KR20160094261A - Wireless Power Transmitter and Wireless Power Receiver - Google Patents

Abstract

According to an embodiment of the present invention, disclosed are a wireless power transmitter and a wireless power receiver. According to an embodiment of the present invention, the wireless power transmitter comprises: a control unit for outputting a control signal in response to received light; and a power transmission unit for wirelessly supplying power to the wireless power receiver in response to the control signal.

Description

Technical Field [0001] The present invention relates to a wireless power transmission apparatus and a wireless power receiving apparatus,

The present invention relates to a wireless power transmission apparatus and a wireless power receiving apparatus.

Wireless power transmission technology is being applied not only to various home appliances such as smart phones but also to small devices such as hearing aids.

In wirelessly transmitting power from the wireless power transmission apparatus to the wireless power reception apparatus, the wireless power transmission apparatus receives information on the state of the wireless power reception apparatus, for example, the charging state of the rechargeable battery of the wireless power reception apparatus, Accordingly, it is necessary to adjust the size and the like of the wireless power to be transmitted. To this end, each of the wireless power receiving apparatus and the wireless power transmitting apparatus may be provided with communication means for transmitting the above-described information.

However, when the wireless power receiving apparatus is small in size such as a hearing aid, it is very difficult to add the conventional communication means to the wireless power receiving apparatus.

Korean Patent Laid-Open Publication No. 2013-0023618

According to an embodiment of the present invention, there is provided a wireless power transmission apparatus capable of receiving information on the state of a wireless power receiving apparatus transmitted using light from a wireless power receiving apparatus.

According to an embodiment of the present invention, there is provided a wireless power receiving apparatus capable of transmitting information on a current state to a wireless power transmission apparatus using light.

A wireless power transmission apparatus according to an embodiment of the present invention includes a control unit for outputting a control signal in response to received light, and a power transmitting unit for wirelessly supplying power to the wireless power receiving apparatus in response to the control signal.

A wireless power receiving apparatus according to an exemplary embodiment of the present invention includes a wireless power receiving unit for receiving wirelessly transmitted power and outputting a charged power to a rechargeable battery and a display unit for displaying information on the charged state of the rechargeable battery using light, .

Therefore, according to the embodiment of the present invention, information on the state of the wireless power receiving apparatus, for example, the charging degree of the rechargeable battery can be easily grasped on the wireless power transmission apparatus side through a simple configuration, And can be applied to a small wireless power receiving apparatus.

FIG. 1 is a diagram schematically illustrating an application example of a wireless power transmission apparatus according to an embodiment of the present invention. Referring to FIG.
2 is a schematic diagram of an apparatus including a wireless power receiving apparatus according to an exemplary embodiment of the present invention.
FIG. 3 is a diagram schematically illustrating an embodiment of an optical device of a wireless power transmission apparatus according to an embodiment of the present invention shown in FIG. 1. Referring to FIG.
FIGS. 4 and 5 are diagrams for explaining characteristics of an embodiment of the optical device shown in FIG.
6 is a block diagram schematically illustrating a wireless power transmission system including a wireless power transmission apparatus and a wireless power reception apparatus according to an embodiment of the present invention.
7 is a block diagram schematically illustrating a wireless power transmission apparatus according to an embodiment of the present invention.
FIG. 8 is a diagram schematically showing the configuration of an embodiment of the sensing unit of the controller of the wireless power transmission apparatus according to the embodiment of the present invention shown in FIG. 7;
9 is a diagram schematically showing a configuration of an embodiment of a power transmitter of a wireless power transmission apparatus according to an embodiment of the present invention shown in FIG.
10 is a schematic diagram of a wireless power transmission system including a wireless power transmission apparatus and a wireless power reception apparatus according to an embodiment of the present invention.
11 is a flowchart illustrating an operation of a wireless power transmission method according to an embodiment of the present invention.
12 is a diagram schematically illustrating an application example of a wireless power transmission apparatus according to an embodiment of the present invention.
FIG. 13 is a diagram schematically illustrating an embodiment of a sensing unit of a control unit that can be used in an application example of a wireless power transmission apparatus according to an embodiment of the present invention shown in FIG. 12;
14 is a diagram schematically illustrating an embodiment of a wireless power receiving apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

FIG. 1 is a diagram schematically illustrating an application example of a wireless power transmission apparatus according to an embodiment of the present invention. Referring to FIG. In FIG. 1, reference numerals 100-1, 100-2, 100-3, and 100-4 denote optical elements, and reference numeral 110 denotes an open / close detecting section.

