Patent ID: 7221416
Filing Date: 2007-05-22
Classification: G02B

Abstract:
1. A Liquid Crystal Display (LCD) backlight apparatus for an LCD, said backlight apparatus comprising: a light guide plate adapted to be placed under an LCD panel of the LCD to guide light to the LCD panel, the light guide plate having an even upper surface and a scattering pattern formed on a bottom surface thereof; and a plurality of monochromatic light sources placed in line at a side of the light guide plate to radiate light along the plane direction of the light guide plate between the upper and bottom surfaces of the light guide plate; wherein the light sources are adapted to radiate light beams at a predetermined beam angle so that the light beams reach the scattering pattern only after having propagated a predetermined reference length necessary for forming white light when the light beams are mixed together; and each of the monochromatic light sources includes a Light Emitting Diode (LED) chip and an LED lens for directing light emitted from the LED chip at predetermined upward and downward beam angles into the light guide plate.