Imaging lens assembly module, camera module and electronic device

An imaging lens assembly module, comprising:

• an imaging lens assembly having an optical axis;
• and
• a variable aperture module disposed on an object side of the imaging lens assembly, the optical axis passing through a center of the variable aperture module, and the variable aperture module comprising:
• a light blocking sheet set comprising at least two light blocking sheets, wherein the at least two light blocking sheets are mutually stacked along a circumferential direction surrounding the optical axis to form a variable aperture opening;
• a fixed element indirectly or directly connected to the light blocking sheet set, and the fixed element having a sidewall structure and an annular light blocking portion, wherein the annular light blocking portion extends toward the optical axis along a direction perpendicular to the optical axis, and the annular light blocking portion surrounds the optical axis to form a fixed aperture opening;
• and
• a movable element connected to the light blocking sheet set;
• wherein the sidewall structure of the fixed element extends from an image side to the object side of the imaging lens assembly;
• wherein the movable element drives the light blocking sheet set to move relative to the fixed element, so that an aperture size of the variable aperture opening is variable;
• wherein a focal length of the image lens assembly is EFL, a diameter of the fixed aperture opening is Df, a maximum outer diameter of the sidewall structure of the fixed element is Ds, and the following conditions are satisfied:
• 0.5<EFL/Df<5.2;
• and
• Df<Ds.