Camera module and portable electronic device

Abstract

The invention provides a camera module group, comprising a lens driving device, a lens group driven by the lens driving device and a photosensitive component faced to the lens. Whereinto, the lens driving device comprises a stator and a rotator. Several first conductors are set at one end face of the rotator in interval. The camera module group comprises at least a pulse generating device and a processing device for pulse signal connected with the pulse generating device. The pulse generating device can be connected with first conductors in current intermittently in the rotating process of stator. When the connection state between the pulse generating device and first conductors changes the pulse generating device generates pulse and transmits the pulse signal to the processing device for pulse signal for processing to obtain position information of rotator on the optical axial direction of lens group. The camera module group can know the position of lens group on the optical axial direction in time during the focusing process so that focusing time can be shortened effectively and step loss of lens driving device can be decreased. The invention also provides a portable electric device with the camera module group.

Description

technical field [0001] The invention relates to camera technology, in particular to a camera module and a portable electronic device with the camera module. Background technique [0002] With the development of camera technology, camera modules are widely used in camera devices for various purposes. The combination of camera modules and various portable electronic devices such as mobile phones, video cameras, computers, etc. is favored by many consumers. . [0003] The camera module usually includes a driving motor, at least one lens group driven by the driving motor, and a photosensitive element opposite to the lens group. The lens group may include one or more lenses, the lenses are arranged opposite to the photosensitive element, and the center point of the photosensitive element is located on the optical axis of the one or more lenses. When focusing, use the drive motor to drive the relative displacement of the lens group and the photosensitive element to find a focus ...

AI Technical Summary

Problems solved by technology

The relative movement of the lens and the photosensitive element is the focusing stroke of the lens and the photosensitive element. Usually, when focusing, the stepping motor will drive the lens or the photosensitive element to gradually step from the starting position of the focusing stroke to an end position. However, the stepping motor During the stepping process, the motor always needs to judge whether it can step forward again, and it is impossible to know whether the lens or photosensitive element has reached the starting position or the ending position accurately and in time, which will consume the running time of focusing, and the stepping motor There may also be a problem of out-of-sync during this repeated movement

Images