Display apparatus including light-emitting diode in concave portion of pixel-defining layer

Patent metadata

Field	Value
Publication number	US-11764193-B2
Application number	US-201916599842-A
Country	US
Kind code	B2
Filing date	Oct 11, 2019
Priority date	Mar 10, 2016
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

A display apparatus includes: a substrate; a light-emitting diode (“LED”) disposed above the substrate; a pixel-defining layer disposed above the substrate and including a concave portion which defines a space in which the LED is disposed; a light guider disposed in the space and between the LED and a first inner side surface of the concave portion; and a light blocker disposed above the pixel-defining layer to cover a top portion of the LED. The LED is disposed a second inner side surface of the concave portion, which is opposite to the first inner side surface, and spaced apart from a center of the concave portion, and the light guider guides light emitted from the LED to a region adjacent to the second inner side surface of the concave portion.

First claim

What is claimed is:

1. A display apparatus comprising:
a substrate;
a pixel-defining layer disposed above the substrate and comprising a first concave portion and a second concave portion spaced apart from each other;
a first light-emitting diode and a second light-emitting diode, which are disposed in the first concave portion and the second concave portion, respectively; and
a light blocker disposed above the pixel-defining layer, wherein the light blocker exposes a center of the first concave portion and a center of the second concave portion,
wherein the first light-emitting diode is disposed adjacent to a first inner side surface of the first concave portion and the second light-emitting diode is disposed adjacent to a first inner side surface of the second concave portion,
wherein the first inner side surface of the first concave portion and the first inner side surface of the second concave portion are adjacent to each other, and
wherein the light blocker simultaneously covers an entire portion of the first inner side surface of the first concave portion, an entire portion of the first inner side surface of the second concave portion, the first light-emitting diode and the second light-emitting diode.

2. The display apparatus of claim 1 , wherein the first light-emitting diode is apart from the center of the first concave portion and the second light-emitting diode is apart from the center of the second concave portion.

3. The display apparatus of claim 1 , further comprising a light guide filled in the first and second concave portions.

4. The display apparatus of claim 3 , further comprising scattered particles distributed in the light guider.

5. The display apparatus of claim 4 , wherein the scattered particles are more densely distributed in a direction away from the first and second light-emitting diodes.

6. The display apparatus of claim 3 , further comprising a protection layer above the light guider, wherein a refractive index of the light guider is higher than a refractive index of the protection layer.

7. The display apparatus of claim 1 , further comprising first electrodes above the substrate, the first electrodes disposed within the first concave portion and the second concave portion respectively and electrically connected to the first light-emitting diode and the second light-emitting diode respectively.

8. The display apparatus of claim 7 , wherein each of the first light-emitting diode and the second light-emitting diode comprises:
a p-n diode;
a first contact electrode electrically connected to a corresponding first electrode among the first electrodes; and
a second contact electrode electrically connected to the light blocker.

9. The display apparatus of claim 8 , wherein a voltage for driving the first and second light-emitting diodes is applied to the light blocker.

10. The display apparatus of claim 1 , the light blocker is overlapped with parts of emission regions defined by the first and second concave portions, the light blocker extends to three edges of the first concave portion and three edges of the second concave portion in a plan view.

11. The display apparatus of claim 1 , further comprising a light blocking layer disposed on at least a first side surface of each of the first and second light-emitting diodes, the light blocking layer comprising an insulating material.

12. The display apparatus of claim 11 , wherein the first side surface of the first light-emitting diode faces the first inner side surface of the first concave portion, d the first side surface of the second light-emitting diode faces the first inner side surface of the second concave portion.

13. The display apparatus of claim 1 , wherein the light blocker does not overlap the center of the first concave portion and the center of the second concave portion in a plan view.

14. A display apparatus comprising:
a substrate;
first electrodes disposed above the substrate, the first electrode space apart from each other;
a first light-emitting diode and a second light-emitting diode disposed above the substrate and electrically connected to a corresponding first electrode respectively among the first electrodes;
a pixel-defining layer disposed above the substrate and comprising a first concave portion and a second concave portion, the first concave portion defines a first emission region in which the first light-emitting diode is disposed and the second concave portion defines a second emission region in which the second light-emitting diode is disposed; and
a light blocker disposed above the pixel-defining layer to cover top portions of the first light-emitting diode and the second light-emitting diode, wherein the light blocker exposes a center of the first concave portion and a center of the second concave portion;
wherein the first light-emitting diode is disposed adjacent to a first inner side surface of the first concave portion and the second light-emitting diode is disposed adjacent to a first inner side surface of the second concave portion,
wherein the first inner side surface of the first concave portion and the first inner side surface of the second concave portion are adjacent to each other, and
wherein the light blocker covers an entire portion of the first inner side surface of the flint concave portion and an entire portion of the first inner side surface of the second concave portion.

15. The display apparatus of claim 14 , wherein the first light-emitting diode is apart from the center of the first concave portion and the second light-emitting diode is apart from the center of the second concave portion.

16. The display apparatus of claim 14 , further comprising a light guide filled in the first and second concave portions.

17. The display apparatus of claim 16 , further comprising scattered particles distributed in the light guider.

18. The display apparatus of claim 14 , wherein each of the first light-emitting diode and the second light-emitting diode comprises:
a p-n diode;
a first contact electrode electrically connected to the corresponding first electrode; and
a second contact electrode electrically connected to the p-n diode.

19. The display apparatus of claim 18 , wherein each of the second contact electrodes of the first light-emitting diode and the second light-emitting diode electrically connected to the light blocker,
a voltage for driving the first and second light-emitting diodes is applied to the light blocker.

Assignees

• Samsung Display Co Ltd

Inventors

• Seo Youngseok
• Kim Mugyeom
• Kim Minsoo
• Kim Junghyun
• BOK Seunglyong

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/8516

  having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer or wavelength conversion layer with a concentration gradient · CPC title

• H10H20/882

  Scattering means (H10H20/82 takes precedence) · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H20/856

  Reflecting means · CPC title