Light-emitting device, display device, light-emitting system, and display system

Patent metadata

Field	Value
Publication number	US-9781783-B2
Application number	US-201213442073-A
Country	US
Kind code	B2
Filing date	Apr 9, 2012
Priority date	Apr 15, 2011
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A highly reliable light-emitting device is provided. A lighting device or a display device with a high level of safety and without an exposed electrode is provided. A lighting device or a display device with high layout flexibility is provided. A light-emitting system or a display system to which the light-emitting device or the display device can be applied is provided. An electrode for receiving power and a rectifier circuit are provided in a light-emitting device including an organic EL element and arranged so as to face an electrode for transmitting power, whereby alternating-current power is supplied to the light-emitting device. The alternating-current power is rectified by the rectifier circuit to direct-current power so that the organic EL element in the light-emitting device is driven.

First claim

What is claimed is:

1. A light-emitting device comprising:
a power receiving electrode;
a light-emitting element in a sealed volume and overlapping with the power receiving electrode, the light-emitting element comprising a layer including a light-emitting organic compound; and
a rectifier circuit electrically connected between the power receiving electrode and the light-emitting element,
wherein the power receiving electrode is configured to induce a voltage by electric field coupling,
wherein the rectifier circuit comprises only one terminal electrically connected to the power receiving electrode,
wherein the rectifier circuit is configured to rectify alternating-current power received by the power receiving electrode and to generate direct-current power for driving the light-emitting element,
wherein the power receiving electrode comprises a plate-like shaped conductive substrate,
wherein the sealed volume is defined by a first substrate, a second substrate facing the first substrate, and a sealing material between the first substrate and the second substrate, and
wherein the plate-like shaped conductive substrate is one of the first substrate and the second substrate.

2. The light-emitting device according to claim 1 , wherein the rectifier circuit comprises a thin film transistor.

3. The light-emitting device according to claim 1 , wherein the power receiving electrode includes a soft magnetic material.

4. A light-emitting system comprising:
the light-emitting device according to claim 3 ;
a power transmitting device configured to transmit power by electric field coupling, the power transmitting device comprising a power transmitting electrode; and
a magnetic substance configured to attract the power receiving electrode,
wherein the power receiving electrode is provided to face the power transmitting electrode when receiving power.

5. The light-emitting system according to claim 4 , wherein the power transmitting device is set in a wall, a ceiling, or a floor.

6. The light-emitting system according to claim 4 , wherein:
the power receiving electrode is flexible; and
the light-emitting device is capable of being attached to a curved surface of a wall, a ceiling, or a floor.

7. The light-emitting device according to claim 3 , wherein the light-emitting device is capable of being attached to a power transmitting device by a magnetic force between the light-emitting device and the power transmitting device.

8. The light-emitting device according to claim 3 , wherein the soft magnetic material is iron.

9. A light-emitting system comprising:
the light-emitting device according to claim 1 ; and
a power transmitting device configured to transmit power by electric field coupling, the power transmitting device comprising a power transmitting electrode,
wherein the power receiving electrode is provided to face the power transmitting electrode when receiving power.

10. The light-emitting device according to claim 1 ,
wherein the plate-like shaped conductive substrate constitutes the second substrate, and is over the sealing material and the light-emitting element, and
wherein the rectifier circuit is provided over the first substrate.

11. The light-emitting device according to claim 1 ,
wherein the plate-like shaped conductive substrate constitutes the first substrate,
wherein the light-emitting element is provided on the first substrate, and
wherein the rectifier circuit is included in an IC chip mounted on the first substrate.

12. A display device comprising:
a power receiving electrode;
a light-emitting element in a sealed volume and overlapping with the power receiving electrode, the light-emitting element comprising a layer including a light-emitting organic compound;
a rectifier circuit electrically connected between the power receiving electrode and the light-emitting element; a pixel comprising a transistor electrically connected to the light-emitting element; and
a driver circuit configured to drive the pixel,
wherein the power receiving electrode is configured to induce a voltage by electric field coupling,
wherein the rectifier circuit comprises only one terminal electrically connected to the power receiving electrode,
wherein the rectifier circuit is configured to rectify alternating-current power received by the power receiving electrode and to generate direct-current power for driving the light-emitting element,
wherein the power receiving electrode comprises a plate-like shaped conductive substrate,
wherein the sealed volume is defined by a first substrate, a second substrate facing the first substrate, and a sealing material between the first substrate and the second substrate, and
wherein the plate-like shaped conductive substrate is one of the first substrate and the second substrate.

13. The display device according to claim 12 , wherein the rectifier circuit comprises another thin film transistor.

14. The display device according to claim 12 , wherein the power receiving electrode includes a soft magnetic material.

15. A display system comprising:
the display device according to claim 14 ;
a power transmitting device configured to transmit power by electric field coupling, the power transmitting device comprising a power transmitting electrode; and
a magnetic substance configured to attract the power receiving electrode,
wherein the power receiving electrode is provided to face the power transmitting electrode when receiving power.

16. The display system according to claim 15 , wherein the power transmitting device is set in a wall, a ceiling, or a floor.

17. The display system according to claim 15 , wherein:
the power receiving electrode is flexible; and
the display device is capable of being attached to a curved surface of a wall, a ceiling, or a floor.

18. The display device according to claim 14 , wherein the display device is capable of being attached to a power transmitting device by a magnetic force between the display device and the power transmitting device.

19. The display device according to claim 14 , wherein the soft magnetic material is iron.

20. A display system comprising:
the display device according to claim 12 ; and
a power transmitting device configured to transmit power by electric field coupling, the power transmitting device comprising a power transmitting electrode,
wherein the power receiving electrode is provided to face the power transmitting electrode when receiving power.

21. The display device according to claim 12 , further comprising:
an antenna configured to receive a video signal; and
a control device configured to drive the driver circuit in accordance with a video signal received by the antenna.

22. The display device according to claim 12 ,
wherein the plate-like shaped conductive substrate constitutes the second substrate, and is over the sealing material and the light-emitting element, and
wherein the rectifier circuit is provided over the first substrate.

23. The display device according to claim 12 ,
wherein the plate-like shaped conductive substrate constitutes the first substrate,
wherein the light-emitting element is provided on the first substrate, and
wherein the rectifier circuit is included in an IC chip mounted on the first substrate.

24. A light-emitting device comprising:
a power receiving electrode; and
a light-emitting element in a sealed volume and overlapping with the power receiving

Assignees

• Kamata Koichiro
• Shionoiri Yutaka
• Yamazaki Shunpei
• Semiconductor Energy Lab

Inventors

• Kamata Koichiro
• Shionoiri Yutaka
• Yamazaki Shunpei

Classifications

• H05B45/60 Primary

  Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED] · CPC title

• H05B33/0896

  Electricity · mapped topic

• H01L27/3244

  Electricity · mapped topic

• H01L2251/5361

  Electricity · mapped topic

• H05B33/0815 Primary

  Electricity · mapped topic