Liquid crystal display and backlight module thereof

Abstract

A backlight module including a first frame, a light guide plate, and a light source is provided. The inner surface of the first frame has at least a first reflection area. In addition, the light guide plate is disposed in the first frame and located beside the first reflection area, and the light guide plate has a light incident surface. Moreover, the light source is disposed in the first frame and between the first reflection area and the light incident surface. A liquid crystal display using the backlight module is also provided.

1 . A backlight module, comprising:
 a first frame, comprising at least a first reflection area on an inner surface thereof;   a light guide plate, disposed in the first frame and located beside to the first reflection area, wherein the light guide plate has a light incident surface;   a light source, disposed in the first frame and between the first reflection area and the light incident surface;   an optical film, disposed on the first reflection area of the first frame, beside the light incident surface, and between the light source and the first frame, wherein the light incident surface faces the optical film, and the optical film is a brightness enhancement film or a prism sheet; and   an optical film set disposed above the light guide plate, wherein the light guide plate is disposed between the first frame and the optical film set, and the optical film is separate from the optical film set.   
     
     
         2 . The backlight module of  claim 1 , further comprising a second frame disposed on the first frame, wherein the second frame comprises an opening to expose the light guide plate, and an inner surface of the second frame comprises at least one second reflection area. 
     
     
         3 . The backlight module of  claim 2 , comprising the optical film further disposed on the first reflection area of the first frame and the second reflection area of the second frame. 
     
     
         4 . The backlight module of  claim 1 , wherein the optical film set at least comprises a diffuser film, a prism sheet or a brightness enhancement film, or a combination thereof. 
     
     
         5 . The backlight module of  claim 1 , further comprising a reflector disposed between the optical film and the first reflection area of the first frame. 
     
     
         6 . A liquid crystal display comprising:
 the backlight module of  claim 1 ; and   a liquid crystal panel, disposed above the light guide plate.