Delocalizer and light emitting device using the same

Patent metadata

Field	Value
Publication number	US-11069872-B2
Application number	US-201816231949-A
Country	US
Kind code	B2
Filing date	Dec 25, 2018
Priority date	Nov 29, 2018
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A delocalizer and a light emitting device using the same are provided. The light emitting device includes a substrate and a first electrode layer. The first electrode layer is disposed over the substrate, in which two sides of the first electrode layer have a first contact pad and a second contact pad, respectively. The delocalizer is disposed between the first contact pad and the second contact pad. The delocalizer may include a plurality of strip-shaped transparent conductive members adjacent to each other, and a plurality of transparent conductive blocks adjacent to each other may be disposed between adjacent two of the strip-shaped transparent conductive members.

First claim

What is claimed is:

1. A light emitting device comprising:
an organic light emitting layer;
a first electrode layer comprising a first contact pad and a transparent conductive structure for the organic light emitting layer, wherein the transparent conductive structure comprises a plurality of strip-shaped transparent conductive members adjacent to each other,
wherein the strip-shaped transparent conductive members extend from the first contact pad;
wherein two of the strip-shaped transparent conductive members are separated by a first interval; and
wherein each of the two of the strip-shaped transparent conductive members has a width not less than the first interval, and the width is in a range of 10 to 50 microns;

a second electrode layer disposed over the organic light emitting layer; and
an insulating layer covering the transparent conductive structure, wherein the organic light emitting layer portionally covers the insulating layer.

2. The light emitting device of claim 1 , wherein the transparent conductive structure has a first portion adjacent to the first contact pad, and wherein the first portion is covered by the insulating layer.

3. The light emitting device of claim 2 , wherein the first portion of the transparent conductive structure has a width in a range of 800 to 1000 microns.

4. The light emitting device of claim 1 , further comprising a second contact pad, wherein the strip-shaped transparent conductive members are connected in series and are between the first contact pad and the second contact pad.

5. The light emitting device of claim 1 , wherein the strip-shaped transparent conductive members are made of indium tin oxide or indium zinc oxide.

6. The light emitting device of claim 1 , wherein each of the two of the strip-shaped transparent conductive members has the width being 15 microns, 20 microns or 30 microns.

7. The light emitting device of claim 1 , wherein the first interval is not greater than 30 microns.

8. The light emitting device of claim 1 , further comprising a plurality of transparent conductive blocks adjacent to each other and electrically connected between adjacent two of the strip-shaped transparent conductive members.

9. The light emitting device of claim 2 , wherein the insulating layer partially covers the first contact pad.

10. A delocalizer for delocalizing a dark spot of a light emitting region of an organic light emitting layer, the delocalizer comprising:
a plurality of strip-shaped transparent conductive members adjacent to each other,
wherein the adjacent two of the strip-shaped transparent conductive members are separated by a first interval; and
wherein each of the strip-shaped transparent conductive members has a width not less than the first interval, and the width is in a range of 10 to 50 microns;

a plurality of transparent conductive blocks adjacent to each other and electrically connected between adjacent two of the strip-shaped transparent conductive members; and
an insulating layer covering the transparent conductive structure, wherein the organic light emitting layer portionally covers the insulating layer.

11. The delocalizer of claim 10 , wherein each of the strip-shaped transparent conductive members has the width being 15 microns, 20 microns or 30 microns.

12. The delocalizer of claim 11 , wherein a ratio of the first interval to the width of each of the strip-shaped transparent conductive members is in a range of 1:2 to 1:4.

13. The delocalizer of claim 11 , wherein adjacent two of the transparent conductive blocks are separated by a second interval, and the second interval is about 10 times or more of the width of each of the strip-shaped transparent conductive members.

14. The delocalizer of claim 11 , wherein the first interval is not greater than 30 microns.

15. The delocalizer of claim 10 , wherein a short-circuit defect occurs at the light emitting region, and wherein the light emitting region has a light emitted near the short-circuit defect, and wherein the delocalizer is configured to delocalize the dark spot by gradually weakening the emitted light near the short-circuit defect, so that the dark spot cannot be observed with naked eyes.

16. The delocalizer of claim 10 , wherein the transparent conductive blocks electrically connected to two opposite sides of each of the strip-shaped transparent conductive members are staggered from each other in one direction.

17. The delocalizer of claim 10 , wherein the strip-shaped transparent conductive members and the transparent conductive blocks define a plurality of gaps, and wherein the strip-shaped transparent conductive members, the transparent conductive blocks, and the gaps have a first sum of area, the strip-shaped transparent conductive members and the transparent conductive blocks has a second sum of area, and wherein a ratio of the second sum of area to the first sum of area is in a range of 50% to 80%.

18. A light emitting device using the delocalizer of claim 10 comprising the organic light emitting layer, the light emitting device further comprising a second electrode layer disposed over the organic light emitting layer,
wherein the insulating layer covers the delocalizer and has an opening,
wherein the organic light emitting layer is filled in the opening,
and wherein the organic light emitting layer portionally covers the insulating layer.

19. The light emitting device of claim 18 , further comprising a first contact pad and a second contact pad, wherein the strip-shaped transparent conductive members are connected in series and are between the first contact pad and the second contact pad.

Assignees

• Chao Ching Yan
• Yen Feng Wen
• Luminescence Tech Corp

Inventors

• Chao Ching-Yan
• Yen Feng-Wen

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• H01L2251/5392

  Electricity · mapped topic

• H01L51/5212 Primary

  Electricity · mapped topic

• H10K77/10 Primary

  Substrates, e.g. flexible substrates · CPC title