MEMBER FOR BACKLIGHT UNIT USING QUANTUM DOTS AND METHOD OF MANUFACTURING THE SAME

• US 20130194783A1
• Filed: 02/07/2011
• Published: 08/01/2013
• Est. Priority Date: 08/16/2010
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kang, Mun Suk
• Granted Patent: US 9,188,310 B2
• Time in Patent Office: Days
• US Class Current: 362/97.1
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: G02B 6/0023 provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: Y10S 977/774 Exhibiting three-dimensional carrier confinement, e.g. quantum dots
• CPC Class Codes: Y10S 977/952 Display

Abstract

A member for a backlight unit using quantum dots is provided comprising a frame where a blue LED is mounted and a light transmitting layer over the frame, wherein the light transmitting layer includes a quantum dot.

Claims

1. A member for a backlight unit using quantum dots comprising:

a frame where a blue LED is mounted; and

a light transmitting layer over the frame, wherein the light transmitting layer includes a quantum dot.

2. The member for a backlight unit of claim 1, wherein the quantum dot includes one or more of a red quantum dot and a green quantum dot that is smaller than the red quantum dot.

3. The member for a backlight unit of claim 1, wherein a diameter of the quantum dot ranges from 2 nm to 5 nm.

4. The member for a backlight unit of claim 1, wherein the quantum dot has one of a circular shape, a triangular shape, a rectangular shape, and an elliptical shape, or quantum dots having two or more shapes among the circular shape, the triangular shape, the rectangular shape, and the elliptical shape are contained.

5. The member for a backlight unit of claim 1, wherein the light transmitting layer includes the quantum dot in a polymer resin.

6. The member for a backlight unit of claim 5, wherein the polymer resin includes one or more of a silicon resin, an epoxy resin, and an acrylic resin.

15. The member for a backlight unit of claim 2, wherein a diameter of the quantum dot ranges from 2 nm to 5 nm.

16. The member for a backlight unit of claim 2, wherein the quantum dot has one of a circular shape, a triangular shape, a rectangular shape, and an elliptical shape, or quantum dots having two or more shapes among the circular shape, the triangular shape, the rectangular shape, and the elliptical shape are contained.

17. The member for a backlight unit of claim 2, wherein the light transmitting layer includes the quantum dot in a polymer resin.

18. The member for a backlight unit of claim 17, wherein the polymer resin includes one or more of a silicon resin, an epoxy resin, and an acrylic resin.

7. A method of manufacturing a member for a backlight unit using quantum dots, the method comprising:

mixing a polymer resin with a quantum dot solution so that the quantum dot solution is dispersed in the polymer resin;

printing the mixture on a substrate to have a predetermined thickness; and

curing the printed mixture, cutting the printed mixture to a predetermined shape, and removing the substrate.

8. The method of claim 7, wherein the quantum dot includes one or more of a red quantum dot and a green quantum dot that is smaller than the red quantum dot.

9. The method of claim 7, wherein a diameter of the quantum dot ranges from 2 nm to 5 nm.

10. The method of claim 7, wherein the quantum dot has one of a circular shape, a triangular shape, a rectangular shape, and an elliptical shape, or quantum dots having two or more shapes among the circular shape, the triangular shape, the rectangular shape, and the elliptical shape are contained.

11. The method of claim 7, wherein the polymer resin includes one or more of a silicon resin, an epoxy resin, and an acrylic resin.

12. The method of claim 7, wherein the substrate is a glass substrate.

13. The method of claim 7, wherein the thickness of the quantum dot solution-mixed polymer resin distributed on the substrate ranges from 1 μ

m to 1 mm.

14. The method of claim 7, wherein curing the printed mixture is performed at a temperature of 50°

C. to 200°

C. for 1 to 24 hours.

19. The method of claim 8, wherein a diameter of the quantum dot ranges from 2 nm to 5 nm.

20. The method of claim 8, wherein the quantum dot has one of a circular shape, a triangular shape, a rectangular shape, and an elliptical shape, or quantum dots having two or more shapes among the circular shape, the triangular shape, the rectangular shape, and the elliptical shape are contained.