TW201603515A - Near field communication and wireless charging device and switching method using the same - Google Patents

Abstract

A near field communication and wireless charging device includes a coil, a tuning module, a near field communication module, a wireless charging module, and an energy storage device. The coil is configured for receiving electromagnetic waves. The tuning module is electrically connected to the coil. The near field communication module includes an attenuator and a near field communication control circuit. The attenuator is configured to attenuate the energy of electromagnetic waves transmitted from the tuning module. The near field communication control circuit is electrically connected to the attenuator. The energy storage device is electrically connected to the wireless charging module. Electromagnetic waves are able to be magnetically coupled to the coil, such that the coil transfers the signals of the electromagnetic waves to the near field communication module through the tuning module, or transfers the energy of the electromagnetic waves to the energy storage device through the tuning module and the wireless charging module.

Description

Near field communication and wireless charging device and switching method thereof

The invention relates to a near field communication and wireless charging device.

With the development of wireless transmission technology, more and more portable (such as handheld or wearable) electronic products have wireless transmission capabilities. The wireless transmission technology replaces the traditional connection line, and the antenna transmits and receives electromagnetic waves, so that the electronic product can transmit signals or energy without substantial contact with the transmission source.

Among them, Wireless Charging technology and Near Field Communication technology are the main wireless transmission technologies, and basically need their respective antennas to transmit and receive electromagnetic waves. The wireless charging system receives electromagnetic waves to achieve the charging effect, while the near field communication performs signal transmission and reception by coupling electromagnetic waves. Although the wireless transmission technology improves the convenience of operation, the space of the general portable electronic product is limited, and the excessive wireless transmission module and its corresponding antenna will complicate the assembly, which will not only hinder the portable electronic product. Miniaturization and may reduce the performance of portable electronic products.

One aspect of the present invention provides a near field communication and wireless charging device, including a coil, a frequency modulation module, a near field communication module, a wireless charging module, and a power storage device. The coil is used to receive electromagnetic waves. The FM module is electrically connected to the coil. The near field communication module includes an attenuator and a near field communication control circuit. The attenuator is used to attenuate the energy of electromagnetic waves from the FM module. The near field communication control circuit is electrically connected to the attenuator. The power storage device is electrically connected to the wireless charging module. The electromagnetic wave can be magnetically coupled with the coil, whereby the coil transmits the electromagnetic wave signal to the near field communication module via the frequency modulation module, or transmits the energy of the electromagnetic wave to the power storage device via the frequency modulation module and the wireless charging module.

In one or more embodiments, the wireless charging module includes a rectifier and a power management chip. The rectifier is used to rectify electromagnetic waves into direct current. The power management chip is used to transfer DC power to the power storage device and manage energy transfer of the power storage device.

In one or more embodiments, the wireless charging module further includes a switch electrically connected to the rectifier and the power management chip. The switch has a power threshold. When the power of the direct current is greater than the power threshold, the rectifier and the power management chip are turned on. When the power of the direct current is less than the power threshold, the switch is open.

In one or more embodiments, the switch is a single pole single throw switch.

In one or more embodiments, the wireless charging module further includes a voltage converter for adjusting the voltage of the direct current.

In one or more embodiments, the wireless charging module further includes a transmission transceiver electrically connected to the voltage converter for communicating with the transmission source. And depending on the result of communication with the transmission source, it is determined whether to drive the voltage converter.

In one or more embodiments, the wireless charging module includes a matching circuit for matching the impedance between the coil and the transmission source.

In one or more embodiments, the near field communication module further includes a matching circuit for matching the impedance between the coil and the transmission source.

In one or more embodiments, the near field communication and wireless charging device further includes a switch electrically connected to the FM module, the near field communication module, and the wireless charging module.

In one or more embodiments, the near field communication and wireless charging device further includes a frequency detector and a control unit. The frequency detector is electrically connected to the switch. The frequency detector is used to detect the operating frequency of electromagnetic waves. The control unit is electrically connected to the frequency detector and the switch. The control unit is configured to receive the operating frequency detected by the frequency detector, and control the switch according to the operating frequency, so that the switch turns on the FM module and the near field communication module, or turns on the FM module and the wireless charging module.

In one or more embodiments, the FM module includes a first frequency modulation component and a second frequency modulation component. The first frequency modulation component is electrically connected to the near field communication module and the coil. The second frequency modulation component is electrically connected to the wireless charging module and the coil, wherein the capacitance value of the first frequency modulation component is smaller than the capacitance value of the second frequency modulation component.

In one or more embodiments, the FM module is a variable capacitor.

In one or more embodiments, the coil surround defines a through hole, and the near field communication module, the wireless charging module and the power storage device form a metal region, and the metal region is disposed in the through hole.

In one or more embodiments, the cross-sectional area of the through hole changes along the axial direction of the through hole.

In one or more embodiments, the near field communication and wireless charging device further includes a first shielding layer disposed between the metal region and the coil.

In one or more embodiments, the near field communication and wireless charging device further includes a housing disposed around the coil.

In one or more embodiments, when the outer casing is made of a metal material, the near field communication and wireless charging device further includes a second shielding layer disposed between the outer casing and the coil.

