Wireless charging circuit and electronic equipment

Abstract

The utility model relates to a wireless charging circuit and electronic equipment. The wireless charging circuit comprises a charging coil module; the voltage output port is electrically connected with the charging coil module and is used for outputting voltage to the charging coil module, so that the charging coil module can transmit a charging signal; the switch module is connected to each connecting line between the charging coil module and the voltage output port and is used for switching the connecting lines between the two ends of the same charging coil in the charging coil module and the voltage output port to be in the on or off state at the same time; when the switch module is in different switch states, the charging coil module can emit different charging signals so as to wirelessly charge different devices to be charged. According to the embodiment of the invention, the cost of material devices for arranging the wireless charging circuit in the electronic equipment can be reduced, and the wiring area occupied by the wireless charging circuit in the electronic equipment is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of charging, and in particular to a wireless charging circuit and an electronic device. BACKGROUND

[0002] With the development of technology, electronic devices such as tablet computers are equipped with accessories such as keyboards and electronic styluses, and the keyboards and electronic styluses need to be powered or charged.

[0003] At present, in order to realize the integrity and aesthetics of the electronic device, the keyboard and the electronic stylus are usually charged in a wireless charging manner. However, the existing wireless charging of the keyboard and the electronic stylus needs to set two sets of wireless charging circuits in the tablet computer, the cost of the material devices is high, and the two sets of wireless charging circuits occupy a large area of the wire in the tablet. UTILITY MODEL CONTENT

[0004] In order to overcome the problems in the related art, the present disclosure provides a wireless charging circuit and an electronic device, which can reduce the cost of material devices for setting a wireless charging circuit in an electronic device, and reduce the area of wire occupied by the wireless charging circuit in the electronic device.

[0005] According to a first aspect of an embodiment of the present disclosure, a wireless charging circuit is provided, at least comprising:

[0006] a charging coil module;

[0007] a voltage output port electrically connected to the charging coil module, configured to output a voltage to the charging coil module, so that the charging coil module can emit a charging signal;

[0008] a switch module connected to each connection line between the charging coil module and the voltage output port, configured to switch the connection line between the two ends of the same charging coil in the charging coil module and the voltage output port to be in a conductive or disconnected state at the same time;

[0009] In the case that the switch module is in different switch states, the charging coil module can emit different charging signals to wirelessly charge different devices to be charged.

[0010] In some embodiments, the charging coil module includes a first coil and a second coil; and the switch module includes:

[0011] a first controlled switch, a first end of the first controlled switch being connected to the voltage output port, and a second end of the first controlled switch being connected to the first coil;

[0012] a second controlled switch, a first end of the second controlled switch being connected to the voltage output port, a second end of the second controlled switch being connected to the second coil;

[0013] wherein the device to be charged coupled with the first coil is different from the device to be charged coupled with the second coil.

[0014] In some embodiments, a second end of the first controlled switch is connected to a first end of the first coil, a third end of the first controlled switch is connected to a first end of the second coil;

[0015] a second end of the second controlled switch is connected to a second end of the second coil, a third end of the second controlled switch is connected to a second end of the first coil;

[0016] In some embodiments, the first coil is in operation when a first end of the first controlled switch and a second end of the first controlled switch are in an on state, and a first end of the second controlled switch and a third end of the second controlled switch are in an on state;

[0017] In some embodiments, the second coil is in operation when a first end of the first controlled switch and a third end of the first controlled switch are in an on state, and a first end of the second controlled switch and a second end of the second controlled switch are in an on state.

[0018] In some embodiments, the first controlled switch and the second controlled switch each comprise a field effect transistor.

[0019] In some embodiments, the charging coil module comprises a plurality of charging coils, and the switch module comprises a switch chip;

[0020] the switch chip, a first end of the switch chip being connected to the voltage output port, a plurality of second ends of the switch chip being respectively connected to each of the charging coils, for switching the voltage output port to be connected to different charging coils.

[0021] In some embodiments, the wireless charging circuit further comprises:

[0022] a boost module, electrically connected to the voltage output port, for boosting the voltage output by the voltage output port to obtain a direct current signal;

[0023] an inverter module, electrically connected to the boost module and the switch module, for inverting the direct current signal to an alternating current signal, and transmitting the alternating current signal to the charging coil module through the switch module.

[0024] In some embodiments, the wireless charging circuit further comprises:

[0025] A protection module, electrically connected between the voltage output port and the boost module, is used to disconnect the connection between the voltage output port and the boost module when the voltage output at the voltage output port is greater than a first preset voltage threshold, or when the voltage output at the voltage output port is less than a second preset voltage threshold.

[0026] Wherein, the first preset voltage threshold is greater than the second preset voltage threshold.

[0027] According to a second aspect of the present disclosure, an electronic device is provided, comprising at least:

[0028] The wireless charging circuit as described in the first aspect;

[0029] The control module, connected to the switch module of the wireless charging circuit, is used to control the switch module to be in different switching states so as to wirelessly charge different devices to be charged.

[0030] In some embodiments, the electronic device further includes:

[0031] The power module is electrically connected to the voltage output port of the wireless charging circuit and is used to provide voltage to the voltage output port.

[0032] In some embodiments, the first coil and the second coil of the wireless charging circuit are located on opposite sides of the electronic device.

