CN219420382U - Intelligent pen capable of charging at intervals, and spaced power supply device and system - Google Patents

Abstract

The application discloses an intelligent pen capable of being charged in a spaced mode, a spaced power supply device and a system, wherein the intelligent pen capable of being charged in a spaced mode comprises a load element, a receiving circuit, a rectifying circuit and a voltage regulating circuit, wherein the voltage regulating circuit is connected with the load element, the receiving circuit comprises at least one receiving coil, the receiving coil is matched with the resonance frequency of a transmitting coil in the spaced power supply device, the transmitting coil is used for converting electric energy into magnetic energy, and the receiving coil is used for converting magnetic energy in the environment into an electric signal; when the intelligent pen is in the magnetic field range generated by the air-insulated power supply device, the receiving circuit converts magnetic energy in the environment into an electric signal, the rectifying circuit rectifies the electric signal to obtain a direct current signal, and the voltage regulating circuit regulates the voltage of the direct current signal into a target voltage required by the load element. Through the mode, the intelligent pen can be used for charging the intelligent pen in a spaced mode.

Description

Intelligent pen capable of charging at intervals, and spaced power supply device and system

Technical Field

The application relates to the technical field of electronic equipment, in particular to an intelligent pen capable of charging in a spaced mode, a spaced power supply device and a system.

Background

With the development of technology, smart pens are popular with more and more people. The intelligent pen adopts writing and voice and remote control technology, and can be used for writing on intelligent screens directly in occasions such as teaching, speech and meeting, collecting, translating and amplifying voice, remotely controlling display information and operation control of the intelligent screens and the like.

At present, the intelligent pen needs to be electrically connected with a socket or in contact with a wireless charging base to charge, so that a user cannot use the intelligent pen in the charging process. When a user needs to use the intelligent pen for a long time, the user often worry that the electric quantity of the intelligent pen is insufficient, and the intelligent pen is in use and cannot charge the intelligent pen in time, so that the user has power-down anxiety in the use process of the intelligent pen.

Disclosure of Invention

The technical problem that this application mainly solves is to provide one kind and can separate empty intelligent pen that charges, separate empty power supply unit and system, can separate empty charge to the intelligent pen that is using.

In order to solve the technical problem, a first aspect of the present application provides an intelligent pen capable of insulating and charging, which comprises a load element, a receiving circuit, a rectifying circuit and a voltage regulating circuit, wherein the voltage regulating circuit is connected with the load element, the receiving circuit comprises at least one receiving coil, the receiving coil is matched with the resonance frequency of a transmitting coil in an insulating power supply device, the transmitting coil is used for converting electric energy into magnetic energy, and the receiving coil is used for converting magnetic energy in the environment into an electric signal; when the intelligent pen is in the magnetic field range generated by the air-insulated power supply device, the receiving circuit converts magnetic energy in the environment into an electric signal, the rectifying circuit rectifies the electric signal to obtain a direct current signal, and the voltage regulating circuit regulates the voltage of the direct current signal into a target voltage required by the load element.

In order to solve the technical problem, a second aspect of the present application provides an air-insulated power supply device, which comprises a power supply circuit, a controller, a driving circuit, an inverter circuit, and a transmitting circuit connected with the inverter circuit, wherein the transmitting circuit comprises at least one transmitting coil, and the resonant frequency of the transmitting coil is matched with that of a receiving coil of a smart pen; the power supply circuit is used for providing a power supply signal, the controller is used for outputting a control signal based on the power supply signal, the driving circuit is used for generating a driving signal based on the control signal, the inverter circuit is used for generating an alternating current electric signal based on the driving signal, and the transmitting circuit is used for converting electric energy of the alternating current electric signal into magnetic energy.

In order to solve the technical problem, a third aspect of the present application provides a space-isolated power supply system, which comprises the intelligent pen capable of being charged in a space-isolated manner and a space-isolated power supply device.