In one or more embodiments, the first obscuring layer can serve as a carrier for the coil.

In one or more embodiments, the outer casing can serve as a carrier for the coil.

In one or more embodiments, the second shielding layer can serve as a carrier for the coil.

In one or more embodiments, the near field communication and wireless charging device further includes a wearable structure, so that the user can wear the near field communication and the wireless charging device by the wearable structure, wherein the coil is placed in the near field communication and wireless. The body of the charging device is away from the surface of the user.

Another aspect of the present invention provides a method for switching between near field communication and wireless charging, including detecting an operating frequency of electromagnetic waves received by a coil. The near field communication mode or the wireless charging mode is selected according to the operating frequency. If the near field communication mode is selected, the energy of the electromagnetic wave is attenuated and the information of the electromagnetic wave is processed. If the wireless charging mode is selected, the energy of the electromagnetic wave is transmitted to the power storage device.

In one or more embodiments, selecting the near field communication mode includes transmitting a confirmation with the transmission source. If the confirmation is YES, the signal of the electromagnetic wave is processed, and if it is confirmed to be no, the signal of the electromagnetic wave is stopped.

In one or more embodiments, selecting the wireless charging mode includes transmitting a confirmation with the transmission source. If it is confirmed to be YES, the energy of the electromagnetic wave is transmitted to the power storage device, and if the determination is NO, the energy of the electromagnetic wave is stopped to the power storage device.

The near field communication and wireless charging device of the above embodiment can achieve the functions of near field communication and wireless charging by a single coil, thereby greatly reducing the overall thickness of the near field communication and wireless charging device and reducing the design complexity.

110‧‧‧ coil

120‧‧‧FM Module

124‧‧‧Second frequency modulation component

132‧‧‧Attenuator

136, 146‧‧‧ matching circuit

142‧‧‧Rectifier

144‧‧‧Power Management Wafer

149‧‧‧Transmission transceiver

160‧‧‧Control unit

190‧‧‧ circuit board

220‧‧‧First shielding layer

240‧‧‧second shielding layer

246‧‧‧ body

112‧‧‧through hole

122‧‧‧First frequency modulation component

130‧‧‧ Near Field Communication Module

134‧‧‧ Near Field Communication Control Circuit

140‧‧‧Wireless charging module

143, 170‧‧ ‧ switch

148‧‧‧Voltage Converter

150‧‧‧Power storage device

180‧‧‧frequency detector

210‧‧‧Metal area

230‧‧‧ Shell

248‧‧‧Information display area

252‧‧‧ surface

250‧‧‧ Wearable structure

900‧‧‧Wireless charging source

H1, H2‧‧‧ height

P1, P2, P3‧‧‧ position

W1, W2‧‧‧ width

S910, S920, S930, S932, S934, S936, S940, S942, S944, S946‧‧

A‧‧‧Axial

L1, L2‧‧‧ length

U‧‧‧Users

FIG. 1 is a functional block diagram of a near field communication and wireless charging device according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of a near field communication and wireless charging device according to another embodiment of the present invention.

FIG. 3 is a flowchart of a method for switching a near field communication and a wireless charging device according to an embodiment of the present invention.

4 is a flow chart of a method for switching a near field communication and a wireless charging device according to another embodiment of the present invention.

FIG. 5A is a perspective view of a near field communication and wireless charging device according to an embodiment of the present invention.

Figure 5B is an exploded view of the near field communication and wireless charging device of Figure 5A.

Figure 6 is a top view of the wireless charging source.

7A and 7B are perspective views of coils according to another embodiment of the present invention.

FIG. 8 is a schematic diagram of a near field communication and wireless charging device and a user according to another embodiment of the present invention.

The embodiments of the present invention are disclosed in the following drawings, and for the purpose of clarity However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

FIG. 1 is a functional block diagram of a near field communication and wireless charging device according to an embodiment of the present invention. Near field communication and wireless charging device, such as mobile phone, smart watch or portable device with communication function, which at least comprises coil 110, FM module 120, near field communication module 130, wireless charging module 140, and storage battery Device 150, display element, central processing unit, touch input element, and the like. The coil 110 is for receiving electromagnetic waves. The FM module 120 (for example, composed of a capacitor) is electrically connected to the coil 110. The near field communication module 130 includes an attenuator 132 and a near field communication control circuit 134. The attenuator 132 is configured to attenuate the energy of the electromagnetic wave transmitted from the FM module 120. Near field communication control circuit 134 is electrically connected to the attenuator 132. The power storage device 150 is electrically connected to the wireless charging module 140. The electromagnetic wave can be magnetically coupled to the coil 110, whereby the coil 110 transmits the signal of the electromagnetic wave to the near field communication module 130 via the FM module 120, or transmits the energy of the electromagnetic wave to the storage battery via the FM module 120 and the wireless charging module 140. Device 150. It can be understood that in the present embodiment, the near field communication module 130 and the wireless charging module 140 share the two ends of the coil 110.

