Battery charger cradle
First Claim
1. A battery charger cradle for use with a battery built-in device having an induction coil and a battery rechargeable with power induced by the induction coil, the battery charger cradle comprising:
- a plate on which the battery built-in device is to be placed;
a primary coil for inducing electromotive force to the induction coil;
a movement mechanism for moving the primary coil; and
a position detection controller for detecting a position of the induction coil and controlling the movement mechanism to bring the primary coil closer to the induction coil,the position detection controller including;
a plurality of position detection coils arrayed in two directions along a surface of the plate;
a receiver circuit, connected to the position detection coils, for receiving a signal detected by the position detection coils; and
a discrimination decision circuit for determining a level of the signal received by the receiver circuit and judging the position of the induction coil on the basis of the level of the signal.
2 Assignments
0 Petitions
Accused Products
Abstract
In a battery charger cradle, a battery incorporated in a battery built-in device is charged by electric power induced to an induction coil. The cradle includes a primary coil for inducing electromotive force to the induction coil, a casing having a top plate atop of which the battery built-in device is placed, a movement mechanism for moving the primary coil along an inner surface of the top plate, and a position detection controller for detecting a position of the battery built-in device placed on the top plate and controlling the movement mechanism to bring the primary coil closer to the induction coil in the battery built-in device. When the battery built-in device is placed on the top plate, the position detection controller detects the position of the battery built-in device, and the movement mechanism moves the primary coil closer to the induction coil in the battery built-in device.
16 Citations
13 Claims
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1. A battery charger cradle for use with a battery built-in device having an induction coil and a battery rechargeable with power induced by the induction coil, the battery charger cradle comprising:
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a plate on which the battery built-in device is to be placed; a primary coil for inducing electromotive force to the induction coil; a movement mechanism for moving the primary coil; and a position detection controller for detecting a position of the induction coil and controlling the movement mechanism to bring the primary coil closer to the induction coil, the position detection controller including; a plurality of position detection coils arrayed in two directions along a surface of the plate; a receiver circuit, connected to the position detection coils, for receiving a signal detected by the position detection coils; and a discrimination decision circuit for determining a level of the signal received by the receiver circuit and judging the position of the induction coil on the basis of the level of the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification