Patent ID: 9482805
Filing Date: 2016-11-01
CPC Classification: G02B,G02F

Claim Text:
1. A backlight module, which comprises: a light-guiding plate, a frame and a plurality of light sources; the plurality of light sources being disposed near an incident surface of the light-guiding plate, the backlight module further comprising an opaque layer, one part of the opaque layer being attached to the frame, and the other part being disposed on a light-emitting surface of the light-guiding plate; the opaque layer shielding and absorbing partial light emitted directly from the plurality of the light sources and light from the light-emitting surface covered by the opaque layer; a second part of the opaque layer comprising black plastic and has a width satisfying the following equation: d>T*tan(arcsin(1/n)) wherein d is the width of the second part of the opaque layer comprising black plastic; T is the thickness of the light guiding plate; and n is the index of refraction of the light-guiding plate.