Variable aperture device for camera module and product comprising same

By designing a variable aperture device including a base, a main blade, a supplementary blade and an actuator, the problem that the variable aperture device in the prior art is difficult to take into account between miniaturization and high reliability, and the effect of smaller size and high reliability is achieved.

CN119731591AActive Publication Date: 2025-03-28HUAWEI TECH CO LTD
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Patent Information

Application Number
CN202280099137.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2022-08-15
Publication Date
2025-03-28
Estimated Expiration
2042-08-15

AI Technical Summary

Technical Problem

Existing variable aperture devices are difficult to balance between miniaturization and high reliability, especially under the demand for large aperture diameters, the device size is increased and the blade stroke is limited.

Method used

A variable aperture device including a base, main blade, supplementary blade and actuator is designed to achieve compact arrangement and effective drive of the blades through sliding motion and cam groove structure, ensuring accurate definition of aperture shape in open and closed states.

Benefits of technology

A variable aperture device with smaller size and high reliability is achieved, which can adapt to the needs of large aperture diameters while maintaining high optical performance.

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Abstract

The invention relates to a variable aperture device (10) for a camera module (1a). The device (10) comprises: a base (100), where the base (100) has a base aperture (110) and a pair of vane guides (120a, 120b); a pair of main blades (200a, 200b), in which the pair of main blades (200a, 200b) are guided by the blade guides (120a, 120b); a pair of supplemental blades (300a, 300b) wherein the pair of supplemental blades (300a, 300b) are guided by the blade guides (120a, 120b); a cover (400), in which the cover (400) is fixed to the base (100) and has a cover aperture (410); and an actuator (500), where the actuator (500) is configured to move the main blade (200a, 200b) and the supplementary blade (300a, 300b) relative to the base (100). Each of the main blades (200a, 200b) has a respective notch (210a, 210b). The recesses (210a, 210b) cooperatively define a central aperture (A1) and a fixed aperture (A2). Each of the supplemental blades (300a, 300b) has a respective notch (310a, 310b). The recesses (310a, 310b) cooperatively define a minimum aperture (A3) and a maximum aperture (A4). When the pair of main blades (200a, 200b) are closest to each other and the pair of supplementary blades (300a, 300b) are closest to each other, each of the supplementary blades (300a, 300b) is adapted to project outwardly from a lateral edge (230a, 230b) of the main blades (200a, 200b) perpendicular to a longitudinal edge (130a, 130b) of the base (100).
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