Display device

• US 9,857,628 B2
• Filed: 02/06/2015
• Issued: 01/02/2018
• Est. Priority Date: 01/07/2011
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Hirakata, Yoshiharu
• Primary Examiner(s): Nguyen, Sang V
• Application Number:
  US14/615,870
• Publication Number:
  US 20150177566A1
• Time in Patent Office: 1,061 Days
• Field of Search: 349 74, 349 88, 349 86, 349 87, 349 89, 349 90, 349110
• CPC Class Codes: G02B 2027/012 comprising devices for attenuating parasitic image effects
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/1334 based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
• CPC Class Codes: G02F 1/133603 with LEDs

Abstract

A display device having a light-emitting element and a see-through capability, with which a variety of display modes can be exhibited depending on a use application or situation. In such a display device having a see-through capability, between a first display portion having pixels including dual-emission type light-emitting elements and a second display portion having a light-scattering liquid crystal layer, a shutter-shaped light-blocking unit is provided so that a variety of display modes can be exhibited depending on use applications or situations by selecting modes of the first display portion, the second display portion, and the shutter-shaped light-blocking unit.

Claims

1. A display device comprising:

a first support having a light-transmitting property;

a first display portion on the first support, the first display portion comprising a plurality of pixels each including a dual-emission type light-emitting element;

a second support having a light-transmitting property opposite to the first support;

a second display portion on the second support, the second display portion comprising a liquid crystal layer;

a plurality of shutters each including a light-blocking layer including an opening portion and a movable light-blocking layer; and

a sealant between the first support and the second support,

wherein the sealant bonds the first support and the second support,

wherein the first display portion and the second display portion are between the first support and the second support,

wherein the movable light-blocking layer is capable of blocking light passing through the opening portion,

wherein the opening portion is superposed with a part of the plurality of pixels, and

wherein when seen from a second support side, the second display portion is configured to display an image by using the first display portion as a backlight of the second display portion when the movable light-blocking layer is not superposed with the opening portion.

2. The display device according to claim 1, wherein the dual-emission type light-emitting element is an organic EL element.

3. The display device according to claim 1, wherein the liquid crystal layer comprises a polymer dispersed liquid crystal material.

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

a space including the first display portion and the second display portion between the first support and the second support,

wherein the space is sealed with the sealant.

16. The display device according to claim 1,

wherein the first display portion has a light-transmitting property when the dual-emission type light-emitting element is in a non-light-emission state;

and

wherein the second display portion has a light-transmitting property when the liquid crystal layer is in a light-transmitting state.

18. The display device according to claim 1, wherein the liquid crystal layer is a light-scattering liquid crystal layer.

20. The display device according to claim 1, wherein the liquid crystal layer is overlapped with the dual-emission type light-emitting element through the opening portion.

5. A display device comprising:

a first support having a light-transmitting property;

a first display portion on the first support, the first display portion comprising a plurality of pixels each including a dual-emission type light-emitting element;

a second support having a light-transmitting property opposite to the first support;

a second display portion on the second support, the second display portion comprising a liquid crystal layer;

a plurality of shutters each including a light-blocking layer including an opening portion and a movable light-blocking layer; and

a sealant between the first support and the second support,

wherein the sealant bonds the first support and the second support,

wherein the first display portion and the second display portion are between the first support and the second support,

wherein the movable light-blocking layer is capable of blocking light passing through the opening portion,

wherein the opening portion is superposed with a part of the plurality of pixels,

wherein the plurality of shutters are between the first display portion and the second display portion, and

wherein the liquid crystal layer is overlapped with the dual-emission type light-emitting element through the opening portion.

6. The display device according to claim 5, wherein one of the plurality of shutters comprises a MEMS.

7. The display device according to claim 5, wherein the dual-emission type light-emitting element is an organic EL element.

8. The display device according to claim 5, wherein the liquid crystal layer comprises a polymer dispersed liquid crystal material.

9. The display device according to claim 5, wherein one of the plurality of pixels is provided with the movable light-blocking layer.

10. The display device according to claim 5, wherein the plurality of pixels and the plurality of shutters are respectively provided in matrix, and light emitted from one group of the plurality of pixels aligned in a column direction is blocked by one movable light-blocking layer.

11. The display device according to claim 5, wherein the plurality of pixels and the plurality of shutters are respectively provided in matrix, and light emitted from one group of the plurality of pixels aligned in a row direction is blocked by one movable light-blocking layer.

12. The display device according to claim 5, wherein a background of the first display portion is black display when the movable light-blocking layer is superposed with the opening portion.

13. The display device according to claim 5, wherein a background of the first display portion is white display when the movable light-blocking layer is not superposed with the opening portion and the second display portion is in a light-scattering state.

14. The display device according to claim 5, wherein information on an object on the other side of the second support is displayed on the background of the first display portion when the movable light-blocking layer is not superposed with the opening portion and the second display portion is in a light-transmitting state.

15. The display device according to claim 5 further comprising:

a space including the first display portion and the second display portion between the first support and the second support,

wherein the space is sealed with the sealant.

17. The display device according to claim 5,

wherein the first display portion has a light-transmitting property when the dual-emission type light-emitting element is in a non-light-emission state;

and

wherein the second display portion has a light-transmitting property when the liquid crystal layer is in a light-transmitting state.

19. The display device according to claim 5, wherein the liquid crystal layer is a light-scattering liquid crystal layer.