resin and the second organic resin are bonded to each other at edges of the first insulating film and the second insulating film.

23. The electronic paper according to claim 21, further comprising a conductive film provided on at least one of a surface of the first insulating film and a surface of the second insulating film.

24. The electronic paper according to claim 21 further comprising:

a first conductive film provided on a surface of the first insulating film; and

a second conductive film is provided on a surface of the second insulating film,

wherein the first conductive film and the second conductive film are electrically connected to each other.

25. The electronic paper according to claim 21, wherein the first insulating film and the second insulating film are symmetrically disposed with respect to the element formation layer.

26. The electronic paper according to claim 21 further comprising at least one barrier layer provided between the element formation layer and the first insulating film and/or between the element formation layer and the second insulating film.

27. The electronic paper according to claim 21 further comprising a depressed portion provided in the first organic resin or the second organic resin in a region where the first organic resin and the second organic resin are bonded to each other.

28. The electronic paper according to claim 21, wherein each of the first organic resin and the second organic resin is a thermosetting resin or a thermoplastic resin.

29. The electronic paper according to claim 21, wherein each of the first fibrous body and the second fibrous body comprises one of a polyvinyl alcohol fiber, a polyester fiber, a polyamide fiber, a polyethylene fiber, an aramid fiber, a polyparaphenylene benzobisoxazole fiber, a glass fiber, and a carbon fiber.

30. The electronic paper according to claim 21, wherein the element formation layer further comprises a first electrode electrically connected to the thin film transistor, a second electrode facing the first electrode, and a charged particle-containing layer provided between the first electrode and the second electrode.

31. An electronic paper comprising:

a first insulating film;

an element formation layer provided over the first insulating film; and

a second insulating film provided over the element formation layer,

wherein the element formation layer comprises a thin film transistor comprising an oxide semiconductor,

wherein the first insulating film comprises a first structure body in which a first fibrous body is impregnated with a first organic resin, and a first protective film having a modulus of elasticity lower than that of the first structure body, and

wherein the second insulating film comprises a second structure body in which a second fibrous body is impregnated with a second organic resin, and a second protective film having a modulus of elasticity lower than that of the second structure body.

32. The electronic paper according to claim 31, wherein the first organic resin and the second organic resin are bonded to each other at edges of the first insulating film and the second insulating film.

33. The electronic paper according to claim 31 further comprising a conductive film on at least one of a surface of the first insulating film and a surface of the second insulating film.

34. The electronic paper according to claim 31 further comprising:

a first conductive film on a surface of the first insulating film; and

a second conductive film on a surface of the second insulating film,

wherein the first conductive film and the second conductive film are electrically connected to each other.

35. The electronic paper according to claim 31, wherein the first insulating film and the second insulating film are symmetrically disposed with respect to the element formation layer.

36. The electronic paper according to claim 31 further comprising at least one barrier layer provided between the element formation layer and the first insulating film, and/or between the element formation layer and the second insulating film.

37. The electronic paper according to claim 31 further comprising a depressed portion provided in the first organic resin or the second organic resin in a region where the first organic resin and the second organic resin are bonded to each other.

38. The electronic paper according to claim 31, wherein each of the first organic resin and the second organic resin is a thermosetting resin or a thermoplastic resin.

39. The electronic paper according to claim 31, wherein each of the first fibrous body and the second fibrous body comprises one of a polyvinyl alcohol fiber, a polyester fiber, a polyamide fiber, a polyethylene fiber, an aramid fiber, a polyparaphenylene benzobisoxazole fiber, a glass fiber, and a carbon fiber.

40. The electronic paper according to claim 31, wherein the element formation layer further comprises a first electrode electrically connected to the thin film transistor, a second electrode facing the first electrode, and a charged particle-containing layer provided between the first electrode and the second electrode.