Wavelength conversion member, related manufacturing method, and related backlight assembly

Patent metadata

Field	Value
Publication number	US-9874661-B2
Application number	US-201414293837-A
Country	US
Kind code	B2
Filing date	Jun 2, 2014
Priority date	Feb 11, 2014
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A wavelength conversion member may include a first substrate and a second substrate that overlaps the first substrate. The wavelength conversion member may further include a wavelength conversion layer disposed between the first substrate and the second substrate in a first direction. The wavelength conversion member may further include a first hydrophobic membrane that overlaps at least one of the first substrate, the second substrate, and the wavelength conversion layer in a second direction perpendicular to the first direction.

First claim

What is claimed is:

1. A wavelength conversion member comprising:
a first substrate;
a second substrate overlapping the first substrate;
a wavelength conversion layer disposed between the first substrate and the second substrate in a first direction;
a first hydrophobic membrane overlapping at least one of the first substrate, the second substrate, and the wavelength conversion layer in a second direction perpendicular to the first direction; and
a second hydrophobic membrane overlapping the first hydrophobic membrane in the second direction,
wherein a material of the first hydrophobic membrane is different from a material of the second hydrophobic membrane.

2. The wavelength conversion member of claim 1 , wherein the wavelength conversion layer includes quantum dots.

3. The wavelength conversion member of claim 1 , wherein the first hydrophobic membrane includes at least one of aerogel and octadecyltrichlorosilane.

4. The wavelength conversion member of claim 1 ,
wherein the second hydrophobic membrane overlaps at least one of the first substrate, the second substrate, and the wavelength conversion layer.

5. The wavelength conversion member of claim 4 , wherein the first hydrophobic membrane includes one of aerogel and octadecyltrichlorosilane, and
the second hydrophobic membrane includes the other of aerogel and octadecyltrichlorosilane.

6. The wavelength conversion member of claim 4 , wherein a portion of the second hydrophobic membrane overlap at least one of the first substrate and the second substrate in the first direction.

7. The wavelength conversion member of claim 6 , further comprising a sealant positioned between the first substrate and the second substrate in the first direction and positioned between the wavelength conversion layer and the first hydrophobic membrane in the second direction.

8. The wavelength conversion member of claim 4 , wherein the second hydrophobic membrane completely encloses the first substrate, the second substrate, and the first hydrophobic membrane.

9. The wavelength conversion member of claim 4 , further comprising a third hydrophobic membrane overlapping the second hydrophobic membrane in the second direction,
wherein a material of the third hydrophobic membrane is same as a material of the first hydrophobic membrane.

10. The wavelength conversion member of claim 4 , further comprising a fourth hydrophobic membrane positioned between the wavelength conversion layer and at least one of the first substrate and the second substrate,
wherein a material of the fourth hydrophobic membrane is same as a material of the second hydrophobic membrane.

11. The wavelength conversion member of claim 10 , wherein the fourth hydrophobic membrane completely encloses at least one of the first substrate and the second substrate.

12. A method for manufacturing a wavelength conversion member, the method comprising:
providing a first substrate, a second substrate, and wavelength conversion layer positioned between the first substrate and the second substrate in a first direction;
providing a first hydrophobic membrane that overlaps at least one of the first substrate, the wavelength conversion layer, and the second substrate in a second direction perpendicular to the first direction; and
providing a second hydrophobic membrane that overlaps the first hydrophobic membrane in the second direction, wherein a material of the second hydrophobic membrane is different from a material of the first hydrophobic membrane.

13. The method of claim 12 , wherein the providing the first hydrophobic membrane comprises applying a first hydrophobic solution on one or more side surfaces of at least one of the first substrate, the wavelength conversion layer, and the second substrate using a roller.

14. The method of claim 13 , wherein the providing the first hydrophobic membrane further comprises drying the first hydrophobic solution after applying the first hydrophobic solution.

15. The method of claim 12 , wherein the second hydrophobic membrane overlaps at least one of the first substrate, the wavelength conversion layer, and the second substrate.

16. The method of claim 15 , wherein the providing the second hydrophobic membrane comprises dipping one or more edge portions of at least one of the first hydrophobic membrane, the first substrate, the wavelength conversion layer, and the second substrate in a second hydrophobic solution provided in a container.

17. The method of claim 16 , wherein the providing the second hydrophobic membrane further comprises drying a portion of the second hydrophobic solution that is attached to one or more of the first hydrophobic membrane, the first substrate, the wavelength conversion layer, and the second substrate after the dipping.

18. A backlight assembly comprising:
a light source configured to emit first light that has a first wavelength; and
a wavelength conversion member configured to use the first light to generate second light that has a second wavelength different from the first wavelength,
wherein the wavelength conversion member includes:
a first substrate;
a second substrate overlapping the first substrate;
a wavelength conversion layer disposed between the first substrate and the second substrate in a first direction;
a first hydrophobic membrane including an octadecyltrichlorosilane membrane and overlapping at least of the first substrate, the second substrate, and the wavelength conversion layer in a second direction perpendicular to the first direction; and
a second hydrophobic membrane overlapping the first hydrophobic membrane in the second direction,
wherein a material of the first hydrophobic membrane is different from a material of the second hydrophobic membrane.

19. The backlight assembly of claim 18 , wherein the wavelength conversion layer includes quantum dots.

20. The backlight assembly of claim 18 , wherein the wavelength conversion member further includes a sealant positioned between the first substrate and the second substrate in the first direction and positioned between the wavelength conversion layer and the at least one hydrophobic membrane in the second direction.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Sang Hyuk
• Nam Seok Hyun

Classifications

• G02F2001/133614

  Physics · mapped topic

• G02B1/18 Primary

  Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films (G02B1/16 takes precedence) · CPC title

• G02B6/005

  provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title