The beneficial effects of this application are: different from the condition of the prior art, the intelligent pen capable of being charged in a spaced mode comprises a load element, a receiving circuit, a rectifying circuit and a voltage regulating circuit, wherein the voltage regulating circuit is connected with the load element, the receiving circuit comprises at least one receiving coil, the receiving coil is matched with the resonance frequency of a transmitting coil in a spaced power supply device, the transmitting coil is used for converting electric energy into magnetic energy, and the receiving coil is used for converting magnetic energy in the environment into an electric signal; when the intelligent pen is in the magnetic field range generated by the air-insulated power supply device, the receiving circuit converts magnetic energy in the environment into an electric signal, the rectifying circuit rectifies the electric signal to obtain a direct current signal, and the voltage regulating circuit regulates the voltage of the direct current signal into a target voltage required by the load element. In the scheme, the receiving coil is matched with the resonant frequency of the transmitting coil in the air-insulated power supply device, so that the air-insulated power supply device can transmit electric energy to the intelligent pen based on the magnetic resonance effect and is suitable for long-distance charging, and the electric energy is regulated to an electric signal suitable for being output to a load element through the rectifying circuit and the voltage regulating circuit, so that the air-insulated charging of the intelligent pen in use can be realized.

Drawings

For a clearer description of the technical solutions in the present application, the drawings required in the description of the embodiments will be briefly described below, it being obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a block diagram of one embodiment of a smart pen capable of intermittent charging;

FIG. 2 is a block diagram of another embodiment of a smart pen capable of off-air charging of the present application;

fig. 3 is a schematic circuit diagram of the receiving module a' in fig. 2;

FIG. 4 is a schematic circuit diagram of a further embodiment of a smart pen capable of off-air charging according to the present application;

FIG. 5 is a block diagram of one embodiment of a space-time power supply of the present application;

FIG. 6 is a block diagram of another embodiment of the spaced apart power supply device of the present application;

fig. 7 is a schematic circuit diagram of a transmitting module B' in fig. 6;

FIG. 8 is a schematic circuit diagram of another embodiment of the power supply device;

fig. 9 is a block diagram illustrating a structure of an embodiment of the space-based power supply system of the present application.

Detailed Description

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The terms "first," "second," and the like in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1 to 4, fig. 1 is a schematic block diagram of an embodiment of a smart pen capable of being charged by air, fig. 2 is a schematic block diagram of another embodiment of a smart pen capable of being charged by air, fig. 3 is a schematic circuit diagram of a receiving module a' in fig. 2, and fig. 4 is a schematic circuit diagram of another embodiment of a smart pen capable of being charged by air.

As shown in fig. 1, in the present embodiment, the smart pen 100 capable of space-time charging includes a load element 110, a receiving circuit 120, a rectifying circuit 130, and a voltage regulating circuit 140. The voltage adjusting circuit 140 is connected to the load element 110, and the receiving circuit 120 includes at least one receiving coil, where the receiving coil is matched with a resonant frequency of a transmitting coil in the air-insulated power supply device, the transmitting coil is used for converting electric energy into magnetic energy, and the receiving coil is used for converting magnetic energy in the environment into an electric signal. When the smart pen 100 is in the magnetic field range generated by the spaced power supply device, the receiving circuit 120 converts magnetic energy in the environment into an electric signal, the rectifying circuit 130 rectifies the electric signal to obtain a direct current signal, and the voltage regulating circuit 140 regulates the voltage of the direct current signal to a target voltage required by the load element 110.

Wherein the load element 110 may include, but is not limited to: battery, power consumption element. Electrical components such as audio collection components, audio playback components, display components, communication components, touch screen detection components, and the like. Wherein the audio collecting element is used for collecting sounds around the smart pen 100, such as collecting teaching audio of a teacher; the audio playing element is used for playing audio, such as playing a speech countdown prompt tone; the display element is used for displaying information such as characters, pictures and the like, for example, displaying information to prompt a user; the communication element is used for communicating with other devices, and may include, but is not limited to, a bluetooth communication element, a WiFi communication element, etc.; the touch screen detection element is used to detect whether the smart pen 100 is in contact with the electronic blackboard, and may include a capacitive element.

The receiving circuit 120 comprises at least one receiving coil capable of converting magnetic energy in the environment into electrical energy. Alternatively, the number of turns, material, winding manner, etc. of the receiving coil may be selected according to practical situations, which is not limited herein. The resonant frequency of the receiving coil and the transmitting coil in the air-insulated power supply device can be the same as or approximately equal to the resonant frequency of the receiving coil and the transmitting coil in the air-insulated power supply device, so that the receiving coil and the transmitting coil can generate magnetic resonance effect, and electric energy is transmitted through magnetic resonance.

