Light source module, backlight assembly, and display device including the same
A light source module, backlight assembly, and display device including the same are disclosed. In one aspect, the light source module includes a printed circuit board, a plurality of light sources arranged over the printed circuit board, and a plurality of optical lenses respectively arranged over the light sources. Each of the optical lenses has upper and lower surfaces opposing each other. The light source module further includes a plurality of reflection patterns respectively formed on the optical lenses. Each of the reflection patterns includes a first reflection pattern formed on the lower surface of the corresponding optical lens and a second reflection pattern formed on the upper surface of the corresponding optical lens.
1. A light source module, comprising:
a printed circuit board;
a plurality of light sources arranged over the printed circuit board;
a plurality of optical lenses respectively arranged over the light sources, wherein each of the optical lenses has upper and lower surfaces opposing each other; and
a plurality of reflection patterns respectively formed on the optical lenses, wherein each of the reflection patterns includes a first reflection pattern formed on the lower surface of the corresponding optical lens and a second reflection pattern formed on the upper surface of the corresponding optical lens.
2. The light source module of claim 1 , wherein each of the first and second reflection patterns comprises a lens abrasion prevention layer, a reflection layer formed on the lens abrasion prevention layer, and a protection layer formed on the reflection layer.
3. The light source module of claim 2 , wherein each of the reflection layers is formed at least partially of aluminum or silver.
4. The light source module of claim 2 , wherein each of the reflection layers comprises a plurality of layers having different refractive indexes.
5. The light source module of claim 4 , wherein each of the plurality of layers is formed of a material selected from the group including magnesium fluoride, silicon dioxide, tantalum pentoxide, zinc sulfide, and titanium dioxide.
6. The light source module of claim 1 , wherein each of the second reflection patterns has a ring shape having a predetermined width.
7. The light source module of claim 6 , wherein each of the second reflection patterns is formed along the perimeter of the corresponding optical lens.
8. The light source module of claim 6 , wherein each of the second reflection patterns is formed between the perimeter and the center of the corresponding optical lens.
9. The light source module of claim 1 , wherein each of the second reflection patterns has a ring shape having a non-uniform width.
10. The light source module of claim 1 , wherein each of the second reflection patterns has a substantially circular shape that is substantially concentric with the corresponding optical lens.
11. The light source module of claim 1 , wherein each of the second reflection patterns has a width that is about 20% to about 40% of the diameter of the corresponding optical lens.
12. The light source module of claim 1 , wherein each of the second reflection patterns covers the entire upper surface of the corresponding optical lens.
13. The light source module of claim 1 , wherein each of the optical lenses further has an upper groove having a concavely recessed shape defined in the center of the upper surface thereof.
14. The light source module of claim 1 , wherein each of the optical lenses further has an upwardly convex surface defined in the center of the upper surface thereof.
15. A backlight assembly, comprising:
a receptacle;
a printed circuit board arranged over the receptacle;
a plurality of light sources arranged over the printed circuit board;
a plurality of optical lens respectively arranged over the light sources, wherein each of the optical lenses has upper and lower surfaces opposing each other;
a plurality of reflection patterns respectively formed on the optical lenses, wherein each of the reflection patterns includes a first reflection pattern formed on the lower surface of the corresponding optical lens and a second reflection pattern formed on the upper surface of the corresponding optical lens; and
a reflection sheet arranged over the receptacle and including a plurality of openings in which the optical lens are placed.
16. The backlight assembly of claim 15 , wherein each of the first and second reflection patterns comprises a lens abrasion prevention layer, a reflection layer formed on the lens abrasion prevention layer, and a protection layer formed on the reflection layer.
17. The backlight assembly of claim 15 , wherein the width of each of the second reflection patterns is about 20% to about 40% of the diameter of the corresponding optical lens.
18. The backlight assembly of claim 15 , wherein each of the second reflection patterns covers the entire upper surface of the corresponding optical lens.
19. A display device, comprising:
a receptacle;
a printed circuit board arranged over the receptacle;
a plurality of light sources arranged over the printed circuit board;
a plurality of optical lens respectively arranged over the light sources, wherein each of the optical lenses has upper and lower surfaces opposing each other;
a plurality of reflection patterns respectively formed on the optical lenses, wherein each of the reflection patterns includes a first reflection pattern formed on the lower surface of the corresponding optical lens and a second reflection pattern formed on the upper surface of the corresponding optical lens;
a reflection sheet arranged over the receptacle and including a plurality of openings in which the optical lens are placed;
an optical sheet arranged over the reflection sheet; and
a display panel arranged over the optical sheet.
20. The display device of claim 19 , wherein each of the second reflection patterns at least partially overlaps the corresponding first reflection pattern.