The case 1 has an inner space in which a wireless power receiving apparatus can be disposed. When the case 1 is closed, the inflow of light from the outside into the internal space can be blocked. The case 1 has a portable size.

The optical elements 100-1, 100-2, 100-3, and 100-4 vary in electrical characteristics according to the intensity of the incident light, and can be disposed inside the case 1. Although FIG. 1 shows a case where four optical elements are arranged, the number of optical elements and the arrangement position of optical elements can be variously changed.

The opening / closing detector 110 may be implemented in a form similar to a switch. That is, when the case 1 is closed, the two terminals of the opening / closing detector 110 are shortened, and when the case 1 is opened, the two terminals of the opening / closing detector 110 can be opened have.

Although not shown in FIG. 1, the opening / closing detector 110 may be implemented by various sensors that sense whether the case 1 is open or closed and output a sensing signal. For example, the sensor may output a sensing signal according to the states of the two terminals 110 of FIG. Alternatively, the case 1 may further include a locking device for fixing the closed state. In this case, the sensor may output the sensing signal according to the state of the locking device.

Although not shown in FIG. 1, the case 100 may further include a control unit for outputting a control signal in response to light, and a power transmission unit for wirelessly transmitting power in response to the control signal. In this case, the control unit may output the control signal according to the electrical characteristics of the optical elements 100-1, 100-2, 100-3, and 100-4.

1, the wireless power transmission apparatus according to an exemplary embodiment of the present invention can be implemented using various devices whose characteristics vary according to incident light.

FIG. 2 is a schematic view of an apparatus including a wireless power receiving apparatus according to an embodiment of the present invention, in which the wireless power receiving apparatus of the present invention is applied to a compact hearing aid.

The apparatus including the wireless power receiving apparatus according to an embodiment of the present invention includes a display unit 200 that displays information on the state of the rechargeable battery using a rechargeable battery (not shown) and light. The information on the state of the rechargeable battery includes information on whether the rechargeable battery is being charged and / or information on the degree of charging of the rechargeable battery. The display unit 200 may be embodied as a diaphragm diode or the like.

Charging of a rechargeable battery (not shown) of the device shown in Fig. 2 can be performed inside a case equipped with a wireless power transmitting device similar to that shown in Fig. When the case is closed, light entering the case from the outside may be cut off.

According to the embodiment of the present invention, the wireless power transmission apparatus can control the magnitude of the wireless power and / or the wireless transmission of the power according to the charging degree of the rechargeable battery of the wireless power receiving apparatus. In particular, when wireless charging for a small device such as that shown in FIG. 2 proceeds in the inner space of the case shown in FIG. 1, it is possible to more accurately control the size and / or power of wireless power.

FIG. 3 is a diagram schematically illustrating an embodiment of an optical device of a wireless power transmission apparatus according to an embodiment of the present invention shown in FIG. 1. Referring to FIG.

An optical device of a wireless power transmission apparatus according to an embodiment of the present invention may be a light detecting resistor (LDR). The optical device 100 may be implemented in the form of a substrate having various patterns on its surface.

Each of the optical elements 100-1, 100-2, 100-3, and 100-4 in FIG. 1 may have the same configuration as the optical element 100 shown in FIG.

However, the optical elements 100-1, 100-2, 100-3, and 100-4 in Fig. 1 are not limited to the optical elements in Fig. As described above, the optical devices 100-1, 100-2, 100-3, and 100-4 of FIG. 1 can be implemented using various devices whose characteristics vary according to incident light. For example, each of the optical elements 100-1, 100-2, 100-3, and 100-4 of FIG. 1 may be implemented using photoelectric elements that vary the output voltage according to the amount of incident light.

FIGS. 4 and 5 are diagrams for explaining the characteristics of one embodiment of the optical device shown in FIG. 3, wherein FIG. 4 shows the correlation between the incident light quantity and the resistance of the optical device, The relationship between the resistances is shown on a logarithmic scale.

As described above, the optical device may be a photo-resistor. In this case, as shown in FIG. 4 and FIG. 5, the resistance value becomes large when the light amount of the incident light is small, and the resistance value becomes small when the light amount of the incident light becomes large.

6 is a block diagram schematically illustrating a wireless power transmission system including a wireless power transmission apparatus 10 and a wireless power reception apparatus 20 according to an embodiment of the present invention.

