Altek Semiconductor Corp.

Global Mixed-mode Technology Inc.

Vasstek International Corporation

Ching-Lung Tsai

Hong-Long Chou

Ming-Jiun Liaw

Yu-Chih Wang

Simon Mong-Lun Law

Wei-Yu Chen

Chan-Min Chou

A motor controller used for driving a motor is provided. The motor includes a motor coil and a maximum rated current. The motor controller comprises a driving circuit, a control unit, a digital-to-analog converter, an operational amplifier, a switch circuit, and a resistor. When it is needed to decrease a settling time for the motor to reach a target position, or a vibration is detected within a camera module so as to enable an image stabilization mechanism, it is capable of temporarily supplying a driving current greater than the maximum rated current to the motor coil.

Motor controller

A method for calibrating image defection of an image capturing device having a first and second lens, a focusing actuator, and a prestored first focusing step-to-focusing distance relation includes the following steps. A plurality of image sets are captured by the first and second lens, where each of the image sets includes a first and second image, and the images sets include a reference image set. It is detected whether the reference image set is defective. When the reference image set is detected to be defective, the first focusing step-to-focusing distance relation is calibrated according to a focusing step and a focusing distance corresponding to each of the image sets, where the focusing step corresponding to each of the image sets is the number of steps that the focusing actuator is required to move the first and second lens to a focusing position to generate each of the image sets.

Image capturing device and method for calibrating image defection thereof

A method for calibrating image deformation of an image capturing device having a first and second lens, a focusing actuator, and a prestored first focusing step-to-focusing distance relation includes the following steps. A plurality of image sets are captured by the first and second lens, where each of the image sets includes a first and second image, and the images sets include a reference image set. It is detected whether the reference image set is deformed. When the reference image set is detected to be deformed, the first focusing step-to-focusing distance relation is calibrated according to a focusing step and a focusing distance corresponding to each of the image sets, where the focusing step corresponding to each of the image sets is the number of steps that the focusing actuator is required to move the first and second lens to a focusing position to generate each of the image sets.

Image capturing device and method for calibrating image deformation thereof

A voice coil motor (VCM) includes a lens carrier physically connected to a magnetic device, an electromagnetic driving apparatus, constructed by a coil, a magnetic sensing element, a storage media and a controller. The magnetic sensing element detects a location of the lens carrier and outputs the location value relating to the location of the lens carrier via an amplifier. The storage media stores a gain value and an offset compensation value relating to the amplifier. The controller can make the lens carrier move between a top position and a bottom position in which the lens carrier can be moved within the voice coil motor. The lens carrier is moved using the coil interaction with a magnetic field of the magnetic device when current is applied to the coil.

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Hsinchu, Taiwan

Ching-Lung Tsai