KR20200022057A - An apparatus for determining an optimum distance between a transmitting antenna and a receiving antenna in wireless charging system and a wireless charging system using the same - Google Patents

Abstract

The present invention relates to an apparatus for indicating an optimal distance between a transmitting antenna and a receiving antenna and a wireless charging system using the same. According to the present invention, the apparatus for indicating an optimal distance between a transmitting antenna and a receiving antenna, which shows optimal energy efficiency, in a wireless charging system comprising a wireless power transmitter which converts commercial power to generate a power single having a wireless power transmission frequency and transmits the power signal through the transmitting antenna, and a wireless power receiver which receives the power signal output from the wireless power transmitter through the receiving antenna and outputs the same at a constant voltage through a constant voltage unit, comprises: a first comparison unit comparing a first reference voltage corresponding to the optimal distance with an input signal of the constant voltage unit, which varies depending on a distance between the transmitting antenna of the wireless power transmitter and the receiving antenna of the wireless power receiver; a display unit indicating whether the transmitting antenna and the receiving antenna are installed to be spaced apart at a distance with high power efficiency; and a control unit displaying that the transmitting antenna and the receiving antenna are installed at the distance with high power efficiency using an output signal of the first comparison unit when the output signal of the first comparison unit is activated.

Description

An apparatus for determining an optimum distance between a transmitting antenna and a receiving antenna in wireless charging system and a wireless charging system using the same

The present invention relates to a wireless charging system, and more particularly, to an apparatus for displaying an optimal distance between a transmitting antenna and a receiving antenna of a wireless charging system indicating whether a transmitting antenna and a receiving antenna are installed at an optimum distance, and a wireless charging system using the same. It is about.

In general, a digital door lock uses a general direct current type battery to supply power. However, when a biometric information is added to a digital door lock to add a biometric information input device or an external device such as a wireless communication device, an image input and a transmission device, power consumption is high, and thus a power supply may not be sufficient for a DC type battery. . In order to solve this problem, it is necessary to supply power by applying a wireless power transmission technology, and use a charged power in an emergency by charging using a secondary battery.

The wireless power transmitter converts commercial power, generates a power signal having a wireless power transmission frequency, and wirelessly transmits power through a transmission antenna. The wireless power receiver receives power signals output from the wireless power transmitter through a receiving antenna to supply power to the digital door lock device or a device requiring power supply.

At this time, the wireless power supply and charging efficiency may vary depending on the distance between the wireless power transmitter and the wireless power receiver of the wireless charging system for wirelessly supplying and charging power. When receiving power transmitted through the wireless power transmitter through the wireless power receiver, it is necessary to install the wireless power transmitter and the wireless power receiver at a distance indicating the optimum efficiency. That is, if the optimum distance between the transmitting antenna of the wireless power transmitter and the receiving antenna of the wireless power receiver indicating the maximum power supply and charging efficiency is displayed, it will be very convenient when installing the wireless charging system.

Registered Patent Publication No. 10-1437975 (registered Aug. 29, 2014)

The problem to be solved by the present invention is to satisfy the above-mentioned necessity and convenience, when installing a wireless power transmitter and a wireless power receiver in a wireless charging system, wireless power is greatly supplied and wireless charging, to increase the charging efficiency The present invention provides an apparatus for displaying an optimum distance between a transmitting antenna and a receiving antenna of a system.

Another problem to be solved by the present invention is the optimal distance between the transmission antenna and the reception antenna of the wireless charging system, when the wireless power transmitter and the wireless power receiver in the wireless charging system is installed, the wireless power is greatly supplied and the charging efficiency is increased. It is to provide a wireless charging system using a display device.