The wireless power transmission apparatus 10 wirelessly supplies power to the wireless power receiving apparatus 20. [ At this time, the magnitude or power supply of the power supplied from the wireless power transmission apparatus 10 is controlled in accordance with the light generated in the wireless power reception apparatus 20.

The wireless power receiving apparatus 20 receives power from the wireless power transmitting apparatus 10 wirelessly. The wireless power transmission apparatus 10 includes a rechargeable battery (not shown) and can charge the rechargeable battery (not shown) using the power supplied from the wireless power transmission apparatus 10. Further, the wireless power transmission apparatus 10 displays information on the state of the rechargeable battery using light. The information on the state of the rechargeable battery may include information on whether the rechargeable battery is being recharged and / or the amount of rechargeable battery.

7 is a block diagram schematically illustrating a wireless power transmission apparatus according to an embodiment of the present invention. The wireless power transmission apparatus 10 according to an embodiment of the present invention includes a power transmission unit 13, a control unit 14, And a power supply unit 15. The control unit 14 may include a sensing unit 11 and a control signal generating unit 12. [ The power transmitting apparatus 10 may further include a sensing unit 16. [

The power transmitting unit 13 wirelessly transmits power in response to the first control signal con1. The power transmission unit 13 can transmit power wirelessly by applying AC power to a transmission coil (not shown) using the power supply Vs supplied from the power supply unit 15. [ At this time, the magnitude of the AC power applied to the transmission coil (not shown) and / or the AC power supply to the transmission coil (not shown) may be determined according to the first control signal con1.

The controller 14 outputs the first control signal con1 according to the incident light. As described above, the wireless power receiving apparatus that receives power wirelessly can provide information on the rechargeable battery using light. That is, the control unit 14 can output the first control signal con1 according to the light output from the wireless power receiving apparatus.

The sensing unit 11 outputs a sensing signal Vdet according to incident light. The sensing unit 11 outputs the sensing signal Vdet having the first state when the light amount of the incident light is equal to or greater than the reference value and outputs the sensing signal Vdet having the second state when the light amount of the incident light is less than the reference value can do. Alternatively, the sensing unit 11 may vary the voltage of the sensing signal Vdet according to the amount of the incident light. Alternatively, the sensing unit 11 may vary the state or voltage of the sensing signal Vdet depending on the number of light to be incident or the position at which the light is generated.

The control signal generator 12 outputs the first control signal con1 in response to the detection signal Vdet. For example, the control signal generating unit 12 adjusts the pulse width of the first control signal con1, adjusts the frequency, or outputs the first control signal con1 in response to the detection signal Vdet Pulse signal type or a low level signal. Specifically, the control signal generator 12 may include a microprocessor and may vary the first control signal con1 according to the sensing signal Vout. Alternatively, the control signal generating unit 12 includes an oscillator for generating a pulse signal and a gate circuit for outputting the pulse signal or the low level signal as the first control signal con1 in response to the detection signal Vdet You may.

The power supply unit 15 supplies the power supply Vs to the power transmission unit 13 and / or the control unit 14.

As described in FIG. 1, the wireless power transmission apparatus of the present invention can be applied to a case in which a wireless power receiving apparatus is shielded from light received from the outside when the wireless power receiving apparatus is received and closed. In this case, as shown in FIG. 1, the case (1 of FIG. 1) may include an opening / closing sensing unit (110 of FIG. 1), and the control unit 14 may control the opening / 1, the operation of the power transmitting section 13 can be controlled depending on whether the case (1 in Fig. 1) is opened or closed.

To this end, the wireless power transmission apparatus 10 of the present invention may further include a sensing unit 16. The sensing unit 16 may sense the states of the two terminals of the open / close sensing unit 110 of FIG. 1 and output a sensing signal sen. In this case, the control signal generator 12 may output the first control signal con1 in response to the sensing signal sen. For example, when a sensing signal sen indicating that the case (1 in Fig. 1) is open is inputted, the control signal generating section 12 keeps the first control signal con1 at the high level state, Level state, power transmission can be prevented from being performed. 1, the case (1 in FIG. 1) may further include a locking device for maintaining the closed state. In this case, the sensing part 16 senses the state of the locking device, sen).

