| 摘要 |
A backlight module comprises: a light emitting device; a light guide plate that has a plurality of light guide prisms; a first prism assembly that comprises a first base body and a plurality of first prisms arranged on the light emergent surface of the first base body; a second prism assembly that comprises a second base body and a plurality of second prisms, wherein the extending direction of the second prisms is vertical to that of the first prisms. By way of the light guide prisms of the light guide plate extending in the parallel direction to the extending direction of the first prisms, the light beam with a large angle propagating through the light guide plate will not be guided out by the prisms near the light incident side, so as to increase the light mixing area and subsequently avoid the presence of alternately dark and bright hotspot. |