In order to achieve the above technical problem, an apparatus for displaying an optimum distance between a transmission antenna and a reception antenna of a wireless charging system according to the present invention converts a commercial power source to generate a power signal having a wireless power transmission frequency, and transmits it through a transmission antenna. Transmitter; And a wireless power receiver for receiving a power signal output from the wireless power transmitter through a reception antenna and outputting the power signal at a constant voltage through a constant voltage unit. An apparatus for indicating an optimum distance, the apparatus comprising: comparing an input signal of the constant voltage unit that varies according to a distance between a first reference voltage corresponding to the optimum distance and a transmission antenna of the wireless power transmitter and a reception antenna of the wireless power receiver; First comparison unit; A display unit for displaying whether the transmission antenna and the reception antenna are separated by a distance having high power efficiency; And a controller configured to display the transmission antenna and the reception antenna at a high power efficiency distance by using the output signal of the first comparator when the output signal of the first comparator is activated.

An apparatus for displaying an optimum distance between a transmission antenna and a reception antenna of a wireless charging system according to the present invention includes a second comparison comparing a second reference voltage set to a voltage outside the range of the first reference voltage and an input signal of the constant voltage unit. The control unit may further include a display unit, and when the output signal of the second comparator is activated, the display unit indicates that the transmission antenna and the reception antenna are installed at a distance of low power efficiency using the output signal of the second comparator. It is done.

The second comparison unit may include a lower limit comparison unit configured to compare a lower limit reference voltage set to a voltage lower than a range of the first reference voltage and an input signal of the constant voltage unit; And an upper limit comparison unit configured to compare an upper limit reference voltage set to a voltage higher than a range of the first reference voltage, and an input signal of the constant voltage unit, wherein the control unit outputs the output signal of the lower limit comparison unit when the output signal of the lower limit comparison unit is activated. The transmission antenna and the reception antenna are installed at a distance of low power efficiency using the display unit. When the output signal of the upper limit comparator is activated, the transmission antenna and the reception antenna are output using the output signal of the upper limit comparator. Is installed at a distance of low power efficiency, and is displayed on the display unit.

Wireless charging system according to the present invention for achieving the above another technical problem, converts a commercial power source to generate a power signal having a wireless power transmission frequency and transmits through a transmission antenna; A wireless power receiver configured to receive a power signal output from the wireless power transmitter through a reception antenna and output the power signal at a constant voltage through a constant voltage unit; When the distance between the transmitting antenna and the receiving antenna showing the optimum energy efficiency is an optimum distance, the first reference voltage corresponding to the optimum distance, the reception antenna of the wireless power transmitter and the reception of the wireless power receiver A first comparing unit comparing the input signal of the constant voltage unit depending on the distance between the antennas; A display unit displayed to identify whether the transmitting antenna and the receiving antenna are installed at a distance of high power efficiency; And a controller configured to display the transmission antenna and the reception antenna at a high power efficiency distance by using the output signal of the first comparator when the output signal of the first comparator is activated.

The wireless power receiver includes a reception antenna for receiving a power signal wirelessly transmitted from the wireless power transmitter; A reception antenna matching unit for matching the reception antenna to efficiently receive a power signal transmitted wirelessly from the wireless power transmission apparatus; A full-wave rectifier for full-wave rectifying the output signal of the reception antenna matching unit; A constant voltage unit configured to output the full wave rectified signal at a constant voltage; A charging unit for charging energy using the constant voltage signal; A charging protection unit for preventing overcharge and overdischarge of the charging unit; And a power supply unit supplying power using the charged energy.

In the wireless charging system according to the present invention, the wireless power transmitter is installed in the door frame, the wireless power receiver is installed in the door paired with the door frame, when the door is closed by the output signal of the constant voltage to the power source It further includes a door lock device for receiving power from the power supply when the door is open or in case of power failure.

The wireless power transmitter includes an AC / DC converter for converting external power into direct current;

A first constant voltage circuit unit generating a first constant voltage from an output of the AC / DC converter; A second constant voltage circuit unit generating a second constant voltage from an output of the AC / DC converter; An oscillator for generating a wireless power transmission frequency signal using the second constant voltage as a power source; An amplifier for amplifying a transmission frequency signal generated by the oscillator using the first constant voltage as a power source; A transmission antenna matching unit matching the transmission antenna to efficiently transmit the amplified signal wirelessly; And a transmission antenna for outputting the matched signal as a wireless signal.

