KR102012660B1 - Apparatus and method for charging wireless power using contactless short-range wireless communication - Google Patents

Abstract

An embodiment of the present invention proposes a method for contactless short-range wireless communication when the application processor of the power receiver is turned off. To this end, an embodiment of the present invention, a non-contact short-range wireless communication unit for transmitting a report on the power reception state in a non-contact short-range wireless communication in response to the power transmission in the power transmitter, and the contactless as power is received from the power transmitter And a power management unit that performs wireless charging by activating only a low power wireless communication function of the short range wireless communication unit.

Description

Wireless charging apparatus and method using non-contact short-range wireless communication method {APPARATUS AND METHOD FOR CHARGING WIRELESS POWER USING CONTACTLESS SHORT-RANGE WIRELESS COMMUNICATION}

TECHNICAL FIELD The present invention relates to wireless charging devices and methods, and more particularly, to wireless charging devices and methods for controlling wireless power transmission through a contactless short range wireless communication channel.

With the development of IT technology and the introduction and diffusion of various portable electronic products, various technologies for providing power of portable electronic products are being developed. In particular, in the past, a technology for receiving power using a power line has been mainly used, but recently, development of a wireless power transmission technology (WPT) that can be wirelessly supplied with power has been actively developed.

In recent years, wireless charging or contactless charging technology has been developed as a wireless power transmission technology, and has been recently utilized in many electronic devices. For example, referring to FIG. 1, instead of connecting a separate charging connector to a mobile terminal corresponding to the power receiver 100, the battery is automatically charged by simply placing it on a charging pad corresponding to the power transmitter 110. It can be a system. The power transmitter 110 transmits power to the power receiver 100 using a wireless resonance signal through the resonator 120.

Recently, the wireless power transmission technology has been applied to small portable electronic devices, and various components and circuit arrangement methods have been used to reduce the size occupied by components and to increase their performance. 1 illustrates a mobile terminal as an example of a power receiver 100 to which a conventional wireless power transmission technology is applied. Referring to FIG. 1, the power receiver 100 includes a charging controller 150 for charging, a charger IC 160, a power management integrated circuit (PMIC) 170, and a battery 180. do.

In addition, there may be components for other functions in addition to the components for wireless charging. For example, components for contactless local area communication include a contactless local area wireless communication unit 130 and an application processor (AP) 140. In this case, a communication unit is required to communicate with the power transmitter 110 in connection with the wireless power reception operation. Therefore, the non-contact short range wireless communication unit 130 disposed in the existing mobile terminal may be used.

The non-contact short range wireless communication unit 130 may be any one of various types of short range wireless communication methods, such as Wi-Fi, Bluetooth (BT), Bluetooth low energy (Bluetooth Low Energy) so that any one of the methods may be used. : BLE) and IEEE802.15.4 (Zigbee) are supported. Specifically, the configuration of the non-contact short range wireless communication unit 130 is as shown in FIG.

Referring to FIG. 2, the non-contact short range wireless communication unit 130 may include at least one short range communication unit such as a Wi-Fi communication unit 210, a BT communication unit 220, a BLE communication unit 240, and a memory 230 connected to the Wi-Fi communication unit 210. And the RF switch 200 connected to any one of the Wi-Fi communication unit 210, the BT communication unit 220, and the BLE communication unit 240 according to the selected short range communication method. Here, the Wi-Fi communication unit 210, BT communication unit 220, BLE communication unit 240 may be used interchangeably with the terms Wi-Fi core, BT core, BLE core, respectively.

As described above, in the case of a combo chip in which a conventional BT, Wi-Fi, etc. are implemented as one single chip, the Wi-Fi communication unit 210 operates as a master core. Therefore, in order to communicate using BT and BLE communication methods, the Wi-Fi communication unit 210 that consumes a lot of power must be driven. In addition, in order to use the BT and BLE communication methods, the BT and BLE profiles necessary for the communication exist in the stack 145 in the application processor 140. Therefore, if the application processor 140 is driven, the BT and BLE communication methods may be used. The used charge becomes impossible.

As described above, the conventional BT communication unit 220 and the BLE communication unit 240 may access the stack 145 in which the BT and BLE profiles in the application processor 140 are stored only through the Wi-Fi communication unit 210. In addition, the data obtained from the stack 145 is only temporarily stored in the memory 230 existing on the Wi-Fi communication unit 210 side. In particular, since the BT and BLE profiles are present in the memory of the application processor 140, the application processor 140 cannot be turned on when the battery is dead. Therefore, the BT and BLE files cannot be imported, thereby charging using the BLE communication method. This is impossible. As such, the BT and BLE communication units 220 and 240 cannot be operated alone without the support of the Wi-Fi communication unit 210. Therefore, a new chip design is essential to keep the Wi-Fi, BT, and BLE functions as a combo chip.

At least one embodiment of the present invention provides a wireless charging apparatus and method capable of contactless short-range wireless communication without driving the application processor.

In addition, at least one embodiment of the present invention provides a wireless charging apparatus and method capable of contactless short-range wireless communication in the battery discharge situation while maintaining the form of one combo chip (WIBO, BT, BLE function).

In addition, at least one embodiment of the present invention provides a wireless charging apparatus and method that does not require a separate communication module for performing wireless charging by performing a wireless power transmission control for wireless charging by using contactless short-range communication.

One embodiment of the present invention for achieving the above, in the power receiver for performing a wireless charging using a contactless short-range wireless communication method, the first wireless communication unit for supporting the first wireless communication method and the second wireless communication method, respectively And a non-contact short range wireless communication unit including a second wireless communication unit and data required for the second wireless communication method from a first memory in an application processor when the level of the battery mounted in the power receiver is greater than or equal to a threshold. If the level is less than the threshold, and activates only the second wireless communication unit and comprises a power management unit for receiving the data required for the second wireless communication method from the second memory in the second wireless communication unit, the non-contact short-range wireless communication unit Power transmission from the power transmitter through the second wireless communication unit In response to the control, the power reception state is transmitted according to the second wireless communication scheme.

In addition, an embodiment of the present invention, in the method for performing a wireless charging by using a non-contact short-range wireless communication method in the power receiver, determining whether the level of the battery mounted on the power receiver is greater than the threshold, When the level is greater than or equal to the threshold, the process for receiving data required for contactless short-range wireless communication from the first memory in the application processor, and if the level of the battery is less than the threshold data required for contactless short-range wireless communication from the second memory in the contactless short-range wireless communication unit And receiving a report on the power reception state in response to the power transmission from the power transmitter and transmitting the report on the power reception state to the power transmitter through the non-contact short range wireless communication.

