Light emitting module, lighting apparatus, and lighting fixture
View Patent ↗A light emitting module is provided in which color unevenness of illumination light is difficult to occur. An optical member formed from a translucent material having a refractive index higher than air is interposed between a first light emitting part and a second light emitting part. A side surface of the optical member has a region facing a first sealing member, and the region is at least partially in contact with a surface of the first sealing member. The side surface of the optical member has a region facing a second sealing member, and the region is at least partially in contact with a surface of the second sealing member. In plan view, an upper surface of the optical member does not substantially overlap either of an upper surface of a first light emitting element or an upper surface of a second light emitting element.
1. A light emitting module comprising:
a substrate;
a first linear light emitting part on an upper surface of the substrate, the first linear light emitting part including a plurality of first light emitting elements linearly arranged and a first linear sealing member sealing the plurality of the first light emitting elements on the substrate;
a second linear light emitting part on the upper surface of the substrate, the second linear light emitting part including a plurality of second light emitting elements linearly arranged on the substrate and a second linear sealing member sealing the plurality of the second light emitting elements on the substrate; and
an optical member interposed between the first linear light emitting part and the second linear light emitting part that are provided at spaced intervals on the substrate, wherein
the first linear light emitting part and the second light emitting part differ from each other in terms of luminescent color,
the first linear sealing member and the second linear sealing member are each composed of a translucent material that is mixed with a phosphor,
a translucent material defining the optical member differs from each of the respective translucent materials defining the first linear sealing member and the second linear sealing member in terms of refractive index by 0.04 or less, and
a side surface of the optical member includes a first region facing the first linear sealing member and a second region facing the second linear sealing member, the first region is at least partially in contact with a surface of the first linear sealing member, and the second region is at least partially in contact with a surface of the second linear sealing member.
2. The light emitting module of claim 1 , wherein
the first region included in the side surface of the optical member is entirely in surface contact with the surface of the first linear sealing member such that no gap is provided between the first region and the surface of the first linear sealing member, and
the second region included in the side surface of the optical member is entirely in surface contact with the surface of the second linear sealing member such that no gap is provided between the second region and the surface of the second linear sealing member.
3. The light emitting module of claim 1 , wherein
in a range between the first linear sealing member and the second linear sealing member, a lower surface of the optical member is in surface contact with the upper surface of the substrate such that no gap is provided between the lower surface of the optical member and the upper surface of the substrate.
4. The light emitting module of claim 1 , wherein
the translucent material defining the optical member is mixed with a light-scattering material.
5. The light emitting module of Claim 1 , wherein
the optical member, the first linear sealing member, and the second linear sealing member are composed of the same translucent material.
6. The light emitting module of claim 1 , wherein
the optical member is composed of a translucent material having a refractive index higher than air.
7. The light emitting module of claim 1 , wherein
in planar view, an upper surface of the first linear light emitting part and an upper surface of the second linear light emitting part extend beyond an upper surface of the optical member.
8. The light emitting module of claim 1 , wherein
a length of the first linear light emitting part and a length of the second linear light emitting part are on the same, and respective ends of the first linear light emitting part and the second linear light emitting part are aligned with each other.
9. The light emitting module of claim 1 , further comprising:
a frame provided on the upper surface of the substrate, wherein
the frame surrounds the first linear light emitting part and the second linear light emitting part, and
the optical member is disposed in an internal region of the frame.
10. The light emitting module of claim 9 , wherein
a height of the frame is greater than a height of the optical member, and the height of the frame is equal to a height of the first linear light emitting part and the second linear light emitting part.
11. The light emitting module of claim 1 , further comprising:
a circuit unit that supplies an electrical current to the first linear light emitting part and the second linear light emitting part, wherein
the first linear light emitting part and the second linear light emitting part are electrically parallel-connected to each other.
