Patent ID: 7460196

Claim:
A backlight device for a liquid crystal display, comprising: a light-guiding plate disposed at a rear of a liquid crystal display panel of the liquid crystal display; a common substrate parallel to the light-guiding plate; a plurality of white, red, green, and blue light emitting diodes arranged on the common substrate; and a housing to concentrate white, red, green, and blue lights emitted from the plurality of light emitting diodes along one direction, wherein the common substrate is disposed at a rear of the housing, wherein the plurality of white, red, green, and blue light emitting diodes are sequentially disposed in an order of white, red, green, and blue, and each of the plurality of light emitting diodes has light-emitting portions disposed inside the housing and body portions disposed outside the housing such that the housing surrounds the light-emitting portions of the plurality of light emitting diodes, and wherein upper surface and one side surface of the light-emitting portions of the plurality of light emitting diodes are opposite to the housing, and other side surface of the light-emitting portions of the plurality of light emitting diodes is opposite to a light-incidence surface of the light-guiding plate.