According to at least one embodiment of the present invention, since the BT communication unit acts as a master core, the BT communication unit and the BLE communication unit may be driven through the wireless charging power in a battery discharge situation, and thus, the wireless communication unit may be operated without the application processor. Wireless communication has the advantage of being possible.

1 is a block diagram of a conventional wireless charging transmission and reception system,
2 is a detailed block diagram illustrating an internal block diagram of the power receiver of FIG. 1;
3 is an internal block diagram of a power receiver for contactless short-range wireless communication according to an embodiment of the present invention;
4A and 4B are internal block diagrams of a power receiver for contactless short-range wireless communication according to another embodiment of the present invention;
5 is an internal block diagram of a power receiver for contactless short-range wireless communication according to another embodiment of the present invention;
6 is an operation flowchart of a power receiver for contactless short range wireless communication according to an embodiment of the present invention;
7 is a diagram illustrating an internal circuit of a power receiver according to an embodiment of the present invention;
8 is a diagram illustrating an internal circuit of a power receiver according to another embodiment of the present invention;
9 is a diagram illustrating an internal circuit of a power receiver according to another embodiment of the present invention;
10 is a flowchart illustrating operations according to a wireless charging input during wired charging and wired charging in an off state of a power receiver according to an embodiment of the present invention;
11 is a flowchart illustrating operations according to a wired charging input during wireless charging and wireless charging in an off state of a power receiver according to an embodiment of the present invention;
12 is an operation flowchart according to a wireless charging input during wired charging and wired charging in an on state of a power receiver according to an embodiment of the present invention;
13 is a flowchart illustrating operation of wireless charging in an on state of a power receiver according to an embodiment of the present invention;
14 is a flowchart illustrating operations according to a wired charging input during wireless charging in an on state of a power receiver according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific details such as specific components are shown, which are provided to help a more general understanding of the present invention, and it is understood that these specific details may be changed or changed within the scope of the present invention. It is self-evident to those of ordinary knowledge in Esau. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

At least one embodiment of the present invention performs a communication for wireless power transmission control using a non-contact short-range wireless communication between a wireless power transmitter for supplying wireless power and a wireless power receiver that receives the wireless power and performs charging. When the application processor is turned off, a method of wireless charging using only some components for wireless charging disposed inside the power receiver is disclosed. To this end, an embodiment of the present invention, a non-contact short-range wireless communication unit for transmitting a report on the power reception status in a non-contact short-range wireless communication in response to the power transmission in the power transmitter, and the power is received as the power transmitter And a power management unit that performs wireless charging by activating only a low power wireless communication function of the non-contact short range wireless communication unit.

In particular, an embodiment of the present invention will be described using a Bluetooth (Bluetooth: BT), Bluetooth Low Energy (BLE) method as a low-power wireless communication method of the non-contact short-range wireless communication method as an example. However, in the embodiment of the present invention, a low-power wireless communication method that consumes minimal power may use other short-range wireless communication methods such as Zeegbe communication and wireless IrDA. In addition, according to an embodiment of the present invention, the non-contact short range wireless communication unit may be configured as a single chip capable of supporting a wireless network method as well as a low power wireless communication method. Therefore, an embodiment of the present invention will be described taking a case of using a Wi-Fi (WiFi) method as a wireless network method. In addition, the wireless charging method according to an embodiment of the present invention may be applied to any device that performs charging by receiving a wireless power, such as wireless charging of electronic devices, wireless power supply for electric vehicles, wireless power supply for remote locations, ubiquitous wireless sensor power supply. Can be.

By doing so, wireless charging is performed by using a contactless short-range wireless communication module basically built in the power receiver without a separate communication module for performing wireless charging, thereby eliminating the need for a separate communication module for performing wireless charging. There is an advantage that can be lowered. In addition, Wi-Fi, BT, and BLE functions in a combo chip form a contactless short-range wireless communication module without driving an application processor. There is an advantage to enable wireless communication.

In order to help the understanding of the present invention, in the description of the present invention, a case where the power receiver is a mobile terminal will be described as an embodiment. Hereinafter, an internal configuration of a power receiver according to an embodiment of the present invention will be described with reference to FIG. 3.

Referring to FIG. 3, the power receiver 10 includes a non-contact short range wireless communication unit 300, an application processor 340, a power management unit 370, and a battery 390.

Meanwhile, the power receiver 10 includes a resonator for receiving a wireless resonance signal transmitted from a resonance signal generator of the power transmitter, and an alternating current (AC) type signal received through the resonator in addition to the above-described components. When received through a matching circuit, a rectifier for rectifying the alternating current (AC) power source into a direct current (DC) and a desired operating power source for the power output from the rectifying unit in a portable terminal to which the corresponding power receiver is applied. A DC / DC converter (or a constant voltage generator) for converting to (eg, + 5V) may be further included, but the following description will focus on the components related to the exemplary embodiment of the present invention.

First, the non-contact short range wireless communication unit 300 supports a wireless network function and a low power wireless communication function, the wireless network function is in charge of the Wi-Fi (WiFi) communication unit 345, and the low power wireless communication function is the BT communication unit 320, BLE The communication unit 325 is in charge. Here, the Wi-Fi communication unit 345 is connected to the RF switch 315 under the control of the BT communication unit 320 that operates as a master for connection or operation with an external server. At this time, the data required for the Wi-Fi communication is taken from the memory 350 (for example, random access memory (RAM)) connected to the Wi-Fi communication unit 345, which is included in the application processor 340 Data taken from the memory 342 is temporarily stored. For example, related profiles such as Wi-Fi, BT, and BLE stored in the nonvolatile memory 342 of the application processor 340 are loaded into the memory 350.

For example, the Wi-Fi communication unit 345, the BT communication unit 320, or the BLE communication unit 325 may store data obtained from the memory 342 in the application processor 340 in the memory 350. In this case, the Wi-Fi communication unit 345 and the BLE communication unit 325 may access or directly access the nonvolatile memory 342 through the BT communication unit 320. Also, for example, only the Wi-Fi and BT related profiles may be stored in the memory 350.

The Wi-Fi communication unit 345 or the BLE communication unit 325 is connected and operated according to the operation of the RF switch 315, and the switching of the RF switch 315 is performed under the control of the BT communication unit 320. If power is supplied to the low power wireless communication related component 310 or a power transmitter for wireless charging is found, the BLE communication unit 325 remains connected to the RF switch 315.

Specifically, when the BLE communication unit 325 communicates for the report on the power reception state, the RF switch 315 is connected to the BLE communication unit 325, and the BLE communication unit 325 is the BT communication unit 320 and the RF switch. The communication with the power transmitter is performed through 315. For example, the BLE communication unit 325 may request authentication by transmitting identification information of the power receiver 10 to the power transmitter for wireless charging, and may receive an authentication response according to the authentication result. As such, when the authentication is completed, the power manager 370 receives the wireless power through the resonator to charge the battery.