Although not shown, the power source unit 15 may be configured such that the power source Vs is supplied or cut off by the opening / closing detection unit 110 of FIG. Alternatively, the control unit 14 may directly detect the state of the open / close sensing unit 110 of FIG. 1 and output the first control signal con1 according to the result. In this case, the sensing unit 16 may be omitted.

8 is a diagram schematically showing the configuration of the embodiment of the sensing unit 11 of the control unit 14 of the wireless power transmission apparatus 10 according to the embodiment of the present invention shown in Fig. And may include a first voltage generator 1110, a second voltage generator 1120, and a comparator 1130. The first voltage generator 1110 may include a first resistor R1 and a second resistor R2 connected in series between a terminal to which the power source Vs is input and the ground. The second voltage generator 1120 may include a third resistor R3 and an optical element 100 connected in series between a terminal to which the power source Vs is input and the ground. The comparator 1130 may include a comparator CMP and an output resistor Rout connected between the output node of the comparator CMP and ground. The sensing unit 11 may further include a first capacitor C1 connected between a terminal to which the power supply voltage Vs is input and a ground.

The first voltage generating unit 1110 receives the power supply Vs and outputs a first voltage. The first voltage has a magnitude independent of the amount of incident light. Specifically, the first resistor R1 and the second resistor R2 operate as a voltage divider and divide the voltage of the power source Vs to output the first voltage. The first voltage may be input to the first terminal (e.g., the + terminal) of the comparator (CMP).

The second voltage generator 1120 receives the power supply Vs and outputs a second voltage that varies depending on the amount of light incident thereon. Specifically, the third resistor R3 and the optical element 100 also operate as a voltage divider, and the magnitude of the second voltage varies depending on the resistance value of the optical element 100. [ The second voltage may be input to a second terminal (e.g., - terminal) of the comparator (CMP).

The comparator 1130 compares the first voltage with the second voltage and outputs a sensing signal Vdet.

When the light amount of the light incident on the optical element 100 is smaller than the reference value, the resistance value of the optical element 100 is large, so that the second voltage has a larger value than the first voltage. Therefore, the comparator 1130 outputs the low-level sensing signal Vout.

When the light amount of the light incident on the optical element 100 is larger than the reference value, the resistance value of the optical element 100 is small, so that the second voltage has a smaller value than the first voltage. Therefore, the comparator 1130 outputs the high-level sensing signal Vout.

The resistance value of the third resistor R3 can be adjusted. That is, the third resistor R3 may be a variable resistor. In this case, the reference value can be adjusted by adjusting the resistance value of the third resistor R3. For this, the sensing unit 11 may receive the first adjustment signal u1.

In FIG. 8, a sensing signal Vdet indicating whether the amount of light incident on the optical device is greater than or less than a reference value is output using a comparator. However, the second voltage may be directly output as the sensing signal Vdet You may. In this case, the voltage level of the sensing signal Vdet may be a value that decreases as the amount of light incident on the optical device increases.

The sensing unit 11 includes an amplifier for amplifying the second voltage or a difference between the first voltage and the second voltage instead of the comparator CMP and outputs a sensing signal Vdet having a magnitude varying according to the amount of light It is possible.

As described above, a photoelectric device may be used as an optical device. In this case, the third resistor R3 may be omitted.

9 schematically shows the configuration of the embodiment of the power transmission unit 13 of the wireless power transmission apparatus 10 according to the embodiment of the present invention shown in Fig. 7. The power transmission unit 13 includes a power supply Vs A first switch element G1 connected between the first coil L1 and the ground and being turned on and off in response to the first control signal con1, A second capacitor C2 connected in parallel to the switch element G1, a third capacitor C3 connected between the first coil L1 and the ground, a second coil L2, a fourth capacitor C4, A transmission coil L3, and a fifth capacitor C5 connected in parallel with the transmission coil L3.

The wireless power transmission unit 13 can transmit power wirelessly by inputting the power supply Vs and applying AC power to the power transmission coil L3. The AC power applied to the power transmission coil L3 is controlled by the first control signal con1.

The first coil L1, the first switching device G1 and the second capacitor C2 can operate as a boost converter. That is, the first coil L1, the first switching device G1, and the second capacitor C2 can step up the voltage of the power source Vs in response to the first control signal con1. The magnitude of the voltage output by the first coil L1, the first switching device G1 and the second capacitor C2 can be determined according to the duty ratio of the first control signal con1. The magnitude of the AC power applied to the power transmission coil L3 is determined according to the magnitude of the voltage output by the first coil L1, the first switching device G1 and the second capacitor C2, The magnitude of the power that is wirelessly transmitted is determined according to the magnitude of the AC power applied to the power line L3.

