Display device including light-emitting diodes

Patent metadata

Field	Value
Publication number	US-10580348-B2
Application number	US-201715453445-A
Country	US
Kind code	B2
Filing date	Mar 8, 2017
Priority date	Mar 10, 2016
Publication date	Mar 3, 2020
Grant date	Mar 3, 2020

Abstract

A display device includes pixels. Each of the plurality of pixels includes a pixel electrode, a light-emitting diode (LED), and an opposite electrode. The pixel electrode is divided into first to nth sub-electrodes. The LED is disposed on a boundary of the first to nth sub-electrodes. The opposite electrode is disposed opposite to the pixel electrode. The LED is disposed between the pixel electrode and the opposite electrode. n is an integer equal to or greater than 2.

First claim

What is claimed is:

1. A display device, comprising:
a plurality of pixels,
wherein each of the plurality of pixels comprises:
a pixel electrode divided into first to n th sub-electrodes;
a light-emitting diode (LED) disposed on a boundary of the first to n th sub-electrodes, wherein the LED is disposed on a portion of each of the first to n th sub-electrodes;
first to n th shutters, wherein each of the first to n th shutters is disposed on a side surface of the LED to surround the LED; and
an opposite electrode disposed opposite to the pixel electrode, wherein
the LED is disposed between the pixel electrode and the opposite electrode, and
wherein n is an integer equal to or greater than 2.

2. The display device of claim 1 , wherein the first to n th sub-electrodes are spaced apart from each other and each have a crossing point.

3. The display device of claim 2 , wherein the LED) is disposed on the crossing point.

4. The display device of claim 1 , wherein the pixel electrode is substantially parallel to the opposite electrode.

5. The display device of claim 1 , wherein a gap between the pixel electrode and the opposite electrode is substantially the same size as a height of the LED.

6. The display device of claim 1 , wherein the first to n th sub-electrodes are connected to first to n th thin film transistors (TFTs), respectively.

7. The display device of claim 1 , wherein, the LED comprises a first contact electrode, a p-n diode, and a second contact electrode sequentially stacked,
the first contact electrode is connected to the pixel electrode, and
the second contact electrode is connected to the opposite electrode.

8. The display device of claim 1 , wherein the first to n th shutters are respectively disposed on the first to n th sub-electrodes.

9. The display device of claim 8 , wherein the first to n th shutters are configured to be driven by electrostatic force.

10. The display device of claim 8 , wherein the first to n th shutters comprise a black matrix material.

11. A display device, comprising:
a plurality of pixels,
wherein each of the plurality of pixels comprises:
a pixel electrode divided into first to n th sub-electrodes;
a light-emitting diode (LED) disposed on a boundary of the first to n th sub-electrodes; and
an opposite electrode disposed opposite to the pixel electrode, wherein
the LED is disposed between the pixel electrode and the opposite electrode, and wherein n is an integer equal to or greater than 2, wherein the LED comprises a light barrier disposed at a location corresponding to the boundary of the first to n th sub-electrodes, wherein the light barrier divides the LED into first to n th sub-LEDs and is configured to block light where the LED is divided.

12. The display device of claim 11 , wherein the light barrier reflects light emitted from the LED.

13. The display device of claim 11 , wherein the light barrier is disposed at a location corresponding to the boundary between each of the first to n th sub-electrodes.

14. The display device of claim 11 , further comprising an optical waveguide layer disposed between the pixel electrode and the opposite electrode.

15. The display device of claim 11 , wherein the light barrier extends between the first to n th sub-LEDs and is disposed on a same layer as the first to n th sub-electrodes.

16. A display device, comprising:
a plurality of pixels,
wherein each of the plurality of pixels comprises:
a pixel electrode divided into first to n th sub-electrodes;
a light-emitting diode (LED) divided into first to n th sub-LEDs; and
an opposite electrode disposed opposite to the pixel electrode, wherein
the first to n th sub-LEDs are disposed on a boundary of the first to n th sub-electrodes, and
wherein n is an integer equal to or greater than 2, wherein the LED comprises a light barrier configured to divide the LED into the first to n th sub-LEDs and is configured to block light where the LED is divided.

17. The display device of claim 16 , wherein the first to n th sub-electrodes are divided from each other from a crossing point the light-emitting diode (LED) is disposed on.

18. The display device of claim 16 , wherein the pixel electrode is a light reflective electrode.

19. The display device of claim 16 , wherein the sub-LEDs are electrically separated from each other by the light barrier.

20. A display device, comprising:
a plurality of pixels;
a plurality of sub-pixels in each pixel;
a plurality of sub-pixel electrodes disposed on the sub-pixels correspondingly; and
a light-emitting diode (LED) including a plurality of sub-LEDs, wherein each sub-LED of the plurality of sub-LEDs is separately controlled by a corresponding sub-pixel electrode of the plurality of sub-pixel electrodes, wherein a light barrier is disposed on a side surface of each sub-LED of the plurality of sub-LEDs, wherein the light barrier is substantially perpendicular to a sub-pixel electrode of the plurality of sub-pixel electrodes, and
wherein visible light generated by the light-emitting diode (LED) propagates toward and filled in each sub-pixel area.

Assignees

• Samsung Display Co Ltd

Inventors

• Bae Jongsung
• Kim Mugyeom
• Jeong Changyong

Classifications

• G09G3/32 Primary

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09G2300/0809

  Several active elements per pixel in active matrix panels · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• H01L27/124

  Electricity · mapped topic