Accordingly, the BLE communication unit 325 transmits a report on the measurement of voltage, current, temperature, etc. in response to receiving the power to the power transmitter through the RF switch 315.

According to the exemplary embodiment of the present invention, it is assumed that functions such as BT, BLE, and Wi-Fi are implemented as one combo chip, and thus the BT communication unit 320 serves as a master core.

The BT communicator 320 performs a Bluetooth communication by a request from a peripheral external device, while the BLE communicator 325 mainly performs a short range communication for wireless charging. In this case, the BLE communication unit 325 generates a signal based on the BLE profile in order to transmit a status report on power reception to the power transmitter. Data necessary for such BLE communication is taken from the memory 342 in the application processor 340, for example, the BLE stack.

However, when the application processor 340 is powered off, the data for performing wireless power transfer from the application processor 340 cannot be obtained or the data can be obtained from the memory 342 in the application processor 340. A state in which power is lost may occur so that the application processor 340 cannot be kept on.

In consideration of such a case, the BLE communication unit 325 according to the embodiment of the present invention is implemented to include the BLE memory 330. The BLE memory 330 included in the BLE communication unit 325 may store data such as BT and BLE-related profiles, but preferably stores data related to wireless power transfer (WPT) according to an embodiment of the present invention. . The BLE memory 330 is a nonvolatile memory. For example, the Wi-Fi communication unit 345, the BT communication unit 320, or the BLE communication unit 325 may store data obtained from the memory 342 in the application processor 340 in the BLE memory 330. In this case, the Wi-Fi communication unit 345 and the BLE communication unit 325 may access or directly access the nonvolatile memory 342 through the BT communication unit 320. Also, for example, only the BLE-related profile may be stored in the BLE memory 330.

The application processor (AP) 340 may be configured as an integrated control chip that performs various functions such as data conversion, memory control, bus control, and the like of the central processing unit (CPU). The application processor 340 includes a nonvolatile memory 342, and the nonvolatile memory 342 includes data necessary for low power wireless communication such as a BT profile and a BLE profile, and data required for wireless network communication such as Wi-Fi ( Wi-Fi profile, etc.) are stored.

The application processor 340 operates through the following process. First, the power receiver 10 is set to wake up the mounted application processor 340 when a power-on request is input. Therefore, when the power-on request is input, the power receiver 10 checks the state of the battery 390 and wakes up the application processor 340 when the level of the battery is greater than or equal to the threshold.

On the other hand, when the level of the battery is below the threshold according to an embodiment of the present invention, the power receiver 10 does not drive the application processor 340, the low-power wireless communication-related components 310 in the contactless wireless local area communication unit 300 Only activate it. Similarly, when the power of the battery to be transmitted to the application processor 340 is lower than the threshold value while the application processor 340 is operating, the driving of the application processor 340 is stopped. Even in this case, the power receiver 10 activates only the low power wireless communication related component 310 in the contactless wireless local area communication unit 300. Accordingly, when the application processor 340 is powered off, the BLE communication unit 325 obtains data from the BLE memory 330 based on the data instead of obtaining data from the memory 345 in the application processor 340. Wireless charging will be performed.

If the battery supplying power below the threshold is supplied above the threshold and the application process 340 is turned on, the non-contact wireless local area communication unit 300 may be reset. In this case, since wireless charging may be cut off during initialization, the BLE communication unit 325 should be designed not to be initialized even during this initialization.

To this end, the power receiver 10 according to an embodiment of the present disclosure may notify the power transmitter before initialization so that communication for wireless charging is not interrupted while the contactless wireless local area communication unit 300 is initialized. In this case, the BLE communication unit 325 may recognize the driving of the application processor 340 based on a voltage applied when the application processor 340 is driven. The BLE communication unit 325 then transmits a signal not to terminate the communication to the power transmitter. Accordingly, the power transmitter maintains power transmission even if communication is not resumed for a predetermined time, for example.

Here, the BLE communication unit 325 stores the identification information, for example, ID, of the power receiver used to communicate with the power transmitter in the memory 350. The identification information may be temporarily stored in the memory 350 before being initialized to inform that the low power wireless communication related component 310 is the power receiver 10 which was in communication with the power transmitter even when the low power wireless communication related component 310 is reset.

The power transfer to the components of the contactless short-range wireless communication unit 300 including the application processor 340 is performed under the control of the power manager 370.

The power management unit (PMIC) 370 performs charging with an operating power source, and as the power is received from the power transmitter, the measured voltage Vrect in the power receiver 10, that is, the input voltage Vin and the output voltage Vout. And a micro controller unit (MCU) serving as a controller for measuring an output current (Iout) and the like.

The power manager 370 receives wired power supplied from the battery 390 mounted on the power receiver 10, and receives wireless power from the power transmitter to charge or contact the battery 390. Equipped with all the functions for transferring wireless power to the low-power wireless communication unit in the short-range wireless communication unit 300. At this time, in the embodiment of the present invention, the power delivered from the battery 390 is defined as wired power, and the power received from the power transmitter through the resonator is defined as wireless power. The power management unit 370 including the control unit determines the power reception state according to the measured voltage / current information, and transfers the information on the power reception state to the BLE communication unit 325 through the BLE communication unit 325. It serves as a power transmitter.

3 illustrates a case in which the charger IC and the MCU are integrated in the power manager 370, the power manager 380 and the charger 385 may be separately separated and implemented as shown in FIG. 4A. Of course you can. Alternatively, as shown in FIG. 4B, the MCU 410 may be located in the low power wireless communication related component 400.

4A and 4B illustrate an internal block of a power receiver for contactless short range wireless communication according to another embodiment of the present invention. In this case, the charger 385 receives the power received from the power transmitter, and the power manager 380 receives the power transmitted from the battery 390. In this case, measurement of voltage, current, temperature, etc. according to the reception of power from the power transmitter may be performed under the control of the MCU in the charging unit 385. In this case, the MCU may be located in the charging unit, or may be replaced by a computing device in the BLE communication unit or the BT communication unit. When using a computing device in the BLE communication unit or the BT communication unit, there is a need for an interface for transferring information obtained from the charging unit to the computing unit in the BT / BLE communication unit.

On the other hand, Figure 5 illustrates the internal configuration of a power receiver according to another embodiment of the present invention.

