DIFFUSING ELEMENT AND LIGHT MODULE

• US 20100208459A1
• Filed: 02/12/2010
• Published: 08/19/2010
• Est. Priority Date: 02/17/2009
• Status: Abandoned Application

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Lai, Sheh-Jung, Yang, Ta-Ho, Kuo, Yu-Feng, Lee, Hsiang-Chun
• Application Number:
  US12/704,531
• Publication Number:
  US 20100208459A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: G02B 5/0215 the surface having a regular structure
• CPC Class Codes: G02B 5/0278 used in transmission

Abstract

A diffusing element including a bar shape body and a plurality of light incident portions is provided. The bar shape body has a bottom part and a top part opposite thereto. The light incident portion is disposed on the bottom part and exposes a part of the bottom part. Each of the light incident portions has a light incident surface and a part of the bottom part is located between the light incident surface and the top part.

Claims

1. A diffusing element, comprising:

a bar-shape body having a bottom part and a top part opposite to the bottom part; and

a plurality of light incident portions disposed on the bottom part of the bar-shape body, and exposing a part of the bottom part, wherein each of the light incident portions has a light incident surface, and a part of the bottom part is located between the light incident surfaces and the top part,

wherein the bar-shape body and the light incident portions are formed integrally, and a haze of the diffusing element is above 70.

2. The diffusing element as claimed in claim 1, wherein the bar-shape body has a V-shape cross-section which takes an axial direction of the bar-shape body as a normal line, and an included angle of the V-shape cross-section is 30°

to 135°

.

3. The diffusing element as claimed in claim 2, wherein the light incident portions are at least located in a region surrounded by the V-shape cross-section.

4. The diffusing element as claimed in claim 3, wherein the light incident surfaces are apart from the top part of the bar-shape body, and two opposite sides of each of the light incident surfaces are connected with the bottom part of the bar-shape body.

5. The diffusing element as claimed in claim 4, wherein a cross-section of each of the light incident portions that takes the axial direction as a normal line is a triangle.

6. The diffusing element as claimed in claim 4, wherein a cross-section of each of the light incident portions intersecting and equally dividing the V-shape cross-section is a rectangle, a trapezoid, a semi-ellipse, or a hemicycle.

7. The diffusing element as claimed in claim 3, wherein each of the light incident portions further protrudes out from the region, and the light incident surface is apart from the top part of the bar-shape body.

8. A light source module, comprising:

an accommodating device having an accommodating portion and a plurality of wedging portions;

a plurality of point light sources disposed in the accommodating portion of the accommodating device, and each of the point light sources having a light-emitting surface; and

at least one diffusing element wedged in the wedging portions, and the diffusing element comprising;

a body having a bottom part and a top part opposite to the bottom part; and

a plurality of light incident portions disposed on the bottom part of the body, and exposing a part of the bottom part, wherein each of the light incident portions has a light incident surface, a part of the bottom part is located between the light incident surfaces and the top part, and the light incident surfaces are located above the light-emitting surface, so that the light incident surfaces face to the light-emitting surface,

wherein a haze of the diffusing element is above 70.

9. The light source module as claimed in claim 8, wherein the body and the light incident portions of the diffusing element are formed integrally.

10. The light source module as claimed in claim 8, wherein the body of the diffusing element is bar-shaped.

11. The light source module as claimed in claim 10, wherein the body has a V-shape cross-section which takes an axial direction of the body as a normal line, and an included angle of the V-shape cross-section is 30°

to 135°

.

12. The light source module as claimed in claim 11, wherein the light incident portions are at least located in a region surrounded by the V-shape cross-section.

13. The light source module as claimed in claim 12, wherein the light incident surfaces of the diffusing element are apart from the top part of the body, and two opposite sides of each of the light incident surfaces are connected with the bottom part of the body.

14. The light source module as claimed in claim 13, wherein a cross-section of each of the light incident portions that takes the axial direction as a normal line is a triangle.

15. The light source module as claimed in claim 13, wherein a cross-section of each of the light incident portions intersecting and equally dividing the V-shape cross-section is a rectangle, a trapezoid, a semi-ellipse, or a hemicycle.

16. The light source module as claimed in claim 13, wherein a minimum distance between a projection area of each of the point light sources orthographically projected on the corresponding light incident surface and an edge of the diffusing element is 0.5 mm to 1.5 mm.

17. The light source module as claimed in claim 12, wherein each of the light incident portions further protrudes out from the region, and the light incident surfaces are located apart from the top part of the body.

18. The light source module as claimed in claim 8, wherein the body of the diffusing element is plate-shaped and the light incident portions are disposed on the bottom part and extend along a first direction.

19. The light source module as claimed in claim 18, wherein a width of a cross-section of each of the light incident portions that takes the first direction as a normal line is gradually reduced along a second direction departing the top part from the bottom part.

20. The light source module as claimed in claim 19, wherein a cross-section of each of the light incident portions that takes the first direction as a normal line is a rectangle, a trapezoid, a semi-ellipse, or a hemicycle.

21. The light source module as claimed in claim 8, wherein a minimum distance between each of the light-emitting surfaces and the corresponding light incident surface is 0.1 mm to 0.3 mm.