The wireless power transmission unit 13 may be configured in various ways other than that shown in FIG.

In Fig. 9, the capacitor C3, the inductor L2, the capacitor C4, and the capacitor C5 can perform an impedance matching function. Alternatively, the capacitor C4 and / or the capacitor C5 may form a resonance tank together with the power transmission coil L3.

FIG. 10 is a schematic diagram of a wireless power transmission system including a wireless power transmission apparatus and a wireless power reception apparatus according to an embodiment of the present invention. The wireless power transmission system includes a power transmission unit 13, ), And a power supply unit 15, and a display unit 200. The wireless power receiving apparatus 20 includes a display unit 200 and a wireless power transmission device.

The functions and operation of the power transmission unit 13, the control units 11 and 12, and the power supply unit 15 are the same as those described in Figs.

The wireless power receiving apparatus 20 receives the wireless power to charge the rechargeable battery, and can irradiate the light according to the state of the rechargeable battery (e.g., charging degree of the rechargeable battery).

The wireless power receiving apparatus 20 includes a power receiving coil L4 for receiving the wireless power, a sixth capacitor C6 connected in parallel to the power receiving coil L4, a seventh capacitor C7 connected to the power receiving coil L4, A third switch element G3 connected between the seventh capacitor C7 and the ground and turned on and off in response to the third control signal con3, a third switch element G3 connected to the third switch element G3, An eighth capacitor C8 connected between the other terminal of the second switch element G2 and the ground, and an eighth capacitor C8 connected between the other terminal of the second switch element G2 and the ground. The second switch G2 is turned on / off in response to the second control signal con2, A display unit 200, and a power management unit 21 connected in parallel to each other. The display unit 200 may be implemented using a light emitting diode.

The power reception coils L4, the sixth capacitor C6, and the seventh capacitor C7 can receive power transmitted in a wireless manner.

The second switch element G2, the third switch element G3 and the eighth capacitor C8 are turned on in response to the second control signal con2 and the third control signal con3 to turn on the power reception coils L4, The capacitor C6, and the seventh capacitor C7 into the charging power and output the charging power.

The power management unit 21 may output the second control signal con2 and the third control signal con3. For example, the power management unit 21 may vary the second control signal con2 and the third control signal con3 according to the degree of charge of the rechargeable battery. The power management unit 21 can sense the charging level of the rechargeable battery by sensing the voltage Vbatt across the rechargeable battery.

10, when the rechargeable battery is charged and the voltage Vbatt across the rechargeable battery increases, the current supplied to the rechargeable battery also decreases, and thus the current flowing through the display unit 200 (for example, a light emitting diode) . Accordingly, as the rechargeable battery is charged, the light amount of the light irradiated through the display unit 200 (for example, a light emitting diode) decreases.

The sixth capacitor C6, the seventh capacitor C7, the third switch element G3, the second switch element G2, the eighth capacitor C8, the display unit 200, And the power management unit 21 may be disposed in the case of the battery.

That is, if the charging amount of the rechargeable battery is small and the charging of the rechargeable battery proceeds, the light amount of the light irradiated through the display unit 200 (for example, a light emitting diode) is large, And the optical element 100 has a small resistance value. Accordingly, the high-level sensing signal Vout is output, so that the control signal generator 12 outputs the first control signal con1 so that the wireless power can be transmitted or a larger wireless power can be transmitted. do.

When the rechargeable battery is charged and the charged amount of the rechargeable battery increases, the light amount of the light irradiated through the display unit 200 (for example, a light emitting diode) becomes small, The device 100 has a large resistance value. Accordingly, the low-level sensing signal Vout is output, so that the control signal generator 12 outputs the first control signal con1 so that the wireless power is not transmitted or smaller wireless power can be transmitted .

The configuration of the wireless power receiving apparatus 20 and particularly the configuration of the power reception coil L4, the sixth capacitor C6, the seventh capacitor C7, the second switch element G2, the third switch element G3, 8 capacitor C8 may be modified into various forms.