In short, the near field communication and wireless charging device of the embodiment can The function of near field communication and wireless charging can be achieved by a single coil 110, thereby greatly reducing the overall thickness of the near field communication and wireless charging device and reducing the design complexity. Specifically, since the near field communication and the wireless charging are both required to be coupled to the electromagnetic wave by the coil 110, the near field communication and the wireless charging in the present embodiment may use a single coil 110, and then use the frequency modulation module 120 to change the coil. The coupling frequency of 110. The electromagnetic waves can be transmitted to the near field communication module 130 or the wireless charging module 140 according to different coupling frequencies. If the electromagnetic wave signal is transmitted to the near field communication module 130 via the coil 110 and the FM module 120, the attenuator 132 of the near field communication module 130 can attenuate the energy of the electromagnetic wave (that is, reduce the quality factor of the magnetic coupling (Quality Factor). )) to avoid signal distortion caused by the energy saturation of electromagnetic waves. The attenuated signal is passed to the near field communication control circuit 134 for signal processing of the near field communication.

In this embodiment, the FM module 120 includes a first frequency modulation component. 122 and second frequency modulation component 124. The first frequency modulation component 122 is electrically connected to the near field communication module 130 and the coil 110. The second frequency modulation component 124 is electrically connected to The wireless charging module 140 and the coil 110. The capacitance value of the first frequency modulation component 122 is smaller than the capacitance value of the second frequency modulation component 124. In detail, both the first frequency modulation component 122 and the second frequency modulation component 124 can be capacitors. The first frequency modulation component 122 and the coil 110 can form a first coupling frequency, and the second frequency modulation component 124 and the coil 110 can form a second coupling frequency, the first coupling frequency being different from the second coupling frequency. In this way, when the operating frequency of the electromagnetic wave is the first coupling frequency, the electromagnetic wave is transmitted to the near field communication module 130, and when the operating frequency of the electromagnetic wave is the second coupling frequency, the electromagnetic wave is transmitted to the wireless charging module 140. Since the capacitance value of the first frequency modulation component 122 is smaller than the capacitance value of the second frequency modulation component 124, the first coupling frequency is higher than the second coupling frequency.

For example, the first coupling frequency is 13.56 MHz, and the second coupling The combined frequency is 6.78MHz (this is the magnetic resonance frequency developed by the Alliance for Wireless Power (A4WP)). If the operating frequency of the electromagnetic wave is about 13.56 MHz, the electromagnetic wave can be magnetically coupled with the coil 110 and the first frequency modulation element 122, so that the electromagnetic wave can be transmitted to the near field communication module 130 via the first frequency modulation element 122. If the operating frequency of the electromagnetic wave is about 6.78 MHz, the electromagnetic wave can be magnetically coupled to the coil 110 and the second frequency modulation element 124 so that the electromagnetic wave can be transmitted to the wireless charging module 140 via the second frequency modulation element 124. In this way, through the combination of the coil 110 and the FM module 120, the near field communication and wireless charging device of the present embodiment can achieve the functions of near field communication and wireless charging. In addition, in the present embodiment, the first coupling frequency is a multiple of the second coupling frequency, so that the effective electrical length of the coil 110 itself can transmit and receive the second coupling frequency, and the special coupling can be performed without special design. Send and receive the first coupling frequency Rate with the second coupling frequency.

In this embodiment, the wireless charging module 140 includes a rectifier. 142 and power management chip 144. The rectifier 142 is for rectifying electromagnetic waves into direct current. The power management chip 144 is used to transfer DC power to the power storage device 150 and manage energy transfer of the power storage device 150. In detail, when the coupling frequency of the coil 110 is the second coupling frequency, the induced current generated by the coil 110 is transmitted to the rectifier 142, and thus the rectifier 142 rectifies the induced current to direct current. Then, the power management chip 144 transfers the DC power to the power storage device 150, so that the charging process of the wireless charging module 140 is completed. It is worth mentioning that when the near field communication and the wireless charging device need to use energy, the power management chip 144 can extract energy from the power storage device 150 for use by other components, so the power management chip 144 has the management of the power storage device 150. Energy transfer can also have the function of preventing overcharging. In other embodiments, the DC power outputted by the power management chip 144 may be stored in a power storage device (not shown) before being transferred to the power storage device 150. Instructing to transfer the energy of the storage temporary storage device to the power storage device 150 to complete the charging process, wherein the storage temporary storage device may be located inside or outside the wireless charging module 140, and the storage temporary storage device is electrically Connected between the power management chip 144 and the power storage device 150.

In addition, in the embodiment, the wireless charging module 140 further includes The switch 143 is electrically connected to the rectifier 142 and the power management chip 144. Switch 143 has a power threshold. When the power of the direct current is greater than the power threshold, the rectifier 142 and the power management chip 144 are turned on, when the power of the direct current is less than For the power threshold, the switch 143 is open. In general, the power threshold is set to be greater than the peak value of the near field communication signal, so that the energy of the electromagnetic wave can be prevented from leaking to the power storage device 150 in the non-wireless charging operation mode. On the other hand, at the moment of wireless charging, the power of the direct current is greater than the power threshold of the switch 143, so the rectifier 142 and the power management wafer 144 can be turned on, so that the energy of the electromagnetic wave can be transmitted to the power storage device 150. In one or more embodiments, the switch 143 is, for example, a Single-Pole Single Throw (SPST) switch, but the invention is not limited thereto.

