Light-emitting apparatus
View Patent ↗The present application discloses a light-emitting apparatus having a light-emitting device and a wavelength conversion layer. The light-emitting device has a first top surface and a first side surface, and the wavelength conversion layer has a second top surface and a second side surface and covers the first top surface. A ratio of a distance between the first top surface to the second top surface and a distance between the first side surface and the second side surface is between 1.1˜1.3.
1. A light-emitting apparatus, comprising:
a light-emitting diode, comprising a first top surface and a first side surface; and
an outmost transparent cover covering the first top surface and having a second top surface and a second side surface,
wherein a ratio of a distance between the first top surface and the second top surface to a distance between the first side surface and the second side surface is between 1.1-1.3.
2. The light-emitting apparatus according to claim 1 , further comprising a transparent layer formed between the light-emitting diode and the transparent cover.
3. The light-emitting apparatus according to claim 1 , further comprising a carrier having a third top surface connected to a bottom side, which is opposite to the first top surface.
4. The light-emitting apparatus according to claim 3 , wherein the third top surface is a Lambertian scattering surface.
5. The light-emitting apparatus according to claim 1 , further comprising a lens arranged on the light-emitting diode, wherein the lens comprises a first wing and a second wing.
6. A light-emitting apparatus, comprising:
a light-emitting device;
a wavelength conversion layer covering the light-emitting device and having wavelength particles;
a first lens, having a top surface bent in a first direction, on the light-emitting device; and
a second lens, connected to the wavelength conversion layer, and having an inner surface bent in a second direction on the first lens,
wherein the first direction is different from the second direction, and
wherein the light-emitting apparatus has a first light extraction efficiency in the first direction and a second light extraction efficiency in the second direction, a difference between the first light extraction efficiency and the second light extraction efficiency is larger than 10 lm/W.
7. The light-emitting apparatus according to claim 6 , wherein the light-emitting apparatus is configured to provide a first optical property in the first direction and a second optical property different from the first optical property in the second direction.
8. The light-emitting apparatus according to claim 7 , wherein a difference between the first optical property and the second optical property is a color temperature difference less than 1000K.
9. The light-emitting apparatus according to claim 6 , wherein the wavelength conversion layer comprises a first wavelength conversion layer, a second wavelength conversion layer and a transparent layer, the transparent layer has a solid material and is sandwiched by the first wavelength conversion layer and the second wavelength conversion layer.