In FIG. 5, the BT communication unit 320 and the BLE communication unit 325 are included in the low power wireless communication related configuration unit 500. At this time, by implementing the RF control module 510 in the BT communication unit 320, the BLE communication unit 325 is not connected to the outside through the RF switch 315 under the control of the BT communication unit 320 bypass (by- Communicate with the outside in the form of pass). At this time, since the BLE communication unit 325 has the BLE memory 330 while the application processor 340 is powered off, it is not necessary to bring data from the memory 342 of the application processor 340. Accordingly, the BLE communication unit 325 converts the sensing information transmitted from the power manager 370 or the state information according to the current power reception according to a format based on the BLE profile and transmits the converted information.

Hereinafter, the operation of the power receiver will be described with reference to FIG. 6.

Referring to FIG. 6, the power receiver determines whether wireless power through the resonator is received in step 600. If the wireless power is not received, it is determined in step 605 whether wired power through a battery or the like is received. If the wired power is received, all of the components in the application processor and the contactless short-range wireless communication unit are driven in step 615. In this case, it is assumed that the wired power is the minimum power to drive the application processor. In operation 620, the BLE function is performed to report the power reception state with reference to the stack in the application processor.

In contrast, when the wireless power is received in step 600, it is determined whether the battery is discharged in step 610. Here, the battery discharge state refers to a case where the level of the battery mounted in the power receiver is less than the threshold. If the battery is not discharged, it means that the level of the battery is greater than or equal to the threshold. On the contrary, when the battery level is lower than the threshold level, the power receiver 10 drives only the low power short-range wireless communication-related component in step 625 and then refers to the BLE stack in the BLE communication unit in step 630. In this case, steps 600 and 605 may be omitted, and step 615 or 625 may be performed by determining whether the battery is discharged in step 610 without determining whether the wireless power and the wired power are received.

Subsequently, when receiving information on the wireless charging state from the power manager in step 635, the received information is transmitted in a contactless short-range wireless communication method in step 640. By doing so, it is possible to perform wireless charging using the short range wireless communication unit even in the low power mode by using the short range wireless communication unit basically installed in the power receiver.

On the other hand, Figure 7 is a block diagram of the internal circuit of the power receiver according to an embodiment of the present invention.

In FIG. 7, connection relations and input signals between the components are illustrated. Here, the internal circuit configuration of the power receiver may be configured as in FIG. 7, but may alternatively be configured as in FIGS. 8 and 9. 8 is a diagram illustrating an internal circuit of a power receiver according to another embodiment of the present invention, and FIG. 9 is a diagram illustrating an internal circuit of a power receiver according to another embodiment of the present invention. Among the components in FIGS. 7 to 9, the components that play the same role as the components in FIG. 3 are denoted by the same numerals.

First, a power input terminal of the WIFI / BT combo chip (IC) 310 may be largely classified into two types. That is, it has a power input terminal for wired charging and a power input terminal for wireless charging. Switching between the two power input terminals can have a great effect on power efficiency in the power receiver. Therefore, switching between these two power input stages can be performed based on the following table. Table 1 below illustrates the VIO 1.8V power switch table.

From PMIC From Power ICs for Wireless Charging Power block input power source inside Combo L L COMBO IC OFF L H POWER IC for Wireless Charging H H FROM WIRELESS POWER IC H L VIO FROM PMIC

Referring to Table 1, when the 'L' signal is input from the PMIC 380 and the 'L' signal is also input from the POWER IC for wireless 385, the wired charging and Since no input is present for wireless charging, the combo IC, ie the WIFI / BT combo chip (IC) 310, remains off. On the other hand, when the 'L' signal is input from the PMIC 380 and the 'H' (High) signal is also input from the wireless charging power IC 385, this indicates that there is a power input for wireless charging. The BT combo chip (IC) 310 receives power from the wireless charging power IC 385. Also, when the 'H' signal is input from the PMIC 380 and the 'H' signal is also input from the wireless charging power IC 385, this is when the power input for wired charging and the power input for wireless charging are simultaneously present. In this case, since charging in a wired manner is stable in this case, the WIFI / BT combo chip (IC) 310 receives power from the PMIC 380. In addition, when the 'H' signal is input from the PMIC and the 'L' signal is also input from the wireless charging power IC 385, this indicates that there is only a power input for wired charging, and thus the WIFI / BT combo chip (IC). 310 receives power from PMIC 380.

Meanwhile, Table 2 illustrates the VBATT power switch table.

From battery 3.3V From Wireless Power IC Power block inside combo
Input power source L L COMBO IC OFF L H FROM WIRELESS POWER IC H H VBATT FROM BATTERY H L VBATT FROM BATTERY

In Table 2, when the 'H' signal is input from the battery 390 and the 'H' signal is also input from the wireless charging power IC 385 and the 'H' signal is input from the battery 390, the wireless charging is performed. Compared with Table 1, when the 'L' signal is also input from the IC 385, the power VBATT is input from the battery 390 instead of the PMIC 380.

As described above, when 1.8V power is supplied from the wireless charging power IC 385 to the WIFI / BT combo chip (IC) 310, the BLE function in the WIFI / BT combo chip (IC) 310 starts automatically. do.

Hereinafter, an operation according to wired charging and / or wireless charging will be described in an internal circuit diagram of the power receiver of FIGS. 7 to 9.

10 is a flowchart illustrating operations according to an input of wireless charging during wired charging and wired charging in an off state of a power receiver according to an embodiment of the present invention.

Referring to FIG. 10, when the power receiver 10 detects wired power reception in operation 1000 in an off state, the power receiver 10 supplies power to all components in the application processor 340 and the non-contact short-range wireless communication unit in operation 1005. For example, a user may be connected to a wired charging terminal by using an external device connection unit such as a charging connection jack of the power receiver 10. As such, when the wired charger is connected to the power receiver 10, in FIG. 7, the IF PMIC senses the wired connection and gives an ON signal to the PMIC 380, respectively, in order to supply power to the battery and the system, respectively, to supply VBattery and VPH_PWR power. To supply. Then, the PMIC 380 supplies power to the display unit, the clock, the clock, the application processor 340, the WIFI / BT combo chip (IC) 310, and the like, where power is required for the minimum power mode. In this case, a 1.8V clock power is used for the WIFI / BT combo chip (IC) 310.

The PMIC 380 then applies POR_RESET to the application processor 340. The application processor 340 then resets the peripheral area while booting up and initializes the GPIO. At this time, when the user presses the hold key because he wants to know the charging state, the application processor 340 processes the key input. Accordingly, an icon indicating the charging state may be displayed on the display unit. At this time, since the wired charging is in progress, the WIFI / BT combo chip (IC) 310, which is a component for wireless charging, is preferably not operated. Accordingly, if wireless power reception is not detected during wired charging in step 1010, the process returns to step 1000 and determines whether wired power reception is continued. If the wired power reception is interrupted, for example, if the user removes the wired charger from the power receiver 10, the power supply to all the systems in the power receiver 10 is stopped and remains off, as in step 1015. .

