Patent ID: 6051949
Filing Date: 2000-04-18
Classification: G02B,H04N

Abstract:
A stepping motor driving apparatus for a camera, comprising:at least two 1-2 phase excitation type stepping motors, each of said at least two 1-2 phase excitation motors driving one system selected from a focusing lens system, a diaphragm system, and a zooming lens system, and each of said at least two 1-2 phase excitation type stepping motors having a plurality of 1-phase excitation positions;a drive controller which drives said stepping motors to respective determined positions; anda timer interrupt controller that activates said drive controller to (i) alternate between driving each of said at least two stepping motors on a predetermined cycle, and to (ii) always stop driving each of said at least two stepping motors at one of said plurality of 1-phase excitation positions before driving a next one of said at least two stepping motors, said timer interrupt controller alternating between driving each of said at least two stepping motors until said respective determined positions are reached.