[0033] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0034] This disclosure provides a wireless charging circuit, comprising: a charging coil module; a voltage output port electrically connected to the charging coil module for outputting voltage to the charging coil module, enabling the charging coil module to transmit a charging signal; and a switch module connected to each connection line between the charging coil module and the voltage output port for switching the connection lines between the two ends of the same charging coil in the charging coil module and the voltage output port to be simultaneously in a conducting or disconnected state; when the switch module is in different switching states, the charging coil module can transmit different charging signals to wirelessly charge different devices to be charged.

[0035] Thus, different from the related art that two sets of wireless charging circuits are used for wireless charging, the embodiment of the present disclosure can set a switch module between the voltage output port and the charging coil module, and by switching the switch module to be in different switch states, the charging coil module can emit different charging signals to perform wireless charging on different devices to be charged, so as to reduce the cost of material devices of setting the wireless charging circuit in the electronic device, and reduce the wiring area occupied by the wireless charging circuit in the electronic device. At the same time, the embodiment of the present disclosure can control the connection line between the two ends of the same charging coil in the charging coil module and the voltage output port to be in the conducting or open state at the same time by switching the switch state of the switch module, so that the charging coil module can emit the charging signal more accurately, so as to effectively improve the charging efficiency of wireless charging on the device to be charged.

[0036] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0038] Figure 1 is a structural diagram of a wireless charging circuit according to an exemplary embodiment Figure 1 .

[0039] Figure 2 is a structural diagram of a wireless charging circuit according to an exemplary embodiment Figure 2 .

[0040] Figure 3 is a structural diagram of a wireless charging circuit according to an exemplary embodiment Figure 3 .

[0041] Figure 4 is a structural diagram of a wireless charging circuit according to an exemplary embodiment Figure 4 .

[0042] Figure 5 is a structural diagram of an electronic device according to an exemplary embodiment.

[0043] Figure 6 is a structural diagram of an electronic device according to an exemplary embodiment.

[0044] Figures 1 to 5 Reference numerals in the drawings:

[0045] 10 - wireless charging circuit, 11 - charging coil module, 12 - voltage output port, 13 - switch module, 131 - first controlled switch, 132 - second controlled switch, 111 - first coil, 112 - second coil, 133 - first end of the first controlled switch, 134 - second end of the first controlled switch, 135 - first end of the second controlled switch, 136 - second end of the second controlled switch, 137 - third end of the first controlled switch, 138 - third end of the second controlled switch, 113 - first end of the first coil, 114 - second end of the first coil, 115 - first end of the second coil, 116 - second end of the second coil, 14 - boost module, 15 - inverter module, 16 - protection module, 1 - electronic device, 100 - control module, 20 - device to be charged. DETAILED DESCRIPTION

[0046] The exemplary embodiments will be described in detail hereinbelow with reference to the drawings. In the following description, the same numbers in different drawings represent the same or similar elements unless otherwise represented. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples of structures consistent with some aspects of the present disclosure as detailed in the appended claims.

[0047] The technical solutions provided by the various embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0048] Figure 1 is a structural schematic of a wireless charging circuit according to an exemplary embodiment Figure 1 As shown in Figure 1 , the wireless charging circuit 10 can include:

[0049] a charging coil module 11;

[0050] a voltage output port 12 electrically connected to the charging coil module 11, configured to output a voltage to the charging coil module 11 so that the charging coil module 11 can emit a charging signal;

[0051] a switch module 13 connected to each connection line between the charging coil module 11 and the voltage output port 12, configured to switch the connection lines between the two ends of the same charging coil in the charging coil module 11 and the voltage output port 12 to be in a conductive or disconnected state at the same time;

[0052] In the case that the switch module 13 is in different switch states, the charging coil module 11 can emit different charging signals to wirelessly charge different devices to be charged (not shown in Figure 1 ).

[0053] In the embodiments of the present disclosure, the wireless charging circuit can be a circuit for wirelessly charging an accessory device of the electronic device. For example, the electronic device can be a tablet computer, and the accessory device can include, but is not limited to, a wireless charging pen and a wireless charging keyboard. The tablet computer can wirelessly charge the wireless charging pen or the wireless charging keyboard by placing the wireless charging pen and the wireless charging keyboard on the two sides of the tablet computer.

[0054] The voltage output port can be a port connected to a power module of the electronic device in the wireless charging circuit. It can be understood that the voltage output port can output the voltage provided by the power module of the electronic device to the charging coil module, so that the charging coil module can emit a charging signal.

[0055] Here, the charging coil module can include a coil for wireless charging. When the voltage output by the voltage output port passes through the charging coil in the charging coil module, the charging coil can generate an alternating magnetic field to emit a charging signal outward, so that the coil in the accessory device can be coupled with the charging coil, thereby realizing wireless charging of the accessory device.

[0056] It should be noted that the specific number of charging coils included in the charging coil module can be set according to the actual application scenario, and the embodiments of the present disclosure do not limit it. For example, the charging coil module can include one charging coil, two charging coils, or three charging coils, etc.

[0057] In the embodiments of the present disclosure, the switch module can be an electronic element capable of switching the on-off state and the current flow direction of the connection line in the wireless charging circuit. For example, the switch module can include, but is not limited to, a switch chip, a field effect transistor, or a relay, etc.

