EL light emitting device with waterproof function

• US 7,105,998 B2
• Filed: 05/15/2003
• Issued: 09/12/2006
• Est. Priority Date: 05/17/2002
• Status: Expired due to Fees

• Current Assignee: Print LABO Company Limited
• Original Assignee: Print LABO Company Limited
• Inventors: Fukuda, Shinsaku
• Primary Examiner(s): Raabe, Christopher M.
• Application Number:
  US10/513,820
• Publication Number:
  US 20050152125A1
• Time in Patent Office: 1,216 Days
• Field of Search: 313500-506, 313/512, 315/169.3, 345/36, 345/45, 345/76
• US Class Current: 313/500
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 59/87 Passivation; Containers; Encapsulations

Abstract

An EL light emitting device has: an EL light emitting layer having an EL light emitting material element; and an electrode section having a first electrode and a second electrode which are arranged on one surface side of the EL light emitting layer to be electrically separated from each other with a spacing region, and having a predetermined pattern. An alternating current electric field forming element, to form an alternating current electric field in the EL light emitting layer when an alternating current power supply voltage is applied between the first electrode and the second electrode, is adhered to the other surface side of the EL light emitting layer. A waterproof layer of a synthetic resin is arranged between at least one of the first electrode and the second electrode, and the EL light emitting layer.

Claims

1. An EL light emitting device comprising:

an EL light emitting layer comprising an EL light emitting material element;

an electrode section comprising a first electrode and a second electrode which are arranged on one surface side of the EL light emitting layer close to each other, and electrically separated from each other with a spacing region, and having a predetermined pattern;

an alternating current electric field forming elements to form an alternating current electric field in the EL light emitting layer when an alternating current power supply voltage is applied between the first electrode and the second electrode, to be adhered to the other surface side of the EL light emitting layer; and

a waterproof layer of a synthetic resin arranged between the first electrode and the second electrode.

3. The EL light emitting device of claim 1, wherein the EL light emitting layer has a waterproof function.

2. An EL light emitting device comprising:

an EL light emitting layer comprising an EL light emitting material element;

an electrode section comprising a first electrode and a second electrode which are arranged on one surface side of the EL light emitting layer to be close to each other, and electrically separated from each other with a spacing region, and having a predetermined pattern;

a reflecting layer arranged on said one surface side of the EL light emitting layer;

an alternating current electric field forming elements to form an alternating current electric field in the EL light emitting layer when an alternating current power supply voltage is applied between the first electrode and the second electrode, to be adhered to the other surface side of the EL light emitting layer,

wherein the reflecting layer has a waterproof function and is arranged between at least one of the first electrode and the second electrode, and the EL light emitting layer.

4. The EL light emitting device of claim 2 wherein the EL light emitting layer has a waterproof function.