In this embodiment, the wireless charging module 140 further includes a matching circuit 146 for matching the impedance between the coil 110 and a transmission source (not shown), wherein the transmission source is used to provide electromagnetic waves for wireless charging. Therefore, when the transmission source transmits the electromagnetic wave to the coil 110, the matching circuit 146 can match the impedance between the transmission source and the coil 110, and can also finely adjust the second coupling frequency, so that the electromagnetic wave and the coil 110 have better magnetic coupling, so as to facilitate the magnetic coupling. Energy reception by the wireless charging module 140.

On the other hand, the near field communication module 130 can further include a matching circuit. 136, used to match the impedance between the coil 110 and another transmission source (not shown), wherein the transmission source is used to provide electromagnetic waves for near field communication. Therefore, when the transmission source transmits the electromagnetic wave to the coil 110, the matching circuit 136 can match the impedance between the transmission source and the coil 110, and can also finely adjust the first coupling frequency, so that the electromagnetic wave and the coil 110 have better magnetic coupling, so as to facilitate the magnetic coupling. The signal reception of the near field communication module 130. It should be noted that although in the present embodiment, the matching circuit 136 is electrically connected to the first frequency modulation component 122 and the attenuator 132, In other embodiments, the matching circuit 136 can also be electrically connected to the attenuator 132 and the near field communication control circuit 134. The invention is not limited thereto.

In one or more embodiments, near field communication and wireless charging device The control unit 160 is further included, and is electrically connected to the power management chip 144 and the near field communication control circuit 134. The control unit 160 (for example, a central processing unit) can process the information of the near field communication module 130 and the wireless charging module 140, and can also integrate the near field communication module 130 and the wireless charging module 140. For example, the signal processed by the near field communication module 130 can be transmitted to the control unit 160 to perform a corresponding action. In addition, when the near field communication and wireless charging device is in a specific environment, when it wants to use the mobile charging function of the mobile payment, the near field communication and the near charging source of the wireless charging device and the wireless charging source can be used for near field communication. After performing the debit payment or identity confirmation, the near field communication module 130 transmits its payment or identity confirmation signal to the control unit 160, so the control unit 160 can drive the power management chip 144 to receive the electromagnetic wave of the wireless charging source. Perform a wireless charging job.

In other implementations, the control unit 160 can also be electrically connected. In the attenuator 132, to adjust the degree of energy attenuation of the electromagnetic wave, for example, the control unit 160 can determine the degree of attenuation of the attenuator 132 according to the signal strength received by the near field communication control circuit 134, but the invention is not limited thereto. In other words, the attenuator 132 is an adjustable attenuator, and the adjustable attenuator can be composed of a single circuit or a combination of a plurality of adjustable elements.

Next, please refer to FIG. 2, which is a near embodiment of the present invention. The functional block diagram of the field communication and wireless charging device, in which some of the components are the same as those of the first figure, so the symbol of Fig. 1 is used. In this embodiment In the formula, the near field communication and wireless charging device further includes a switch 170 and a frequency detector 180. The switch 170 is electrically connected to the FM module 120, the near field communication module 130, the wireless charging module 140, and the frequency detector 180. The frequency detector 180 is used to detect the operating frequency of the electromagnetic wave. The control unit 160 is electrically connected to the frequency detector 180 and the switch 170. The control unit 160 is configured to receive the frequency detected by the frequency detector 180, and control the switch 170 according to the frequency, so that the switch 170 selectively turns on the FM module 120 and the near field communication module 130, or turns on the FM module. 120 and wireless charging module 140. The control unit 160 is also electrically connected to the transmission transceiver 149.

In operation, please refer to Figure 2 and Figure 3 together, the third of which The figure is a flowchart of a method for switching a near field communication and a wireless charging device according to an embodiment of the present invention, and is described here in conjunction with the near field communication and wireless charging device of FIG. First, as shown in step S910, the operating frequency of the electromagnetic wave received by the coil 110 is detected. In detail, the initial setting of the switch 170 is first switched to the frequency detector 180, and then based on the operating frequency detected by the frequency detector 180, to turn on the FM module 120 and the frequency detector 180. The FM module 120 and the near field communication module 130 and the FM module 120 and the wireless charging module 140 are both in an open state. Therefore, the electromagnetic waves received by the coil 110 can be transmitted to the frequency detector 180 via the switch 170. The frequency detector 180 transmits the detected result to the control unit 160 for analysis by the control unit 160.

Then, as shown in step S920, according to the detected operating frequency Switching of switch 170 is performed to determine the near field communication mode or the wireless charging mode. In detail, the control unit 160 may first determine the detected The frequency value, if the frequency value is 13.56 MHz, selects the near field communication mode, as shown in step S930. The control unit 160 controls the switch 170 to switch to the near field communication module 130 so that electromagnetic waves can be transmitted to the near field communication module 130 via the switch 170. After the attenuator 132 attenuates the energy of the electromagnetic wave, the near field communication control circuit 134 processes the information of the electromagnetic wave. Regardless of whether the near field communication mode or the wireless charging mode is performed, once any mode is completed, the state of the switch 170 and the frequency detector 180 path is restored.