[0058] Here, the different switch states of the switch module can include that the switch module is in a closed state, or the switch module is in an open state.

[0059] It can be understood that when a switch in the switch module is in a closed state, the connection line between the charging coil in the charging coil module corresponding to the switch and the voltage output port can be in a conductive state, and at this time, the accessory device capable of being coupled with the charging coil can be wirelessly charged. When all switches in the switch module are in an open state, the connection lines between all charging coils in the charging coil module and the voltage output port can be in an open state, and at this time, no external accessory device is wirelessly charged.

[0060] It should be noted that the specific number of switch modules can be set according to the actual application scenario, and the embodiments of the present disclosure do not limit. For example, the number of switch modules can be the same as the number of charging coils in the charging coil module, or the number of switch modules can be different from the number of charging coils in the charging coil module.

[0061] For example, in the case of two charging coils in the charging coil module, the switch module can be one; at this time, one switch module can be connected to two charging coils in the charging coil module, that is, the switch module can be a switch chip. Or, in the case of two charging coils in the charging coil module, the switch module can also include two switches; at this time, the switches in the switch module correspond one-to-one to the charging coils in the charging coil module, such as field effect tubes, etc.

[0062] In related technologies, the tablet computer usually adopts a spring needle (pogo pin) power supply mode for wired power supply of the keyboard. The pogo pin is a spring type probe formed by three basic components of needle shaft, spring and needle tube through precise instrument riveting and pre-pressing. However, the keyboard using the pogo pin power supply causes multiple metal contacts on the back of the tablet computer and the keyboard, which can easily cause corrosion marks at the contacts in a humid environment, resulting in unstable connection between the keyboard and the tablet computer, and the overall appearance of the contact connection is not good.

[0063] In order to realize the integrity and aesthetics of the electronic device, the wireless charging mode is usually used to charge the keyboard and electronic stylus, which is more stable than the traditional wired charging mode of the keyboard. However, this wireless charging mode for the keyboard and electronic stylus requires two sets of wireless charging circuits to be set in the tablet computer, which has high cost of material devices, and the two sets of wireless charging circuits occupy a large area of wiring in the tablet.

[0064] Therefore, the wireless charging circuit provided by the embodiments of the present disclosure includes: a charging coil module; a voltage output port electrically connected to the charging coil module, configured to output a voltage to the charging coil module, so that the charging coil module can emit a charging signal; a switch module connected to each connection line between the charging coil module and the voltage output port, configured to switch the connection line between the two ends of the same charging coil in the charging coil module and the voltage output port to be in a conductive or disconnected state at the same time; in the case that the switch module is in different switch states, the charging coil module can emit different charging signals to wirelessly charge different devices to be charged.

[0065] Thus, different from the related art that two sets of wireless charging circuits are used for wireless charging, the embodiment of the present disclosure can set a switch module between the voltage output port and the charging coil module, switch the switch module to be in different switch states, make the charging coil module emit different charging signals, and perform wireless charging on different to-be-charged devices, so as to reduce the cost of material devices of the wireless charging circuit in the electronic device, and reduce the wiring area occupied by the wireless charging circuit in the electronic device. At the same time, the embodiment of the present disclosure can control the connection line between the two ends of the same charging coil in the charging coil module and the voltage output port to be in a conduction or disconnection state at the same time by switching the switch state of the switch module, so that the charging coil module can emit charging signals more accurately, so as to effectively improve the charging efficiency of wireless charging on the to-be-charged device.

[0066] Figure 2 is a structure diagram of a wireless charging circuit according to an example embodiment Figure 2 As shown in Figure 2 , the wireless charging circuit provided by the embodiment of the present disclosure is further divided on the basis of the wireless charging circuit shown in Figure 1 , for example, the above-mentioned switch module includes a first controlled switch and a second controlled switch.

[0067] As shown in Figure 2 , the charging coil module 11 includes a first coil 111 and a second coil 112; the above-mentioned switch module 13 includes:

[0068] The first controlled switch 131, the first end 133 of the first controlled switch is connected to the voltage output port 12, and the second end 134 of the first controlled switch is connected to the first coil 111;

[0069] The second controlled switch 132, the first end 135 of the second controlled switch is connected to the voltage output port 12, and the second end 136 of the second controlled switch is connected to the second coil 112;

[0070] Among them, the to-be-charged device (not shown in Figure 3 ) coupled with the first coil 111 and the to-be-charged device coupled with the second coil 112 are different.

[0071] In the embodiment of the present disclosure, the above-mentioned first controlled switch can be a component for switching the on-off state of the connection line between the voltage output port and the first coil; the above-mentioned second controlled switch can be a component for switching the on-off state of the connection line between the voltage output port and the second coil. Among them, the first coil and the second coil can be different charging coils in the charging coil module.

[0072] It can be understood that when the first controlled switch is in the closed state and the second controlled switch is in the open state, the connection line between the voltage output port and the first coil is in the conductive state, and the connection line between the voltage output port and the second coil is in the open state, that is, the first coil is in the working state and the second coil is in the non-working state; at this time, the first coil can emit a charging signal through the voltage output by the voltage output port to couple with the coil in the wireless charging pen or the wireless charging keyboard, thereby realizing wireless charging of the wireless charging pen or the wireless charging keyboard.

