Light source module

Patent metadata

Field	Value
Publication number	US-9348085-B2
Application number	US-201414501044-A
Country	US
Kind code	B2
Filing date	Sep 30, 2014
Priority date	Oct 3, 2013
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

A light source module includes a plurality of light emitting units, and each of the light emitting units includes a reflection plate, a light extraction plate, a sidewall structure, a light source, and a diffusion plate. The light extraction plate has a plurality of first holes, and the light extraction plate and the reflection plate are opposite to each other. The sidewall structure having a plurality of second holes is located between the reflection plate and the light extraction plate, and the reflection plate, the light extraction plate, and the sidewall structure together constitute a first light guiding cavity. The light source is located in the first light guiding cavity and adjoins the sidewall structure. The diffusion plate is located above the light extraction plate, and a second light guiding cavity is formed between the light extraction plate and the diffusion plate.

First claim

What is claimed is:

1. A light source module comprising a plurality of light emitting units, each of the light emitting units comprising:
a reflection plate;
a light extraction plate arranged opposite to the reflection plate, the light extraction plate having a plurality of first holes;
a sidewall structure located between the reflection plate and the light extraction plate, the sidewall structure having a plurality of second holes, the reflection plate, the light extraction plate, and the sidewall structure together constituting a first light guiding cavity;
a light source located in the first light guiding cavity, the light source adjoining the sidewall structure; and
a diffusion plate located above the light extraction plate, a second light guiding cavity being formed between the light extraction plate and the diffusion plate.

2. The light source module as recited in claim 1 , wherein the second holes of the sidewall structure occupy a first area A 1 , the sidewall structure occupies a second area A 2 , and A 1 /(A 1 +A 2 )=0.03 to 0.95.

3. The light source module as recited in claim 1 , wherein a shape of the second holes of the sidewall structure comprises a rectangle, a square, a triangle, a circle, an ellipse, a trapezoid, a polygon, or an irregular shape.

4. The light source module as recited in claim 1 , wherein the second holes are cyclically distributed or non-cyclically distributed.

5. The light source module as recited in claim 1 , wherein the second holes of the sidewall structure have a first height H 1 , a width W, and an interval X, the sidewall structure has a second height H 2 , H 1 /H 2 =0.1 to 0.99, and W/X=0.1 to 0.99.

6. The light source module as recited in claim 5 , wherein X−W=0.1 mm to 25 mm.

7. The light source module as recited in claim 1 , wherein the first light guiding cavity and the second light guiding cavity respectively have a height H 3 and a height H 4 , H 3 ranges from 1 mm to 10 mm, H 4 ranges from 0.5 mm to 5 mm, and H 3 +H 4 <15 mm.

8. The light source module as recited in claim 1 , wherein the first holes of the light extraction plate are arranged sequentially in columns C 1 to C n in a direction away from the light source, and a dimension of the first holes increases from the first column C 1 to the n th column C n .

9. The light source module as recited in claim 8 , wherein holes are between the first holes arranged in the n th column C n in each of the light emitting units and the first holes arranged in the first column C 1 in one of the light emitting units adjacent to the each of the light emitting units, and the holes are arranged in at least one column C a .

10. The light source module as recited in claim 9 , wherein parts of the holes are overlapped with the sidewall structure.

11. The light source module as recited in claim 9 , wherein the first light guiding cavity has a height H 3 , the first column to the n th column are located in a uniformity adjustment region, the at least one column C a is located in a brightness compensation region, a junction line is between the uniformity adjustment region and the brightness compensation region, a shortest distance from the junction line to the side wall is P, and 0.2×H 3 <P<5×H 3 .

12. The light source module as recited in claim 11 , wherein an aperture ratio of the holes arranged in the at least one column C a is from about 5% to about 43%.

13. The light source module as recited in claim 11 , wherein a dimension of the holes arranged in the at least one column C a is between the dimension of the first holes arranged in the first column C 1 and the dimension of the first holes arranged in the n th column C n .

14. The light source module as recited in claim 8 , wherein the dimension of the first holes in each of the columns C 1 to C n remains unchanged.

15. The light source module as recited in claim 8 , wherein the first light guiding cavity has a height H 3 , a shortest distance from an m th column C m to the light source, which are between the first column C 1 and the n th column C n , is D, H 3 /D is greater than 0.176, the dimensions of the first holes arranged in each of the columns C 1 to C m increase upon an increase of distances from the first holes to the light source, and the dimensions of the first holes arranged in any of the columns C m+1 to C n are identical.

16. The light source module as recited in claim 1 , further comprising a support structure located between the light extraction plate and the diffusion plate.

17. The light source module as recited in claim 16 , wherein the support structure is located on the sidewall structure.

18. The light source module as recited in claim 16 , wherein the support structure is located on the reflection plate, and the support structure passes through one of the first holes of the light extraction plate and extends to the diffusion plate.

19. A light source module comprising a plurality of light emitting units, each of the light emitting units comprising:
a reflection plate;
a light extraction plate arranged opposite to the reflection plate, the light extraction plate having a plurality of first holes;
a sidewall structure located between the reflection plate and the light extraction plate, the reflection plate, the light extraction plate, and the sidewall structure together constituting a first light guiding cavity;
a light source located in the first light guiding cavity, the light source adjoining the sidewall structure;
a diffusion plate located above the light extraction plate, a second light guiding cavity being formed between the light extraction plate and the diffusion plate; and
a support structure located between the light extraction plate and the diffusion plate.

20. The light source module as recited in claim 19 , wherein the support structure is located on the sidewall structure.

21. The light source module as recited in claim 19 , wherein the support structure is located on the reflection plate, and the support structure passes through one of the first holes of the light extraction plate and extends to the diffusion plate.

22. The light source module as recited in claim 19 , wherein the sidewall structure has a plurality of second holes, the second holes of the sidewall structure occupy a first area A 1 , the sidewall structure occupies a second area A 2 , and A 1 /(A 1 +A 2 )=0.03 to 0.95.

23. The light source module as recited in claim 22 , wherein a shape of the second holes of the sidewall structure comprises a rectangle, a square, a triangle, a circle, an ellipse, a trapezoid, a polygon, or an irregular shape.

24. The light source module as recited in claim 22 , wherein the second holes are cyclically distributed or non-cyclically distributed.

25. The light source module as recited in claim 22 , wherein the second holes of the sidewall structure have a first height H 1 , a width W, and an interval X, the sidewall structure has a second height H 2 , H 1 /H 2 =0.1 to 0.99, and W/X=0.1 to 0.99.

26. The light source module as recited in claim 25 , wherein X−W=0.1 mm to 25 mm.

27. The light source module as recited in claim 22 , wherein the first light guiding cavity and the second light guiding cavity respectively have a height H 3 and a height H 4 , H 3 ranges from 1 mm to 10 mm, H 4 ranges from 0.5 mm to 5 mm, and H 3 +H 4 <15 mm.

28. The light source module as

Assignees

• Au Optronics Corp

Inventors

• Chien Chih-Wei
• Tsai Zong-Huei

Classifications

• G02B6/0078

  Side-by-side arrangements, e.g. for large area displays · CPC title

• G02B6/0058

  varying in density, size, shape or depth along the light guide · CPC title

• G02B6/0051

  Diffusing sheet or layer · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title

• G02B6/0096 Primary

  the lights guides being of the hollow type · CPC title