On the other hand, please return to step S920 if the frequency value is 6.78. At MHz, the wireless charging mode is selected, as shown in step S940. The control unit 160 controls the switch 170 to switch to the wireless charging module 140, so electromagnetic waves can be transmitted to the wireless charging module 140 via the switch 170. The energy of the electromagnetic waves can then be transferred to the electrical storage device 150. In this way, the near field communication mode or the wireless charging mode can be selected based on the detected operating frequency of the electromagnetic wave, so that the user does not have to manually instruct the near field communication and the wireless charging device to select which mode, so Increase the ease of use of near field communication and wireless charging devices.

Then return to Figure 2. In this embodiment, the frequency modulation module 120 is a variable capacitor, and the control unit 160 is more electrically connected to the FM module 120. Therefore, after the control unit 160 selects the near field communication mode or the wireless charging mode, the control unit 160 can dynamically adjust the capacitance value of the frequency modulation module 120, thereby changing the coupling frequency of the coil 110 to increase the relationship between the coil 110 and the electromagnetic wave. Magnetic coupling. The variable capacitor may be composed of a single circuit or a combination of a plurality of adjustable components (for example, a capacitor and/or an inductor).

In this embodiment, the wireless charging module 140 further includes a voltage conversion. The converter 148 is electrically connected to the rectifier 142 and the power management chip 144, and the voltage converter 148 is used to adjust the voltage of the direct current. In some embodiments, if the voltage of the rectified DC power of the rectifier 142 does not meet the voltage required by the power storage device 150, direct entry of the DC power into the power storage device 150 may cause damage to the power storage device 150. The voltage converter 148 can first adjust the voltage of the direct current to the voltage required by the power storage device 150, then enter the power management chip 144, and then store the power to the power storage device 150. On the other hand, it should be noted that, in the present embodiment, when the near field communication and the wireless charging device are in the near field communication mode, the FM module 120 and the wireless charging module 140 are disconnected, so the wireless charging mode is Group 140 may not need to be added to switch 143 (as shown in Figure 1).

Based on the action of the control unit 160, in the present embodiment, the wireless charging module 140 further includes a transmission transceiver 149 electrically connected to the voltage converter 148 for communicating with the transmission source to confirm the transmission agreement between each other, and Whether or not to drive the voltage converter 148 is determined based on the result of communication with the transmission source. If the transmission agreement between the two is the same, the voltage converter 148 is driven to achieve the power storage effect. The transmission transceiver 149 is, for example, a Bluetooth device, but the invention is not limited thereto.

In operation, please refer to FIG. 2 and FIG. 4 together, wherein FIG. 4 is a flowchart of a method for switching a near field communication and a wireless charging device according to another embodiment of the present invention, wherein part of the steps and FIG. 3 The steps are the same, so the symbol of Figure 3 is used. As shown in step S942, the transmission transceiver 149 confirms the transmission agreement with the transmission source if the transmission source is a wireless charging source. In detail, when the frequency detector 180 detects the wireless charging power After the operating frequency of the magnetic wave (for example, 6.78 MHz), the control unit 160 switches the switch 170 to turn on the FM module 120 and the wireless charging module 140. The transmission transceiver 149 then initiates a transmission confirmation with the wireless charging source to confirm that the electromagnetic waves detected by the frequency detector 180 are provided by the wireless charging source, rather than the noise of other frequencies in the air. If YES is confirmed, the energy of the electromagnetic wave is transmitted to the power storage device 150. For example, as shown in step S944, the transmission transceiver 149 drives the voltage converter 148 to pass the energy of the electromagnetic wave to the power storage device 150 through the voltage converter 148. However, if the determination is negative, the energy of the electromagnetic wave is stopped to be transferred to the power storage device 150. For example, as shown in step S946, for example, the transmission transceiver 149 stops driving the voltage converter 148, so that an open circuit is formed between the rectifier 142 and the power management wafer 144. In this way, electromagnetic waves of unknown origin can be prevented from charging the power storage device 150.

On the other hand, the near field communication mode can also join the transmission agreement. Confirm the steps. Please continue to refer to Figures 2 and 4. As shown in step S932, transmission confirmation is performed with another transmission transceiver (not shown) and the transmission source if the transmission source is a near field communication source. In detail, after the frequency detector 180 detects the operating frequency of the electromagnetic wave of the near field communication (for example, 13.56 MHz), the control unit 160 switches the switch 170 to turn on the FM module 120 and the near field communication module 130. The near field communication control circuit 134 then initiates a transmission agreement with the near field communication source to confirm whether the electromagnetic wave detected by the frequency detector 180 is provided by the near field communication source. Taking the mobile payment function as an example, the near field communication control circuit 134 may include a secure payment element (Secure Element). The mobile payment security component can communicate with the near field communication source to confirm the transmission agreement and identity, such as confirming whether the mobile payment security component performs the payment. program. If the answer is YES, the information of the electromagnetic wave is processed. For example, as shown in step S934, for example, the near field communication control circuit 134 starts receiving the signal of the electromagnetic wave. If the confirmation is NO, the processing of the electromagnetic wave information is stopped. For example, as shown in step S936, for example, the near field communication control circuit 134 stops receiving the signal of the electromagnetic wave. In this way, it is possible to prevent receiving signals of electromagnetic waves of unknown origin. As described above, whether or not the electromagnetic wave energy is transmitted or the electromagnetic wave information is processed, once any step is completed, the state of the switch 170 and the frequency detector 180 path is restored.