[0073] Similarly, when the first controlled switch is in the open state and the second controlled switch is in the closed state, the connection line between the voltage output port and the first coil is in the open state, and the connection line between the voltage output port and the second coil is in the conductive state, that is, the second coil is in the working state and the first coil is in the non-working state; at this time, the second coil can emit a charging signal through the voltage output by the voltage output port to couple with the coil in the wireless charging pen or the wireless charging keyboard, thereby realizing wireless charging of the wireless charging pen or the wireless charging keyboard.

[0074] It should be noted that when the to-be-charged device coupled with the first coil is a wireless charging pen, the to-be-charged device coupled with the second coil can be a wireless charging keyboard; when the to-be-charged device coupled with the first coil is a wireless charging keyboard, the to-be-charged device coupled with the second coil can be a wireless charging pen, and the embodiments of the present disclosure are not limited thereto.

[0075] In some embodiments, the first controlled switch and the second controlled switch each include a field effect tube. In this way, different levels of signals can be input at the signal input end of the field effect tube to control the switching state of the field effect tube, thereby controlling the connection line between the voltage output port and different coils to be in the conductive state to wirelessly charge different to-be-charged devices.

[0076] Here, the field effect tube can include a first electrical connection end, a second electrical connection end, and a third electrical connection end; the first electrical connection end can be a signal input end, the second electrical connection end can be connected to the voltage output port, and the third electrical connection end is connected to the first coil or the second coil; when different signals are input at the first electrical connection end, the field effect tube is in different switching states.

[0077] In the embodiments of the present disclosure, the field effect tube can be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), abbreviated as MOS tube; the field effect tube can include a gate, a source and a drain. Accordingly, the first electrical connection end can be the gate of the field effect tube, and when the second electrical connection end is the source of the field effect tube, the third electrical connection end can be the drain of the field effect tube; or, when the second electrical connection end is the drain of the field effect tube, the third electrical connection end can be the source of the field effect tube.

[0078] Among them, the field effect tube can be various types of MOS tubes, for example, the field effect tube can be divided into PMOS tube (P-channel type) and NMOS tube (N-channel type).

[0079] It can be understood that, in the case of the field effect tube being a PMOS tube, the first electrical connection end can be the gate, the second electrical connection end can be the drain, and the third electrical connection end can be the source; at this time, a high-level signal can be input to the gate of the PMOS tube to control, and the PMOS tube is in a cut-off state; or, a low-level signal can be input to the gate of the PMOS tube to control, and the PMOS tube is in a conductive state. In the case of the field effect tube being an NMOS tube, the first electrical connection end can be the gate, the second electrical connection end can be the source, and the third electrical connection end can be the drain; at this time, a low-level signal can be input to the gate of the NMOS tube to control, and the NMOS tube is in a cut-off state; or, a high-level signal can be input to the gate of the NMOS tube to control, and the NMOS tube is in a conductive state.

[0080] It should be noted that the specific types of the first controlled switch and the second controlled switch can be set according to actual application conditions, and the embodiments of the present disclosure are not limited. For example, the first controlled switch and the second controlled switch can both be PMOS tubes or NMOS tubes; or, the first controlled switch can be a PMOS tube, and the second controlled switch can be an NMOS tube; or, the first controlled switch can be an NMOS tube, and the second controlled switch can be a PMOS tube, etc.

[0081] Here, in the case that the first controlled switch and the second controlled switch are both PMOS tubes, a high-level signal can be input to the gate of the first controlled switch to control, and a low-level signal can be input to the gate of the second controlled switch to control, so that the first controlled switch is in a cut-off state and the second controlled switch is in a conductive state, i.e. the voltage output port is connected to the second coil; or, a low-level signal can be input to the gate of the first controlled switch to control, and a high-level signal can be input to the gate of the second controlled switch to control, so that the first controlled switch is in a conductive state and the second controlled switch is in a cut-off state, i.e. the voltage output port is connected to the first coil.

[0082] Similarly, in the case that the first controlled switch and the second controlled switch are both NMOS tubes, a low-level signal can be input to the gate of the first controlled switch and a high-level signal can be input to the gate of the second controlled switch to make the first controlled switch in the off state and the second controlled switch in the on state, that is, the voltage output port is connected to the second coil; or, a high-level signal can be input to the gate of the first controlled switch and a low-level signal can be input to the gate of the second controlled switch to make the first controlled switch in the on state and the second controlled switch in the off state, that is, the voltage output port is connected to the first coil, so that different devices to be charged can be wirelessly charged when the switch module is in different switch states.

[0083] In the embodiments of the present disclosure, the first controlled switch can be connected between the voltage output port and the first coil, and the second controlled switch can be connected between the voltage output port and the second coil, so that the switch module and the charging coil in the charging coil module are one-to-one corresponding, and thus the switch state of the switch module connected with the charging coil module can be controlled to control the wireless charging of different devices to be charged, thereby effectively improving the charging efficiency of the wireless charging circuit.