On the other hand, when the wireless power is received in step 1010, for example, when the user puts the power receiver on the wireless charging pad while the wired charging terminal is connected to the power receiver 10 for charging, the power IC 385 Is applied to the WIFI / BT combo chip (IC) 310. Accordingly, in step 1020, the low power short-range wireless communication-related components, that is, the WIFI / BT combo chip (IC) 310 is enabled, and boots using the BLE stack inside the WIFI / BT combo chip (IC) 310. . In this case, the power IC 385 may receive the wired input detection signal (Wired input det.) By the TA-DET pin to recognize that the wired charging is in progress. Accordingly, the POWER IC 385 sets that the wire is being charged in the internal register (REGISTER) and sends a start signal INT to the MCU.

In addition, the WIFI / BT combo chip (IC) 310 may grasp the situation of the power IC 385 through I2C communication. In operation 1025, the WIFI / BT combo chip (IC) 310 determines whether the wired charging is performed before starting wireless charging.

If wired charging is interrupted, charging is performed using wireless power in step 1030. Specifically, when the wired charging is disconnected, the start signal INT is generated because the TA-DET pin of the POWER IC 385 becomes “L”. The WIFI / BT combo chip (IC) 310 then identifies what has happened inside the POWER IC 385 and notifies the power transmitter. Accordingly, the power transmitter increases the power transmitted to the power receiver 10 and issues a charge command (Charger EN). Then, the WIFI / BT combo chip (IC) 310 of the power receiver 10 causes the power IC 385 to transmit power to the IF PMIC. That is, power is transferred to the IF PMIC to charge the battery 390.

On the other hand, if it is determined that the wired power is being received in step 1025, that is, the WIFI / BT combo chip (IC) 310 is determined to be simultaneously charging the wired / wireless, in step 1035, the power switch (POWER SW) is selected from the wired charge. In use, the power receiver 10 may communicate that the wired charging is in progress through communication with the power transmitter. Accordingly, the wired charging may be performed by the IF PMIC supplying power to all the components in the power receiver 10.

Accordingly, the power transmitter may output an indication that the wired charging is being performed on the wireless charging pad. Then, the power transmitter can reduce the power sent to the power receiver 10. Alternatively, the power transmitter may wait without transmitting power for a predetermined time until wireless charging with the power receiver 10 is resumed.

Meanwhile, FIG. 11 is a flowchart illustrating an operation according to a wired charging input during wireless charging and wireless charging in an off state of a power receiver according to an embodiment of the present invention.

Referring to FIG. 11, when wireless power reception is detected in step 1100 while the power receiver 10 is in an off state, the low power short-range wireless communication related component, that is, the WIFI / BT combo chip (IC) 310 is enabled in step 1105. Then boot using the BLE stack. Specifically, when the reception of power for wireless charging is detected, the POWER IC 385 is supplied with 1.8V power to the WIFI / BT combo chip (IC) 310, and thus the WIFI / BT combo chip (IC) 310. Is self-enabled, running the 37.4Mhz crystal and booting into the BLE stack. At this time, since the WIFI / BT combo chip (IC) 310 is not applied to the VIO of the WIFI / BT combo chip (IC) 310 from the PMIC 380, it is determined that the wireless charging is in the off state. In operation 1110, the power transmitter notifies the wireless transmitter of the OFF state.

In response to the charging command received from the power transmitter, the WIFI / BT combo chip (IC) 310 performs charging using wireless power in step 1115. Specifically, the WIFI / BT combo chip (IC) 310 activates CHARGER_EN and sends power to the wireless charging POWER IC 385 as an IF PMIC. That is, power is transferred to the IF PMIC to charge the battery 390. The powered IF PMIC delivers an on-signal to the PMIC 380 and supplies VBattery and VPH_PWR power to power the battery and the system as a whole. Then, the PMIC 380 starts operation as the on signal is transmitted, and supplies power to the display unit, the clock, the clock, the application processor 340, the WIFI / BT combo chip (IC) 310, and the like. .

The application processor 340 initializes the GPIO after first resetting peripheral ICs in the boot-up phase. The WIFI / BT combo chip (IC) 310 may be reset by signals such as BT_REG_ON, WL_REG_ON, and the like transmitted from the application processor 340. At this time, when the VIO of the WIFI / BT combo chip (IC) 310 receives 1.8V power from the PMIC 380, the internal SW MUX circuit uses the power of the PMIC 380. Here, even if the signal BT_REG_ON from the AP indicates the "L" state, the WIFI / BT combo chip (IC) 310 operates because of the 1.8V power transmitted from the POWER IC 385.

Subsequently, in step 1120, the WIFI / BT combo chip (IC) 310 determines whether the wireless charging is completed. If the wireless charging is completed, the power transmitter is notified of the completion of charging in step 1125. In detail, when the WIFI / BT combo chip (IC) 310 monitors that the current flowing out from the POWER IC 385 is less when fully charged, the WIFI / BT combo chip (IC) 310 indicates the completion of charging. Accordingly, the power transmitter may indicate completion of charging on the wireless charging pad.

Meanwhile, an input for wired charging may occur during wireless charging. For example, the user may connect the wired charging terminal while the power receiver 10 is placed on the wireless charging pad.

Therefore, before the wireless charging is completed in step 1120, it is determined whether the wired power reception is detected during the wireless charging in step 1130. If wired power reception is not detected, the process returns to step 1115 to perform wireless charging. In contrast, when wired power reception is detected, power is supplied to all of the components in the application processor 340 and the non-contact short range wireless communication unit in step 1135. Specifically, if there is an input for wired charging during wireless charging, wired charging is selected, and the IF PMIC charges the power receiver 10 using wired charging power. In addition, a 'H' signal is detected in the TA-DET of the POWER IC 385, and a start signal INT is generated. The WIFI / BT combo chip (IC) 310 uses an I2C to provide a POWER IC 385. You can grasp the event situation of). That is, referring to Table 1, since the 'H' signal is detected from the POWER IC 385 and the 'H' signal is detected from the PMIC 380 according to the wired charging connection, the WIFI / BT combo chip (IC The source of the input power inside the 310 may be determined as wired charging. Accordingly, for the wired charging, the WIFI / BT combo chip (IC) 310 performs charging using wired power in step 1140 and informs the power transmitter that the wired charging is in progress. Subsequently, the WIFI / BT combo chip (IC) 310 may deactivate the CHARGER EN of the POWER IC 385.