10, when the charged amount of the rechargeable battery of the wireless power receiving apparatus 20 is small, the amount of light irradiated through the display unit 200 (for example, a light emitting diode) is large, The amount of light to be irradiated through the display unit 200 (for example, a light emitting diode) is small when the charged amount of the rechargeable battery of the receiving apparatus 20 is large. However, it is also possible to set the opposite. That is, when the amount of the rechargeable battery of the wireless power receiving apparatus 20 is small, if the light amount of the light irradiated through the display unit 200 (for example, the light emitting diode) is small and the rechargeable battery of the wireless power receiving apparatus 20 is large The amount of light irradiated through the display portion 200 (for example, a light emitting diode) can be made large.

8) of the comparator (CMP in FIG. 8) of the comparator (1130 of FIG. 8), the first voltage output from the first voltage generator (1110 of FIG. 8) 8) of the comparator (CMP in FIG. 8) of the comparator (1130 of FIG. 8) is applied to the second voltage generator (1120 of FIG. 8) Terminal. Alternatively, when the control signal generator (12 of FIG. 7) outputs the first control signal con1 so that the power transmitter (13 of FIG. 7) transmits power when the sensing signal Vdet is low level, The first control signal con1 may be outputted so that the power transmission unit 13 (Fig. 7, 13) does not transmit power when Vdet is high level.

11 is a flowchart illustrating an operation of a wireless power transmission method according to an embodiment of the present invention.

First, it is determined whether the case is closed (step S100). For example, it is determined whether two terminals of the open / close sensing unit 110 of FIG. 1 are open or shorted.

If it is determined in step S100 that the case is closed, power is transmitted wirelessly (step S200). For example, power source Vs can be supplied to power transmitter 13 and control unit 14 of Fig. 7 may output the first control signal con1 for transmitting the power to the transmitter 13. The control unit 14 shown in Fig.

If it is determined in step S100 that the case is open, it does not perform the operation of transmitting power wirelessly (step S500).

Next, it is determined whether power is transmitted to the wireless power receiving apparatus using light (step S300). That is, it is determined whether or not the rechargeable battery of the wireless power receiving apparatus is sufficiently charged. For example, it is determined whether power is transmitted to the wireless power receiving apparatus by determining whether the light amount is equal to or greater than the reference value.

As a result of the determination in step S300, if power is being transmitted to the wireless power receiving apparatus, the operation of wirelessly transmitting power is maintained (step S400).

If it is determined in step S100 that the case is open, or if it is determined in step S300 that power is not being transmitted to the wireless power receiving apparatus, the wireless power transmitting apparatus does not perform the operation of transmitting the power.

The state of the rechargeable battery of the wireless power receiving apparatus such as the charged amount of the rechargeable battery of the wireless power receiving apparatus can be determined instead of determining whether the power is transmitted in step S300. In this case, in step S400, it is possible to adjust the size of power to be wirelessly transmitted according to the result determined in step S300.

All or some of the steps (steps S100 to S500) shown in FIG. 11 can be performed by the control signal generating unit 12 of FIG.

FIG. 12 is a view schematically showing an application example of a wireless power transmission apparatus according to an embodiment of the present invention, and a wireless power transmission apparatus according to an embodiment of the present invention may be mounted in a case 1-1.

The case 1-1 may include at least one internal space 121, 122 in which a device including a wireless power receiving device is fixedly disposed. The device including the wireless power receiving device may be positioned in the predetermined direction in the inner space 121, 122.

At least one optical element 101-1, 101-2, 101-3, and 101-4 may be disposed at a predetermined position in each of the at least one internal space 121, 122. Specifically, the apparatus including the wireless power receiving apparatus may include at least one or more display units, and the optical elements 101-1, 101-2, 101-3, and 101-4 may include a wireless power receiving apparatus And may be disposed at a position corresponding to the display unit when the device is disposed in each of the inner spaces 121 and 122. [

FIG. 13 is a diagram schematically illustrating an embodiment of a sensing unit of a control unit that can be used in an application example of a wireless power transmission apparatus according to an embodiment of the present invention shown in FIG. 12, in which the sensing unit 11-1 includes a first voltage A second voltage generating unit 1121, a first comparing unit 1131, a third voltage generating unit 1141, and a second comparing unit 1151. The generating unit 1111, the second voltage generating unit 1121,

The operation of the sensing unit 11-1 will be easily understood by referring to the description of FIG.

According to the wireless power transmission apparatus according to the embodiment of the present invention, the sensing unit 11-1 of FIG. 13 is provided for each of the inner spaces 121 and 122 of the case 1-1 of FIG. 12 .

