Light adjustment and the use thereof diaphragm backlight module

The present invention discloses an optical adjustment film comprising a substrate layer and a first light adjustment structure. A substrate having a first surface and a second surface opposite to the. The first light adjustment layer structure disposed on the first surface of the substrate. The first light adjustment layer structure comprises a plurality of light restructuring. Each light adjustment structure having a major axis, minor axis and thickness, and the long axis parallel to the extending direction of the optical adjustment structure. Minor length ratio of the length of the major axis is between 0.093 to 0.6, a thickness of between 2 microns to 6 microns. The present invention for adjusting an optical film of the backlight module can achieve a high luminance and a large effect of viewing angle.