12. A lighting apparatus comprising the light emitting module of claim 1 .
13. A lighting fixture comprising the light emitting module of claim 1 .
14. A light emitting module comprising:
a substrate;
a first linear light emitting part on an upper surface of the substrate, the first linear light emitting part including a plurality of first light emitting elements linearly arranged and a first linear sealing member sealing the plurality of the first light emitting elements on the substrate;
a second linear light emitting part on the upper surface of the substrate, the second linear light emitting part including a plurality of second light emitting elements linearly arranged on the substrate and a second linear sealing member sealing the plurality of the second light emitting elements on the substrate; and
an optical member interposed between the first linear light emitting part and the second linear light emitting part that are provided at spaced intervals on the substrate, wherein
the first linear light emitting part and the second light emitting part differ from each other in terms of luminescent color,
the first linear light emitting part emits white light and the second linear light emitting part emits non-white light, and
a side surface of the optical member includes a first region facing the first linear sealing member and a second region facing the second linear sealing member, the first region is at least partially in contact with a surface of the first linear sealing member, and the second region is at least partially in contact with a surface of the second linear sealing member.
15. The light emitting module of claim 14 , wherein
the first region included in the side surface of the optical member is entirely in surface contact with the surface of the first linear sealing member such that no gap is provided between the first region and the surface of the first linear sealing member, and
the second region included in the side surface of the optical member is entirely in surface contact with the surface of the second linear sealing member such that no gap is provided between the second region and the surface of the second linear sealing member.
16. The light emitting module of claim 14 , wherein
in a range between the first linear sealing member and the second linear sealing member, a lower surface of the optical member is in surface contact with the upper surface of the substrate such that no gap is provided between the lower surface of the optical member and the upper surface of the substrate.
17. The light emitting module of claim 14 , wherein
the translucent material defining the optical member is mixed with a light-scattering material.
18. The light emitting module of claim 14 , wherein
the optical member is composed of a translucent material having a refractive index higher than air.
19. The light emitting module of claim 14 , wherein
in planar view, an upper surface of the first linear light emitting part and an upper surface of the second linear light emitting part extend beyond an upper surface of the optical member.
20. The light emitting module of claim 14 , wherein
a length of the first linear light emitting part and a length of the second linear light emitting part are on the same, and respective ends of the first linear light emitting part and the second linear light emitting part are aligned with each other.
21. The light emitting module of claim 14 , further comprising:
a frame provided on the upper surface of the substrate, wherein
the frame surrounds the first linear light emitting part and the second linear light emitting part, and
the optical member is disposed in an internal region of the frame.
22. The light emitting module of claim 21 , wherein
a height of the frame is greater than a height of the optical member, and the height of the frame is equal to a height of the first linear light emitting part and the second linear light emitting part.
23. The light emitting module of claim 14 , further comprising:
a circuit unit that supplies an electrical current to the first linear light emitting part and the second linear light emitting part, wherein
the first linear light emitting part and the second linear light emitting part are electrically parallel-connected to each other.
24. A lighting apparatus comprising the light emitting module of claim 14 .
25. A lighting fixture comprising the light emitting module of claim 12 .
26. A light emitting module comprising a first light emitting part and a second light emitting part that are provided at spaced intervals from one another on an upper surface of a substrate, the first light emitting part emitting light of white color and including a first light emitting element and a first sealing member sealing the first light emitting element, the second light emitting part emitting light of a color other than the white color and including a second light emitting element and a second sealing member sealing the second light emitting element, wherein
an optical member is interposed between the first light emitting part and the second light emitting part, and is formed from a translucent material having a refractive index higher than air,
a side surface of the optical member includes a first region facing the first sealing member and a second region facing the second sealing member, the first region is at least partially in contact with a surface of the first sealing member, and the second region is at least partially in contact with a surface of the second sealing member, and
in plan view, an upper surface of the optical member does not substantially overlap either an upper surface of the first light emitting element or an upper surface of the second light emitting element, wherein
the first linear light emitting part emits white light and the second linear light emitting part emits non-white light.
27. The light emitting module of claim 26 , further comprising:
a circuit unit that supplies an electrical current to the first light emitting part and the second light emitting part, wherein
the first light emitting part and the second light emitting part are electrically parallel-connected to each other.
28. The light emitting module of claim 26 , wherein
the first linear sealing member and the second linear sealing member are each composed of a translucent material that is mixed with a phosphor, and
the translucent material defining the optical member differs from each of the respective translucent materials defining the first linear sealing member and the second linear sealing member in terms of refractive index by 0.04 or less.
29. A lighting apparatus comprising the light emitting module of claim 26 .
30. A lighting fixture comprising the light emitting module of claim 26 .