Patent ID: 8888314
Filing Date: 2014-11-18
Classification: F21S,F21V,F21Y

Abstract:
1. A lighting apparatus using light emitting diodes (LEDs), the lighting apparatus comprising: a housing having a power supply accommodation space therein; a heat radiation unit that comprises an LED module accommodation groove that is installed on a top of the housing and having at least one inclined surface or mounting surface on which an LED module is mounted, and a number of fins that are formed on an outer circumferential surface of the LED module accommodation groove; a power supply that is installed in the power supply accommodation space of the housing; an air circulation path that is lengthily formed between the housing and the heat radiation unit; a pair of covers that are combined at both side ends of the housing and heat radiation unit, and on each of which an air vent hole that performs air circulation at both side ends of the air circulation path is respectively formed; a number of the LED modules that are respectively mounted on a top of a metal printed circuit board (PCB) that is installed on the inclined surface or mounting surface of the LED module accommodation groove; and a light transmission plate that is combined on a top of the heat radiation unit and transmits light emitted from the LED modules, wherein the air circulation path has a cross-section being gradually smaller towards one of the air vent holes from the other one thereof, in order for a heated-up air inside the air circulation path to create directional flow of the heated-up air.