On the other hand, the power transmitter may output an indication that the wired charging is being performed on the wireless charging pad. Then, the power transmitter can reduce the power sent to the power receiver 10. At this time, when the user stops the wired charging, a 'L' signal is detected in the TA-DET of the POWER IC 385, and a start signal INT is generated, and the WIFI / BT combo chip (IC) 310 is generated. By using I2C, it can be seen that the event situation of the POWER IC 385 indicates that the wired charging has been stopped. Accordingly, the WIFI / BT combo chip (IC) 310 may request that the power transmitter increase the output power again. In other words, if wired charging is interrupted, the wireless charging is required to continue charging.

As described above, when the wireless receiver, the wired charging, the wired charging input during the wireless charging, and the wireless charging input during the wired charging are generated while the power receiver 10 is turned off, the WIFI / BT combo chip (IC) 310 may be used. Since it does not operate at all or operates based on the BLE stack from its internal memory, the operation in the SA (Stand Alone) mode has been described. That is, if there is not enough power to wake the application processor or the power button is not pressed to maintain the off state, the full stack may not be provided from the application processor 340, and thus may not operate in the NSA mode.

However, when the power receiver 10 is turned on, when the wireless charging, the wired charging, the input of the wired charging during the wireless charging, the input of the wireless charging during the wired charging occurs, the mode switching between the SA mode and the NSA mode occurs. Accordingly, the WIFI / BT combo chip (IC) 310 may operate based on the BLE stack of the internal memory, or may operate based on the full stack from the application processor 340.

Hereinafter, operation of the internal circuit components of the power receiver 10 when the power receiver 10 is in an on state will be described.

12 is a flowchart illustrating operations according to an input of wireless charging during wired charging and wired charging in an on state of a power receiver according to an embodiment of the present invention.

Referring to FIG. 12, it is monitored whether wired power is received in operation 1200 in the on state of the power receiver 10. For example, when the user inserts the wired charging terminal into the charging terminal of the power receiver 10 for wired charging, the wired power is received. Specifically, the IF PMIC provides an ON signal to the PMIC 380 and supplies VBattery and VPH_PWR power to supply power to the battery and the system, respectively. Accordingly, the application processor 340 may determine that the wired charging is in progress and display a charging icon. In this case, the application processor 340 transmits the 'L' signal to the WIFI / BT combo chip (IC) 310 by the BT_REG_ON. Then, as shown in Table 2, the WIFI is based on the 'L' signal output from the battery 390 through the application processor 340 and the 'L' signal indicating no connection for wireless charging from the POWER IC 385. The / BT combo chip (IC) 310 is not operated.

Thereafter, the application processor 340 outputs an 'H' signal by BT_WAKE to wake up a circuit unit in charge of contactless short-range wireless communication when communication with the WIFI / BT combo chip (IC) 310 is required, and by 'BT_REG_ON' The H 'signal is transmitted to the WIFI / BT combo chip (IC) 310. Then, the WIFI / BT combo chip (IC) 310 starts to operate. Accordingly, the 'H' signal is transmitted to the application processor 340 by BT_HOST_WAKE, and the UART communicates with the application processor 340. As such, when the WIFI / BT combo chip (IC) 310 wakes up, the application processor 340 outputs an 'L' signal by BT_WAKE when it is used in communication with a BT earset and a BT product or when communication fails for a long time. The / BT combo chip (IC) 310 goes to sleep. In this case, in step 1205, the WIFI / BT combo chip (IC) 310 may receive, for example, a BT 4.0 full stack from the application processor 340, load it into a RAM, and communicate with a power transmitter based on the full stack. have.

Meanwhile, while performing wired charging, an input for wireless charging may occur. For example, there may be a case in which the user places the power receiver 10 on the wireless charging pad while the user connects the wired charging terminal to the power receiver 10.

Therefore, before the wired charging is completed, it is determined whether the wireless power reception is detected during the wired charging in step 1210. If the wireless power reception is detected, the IF PMIC charges the power receiver 10 using wired charging power.

In step 1215, it is determined whether the low power short-range wireless communication-related component, that is, the WIFI / BT combo chip (IC) 310 is activated. That is, the application processor 340 determines whether the state 'H' is transmitted to the WIFI / BT combo chip (IC) 310 by the BT_REG_ON.

If the WIFI / BT combo chip (IC) 310 is in an active state, the WIFI / BT combo chip (IC) 310 is already booted up to the full stack, and the application processor 340 is an external device. The WIFI / BT combo chip (IC) 310 is controlled to communicate with an BT device, a wireless charging pad, and the like to connect with an external device. Accordingly, in step 1220, the WIFI / BT combo chip (IC) 310 requests the power transmitter to reduce the output power using the full stack to charge the wire using the wired power.

Specifically, when wireless power is received, 1.8V / 3.7V is sent from the POWER IC 385 to the WIFI / BT combo chip (IC) 310, and the 'H' signal is output by the TA-DET. The signal INT is transmitted to the WIFI / BT combo chip (IC) 310. Then, the WIFI / BT combo chip (IC) 310 detects the situation of the POEWR IC 385 with I2C when the 1.8V input or start signal (INT) comes from the POWER IC 385, and identifies the wired and wireless simultaneous charging. do. Accordingly, the WIFI / BT combo chip (IC) 310 requests power adjustment since the wired and wireless simultaneous charging situation is performed when communicating with the power transmitter. Here, the WIFI / BT combo chip (IC) 310 may communicate with not only the BT earset but also the power transmitter by using one antenna by dividing the time when the BT / BLE / WIFI is simultaneously connected.

However, if the wired power reception is stopped in step 1230, the power transmitter requests the increase of the output power using the full stack in step 1235. Specifically, when the wired charging terminal is withdrawn from the power receiver 10, the POWER IC 385 detects the 'L' signal by the TA-DET pin, and the start signal to the WIFI / BT combo chip (IC) 310. Generates (INT). Then, the WIFI / BT combo chip (IC) 310 may recognize an event situation of the POWER IC 385 in a state where there is a 1.8V input due to wireless charging, and request that the power transmitter increase the output power. In response, when the output power is increased by the power transmitter, the WIFI / BT combo chip (IC) 310 enables the BUCK output of the POWER IC 385 to send power to the IF PMIC, and the IF PMIC is supplied to the battery. Perform a charge.

On the other hand, in step 1215, when the low power short-range wireless communication-related component, that is, the WIFI / BT combo chip (IC) 310 is not activated, that is, the application processor 340 transmits the 'H' signal by the BT_REG_ON to the WIFI / BT. Before the transfer to the combo chip (IC) 310, the signal by BT_REG_ON is always the 'L' signal.

