Method of providing light control member and method of providing display device having light control member

Patent metadata

Field	Value
Publication number	US-12208640-B2
Application number	US-202117496849-A
Country	US
Kind code	B2
Filing date	Oct 8, 2021
Priority date	Jan 20, 2021
Publication date	Jan 28, 2025
Grant date	Jan 28, 2025

Abstract

A method of providing a light control member includes providing a plurality of barrier walls spaced apart from each other and defining a concave portion therebetween, providing a light control resin including a quantum dot in the concave portion, providing a first light having a wavelength equal to or greater than about 430 nanometers and equal to or smaller than about 500 nanometers to the light control resin, providing a second light having a wavelength shorter than the wavelength of the first light to the light control resin to which the first light is irradiated, and providing heat-treating the light control resin to which the second light is irradiated.

First claim

What is claimed is:

1. A method of providing a light control member, comprising:
providing a base substrate comprising a barrier wall layer comprising a plurality of barrier walls spaced apart from each other to define a concave portion between adjacent barrier walls;
providing a light control resin material comprising a quantum dot, in the concave portion of the base substrate;
providing a first light having a wavelength equal to or greater than about 430 nanometers and equal to or smaller than about 500 nanometers to an un-irradiated light control resin to provide a first irradiated light control resin;
providing a second light having a wavelength shorter than the wavelength of the first light to the first irradiated light control resin to provide a second irradiated light control resin; and
providing heat-treating of the second irradiated light control resin to provide a heat-treated light control resin of the light control member which is in the concave portion of the base substrate.

2. The method of claim 1 , wherein
the providing of the light control resin material includes providing the un-irradiated light control resin as the light control resin material in the concave portion of the base substrate, and
the providing of the first light includes providing the first light to the un-irradiated light control resin which is in the concave portion of the base substrate.

3. The method of claim 2 , further comprising:
providing the heat-treating of the second irradiated light control resin at a temperature, and
providing preliminary heat-treating or vacuum drying of the first irradiated light control resin at a temperature lower than the temperature of the heat-treating of the second irradiated light control resin, between the providing of the first light and the providing of the second light.

4. The method of claim 1 , wherein the providing of the light control resin material includes providing the first irradiated light control resin as the light control resin material in the concave portion of the base substrate after the providing of the first light to the un-irradiated light control resin.

5. The method of claim 4 , further comprising:
providing the heat-treating of the second irradiated light control resin at a temperature, and
providing preliminary heat-treating or vacuum drying of the first irradiated light control resin at a temperature lower than the temperature of the heat-treating of the second irradiated light control resin, between the providing of the light control resin material and the providing of the second light.

6. The method of claim 1 , wherein
each of the un-irradiated light control resin, the first irradiated light control resin, the second irradiated light control resin and the heat-treated light control resin has a distribution density of the quantum dot, and
the distribution density of the quantum dot increases in order of the un-irradiated light control resin, the first irradiated light control resin, the second irradiated light control resin and the heat-treated light control resin.

7. The method of claim 6 , wherein a ratio of the distribution density of the quantum dot of the un-irradiated light control resin to the distribution density of the quantum dot of the heat-treated light control resin is in a range from 1:1.4 to 1:1.5.

8. The method of claim 1 , wherein the providing of the first light is performed at a temperature equal to or greater than about 25 degrees Celsius and equal to or smaller than about 80 degrees Celsius.

9. The method of claim 1 , wherein the second light has a center wavelength equal to or greater than about 300 nanometers and equal to or smaller than about 410 nanometers.

10. The method of claim 1 , wherein the providing of the second light comprises curing the first irradiated light control resin, after the providing of the first light.

11. The method of claim 1 , wherein the providing of the light control resin material in the concave portion of the base substrate includes an inkjet printing method.

12. The method of claim 1 , wherein
the base substrate further comprises:
a light filter layer, and
a base layer facing the barrier wall layer with the light filter layer therebetween,

the concave portion exposes the light filter layer to outside the barrier wall layer, and
the providing of the light control resin material comprises providing the light control resin material contacting the light filter layer.

13. The method of claim 1 , further comprising after the providing of the heat-treating of the second irradiated light control resin, providing polishing of the plurality of barrier walls,
wherein
the base substrate further comprises a base layer facing the barrier wall layer,
each of the plurality of barrier walls comprises a lower surface and an upper surface which opposes the lower surface and is further from the base layer than the lower surface, and
the providing of the polishing includes polishing the upper surface of the plurality of the barrier walls.

14. A method of providing a display device comprising:
providing a plurality of light emitting areas including a first light emitting area, a second light emitting area and a third light emitting area; and
in each of the plurality of light emitting areas:
providing a display element layer; and
providing a light control member facing the display element layer,
wherein the providing of the light control member comprises:
providing a barrier wall layer which includes a plurality of barrier walls spaced apart from each other which define a concave portion between adjacent barrier walls and corresponding to a respective light emitting area among the plurality of light emitting areas;
providing a light control resin material comprising a quantum dot in the concave portion of the barrier wall layer;
providing a first light having a wavelength equal to or greater than about 430 nanometers and equal to or smaller than about 500 nanometers to an un-irradiated light control resin to provide a first irradiated light control resin;
providing a second light having a wavelength shorter than the wavelength of the first light to the first irradiated light control resin to provide a second irradiated light control resin; and
providing heat-treating of the second irradiated light control resin to provide a heat-treated light control resin of the light control member which is in the concave portion of the barrier wall layer.

15. The method of claim 14 , wherein the providing of the light control resin material comprises providing a plurality of light control resins including a first light control resin, a second light control resin and a third light control resin to respectively correspond to the first light emitting area, the second light emitting area and the third light emitting area.

16. The method of claim 15 , wherein the first light control resin comprises a first quantum dot, the second light control resin comprises a second quantum dot, and the third light control resin excludes the quantum dot.

17. The method of claim 14 , wherein the providing of the first light is performed at a temperature equal to or greater than about 25 degrees Celsius and equal to or smaller than about 80 degrees Celsius.

18. The method of claim 14 , further comprising after the providing of the heat-treating of the second irradiated light control resin, providing polishing of the plurality of barrier walls,
wherein
each of the plurality of barrier walls comprises an upper surface which is furthest from the display element layer, a

Assignees

• Samsung Display Co Ltd

Inventors

• Kwon Sunyoung

Classifications

• B41M3/003

  on optical devices, e.g. lens elements; for the production of optical devices (production by thermal imaging means B41M5/265) · CPC title

• H10K59/38

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

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• G02B6/0026

  Wavelength selective element, sheet or layer, e.g. filter or grating · CPC title

• G02B5/206 Primary

  comprising particles embedded in a solid matrix · CPC title