JP2019083217A5 - - Google Patents

Claims (15)

A substrate,
A plurality of light sources located on the substrate;
A light diffusing plate;
A half mirror positioned between the light diffusing plate and the plurality of light sources of the substrate;
A scattering reflection portion located between the substrate and the light diffusing plate and above at least a part of an emission surface of the plurality of light sources;
Equipped with a,
The scattering reflection portion includes a resin and particles dispersed in the resin,
The scattering reflection section includes an exit surface of each light source in a top view and is located in a region larger than the exit surface, and the density of the particles in the top view of the region is the exit surface of each light source. The light emitting device has a lower density in the second portion located in the vicinity of the first portion immediately above the first portion . The light-emitting device according to claim 1, wherein the scattering reflection unit is located on an upper surface or a lower surface of the half mirror. The light-emitting device according to claim 1, wherein the scattering reflection part is located on a lower surface of the light diffusion plate. The light-emitting device according to claim 1, further comprising: a partition member having a plurality of regions formed by a wall portion having a top portion and surrounding each of the plurality of light sources on the substrate. The light-emitting device according to claim 4, wherein the scattering reflection part is not located above the top part of the sorting member. The light emitting device according to claim 4, wherein the half mirror is disposed in contact with one or more top portions of the sorting member. The light-emitting device according to claim 4, wherein the half mirror is fixed by one or more top portions of the partition member and a connection member. The light-emitting device according to claim 1, wherein each light source has a batwing-type light distribution characteristic. The light emitting device according to claim 1, wherein the half mirror has a dielectric multilayer film. 10. The light emitting device according to claim 1, wherein, in the reflectance characteristics in the vertical direction of the half mirror, a band on a longer wavelength side than a light emission peak wavelength of the light source is wider than a band on a short wavelength side. 11. The light emitting device according to claim 1, wherein a reflectance of the half mirror at the time of vertical incidence is 30% or more and 75% or less with respect to an emission wavelength band of the light source. The light emitting device according to claim 1, wherein a distance between the half mirror and the substrate is 0.2 times or less a distance between adjacent light sources among the plurality of light sources. 13. The light-emitting device according to claim 1, wherein each light source has a light distribution characteristic in which a light amount with an elevation angle of less than 20 ° with respect to a horizontal direction is 30% or more of a total light amount. The light diffusion plate further includes a wavelength conversion layer that is located on the opposite side to the side where the half mirror is located, absorbs light from the light source, and emits light having a wavelength different from that of the light from the light source. The light-emitting device according to claim 1. The light emitting device according to claim 14, further comprising a dichroic layer positioned between the wavelength conversion layer and the half mirror and having a higher reflectance at a wavelength of light emitted from the wavelength conversion layer than an emission wavelength of the light source.