The wireless charging receiver according to the present invention includes a reception antenna for converting a commercial power source to generate a power signal having a wireless power transmission frequency to receive a power signal output from a wireless power transmission device for transmitting through a transmission antenna; A receiving antenna matching unit which matches the receiving antenna to efficiently receive a power signal transmitted from the transmitting antenna; A full-wave rectifier for full-wave rectifying the output signal of the reception antenna matching unit; A constant voltage unit configured to output the full wave rectified signal at a constant voltage; A charging unit for charging energy using the constant voltage signal; A charging protection unit for preventing overcharge and overdischarge of the charging unit; A power supply unit supplying power using the charged energy; When the distance between the transmitting antenna and the receiving antenna showing the optimum energy efficiency is an optimum distance, the first reference voltage corresponding to the optimum distance, the reception antenna of the wireless power transmitter and the reception of the wireless power receiver A first comparing unit comparing the input signal of the constant voltage unit depending on the distance between the antennas; A display unit for displaying whether the transmission antenna and the reception antenna are separated by a distance having high power efficiency; And a controller configured to display the transmission antenna and the reception antenna at a high power efficiency distance by using the output signal of the first comparator when the output signal of the first comparator is activated.

The wireless charging receiver further includes a door lock device that uses the output signal of the constant voltage as a power source when the door is closed, and receives power from the power supply unit when the door is open or in the case of power failure, and the wireless power transmitter Is installed in the door frame, the wireless power receiving device is characterized in that it is installed in the door paired with the door frame.

According to the apparatus and method for displaying an optimum distance between a transmitting antenna and a receiving antenna of the wireless charging system according to the present invention, when the wireless power transmitting device and the wireless power receiving device are installed in the wireless charging system, the input signal of the constant voltage unit of the wireless power receiving device is provided. By comparing with the reference voltage corresponding to the optimum distance between the transmitting antenna and the receiving antenna, it is possible to know whether the distance between the transmitting antenna and the receiving antenna of the wireless charging system is the optimum distance, and thus the user has high charging efficiency and the strength of the received power. Wireless charging transmitter and receiver can be installed easily and conveniently in a large location.

1 is a block diagram illustrating an example of a wireless power transmission apparatus to which an apparatus for displaying an optimum distance between a transmission antenna and a reception antenna of the wireless charging system according to the present invention is applied.
2 is a block diagram illustrating an example of a wireless power receiver to which an apparatus for displaying an optimum distance between a transmission antenna and a reception antenna of the wireless charging system according to the present invention is applied.
3 is a block diagram illustrating a configuration of an embodiment of an apparatus for displaying an optimum distance between a transmitting antenna and a receiving antenna and a wireless charging system including the same according to the present invention.
4 is a block diagram illustrating an example of a more specific configuration of the second comparison unit 320.
5 is a block diagram showing an example of the configuration of the door lock device that can be operated by the power supply of the charging system according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Configurations shown in the embodiments and drawings described herein are only one preferred embodiment of the present invention, and do not represent all of the technical spirit of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be variations and variations.

1 is a block diagram illustrating an example of a wireless power transmitter 100 to which an apparatus for displaying an optimum distance between a transmission antenna and a reception antenna of the wireless charging system according to the present invention is applied. The wireless power transmitter 100 includes an AC / DC converter 110, a first constant voltage unit 120, a second constant voltage unit 130, an oscillator 140, an amplifier 150, and a transmission antenna matching unit 160. And a transmission antenna 170.

The AC / DC converter 110 converts external power into direct current, and may be installed at a short distance from the wireless power receiver.

The first constant voltage unit 120 generates a first constant voltage from the output of the AC / DC converter 110. For example, the first constant voltage unit 120 may generate 12 V as the first constant voltage from the output of the AC / DC converter 110. The first constant voltage 12V is amplified by the amplifier 150.

The second constant voltage unit 130 generates a second constant voltage from the output of the AC / DC converter 110. For example, the second constant voltage unit 130 may generate 5 V as the second constant voltage from the output of the AC / DC converter 110.

