23-05-2013 дата публикации
Номер: US20130128596A1
An LED bulb includes a connector for electrically connecting with a power supply, a heat sink disposed on the connector, and an LED mounted the heat sink. The heat sink has a first face and a second face opposite to the first face. The LED is attached on a first face of the base. The heat sink defines a plurality of through tunnels extending through the heat sink from the first face to the second face thereof. 1. An LED bulb comprising:a connector for being electrically connected to a power supply;a heat sink disposed on the connector, the heat sink having a first face and a second face opposite to the first face and adjacent to the connector; andat least an LED mounted on the first face of the heat sink;wherein the heat sink defines a plurality of through tunnels extending through the heat sink from the first face to the second face of the heat sink.2. The LED bulb as described in claim 1 , wherein the heat sink comprises a body claim 1 , and a plurality of fins extending outwardly from an outer circumference of the body.3. The LED bulb as described in claim 2 , wherein the through tunnels extend through the body of the heat sink.4. The LED bulb as described in claim 3 , wherein the fins are spaced from each other claim 3 , and an airflow passage is defined between every two adjacent fins.5. The LED bulb as described in claim 4 , wherein each of the through tunnels is located adjacent to a corresponding passage.6. The LED bulb as described in claim 1 , wherein the through tunnels are spaced from each other.7. The LED bulb as described in claim 1 , wherein the through tunnels are arranged along a circumferential direction of the heat sink.8. The LED bulb as described in claim 1 , wherein the heat sink is integrally made of ceramic.9. The LED bulb as described in claim 8 , wherein the ceramic is made a material selected from a group consisting of alumina claim 8 , silicate claim 8 , oxide claim 8 , carbide claim 8 , nitride claim 8 , sulfide and boride.10. The LED ...
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