The rectifying circuit 130 is connected to the receiving circuit 120, and is configured to rectify the ac signal output by the receiving circuit 120 to obtain a dc signal, so as to be suitable for the power consumption requirement of the rear load element 110. In some embodiments, the rectifying circuit 130 may be a half-wave rectifying circuit, a full-wave rectifying circuit, or a bridge rectifying circuit composed of a transistor diode or a Field Effect Transistor (FET). In one example, the rectifying circuit 130 may be a diode rectifier. In another example, as shown in fig. 3, the rectifying circuit 130 may be a full-wave rectifying circuit composed of four field effect transistors, which is more efficient than a diode rectifier.

The voltage adjusting circuit 140 is connected to the rectifying circuit 130 and the load element 110, and is configured to adjust the voltage of the dc signal output by the rectifying circuit 130 to a target voltage required by the load element 110. In some embodiments, as shown in fig. 3, the voltage regulating circuit 140 may include at least one of a linear regulator 141 and a voltage converter 142. The linear voltage regulator 141 can provide an accurate output voltage without noise, and has a fast response speed to load variation. The voltage converter 142 mainly functions as voltage conversion, and may also be voltage-stabilized or the like. The kinds and the number of the linear voltage stabilizer 141 and the voltage converter 142 may be selected according to practical situations, and are not limited herein.

In one example, the linear regulator 141 may be an LDO (low dropout regulator, low dropout linear regulator) that uses a transistor or field effect transistor operating in its saturation region to subtract excess voltage from the applied input voltage to produce a regulated output voltage, thereby being able to adapt to different loads to produce currents matching the loads under different load conditions. In other examples, the linear regulator 141 may also be an NPN regulator, a quasi-low dropout linear regulator (QLDO), a PMOS ultra-low dropout linear regulator, an NMOS ultra-low dropout linear regulator, or the like.

In one example, the voltage converter 142 may be a switched capacitor voltage converter, also known as a charge pump (charge pump), which is a direct current-to-direct current (DC-DC) converter that uses a "flying" or "pumping" capacitor (non-inductive or transformer) to store energy. The working principle of the switch capacitor voltage converter is that the ratio of output voltage to input voltage is changed by using a controlled switch and a capacitor, and in the use process of a battery, the multiplication factors of a circuit are automatically and sequentially changed along with the reduction of the voltage, so that the voltage of the battery is changed from small to large, and the high enough output voltage can be ensured to be driven when the voltage of the battery is changed. In other examples, other types of DC-DC converters may also be selected as desired, such as Step-up/Boost (Step-up) converters, buck-Boost (Buck-Boost) converters, and the like.

In some embodiments, the smart pen 100 further includes a filter circuit 150, where one end of the filter circuit 150 is connected to the receiving circuit 120, and the other end of the filter circuit 150 is connected to the rectifying circuit 130, for performing a filtering process on an electrical signal generated by the receiving circuit 120, and inputting the filtered electrical signal to the rectifying circuit 130. The filter circuit 150 may be composed of a resistor and a capacitor. In an example, the filter circuit 150 includes a first capacitor and a second capacitor connected in parallel, one end of the first capacitor and one end of the second capacitor are connected to the receiving coil, the other end of the first capacitor and the first resistor are connected in series, and one end of the first resistor is connected to the rectifying circuit 130.

In some embodiments, the smart pen 100 further includes an electrical quantity sensor 160 and a receiving communication circuit 170. The power sensor 160 is configured to detect a remaining power of the smart pen 100, and obtain the remaining power of the smart pen 100. The electric quantity sensor 160 is a detection device, and can sense the information of the detected electric quantity, and can convert the information sensed by detection into an electric signal or other information output in a required form according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like. In an example, the power sensor 160 is configured to detect the power of the battery of the smart pen 100, so as to obtain the remaining power of the smart pen 100. For example, the charge sensor 160 is a battery sensor that can measure battery voltage, current, and temperature, while also calculating battery remaining time. Alternatively, the specific type and parameters of the electrical quantity sensor 160 may be selected according to actual needs, and are not limited herein. The receiving communication circuit 170 is configured to send a power supply instruction to the air-insulated power supply device where the transmitting coil is located, so that the air-insulated power supply device controls the transmitting coil to generate a magnetic field. In an embodiment, when the remaining power of the smart pen 100 is less than the preset threshold, the power sensor 160 sends an electrical signal to the receiving communication circuit 170, so that the receiving communication circuit 170 sends a power supply command to the spaced power supply device where the transmitting coil is located. The preset threshold is, for example, 10%, 20%, 30% of the total electric quantity, and may be specifically set or modified according to actual situations, and in addition, the preset threshold may be modified by a user.

