Light source module and backlight unit including the same

Patent metadata

Field	Value
Publication number	US-10539736-B2
Application number	US-201715661898-A
Country	US
Kind code	B2
Filing date	Jul 27, 2017
Priority date	Jul 29, 2016
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

The present disclosure provides a light source module that includes a substrate, a plurality of light barriers on a surface of the substrate and spaced apart from each other, a plurality of light source packages on the surface of the substrate and positioned between the plurality of light barriers, and a total-reflection induction layer on the plurality of light source packages. The total-reflection induction layer has a flat surface opposite the plurality of light source packages. According to the various embodiments provided herein, the amount of light incident on a light guide plate increases, and a heat radiation effect is improved.

First claim

The invention claimed is:

1. A light source module, comprising:
a substrate having a surface;
a plurality of light barriers on the surface of the substrate and spaced apart from each other;
a plurality of light source packages on the surface of the substrate, the light source packages being positioned between the two light barriers of the plurality of light barriers; and
a total-reflection induction layer having a first surface on the plurality of light source packages and in contact with the surface of the substrate, the total-reflection induction layer extending between adjacent ones of the plurality of light source packages, the total-reflection induction layer having a flat surface that is opposite the first surface on the plurality of light source packages, the total-reflection induction layer being disposed between the light source packages with respect to a first direction, and the light source packages and the total-reflection induction layer being disposed between the light barrier in a second direction perpendicular to the first direction.

2. The light source module according to claim 1 , wherein the plurality of light barriers include a white organic material.

3. The light source module according to claim 2 , wherein the plurality of light barriers include at least one of: polycarbonate (PC), ethylene naphthalate (PEN), polyimide (PI), polyethersulfone (PES), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), or polystyrene (PS).

4. The light source module according to claim 1 , wherein the total-reflection induction layer includes a clear organic material.

5. The light source module according to claim 4 , wherein the clear organic material includes at least one of an optical clear adhesive or an optical clear resin.

6. The light source module according to claim 1 , wherein a distance from the surface of the substrate to the flat surface of the total-reflection induction layer is equal to, or less than, a distance from the surface of the substrate to an opposite surface of the plurality of light barriers.

7. The light source module according to claim 1 , wherein the plurality of light source packages include:
a plurality of light source chips on the surface of the substrate; and
a phosphor layer that surrounds the respective light source chips.

8. The light source module according to claim 1 , wherein the total-reflection induction layer has a refractive index that is greater than a refractive index of the plurality of light barriers.

9. A backlight unit, comprising:
a light source module including:
a substrate having a surface;
a plurality of light barriers on the surface of the substrate and spaced apart from each other;
a plurality of light source packages on the surface of the substrate, the light source packages being positioned between the two light barriers of the plurality of light barriers;
a total-reflection induction layer having a first surface on the plurality of light source packages, the total-reflection induction layer extending between and in contact with respective sidewalls of adjacent ones of the plurality of light source packages, the total-reflection induction layer having a flat surface that is opposite the first surface on the plurality of light source packages, the total-reflection induction layer being disposed between the light source packages with respect to a first direction, and the light source packages and the total-reflection induction layer being disposed between the light barrier in a second direction perpendicular to the first direction;
a light guide plate positioned adjacent to the flat surface of the total-reflection induction layer; and
a receiving member that receives the light source module and the light guide plate.

10. The backlight unit according to claim 9 , wherein a surface of the light guide plate adjacent to the flat surface of the total-reflection induction layer is in contact with at least one of the plurality of light barriers or the total-reflection induction layer.

11. The backlight unit according to claim 9 , wherein the plurality of light barriers include a white organic material.

12. The backlight unit according to claim 11 , wherein the plurality of light barriers include at least one of: polycarbonate (PC), ethylene naphthalate (PEN), polyimide (PI), polyethersulfone (PES), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), or polystyrene (PS).

13. The backlight unit according to claim 9 , wherein the total-reflection induction layer includes a clear organic material.

14. The backlight unit according to claim 13 , wherein the clear organic material includes at least one of an optical clear adhesive or an optical clear resin.

15. The backlight unit according to claim 9 , wherein a distance from the surface of the substrate to the flat surface of the total-reflection induction layer is equal to, or less than, a distance from the surface of the substrate to an opposite surface of the plurality of light barriers.

16. The backlight unit according to claim 9 , wherein the plurality of light source packages include:
a plurality of light source chips on the surface of the substrate; and
a phosphor layer that surrounds the respective light source chips.

17. The backlight unit according to claim 9 , wherein the total-reflection induction layer has a refractive index that is greater than a refractive index of the plurality of light barriers.

18. The backlight unit according to claim 9 , wherein the total-reflection induction layer has a refractive index that is greater than a refractive index of the light guide plate.

19. A method of making a light source module, comprising:
positioning a plurality of light barriers on a surface of a substrate, the plurality of light barriers being spaced apart from each other;
positioning a plurality of light source packages on the surface of the substrate and between the plurality of light barriers; and
forming a total-reflection induction layer on the plurality of light source packages, the total-reflection induction layer extending between and in contact with respective sidewalls of adjacent ones of the plurality of light source packages, the total-reflection induction layer having a flat surface opposite the plurality of light source packages.

20. The method of claim 19 , wherein the total-reflection induction layer is formed to have a distance from the surface of the substrate to the flat surface of the total-reflection induction layer that is equal to or less than a distance from the surface of the substrate to an opposite surface of the plurality of light barriers.

21. The light source module according to claim 1 , wherein the total-reflection induction layer contacts at least three surfaces of each of the plurality of light source packages.

22. The backlight unit according to claim 9 , wherein the total-reflection induction layer contacts at least five surfaces of each of the plurality of light source packages.

Assignees

• Lg Display Co Ltd

Inventors

• Kong Chang Kyeong
• Kweon Young Min
• Kim Jinho

Classifications

• G02B6/0023 Primary

  provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source · CPC title

• G02B6/0031

  Reflecting element, sheet or layer · CPC title

• H10W90/00

  Package configurations · CPC title

• G02B6/0073 Primary

  Light emitting diode [LED] · CPC title

• G02B6/0068

  Arrangements of plural sources, e.g. multi-colour light sources · CPC title