Please refer to FIG. 5A and FIG. 5B together, wherein FIG. 5A is a perspective view of a near field communication and wireless charging device according to an embodiment of the present invention, and FIG. 5B is a near field communication and wireless charging device of FIG. 5A. Explosion map. In the present embodiment, the coil 110 is, for example, a loop having two ends, which define a through hole 112, and the near field communication module 130 and the wireless charging module 140 form a metal region with the power storage device 150. 210, and the metal area 210 is placed in the through hole 112, wherein the near field communication module 130, the wireless charging module 140 and the power storage device 150 can be placed on a circuit board 190, and the circuit board 190 can further include other Electronic components, however, the invention is not limited thereto. Specifically, since the space in the through hole 112 of the coil 110 can be used, the coil 110 itself hardly increases the volume of the entire device, contributing to miniaturization and thinning of the device. In addition, one end of the coil 110 can be connected to the frequency modulation module 120 and then connected to the circuit board 190, and the other end can be connected to the circuit board 190. It will be understood by those skilled in the art that the related components of the near field communication and wireless charging device disclosed in FIGS. 1 and 2 can be disposed in the through hole 112.

In one or more embodiments, near field communication and wireless charging device Other electronic components may be included, which are disposed on the circuit board 190 and occupy a specific area and form a specific volume. Understandably, the electronic components cause radiation effects and electromagnetic interference to the coil 110. In the present embodiment, based on the needs of the simulation test and the ease of explanation of the technical features in the present embodiment, the influence of the electronic components on the coil 110 is equivalent to the influence of the metal region 210 on the coil 110, and the metal region 210 is The near field communication module 130, the wireless charging module 140, the power storage device 150 and other electronic components are included. In addition, the near field communication and wireless charging device may further include a first shielding layer 220 disposed between the metal region 210 and the coil 110. The first shielding layer 220 can block the electromagnetic interference of the metal region 210 on the coil 110, and helps to increase the receiving distance of the electromagnetic wave of the coil 110 in the near field communication mode. The material of the first shielding layer 220 may be a ferrite material, but the invention is not limited thereto.

In one or more embodiments, near field communication and wireless charging device A housing 230 may also be included, disposed around the coil 110. The outer casing 230 can increase the overall aesthetics of the near field communication and wireless charging device. In addition, the near field communication and wireless charging device may further include a second shielding layer 240 disposed between the outer casing 230 and the coil 110. The function and material of the second shielding layer 240 can be the same as that of the first shielding layer 220, and therefore will not be described again. When the outer casing 230 is made of a metal material, the first shielding layer 220 or the second shielding layer 240 may be a carrier of the coil 110. When the outer casing 230 is made of a non-metal material, the first shielding layer 220 or the outer casing 230 may be the carrier of the coil 110.

Next, the metal region 210, the outer casing 230, and the A shielding layer 220 and a second shielding layer 240 affect the near field communication and the near field communication of the wireless charging device. In the present embodiment, the coil 110 has a length L1 = 37 mm, a width W1 = 43 mm, and a height H1 = 5 mm, and the metal region 210 has a length L2, a width W2, and a height H2. The following description is made with four metal regions 210: Sample 1: L2 = 30 mm, W2 = 30 mm, H2 = 5 mm, Sample 2: L2 = 30 mm, W2 = 30 mm, H2 = 10 mm, Sample 3: L2 = 30 mm, W2 = 40 mm, H2 = 5 mm, Sample 4: L2 = 34 mm, W2 = 40 mm, H2 = 5 mm.

Each of the near field communication and wireless charging devices of Table 1 does not include the outer casing 230, the first shielding layer 220 and the second shielding layer 240, and each of the near field communication and wireless charging devices of Table 2 does not include the outer casing 230 and the second shielding. The layer 240, and each of the near field communication and wireless charging devices of Table 3 includes a metal region 210, a casing 230 (made of metal), a first shielding layer 220 and a second shielding layer 240. As can be seen from Tables 1 to 3, the near field communication and wireless charging device with the metal region 210 has a larger capacitance value of the first frequency modulation component 122 (as shown in FIG. 1) and a shorter near field communication distance, but still Within acceptable values. When the first shielding layer 220 is added, the capacitance value of the first frequency modulation component 122 of the near field communication and wireless charging device with the metal region 210 can be greatly reduced, and the near field communication distance can be significantly improved. In addition, when the outer casing 230 and the second shielding layer 240 are further added, the capacitance value of the first frequency modulation component 122 and the near field communication distance are also within an acceptable numerical range.

