Lens Driving Device and Lens Driving Method Thereof
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United States of America Patent
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N/A
Issued Date -
May 9, 2013
app pub date -
Jan 20, 2012
filing date -
Nov 9, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A lens driving device and a lens driving method thereof The lens driving device comprises an image sensing element used to sense an image of an image pickup target; a focus lens group used to change a focus point of the image; a direct current motor used to drive and move the focus lens group; and a microcontroller electrically coupled to the image sensing element for receiving the image signal, and used to control the direct current motor to drive and move the focus lens group for changing the focus point of the image, such that a contrast ratio of the image signal will change. Also, the microcontroller calculates a contrast value according to the contrast ratio. A process of focusing is completed while the focus lens group is located at a position of a maximum contrast value corresponding to the image signal.
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