Display apparatus

Patent metadata

Field	Value
Publication number	US-11018158-B2
Application number	US-201916677285-A
Country	US
Kind code	B2
Filing date	Nov 7, 2019
Priority date	Jun 5, 2017
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

Provided is a display apparatus. The display apparatus may include a monolithic device in which a light emitting element array, a transistor array, and a color control member are monolithically provided on one substrate. The display apparatus may include a first layered structure including the light emitting element array, a second layered structure including the transistor array, and a third layered structure including the color control member, wherein the second layered structure may be between the first layered structure and the third layered structure. The light emitting element array may include a plurality of light emitting elements comprising an inorganic material. The plurality of light emitting elements may have a vertical nanostructure.

First claim

What is claimed is:

1. A display apparatus comprising:
a first layered structure comprising an array of a plurality of light emitting elements, each comprising an inorganic material;
a second layered structure comprising an array of a plurality of transistors electrically connected to the plurality of light emitting elements;
an insulating layer covering the plurality of light emitting elements and the plurality of transistors; and
a third layered structure comprising a color control member disposed such that light output from the plurality of light emitting elements is incident thereon and configured to control a color of light transmitted therefrom; and
wherein the display apparatus has a monolithic configuration including at least two from among the first layered structure, the second layered structure and the third layered structure, and
wherein the insulating layer has a substantially flat surface, the third layered structure is provided on the substantially flat surface of the insulating layer, and the third layered structure has a substantially flat layer structure.

2. The display apparatus of claim 1 , wherein the plurality of light emitting elements comprise a plurality of vertical nanostructures, and
each of the plurality of vertical nanostructures has a core-shell structure comprising a first conductivity type semiconductor, an active layer, and a second conductivity type semiconductor.

3. The display apparatus of claim 2 , wherein each of the plurality of vertical nanostructures comprises at least one of a nanowire structure and a nanopyramid structure.

4. The display apparatus of claim 2 , wherein at least one of the first conductivity type semiconductor, the active layer, and the second conductivity type semiconductor comprises a gallium nitride (GaN)-based material.

5. The display apparatus of claim 1 , wherein each of the plurality of transistors is spaced apart from a light emitting element corresponding thereto such that the plurality of transistors do not overlap with the plurality of light emitting elements.

6. The display apparatus of claim 1 , wherein the display apparatus comprises a plurality of unit regions, and
each of the plurality of unit regions comprises a combination of at least two of the plurality of transistors and at least one capacitor.

7. The display apparatus of claim 1 , further comprising:
a yellow recycling film (YRF) provided between the second layered structure and the third layered structure; and
a blue cut filter (BCF) provided on the third layered structure,
wherein each of the YRF and the BCF has a substantially flat layer structure.

8. The display apparatus of claim 1 , wherein the plurality of light emitting elements comprise a first group of blue light emitting elements corresponding to a first subpixel, a second group of blue light emitting elements corresponding to a second subpixel, and a third group of blue light emitting elements corresponding to a third subpixel, and
the color control member comprises a blue-to-green color converting element corresponding to the second subpixel and a blue-to-red color converting element corresponding to the third subpixel.

9. The display apparatus of claim 8 , wherein the color control member further comprises a light scattering element corresponding to the first subpixel.

10. The display apparatus of claim 1 , wherein the display apparatus comprises an active region comprising the plurality of light emitting elements, the plurality of transistors, and the color control member and further comprises a scan driver connected to the active region and a data driver connected to the active region, and
at least two from among the active region, the scan driver, and the data driver have a monolithic configuration.

11. The display apparatus of claim 1 , wherein the display apparatus is a micro-display apparatus having a size of about 6 inches or less.

12. The display apparatus of claim 1 , wherein the monolithic configuration includes the first layered structure and the second layered structure.

13. A display apparatus comprising:
a light emitting element array comprising a plurality of light emitting elements, each comprising an inorganic material;
a transistor array comprising a plurality of transistors electrically connected to the plurality of light emitting elements;
a color control member configured to adjust a color of light generated by the plurality of light emitting elements;
a first optical film, disposed such that the light output from the plurality of light emitting elements is incident thereon and configured to transmit, to the color control member, a light of a first wavelength band and reflect a light of a second wavelength band; and
a second optical film, facing the first optical film with the color control member therebetween, configured to block the light of the first wavelength band and transmit the light of the second wavelength band; and,
wherein the display apparatus has a monolithic configuration including at least two from among the light emitting element array, the transistor array, the first optical film, the color control member, and the second optical film.

14. The display apparatus of claim 13 , wherein the display apparatus comprises a first layered structure comprising the light emitting element array, a second layered structure comprising the transistor array, and a third layered structure comprising the color control member.

15. The display apparatus of claim 14 , wherein the third layered structure is provided between the first optical film and the second optical film.

16. The display apparatus of claim 14 , wherein the second layered structure has a substantially flat surface, and
the first optical film, the third layered structure, and the second optical film are provided on the substantially flat surface.

17. The display apparatus of claim 13 , wherein the plurality of light emitting elements comprise a first group of blue light emitting elements corresponding to a first subpixel, a second group of blue light emitting elements corresponding to a second subpixel, and a third group of blue light emitting elements corresponding to a third subpixel, and
the color control member comprises a light scattering element corresponding to the first subpixel, a blue-to-green color converting element corresponding to the second subpixel, and a blue-to-red color converting element corresponding to the third subpixel.

18. The display apparatus of claim 13 , further comprising:
a first electrode electrically contacting a first group of light emitting elements from among the plurality of light emitting elements;
a first insulating layer covering the first electrode and the first group of light emitting elements;
a second insulating layer covering the plurality of transistors and the plurality of light emitting elements; and
a second electrode electrically connected to the plurality of light emitting elements, provided on the second insulating layer.

19. The display apparatus of claim 13 , further comprising:
a first electrode electrically contacting a first group of light emitting elements from among the plurality of light emitting elements;
a first insulating layer covering the first electrode and the first group of light emitting elements; and
a second electrode electrically connected to the plurality of light emitting elements.

20. The display apparatus of claim 13 , wherein the light emitting element array and the transistor array have a monolithic configuration.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Chung Chilhee
• Choi Junhee
• Hwang Sungwoo
• Jun Shinae
• Chung Deukseok
• Cho Junseok

Classifications

• H10D86/481

  integrated with passive devices, e.g. auxiliary capacitors · CPC title

• H10D86/0212

  comprising manufacture, treatment or coating of substrates · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10H20/821

  of the light-emitting regions, e.g. non-planar junctions · CPC title

• H10H20/818

  within the light-emitting regions · CPC title