In summary, the other electronic components, namely the metal region 210, have an effect on the near field communication of the near field communication and the wireless charging device; after further adding the first shielding layer 220, the metal region 210 can be lowered for the coil 110. After the metal casing 230 and the second shielding layer 240 are further added, the capacitance value of the first frequency adjusting component 122 and the near field communication distance are also within an acceptable numerical range. In other words, increase the overall Under beautiful conditions, the near field communication and wireless charging device can still achieve the function of near field communication.

Next, the effect of the metal region 210 on the wireless charging of the near field communication and wireless charging device will be explained by experimental results. Please refer to FIG. 6, which is a top view of a wireless charging source 900. In the present embodiment, the coil 110 has a length L1 = 37 mm, a width W1 = 43 mm, and a height H1 = 5 mm, and the metal region 210 has a length L2 = 30 mm, a width W2 = 30 mm, and a height H2 = 5 mm. If the near field communication and wireless charging device are respectively placed at different positions P1, P2 and P3 of the wireless charging source 900, they can be wirelessly charged. The wireless charging source 900 uses a wireless charging alliance (A4WP) Class 3 charging pad (Charging Mat).

Wireless charging data

The load of Table 4 and Table 5 is the load of near field communication and wireless charging device. It can be seen from Table 4 and Table 5 that there is not much difference between the charging power (P=I*V) of the near field communication and wireless charging device with/without metal area 210 (the near field with the metal area 210) The charging power of the communication and wireless charging device can reach 0.7W~2.8W), that is, the electronic components in the near field communication and wireless charging device, and will not seriously affect the wireless charging function.

Next, please refer to FIGS. 7A and 7B, which are perspective views of a coil 110 according to another embodiment of the present invention. The difference between the second embodiment and the embodiment of FIG. 5B lies in the shape of the coil 110. In the second embodiment, the cross-sectional area of the through hole 112 of the coil 110 changes along the axial direction A of the through hole 112. For example, in FIG. 7A, the cross-sectional area of the through hole 112 becomes larger along the axial direction A of the through hole 112. For example, in FIG. 7B, the sectional area of the through hole 112 becomes smaller along the axial direction A of the through hole 112. However, the invention is not limited thereto. Basically, the outer shape of the coil 110 can be correspondingly changed according to the volume occupied by the metal region 210. Therefore, the cross-sectional area of the through hole 112 can be circular, square or polygonal, and the through hole 112 can be cylindrical or platform-shaped. , cone or other suitable shape.

Next, please refer to FIG. 8 , which is a schematic diagram of a near field communication and wireless charging device and a user U according to another embodiment of the present invention. The difference between this embodiment and the embodiment of FIG. 5A lies in the arrangement and shape of the coil 110 and the addition of the wearable structure 250. In this embodiment, the near field communication and wireless charging device further includes a wearable structure 250, so that the user U can The near field communication and wireless charging device is worn by the wearable structure 250, wherein the coil 110 is disposed on the surface 252 of the body 246 of the near field communication and wireless charging device to be away from the user U. Specifically, in the present embodiment, the near field communication and wireless charging device may be a wrist-worn communication device, and the wearable structure 250 is a wristband, wherein the body 246 and the wearable structure 250 may be an integrally formed structure or It is a separable structure. Since the coil 110 is placed on the surface 252, when the near field communication and the wireless charging device need to perform near field communication, the surface 252 only needs to be close to the transmission source, so the near field communication and the wireless charging device need not be removed, so the number is greatly increased. The convenience of near field communication. In addition, the coil 110 of the present embodiment is placed on the surface 252, that is, a two-dimensional coil, so that it must occupy a larger surface area 252 at the same operating frequency, and the information display area of the near field communication and wireless charging device is enabled. The 248 becomes smaller, but the thickness of the overall device can be reduced. The other components of the near field communication and wireless charging device (such as the FM module 120, the near field communication module 130, the wireless charging module 140, and the power storage device 150, etc.) can be placed under the coil 110, that is, the outer casing 230. (as shown in Figure 5B).

Please also refer to Figures 5B and 8 together. It is worth mentioning that, Although the embodiment of FIG. 8 is exemplified by a near field communication and wireless charging device having a two-dimensional coil, in other embodiments, the near field communication and wireless charging device of FIG. 5B may further include a wearable structure 250. The user U can wear the near field communication and wireless charging device by the wearable structure 250. Since the coil 110 of FIG. 5B is a three-dimensional coil, it does not need to occupy any surface 252 area at the same operating frequency, and the information display area 248 of the near field communication and wireless charging device becomes larger. Because it will coil 110 It is disposed in the existing outer casing 230, so it is not necessary to increase the thickness of the whole device. When the near field communication and the wireless charging device need to perform near field communication, the near field communication and the wireless charging device are not required to be removed, so the number can be greatly increased. The convenience of near field communication.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

110‧‧‧ coil

120‧‧‧FM Module

122‧‧‧First frequency modulation component

124‧‧‧Second frequency modulation component

130‧‧‧ Near Field Communication Module

132‧‧‧Attenuator

134‧‧‧ Near Field Communication Control Circuit

136, 146‧‧‧ matching circuit

140‧‧‧Wireless charging module

142‧‧‧Rectifier

143‧‧‧ switch

144‧‧‧Power Management Wafer

150‧‧‧Power storage device

160‧‧‧Control unit

Claims (24)

