US 12,271,106 B2
Variable aperture module, imaging lens module and electronic device
Te-Sheng Tseng, Taichung (TW); Chen Wei Fan, Taichung (TW); Ming-Ta Chou, Taichung (TW); and Kuan-Ming Chen, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Apr. 13, 2023, as Appl. No. 18/134,492.
Claims priority of provisional application 63/401,518, filed on Aug. 26, 2022.
Prior Publication US 2024/0069410 A1, Feb. 29, 2024
Int. Cl. G03B 9/22 (2021.01); G03B 9/24 (2021.01)
CPC G03B 9/22 (2013.01) [G03B 9/24 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A variable aperture module, comprising:
a blade assembly, comprising:
a plurality of movable blades, disposed around an optical axis to form a light passable hole with adjustable size for different hole size states, wherein each of the plurality of movable blades has an inner surface, and the inner surfaces of the plurality of movable blades are configured to define a contour of the light passable hole in each hole size state;
a positioning element, comprising:
a plurality of positioning structures, respectively corresponding to the plurality of movable blades; and
a driving part, comprising:
a rotation element, rotatable with respect to the positioning element, wherein the rotation element is configured to rotate the plurality of movable blades respectively with respect to the plurality of positioning structures to adjust a size of the light passable hole; and
at least two rollable elements, disposed around the optical axis, wherein the rotation element, the at least two rollable elements and a substrate are arranged along a direction parallel to the optical axis, and the at least two rollable elements are disposed between the rotation element and the substrate so as to support rotation of the rotation element;
wherein there are a plurality of matte structures disposed on each of the inner surfaces, the plurality of matte structures are regularly arranged around the optical axis, each of the plurality of matte structures is single structure extending towards the optical axis, such that of the contour of the light passable hole has an undulating shape at least in several hole size states.