Patent ID: 6767113
Filing Date: 2004-07-27
Classification: F21V,G02F

Abstract:
A multi-angle reflector for use in a backlight unit which is disposed under a liquid crystal panel in the liquid crystal display device, in which the backlight unit has a plurality of lamps disposed above the reflector and a diffuser disposed above the lamps, the multi-angle reflector comprising:a plate, having a top surface facing the lamps; a plurality of reflecting protrusions, each disposed on the top surface of the plate and having a reflecting surface, the reflecting surfaces of the reflecting protrusions having respective reflecting angles with respect to the top surface of the plate so that lights coming from the lamps are adapted to reflect to the diffuser according to the reflecting angles, wherein the reflecting angle of the reflecting surface is âˆ’1 (a/c)âˆ’&bgr;/2, wherein &thgr; is the reflecting angle between the reflecting surface of the reflecting protrusion and the top surface of the plate, a is the vertical height between the center of the lamp and the center of the reflecting surface of the protrusion, c is the horizontal distance between the center of the lamp and the center of the reflecting surface of the protrusion, and &bgr; is the angle between the reflected light and the plane vertical to the top surface.