The oscillator 140 generates a wireless power transmission frequency signal by using the second constant voltage of the second constant voltage unit 130 as a power source. For example, the oscillator 140 may generate a wireless power transmission frequency by oscillating 5V output from the second constant voltage unit 130.

The amplifier 150 amplifies the transmission frequency signal generated by the oscillator 140 using the first constant voltage of the first constant voltage unit 120 as a power source.

The transmission antenna matching unit 160 matches the transmission antenna 170 in order to efficiently transmit the signal amplified by the amplifier 150 wirelessly.

The transmission antenna 170 outputs a signal matched by the transmission antenna matching unit 160 as a wireless power signal. The transmitting antenna 170 may use an antenna having directivity in the direction of the receiving antenna, or may install a shield in the opposite direction as necessary.

2 is a block diagram illustrating an example of a wireless power receiver 200 to which an apparatus for displaying an optimum distance between a transmission antenna and a reception antenna of the wireless charging system according to the present invention is applied. The wireless power receiver 200 includes a receiving antenna 210, a receiving antenna matching unit 220, a full wave rectifying unit 230, a constant voltage unit 240, a charging protection unit 250, a charging unit 260, and a power source. The supply unit 270 may be further included.

The reception antenna 210 receives a power signal transmitted wirelessly from the wireless power transmitter 100. The receiving antenna matching unit 220 matches the receiving antenna 210 in order to efficiently receive the power signal transmitted wirelessly from the wireless power transmitter 100. The full wave rectifying unit 230 full-wave rectifies the output signal of the reception antenna matching unit 220, for example, a sinusoidal signal.

The constant voltage unit 240 stabilizes and outputs the signal rectified by the full wave rectifier 230 to a constant voltage. The charging unit 260 charges energy by using a stable signal at a constant voltage in the constant voltage unit 240, and may be used as a secondary battery. The charging protection unit 250 prevents overcharging and overdischarging of the charging unit 260. The power supply unit 270 may supply power to each system unit by using the energy charged in the charging unit 260, and may supply power to an external device as necessary.

3 is a block diagram showing the configuration of an embodiment of a wireless charging system including the optimum display device 300 and the transmission antenna and the receiving antenna of the wireless charging system according to the present invention.

One embodiment of the optimum distance display device 300 between the transmission antenna and the reception antenna of the wireless charging system according to the present invention includes a first comparison unit 310, the control unit 330 and the display unit 340, the second comparison The unit 320 may further include.

The first comparing unit 310 is a first reference voltage corresponding to the optimum distance between the transmission antenna 170 of the wireless power transmitter and the receiving antenna 210 of the wireless power receiver showing a high power efficiency in the wireless charging system, The input signal of the constant voltage unit 240 of the wireless power receiver varies according to the distance between the transmission antenna 170 of the wireless power transmitter and the reception antenna 210 of the wireless power receiver. For example, the first reference voltage may be set to + 3V.

The display unit 340 may output, as light, color, or sound, whether the distance between the transmission antenna 170 and the reception antenna 210 is separated by a distance having high power efficiency under the control of the controller 330. For example, if the distance between the transmitting antenna 170 and the receiving antenna 210 is installed by a suitable distance with a high power efficiency, the display unit 340 turns on the green LED, the transmitting antenna 170 and the receiving antenna 210 The display unit 340 may turn on the red LED when the distance between the lines deviates from the proper distance. As another example, the distance between the transmitting antenna 170 and the receiving antenna 210 is out of the proper distance, but the closer to the appropriate distance, the display unit 340 causes the red LED to blink, the blinking time interval may be reduced. have. As another example, as a sound, the proper distance may be announced. When installed at the proper distance, it makes a pleasant sound, and when it is out of the proper distance, it may sound a warning sound or increase the intensity of the sound.