[0084] In some embodiments, as shown in FIG. 1, the first end 133 of the first controlled switch is connected to the first end 113 of the first coil, and the second end 134 of the first controlled switch is connected to the first end 115 of the second coil. Figure 4

[0085] The second end 136 of the second controlled switch is connected to the second end 116 of the second coil, and the third end 138 of the second controlled switch is connected to the second end 114 of the first coil.

[0086] In the case that the first end 133 of the first controlled switch and the second end 134 of the first controlled switch are in the on state, and the first end 135 of the second controlled switch and the third end 138 of the second controlled switch are in the on state, the first coil 111 is in the working state.

[0087] In the case that the first end 133 of the first controlled switch and the third end 137 of the first controlled switch are in the on state, and the first end 135 of the second controlled switch and the second end 136 of the second controlled switch are in the on state, the second coil 112 is in the working state.

[0088] ​In this way, the two ends of the first coil and the two ends of the second coil can be controlled by the switching state of the first controlled switch and the second controlled switch to control whether the connection line between the two ends and the voltage output port is in a conductive state, so that when the first coil or the second coil is not working, the current can be better prevented from flowing back to the other coil, thereby better improving the stability of the wireless charging circuit.

[0089] In the embodiments of the present disclosure, the first end of the first controlled switch can be a port connected to the voltage output port, and the second end of the first controlled switch and the third end of the first controlled switch can be ports connected to the charging coil module; the first end of the second controlled switch can be a port connected to the voltage output port, and the second end of the second controlled switch and the third end of the second controlled switch can be ports connected to the charging coil module.

[0090] Here, the first controlled switch and the second controlled switch can both be field effect tubes; at this time, the first controlled switch is arranged on the connection line between the first end of the first coil and the voltage output port, and the second controlled switch is arranged on the connection line between the first end of the second coil and the voltage output port; the second controlled switch is arranged on the connection line between the second end of the first coil and the voltage output port, and the first controlled switch is arranged on the connection line between the second end of the second coil and the voltage output port. When the field effect tube connected between the first end of the first coil and the voltage output port and the field effect tube connected between the second end of the first coil and the voltage output port are both in a conductive state, the first coil is in a working state; when the field effect tube connected between the first end of the second coil and the voltage output port and the field effect tube connected between the second end of the second coil and the voltage output port are both in a conductive state, the second coil is in a working state.

[0091] In some embodiments, the first controlled switch and the second controlled switch can both be single-pole double-throw relays; the fixed connection end of the single-pole double-throw relay is the first end of the first controlled switch or the first end of the second controlled switch, and the movable connection end of the single-pole double-throw relay is the second end and the third end of the first controlled switch, or the second end and the third end of the second controlled switch. Among them, the single-pole double-throw relay is a commonly used electrical control element, which can be composed of electromagnets, springs and other components to realize the switching control of the circuit where the single-pole double-throw relay is located.

[0092] It can be understood that, in the case that the electromagnet in the single-pole double-throw relay is not powered on, and the first end of the first controlled switch and the second end of the first controlled switch are in a conductive state, and the first end of the second controlled switch and the third end of the second controlled switch are in a conductive state, the first coil is in a working state, at this time the wireless charging circuit can perform wireless charging on the to-be-charged device coupled with the first coil; in the case that the electromagnet in the single-pole double-throw relay is powered on, the electromagnet generates a magnetic field, attracting the first end of the first controlled switch and the third end of the first controlled switch to be closed, and the first end of the second controlled switch and the second end of the second controlled switch to be closed, so that the second coil is in a working state, at this time the wireless charging circuit can perform wireless charging on the to-be-charged device coupled with the second coil.

[0093] In some embodiments, the charging coil module includes a plurality of charging coils, and the switch module includes a switch chip;

[0094] The switch chip has a first end connected to the voltage output port and a plurality of second ends respectively connected to the charging coils, for switching the voltage output port to connect different charging coils.

[0095] In this way, by controlling the closing or opening of the switch chip, the voltage output port can be switched to connect different charging coils, so that different to-be-charged devices can be wirelessly charged, thereby effectively improving the charging efficiency of the wireless charging circuit.

[0096] In the embodiments of the present disclosure, the switch chip can include a plurality of second ends connected to the plurality of charging coils, and the connection lines between the first end and the plurality of second ends of the switch chip can be controlled to be in a conductive or non-conductive state, so as to realize the connection of the voltage output port to different charging coils, and wirelessly charge different to-be-charged devices.

[0097] In some embodiments, as shown in FIG. Figure 4 The wireless charging circuit 10 further includes:

[0098] The boost module 14 is electrically connected to the voltage output port 12, for lifting the voltage output by the voltage output port 12 to obtain a direct-current signal;

[0099] The inverter module 15 is electrically connected to the boost module 14 and the switch module 13, for inverting the direct-current signal into an alternating-current signal, and transmitting the alternating-current signal to the charging coil module 11 through the switch module 13.

[0100] In this way, the voltage output port can output a voltage, the voltage output port can be connected to a voltage boosting module, the voltage output port can output a direct current signal after the voltage is boosted by the voltage boosting module, an inverter module can be connected between the voltage boosting module and a switch module, the direct current signal can be inverted into an alternating current signal by the inverter module, and the alternating current signal can be transmitted to the charging coil module through the switch module, so that the charging coil module can generate an alternating magnetic field based on the alternating current signal to emit a charging signal, thereby achieving wireless charging of the device to be charged and effectively improving the charging efficiency of the wireless charging circuit.

