Granted Patent B2

US 12,402,508 · App. 18/522,217 · Granted Aug 26, 2025

Inventors: Younggu Kim (Yongin-si, KR); Jiyun Park (Yongin-si, KR); Bongsung Seo (Yongin-si, KR); Jongho Son (Yongin-si, KR); Jaejin Lyu (Yongin-si, KR); Yeonhee Lee (Yongin-si, KR); Baekkyun Jeon (Yongin-si, KR); Kyungseon Tak (Yongin-si, KR)

Assignee: Samsung Display Co., Ltd.

H10K59/38H10K59/12H10K59/879H10K59/877

Abstract

Claims (32)

1. A display apparatus comprising:

a substrate;

a first light-emitting device, a second light-emitting device, and a third light-emitting device, each comprising a first-color emission layer and being over the substrate;

a second-color quantum dot layer over the second light-emitting device;

a third-color quantum dot layer over the third light-emitting device;

a low refractive index layer over the second-color quantum dot layer and the third-color quantum dot layer to correspond to the first through third light-emitting devices, and comprising a matrix part and a plurality of particles in the matrix part, wherein a first portion of the matrix part close to the first through third light-emitting devices comprises fluorine;

a first-color color filter layer over the low refractive index layer to correspond to the first light-emitting device;

a second-color color filter layer over the low refractive index layer to correspond to the second light-emitting device; and

a third-color color filter layer over the low refractive index layer to correspond to the third light-emitting device,

wherein the first portion of the matrix part is greater in fluorine content per unit volume than a second portion of the matrix part away from the first through third light-emitting devices.

2. The display apparatus of claim 1 , further comprising a light-transmitting layer over the first light-emitting device, wherein the low refractive index layer is over the light-transmitting layer.

3. The display apparatus of claim 1 , wherein the second portion of the matrix part is farther from the first through third light-emitting devices than the first portion of the matrix part is to the first through third light-emitting devices.

4. The display apparatus of claim 1 , wherein the closer to the first through third light-emitting devices, the greater the fluorine content per unit volume in the matrix part is.

5. The display apparatus of claim 1 , wherein the second portion of the matrix part does not comprise fluorine.

6. A display apparatus comprising:

a substrate;

a first light-emitting device, a second light-emitting device, and a third light-emitting device, each comprising a first-color emission layer and being over the substrate;

a second-color quantum dot layer over the second light-emitting device;

a third-color quantum dot layer over the third light-emitting device;

a low refractive index layer over the second-color quantum dot layer and the third-color quantum dot layer to correspond to the first through third light-emitting devices, and comprising a matrix part and a plurality of particles in the matrix part, wherein a first portion of the matrix part close to the first through third light-emitting devices comprises fluorine;

a first-color color filter layer over the low refractive index layer to correspond to the first light-emitting device;

a second-color color filter layer over the low refractive index layer to correspond to the second light-emitting device; and

a third-color color filter layer over the low refractive index layer to correspond to the third light-emitting device,

wherein a first portion of the low refractive index layer close to the first through third light-emitting devices is less in number of the plurality of particles per unit volume than a second portion of the low refractive index layer away from the first through third light-emitting devices.

7. The display apparatus of claim 1 , further comprising a capping layer between the low refractive index layer and the first-color through third-color color filter layers to correspond to the first through third light-emitting devices.

8. The display apparatus of claim 1 , wherein the matrix part is integrally formed as a single body from a bottom surface of the low refractive index layer close to the first through third light-emitting devices to a top surface of the low refractive index layer away from the first through third light-emitting devices.

9. The display apparatus of claim 6 , wherein the second portion of the low refractive index layer is farther from the first through third light-emitting devices than the first portion of the low refractive index layer is to the first through third light-emitting devices.

10. The display apparatus of claim 9 , wherein the first portion of the low refractive index layer does not comprise the plurality of particles.

11. The display apparatus of claim 9 , further comprising a light-transmitting layer over the first light-emitting device, wherein the low refractive index layer is over the light-transmitting layer.

12. The display apparatus of claim 9 , wherein the first portion of the matrix part is greater in fluorine content per unit volume than a second portion of the matrix part farther from the first through third light-emitting devices than the first portion of the matrix part is to the first through third light-emitting devices.

13. The display apparatus of claim 9 , further comprising a capping layer between the low refractive index layer and the first-color through third-color color filter layers to correspond to the first through third light-emitting devices.

14. The display apparatus of claim 9 , wherein the matrix part is integrally formed as a single body from a bottom surface of the low refractive index layer close to the first through third light-emitting devices to a top surface of the low refractive index layer away from the first through third light-emitting devices.

Priority Claims (1)

Continuity (2)

References Cited (27)