When the output signal of the first comparator 310 is activated, the control unit 330 uses the output signal of the first comparator 310 to install the transmitting antenna 170 and the receiving antenna 210 at a high power efficiency. The display unit 340 displays the result. For example, when the first reference voltage is set to + 3V, when the input voltage of the constant voltage unit 240 reaches + 3V, the optimum distance may be displayed and the stable power may be displayed.

The second comparison unit 320 compares the second reference voltage set to a voltage outside the range of the first reference voltage and the input signal of the constant voltage unit 240. At this time, when the output signal of the second comparator 320 is activated, the controller 330 uses the output signal of the second comparator 320 to reduce the power efficiency of the transmission antenna 170 and the reception antenna 210. It is displayed on the display unit 340 to be installed in. 4 is a block diagram illustrating an example of a more specific configuration of the second comparison unit 320. Referring to FIG. 4, the second comparison unit 320 may include an upper limit comparison unit 322 and a lower limit comparison unit 324.

The upper limit comparison unit 322 compares the upper limit reference voltage set to a voltage higher than the range of the first reference voltage and the signal inputted to the constant voltage unit 240 by full-wave rectification by the full-wave rectifying unit 230. The lower limit comparison unit 324 compares the lower limit reference voltage set to a voltage lower than the range of the first reference voltage and the signal inputted to the constant voltage unit 240 by full-wave rectification by the full-wave rectifier 230. For example, if the reference voltage is 3V and the range of the reference voltage is 2.9V to 3.1V, the upper limit comparison unit 322 may set the upper limit reference voltage to a value of 3.1V or more and the lower limit reference voltage to 2.9V or less. have. In this case, when the input voltage of the constant voltage unit 240 is greater than or equal to 3.1 V, the upper limit comparison unit 322 operates, but the display unit 340 indicates that the control unit 330 may not be damaged and the optimum distance and efficiency are not high. ). In addition, when the input voltage of the constant voltage unit 240 is less than or equal to 2.9V, the lower limit comparison unit 324 displays on the display unit 340 that the distance between the transmitting antenna and the receiving antenna is not an optimal distance and that the efficiency is not high due to unstable power supply. do.

That is, when the output signal of the upper limit comparing unit 322 is activated, the control unit 330 uses the output signal of the upper limit comparing unit 322 to install the transmitting antenna 170 and the receiving antenna 210 at a low power efficiency distance. When the output signal of the lower limit comparator 324 is activated and the output signal of the lower limit comparator 324 is activated, the transmission antenna 170 and the reception antenna 210 have a low power efficiency distance. It is displayed on the display unit 340 to be installed in.

In the wireless charging system using the optimum distance display device 300 between the transmission antenna and the reception antenna of the wireless charging system according to the present invention, the wireless power transmitter 100, the wireless power receiver 200 and the first comparison unit 310 , The controller 330 and the display unit 340 may be included, and the second comparator 320 may be further included.

The wireless power transmitter 100 converts commercial power, generates a power signal having a wireless power transmission frequency, and transmits the power signal to the wireless power receiver 200 through the transmission antenna 170.

The wireless power receiver 200 receives the power signal output from the wireless power transmitter 100 through the reception antenna 210 and outputs the constant voltage through the constant voltage unit 240. The first comparison unit 310, the second comparison unit 320, the control unit 330, and the display unit 340 may be configured to provide an optimum distance display device 300 between a transmission antenna and a reception antenna of the wireless charging system according to the present invention. The description is the same as that of the component.

The wireless charging system using the optimum distance display device 300 between the transmission antenna and the reception antenna of the wireless charging system according to the present invention may further include a door lock device 350.

In order to supply power to the door lock device 350, the wireless power transmitter 100 is installed in the door frame of the door lock device is installed, the wireless power receiver 200 is preferably installed in the door paired with the door frame. Do. The door lock device 350 uses the output signal of the constant voltage unit 240 as a power source of the door lock device 350 when the door is closed, and receives power from the power supply unit 270 when the door is open or in the case of power failure. It is.

