Patent ID: 7932966

Claim:
A backlight device for a liquid crystal display, comprising: a main light-guiding plate disposed at a rear of a liquid crystal panel of the liquid crystal display; at least one sub light-guiding plate disposed at a rear of the main light-guiding plate and spaced from the main light-guiding plate; at least one light source disposed along one side of the sub light-guiding plate, the light source includes a plurality of light emitting diodes in order of white, red, green, and blue; a housing adjacent to the light-guiding plate for concentrating white, red, green, and blue light emitted from the light source along a first light direction, the housing is opposite to an incident surface along one side of the main light-guiding plate, both sides of the sub light-guiding plate, and a rear surface of the sub light-guiding plate; and first and second reflecting plates disposed under the main light-guiding plate for reflecting light leaking along a side of the liquid crystal display panel opposite to the main light-guiding plate and the sub light-guiding plate.