Lens driving apparatus

By employing alternating linear motors and curved coils in the lens drive device, the problems of increased lens size and decreased performance were solved, achieving miniaturization and stable performance of the device.

CN122180908APending Publication Date: 2026-06-09CANON KK
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202480071687.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-03-12
Filing Date
2024-08-21
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

When existing linear motors drive the lens barrel, the lens size increases and optical performance and moving image capture performance decrease.

Method used

At least two linear motors are used, each motor including first and second coils and a Halbach array magnet assembly. The coils are arranged along the optical axis of the lens, and at least one coil has a curved portion. They are arranged alternately to reduce the lens size and suppress the degradation of optical performance and moving image capture performance.

Benefits of technology

This achieved a reduction in the size of the lens driving device and suppressed the degradation of optical performance and moving image capture performance.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure FT_1
    Figure FT_1
  • Figure FT_2
    Figure FT_2
  • Figure FT_3
    Figure FT_3
Patent Text Reader

Abstract

[Problem] To provide a lens driving apparatus that is compact and capable of suppressing degradation of optical and video performance. [Solution] The lens driving apparatus includes at least one lens, a lens barrel that holds the lens, and N (N is an integer of 2 or more) linear motors in the lens barrel, each of which is composed of a first coil and a second coil that generate a driving force in a direction parallel to an optical axis of the lens and a magnet assembly that forms a Halbach array. At least one of the first coil and the second coil is provided with a curved portion. The linear motors are arranged at intervals of 360 / N degrees in a circumferential direction around the optical axis of the lens.
Need to check novelty before this filing date? Find Prior Art