Patent ID: 6305812
Filing Date: 2001-10-23
Classification: G02B

Abstract:
A back light unit for a liquid crystal display (""LCD"") comprising:a lamp;a light guiding plate provided with the lamp on one side thereof and adapted to be directly fixed to a monitor frame;a lamp reflector having two edges which are fixed to an upper and a lower of a one side of the light guiding plate and surrounding the lamp so that a light emitted from the lamp is reflected toward the light guiding plate;a reflecting sheet attached to the lower of the light guiding plate for preventing a light leakage toward the lower of the light guiding plate and reflecting the light toward the upper of the light guiding plate; anda plurality of optical sheets attached to the upper of the light guiding plate for rendering the light uniform and converting the reflected light so as to direct the light perpendicular to a liquid crystal panel which is formed on the light guiding plate,the light guiding plate having four corners and a guiding rib formed on each corner of the light guiding plate supporting each corner of each optical sheet.