| 摘要 |
An exemplary backlight module ( 4 ) includes a frame ( 44 ) and a light guide plate ( 40 ) received in the frame. The light guide plate has a top light emitting surface ( 404 ). The frame and an end ( 408 ) of the light guide plate cooperatively define a gap ( 46 ) therebetween. The gap has a narrowed exit ( 462 ) adjacent to the light emitting surface, whereby light beams are prevented from either or both of leaking out from the end of the light guide plate and leaking out from the gap via the narrowed exit.
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