LIGHT SOURCE MODULE AND DISPLAY MODULE

• US 20140146568A1
• Filed: 01/29/2014
• Published: 05/29/2014
• Est. Priority Date: 07/23/2009
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Liao, Super
• Granted Patent: US 9,176,269 B2
• Time in Patent Office: Days
• US Class Current: 362/613
• CPC Class Codes: G02B 6/0011 the light guides being planar or of plate-like form
• CPC Class Codes: G02B 6/002 by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
• 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 6/0061 to provide homogeneous light output intensity

Abstract

A light source module including a light guide plate and a light source is provided. The light guide plate has a light incident surface and a light emitting region, and the light guide plate has a plurality of grooves or protruding patterns thereon. The length of the grooves or the protruding patterns is smaller than the length of the light guide plate. The light source is disposed on the light incident surface of the light guide plate, and the grooves or the protruding patterns of the light guide plate are disposed beside the light incident surface.

Claims

1. A light source module, comprising:

a light guide plate having an upper surface, a lower surface, a light incident surface, a light emitting region and a periphery region around the light emitting region, the light guide plate having a plurality of grooves or a plurality of protruding patterns disposed on at least one of the upper surface and the lower surface and extending in a direction from the light incident surface towards the light emitting region and crossing the periphery region into the light emitting region, wherein lengths of the grooves or the protruding patterns are smaller than a length of the light guide plate, and the lengths of extensions for the grooves or the protruding patterns which disposed on at least one of the upper surface and the lower surface are not all the same; and

a light source disposed on the light incident surface of the light guide plate, and the grooves or the protruding patterns of the light guide plate are disposed beside the light incident surface.

2. The light source module as claimed in claim 1, wherein the grooves or the protruding patterns are disposed in one of the upper surface or the lower surface of the light guide plate, and another surface of the upper surface and the lower surface is a surface having a plurality of microstructures.

3. The light source module as claimed in claim 1, wherein the light emitting region has a length L, the length of the grooves or the protruding patterns in the light emitting region is D, and 0<

D<

¼

L.

4. The light source module as claimed in claim 1, wherein the light guide plate further comprises a periphery region around the light emitting region, and the grooves or the protruding patterns are extending from the light incident surface towards the light emitting region across the periphery region.

5. The light source module as claimed in claim 4, wherein the length of the periphery region is A, the length of the grooves is d, and A<

d<

A+¼

L.

6. The light source module as claimed in claim 1, wherein a depth or a height of the grooves or the protruding patterns in the periphery region is larger than a depth or the height of the grooves or the protruding patterns in the light emitting region.

7. The light source module as claimed in claim 6, wherein the depth or the height of the grooves or the protruding patterns decreases in a linear manner.

8. The light source module as claimed in claim 6, wherein the depth or the height of the grooves or the protruding patterns decreases in a nonlinear manner.

9. The light source module as claimed in claim 1, wherein a depth or a height of the grooves or the protruding patterns changes in different manners.

10. The light source module as claimed in claim 1, wherein longitudinal sections of the grooves or the protruding patterns are V-shaped or U-shaped.

11. The light source module as claimed in claim 10, wherein included angles of the longitudinal sections of the grooves or the protruding patterns are not completely the same.

12. The light source as claimed in claim 1, wherein any two adjacent grooves or protruding patterns of the grooves or protruding patterns are connected to each other.

13. The light source as claimed in claim 1, wherein any two adjacent grooves or protruding patterns of the grooves or protruding patterns on the same surface of the light guide plate are not connected to each other.

14. The light source as claimed in claim 13, wherein spacing distances between the grooves or the protruding patterns are not completely the same.

15. The light source as claimed in claim 1, wherein extending directions of the grooves or the protruding patterns are parallel to each other.

16. The light source module as claimed in claim 1, further comprising an optical film set disposed above the upper surface of the light guide plate.

17. The light source as claimed in claim 1, wherein the light source comprises a plurality of point light sources, and each point light source is disposed corresponding to one of the grooves or the protruding patterns.

18. A display module, comprising:

a display panel; and

a light source module as claimed in claim 1, disposed on a side of the display panel.