5 is a block diagram showing an example of the configuration of the door lock device 350, the door lock device 350 is a door lock control unit 510, a lock unit 520, a lock device control unit 530, memory 540 And a keypad 550, and may further include a biometric information input unit 560, a wireless communication unit 570, and an image input and output unit 580 as necessary.

When the password or biometric information is input from the keypad 550 or the biometric information input device 560, the door lock control unit 510 compares the information stored in the memory 540 to determine whether the lock unit 530 is released. To control. The lock unit 520 has a function of locking or opening to open and close the door. The lock control unit 530 controls the lock unit 520. The memory 440 stores biometric information or a password of a user. The keypad 550 receives a password from a user. The biometric information input unit 560 receives biometric information from a user. The wireless communication unit 570 performs a communication function with the outside. The image input and output unit 580 has an image input and output function.

In addition, the power supply unit 270 of the wireless charging system according to the present invention may supply the charged power to the charging unit 260 corresponding to the secondary battery to the external device (360, 370, 380).

When the wireless charging system according to the present invention supplies power to the door lock device 350, the operation of the door lock device 350 will be described.

First, the AC / DC converter 110 of the wireless power transmitter 100 receives an external power source such as AC 110 volts or 220 volts and converts it into direct current. Then, the first constant voltage unit 120 generates a first constant voltage from the output of the AC / DC converter 110, and the second constant voltage unit 130 receives the second constant voltage from the output of the AC / DC converter 110. Create and print Here, the second constant voltage is used as the supply voltage of the oscillator 140 generating the wireless power transmission frequency, and the first constant voltage uses a voltage higher than the second constant voltage. The first constant voltage is used as a driving voltage of the amplifier 150 that is an amplifier circuit that amplifies the wireless power transmission frequency. For example, the second constant voltage may be 5 V, and the first constant voltage may be selected and used to suit the amplifier 150 between 12 V and 30 V.

Thereafter, the wireless power transmission frequency generated by the oscillation unit 140 by the second constant voltage of the second constant voltage unit 130 is amplified by the amplifier 150 to pass through the transmission antenna matching unit 160 to the transmission antenna 170. Through the air. At this time, a shield is installed at the rear side of the directional antenna or the antenna so that as many signals are received as possible toward the receiving antenna.

The transmit antenna 170 preferably has directivity in the direction of the receive antenna 210, and a shield may be provided on the rear surface of the antenna as necessary.

Then, the receiving antenna 210 receives a power signal transmitted wirelessly from the wireless power transmitter 100. The radio power transmission signal received in the air is output in a sine wave form through the receiving antenna 210 and the receiving antenna matching unit 220, the voltage is increased by the capacitor 280 via the full-wave rectifying unit 230 of the bridge diode type It is stabilized.

Then, the constant voltage unit 240 stabilizes the signal output from the full wave rectifying unit 230 and supplies it to the power supply unit 270 and the charge protection unit 250.

After that, the charging protection unit 250 charges the secondary battery corresponding to the charging unit 260 with a stable power source of the constant voltage unit 240, and has a function of preventing overvoltage and overdischarge so that the secondary battery 260 can be stably It can be charged. In addition, the power supply unit 270 supplies the power of the constant voltage unit 240 to the respective parts of the system, and supplies power of the secondary battery 260 to the respective parts in the case of power failure. This process provides a stable power supply.

In such a state, the user may enter a password by operating the keypad 450 according to a method registered in advance in order to return from the outing and open the door, or by bringing the biometric information closer to the biometric information input device 560. You can also type Here, the biometric information may be applied to various methods such as fingerprint, iris, and facial recognition. In the case of a fingerprint, a finger is touched, and in the case of a face or an iris, a face or an eye is brought close to the biometric information input device 560.

Next, when the password or the biometric information is input from the keypad 550 or the biometric information input device 560, the door lock control unit 510 compares the information stored in the memory 540 with or without the release of the lock unit 520. Control whether or not. That is, when the comparison result is matched, the locking device 520 is released to allow the door to be opened, and when the matching is not matched, the locking device 520 is not released.

