LIGHT SOURCE MODULE, DISPLAY APPARATUS AND LIGHT TURNING FILM

• US 20170212297A1
• Filed: 01/11/2017
• Published: 07/27/2017
• Est. Priority Date: 01/26/2016
• Status: Active Grant

• Current Assignee: Nano Precision Taiwan Limited
• Original Assignee: Young Lighting Technology Inc. (Coretronic Corporation)
• Inventors: Weng, Chao-Hung, Liu, Ming-Dah
• Granted Patent: US 10,488,575 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 5/0231 the surface having microprismatic or micropyramidal shape macroscopic prism arrays G02B5/045
• CPC Class Codes: G02B 6/0038 Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
• CPC Class Codes: G02B 6/0053 Prismatic sheet or layer; Brightness enhancement element, sheet or layer

Abstract

A light source module, a display apparatus and a light turning film are provided. The light turning film includes a light incident surface and a light emitting surface. The light incident surface includes a plurality of first optical microstructures and a plurality of second optical microstructures, and is adapted to guide a light beam to enter the light turning film through the light incident surface. The light emitting surface is disposed opposite to the light incident surface, and is adapted to guide the light beam to leave the light turning film through the light emitting surface. The first optical microstructures and the second optical microstructures protrude outward from the light turning film with reference of a reference plane. Each of the first optical microstructures and each of the second optical microstructures are complied with predetermined conditions.

Claims

1. A light source module, comprising:

a light source, adapted to provide a light beam;

a light guide plate, having a light incident surface and a light emitting surface, and adapted to guide the light beam, wherein the light beam enters the light guide plate through the light incident surface, and leaves the light guide plate through the light emitting surface;

a light turning film, disposed above the light guide plate; and

a dual brightness enhancement film, disposed on the light turning film,

wherein the light turning film comprises a plurality of first optical microstructures and a plurality of second optical microstructures protruding towards the light guide plate from a reference plane, and each of the first optical microstructures and each of the second optical microstructures is complied with conditions of

2. The light source module as claimed in claim 1, wherein the first optical microstructures and the second optical microstructures are complied with a condition of 0<

A2≦

2A1, wherein A1 is a sum of projection areas of each of the first optical microstructures on the reference plane, and A2 is a sum of projection areas of each of the second optical microstructures on the reference plane.

3. The light source module as claimed in claim 1, wherein each of the first optical microstructures is adapted to change a light propagating direction of the light beam coming from the light guide plate, so as to transmit the light beam coming from the light guide plate to the dual brightness enhancement film, and the dual brightness enhancement film is adapted to reflect a part of the light beam coming from the light turning film for transmitting to the light turning film, each of the second optical microstructures is adapted to change a light propagating direction of a light beam coming from the dual brightness enhancement film, so as to transmit the light beam coming from the dual brightness enhancement film to the dual brightness enhancement film.

4. The light source module as claimed in claim 1, wherein each of the first optical microstructures and each of the second optical microstructures are complied with a condition of

5. The light source module as claimed in claim 1, wherein heights of each of the first optical microstructures protruding out of the reference plane are equivalent.

6. The light source module as claimed in claim 1, wherein heights of each of the second optical microstructures protruding out of the reference plane are equivalent.

7. The light source module as claimed in claim 1, wherein heights of each of the second optical microstructures protruding out of the reference plane are not equivalent.

8. The light source module as claimed in claim 1, wherein each of the second optical microstructures is complied with a condition of θ

=90 degrees.

9. The light source module as claimed in claim 1, wherein vertex angles of each of the second optical microstructures are equivalent.

10. The light source module as claimed in claim 1, wherein vertex angles of each of the second optical microstructures are not equivalent.

11. The light source module as claimed in claim 2, wherein the first optical microstructures and the second optical microstructures are complied with a condition of A1=A2.

12. The light source module as claimed in claim 2, wherein projection areas of each of the first optical microstructures on the reference plane are equivalent.

13. The light source module as claimed in claim 2, wherein projection areas of each of the second optical microstructures on the reference plane are equivalent.

14. The light source module as claimed in claim 2, wherein projection areas of each of the second optical microstructures on the reference plane are not equivalent.

15. The light source module as claimed in claim 1, wherein the first optical microstructures and the second optical microstructures are periodically arranged in interleaving on the reference plane.

16. The light source module as claimed in claim 1, wherein one or a plurality of the second optical microstructures is arranged between every two of the first optical microstructures.

17. A display apparatus, comprising a display panel and the light source module as claimed in claim 1, wherein the display panel is adapted to display an image, and the light source module is adapted to provide the light beam to serve as a display light source of the display panel.

18. A light turning film, comprising:

a light incident surface, comprising a plurality of first optical microstructures and a plurality of second optical microstructures, and adapted to guide a light beam to enter the light turning film through the light incident surface; and

a light emitting surface, disposed opposite to the light incident surface, and adapted to guide the light beam to leave the light turning film through the light emitting surface,

wherein the first optical microstructures and the second optical microstructures protrude outward from the light turning film with reference of a reference plane, and each of the first optical microstructures and each of the second optical microstructures is complied with conditions of

19. The light turning film as claimed in claim 18, wherein the first optical microstructures and the second optical microstructures are complied with a condition of 0<

A2≦

2A1, wherein A1 is a sum of projection areas of each of the first optical microstructures on the reference plane, and A2 is a sum of projection areas of each of the second optical microstructures on the reference plane.

20. The light turning film as claimed in claim 18, wherein heights of each of the first optical microstructures protruding out of the reference plane are equivalent.

21. The light turning film as claimed in claim 18, wherein one or a plurality of the second optical microstructures is arranged between every two of the first optical microstructures.

22. The light turning film as claimed in claim 18, wherein the first optical microstructures and the second optical microstructures are prism-shaped optical micro structures.