The receive communication circuitry 170 may include, but is not limited to: bluetooth communication circuitry, wiFi communication circuitry, etc. Wherein, bluetooth communication circuit includes bluetooth communication element, and wiFi communication circuit includes wiFi communication element. The receiving communication circuit 170 can be communicatively coupled to a transmitting communication circuit in the spaced apart power supply device to issue a power supply command to the spaced apart power supply device.

In some implementations, the receiving communication circuit 170 and the transmitting communication circuit are both bluetooth communication circuits, and the smart pen 100 and the spaced power supply device may be pre-connected with bluetooth pairing, or may be connected with bluetooth pairing when sending a power supply command. For example, the smart pen 100 may scan a device to be paired in an environment, determine, according to a device identifier of the device to be paired, whether the type of the device to be paired is a stand-off power supply device, and if yes, send a pairing request to the stand-off power supply device. Correspondingly, the spaced power supply device receives a pairing request of the intelligent pen 100, determines whether the device type requiring pairing is the intelligent pen 100 or not based on the device identification requiring pairing, and if yes, the pairing is successful. In another example, the spaced power supply device may scan the device to be paired in the environment, and determine whether the device type to be paired is the smart pen 100 according to the device identifier of the device to be paired, if so, send a pairing request to the smart pen 100, which is not described herein.

In some embodiments, as shown in fig. 2, the smart pen 100 further includes a controller 180, and the controller 180 is respectively connected to the receiving circuit 120, the rectifying circuit 130, the voltage regulating circuit 140, the power sensor 160, and the receiving communication circuit 170, and the receiving circuit 120, the rectifying circuit 130, the voltage regulating circuit 140, the power sensor 160, and the receiving communication circuit 170 operate under control instructions of the controller 180. In an example, the controller 180 may be a microcontroller 180 (Microcontroller Unit, i.e., MCU).

In some embodiments, as shown in fig. 2, the controller 180, the rectifying circuit 130, and the voltage regulating circuit 140 may be integrated in one receiving chip a'. In addition, a capacitor can be externally connected to the outside of the receiving chip A', so that the stability of voltage output is improved.

In some embodiments, the smart pen 100 includes a housing (not shown), and the material of the housing of the smart pen 100 may include metal, plastic, glass, and other materials. Since magnetic resonance only generates charge in a small 3D space, any metal objects in the surroundings may not be affected, so long as the receive circuit 120 is operating at a reasonable frequency, the device may be charged without affecting other metal elements.

In the scheme, the intelligent pen capable of being charged in a spaced mode comprises a load element, a receiving circuit, a rectifying circuit and a voltage regulating circuit, wherein the voltage regulating circuit is connected with the load element, the receiving circuit comprises at least one receiving coil, the receiving coil is matched with the resonance frequency of a transmitting coil in a spaced power supply device, the transmitting coil is used for converting electric energy into magnetic energy, and the receiving coil is used for converting magnetic energy in the environment into an electric signal; when the intelligent pen is in the magnetic field range generated by the air-insulated power supply device, the receiving circuit converts magnetic energy in the environment into an electric signal, the rectifying circuit rectifies the electric signal to obtain a direct current signal, and the voltage regulating circuit regulates the voltage of the direct current signal into a target voltage required by the load element. In the scheme, the receiving coil is matched with the resonant frequency of the transmitting coil in the air-insulated power supply device, so that the air-insulated power supply device can transmit electric energy to the intelligent pen based on the magnetic resonance effect and is suitable for long-distance charging, and the electric energy is regulated to an electric signal suitable for being output to a load element through the rectifying circuit and the voltage regulating circuit, so that the air-insulated charging of the intelligent pen in use can be realized.

Referring to fig. 5 to 8, fig. 5 is a schematic block diagram of an embodiment of a power supply device with space therebetween, fig. 6 is a schematic block diagram of another embodiment of the power supply device with space therebetween, fig. 7 is a schematic circuit diagram of a transmitting module B' in fig. 6, and fig. 8 is a schematic circuit diagram of another embodiment of the power supply device with space therebetween.

