Display device

• US 8,319,725 B2
• Filed: 04/28/2010
• Issued: 11/27/2012
• Est. Priority Date: 05/02/2009
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Okamoto, Satohiro, Arai, Yasuyuki, Kawamata, Ikuko, Miyaguchi, Atsushi, Moriya, Yoshitaka
• Primary Examiner(s): Nguyen, Kevin M
• Application Number:
  US12/769,298
• Publication Number:
  US 20100277448A1
• Time in Patent Office: 944 Days
• Field of Search: 345/107
• US Class Current: 345/107
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G09G 2300/0421 Structural details of the set of electrodes
• CPC Class Codes: G09G 2300/0478 related to liquid crystal pixels
• CPC Class Codes: G09G 3/2096 Details of the interface to the display terminal specific for a flat panel suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/39 Control of the bit-mapped memory
• CPC Class Codes: H01L 27/1218 with a particular composition or structure of the substrate
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 2201/10128 Display

Abstract

The display device includes: a flexible display panel including a display portion in which scanning lines and signal lines cross each other; a supporting portion for supporting an end portion of the flexible display panel; a signal line driver circuit for outputting a signal to the signal line, which is provided for the supporting portion; and a scanning line driver circuit for outputting a signal to the scanning line, which is provided for a flexible surface of the display panel in a direction which is perpendicular or substantially perpendicular to the supporting portion.

Claims

1. A display device comprising:

a flexible display panel comprising a display portion including a scanning line and a signal line;

a supporting portion for supporting an end portion of the flexible display panel;

a signal line driver circuit for outputting a signal to the signal line, the signal line driver circuit provided in the supporting portion; and

a scanning line driver circuit for outputting a signal to the scanning line, the scanning line driver circuit provided along an edge portion of the flexible display panel in a direction which is perpendicular or substantially perpendicular to the supporting portion.

4. The display device according to claim 1, further comprising a groove for providing a stress concentration region between the display portion and the supporting portion.

7. The display device according to claim 1,

wherein the signal line driver circuit comprises a plurality of circuit portions, and

wherein the plurality of circuit portions are spaced from each other.

10. The display device according to claim 1,

wherein the signal line driver circuit comprises a transistor, and

wherein the transistor comprises a single crystal semiconductor.

13. The display device according to claim 1,

wherein the scanning line driver circuit comprises a transistor, and

wherein the transistor comprises a non-single crystal semiconductor.

16. The display device according to claim 1,

wherein the scanning line driver circuit comprises a transistor, and

wherein the transistor comprises an oxide semiconductor.

19. The display device according to claim 1,

wherein the signal line driver circuit comprises a first transistor,

wherein the scanning line driver circuit comprises a second transistor, and

wherein a structure of the first transistor is different from a structure of the second transistor.

22. The display device according to claim 1,

wherein the display portion comprises a first transistor,

wherein the scanning line driver circuit comprises a second transistor, and

wherein a channel layer of the first transistor and a channel layer of the second transistor comprise the same material.

25. The display device according to claim 1, further comprising a reinforce plate overlapped with the scanning line driver circuit.

29. The display device according to claim 1, wherein the supporting portion comprises at least one of a battery, an antenna, a CPU, and a memory.

2. A display device comprising:

a flexible display panel comprising a display portion including a scanning line and a signal line;

a supporting portion for supporting an end portion of the flexible display panel;

a signal line driver circuit for outputting a signal to the signal line, the signal line driver circuit provided in the supporting portion; and

a scanning line driver circuit comprising a first circuit portion and a second circuit portion each for outputting a signal to the scanning line, the first circuit portion and the second circuit portion provided along an edge portion of the flexible display panel in a direction which is perpendicular or substantially perpendicular to the supporting portion,

wherein the first circuit portion and the second circuit portion are spaced from each other.

5. The display device according to claim 2, further comprising a groove for providing a stress concentration region between the display portion and the supporting portion.

8. The display device according to claim 2,

wherein the signal line driver circuit comprises a plurality of circuit portions, and

wherein the plurality of circuit portions are spaced from each other.

11. The display device according to claim 2,

wherein the signal line driver circuit comprises a transistor, and

wherein the transistor comprises a single crystal semiconductor.

14. The display device according to claim 2,

wherein the scanning line driver circuit comprises a transistor, and

wherein the transistor comprises a non-single crystal semiconductor.

17. The display device according to claim 2,

wherein the scanning line driver circuit comprises a transistor, and

wherein the transistor comprises an oxide semiconductor.

20. The display device according to claim 2,

wherein the signal line driver circuit comprises a first transistor,

wherein the scanning line driver circuit comprises a second transistor, and

wherein a structure of the first transistor is different from a structure of the second transistor.

23. The display device according to claim 2,

wherein the display portion comprises a first transistor,

wherein the scanning line driver circuit comprises a second transistor, and

wherein a channel layer of the first transistor and a channel layer of the second transistor comprise the same material.

26. The display device according to claim 2, further comprising a reinforce plate overlapped with the scanning line driver circuit.

28. The display device according to claim 2, wherein a stress concentration region is provided between the first circuit portion and the second circuit portion.

30. The display device according to claim 2, wherein the supporting portion comprises at least one of a battery, an antenna, a CPU, and a memory.

3. A display device comprising:

a flexible display panel comprising a display portion including a scanning line and a signal line;

a supporting portion for supporting an end portion of the flexible display panel;

a signal line driver circuit for outputting a signal to the signal line, the signal line driver circuit provided in the supporting portion; and

a scanning line driver circuit comprising a first circuit portion and a second circuit portion each for outputting a signal to the scanning line, the first circuit portion and the second circuit portion provided along both edge portions of the flexible display panel in a direction which is perpendicular or substantially perpendicular to the supporting portion.

6. The display device according to claim 3, further comprising a groove for providing a stress concentration region between the display portion and the supporting portion.

9. The display device according to claim 3,

wherein the signal line driver circuit comprises a plurality of circuit portions, and

wherein the plurality of circuit portions are spaced from each other.

12. The display device according to claim 3,

wherein the signal line driver circuit comprises a transistor, and

wherein the transistor comprises a single crystal semiconductor.

15. The display device according to claim 3,

wherein the first circuit portion and the second circuit portion each comprises a transistor, and

wherein the transistor comprises a non-single crystal semiconductor.

18. The display device according to claim 3,

wherein the first circuit portion and the second circuit portion each comprises a transistor, and

wherein the transistor comprises an oxide semiconductor.

21. The display device according to claim 3,

wherein the signal line driver circuit comprises a first transistor,

wherein the scanning line driver circuit comprises a second transistor, and

wherein a structure of the first transistor is different from a structure of the second transistor.

24. The display device according to claim 3,

wherein the display portion comprises a first transistor,

wherein the scanning line driver circuit comprises a second transistor, and

wherein a channel layer of the first transistor and a channel layer of the second transistor comprise the same material.

27. The display device according to claim 3, further comprising a reinforce plate overlapped with the scanning line driver circuit.

31. The display device according to claim 3, wherein the supporting portion comprises at least one of a battery, an antenna, a CPU, and a memory.