Light emitting display device

Patent metadata

Field	Value
Publication number	US-10714701-B2
Application number	US-201916273694-A
Country	US
Kind code	B2
Filing date	Feb 12, 2019
Priority date	Jul 15, 2016
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A light emitting device includes a plurality of unit light emitting regions on a substrate. At least one of the unit light emitting regions includes at least one pair of first and second electrodes that are spaced apart, at least one first bar-type LED in a first layer on the substrate, and at least one second bar-type LED in a second layer on the substrate. At least one of the first bar-type LED or the second bar-type LED is electrically connected between the first electrode and the second electrode.

First claim

What is claimed is:

1. A light emitting display device, comprising:
a first electrode and a second electrode on a substrate;
a first LED on the first electrode and the second electrode;
a third electrode directly contacting the first LED and the first electrode;
a fourth electrode directly contacting the first LED and the second electrode; and
a second LED located at a different height from a surface of the substrate than the first LED.

2. The light emitting display device of claim 1 , wherein:
the third electrode contacts a first end of the first LED and a first portion of an upper surface of the first LED located on the first end, in a cross-sectional view; and
the fourth electrode contacts a second end of the first LED and a second portion of the upper surface of the first LED located on the second end, in a cross-sectional view.

3. The light emitting display device of claim 2 , wherein the first end and the second end are opposite to each other in a longitudinal direction of the first LED.

4. The light emitting display device of claim 1 , wherein the first electrode and the second electrode are disposed on a same plane.

5. The light emitting display device of claim 1 , wherein the first electrode is connected to a first electrode line and the second electrode is connected to a second electrode line, to receive a power source or signal.

6. The light emitting display device of claim 1 , further comprising a pixel circuit connected to at least one of the first electrode and the second electrode.

7. The light emitting display device of claim 6 , wherein the pixel circuit includes a transistor disposed on a layer between the substrate and the first electrode and the second electrode.

8. The light emitting display device of claim 1 , wherein the first LED is a bar-type LED aligned in a direction crossing the first electrode and the second electrode.

9. The light emitting display device of claim 8 , wherein the first LED is aligned in a horizontal direction or an oblique direction between the first electrode and the second electrode, in a plan view.

10. The light emitting display device of claim 1 , wherein the first electrode and the second electrode are spaced apart from each other at a distance shorter than a length of the first LED.

11. The light emitting display device of claim 1 , further comprising a second LED disposed in a different layer from the first LED.

12. The light emitting display device of claim 11 , further comprising an insulating layer interposed between the first LED and the second LED.

13. The light emitting display device of claim 12 , wherein one surface of the insulating layer directly contacts the first LED and the other surface of the insulating layer directly contacts the second LED.

14. A light emitting display device, comprising:
a first electrode and a second electrode on a substrate;
a first LED on the first electrode and the second electrode;
a third electrode directly contacting the first LED and the first electrode; and
a fourth electrode directly contacting the first LED and the second electrode,
wherein each of the third electrode and the fourth electrode includes a transparent conductive material.

15. A light emitting display device, comprising:
a first pixel; and
a second pixel adjacent to the first pixel,
wherein each of the first pixel and the second pixel includes:
a first electrode and a second electrode on a substrate;
a first LED on the first electrode and the second electrode;
a third electrode directly contacting the first LED and the first electrode;
a fourth electrode directly contacting the first LED and the second electrode; and
a second LED located at a different height from a surface of the substrate than the first LED, and

wherein the first LED in the first pixel and the first LED in the second pixel emit light of different colors, respectively.

16. The light emitting display device of claim 15 , wherein:
the first LED includes a first end and a second end respectively disposed on the first electrode and the second electrode;
the third electrode contacts the first end of the first LED and a first portion of an upper surface of the first LED located on the first end, in a cross-sectional view; and
the fourth electrode contacts the second end of the first LED and a second portion of the upper surface of the first LED located on the second end, in a cross-sectional view.

17. The light emitting display device of claim 15 , wherein the first electrode and the second electrode are disposed on a same plane.

18. The light emitting display device of claim 15 , wherein each of the first pixel and the second pixel further includes a pixel circuit connected to at least one of the first electrode and the second electrode.

19. The light emitting display device of claim 15 , wherein each of the third electrode and the fourth electrode includes a transparent conductive material.

20. The light emitting display device of claim 15 , wherein the first electrode and the second electrode are spaced apart from each other at a distance shorter than a length of the first LED.

21. A light emitting display device, comprising:
a first electrode and a second electrode on a substrate;
a first LED on the first electrode and the second electrode, wherein the first LED comprises a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer overlapped only in a first direction, one end of the active layer contacts one end of the first conductive semiconductor layer, and the other end of the active layer contacts one end of the second conductive semiconductor layer;
a third electrode directly contacting the other end of the first conductive semiconductor layer and the first electrode; and
a fourth electrode directly contacting the other end of the second conductive semiconductor layer and the second electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Im Hyun Deok
• Kang Jong Hyuk
• Kim Dae Hyun
• Lee Joo Yeol
• Cho Chi O
• Cho Hyun Min

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10K50/115

  comprising active inorganic nanostructures, e.g. luminescent quantum dots · CPC title

• H10H20/032

  of electrodes · CPC title

• H10H20/851

  Wavelength conversion means · CPC title

• H10H20/831

  characterised by their shape · CPC title