Light source module and backlight unit including the same
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.
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.