Pixel structure, display apparatus including the pixel structure, and method of manufacturing the pixel structure

Patent metadata

Field	Value
Publication number	US-10818647-B2
Application number	US-201715646428-A
Country	US
Kind code	B2
Filing date	Jul 11, 2017
Priority date	Jul 11, 2016
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A pixel structure of a display apparatus includes an electrode line, at least one ultra small light-emitting diode, and a connection electrode. The electrode line includes a second electrode separated from a first electrode and at a same level as the first electrode on a base substrate. The at least one ultra small light-emitting diode is on the base substrate and has a length less than a distance between the first and second electrodes. A connection electrode includes a first contact electrode connecting the first electrode to the ultra small light-emitting diode and a second contact electrode connecting the second electrode to the ultra small light-emitting diode.

First claim

What is claimed is:

1. A pixel structure of a display apparatus, the pixel structure comprising:
an electrode line including a second electrode separated from a first electrode and at a same level as the first electrode on a base substrate;
at least one light-emitting diode on the base substrate, having a length in a length direction that is less than a distance between an end of the first electrode and an end of the second electrode facing the first electrode in the length direction, and having a first electrode layer at a first edge of the at least one light-emitting diode and a second electrode layer at a second edge of the at least one light-emitting diode; and
a connection electrode contacting the electrode line and the light-emitting diode, and including a first contact electrode connecting the first electrode to the light-emitting diode and a second contact electrode connecting the second electrode and the light-emitting diode,
wherein the first electrode layer and the second electrode layer have oppositely facing surfaces with respect to the length direction,
wherein the surface of the first electrode layer is arranged to face the end of the first electrode in the length direction, and
wherein the surface of the second electrode layer is arranged to face the end of the second electrode in the length direction.

2. The pixel structure of a display apparatus as claimed in claim 1 , wherein the first and second contact electrodes are transparent electrodes.

3. The pixel structure of a display apparatus as claimed in claim 1 , wherein a surface of at least one of the first or second electrodes facing the light-emitting diode is a reflection surface that reflects light to be emitted from the light-emitting diode.

4. The pixel structure of a display apparatus as claimed in claim 3 , wherein each of the first and second electrodes has a thickness greater than a thickness of the light-emitting diode.

5. The pixel structure of a display apparatus as claimed in claim 3 , wherein an angle of the reflection surface relative to the base substrate is less than 90 degrees.

6. The pixel structure of a display apparatus as claimed in claim 1 , wherein the light-emitting diode further includes:
first and second semiconductor layers between the first and second electrode layers; and
a first active layer between the first and second semiconductor layers,
wherein at least one of first and second electrode layers is a transparent electrode.

7. The pixel structure of a display apparatus as claimed in claim 1 , wherein each of the first and second electrodes includes a main electrode extending in a first direction and a finger electrode extending from the main electrode in a second direction crossing the first direction.

8. The pixel structure of a display apparatus as claimed in claim 7 , wherein a surface of the finger electrode facing the light-emitting diode is a reflection surface to reflect light.

9. The pixel structure of a display apparatus as claimed in claim 8 , wherein the finger electrode is electrically connected to the light-emitting diode via at least one of the first or second contact electrodes.

10. The pixel structure of a display apparatus as claimed in claim 1 , further comprising a dam structure on an outer side of the first and second electrodes, wherein the dam structure has a thickness greater than thicknesses of each of the first and second electrodes.

11. The pixel structure of a display apparatus as claimed in claim 1 , further comprising:
a driving transistor electrically connected to the first electrode; and
a power line electrically connected to the second electrode.

12. A display apparatus, comprising:
the pixel structure as claimed in claim 1 ; and
a driving circuit connected to the pixel structure.

13. The pixel structure of a display apparatus as claimed in claim 1 , wherein the first and second contact electrodes include indium (In).

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Daehyun
• Im Hyundeok
• Cho Hyunmin
• Kang Jonghyuk
• Hong Sungjin
• Lee Jooyeol
• Cho Chio

Classifications

• H10W72/0198

  batch processes · CPC title

• H10P72/50

  for positioning, orientation or alignment · CPC title

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/0364

  of interconnections · CPC title

• H10H20/833

  Transparent materials · CPC title