Abstract: A backlight module includes a front frame, a backboard, and a light source. The front frame and the backboard define opposite outermost surfaces of the backlight module. The backboard includes a frame and a light-shield plate. The frame is coupled with the front frame. The frame has a plurality of plates surroundingly defining an empty part and at least one side wall extending from one of the plates to be coupled with the front frame. Each one of the plates has a first surface, a second surface opposite to the first surface, and at least one rib and/or trough, and the rib and/or trough is disposed on the first surface and is spaced apart from the side wall. The light-shield plate covers the empty part. The light source is disposed between the front frame and the backboard.

Abstract: A backlight module includes a front frame, a backboard, and a light source. The front frame and the backboard define opposite outermost surfaces of the backlight module. The backboard includes a frame and a light-shield plate. The frame is coupled with the front frame. The frame has a plurality of plates surroundingly defining an empty part and at least one side wall extending from one of the plates to be coupled with the front frame. Each one of the plates has a first surface, a second surface opposite to the first surface, and at least one rib and/or trough, and the rib and/or trough is disposed on the first surface and is spaced apart from the side wall. The light-shield plate covers the empty part. The light source is disposed between the front frame and the backboard.

Abstract: A backboard adapted on the backside of a backlight module is provided. The backlight module comprises a backboard, a front frame, a light source structure and a group of optical films. The backboard comprises a frame means having an empty central part and a light-shield plate covering the empty central part. The frame means further comprises at least one support means. The front frame is connected to the backboard to form an inner space. The light source structure is placed on the backboard in the inner space. And the group of optical films is placed on the light source structure and in the inner space.