Light source device
A light source device includes a substrate, a plurality of light sources arranged on the substrate, a light transmissive member arranged over the light sources, and a light-reflecting pattern. The light-reflecting pattern is arranged above or below the light transmissive member such that a thickness and/or a concentration of material of the light-reflecting pattern in a first region directly above one of the light sources is greater than the thickness and/or the concentration of material of the light-reflecting pattern in a second region above a portion between adjacent ones of the light sources.
1. A light source device comprising:
a substrate;
a plurality of light sources arranged on the substrate, the light sources including a first light source and a second light source, an amount of light emitted from the first light source being different from an amount of light emitted from the second light source;
a light transmissive member arranged over the light sources;
a light-reflecting pattern arranged above or below the light transmissive member such that a thickness and/or a concentration of material of the light-reflecting pattern in a first region directly above one of the light sources is greater than the thickness and/or the concentration of material of the light-reflecting pattern in a second region above a portion between adjacent ones of the light sources, wherein
the light-reflecting pattern in the first region includes a first pattern portion disposed directly above the first light source and a second pattern portion disposed directly above the second light source, the thickness and/or the concentration of material in the first pattern portion being different from the thickness and/or the concentration of material in the second pattern portion.
2. The light source device according to claim 1 , wherein
the light-reflecting pattern in the first region is made of a resin containing a light-reflecting material.
3. The light source device according to claim 2 , wherein
the light-reflecting material is made of metal oxide particles.
4. The light source device according to claim 2 , wherein
the light-reflecting pattern in the second region is made of a fluorescent material, or a resin containing a light-reflecting material.
5. The light source device according to claim 4 , wherein
the light sources are arranged in a matrix, and
the thickness and/or the concentration of material of the light-reflecting pattern in the second region is greater than the thickness and/or the concentration of material of the light-reflecting pattern in a third region above a portion surrounded by four of the light sources.
6. The light source device according to claim 5 , wherein
the light transmissive member includes a light-diffusing plate.
7. The light source device according to claim 6 , wherein
the light-reflecting pattern is arranged on one surface of the light-diffusing plate.
8. The light source device according to claim 7 , wherein
the light transmissive member includes at least one selected from the group consisting of a wavelength-converting sheet, a prism sheet, and a polarizing sheet.
9. The light source device according to claim 8 , wherein
the light-reflecting material is made of metal oxide particles.
10. The light source device according to claim 9 , wherein
each of the light sources includes one or more light emitting elements and a light-reflecting film disposed on an upper surface of each of the one or more light emitting elements.
11. The light source device according to claim 10 , wherein
the substrate further has wall parts surrounding each of the light sources.
12. The light source device according to claim 11 , further comprising
a color-converting pattern arranged above the light-reflecting pattern.
13. The light source device according to claim 1 , wherein
the light-reflecting pattern in the second region is made of a fluorescent material, or a resin containing a light-reflecting material.
14. The light source device according to claim 1 , wherein
the light sources are arranged in a matrix, and
the thickness and/or the concentration of material of the light-reflecting pattern in the second region is greater than the thickness and/or the concentration of material of the light-reflecting pattern in a third region above a portion surrounded by four of the light sources.
15. The light source device according to claim 1 , wherein
the light transmissive member includes a light-diffusing plate.
16. The light source device according to claim 15 , wherein
the light-reflecting pattern is arranged on one surface of the light-diffusing plate.
17. The light source device according to claim 1 , wherein
the light transmissive member includes at least one selected from the group consisting of a wavelength-converting sheet, a prism sheet, and a polarizing sheet.
18. The light source device according to claim 1 , wherein
each of the light sources includes one or more light emitting elements and a light-reflecting film disposed on an upper surface of each of the one or more light emitting elements.
19. The light source device according to claim 1 , wherein
the substrate further has wall parts surrounding each of the light sources.
20. The light source device according to claim 1 , further comprising
a color-converting pattern arranged above the light-reflecting pattern.
21. The light source device according to claim 1 , wherein
each of the light sources has a thickness in a range of about 0.5 mm to about 2.0 mm.
22. The light source device according to claim 1 , wherein
a number of layers of the light-reflecting pattern in the first pattern portion is different from a number of layers of the light-reflecting pattern in the second pattern portion.