[0101] Here, the voltage boosting module can be a converter that boosts the voltage in the wireless charging circuit; for example, the voltage boosting module can be a fully integrated synchronous boost converter (SGM6611C). The inverter module can be a device that converts a direct current signal into an alternating current signal in the wireless charging circuit; for example, the inverter module can be an inverter (NU1665WDNB).

[0102] It can be understood that the voltage output port outputs a voltage, the voltage is transmitted to the voltage boosting module, the voltage boosting module can output a direct current signal after boosting the voltage, the inverter module can invert the received direct current signal into an alternating current signal, and the alternating current signal can be transmitted to the charging coil through the switch module, so that the charging coil can generate an alternating magnetic field to emit a charging signal, thereby achieving wireless charging of the device to be charged.

[0103] For example, the voltage output port outputs a voltage of 4 volts (V), the voltage boosting module outputs a direct current signal with a voltage of 10V, and the inverter module outputs an alternating current signal with a voltage of 10V.

[0104] It should be noted that the voltage boosting module and the inverter module can each have a pulse width modulation (PWM) control port, such as a PWM-CTR port. Here, the PWM-CTR port can be responsible for generating and managing PWM signals to ensure that the signals are output according to a predetermined duty cycle and frequency; the PWM-CTR port can be used to adjust the output voltage, and by controlling the on-off time of the switching devices in the voltage boosting module and the inverter module, the output voltage can be accurately controlled to meet different power supply requirements.

[0105] In some embodiments, as shown in FIG. 1, the wireless charging circuit 10 further includes: Figure 5

[0106] A protection module 16 is electrically connected between the voltage output port 12 and the voltage boosting module 14, and is configured to disconnect the connection between the voltage output port 12 and the voltage boosting module 14 when the voltage output by the voltage output port 12 is greater than a first preset voltage threshold or the voltage output by the voltage output port 12 is less than a second preset voltage threshold. ​

[0107] The first preset voltage threshold is greater than the second preset voltage threshold.

[0108] In this way, by arranging the protection module between the voltage output port and the voltage boosting module, when the voltage output by the voltage output port is greater than the first preset voltage threshold or the voltage output by the voltage output port is less than the second preset voltage threshold, the risk of damage to the wireless charging circuit can be reduced, the safety of the wireless charging circuit can be improved, and the service life of the wireless charging circuit can be prolonged.

[0109] Here, when the voltage output by the voltage output port is less than or equal to the first preset voltage threshold and greater than or equal to the second preset voltage threshold, the voltage output port can be electrically connected to the voltage boosting module.

[0110] In the embodiments of the present disclosure, the protection module can include a power switch or a load switch, which is automatically turned off to cut off the connection between the voltage output port and the voltage boosting module when it is detected that the voltage output by the voltage output port is greater than the first preset voltage threshold, i.e., the circuit is overloaded, or it is detected that the voltage output by the voltage output port is less than the second preset voltage threshold, i.e., the circuit is under-voltage. The protection module can also include an over-voltage protection chip, which is configured to trigger a fuse to disconnect the voltage output port and the voltage boosting module when the voltage output by the voltage output port is greater than the first preset voltage threshold or the voltage output by the voltage output port is less than the second preset voltage threshold.

[0111] It should be noted that the first preset voltage threshold can be set by the technician according to the maximum voltage value in the wireless charging circuit in the actual application scenario, and the second preset voltage threshold can be set by the technician according to the minimum voltage value in the wireless charging circuit in the actual application scenario, and the embodiments of the present disclosure are not limited.

[0112] Figure 5 is a structural schematic diagram of an electronic device according to an exemplary embodiment, as Figure 5 As shown in the figure, the electronic device provided by the embodiments of the present disclosure can at least include:

[0113] The wireless charging circuit 10 provided by the above-mentioned embodiments of the present disclosure;

[0114] The control module 100 is connected to the switch module 13 of the wireless charging circuit 10, and is configured to control the switch module 13 to be in different switch states to perform wireless charging on different devices to be charged 20.

[0115] In the embodiments of the present disclosure, the electronic device can be any device with wireless charging function, such as a mobile phone, a Tablet Personal Computer (Tablet PC), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device, and the like.

[0116] Here, the control module can be a Central Processing Unit (CPU) of the electronic device.

[0117] It can be understood that when the electronic device needs to perform wireless charging on different devices to be charged, the control module can input a high-level or low-level signal to the switch module to control the switch module to be in different switch states, so that the charging coil module can emit different charging signals.

[0118] For example, when the switch module includes two PMOS tubes, the control module can input a high-level signal to the gate of the PMOS tube connected to the first coil and a low-level signal to the gate of the PMOS tube connected to the second coil. At this time, the PMOS tube connected to the first coil is in a cut-off state, i.e., the first coil does not work; the PMOS tube connected to the second coil is in a conduction state, i.e., the second coil is in a working state.

[0119] In some embodiments, as shown in FIG. 1, the electronic device 1 further includes: Figure 5

[0120] The power supply module 101 is electrically connected to the voltage output port 12 of the wireless charging circuit 10, and is configured to provide a voltage to the voltage output port 12.

