Light-emitting module
A light-emitting module includes: a light guide plate having a first surface on which a plurality of first recesses arranged in rows and columns and a grid-shaped groove portion surrounding each of the plurality of first recesses are provided, and a second surface located on the opposite side from the first surface; a plurality of light-emitting elements each disposed inside a corresponding one of the plurality of first recesses; a first light transmission member disposed inside the groove portion of the light guide plate, and having a refractive index lower than a refractive index of the light guide plate; and a reflective resin layer covering the first surface of the light guide plate and the first light transmission member.
1. A light-emitting module comprising:
a light guide plate having a first surface on which a plurality of first recesses arranged in rows and columns and a grid-shaped groove portion surrounding each of the plurality of first recesses are provided, and a second surface located on an opposite side from the first surface;
a plurality of light-emitting elements each disposed inside a corresponding one of the plurality of first recesses of the light guide plate;
a first light transmission member disposed inside the groove portion of the light guide plate, and having a refractive index lower than a refractive index of the light guide plate; and
a reflective resin layer covering the first surface of the light guide plate and the first light transmission member,
wherein the first light transmission member comprises a resin material.
2. The light-emitting module according to claim 1 , wherein
the second surface of the light guide plate has a plurality of light diffusion structures, and
each of the plurality of light diffusion structures is arranged on an opposite side from a corresponding one of the plurality of first recesses.
3. The light-emitting module according to claim 2 , wherein
each of the plurality of light diffusion structures is a second recess.
4. The light-emitting module according to claim 1 , wherein
the groove portion includes a plurality of sloped surfaces extending in the rows and the columns.
5. The light-emitting module according to claim 2 , wherein
the groove portion includes a plurality of sloped surfaces extending in the rows and the columns.
6. The light-emitting module according to claim 3 , wherein
the groove portion includes a plurality of sloped surfaces extending in the rows and the columns.
7. The light-emitting module according to claim 1 , wherein
the groove portion is a set of round grooves extending in the rows and the columns.
8. The light-emitting module according to claim 2 , wherein
the groove portion is a set of round grooves extending in the rows and the columns.
9. The light-emitting module according to claim 3 , wherein
the groove portion is a set of round grooves extending in the rows and the columns.
10. The light-emitting module according to claim 1 , wherein
each of the plurality of first recesses has a bottom surface and one or more lateral surfaces,
each of the plurality of light-emitting elements has an upper surface and an electrode located on an opposite side from the upper surface,
the light-emitting module further comprises:
a wavelength conversion member disposed between the bottom surface of each of the plurality of first recesses and the upper surface of a corresponding one of the plurality of light-emitting elements; and
a light reflective member covering a lateral surface of the light-emitting element inside each of the plurality of first recesses, and
a lower surface of the electrode of each of the plurality of light-emitting elements is exposed from the light reflective member.
11. The light-emitting module according to claim 2 , wherein
each of the plurality of first recesses has a bottom surface and one or more lateral surfaces,
each of the plurality of light-emitting elements has an upper surface and an electrode located on an opposite side from the upper surface,
the light-emitting module further comprises:
a wavelength conversion member disposed between the bottom surface of each of the plurality of first recesses and the upper surface of a corresponding one of the plurality of light-emitting elements; and
a light reflective member covering a lateral surface of the light-emitting element inside each of the plurality of first recesses, and
a lower surface of the electrode of each of the plurality of light-emitting elements is exposed from the light reflective member.
12. The light-emitting module according to claim 3 , wherein
each of the plurality of first recesses has a bottom surface and one or more lateral surfaces,
each of the plurality of light-emitting elements has an upper surface and an electrode located on an opposite side from the upper surface,
the light-emitting module further comprises:
a wavelength conversion member disposed between the bottom surface of each of the plurality of first recesses and the upper surface of a corresponding one of the plurality of light-emitting elements; and
a light reflective member covering a lateral surface of the light-emitting element inside each of the plurality of first recesses, and
a lower surface of the electrode of each of the plurality of light-emitting elements is exposed from the light reflective member.
13. The light-emitting module according to claim 10 , further comprising:
a plurality of second light transmission members, a portion of each of the plurality of second light transmission members being located inside a corresponding one of the plurality of first recesses,
wherein
each wavelength conversion member is held on the bottom surface of each of the plurality of first recesses by a corresponding one of the plurality of second light transmission members.
14. The light-emitting module according to claim 13 , wherein
the reflective resin layer further covers the plurality of second light transmission members.
15. The light-emitting module according to claim 1 , wherein
the light guide plate has a rectangular outer shape as seen in a plan view.
16. The light-emitting module according to claim 2 , wherein
the light guide plate has a rectangular outer shape as seen in a plan view.
17. The light-emitting module according to claim 3 , wherein
the light guide plate has a rectangular outer shape as seen in a plan view.
18. A surface-emission light source comprising:
a plurality of the light-emitting modules according to claim 1 ,
wherein
the plurality of the light-emitting modules are arranged in a two-dimensional array.
19. A surface-emission light source comprising:
a plurality of the light-emitting modules according to claim 2 ,
wherein
the plurality of the light-emitting modules are arranged in a two-dimensional array.
20. A surface-emission light source comprising:
a plurality of the light-emitting modules according to claim 3 ,
wherein
the plurality of the light-emitting modules are arranged in a two-dimensional array.