Light emitting device including light emitting unit arranged in a tube
A light-emitting device includes a carrier with a first surface and a second surface opposite to the first surface; and a light-emitting unit disposed on the first surface and configured to emit a light toward but not passing through the first surface. When emitting the light, the light-emitting device has a first light intensity above the first surface, and a second light intensity under the second surface, a ratio of the first light intensity to the second light intensity is in a range of 2˜9.
1. A light-emitting device, comprising:
a carrier comprising a first portion and a second portion extended from the first portion;
a first electrode pad disposed on the first portion;
a plurality of light-emitting units disposed on the second portion;
a conductive line electrically connecting at least one of the plurality of light-emitting units and the first electrode pad;
a first reflective layer disposed on the conductive line without covering the plurality of light-emitting units; and
an optic structure comprising a wavelength converting material, contacting the plurality of light-emitting units without covering the first portion,
wherein the first portion is wider than the second portion in a top view.
2. The light-emitting device according to claim 1 , wherein the carrier has a top surface on which the plurality of light-emitting units is disposed, a bottom surface opposite to the top surface, a first light intensity measured above the top surface, and a second light intensity measured under the bottom surface, a ratio of the first light intensity to the second light intensity is in a range of 2 and 9.
3. The light-emitting device according to claim 1 , wherein the carrier includes a metallic material.
4. The light-emitting device according to claim 1 , wherein the carrier includes a ceramic material.
5. The light-emitting device according to claim 1 , wherein each of the plurality of light-emitting units has a light-emitting body and a reflective structure arranged in a configuration of reflecting light from the light-emitting body.
6. The light-emitting device according to claim 5 , wherein each of the plurality of light-emitting units has at least two electrodes, the reflective structure and the at least two electrodes are disposed on opposite sides of the light-emitting body.
7. The light-emitting device according to claim 5 , further comprising a transparent element disposed on the reflective structure.
8. The light-emitting device according to claim 1 , wherein the carrier comprises a third portion extended from the second portion and exposed from the optic structure.
9. The light-emitting device according to claim 1 , wherein the plurality of light-emitting units is connected in series-parallel.
10. The light-emitting device according to claim 1 , wherein the first electrode pad is not covered by the optic structure.
11. The light-emitting device according to claim 1 , further comprising a second electrode pad, wherein the first electrode pad and the second electrode pad are disposed on a same surface of the carrier.
12. The light-emitting device according to claim 1 , further comprising a second reflective layer, wherein the plurality of light-emitting units and the second reflective layer are disposed on opposite surfaces of the carrier.