Thereafter, the lock control unit 530 controls to release the lock unit 520 under the control of the door lock control unit 510 and releases the lock so that the lock unit 520 can open and close the door.

In addition, since the secondary battery 260 is used in the embodiment of the present invention, there is no fear of battery discharge, and thus, various functions that consume power may be applied to the digital door lock system. In addition, a wireless communication unit 470 may be provided to perform a communication function with the outside, if necessary, and may perform a communication function with the outside under the control of the door lock controller 410. The apparatus may further include an image input and output unit 480 having an image input and output function to photograph a person outside the door and use it for facial recognition or to provide it to an insider.

In the embodiment of the present invention by applying the wireless power transmission technology to the digital door lock system can apply a biometric authentication technology according to the development of the technology can greatly increase the user's convenience. In addition, in the embodiment of the present invention, since the secondary battery is used in the digital door lock system, and the battery is charged and used with wireless power, there is no problem in that the battery is not replaced and the operation is impossible when the battery is discharged.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: wireless power transmitter 110: AC / DC converter
120: first constant voltage unit 130: second constant voltage unit
140: oscillation unit 150: amplification unit
160: transmission antenna matching unit 170: transmission antenna
180: commercial power plug 200: wireless power receiver
210: receiving antenna 220: receiving antenna matching unit
230: full-wave rectifier 240: constant voltage unit
250: charging protection unit 260: charging unit
270: power supply 280: condenser
300: optimum distance display device 310: first comparison unit
320: second comparison unit 330: control unit
350: door lock device 360: external device 1
370: external device 2 380: external device 3
322: upper limit comparison 324: lower limit comparison
400: second comparison unit 510: door lock control unit
520: lock device 530: lock device control
540: memory 550: keypad
560: biometric information input device 570: wireless communication unit
580: Image input and transmission unit

Claims (10)

