Backlight units for display devices

Patent metadata

Field	Value
Publication number	US-10509263-B2
Application number	US-201715478566-A
Country	US
Kind code	B2
Filing date	Apr 4, 2017
Priority date	Dec 31, 2015
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

Embodiments of a device and a method of forming the same are described. The device includes a backlight unit and an image generating unit. The backlight unit includes an optical cavity having a top side, a bottom side, and side walls. The backlight unit further includes an array of light sources coupled to the optical cavity and a quantum dot film positioned within the optical cavity. The quantum dot film is configured to process light received from the array of light sources and the backlight unit is configured to transit the processed light to the image generating unit. The method includes providing an optical cavity having a top side, a bottom side, and side walls. The method further includes coupling an array of light sources to the optical cavity and supporting a quantum dot film within the optical cavity.

First claim

What is claimed is:

1. A method of forming a display device, the method comprising:
providing at least one optical cavity having a top side, a bottom side, and side walls;
coupling an array of light sources to the at least one optical cavity; and
supporting an array of quantum dot (QD) films within the at least one optical cavity.

2. The method of claim 1 , further comprising providing an optically diffusive layer as the top side of the at least one optical cavity.

3. The method of claim 1 , wherein the supporting of the array of QD films comprises coupling the array of QD films to the top side of the at least one optical cavity.

4. The method of claim 1 , wherein the supporting of the array of QD films comprises:
providing a first plate positioned within the at least one optical cavity; and
coupling the array of QD films to the first plate.

5. The method of claim 1 , wherein the supporting of the array of QD films comprises:
providing a first plate and a second plate positioned within the at least one optical cavity; and
interposing the array of QD films between the first and second plates.

6. The method of claim 5 , further comprising providing an optically diffusive layer as the second plate.

7. The method of claim 1 , further comprising coupling the array of light sources to a top surface of the bottom side of the at least one optical cavity.

8. The method of claim 1 , further comprising:
forming an enclosed volume surrounding a row of the array of light sources using a QD film of the array of QD films.

9. The method of claim 8 , wherein the forming of the enclosed volume comprises:
bending the QD film over the row of the array of light sources; and
coupling the QD film to a top surface of the bottom side of the at least one optical cavity.

10. A method comprising:
providing at least one optical cavity;
disposing an array of light sources on a bottom side of the at least one optical cavity; and
supporting an array of quantum dot (QD) films within the at least one optical cavity.

11. The method of claim 10 , further comprising forming an enclosed volume surrounding each row of the array of light sources using a corresponding QD film of the array of QD films.

12. The method of claim 10 , wherein the supporting of the array of QD films comprises coupling the array of QD films to a top side of the at least one optical cavity.

13. The method of claim 10 , wherein the supporting of the array of QD films comprises:
providing a first plate positioned within the at least one optical cavity; and
coupling the array of QD films to the first plate.

14. A method of forming a light source unit, the method comprising:
coupling an array of light sources to a bottom side of at least one optical cavity; and
disposing an array of quantum dot (QD) films within the at least one optical cavity;
bending a QD film of the array of QD film to form a bent QD film; and
placing the bent QD film over a row of the array of light sources.

15. The method of claim 14 , further comprising bending each QD film of the array of QD films to form an array of bent QD films within the at least one optical cavity.

16. The method of claim 14 , further comprising forming an enclosed volume surrounding the row of the array of light sources using the bent QD film of the array of QD films.

17. The method of claim 14 , further comprising bending each QD film of the array of QD films over a corresponding row of the array of light sources.

18. The method of claim 14 , further comprising coupling the bent QD film to the bottom side of the at least one optical cavity.

19. The method of claim 14 , further comprising coupling the bent QD film to the at least one optical cavity with an optically transparent adhesive or a mechanical fastener.

20. The method of claim 14 , further comprising forming a semi-circular, triangular, or rectangular shaped volume surrounding the row of the array of light sources using the bent QD film.

Assignees

• Nanosys Inc

Inventors

• Lee Ernest
• Wilson Robert E
• Gensler Steven

Classifications

• G02F1/133602

  Direct backlight · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F1/133609 Primary

  including means for improving the color mixing, e.g. white · CPC title

• G02F1/133603

  with LEDs · CPC title