Accordingly, the WIFI / BT combo chip (IC) 310 detects 1.8V power corresponding to wireless charging in the early stage of receiving power from the POWER IC 385 and enables itself to boot up using the BLE stack. Specifically, when the wireless power is received, the power IC 385 starts to operate, and the power IC 385 transmits 1.8V / 3.7V output and at the same time, the signal by the TA-DET pin is an 'H' signal. And the start signal INT is sent to the WIFI / BT combo chip (IC) 310. Then, the WIFI / BT combo chip (IC) 310 senses the 1.8V output of the POWER IC 385 and operates 37.4Mhz crystal to boot, and accesses the POWER IC 385 using I2C. Find out what the situation is.

Subsequently, the WIFI / BT combo chip (IC) 310 notifies the application processor 340 of the wireless charging, and the application processor 340 activates the BT function. However, when the wireless charging is finished, that is, when the user removes the power receiver 10 from the wireless charging pad, the WIFI / BT combo chip (IC) 310 is disabled. However, when the application processor 340 notifies that the WIFI / BT combo chip (IC) 310 is charging wirelessly, the application processor 340 recognizes that the wired charging and the wireless charging are simultaneously applied, and communicates with the power transmitter for simultaneous wireless / wireless charging. Activate the BT function to notify and request power adjustment. To this end, the application processor 340 transmits the 'H' signal to the WIFI / BT combo chip (IC) 310 by the BT_REG_ON.

Then, in step 1225, the WIFI / BT combo chip (IC) 310 notifies the reset of the WIFI / BT combo chip (IC) 310 in the power transmitter and resumes communication using the full stack. Specifically, since the WIFI / BT combo chip (IC) 310 will be reset, the power transmitter is requested to maintain power transmission even if there is no communication for a preset time, for example, two seconds. In response to this, a response may be received from the power transmitter to maintain power transmission, and after the reset, the WIFI / BT combo chip (IC) 310 may take a full stack from the application processor 340 and reset the power transmitter based on the power transmitter. Wireless charging can be maintained by resuming communication. When wireless charging is input during the wired charging, the application processor 340 may select the wired charging but at the same time maintain the wireless charging uninterrupted. However, when the wired power reception is interrupted as in step 1230 after the wireless charging is input, in step 1235, the output power may be increased using the full stack.

Meanwhile, FIG. 13 is a flowchart illustrating operation of wireless charging in an on state of a power receiver according to an embodiment of the present invention.

Referring to FIG. 13, in operation 1300, the wireless power is monitored in the on state of the power receiver 10. For example, wireless power may be received when a user places the power receiver 10 on a wireless charging pad for wireless charging. At this time, since the power receiver 10 is on, the WIFI / BT combo chip (IC) 310 is supplied with 1.8V power from the battery 390 through the PMIC 380.

If wireless power reception is detected, it is determined in step 1305 whether the low-power short-range wireless communication-related component, that is, the WIFI / BT combo chip (IC) 310 is activated. If it is not activated, that is, when the signal by the BT_REG_ON from the application processor 340 is the 'L' signal and 1.8V power is detected from the POWER IC 385, the WIFI / BT combo chip (IC) 310 in step 1310 ) Enable itself to boot using the BLE stack. Then, the WIFI / BT combo chip (IC) 310 controls to send power to the IF PMIC by activating the CHARGER_EN of the POWER IC 385 after communicating with the power transmitter. Accordingly, the powered IF PMIC transmits an ON signal to the PMIC 380 and performs wireless charging by supplying VBattery and VPH_PWR power to supply power to the battery and the system, respectively.

In addition, the PMIC 380 notifies the application processor 340 of the wireless charging as the signal from step 1315 is transmitted. The application processor 340 may determine that the wireless charging is in progress, and transmits an 'H' signal by BT_REG_ON to activate BT. In response, the WIFI / BT combo chip (IC) 310 notifies itself that the power transmitter will be reset in step 1320. This serves to request that the power transmitter maintain its power even if there is no communication for a preset time e.g. 2 seconds since it will reset itself. After the reset, the WIFI / BT combo chip (IC) 310 continues wireless charging in step 1330 by resuming communication with the power transmitter using the full stack in step 1325. In operation 1335, it is determined whether the wireless charging is completed. To this end, the WIFI / BT combo chip (IC) 310 may determine whether the wireless charging is completed by monitoring whether the current flowing out from the power IC 385 is reduced. If it is determined that the wireless charging is completed, the WIFI / BT combo chip (IC) 310 notifies the power transmitter of the completion of charging in step 1340.

On the other hand, if the signal by the BT_REG_ON from the application processor 340 is the 'H' signal in step 1305, the WIFI / BT combo chip (IC) 310 may be already booted up to the full stack have. Since wireless power has been received in this state, 1.8V / 3.7V power is transferred from the POWER IC 385 to the WIFI / BT combo chip (IC) 310. Accordingly, the WIFI / BT combo chip (IC) 310 can grasp the situation of the POWER IC 385 as the 1.8V input or the start signal (INT) is input from the POWER IC 385, thereby knowing that it is wirelessly charging. Can be.

Therefore, the WIFI / BT combo chip (IC) 310 communicates with the power transmitter using the full stack in step 1325. Subsequently, the WIFI / BT combo chip (IC) 310 allows the power IC 385 to transmit power to the IF PMIC to perform charging using wireless power as in step 1330.

On the other hand, after notifying the power transmitter of the completion of the wireless charging, the power transmitter may reduce the power transmitted to the power receiver, and alternatively, the power transmitter may inform the end of the wireless charging. In this case, the WIFI / BT combo chip (IC) 310 may inform the application processor 340 that the power supply by the power transmitter will be cut off upon completion of charging.

Meanwhile, FIG. 14 is a flowchart illustrating an operation according to a wired charging input during wireless charging in an on state of a power receiver according to an embodiment of the present invention.

Referring to FIG. 14, since operations in steps 1400 to 1430 are the same as operations in steps 1300 to 1330 of FIG. 13, a detailed description thereof will be omitted. However, it is determined whether wired power reception is detected in step 1435 while performing charging using wireless power. If wired power reception is detected, charging is performed using wired power in step 1440 to inform the power transmitter that the wired charging is being performed. By doing so, it is possible to request adjustment of the power output from the power transmitter.

However, in the BT deactivation state, that is, when the 'L' signal is transmitted by the BT_REG_ON, the WIFI / BT combo chip (IC) 310 operates as the BLE stack and the 'H' signal by the BT_REG_ON from the application processor 340. After is passed, it is reset and can operate using the full stack. On the contrary, since the signal by BT_REG_ON is 'H' signal from the application processor 340 in the BT enabled state, the WIFI / BT combo chip (IC) 310 may be already booted up to the full stack. You can operate using the stack.

