TY - JOUR
T1 - Miniaturized auto-focusing VCM actuator with zero holding current
AU - Liu, Chien Sheng
AU - Lin, Psang Dain
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2009/6/8
Y1 - 2009/6/8
N2 - In keeping with consumers' preferences for electronic products of ever smaller size and enhanced functionality, it is necessary to reduce the profile of the auto-focusing actuators used in camera phones without sacrificing their performance. Accordingly, this study modifies the Voice Coil Motor (VCM) actuator proposed by the current group in a previous study (C. S. Liu and P. D. Lin, Opt. Express, 16, 2533-2540, 2008) to accomplish a miniaturized auto-focusing actuator for cell phone camera modules with minimal power consumption. The proposed device comprises a VCM, a closed-loop position control system, a magnetoconductive plate, and a lens support structure to drive the lens to the optimal focusing position. The experimental results show that the actuator has a zero holding current when maintaining the lens in the specified focusing position. Overall, it is shown that compared to existing VCM actuators, the proposed actuator has both a higher power efficiency and an improved positioning repeatability.
AB - In keeping with consumers' preferences for electronic products of ever smaller size and enhanced functionality, it is necessary to reduce the profile of the auto-focusing actuators used in camera phones without sacrificing their performance. Accordingly, this study modifies the Voice Coil Motor (VCM) actuator proposed by the current group in a previous study (C. S. Liu and P. D. Lin, Opt. Express, 16, 2533-2540, 2008) to accomplish a miniaturized auto-focusing actuator for cell phone camera modules with minimal power consumption. The proposed device comprises a VCM, a closed-loop position control system, a magnetoconductive plate, and a lens support structure to drive the lens to the optimal focusing position. The experimental results show that the actuator has a zero holding current when maintaining the lens in the specified focusing position. Overall, it is shown that compared to existing VCM actuators, the proposed actuator has both a higher power efficiency and an improved positioning repeatability.
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U2 - 10.1364/OE.17.009754
DO - 10.1364/OE.17.009754
M3 - Article
C2 - 19506625
AN - SCOPUS:66849084086
VL - 17
SP - 9754
EP - 9763
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 12
ER -