As shown in fig. 5, in the present embodiment, the space-adiabatic power supply apparatus 200 includes a power supply circuit 210, a controller 220, a driving circuit 230, an inverter circuit 240, and a transmitting circuit 250 connected to the inverter circuit 240. Wherein the transmitting circuit 250 comprises at least one transmitting coil, the transmitting coil matching the resonant frequency of the receiving coil of the smart pen. The power supply circuit 210 is configured to supply a power supply signal, the controller 220 is configured to output a control signal based on the power supply signal, the driving circuit 230 is configured to generate a driving signal based on the control signal, the inverter circuit 240 is configured to generate an alternating current signal based on the driving signal, and the transmitting circuit 250 is configured to convert electric energy of the alternating current signal into magnetic energy.

In one embodiment, the power circuit 210 may input a dc power with a predetermined voltage value (e.g. 5V). The isolated power supply device 200 is provided with at least one charging port, such as a USB charging port, a Type-C charging port, etc., so as to be connected with the charging port through an external charger, the external charger converts the commercial power into a preset voltage value, and then the input power circuit 210 supplies power to the isolated power supply device 200. In one example, the power supply circuit 210 may include a wire, and in another example, as shown in fig. 8, the power supply circuit 210 may further include a switching element 211 for controlling whether or not to input a power supply signal to the voltage adjustment circuit 260. The power supply device 200 includes a main controller 220 (not shown, for example, a CPU), where the main controller 220 is connected to the switching element 211 to control on and off of the switching element 211, and when the switching element 211 is on, a power signal is input to the voltage adjusting circuit 260 through the switching element 211, and when the switching element 211 is off, the power signal cannot pass through the switching element 211. The switching element 211 may be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal-Oxide semiconductor field effect transistor), the gate of the switching element 211 is connected to the main controller 220, the source is connected to the charging port, and the drain is connected to the voltage regulating circuit 260. In other examples, the switching element 211 may also be other switching elements such as a field effect transistor, which is not limited herein.

In some embodiments, the controller 220 is coupled to the drive circuit 230 for controlling the operation of the electronic components in the coupled circuits. The type of the controller 220 may be selected according to practical situations, and is not limited herein. For example, the controller 220 may be a microcontroller 220, and may specifically be a 32-bit ARM microcontroller 220.

In some embodiments, the driving circuit 230 is located between the controller 220 and the inverter circuit 240, and is an intermediate circuit for amplifying the signal of the controller 220 to amplify the signal of the control circuit so as to drive the inverter circuit 240. In an example, as shown in fig. 7, the driving circuit 230 may include a PWM (PulseWidthModulation) generator and an FSK (frequency shift keying) modulator, and two half-bridge driving control circuits connecting the PWM generator and the FSK modulator. PWM is a method of digitally encoding the analog signal level. With the use of a high resolution counter, the duty cycle of the square wave is modulated to encode the level of a particular analog signal. The FSK modulator is used to control the variation of the carrier frequency (i.e., the drive signal) based on the digital signal. The inverter circuit 240 may include a positive half-bridge inverter circuit that is turned on when the voltage of the driving signal is positive and a negative half-bridge inverter circuit that is turned on when the voltage of the driving signal is negative, whereby an ac power signal may be generated. Each half-bridge inverter circuit is correspondingly connected with one half-bridge drive control circuit, and the half-bridge drive control circuits connected with different half-bridge inverter circuits in the same inverter circuit 240 are different. Each half-bridge inverter circuit may include at least one field effect transistor.

The half-bridge driving control circuit may include an I/O port, also referred to as an input/output interface, and inputs various commands and parameters through the controller 220, and controls the related I/O circuit and simple external devices to perform corresponding operations.

In some embodiments, the isolated power supply apparatus 200 may further include a voltage adjustment circuit 260, where the voltage adjustment circuit 260 is located between the power supply circuit 210 and the controller 220, and between the power supply circuit 210 and the driving circuit 230, and is used for performing voltage adjustment on the power supply signal, for example, adjusting the power supply signal to a preset voltage value, and stabilizing the power supply signal. In an example, the voltage regulation circuit 260 may include a voltage regulator, such as a linear voltage regulator or the like. In an example, the voltage regulating circuit 260 may be a low dropout linear regulator LDO. In another example, the voltage regulating circuit 260 includes a Buck (Buck) converter, which is a non-isolated DC conversion circuit with an output voltage less than or equal to the input voltage, and a first voltage regulator (e.g., LDO5V, i.e., LDO with an output voltage of 5V). The Buck converter has better efficiency than the LDO, the LDO has cleaner output signal than the Buck converter, and the Buck converter has advantages of the Buck converter and the LDO, and after the power signal is input into the voltage regulating circuit 260, the Buck converter can be selectively connected with one of the Buck converter and the LDO to obtain a first voltage regulating signal, and the first voltage regulating signal is used for providing an electrical signal for the whole internal power management. In addition, the voltage regulating circuit 260 may further include at least one of a second voltage regulator (e.g., LDO33, i.e., LDO with an output voltage of 3.3V), and a third voltage regulator (e.g., LDO18, i.e., LDO with an output voltage of 1.8V), and the first voltage regulating signal is selectively input to at least one of the second voltage regulator and the third voltage regulator according to a voltage value required by the back-end circuit.

