Display apparatus

Patent metadata

Field	Value
Publication number	US-11737313-B2
Application number	US-202117219519-A
Country	US
Kind code	B2
Filing date	Mar 31, 2021
Priority date	Aug 14, 2020
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A display apparatus includes: a top substrate over a bottom substrate and including a first region; a second-color color filter layer on a bottom surface of the top substrate and having a 2-1st opening exposing the first region; a first-color color filter layer including a portion in the 2-1st opening and a portion on a bottom surface of the second-color color filter layer; a bank between the first-color and the second-color color filter layers and the bottom substrate, the bank having a first opening corresponding to the first region, the first opening including a 1-1st portion overlapping the 2-1st opening and a 1-2nd portion outside the 2-1st opening; a first-color quantum dot layer in the first opening; and a first reflective layer on an inner surface of the first opening and a portion of a top surface of the first-color quantum dot layer.

First claim

What is claimed is:

1. A display apparatus comprising:
a bottom substrate;
a first light-emitting element over the bottom substrate and comprising a second-color emission layer;
a top substrate over the bottom substrate with the first light-emitting element therebetween and comprising a first region corresponding to the first light-emitting element;
a second-color color filter layer on a bottom surface of the top substrate facing the bottom substrate, the second-color color filter layer having a 2-1 st opening that exposes the first region;
a first-color color filter layer comprising a portion in the 2-1 st opening and a portion on a bottom surface of the second-color color filter layer facing the bottom substrate;
a bank between the first-color color filter layer and the bottom substrate and between the second-color color filter layer and the bottom substrate, the bank having a first opening that corresponds to the first region, the first opening comprising a 1-1 st portion overlapping the 2-1 st opening and a 1-2 nd portion outside the 2-1 st opening when viewed from a direction normal to the bottom surface of the top substrate;
a first-color quantum dot layer in the first opening; and
a first reflective layer on an inner surface of the first opening of the bank and on a portion of a top surface of the first-color quantum dot layer facing the top substrate, the portion of the top surface of the first-color quantum dot layer corresponding to the 1-2 nd portion.

2. The display apparatus of claim 1 , wherein the first reflective layer is on a portion of the inner surface of the first opening of the bank.

3. The display apparatus of claim 2 , wherein, when viewed from a direction normal to the top substrate, the first opening comprises a portion protruding in a direction defined in a virtual plane parallel to the bottom surface of the top substrate, and
the first reflective layer corresponds to the portion of the first opening that protrudes.

4. The display apparatus of claim 1 , wherein the first light-emitting element comprises a reflective electrode.

5. The display apparatus of claim 1 , further comprising a first additional reflective layer on a portion of a bottom surface of the first-color quantum dot layer facing the bottom substrate, the portion of the bottom surface of the first-color quantum dot layer corresponding to the 1-2 nd portion.

6. The display apparatus of claim 5 , wherein the first reflective layer is coupled to the first additional reflective layer.

7. The display apparatus of claim 1 , further comprising a second light-emitting element over the bottom substrate and comprising the second-color emission layer,
wherein the second-color color filter layer covers a second region of the top substrate that corresponds to the second light-emitting element,
the first-color color filter layer has a 1-2 nd opening that corresponds to the second region,
the bank has a second opening corresponding to the second region, and
when viewed from the direction normal to the bottom surface of the top substrate, the second opening comprises a 2-1 st portion overlapping the 1-2 nd opening and a 2-2 nd portion outside the 1-2 nd opening.

8. The display apparatus of claim 7 , wherein the second light-emitting element comprises a reflective electrode.

9. The display apparatus of claim 7 , further comprising a third light-emitting element over the bottom substrate and comprising the second-color emission layer,
wherein the second-color color filter layer has a 2-3 rd opening that exposes a third region of the top substrate that corresponds to the third light-emitting element,
the first-color color filter layer has a 1-3 rd opening that corresponds to the third region,
the bank has a third opening that corresponds to the third region,
when viewed from the direction normal to the bottom surface of the top substrate, the third opening comprises a 3-1 st portion overlapping the 2-3 rd opening and a 3-2 nd portion outside the 2-3 rd opening, and
the display apparatus further comprises:
a third-color color filter layer in the 2-3 rd opening;
a third-color quantum dot layer in the third opening; and
a third reflective layer on an inner surface of the third opening of the bank and on a portion of a top surface of the third-color quantum dot layer facing the top substrate, the portion of the top surface of the third-color quantum dot layer corresponding to the 3-2 nd portion.

10. The display apparatus of claim 9 , wherein the third reflective layer is on a portion of the inner surface of the third opening of the bank.

11. The display apparatus of claim 10 , wherein, when viewed from a direction normal to the top substrate, the third opening comprises a portion protruding in a first direction defined in a virtual plane parallel to the bottom surface of the top substrate facing the bottom substrate, and
the third reflective layer corresponds to the portion that protrudes.

12. The display apparatus of claim 11 , wherein, when viewed from the direction normal to the top substrate, the first opening comprises a portion protruding in the first direction,
the first reflective layer is on a portion of the inner surface of the first opening of the bank, and
the portion of the top surface of the first-color quantum dot layer facing the top substrate that the first reflective layer is on corresponds to the portion of the first opening that protrudes.

13. The display apparatus of claim 9 , wherein the third light-emitting element comprises a reflective electrode.

14. The display apparatus of claim 9 , further comprising a third additional reflective layer on a portion of a bottom surface of the third-color quantum dot layer facing the bottom substrate, the portion of the bottom surface of the third-color quantum dot layer corresponding to the 3-2 nd portion.

15. The display apparatus of claim 14 , wherein the third reflective layer is coupled to the third additional reflective layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Noh Hyunwoo
• Park Keunyoung
• Park Haeil
• Baek Moonjung
• Lee Kwangkeun
• Lee Junhan
• Han Suji

Classifications

• H10K59/80518

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K50/805

  Electrodes · CPC title

• H10K50/115

  comprising active inorganic nanostructures, e.g. luminescent quantum dots · CPC title

• H10K50/856 Primary

  comprising reflective means · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title