Compact camera modules with Lavet stepping-motors as actuators

Details Compact camera modules with Lavet stepping-motors as actuators Compact camera modules with Lavet stepping-motors as actuators

2006-09-26

2010-02-02

Perkey, W. B. (Department: 2862)

Photography

Having variable focal length of camera objective

Power zoom

C396S133000, C396S144000

Reexamination Certificate

active

07657167

ABSTRACT:
A horological motor of the Lavet motor concept is used to form an actuator to control movement of a lens system to reduce power consumption in digital camera units used in various electronic equipment, e.g. PDA's, mobile phones, digital still cameras and camcorders, and as a result increase battery life. The coils of the horological motor are driven with CMOS I/O signals eliminating the need for high current motor drivers and allowing the integration of all picture capture functions, including the light sensitive pixel array, into a single chip to form a system on chip implementation. A plurality of actuators is used to control a lens system comprising auto focus, zoom and shutter and iris functions. A gear transmission system is used to allow the motor of the actuator to move in micro step, which allows calibration of the motor against mechanical barriers.

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