A wireless power transmitter converting commercial power to generate a power signal having a wireless power transmission frequency and transmitting the same through a transmitting antenna; And a wireless power receiver for receiving a power signal output from the wireless power transmitter through a reception antenna and outputting the power signal at a constant voltage through a constant voltage unit. In the device showing the optimum distance,
A first comparing unit comparing a first reference voltage corresponding to the optimum distance with an input signal of the constant voltage unit that varies according to a distance between a transmitting antenna of the wireless power transmitter and a receiving antenna of the wireless power receiver;
A display unit for displaying whether the transmission antenna and the reception antenna are separated by a distance having high power efficiency; And
When the output signal of the first comparator of the first comparison unit is activated by using the output signal of the first comparator including a control unit for displaying on the display unit is installed at a distance of high power efficiency, wireless charging system of the Optimum distance display device between transmitting antenna and receiving antenna. The method of claim 1,
And a second comparing unit comparing a second reference voltage set to a voltage outside the range of the first reference voltage and an input signal of the constant voltage unit.
When the output signal of the second comparator is activated, the control unit displays the transmission antenna and the reception antenna as being installed at a low power efficiency distance by using the output signal of the second comparator, wireless charging. Optimal distance display device between the transmitting and receiving antennas of the system. The method of claim 2, wherein the second comparison unit
A lower limit comparison unit comparing a lower limit reference voltage set to a voltage lower than a range of the first reference voltage and an input signal of the constant voltage unit; And
An upper limit reference unit configured to compare an upper limit reference voltage set to a voltage higher than a range of the first reference voltage, and an input signal of the constant voltage unit;
The control unit
When the output signal of the lower limit comparator is activated, the transmission antenna and the reception antenna are installed at a low power efficiency distance by using the output signal of the lower limit comparator. An apparatus for displaying an optimum distance between a transmission antenna and a reception antenna of a wireless charging system, wherein the transmission antenna and the reception antenna are installed at a distance of low power efficiency by using an output signal of an upper limit comparison unit. A wireless power transmitter converting commercial power to generate a power signal having a wireless power transmission frequency and transmitting the same through a transmitting antenna;
A wireless power receiver configured to receive a power signal output from the wireless power transmitter through a reception antenna and output the power signal at a constant voltage through a constant voltage unit;
When the distance between the transmitting antenna and the receiving antenna showing the optimum energy efficiency is an optimum distance, the first reference voltage corresponding to the optimum distance, the reception antenna of the wireless power transmitter and the reception of the wireless power receiver A first comparing unit comparing the input signal of the constant voltage unit depending on the distance between the antennas;
A display unit displayed to identify whether the transmitting antenna and the receiving antenna are installed at a distance of high power efficiency; And
And a controller configured to display the transmission antenna and the reception antenna at a distance of high power efficiency by using the output signal of the first comparator when the output signal of the first comparator is activated. The method of claim 4, wherein
And a second comparing unit comparing a second reference voltage set to a voltage outside the range of the first reference voltage and an input signal of the constant voltage unit.
When the output signal of the second comparator is activated, the control unit displays the transmission antenna and the reception antenna as being installed at a low power efficiency distance by using the output signal of the second comparator, wireless charging. system. The apparatus of claim 4, wherein the wireless power receiver is
A reception antenna for receiving a power signal wirelessly transmitted from the wireless power transmitter;
A receiving antenna matching unit for matching the reception antennas to increase power signal reception efficiency wirelessly transmitted from the wireless power transmission apparatus;
A full-wave rectifier for full-wave rectifying the output signal of the reception antenna matching unit;
A constant voltage unit configured to output the full wave rectified signal at a constant voltage;
A charging unit for charging energy using the constant voltage signal;
A charging protection unit for preventing overcharge and overdischarge of the charging unit; And
Wireless charging system including a power supply for supplying power using the charged energy. The method of claim 4, wherein
The wireless power transmitter is installed in the door frame, the wireless power receiver is installed in the door paired with the door frame,
And a door lock device that uses the output signal of the constant voltage as a power source when the door is closed, and receives power from the power supply unit when the door is open or in the case of power failure. The apparatus of claim 4, wherein the wireless power transmitter is
An AC / DC converter for converting external power into direct current;
A first constant voltage circuit unit generating a first constant voltage from an output of the AC / DC converter;
A second constant voltage circuit unit generating a second constant voltage from an output of the AC / DC converter;
An oscillator for generating a wireless power transmission frequency signal using the second constant voltage as a power source;
An amplifier for amplifying a transmission frequency signal generated by the oscillator using the first constant voltage as a power source;
A transmission antenna matching unit matching the transmission antenna to efficiently transmit the amplified signal wirelessly; And
And a transmission antenna for outputting the matched signal as a wireless signal. A reception antenna for converting commercial power to generate a power signal having a wireless power transmission frequency and receiving a power signal output from a wireless power transmission device transmitting through a transmission antenna;
A reception antenna matching unit matching the reception antenna to increase power signal reception efficiency transmitted from the transmission antenna;
A full-wave rectifier for full-wave rectifying the output signal of the reception antenna matching unit;
A constant voltage unit configured to output the full wave rectified signal at a constant voltage;
A charging unit for charging energy using the constant voltage signal;
A charging protection unit for preventing overcharge and overdischarge of the charging unit;
A power supply unit supplying power using the charged energy;
When the distance between the transmitting antenna and the receiving antenna showing the optimum energy efficiency is an optimum distance, the first reference voltage corresponding to the optimum distance, the reception antenna of the wireless power transmitter and the reception of the wireless power receiver A first comparing unit comparing the input signal of the constant voltage unit depending on the distance between the antennas;
A display unit for displaying whether the transmission antenna and the reception antenna are separated by a distance having high power efficiency; And
And a controller configured to display the transmission antenna and the reception antenna at a distance of high power efficiency by using the output signal of the first comparator when the output signal of the first comparator is activated. . The method of claim 9,
When the door is closed, the output signal of the constant voltage is used as a power source, and when the door is open or the power failure further includes a door lock device for receiving power from the power supply,
The wireless power transmitter is installed on the door frame, the wireless power receiver is installed on the door paired with the door frame, wireless charging receiver.

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