13, the control signal generator (12 in FIG. 7) may output the first control signal con1 according to the detection signals det1 and det2. For example, when the detection signals det1 and det2 are all at a high level, the control signal generator (12 of FIG. 7) controls the power transmitter (13 of FIG. 7) One of the sense signals det1 and det2 outputs a control signal con1 and the power transmission unit 13 in FIG. 7 transmits a power having a relatively small size when one of the sense signals det1 and det2 is high level and one is low level And outputs the first control signal con1 so that the power transmission unit 13 in FIG. 7 does not transmit power when the detection signals det1 and det2 are all at the low level can do.

14 is a diagram schematically showing an embodiment of a device including a wireless power receiving apparatus according to an embodiment of the present invention.

The device 2-1 including the wireless power transmission device may include a plurality of display units 201 and 202. [ The lights irradiated according to the states of the rechargeable batteries of the device 2-1 including the wireless power transmission device may be different from the display units 201 and 202. [ For example, when the charged amount of the rechargeable battery is smaller than the first reference value, all of the plurality of display units 201 and 202 irradiate light having a light quantity equal to or greater than the reference value. When the charged amount of the rechargeable battery is larger than the first reference value, When the charged amount of the rechargeable battery is greater than the second reference value, the plurality of display units 201 and 202 irradiate light having a light amount equal to or greater than the reference value, Or less of the light amount.

Although the wireless power receiving apparatus of the present invention is a hearing aid, the wireless power receiving apparatus of the present invention can be installed in various wearable devices such as a smart glass.

Further, the case of the wireless power transmitting apparatus may have a proper form according to the apparatus including the wireless power receiving apparatus.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.

1 and 1-1: case 100, 100-1 to 100-4, and 101-1 to 101-4:
11, 11-1: sensing unit 12: control signal generator
13: wireless power transmission unit 20: wireless power reception device
200:

Claims (15)

A control unit for outputting a control signal in response to the received light; And
And a power transmitting section for wirelessly supplying power to the wireless power receiving apparatus in response to the control signal.
2. The wireless power transmission device according to claim 1,
Further comprising: a case for providing an internal space for accommodating the wireless power receiving apparatus, and the case in which the control unit and the power transmitting unit are mounted.
3. The apparatus of claim 2, wherein the power transmitter
And wirelessly supplying power when the case is closed, and shutting off the power supply when the case is opened.
The apparatus of claim 2, wherein the wireless power transmission apparatus
And an open / close sensing unit including two terminals opened or short-circuited depending on whether the case is opened or closed.
5. The apparatus of claim 4, wherein the control unit
And outputs the control signal in accordance with states of the two terminals of the opening / closing detection unit.
The apparatus of claim 2, wherein the wireless power transmission apparatus
And a sensing unit for outputting a sensing signal depending on whether the case is opened or closed.
7. The apparatus of claim 6, wherein the control unit
And outputs the control signal in response to the sensing signal.
The apparatus of claim 1, wherein the control unit
A sensing unit for outputting a sensing signal according to the amount of light received; And
And a control unit for outputting the control signal in response to the detection signal.
The apparatus of claim 8, wherein the sensing unit
A first voltage generator receiving a power supply and outputting a first voltage;
A second voltage generator for receiving the power supply and outputting a second voltage that varies depending on the amount of light received; And
And a comparator comparing the first voltage and the second voltage to output the sensing signal.
The plasma display apparatus of claim 9, wherein the second voltage generator
A resistor connected to a terminal to which the power source is input; And
And an optical element connected between the resistor and the ground and having a variable resistance value according to a light amount of the received light.
11. The method of claim 10, wherein the resistor
Wherein the variable resistor is a variable resistor whose resistance value varies in response to an adjustment signal input from the outside.
2. The wireless power transmission device according to claim 1,
And a power supply unit for supplying power to the control unit and the power transmission unit.
A power receiving unit for receiving wirelessly transmitted power and outputting a charging power for charging the rechargeable battery;
A power management unit for controlling the power receiver according to a charged amount of the rechargeable battery; And
And a display unit for irradiating light according to an amount of current flowing between the power receiving unit and the rechargeable battery.
14. The apparatus of claim 13, wherein the power receiver
A receiving unit for receiving power transmitted wirelessly using a receiving coil; And
And a converting unit for converting the power received by the receiving unit into the charging power in response to a control signal output from the power management unit.
14. The display device according to claim 13, wherein the display unit
And a light emitting diode connected between the rechargeable battery and the conversion unit.

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