According to an embodiment of the present invention as described above, even when the application processor cannot be turned on, the wireless charging is performed using the BLE stack separately stored in the internal memory of the Wi-Fi / BT combo chip (IC) after waking up using the power of the POWER IC. As a result, communication for wireless charging is possible.

It will be appreciated that embodiments of the invention may be realized in the form of hardware, software or a combination of hardware and software. Any such software may be, for example, volatile or nonvolatile storage, such as a storage device such as a ROM, whether or not removable or rewritable, or a memory such as, for example, a RAM, a memory chip, a device or an integrated circuit. Or, for example, CD or DVD, magnetic disk or magnetic tape and the like can be stored in a storage medium that is optically or magnetically recordable and simultaneously readable by a machine (eg computer). It will be appreciated that a storage unit that can be included in a power receiver is an example of a machine-readable storage medium suitable for storing a program or programs containing instructions for implementing embodiments of the present invention. Accordingly, the present invention includes a program comprising code for implementing the methods described in any claim herein and a machine-readable storage medium storing such a program. In addition, such a program may be transferred electronically through any medium, such as a communication signal transmitted via a wired or wireless connection, and the present invention includes equivalents thereof as appropriate.

In addition, the power receiver may receive and store the program from a program providing apparatus connected by wire or wirelessly. The program providing apparatus includes a memory for storing a program including instructions for causing the power receiver to perform a wireless charging method using a contactless short range wireless communication method, information necessary for a wireless charging method using a contactless short range wireless communication method, and the like; It may include a communication unit for performing wired or wireless communication with the power receiver, and a controller for automatically transmitting the program or the corresponding program to the power receiver.

In the above description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the equivalent of claims and claims.

Claims (17)

A power receiver for performing wireless charging using a contactless near field communication method,
A non-contact short-range wireless communication unit including a first wireless communication unit and a second wireless communication unit supporting the first wireless communication method and the second wireless communication method, respectively;
When the level of the battery mounted on the power receiver is greater than or equal to the threshold, data necessary for the second wireless communication method is provided from the first memory in the application processor. When the level of the battery is less than the threshold, only the second wireless communication unit is activated. And a power management unit for receiving data necessary for the second wireless communication scheme from a second memory in the second wireless communication unit.
The non-contact short range wireless communication unit transmits a report on a power reception state according to the second wireless communication method in response to the power transmission from the power transmitter through the second wireless communication unit. Power receiver to perform wireless charging.
The method of claim 1, wherein the first wireless communication unit and the second wireless communication unit,
And a wireless receiver using a wireless network communication unit and a low power wireless communication unit, respectively.
The wireless network communication unit of claim 2,
A power receiver for performing wireless charging using a contactless short-range wireless communication method characterized in that the operation based on the Wi-Fi (WiFi) method.
The method of claim 2, wherein the low power wireless communication unit,
A power receiver for performing a wireless charging using a non-contact short-range wireless communication method characterized in that it comprises a Bluetooth communication unit and a Bluetooth low energy communication unit.
The method of claim 1, wherein the application processor,
And is activated when the level of the battery is greater than or equal to a threshold, and deactivated when the level of the battery is less than or equal to a threshold.
The method of claim 5, wherein the contactless short-range wireless communication unit,
When the application processor is activated in an inactive state, the contactless short range wireless communication unit is notified to the power transmitter that is to be reset, and after the reset, data received for the second wireless communication scheme from the first memory in the application processor is received. A power receiver for performing wireless charging using a contactless short-range wireless communication method characterized by resuming communication with the transmitter.
The method of claim 1, wherein the power management unit,
Power for performing wireless charging using a non-contact short-range wireless communication method when the level of the battery mounted to the power receiver is greater than or equal to a threshold, activating the first wireless communication unit and the second wireless communication unit of the non-contact short range wireless communication unit; receiving set.
The method of claim 7, wherein the second wireless communication unit,
When the first wireless communication unit is activated, non-contact short-range wireless communication is provided through the first wireless communication unit data required for the second wireless communication method from the first memory in the application processor connected to the first wireless communication unit. Power receiver performing wireless charging using the scheme.
The method of claim 1, wherein the power management unit,
Implemented by a PMIC (Power Management Integrated Circuit), the contactless short-range wireless communication, characterized in that for measuring the power reception state in response to the power transmission in the power transmitter and transmits to the second wireless communication unit in the non-contact short-range wireless communication unit. Power receiver performing wireless charging using the scheme.
The method of claim 1, wherein the first memory in the application processor,
And a Bluetooth receiver and a Bluetooth low energy profile as data necessary for the second wireless communication method.
The method of claim 1, wherein the second memory in the second wireless communication unit,
And a partial power profile related to a wireless power transfer (WPT) and a Bluetooth low energy profile as data required for the second wireless communication method.
The method of claim 1, wherein the second memory in the second wireless communication unit,
And a wireless receiver using a non-contact short range wireless communication method, characterized in that the Bluetooth low energy communication unit included in the second wireless communication unit.
In the method for performing wireless charging using a contactless short-range wireless communication method in the power receiver,
Determining whether a level of a battery mounted in the power receiver is greater than or equal to a threshold;
Receiving data required for contactless short-range wireless communication from a first memory in an application processor when the battery level is greater than or equal to a threshold;
Receiving data required for contactless short range wireless communication from a second memory in the contactless short range wireless communication unit when the battery level is lower than a threshold;
And performing a wireless charging using a contactless short-range wireless communication method in the power receiver, comprising transmitting a report on a power reception state to the power transmitter through the contactless short-range wireless communication in response to the power transmission from the power transmitter. How to.
The data of claim 13, wherein the data required for the contactless short-range wireless communication provided from the first memory in the application processor includes:
A method for performing wireless charging using a contactless short range wireless communication method in a power receiver characterized in that the Bluetooth profile and Bluetooth low energy profile.
The method of claim 13, wherein the data required for the contactless short-range wireless communication provided from the second memory in the contactless short-range wireless communication unit,
A method for performing wireless charging using a contactless short range wireless communication method in a power receiver, characterized in that the WPT (WPT) -related profile and Bluetooth low energy profile.
The method of claim 13,
Activating the application processor when the battery level is greater than or equal to a threshold, and deactivating the application processor when the battery level is less than or equal to a threshold. How to perform wireless charging.
The method of claim 16,
Informing the power transmitter that the non-contact short range wireless communication unit is to be reset when the application processor is activated as the battery level is lower than the threshold but above the threshold;
The contactless short-range wireless communication unit after the reset receives the data necessary for the contactless short-range wireless communication from the first memory in the application processor to resume communication with the power transmitter, characterized in that the contactless in the power receiver A method of performing wireless charging using a near field communication method.

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