Backlight module group

The utility model relates to a backlight module group, including a light guide plate and an optical coupling module, the optical coupling module includes a light emitting source and an optical collector, the side that one of light guide plate is used for receiving the light source is for going into the plain noodles, the light emitting source is located optical collector one side, with the non - direct coupling in income plain noodles of light guide plate, the optical collector includes a collimating lens and a free -form surface reflector, the optical collector set up in the light emitting source with between the light guide plate, be used for with light beam that the light emitting source sent collect, contract restraint and assemble to the income plain noodles of light guide plate. The utility model discloses having changed among the traditional system light emitting source direct coupling to the light route of light guide plate, having adopted the optical coupling module that proposes, the light that the light emitting source sent is collected, is contracted through the optical collector earlier and restraints and assemble, and the income plain noodles of light guide plate is gone into in recoupling for the thickness of side income formula light guide plate no longer is subject to the cross -sectional width of light emitting source, has guaranteed the high efficiency of light energy utilization of system when realizing backlight module group's slimming.