Patent ID: 7758223
Filing Date: 2010-07-20
Classification: F21K,F21V,F21Y,H05B,Y02B

Abstract:
1. A lamp comprising: an outer shell, the outer shell including a cylindrical peripheral wall with a heat radiating surface and a light source support that closes one end of the peripheral wall, the light source support having a flat supporting surface and being formed integrally with the heat radiating surface by a material with heat conductivity; a base coupled to the outer shell; a light source supported on the light source support, the light source including (i) a circuit wiring board having a first surface and a second surface, the second surface opposite the first surface; (ii) a plurality of heat generating light-emitting elements mounted in intervals on the first surface of the circuit wiring board; and (iii) a thermal diffusion layer stacked on the second surface of the circuit wiring board, wherein an entire area of the thermal diffusion layer faces the flat supporting surface; a screw which fixes the circuit wiring board of the light source to the flat supporting surface, wherein the screw penetrates the circuit wiring board and secures into the light source support, thereby interposing the thermal diffusion layer between the circuit wiring board and the light source support and thermally connecting the entire area of the thermal diffusion layer to the flat supporting surface to transmit heat of the light-emitting elements from the circuit wiring board to the light source support through the thermal diffusion layer; and a cover, the cover being held on one end of the outer shell, the cover covering the light source, and the heat radiating surface of the outer shell and the cover being exposed on the outside of the lamp.