Light adjustment module

A light adjustment module, suitable for being disposed on a transmission path of a light beam, and comprising:

• a housing, comprising a base and a cover connected to each other, and the cover having a light entrance;
• a moveable plate, disposed between the base and the cover, and the movable plate being configured to move relative to the housing along a moving direction;
• a single diffuser, disposed on the moveable plate and configured to move with the movable plate along the moving direction, and the single diffuser being disposed on the transmission path of the light beam from the light entrance;
• and
• a light sensor, disposed on the base to sense the light beam from the single diffuser;
• wherein
• the single diffuser has at least two regions arranged along the moving direction,
• and when the at least two regions of the single diffuser are respectively moved to the transmission path of the light beam, the light beam passing through the single diffuser has different brightness;
• and
• wherein the at least two regions respectively have different thicknesses in a light incident direction, the thicknesses of the at least two regions gradually change along the moving direction, and the light incident direction is perpendicular to the moving direction;
• or/and
• wherein the at least two regions respectively have different roughnesses, and roughnesses of the at least two regions gradually change along the moving direction.