Display panel and electronic device including the same

Patent metadata

Field	Value
Publication number	US-12439745-B2
Application number	US-202218051077-A
Country	US
Kind code	B2
Filing date	Oct 31, 2022
Priority date	Nov 1, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A display panel, including a light emitting panel including at least first and second light emitting units; and a color conversion panel including a surface opposite a surface of the light emitting panel and a color conversion layer including a first and second color conversion region and a partition wall defining the first and second color conversion region, wherein the first and second light emitting units are configured to provide the first color conversion region and the second color conversion region, respectively, with high energy incident light, wherein the first color conversion region includes a first semiconductor nanoparticle-polymer composite including a first polymer matrix including a polymer including a unit having a carboxyl group or an anion form of a carboxyl group, and further including, dispersed in the polymer matrix, first semiconductor nanoparticles an additional metal substance including a group IIB metal, a group IIIA metal, or a combination thereof.

First claim

What is claimed is:

1. A display panel, comprising
a light emitting panel comprising a plurality of light emitting units; and
a color conversion panel comprising a surface opposite a surface of the light emitting panel,
wherein the plurality of light emitting units comprises a first light emitting unit and a second light emitting unit,
wherein the color conversion panel comprises a color conversion layer comprising a first color conversion region and a second color conversion region, and a partition wall defining the first color conversion region and the second color conversion region,
wherein the first light emitting unit and the second light emitting unit are configured to provide the first color conversion region and the second color conversion region, respectively, with an incident light of an intensity of greater than or equal to about 10,000 candelas per square meter and less than or equal to about 17,000,000 candelas per square meter,
wherein the first color conversion region comprises a first semiconductor nanoparticle-polymer composite comprising a first polymer matrix and first semiconductor nanoparticles dispersed in the first polymer matrix, and the first semiconductor nanoparticle-polymer composite is configured to convert the incident light to a first light,
wherein the second color conversion region comprises a second semiconductor nanoparticle-polymer composite comprising a second polymer matrix and second semiconductor nanoparticles dispersed in the second polymer matrix, the second semiconductor nanoparticle-polymer composite is configured to convert the incident light to a second light, and the second light has a maximum luminescent peak wavelength different from the first light,
wherein the first color conversion region and the second color conversion region each independently have a light incident area of greater than or equal to about 1 square micrometer and less than or equal to about 1,000 square micrometers,
wherein the first polymer matrix comprises a polymer comprising a unit having a carboxyl group or an anion form of a carboxyl group,
wherein the first semiconductor nanoparticle-polymer composite further comprises an additional metal substance distributed in the first polymer matrix, and
wherein the additional metal substance comprises a Group IIB metal, a Group IIIA metal, or a combination thereof.

2. The display panel of claim 1 , wherein a luminescent peak wavelength of the incident light is greater than or equal to about 420 nanometers and less than about 490 nanometers.

3. The display panel of claim 1 , wherein the first light emitting unit and the second light emitting unit are spaced apart from one another,
and optionally wherein a partition wall is disposed between the first light emitting unit and the second light emitting unit.

4. The display panel of claim 1 , wherein the light emitting unit comprises a microsized light emitting diode, an inorganic nanosized light emitting diode, or a combination thereof.

5. The display panel of claim 1 , wherein a width of the first color conversion region and a width of the second color conversion region are each independently greater than or equal to about 1 micrometers and less than or equal to about 600 micrometers.

6. The display panel of claim 1 , wherein a luminescent peak wavelength of the first light is in a range of greater than or equal to about 500 nanometers and less than or equal to about 580 nanometers, and a luminescent peak wavelength of the second light is in a range of greater than about 580 nanometers and less than or equal to about 680 nanometers, or
wherein a luminescent peak wavelength of the second light is in a range of greater than or equal to about 500 nanometers and less than or equal to about 580 nanometers, and a luminescent peak wavelength of the first light is in a range of greater than about 580 nanometers and less than or equal to about 680 nanometers.

7. The display panel of claim 1 , wherein the first semiconductor nanoparticles, the second semiconductor nanoparticles, or a combination thereof comprise a Group II-VI compound, a Group III-V compound, a Group IV-VI compound, a Group IV element or compound, a Group I-III-VI compound, a Group I-II-IV-VI compound, or a combination thereof.

8. The display panel of claim 1 , wherein an amount of the first semiconductor nanoparticles in the first semiconductor nanoparticle-polymer composite is greater than or equal to about 10 weight percent and less than or equal to about 50 weight percent, based on a total weight of the first semiconductor nanoparticle-polymer composite.

9. The display panel of claim 1 ,
wherein the first semiconductor nanoparticle-polymer composite further comprises metal oxide particles dispersed in the first polymer matrix, or
wherein the second semiconductor nanoparticle-polymer composite further comprises metal oxide particles dispersed in the second polymer matrix, or
both the first semiconductor nanoparticle-polymer composite and the second semiconductor nanoparticle-polymer composites further comprise metal oxide particles dispersed in the first polymer matrix and in the second polymer matrix.

10. The display panel of claim 9 , wherein in the composite, an amount of the metal oxide particles is greater than or equal to about 0.1 weight percent and less than or equal to about 20 weight percent, based on a total weight of the composite.

11. The display panel of claim 1 , wherein the additional metal substance comprises aluminum, gallium, indium, zinc, or a combination thereof.

12. The display panel of claim 1 , wherein the additional metal substance comprises a hydrocarbyl aluminum, an aluminum halide, a zinc halide, a hydrocarbyl zinc, or a combination thereof.

13. The display panel of claim 1 , wherein the first polymer matrix, the second polymer matrix, or a combination thereof comprises a polyalkylene-poly(meth)acrylic copolymer, and
optionally wherein the first polymer matrix, the second polymer matrix, or a combination thereof further comprises a crosslinked polymer.

14. The display panel of claim 1 , wherein the additional metal substance comprises aluminum, the first semiconductor nanoparticles comprise indium and phosphorus, and in the first semiconductor nanoparticle-polymer composite, a mole ratio of aluminum to indium is greater than or equal to about 1:1 and less than or equal to about 50:1.

15. The display panel of claim 1 , wherein the additional metal substance comprises zinc, the first semiconductor nanoparticles comprise a zinc chalcogenide, and in the first semiconductor nanoparticle-polymer composite, a mole ratio of zinc to a sum of a chalcogen element is greater than or equal to about 1.3:1 and less than or equal to about 5:1.

16. The display panel of claim 1 , wherein the first semiconductor nanoparticle-polymer composite exhibits a relative luminance intensity of greater than or equal to about 60%, after being irradiated with an incident light having a luminous intensity of 9,000,000 candelas per square meter for fifteen minutes, calculated according to the formula:
relative luminance intensity=( I 15 /I 0 )×100%

wherein
I 15 is a photoluminescence intensity of the composite at 15 minutes, and
I 0 is an initial photoluminescence intensity of the composite.

17. A method of producing the display panel of claim 1 , which comprises:
providing the color conversion panel on the light emitting panel, and
wherein the color conversion panel is prepared by
depositing a first ink composition and a second ink composition in a first color conversion region

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kwon Soo Kyung
• Kim Yongwook
• Jang Eun Joo

Classifications

• H10W90/00

  Package configurations · CPC title

• H10H20/0361

  of wavelength conversion means · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title

• C08K9/02

  Ingredients treated with inorganic substances · CPC title

• C08K2201/011

  Nanostructured additives · CPC title