Display panel with improved display quality and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12364134-B2
Application number	US-202217686098-A
Country	US
Kind code	B2
Filing date	Mar 3, 2022
Priority date	Mar 9, 2021
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A display panel may include first to third light emitting elements providing source light, first to third color filters, a first optical pattern between a first color filter and the first light emitting element, a second optical pattern between the second color filter and the second light emitting element, a third optical pattern between the third color filter and the third light emitting element, and a refractive layer between the first color filter and the first optical pattern, between the second color filter and the second optical pattern, and between the third optical pattern and the third light emitting element.

First claim

What is claimed is:

1. A display panel including a first pixel area, a second pixel area, a third pixel area, and a peripheral area adjacent to the first, second, and third pixel areas, the display panel comprising:
a first light emitting element, a second light emitting element, and a third light emitting element, the first, second, and third light emitting elements configured to generate source light and correspond to the first pixel area, the second pixel area, and the third pixel area, respectively;
a first color filter, a second color filter, and a third color filter overlapping the first pixel area, the second pixel area, and the third pixel area, respectively;
a first optical pattern between the first color filter and the first light emitting element configured to receive the source light and output a first color light different from the source light;
a second optical pattern between the second color filter and the second light emitting element configured to receive the source light and output a second color light different from the source light;
a third optical pattern between the third color filter and the third light emitting element configured to receive the source light and output a third color light substantially same as the source light; and
a refractive layer between the first color filter and the first optical pattern, between the second color filter and the second optical pattern, and between the third optical pattern and the third light emitting element,
wherein the refractive layer is a continuous layer from the first pixel area to the third pixel area.

2. The display panel of claim 1 , further comprising a partition wall having a first opening corresponding to the first pixel area and a second opening corresponding to the second pixel area,
wherein the first optical pattern is inside the first opening,
wherein the second optical pattern is inside the second opening, and
wherein the third optical pattern comprises a same material as the partition wall and conforms to a shape of the partition wall.

3. The display panel of claim 2 , wherein the partition wall and the third optical pattern comprise a base resin and scattering particles mixed with the base resin.

4. The display panel of claim 2 , wherein the refractive layer is between a first sidewall of the partition wall defining the first opening and the first optical pattern, and between a second sidewall of the partition wall defining the second opening and the second optical pattern.

5. The display panel of claim 2 , wherein a first surface of the first optical pattern facing the first light emitting element and a second surface of the second optical pattern facing the second light emitting element have a curved shape, and
wherein a third surface of the third optical pattern facing the third light emitting element has a flatter shape than the first surface and the second surface.

6. The display panel of claim 2 , further comprising a division pattern in which a first pattern opening corresponding to the first pixel area, a second pattern opening corresponding to the second pixel area, and a third pattern opening corresponding to the third pixel area are defined, and
wherein the division pattern is spaced apart from the partition wall with the refractive layer interposed therebetween, and the division pattern overlaps the peripheral area.

7. The display panel of claim 1 , further comprising a partition wall in which a first opening corresponding to the first pixel area, a second opening corresponding to the second pixel area, and a third opening corresponding to the third pixel area are defined, and
wherein the first optical pattern is inside the first opening, the second optical pattern is inside the second opening, and the third optical pattern is inside the third opening.

8. The display panel of claim 7 , wherein the third optical pattern comprises a base resin and scattering particles mixed with the base resin, and
wherein the partition wall comprises a light absorbing material.

9. The display panel of claim 7 , wherein the refractive layer is between a first sidewall of the partition wall defining the first opening and the first optical pattern, and between a second sidewall of the partition wall defining the second opening and the second optical pattern, and
wherein the third optical pattern is in direct contact with the partition wall.

10. The display panel of claim 7 , further comprising a division pattern in which a first pattern opening corresponding to the first pixel area, a second pattern opening corresponding to the second pixel area, and a third pattern opening corresponding to the third pixel area are defined, and
wherein the division pattern is spaced apart from the partition wall with the refractive layer interposed therebetween, and the division pattern overlaps the peripheral area.

11. The display panel of claim 1 , wherein the first color filter is a red color filter, the second color filter is a green color filter, and the third color filter is a blue color filter, and
wherein the source light is blue light, the first color light is red light, the second color light is green light, and the third color light is blue light.

12. The display panel of claim 1 , wherein the third color filter overlaps the peripheral area and the third pixel area, the third color filter having openings defined to correspond to the first pixel area and the second pixel area, respectively, and
wherein the first color filter overlaps the opening corresponding to the first pixel area, and the second color filter overlaps the opening corresponding to the second pixel area.

13. The display panel of claim 1 , wherein a refractive index of the refractive layer is 1.23.

14. The display panel of claim 1 , further comprising a protective layer covering and contacting the refractive layer.

15. An electronic device comprising a display panel including a first pixel area, a second pixel area, a third pixel area, and a peripheral area adjacent to the first, second, and third pixel areas,
wherein the display panel further comprises:
a first light emitting element, a second light emitting element, and a third light emitting element, the first, second, and third light emitting elements being configured to generate source light and correspond to the first pixel area, the second pixel area, and the third pixel area, respectively;
a first color filter, a second color filter, and a third color filter overlapping the first pixel area, the second pixel area, and the third pixel area, respectively;
a partition wall having a first opening corresponding to the first pixel area and a second opening corresponding to the second pixel area, and overlapping the peripheral area;
a first optical pattern inside the first opening configured to receive the source light and to output a first color light different from the source light;
a second optical pattern inside the second opening configured to receive the source light and to output a second color light different from the source light; and
a refractive layer overlapping the first, second, and third pixel areas and the peripheral area,
wherein the refractive layer is between the first color filter and the first optical pattern, between a first sidewall of the partition wall defining the first opening and the first optical pattern, between the second color filter and the second optical pattern, and between a second sidewall of the partition wall defining the second opening and the second optical pattern, and
wherein in an area overlapping the third pixel area, the refractive layer is spaced apart from

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Hyeseung
• Kwon Junghyun
• Kim Hyojoon
• Yoon Seon-Tae

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/8792

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

• H10K59/877

  comprising scattering means · CPC title

• H10K50/125

  specially adapted for multicolour light emission, e.g. for emitting white light · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title