Stepping motor control device
First Claim
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1. An image sensing apparatus comprising:
- (a) a stepping motor including a plurality of electric-to-magnetic converting means for driving said stepping motor;
(b) control means arranged to control the effective level of an electric input supplied to each of said electric-to-magnetic converting means in a stepwise manner including at least three steps;
(c) exposure control means arranged to be driven by said stepping motor; and
(d) light receiving means arranged to have the quantity of light incident thereon limited by said exposure control means.
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Abstract
A stepping motor control device is provided with a current control circuit by which the levels of currents of different driving power sources arranged to drive a stepping motor are virtually continuously changed, so that the motor can be controlled at intermediate phases thereof.
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Citations
24 Claims
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1. An image sensing apparatus comprising:
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(a) a stepping motor including a plurality of electric-to-magnetic converting means for driving said stepping motor; (b) control means arranged to control the effective level of an electric input supplied to each of said electric-to-magnetic converting means in a stepwise manner including at least three steps; (c) exposure control means arranged to be driven by said stepping motor; and (d) light receiving means arranged to have the quantity of light incident thereon limited by said exposure control means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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(a) displacement means; (b) electromagnetic means for causing a relative displacement of said displacement means; (d) control means arranged to variably control the effective level of said pulse signal in a stepwise manner including at least three steps; (e) image sensing means arranged to have the quantity of exposure light varied according to the displacement of said displacement means; and (f) selecting means for selecting the number of pictures to be taken by said sensing means. - View Dependent Claims (12, 13)
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14. An image pick-up device comprising:
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(a) means for limiting radiation from an object; (b) electromagnetic means for operating said limiting means; (c) means for selecting a number of a picture to be picked up by said image pick-up device; and (d) means for supplying a signal to said electromagnetic means, wherein an effective level of said signal is variable in accordnace with the number of said selecting means. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An apparatus comprising:
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(a) a stepping motor for moving a member; (b) means for detecting that said member reaches a prescribed position; (c) means for supplying a drive signal to said stepping motor; and (d) means for controlling said supplying means, which changes an effective level of the drive signal supplied from said supplying means by changing a duty of said drive signal in response to detection by said detecting means. - View Dependent Claims (21, 22, 23, 24)
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Specification