Wireless power transmission apparatus and method of transmitting wireless power using the same
First Claim
1. A wireless power transmission apparatus, comprising:
- a switching block having a plurality of switches, receiving distributed power signals, and delivering the power signals as periodical preamble signals that make a detour around a power amplification and transmission block or delivering the power signals to the power amplification and transmission block in accordance with switching under control;
the power amplification and transmission block amplifying the power signals received through the switching block on respective paths and transmitting the amplified power signals to a coil array block;
a sensing block detecting the preamble signals on the respective paths that make a detour around the power amplification and transmission block and are delivered to the coil array block, and sensing changes in the preamble signals according to whether wireless power receiving apparatuses receiving a wireless power from the coil array block appear; and
a power distribution and control block controlling the preamble signals to be periodically transmitted to the respective paths through the switching block, and controlling the switching block, on the paths where the wireless power receiving apparatuses appear, according to sensing results received from the sensing block to transmit the power signals to the power amplification and transmission block.
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Accused Products
Abstract
Provided are an apparatus and a method for transmitting wireless power. According to an embodiment of the present invention, a wireless power transmission apparatus includes: a switching block receiving distributed power signals and delivering the power signals as periodical preamble signals that make a detour around a power amplification and transmission block or delivering the power signals to the power amplification and transmission block; the power amplification and transmission block amplifying the power signals and transmitting the power signals to a coil array block; a sensing block detecting the preamble signals on the respective paths that are delivered to the coil array block, and sensing changes in the preamble signals according to whether wireless power receiving apparatuses appear; and a power distribution and control block controlling the switching block according to sensing results to transmit the power signals to the power amplification and transmission block.
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Citations
18 Claims
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1. A wireless power transmission apparatus, comprising:
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a switching block having a plurality of switches, receiving distributed power signals, and delivering the power signals as periodical preamble signals that make a detour around a power amplification and transmission block or delivering the power signals to the power amplification and transmission block in accordance with switching under control; the power amplification and transmission block amplifying the power signals received through the switching block on respective paths and transmitting the amplified power signals to a coil array block; a sensing block detecting the preamble signals on the respective paths that make a detour around the power amplification and transmission block and are delivered to the coil array block, and sensing changes in the preamble signals according to whether wireless power receiving apparatuses receiving a wireless power from the coil array block appear; and a power distribution and control block controlling the preamble signals to be periodically transmitted to the respective paths through the switching block, and controlling the switching block, on the paths where the wireless power receiving apparatuses appear, according to sensing results received from the sensing block to transmit the power signals to the power amplification and transmission block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of transmitting wireless power, comprising:
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(a) inputting, under control, distributed power signals to a switching block having a plurality of switches, and transmitting the power signals as periodical preamble signals on detour paths that make a detour around power amplification paths; (b) detecting the preamble signals that are delivered to a coil array block having transmission coils for wireless power transmission through the detour paths, and sensing changes in preamble signals in accordance with whether wireless power receiving apparatuses receiving the wireless power from the coil array block appear; (c) controlling the switching block on the paths where wireless power receiving apparatuses appear, in accordance with the changes in sensed preamble signals, transmitting the power signals input to the switching block to the power amplification paths, amplifying the power signals on the power amplification paths, and transmitting the amplified power signals to the coil array block; and (d) performing, by the coil array block, wireless power transmission. - View Dependent Claims (12, 13, 14, 15, 16)
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17. The method of 15, wherein (c1) includes:
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with respect to the paths switched to the wireless power transmission mode, (c1-a) inputting the distributed power signals to the switching block having the switches and transmitting the power signals to the power amplification paths in accordance with switching to the wireless power transmission mode; (c1-b) detecting the power signals delivered to the coil array block having the transmission coils through the power amplification paths, and sensing the changes in power signals in accordance with the reception state of the wireless power receiving apparatuses receiving the wireless power from the coil array block on the corresponding paths; and (c1-c) determining the charge progress state of the wireless power receiving apparatuses on the corresponding paths in accordance with the changes in sensed power signals, and switching to the sleep mode by turning off the switches for power input of the switching block on the corresponding paths and the bias power source for power amplification on the power amplification paths at the time of charge completion. - View Dependent Claims (18)
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Specification