標題: Design and implementation of a voice-coil motor servo control IC for auto-focus mobile camera applications
作者: Hsu, Jhih-Da
Tsai, Ching-Lung
Tzou, Ying-Yu
電控工程研究所
Institute of Electrical and Control Engineering
公開日期: 2007
摘要: This paper presents the design methodology to implement a fully digital control IC for the position control of the auto-focus (AF) lens module in applications to mobile phone camera using the field programmable gate array (FPGA). As compared with the conventional stepping motor control with a spring return fixture, the AF lens module is driven by a voice-coil motor (VCM) with a digital servo drive IC. The proposed digital servo drive IC includes a digital servo controller, a digital current controller, and a full-bridge dc-dc converter. The designed digital servo drive IC provides a total digital solution to the position control of the AF lens module in applications to high-performance light-weight slim-type mobile phone camera and video. The designed AF lens module can reach a control range of 0.6 mm within 30 ms with a control resolution less than 5 mu m, a peak driving force of 30 mN, and a peak output current of 120 mA.
URI: http://hdl.handle.net/11536/11723
http://dx.doi.org/10.1109/PESC.2007.4342192
ISBN: 978-1-4244-0654-8
ISSN: 0275-9306
DOI: 10.1109/PESC.2007.4342192
期刊: 2007 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-6
起始頁: 1357
結束頁: 1362
Appears in Collections:Conferences Paper


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