Camera module, focusing method and control device

By detecting the position of the lens assembly using a pneumatic component, the operational issues of the Hall sensor and grating sensor under temperature changes are resolved, resulting in improved focusing accuracy and reduced camera module size, making it suitable for camera modules in electronic devices.

CN117793500BActive Publication Date: 2026-07-24VIVO MOBILE COMM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
VIVO MOBILE COMM CO LTD
Filing Date
2023-12-26
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing camera modules, Hall sensors and grating sensors can affect the operation of electronic devices when the temperature changes, and Hall sensors require magnetic components and additional light sources, which take up space.

Method used

A pneumatic component is connected to the lens assembly and drive assembly. The position of the lens assembly is detected by the pneumatic component, and the pressure value of the gaseous medium is used to provide feedback on the positional change of the lens assembly. This avoids the use of magnetic components and light sources, thereby improving focusing accuracy.

Benefits of technology

Improve focusing accuracy in environments with temperature variations, reduce camera module size and power consumption, simplify internal structure, and expand application scenarios.

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  • Figure CN117793500B_ABST
    Figure CN117793500B_ABST
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Abstract

The application discloses a camera module, a focusing method and a control device. The camera module comprises a base, a shell, a driving assembly, a chip assembly, a lens assembly and a gas pressure component. The shell is connected with the base. An opening is arranged on the side of the shell away from the base. The driving assembly is arranged in the shell. The chip assembly is arranged in the shell and located on the side of the driving assembly close to the base. The lens assembly is connected with the driving assembly and opposite to the opening. The driving assembly drives the lens assembly to move away from or close to the chip assembly. The gas pressure component is connected with the chip assembly and the driving assembly. When the distance between the lens assembly and the chip assembly is a first distance, the pressure of the gas pressure component is a first pressure value. When the distance between the lens assembly and the chip assembly is a second distance, the pressure of the gas pressure component is a second pressure value.
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