[0121] In this way, by setting the power supply module electrically connected to the voltage output port of the wireless charging circuit, the power supply module can provide a voltage to the voltage output port, so that the charging coil can be coupled with the coil in the device to be charged to perform wireless charging on the device to be charged, thereby effectively improving the charging efficiency of the wireless charging circuit.

[0122] In the embodiments of the present disclosure, the power supply module can be a device that provides a power supply voltage in the electronic device; for example, the power supply module can include a battery and a Power Management Integrated Circuit (PMIC) of the electronic device, and the like.

[0123] ​Here, PMIC stands for Power Management Chip. It can be responsible for the conversion, distribution, detection and other power management of electrical energy in electronic equipment systems. The power management chip can control and monitor the input and output of various voltages and currents in the power system, thereby ensuring the stable and safe operation of the power system.

[0124] In some embodiments, such as Figure 6 As shown, the first coil 111 and the second coil 112 of the wireless charging circuit 10 are located on opposite sides of the electronic device 1.

[0125] In this way, by placing the first coil and the second coil of the wireless charging circuit on opposite sides of the electronic device, wireless charging of the device to be charged can be achieved more rationally on opposite sides of the electronic device, thereby improving the charging efficiency of the electronic device.

[0126] It should be noted that the frame of the electronic device can be rectangular, which includes two opposite short sides and two opposite long sides; the first coil and the second coil of the wireless charging circuit can be respectively set at the two opposite long sides of the electronic device to better meet the user's wireless charging needs for the device to be charged.

[0127] In some embodiments, when the wireless charging pen and the wireless charging keyboard of the device to be charged are placed on both sides of an electronic device such as a tablet computer, i.e., when they are both in place, different charging strategies can be used to wirelessly charge the wireless charging pen and the wireless charging keyboard.

[0128] The charging strategies are as follows: First, read the current battery levels of the wireless charging pen and keyboard, determining their remaining charge levels as Q1 and Q2 respectively. If both are below 50%, the charging time allocated to the wireless charging pen can be t1 = Q1 / (Q1+Q2)*t, and the charging time allocated to the wireless charging keyboard can be t2 = Q2 / (Q1+Q2)*t, where t is a charging cycle (e.g., 30 seconds), which can be adjusted according to the tablet's battery capacity. Second, if both are above 50%, allocate charging time equally between the wireless charging pen and keyboard according to t1 = 1 / 2t and t2 = 1 / 2t respectively. Third, if one device is below 50% and the other is above 50%, prioritize charging the device with the lower charge level until fully charged. Fourth, if one device is fully charged, prioritize wireless charging the other device.

[0129] In the embodiments of the present disclosure, the switch module can be arranged between the voltage output port and the charging coil module, and by switching the switch module to be in different switch states, the charging coil module can emit different charging signals to wirelessly charge different to-be-charged devices, so as to reduce the cost of material devices of the wireless charging circuit arranged in the electronic device, and reduce the wiring area occupied by the wireless charging circuit in the electronic device. At the same time, the embodiments of the present disclosure can control the connection line between the two ends of the same charging coil in the charging coil module and the voltage output port to be in a conductive or disconnected state at the same time by switching the switch state of the switch module, so that the charging coil module can emit charging signals more accurately. In addition, the embodiments of the present disclosure can wirelessly charge different to-be-charged devices by different time-sharing charging strategies, so as to effectively improve the charging efficiency of the wireless charging circuit.

[0130] Figure 6 FIG. 6 is a structural block diagram of an electronic device according to an example embodiment. For example, the electronic device 600 can be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like.

[0131] Referring to ​ The electronic device 600 can include one or more of the following components: a processing component 602, a memory 604, a power supply component 606, a multimedia component 608, an audio component 610, an input / output (I / O) interface 612, a sensor component 614, and a communication component 616.

[0132] The processing component 602 usually controls overall operations of the electronic device 600, such as operations associated with display, telephone call, data communication, camera operation, and recording operation. The processing component 602 can include one or more processors 620 to execute instructions to complete all or part of the steps of the methods described above. In addition, the processing component 602 can include one or more modules to facilitate the interaction between the processing component 602 and other components. For example, the processing component 602 can include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602.

[0133] The memory 604 is configured to store various types of data to support operations of the electronic device 600. Examples of such data include at least one of instructions for any application or method operating on the electronic device 600, contact data, phonebook data, messages, pictures, and videos. The memory 604 can be implemented by any type of volatile or nonvolatile memory, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disc, or an optical disc.

[0134] The power component 606 supplies power to various components of the electronic device 600. The power component 606 can include at least one of a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 600.

[0135] The multimedia component 608 includes a screen providing an output interface between the electronic device 600 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes the touch panel, the screen can be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense a touch, a slide, and a gesture on the touch panel. The touch sensor can not only sense a boundary of a touching or a sliding action, but also detect duration and pressure related to the touching or sliding action. In some embodiments, the multimedia component 608 includes a front camera and / or a back camera. When the electronic device 600 is in an operation mode, such as a photographing mode or a video mode, the front camera and / or the back camera can receive external multimedia data. Each of the front camera and the back camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0136] The audio component 610 is configured to output and / or input audio signals. For example, the audio component 610 includes a microphone (MIC) that is configured to receive an external audio signal when the electronic device 600 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 604 or transmitted via the communication component 616. In some embodiments, the audio component 610 also includes a speaker for outputting audio signals.