In some embodiments, the air-insulated power supply 200 may further include a frequency adjustment circuit 270, the frequency adjustment circuit 270 being located between the transmitting circuit 250 and the inverting circuit 240 for adjusting a vibration frequency of the transmitting coil in the transmitting circuit 250 to adjust the vibration frequency of the transmitting coil in the transmitting circuit 250 to match a resonance frequency of the transmitting coil with a receiving coil of the smart pen when the transmitting frequency inherent to the transmitting coil in the transmitting circuit 250 does not match the receiving frequency of the receiving coil. The frequency adjustment circuit 270 may include a capacitor, an inductor, and other circuit elements. In one example, the frequency adjustment circuit 270 includes a series capacitor for setting a resonant frequency matched to the receiving coil within the space-apart power supply device 200.

In some embodiments, the space-time power supply apparatus 200 may further include a current detection circuit 280 and at least two inverter circuits 240 connected with the controller 220. The transmitting circuit 250 includes at least two transmitting coils, and the inverter circuit 240 is connected to the transmitting coils in a one-to-one correspondence. The current detection circuit 280 is used to detect a current value in the inverter circuit 240. The controller 220 is configured to control the inverter circuit 240 having the largest current value to enter an on state, and the remaining inverter circuits 240 enter an off state, thereby reducing power consumption of the transmitting terminal. It will be appreciated that when the transmitting coil is parallel to the receiving coil, the current value in the inverter circuit 240 is the greatest, and the power transmitted is the greatest, but the position and angle of the smart pen relative to the spaced power supply device 200 are also changed during use, so that the relative positional relationship between the receiving coil and the transmitting coil is also changed, so that when the positions and angles of the smart pen can be changed by using a plurality of transmitting coils, the transmitting coil closest to the receiving coil in parallel is selected to transmit electromagnetic waves, and the magnetic energy transmission effect is the best. Wherein each inverter circuit 240 may be driven by an independent I/O (input output) port to facilitate independent control of the on or off of each inverter circuit 240. The I/O port is also referred to as an input/output interface, and inputs various commands and parameters through the controller 220 and controls the related I/O circuits and simple external devices to perform corresponding operations.

Alternatively, each inverter circuit 240 may correspond to one current detection circuit 280, or a plurality of inverter circuits 240 may share one current detection circuit 280.

In some embodiments, as shown in fig. 7 and 8, the current detection circuit 280 includes a sampling capacitor 281, a sampling resistor 282 connected in parallel with the sampling capacitor 281, and a comparison circuit 183, one end of the sampling resistor 282 is connected to the power supply signal, the other end is connected to the inverter circuit 240, both ends of the sampling capacitor 281 are connected to the comparison circuit 283, and the current value in the inverter circuit 240 is detected by the comparison circuit 283. The comparing circuit 283 may include two comparators respectively connected to one end of the sampling capacitor 281.

In some embodiments, the controller 220, the voltage regulation circuit 260, the comparison circuit in the current detection circuit 280, and the driving circuit 230 may be integrated into a chip.

In some embodiments, the power-on-air device 200 further includes a transmit communication circuit 290 coupled to the controller 220. The transmitting communication circuit 290 is configured to receive a power supply command sent by the smart pen 100, and the controller 220 controls the spaced power supply device 200 to enter a spaced power supply state based on the power supply command. Among other things, the transmit communication circuit 290 may include, but is not limited to: bluetooth communication circuitry, wiFi communication circuitry, etc. Wherein, bluetooth communication circuit includes bluetooth communication element, and wiFi communication circuit includes wiFi communication element.

The spaced power supply device 200 based on the magnetic resonance charging technology can supply power to a plurality of intelligent pens at the same time.

Referring to fig. 9, fig. 9 is a schematic block diagram illustrating an embodiment of a space-based power supply system according to the present application.

