Axis-shift optical anti-shake lens drive device

Abstract

A tilt-shift optical anti-jitter lens driving device comprises a carrier, a shell, an upper reed, a lower reed, at least N permanent magnets, a focusing excitation coil and an anti-jitter excitation coil, wherein the carrier is used for being combined with a lens unit, the shell is used for containing the carrier; the upper reed is used for elastically connecting the upper portion of the carrier into the shell; the lower reed is used for elastically connecting the lower portion of the carrier into the shell; the N permanent magnets with the N larger than or equal to three are distributed at an equal interval around the axis of an inner barrel and face the carrier with the same polarity; the focusing excitation coil is wound on the outer edge of the carrier, and the plane of the focusing excitation coil is perpendicular to the axis of the inner barrel; the anti-jitter excitation coil is fixed to the outer edge of the carrier, the plane of the anti-jitter excitation coil is parallel to the end face of the permanent magnet corresponding to the anti-jitter excitation coil, and the upper portion or the lower portion of the anti-jitter excitation coil is within the height range of the permanent magnets. Because the current of the focusing excitation coil is controlled to make the carrier linearly move along an optical axis in an adjusted mode, automatic focusing of a lens unit can be achieved; because the current of anti-jitter excitation coil is controlled to make the carrier deviate from the optical axis and deflect by a certain angle in any direction in an adjusted mode, the anti-jitter purpose of the lens unit can be achieved.

Description

technical field [0001] The invention relates to an anti-shake device applied to camera equipment, in particular to an axis-shifting optical anti-shake lens driving device for portable digital devices such as mobile phones with camera functions. Background technique [0002] For portable digital devices such as mobile phones with camera functions, the focus of the camera is different from that of ordinary cameras. The former cannot adjust the position of the photosensitive element due to miniaturization, so its focus function is essentially integrated in the ISP (Image Signal Processor) A set of image data acquisition and processing methods. When the raw image is captured by the viewfinder, the image data is sent to the ISP as raw data, and the ISP analyzes the raw data to check for density differences between adjacent pixels in the image. If the focus of the original image is inaccurate, then the adjacent pixel density will be very close, and at this time the ISP will have ...

AI Technical Summary

Problems solved by technology

However, in order to achieve autofocus for devices with this type of structure, all actuating devices must be driven during each shooting process regardless of whether anti-shake compensation is required, which obviously increases power consumption and has a great impact on the battery life of the device.

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