Patent ID: 7217004

Claim:
A backlight unit for a display device, said backlight unit comprising a plurality of Light Emitting Diode (LED) array modules arranged in a plurality of rows and columns, the LED array modules being arranged at regular intervals in each of the rows, each of LED array modules in a first row being located to face a space between two adjacent LED array modules in a second row in a relationship of two adjacent rows; each of said LED array modules comprising: a bar-shaped Printed Circuit Board (PCB) on which conductive patterns for transmitting power are formed; a base formed on the PCB and made of a heat conductive material; a plurality of LED chips mounted on the base in a line and electrically connected to the conductive patterns of the PCB; a reflector formed to surround the plurality of the LED chips and adapted to reflect light radiated from the plurality of LED chips upward; and a lens which is formed above the plurality of LED chips and the reflector, and has a bar shape; wherein said lens diffuses, in a horizontal direction, the light radiated from the plurality of LED chips and reflected by the reflector.