Lighting device and lamp comprising same

A lighting device comprising:

• a reflective layer;
• a first resin layer disposed on the reflective layer;
• a substrate including a light-transmitting material and disposed on the first resin layer;
• a plurality of light emitting devices disposed between the first resin layer and the substrate;
• a second resin layer disposed on the substrate;
• a half mirror layer disposed on the second resin layer;
• and
• an optical member disposed between the reflective layer and the first resin layer,
• wherein the plurality of light emitting devices is spaced apart from each other on a lower surface of the substrate,
• wherein the substrate is disposed between the first resin layer and the second resin layer,
• wherein the second resin layer is disposed between the substrate and the half mirror layer,
• wherein light emitted through a light emitting surface of each of the plurality of light emitting devices includes light in a visible light wavelength band, passes through the optical member and is reflected by the reflective layer to pass through the substrate,
• wherein the light in the visible light wavelength band includes a first wavelength band, and a second wavelength band having a different wavelength band from the first wavelength band,
• wherein the half mirror layer has a reflectance of light in the first wavelength band higher than a transmittance of light in the first wavelength band,
• wherein the optical member has a higher transmittance for light in the first wavelength band than transmittance for light in the second wavelength band, and
• wherein a thickness of the second resin layer is smaller than a thickness of the first resin layer.

A lighting device comprising:

• a reflective layer;
• a first resin layer disposed on the reflective layer;
• a substrate including a light-transmitting material and disposed on the first resin layer;
• a plurality of light emitting devices disposed between the first resin layer and the substrate;
• a second resin layer disposed on the substrate;
• and
• a half mirror layer disposed on the second resin layer;
• wherein light emitted through a light emitting surface of each of the plurality of light emitting devices includes light in a visible light wavelength band, is reflected by the reflective layer and passes through the substrate,
• wherein the light emitting device includes first to third light emitting devices disposed adjacent to each other and forming a unit light emitting group,
• wherein the first light emitting device emits red light,
• wherein the second light emitting device emits green light,
• wherein the third light emitting device emits blue light,
• wherein the light in the visible light wavelength band includes a first wavelength band, and a second wavelength band having a different wavelength band from the first wavelength band,
• wherein the half mirror layer has a reflectance of light in the first wavelength band higher than a transmittance of light in the first wavelength band,
• wherein the substrate is disposed between the first resin layer and the second resin layer,
• wherein the second resin layer is disposed between the substrate and the half mirror layer,
• wherein the first to third light emitting devices are disposed on a lower surface of the substrate,
• wherein a thickness of the second resin layer is smaller than a thickness of the first resin layer.