| 摘要 |
PURPOSE: An LED lamp is provided to improve cooling effect by increasing a contact area with external air through a plurality of inner and outer pins. CONSTITUTION: A plurality of LED packages are mounted on a substrate. A heat sink device(300) is arranged under the substrate to discharge heat from a plurality of LED packages. The heat sink device includes an inner cylinder(310), a plurality of inner pins(330), an outer cylinder(320), and a plurality of outer pins(340). The inner and outer cylinders have a hollow shape. The plurality of inner pins are radially formed on the outer circumference of the inner cylinder. The plurality of outer pins are radially formed on the outer circumference of the outer cylinder. |
