A backlight module (1) has a light guiding device (2) and a light source (200). The light guiding device has a single light guide plate (20), and a reflection member (26). The single light guide plate has a light incidence surface (211), a top light emitting surface (23), and an opposite bottom light...http://www.google.ca/patents/US7226200?utm_source=gb-gplus-sharePatent US7226200 - Light guiding device with two opposite light emitting surfaces and backlight module using the same
