Display device

Patent metadata

Field	Value
Publication number	US-2022209069-A1
Application number	US-202117529821-A
Country	US
Kind code	A1
Filing date	Nov 18, 2021
Priority date	Dec 30, 2020
Publication date	Jun 30, 2022
Grant date	—

Abstract

A display device comprises a first electrode disposed on a substrate, a second electrode disposed on the substrate and spaced apart from the first electrode, light emitting elements having ends disposed on the first electrode and the second electrode, a third electrode disposed on the substrate, and a fourth electrode disposed on the substrate and spaced apart from the third electrode, and semiconductor elements having ends disposed on the third electrode and the fourth electrode, wherein the light emitting elements each include a first semiconductor layer, a second semiconductor layer, and a light emitting layer disposed between the first semiconductor layer and the second semiconductor layer, and the semiconductor elements and the first semiconductor layer of the light emitting elements includes a same material.

First claim

What is claimed is:

1 . A display device comprising:
a first electrode disposed on a substrate; a second electrode disposed on the substrate and spaced apart from the first electrode; light emitting elements having ends disposed on the first electrode and the second electrode; a third electrode disposed on the substrate; a fourth electrode disposed on the substrate and spaced apart from the third electrode; and semiconductor elements having ends disposed on the third electrode and the fourth electrode, wherein the light emitting elements each include a first semiconductor layer, a second semiconductor layer, and a light emitting layer disposed between the first semiconductor layer and the second semiconductor layer, and the semiconductor elements and the first semiconductor layer of the light emitting elements include a same material.

2 . The display device of claim 1 , further comprising:
a first connection electrode disposed on the first electrode and in contact with an end of each of the light emitting elements; a second connection electrode disposed on the second electrode and in contact with another end of each of the light emitting elements; a third connection electrode disposed on the third electrode and in contact with an end of each of the semiconductor elements; and a fourth connection electrode disposed on the fourth electrode and in contact with another end of each of the semiconductor elements.

3 . The display device of claim 2 , wherein
the third connection electrode forms a Schottky contact with each of the semiconductor elements, and the fourth connection electrode forms an ohmic contact with each of the semiconductor elements.

4 . The display device of claim 3 , wherein each of the first connection electrode and the second connection electrode forms an ohmic contact with each of the light emitting elements.

5 . The display device of claim 1 , further comprising:
a via layer disposed between the substrate and the electrodes; and voltage wires disposed between the via layer and the substrate, wherein the voltage wires include:
a first voltage wire electrically connected to the first electrode;
a second voltage wire electrically connected to the second electrode;
a third voltage wire electrically connected to the third electrode; and
a fourth voltage wire electrically connected to the fourth electrode.

6 . The display device of claim 5 , wherein the fourth voltage wire is electrically connected to the first voltage wire.

7 . The display device of claim 5 , wherein
the first electrode is electrically connected to the first voltage wire through a first transistor disposed between the via layer and the substrate, and the second electrode contacts the second voltage wire through a contact hole penetrating the via layer.

8 . The display device of claim 7 , wherein
the third electrode contacts the third voltage wire through a contact hole penetrating the via layer, and the fourth electrode contacts the fourth voltage wire through a contact hole penetrating the via layer.

9 . The display device of claim 7 , wherein
the third electrode contacts the third voltage wire through a contact hole penetrating the via layer, and the fourth electrode is electrically connected to the fourth voltage wire through a first capacitor and a second transistor electrically connected to the first capacitor.

10 . The display device of claim 5 , wherein the fourth voltage wire is electrically connected to a power storage device electrically connected to the first voltage wire.

11 . The display device of claim 1 , further comprising a bank surrounding a region where the first electrode and the second electrode are disposed, and a region where the third electrode and the fourth electrode are disposed.

12 . The display device of claim 11 , further comprising protruding patterns disposed between the substrate and the first electrode, and between the substrate and the second electrode.

13 . The display device of claim 11 , wherein
each of the first electrode and the second electrode extends in a first direction, each of the third electrode and the fourth electrode extends in the first direction, and among regions surrounded by the bank, the region where the first electrode and the second electrode are disposed is spaced apart in a second direction intersecting the first direction from the region where the third electrode and the fourth electrode are disposed.

14 . The display device of claim 11 , wherein
each of the first electrode and the second electrode extends in a second direction, each of the third electrode and the fourth electrode extends in the second direction, and the region where the first electrode and the second electrode are disposed is spaced apart in the second direction from the region where the third electrode and the fourth electrode are disposed.

15 . The display device of claim 14 , wherein
the first electrode and the third electrode are disposed parallel to each other in the second direction, and the second electrode and the fourth electrode are disposed parallel to each other in the second direction.

16 . A display device comprising:
a display area and a non-display area surrounding the display area; sub-pixels disposed in the display area and disposed in a first direction and in a second direction intersecting the first direction, each of the sub-pixels including:
a first electrode;
a second electrode spaced apart from the first electrode; and
light emitting elements disposed on the first electrode and the second electrode; and
a semiconductor element array disposed in the non-display area, the semiconductor element array including:
a third electrode;
a fourth electrode spaced apart from the third electrode; and
semiconductor elements disposed on the third electrode and the fourth electrode,
wherein the semiconductor element array is disposed in the non-display area on sides of the display area in the second direction.

17 . The display device of claim 16 , wherein
the light emitting elements each include a first semiconductor layer, a second semiconductor layer, and a light emitting layer disposed between the first semiconductor layer and the second semiconductor layer, and the semiconductor elements and the first semiconductor layer of the light emitting elements include a same material.

18 . The display device of claim 16 , further comprising:
a first connection electrode disposed on the first electrode and in contact with an end of each of the light emitting elements; a second connection electrode disposed on the second electrode and in contact with another end of each of the light emitting elements; a third connection electrode disposed on the third electrode and in contact with an end of each of the semiconductor elements; and a fourth connection electrode disposed on the fourth electrode and in contact with another end of each of the semiconductor elements.

19 . The display device of claim 18 , wherein
each of the first connection electrode and the second connection electrode forms an ohmic contact with each of the light emitting elements, the third connection electrode forms a Schottky contact with each of the semiconductor elements, and the fourth connection electrode forms an ohmic contact with each of the semiconductor elements.

20 . The display device of claim 16 , wherein the first electrode, the second electrode, the third electrode, and the fourth electrode are dis

Assignees

• Samsung Display Co Ltd

Inventors

• Yoo Je Won
• Kim In Hyuk
• Lee Jong Won

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H29/142 Primary

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10D86/40

  characterised by multiple TFTs · CPC title

• H10H20/831

  characterised by their shape · CPC title

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title