Samsung Electronics Co., Ltd.

Seoul National University

Dong-Sung Song

Dong-Hoon Jang

Jin-young Choi

Byung-kwon Kang

Pyo-Jae Kim

Jun-Mo Koo

Hyung-Jin Chang

Hyung-Jin Jang

Byung-Kwon Kang

Jun-Mo c/o Samsung Electronics Co Ltd Koo

A hand-shake correction apparatus and method for a camera module for typical use in a mobile device. A camera unit includes an angular velocity sensor for sensing an angular velocity of a hand-shake motion of a camera, a position detection sensor for detecting a current position of an image sensor, and an actuator for actuating the image sensor. An Optical Image Stabilizer (OIS) circuit unit controls the actuator using a multi-rate Proportional Integrate Derivative (PID) control scheme that performs control a plurality of times using a shorter control period compared with existing PID controls for a basic period, in which a reference value is updated according to a control reference value by which the image sensor optimally shifts to correct a hand-shake motion.

Hand-shake correction method and apparatus of camera module for use in mobile device

A PID controlling apparatus and method for providing a control value to a control object according to the difference between an output value of the control object and a target value are provided, in which an error calculator outputs an error value between the target value and the output value of the control object, a PID operator calculates a proportional value, an integral value, and a derivative value of the error value, calculates the control value using the proportional value, the integral value, and the derivative value, and outputs the control value to the control object, a first sampler samples the output value of the control object a plurality of times with respect to the target value and outputs a sampled output value, and a controller controls the PID operator to repeat a PID operation and output the control value according to a sampling period of the first sampler.

Apparatus and method for proportional-integral-derivative control

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Seoul, South Korea

Dong-Sung Song