POWER TRANSMITTING DEVICE
First Claim
1. A power transmitting device on which a power receiving device can be placed, the power receiving device charging a built-in battery by using wirelessly received power, the power transmitting device comprising:
- a power supply unit comprising a power input terminal and configured to generate a transmission power by using power supplied to the power input terminal;
a power transmitting coil configured to wirelessly transmit the transmission power to the power receiving device;
a first switch, once the first switch being turned on by receiving a switch-on control, the first switch electrically connecting an external power supply and the power input terminal until the first switch being turned off next time by receiving a switch-off control, and once the first switch being turned off by receiving the switch-off control, the first switch electrically disconnecting the external power supply and the power input terminal until the first switch being turned on next time by receiving the switch-on control;
a piezoelectric element disposed at a position at which a weight of the placed power receiving device can be detected, and the piezoelectric element configured to generate a detection power according to the weight of the placed power receiving device; and
a first switch controller configured to generate a starting power by the detection power and switch the first switch to on by using the starting power.
1 Assignment
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Accused Products
Abstract
According to an embodiment, a power transmitting device includes a power supply unit, a power transmitting coil, a first switch, a piezoelectric element, and a first switch controller. The power supply unit is configured to generate a transmission power by using power supplied to a power input terminal. Once the first switch is turned on, the first switch electrically connects an external power supply and the power input terminal until the first switch is turned off next time. The piezoelectric element is disposed at a position at which a weight of a placed power receiving device can be detected. The piezoelectric element is configured to generate a detection power according to the weight of the placed power receiving device. The first switch controller is configured to generate a starting power by the detection power and switches the first switch to on by using the starting power.
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Citations
17 Claims
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1. A power transmitting device on which a power receiving device can be placed, the power receiving device charging a built-in battery by using wirelessly received power, the power transmitting device comprising:
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a power supply unit comprising a power input terminal and configured to generate a transmission power by using power supplied to the power input terminal; a power transmitting coil configured to wirelessly transmit the transmission power to the power receiving device; a first switch, once the first switch being turned on by receiving a switch-on control, the first switch electrically connecting an external power supply and the power input terminal until the first switch being turned off next time by receiving a switch-off control, and once the first switch being turned off by receiving the switch-off control, the first switch electrically disconnecting the external power supply and the power input terminal until the first switch being turned on next time by receiving the switch-on control; a piezoelectric element disposed at a position at which a weight of the placed power receiving device can be detected, and the piezoelectric element configured to generate a detection power according to the weight of the placed power receiving device; and a first switch controller configured to generate a starting power by the detection power and switch the first switch to on by using the starting power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification