ORGANIC EL PANEL AND METHOD FOR PRODUCING SAME

• US 20170301874A1
• Filed: 09/18/2015
• Published: 10/19/2017
• Est. Priority Date: 09/24/2014
• Status: Abandoned Application

• Current Assignee: Nippon Seiki Company Limited
• Original Assignee: Nippon Seiki Company Limited
• Inventors: TADOKORO, Toyoyasu, SHIRAISHI, Yotaro, IKEDA, Takashi
• Application Number:
  US15/513,549
• Publication Number:
  US 20170301874A1
• Time in Patent Office: Days
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• 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: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/813 characterised by their shape
• CPC Class Codes: H10K 50/814 combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/60 Forming conductive regions or layers, e.g. electrodes

Abstract

Provided is a narrow-frame organic EL panel for suppressing unevenness in the brightness of light emission. The present invention involves positioning the following on a translucent support substrate: a translucent first electrode to which power is supplied from an external power source via common wiring, a second electrode for forming a pair with the first electrode, and an organic EL element in which an organic layer having at least a light-emitting layer is sandwiched between the first electrode and the second electrode. In addition, a sealing member is positioned so as to cover the organic EL element in an airtight manner, an auxiliary electrode having a lower specific resistance than that of the first electrode is formed on the first electrode, a groove is provided in at least a section of the sealing member, and an auxiliary conductive part comprising a conductive material is positioned in the groove.

Claims

1. An organic EL panel, comprising:

a translucent first electrode to which power is supplied from an external power source via common wiring;

a second electrode paired with the first electrode;

an organic layer sandwiched between the first electrode and the second electrode, the organic layer having at least a light-emitting layer;

a support substrate supporting the first electrode, the second electrode, and the organic layer; and

a sealing member covering the first electrode, the second electrode, and the organic layer between the sealing member and the support substrate, wherein;

an auxiliary electrode having a lower resistivity than a resistivity of the first electrode is provided on the first electrode; and

a groove is provided in at least a part of the sealing member and an auxiliary conductive part is provided in the groove, the auxiliary conductive part being in contact with the auxiliary electrode and being made of a conductive material.

2. The organic EL panel according to claim 1, wherein

the groove is provided on an outer surface of the sealing member.

3. The organic EL panel according to claim 1, wherein

the sealing member includes a plate part facing to the organic layer and a support part extending toward the support substrate so as to surround the plate part, a part of the plate part extends from the support part to the outside, and the groove is formed by the support part and the plate part extending from the support part to the outside.

4. The organic EL panel according to claim 1, wherein

the auxiliary conductive part is made of a conductive paste.

5. The organic EL panel according to claim 1, wherein

the auxiliary conductive part includes a conducting wire electrically connected to the auxiliary electrode.

6. A method for producing an organic EL panel by dividing a common substrate into a plurality of organic EL panels, comprising:

a step of forming a first electrode made of a translucent conductive material on a translucent support substrate and forming an auxiliary electrode having a lower resistivity than a resistivity of the conductive material on a part of the first electrode;

a step of sequentially laminating an organic layer and a second electrode paired with the first electrode, the organic layer being a layer in which the auxiliary electrode is covered with an insulating material and having at least a light-emitting layer on the first electrode;

a step of sealing the first electrode, the auxiliary electrode, the second electrode, and the organic layer with a sealing member on the support substrate;

a division step of dividing the common substrate generated in the above step into a plurality of organic EL panels; and

a step of forming an auxiliary conductive part made of a conductive material in a groove formed by the sealing member on an outer surface of the organic EL panel generated in the division step so that the auxiliary conductive part is brought into contact with the auxiliary electrode.