Electroluminescence light emitting device and method for manufacturing the same

• US 20040104671A1
• Filed: 08/29/2003
• Published: 06/03/2004
• Est. Priority Date: 08/30/2002
• Status: Abandoned Application

• Current Assignee: TOMY Company Limited
• Original Assignee: TOMY Company Limited
• Inventors: Tamura, Masahiro, Fukuda, Shinsaku, Yokota, Kazuyuki, Koike, Kiyonori, Watanabe, Kimitaka, Yamanaka, Hiroyuki
• Application Number:
  US10/651,210
• Publication Number:
  US 20040104671A1
• Time in Patent Office: Days
• US Class Current: 313/506
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• CPC Class Codes: H05B 33/20 characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
• CPC Class Codes: H05B 33/22 characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
• CPC Class Codes: H05B 33/26 characterised by the composition or arrangement of the conductive material used as an electrode

Abstract

An electroluminescence light emitting device having: an electroluminescence light-emitting layer containing electroluminescence light-emitting elements therein; an electrode section having first and second electrodes which are disposed on one surface side of the electroluminescence light-emitting layer and have a predetermined pattern in which the first and second electrodes are electrically separated from each other with a spacing region; a top coating layer, which is disposed on the other surface side of the electroluminescence light-emitting layer, and on a front surface of which an electrically conductive material is attachable to form an alternating current electric field in the electroluminescence light-emitting layer by an alternating current power supply voltage applied between the first and second electrodes, the top coating layer having a compound additive containing dielectric; and a waterproof layer which is provided between the electrode section and the electroluminescence light-emitting layer.

Claims

1. An electroluminescence light emitting device comprising:

an electroluminescence light-emitting layer containing electroluminescence light-emitting elements therein;

an electrode section comprising first and second electrodes which are disposed on one surface side of the electroluminescence light-emitting layer and have a predetermined pattern in which the first and second electrodes are electrically separated from each other with a spacing region;

a top coating layer, which is disposed on the other surface side of the electroluminescence light-emitting layer, and on a front surface of which an electrically conductive material is attachable to form an alternating current electric field in the electroluminescence light-emitting layer by an alternating current power supply voltage applied between the first and second electrodes, the top coating layer comprising a compound additive containing dielectric; and

a waterproof layer which is provided between the electrode section and the electroluminescence light-emitting layer.

2. The electroluminescence light emitting device as claimed in claim 1, wherein the electroluminescence light-emitting layer contains a compound additive containing dielectric.

3. The electroluminescence light emitting device as claimed in claim 1, wherein the electroluminescence light emitting layer is formed with using ink which contains the electroluminescence light-emitting elements and a fluorocarbon resin by a silkscreen printing.

4. The electroluminescence light emitting device as claimed in claim 1, wherein a light-reflecting layer is provided between the electrode section and the electroluminescence light-emitting layer.

5. The electroluminescence light emitting device as claimed in claim 4, wherein the light-reflecting layer is formed with using ink which contains a barium titanate and a fluorocarbon resin by the silkscreen printing.

6. The electroluminescence light emitting device as claimed in claim 1, wherein the compound additive containing the dielectric is a silicon-based compound.

7. The electroluminescence light emitting device as claimed in claim 6, wherein the silicon-based compound is a silicon-based coupling agent.

8. The electroluminescence light emitting device as claimed in claim 7, wherein the silicon-based coupling agent is added 0.05-5.0% by weight of a solution which is made by diluting a material for forming a layer with a solvent.

9. The electroluminescence light emitting device as claimed in claim 1, wherein the waterproof layer is formed with using polyester-based ink by the silkscreen printing.

10. The electroluminescence light emitting device as claimed in claim 1, wherein the top coating layer is formed with using ink which contains an urethane-based ink and a curing agent by the silkscreen printing.

11. The electroluminescence light emitting device as claimed in claim 10, wherein the urethane-based ink and the curing agent are mixed in a 7:

8 ratio.

12. The electroluminescence light emitting device as claimed in claim 10, wherein the urethane-based ink and the curing agent are mixed in a 4:

3 ratio.

13. A method for manufacturing an electroluminescence light emitting device comprising:

an electroluminescence light-emitting layer containing electroluminescence light-emitting elements therein;

an electrode section comprising first and second electrodes which are disposed on one surface side of the electroluminescence light-emitting layer and have a predetermined pattern in which the first and second electrodes are electrically separated from each other with a spacing region;

a top coating layer, which is disposed on the other surface side of the electroluminescence light-emitting layer, and on a front surface of which an electrically conductive material is attachable to form an alternating current electric field in the electroluminescence light-emitting layer by an alternating current power supply voltage applied between the first and second electrodes; and

a waterproof layer which is provided between the electrode section and the electroluminescence light-emitting layer, the method comprising the steps of;

adding a compound additive-containing dielectric in the top coating layer; and

forming the waterproof layer with using polyester-based ink by the silkscreen printing.

14. The method for manufacturing the electroluminescence light emitting device as claimed in claim 13, further comprising a step of adding a compound additive containing dielectric in the electroluminescence light-emitting layer.

15. The method for manufacturing the electroluminescence light emitting device as claimed in claim 13, further comprising a step of forming the electroluminescence light emitting layer with using ink which contains the electroluminescence light-emitting elements and a fluorocarbon resin by the silkscreen printing.

16. The method for manufacturing the electroluminescence light emitting device as claimed in claim 13, further comprising steps of forming a light-reflecting layer with using ink which contains a barium titanate and a fluorocarbon resin by the silkscreen printing, and providing the light-reflecting layer under the electroluminescence light-emitting layer.

17. The method for manufacturing the electroluminescence light emitting device as claimed in claim 13, further comprising a step of forming the top coating layer with using ink which contains an urethane-based ink and a curing agent by the silkscreen printing.

18. The method for manufacturing the electroluminescence light emitting device as claimed in claim 17, further comprising a step of adding a hardening accelerator for forming the top coating layer.