[0137] The I / O interface 612 provides an interface between the processing component 602 and peripheral interface modules, which can include a keyboard, a click wheel, buttons, and so on. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0138] The sensor component 614 includes one or more sensors for providing status assessments of various aspects of the electronic device 600. For example, the sensor component 614 can detect an open / closed position of the electronic device 600, relative positioning of components, such as a display and a keypad of the electronic device 600, a change in position of the electronic device 600 or a component thereof, the presence or absence of user contact with the electronic device 600, the orientation or acceleration / deceleration of the electronic device 600, and a temperature change of the electronic device 600. The sensor component 614 can include a proximity sensor configured to detect the presence of a nearby object without any physical touch. The sensor component 614 can also include a light sensor, such as a complementary metal oxide semiconductor (CMOS) or charge coupled device (CCD) image sensor, utilized in an imaging application. In some embodiments, the sensor component 614 can further include at least one of an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, and a temperature sensor.

[0139] The communication component 616 is configured to facilitate wired or wireless communication between the electronic device 600 and other devices. The electronic device 600 can access a wireless network based on a communication standard, such as Wi-Fi, 4G, 5G, or a combination thereof. In an example embodiment, the communication component 616 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an example embodiment, the communication component 616 also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wide Band (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0140] In example embodiments, the electronic device 600 can be implemented with one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, or other electronic elements.

[0141] It is also noted that the terms "comprise", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0142] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[0143] It should be understood that the present disclosure is not limited to the precise structures as herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A wireless charging circuit, comprising: The wireless charging circuit comprises: a charging coil module; a voltage output port electrically connected to the charging coil module, configured to output a voltage to the charging coil module, so that the charging coil module can emit a charging signal; a switch module connected to each connection line between the charging coil module and the voltage output port, configured to switch the connection line between the two ends of the same charging coil in the charging coil module and the voltage output port to be in a conductive or disconnected state at the same time. In the case that the switch module is in different switch states, the charging coil module can emit different charging signals to wirelessly charge different devices to be charged.

2. The wireless charging circuit of claim 1, wherein, The charging coil module comprises a first coil and a second coil; the switch module comprises: a first controlled switch, a first end of the first controlled switch being connected to the voltage output port, and a second end of the first controlled switch being connected to the first coil; a second controlled switch, a first end of the second controlled switch being connected to the voltage output port, and a second end of the second controlled switch being connected to the second coil; wherein the device to be charged coupled with the first coil and the device to be charged coupled with the second coil are different.

3. The wireless charging circuit of claim 2, wherein, The second end of the first controlled switch is connected to the first end of the first coil, and the third end of the first controlled switch is connected to the first end of the second coil; The second end of the second controlled switch is connected to the second end of the second coil, and the third end of the second controlled switch is connected to the second end of the first coil; In the case that the first end of the first controlled switch and the second end of the first controlled switch are in a conductive state, and the first end of the second controlled switch and the third end of the second controlled switch are in a conductive state, the first coil is in a working state; In the case that the first end of the first controlled switch and the third end of the first controlled switch are in a conductive state, and the first end of the second controlled switch and the second end of the second controlled switch are in a conductive state, the second coil is in a working state.

4. The wireless charging circuit of claim 2, wherein, The first controlled switch and the second controlled switch each comprise a field effect transistor.

5. The wireless charging circuit of claim 1, wherein, The charging coil module comprises a plurality of charging coils, and the switch module comprises a switch chip; The switch chip, a first end of the switch chip being connected to the voltage output port, and a plurality of second ends of the switch chip being respectively connected to each charging coil, configured to switch the voltage output port to be connected to different charging coils.

6. The wireless charging circuit of any one of claims 1 to 5, wherein, The wireless charging circuit further comprises: a boost module electrically connected to the voltage output port, configured to lift the voltage output by the voltage output port to obtain a direct current signal; an inverter module electrically connected to the boost module and the switch module, configured to invert the direct current signal into an alternating current signal, and transmit the alternating current signal to the charging coil module through the switch module.

7. The wireless charging circuit of claim 6, wherein, The wireless charging circuit further comprises: A protection module is electrically connected between the voltage output port and the voltage boosting module, configured to disconnect the connection between the voltage output port and the voltage boosting module when the voltage output by the voltage output port is greater than a first preset voltage threshold or the voltage output by the voltage output port is less than a second preset voltage threshold. The first preset voltage threshold is greater than the second preset voltage threshold.

8. An electronic device, comprising: The electronic device comprises: The wireless charging circuit according to any one of claims 1 to 7; A control module is connected to the switch module of the wireless charging circuit, configured to control the switch module to be in different switch states to wirelessly charge different devices to be charged.

9. The electronic device of claim 8, wherein, The electronic device further comprises: A power supply module is electrically connected to the voltage output port of the wireless charging circuit, configured to provide a voltage to the voltage output port.

10. The electronic device of claim 8, wherein, The first coil of the wireless charging circuit and the second coil of the wireless charging circuit are respectively located on opposite sides of the electronic device.

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