Image pickup device and focal plane shutter
View Patent ↗An image pickup device includes: an image pickup element; a board including an opening through which light entering the image pickup element passes; a shutter opening and closing the opening; an actuator driving the shutter, and including: a rotor; a stator; and first and second coils wound around the stator and not electrically connected to each other; and a drive circuit including plural terminal portions to which the first and second coils are individually connected.
1. An image pickup device comprising:
an image pickup element;
a board including an opening through which light entering the image pickup element passes;
a shutter opening and closing the opening;
an actuator driving the shutter, and including: a rotor; a stator; and first and second coils wound around the stator and electrically connected to each other in parallel; and
a drive circuit to which the first and second coils are connected,
wherein
the stator includes: a base portion; arm portions extending substantially in parallel with each other from respective ends of the base portion in substantially a same direction,
the first and second coils are wound around one of the arm portions, and
the drive circuit controls the first and second coils in response to an operation state of the shutter.
2. The image pickup device of claim 1 , wherein
the stator includes first and second magnetic pole portions sandwiching the rotor and facing the rotor, and
energization of the first and second coils causes the first and second magnetic pole portions to have different polarity from each other.
3. The image pickup device of claim 1 , comprising a control portion causing an electronic leading shutter to move in a simulated manner by sequentially resetting stored charges in the image pickup element for every pixel line in a predetermined direction,
wherein the shutter is a trailing shutter.
4. The image pickup device of claim 1 , wherein
the shutter is one of a leading shutter and a trailing shutter,
the other of the leading shutter and the trailing shutter is maintained at a predetermined position by an electromagnet and is moved by biasing force of a spring.
5. The image pickup device of claim 1 , wherein
the shutter is one of a leading shutter and a trailing shutter,
the other of the leading shutter and the trailing shutter is driven by another actuator different from the actuator.
6. A focal plane shutter comprising:
a board including an opening;
a shutter opening and closing the opening; and
an actuator driving the shutter, and including:
a rotor;
a stator; and
first and second coils wound around the stator and electrically connected to each other in parallel,
wherein one ends of the first and second coils wound around the stator are electrically connected to each other, and
wherein other ends of the first and second coils wound around the stator are electrically connected to each other.
7. An image pickup device, comprising:
an image pickup element;
a board including an opening through which light entering the image pickup element passes;
a shutter opening and closing the opening;
an actuator driving the shutter, and including:
a rotor;
a stator having arm portions; and
first and second coils wound around the stator and electrically connected to each other in parallel; and
a drive circuit to which the first and second coils are connected,
wherein the first and second coils are wound around one of the arm portions,
wherein one ends of the first and second coils wound around the arm of the stator are electrically connected to each other, and
wherein other ends of the first and second coils wound around the arm of the stator are electrically connected to each other.