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Method for controlling lens actuation for quick auto-focusing and apparatus for same

A technology of automatic focusing and vibration control, applied in focusing devices, focusing devices, focusing devices of cameras, etc., can solve the problem of inability to adjust the resonance frequency at will

Active Publication Date: 2018-01-26
ZINITIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Factors such as the weight of the lens and the displacement of the lens for shifting the focal distance need to be designed according to the purpose of use of the camera module. This design comes with certain restrictions, so the above-mentioned resonance frequency cannot be adjusted arbitrarily.

Method used

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  • Method for controlling lens actuation for quick auto-focusing and apparatus for same

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Embodiment Construction

[0034] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Also, the present invention is not limited to the embodiments described in this specification, but can be embodied in various forms. Terms used in this specification are used to help understanding of the embodiments, and are not used to limit the scope of the present invention. In addition, the singular form used below includes the plural form as long as the sentence does not show an opposite meaning.

[0035] figure 1 A structural diagram showing an autofocus drive control device and an autofocus camera module according to an embodiment of the present invention.

[0036]figure 1 Among them, the camera module 2 supporting autofocus may include an autofocus drive control device 1 (lens drive control device), an autofocus command part 10 (AF Command Part), a drive element 50 (lens drive element) (ex: VCM) and a lens 60.

[0037] The lens driving control device 1 (autofo...

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Abstract

The invention relates to a method for controlling lens actuation for quick auto-focusing and an apparatus for the same. Disclosed is a method for controlling lens AF actuation, the method in which anactuation current, being input to an actuation device for actuating a lens, is changed such that the position of the lens is changed from an initial position to a target position. In an actuation current control interval between a control start point at which a change in an actuation current starts and a control end point at which the change in the actuation current ends, in order that the actuation current maintains a plurality of current levels which exist between a target actuation current level corresponding to the target position and an initial actuation current level corresponding to theinitial position at least once, respectively, a step for increasing the actuation current and a step for decreasing the actuation current are comprised at least once, respectively.

Description

technical field [0001] The present invention relates to electronic control technology, in particular, to the technology of quickly moving the position of the lens to stabilize it. Background technique [0002] Various user equipments are integrated into one integrated user equipment (hereinafter simply referred to as user equipment), for example, a smart phone or a tablet computer. At this time, a camera module using a lens is also installed in most of the above-mentioned user equipments. Also, with the development of technology for processing images captured through a lens, the market for digital cameras has grown. [0003] A lens is attached to each of the above-mentioned devices, and an auto focus (AF, auto focus) technology that moves the focus by aligning the distance from the shooting surface to the subject can be applied to the lens. [0004] Autofocus technologies such as piezo elements or voice coil actuators (Voice Coil Modules) (VCMs), which are combined with th...

Claims

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Application Information

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IPC IPC(8): G03B13/36G02B7/09G03B3/10G02B7/28
CPCG02B7/09G02B7/28G03B3/10G03B13/36
Inventor 玄敬源金东元金柄录慎勍范朴孝禛
Owner ZINITIX