A near field communication and wireless charging device comprises: a coil for receiving an electromagnetic wave; a frequency modulation module electrically connected to the coil; and a near field communication module comprising: an attenuator for attenuating The energy of the electromagnetic wave transmitted from the FM module; and a near field communication control circuit electrically connected to the attenuator; a wireless charging module; and a power storage device electrically connected to the wireless charging module, wherein The electromagnetic wave can be magnetically coupled to the coil, and the coil transmits the signal of the electromagnetic wave to the near field communication module via the frequency modulation module, or the energy of the electromagnetic wave is transmitted to the wireless charging module via the frequency modulation module Transfer to the power storage device. The near field communication and wireless charging device of claim 1, wherein the wireless charging module comprises: a rectifier for rectifying the electromagnetic wave to be continuously flowing; and a power management chip for transmitting the direct current to the The power storage device manages energy transfer of the power storage device. The near field communication and wireless charging device of claim 2, wherein the wireless charging module further comprises: a switch electrically connected to the rectifier and the power management chip, The switch has a power threshold. When the power of the direct current is greater than the power threshold, the rectifier and the power management chip are turned on. When the power of the direct current is less than the power threshold, the switch is open. The near field communication and wireless charging device of claim 3, wherein the switch is a single pole single throw switch. The near field communication and wireless charging device of claim 2, wherein the wireless charging module further comprises: a voltage converter for adjusting the voltage of the direct current. The near field communication and wireless charging device of claim 5, wherein the wireless charging module further comprises: a transmission transceiver electrically connected to the voltage converter for communicating with a transmission source, and according to The communication result of the transmission source determines whether to drive the voltage converter. The near field communication and wireless charging device of claim 1, wherein the wireless charging module comprises: a matching circuit for matching an impedance between the coil and a transmission source. The near field communication and wireless charging device of claim 1, wherein the near field communication module further comprises: a matching circuit for matching an impedance between the coil and a transmission source. The near field communication and wireless charging device of claim 1, further comprising: a switch electrically connected to the FM module, the near field communication module and the wireless charging module. The near field communication and wireless charging device of claim 9, further comprising: a frequency detector electrically connected to the switch, the frequency detector for detecting an operating frequency of the electromagnetic wave; and a control unit, Electrically connected to the frequency detector and the switch, the control unit is configured to receive the operating frequency detected by the frequency detector, and control the switch according to the frequency, so that the switch turns on the FM module and The near field communication module or the FM module and the wireless charging module are turned on. The near field communication and wireless charging device of claim 1, wherein the frequency modulation module comprises: a first frequency modulation component electrically connected to the near field communication module and the coil; and a second frequency modulation component, The connection is performed between the wireless charging module and the coil, wherein a capacitance value of the first frequency modulation component is smaller than a capacitance value of the second frequency modulation component. The near field communication and wireless charging device according to claim 1 The FM module is a variable capacitor. The near field communication and wireless charging device of claim 1, wherein the coil surround defines a through hole, the near field communication module, the wireless charging module and the power storage device form a metal area, and the metal area Placed in the through hole. The near field communication and wireless charging device of claim 13, wherein the cross-sectional area of the through hole changes along an axial direction of the through hole. The near field communication and wireless charging device of claim 13, further comprising: a first shielding layer disposed between the metal region and the coil. The near field communication and wireless charging device of claim 14, further comprising: a casing disposed around the coil. The near field communication and wireless charging device of claim 16, when the outer casing is made of a metal material, further comprising: a second shielding layer disposed between the outer casing and the coil. The near field communication and wireless charging device of claim 15, wherein the first shielding layer is a carrier of the coil. The near field communication and wireless charging device of claim 16, wherein the outer casing is a carrier of the coil. The near field communication and wireless charging device of claim 17, wherein the second shielding layer is a carrier of the coil. The near field communication and wireless charging device of claim 1, further comprising: a wearable structure, wherein a user can wear the near field communication and wireless charging device by the wearable structure, wherein the coil is placed The body of the near field communication and wireless charging device is away from the surface of one of the users. A method for switching between near field communication and wireless charging, comprising: detecting an operating frequency of an electromagnetic wave received by a coil; and selecting a near field communication mode or a wireless charging mode according to the operating frequency, wherein if the In the near field communication mode, the energy of the electromagnetic wave is attenuated and the information of the electromagnetic wave is processed. If the wireless charging mode is selected, the energy of the electromagnetic wave is transmitted to a power storage device. The switching method of claim 22, wherein the selecting the near field communication mode comprises: performing transmission confirmation with a transmission source, wherein if the confirmation is yes, processing the electromagnetic wave signal, and if the confirmation is no, stopping processing the electromagnetic wave Signal. The switching method of claim 22, wherein the selecting the wireless charging mode comprises: transmitting a confirmation with a transmission source, wherein if the confirmation is yes, transmitting the energy of the electromagnetic wave to the power storage device, if the confirmation is no, The energy of the electromagnetic wave is stopped to be delivered to the power storage device.