The spaced power supply system 300 includes the smart pen 100 capable of being charged by spaced in any of the above embodiments and the spaced power supply device 200 in any of the above embodiments, and the smart pen 100 and the spaced power supply device 200 can be connected in communication.

In some implementations, the smart pen 100 and the spaced power supply device 200 are disposed in a teaching space, where the teaching space may further include an electronic blackboard (not shown), and the smart pen 100 and the electronic blackboard may be used together. The smart pen 100 and the electronic blackboard can be used in combination by adopting capacitive touch, electromagnetic induction and infrared touch technologies, but are not limited to the above. In this embodiment scenario, the teacher is a normal user of the smart pen 100, and the teacher in a lesson just ends the use, and the teacher in the next lesson is used next, and the smart pen 100 is not charged in the middle, so that the smart pen 100 is powered down when in use, and the teaching progress is affected. Based on the spaced power supply system 300 provided by the application, a teacher can perform spaced charging on the intelligent pen 100 through the spaced power supply device 200 in the process of using the intelligent pen 100, so that the intelligent pen 100 is always in a state with sufficient electric quantity. The teaching space may be a classroom. In addition, the space charge is performed based on the magnetic resonance technology, and even if people are more in a classroom space, electromagnetic wave signals in the space can bypass the barrier to reach the intelligent pen 100, so that even if people or other objects are shielded, the power supply to the intelligent pen 100 is not affected.

In some embodiments, the space-saving power supply device 200 may be an electronic blackboard, that is, by setting the circuit in the space-saving power supply device 200 in the electronic blackboard, an electronic blackboard that can charge the smart pen 100 in a space-saving manner may be obtained. Alternatively, the spaced power supply 200 may be a device dedicated to supplying power to the smart pen 100.

It is understood that the above implementation scenario is merely an example, and in addition, the smart pen 100, the spaced power supply device 200, and the spaced power supply system 300 of the present application may be applied to any scenario using the smart pen 100, such as a conference scenario.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical, or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing description is only exemplary embodiments of the present application and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims (10)

1. The utility model provides an intelligent pen that can separate empty charge, its characterized in that includes load element, receiving circuit, rectifier circuit and voltage regulation circuit, wherein, rectifier circuit is connected receiving circuit, voltage regulation circuit connects rectifier circuit with load element, receiving circuit includes at least one receiving coil, receiving coil matches with the resonant frequency of the transmitting coil in the power supply unit that separates empty, transmitting coil is used for converting electric energy into magnetic energy, receiving coil is used for converting the magnetic energy in the environment into the signal of telecommunication.

2. The smart pen according to claim 1, further comprising a filter circuit, wherein one end of the filter circuit is connected to the receiving circuit, and the other end of the filter circuit is connected to the rectifying circuit, and is configured to filter the electric signal generated by the receiving circuit, and input the filtered electric signal to the rectifying circuit.

3. The smart pen of claim 1, further comprising a power sensor and a receiving communication circuit;

the electric quantity sensor is used for detecting the residual electric quantity of the intelligent pen;

the receiving communication circuit is used for sending a power supply instruction to a spaced power supply device where the transmitting coil is located, so that the spaced power supply device controls the transmitting coil to generate a magnetic field.

4. The smart pen of claim 3, further comprising a controller, the controller being respectively connected to the receiving circuit, the rectifying circuit, the voltage regulating circuit, the power sensor, and the receiving communication circuit, the receiving circuit, the rectifying circuit, the voltage regulating circuit, the power sensor, and the receiving communication circuit operating under control instructions of the controller.

5. The smart pen of claim 1, wherein the rectifying circuit is a diode rectifier or a full-wave rectifying circuit composed of four field effect transistors;

and/or the voltage regulating circuit comprises at least one of a linear voltage regulator and a voltage converter.

6. The air-insulated power supply device is characterized by comprising a power supply circuit, a controller, a driving circuit, an inverter circuit and a transmitting circuit connected with the inverter circuit, wherein the transmitting circuit comprises at least one transmitting coil, and the transmitting coil is matched with the resonance frequency of a receiving coil of a smart pen;

the power supply circuit is used for providing a power supply signal, the controller is used for outputting a control signal based on the power supply signal, the driving circuit is used for generating a driving signal based on the control signal, the inverter circuit is used for generating an alternating current electric signal based on the driving signal, and the transmitting circuit is used for converting electric energy of the alternating current electric signal into magnetic energy.

7. The spaced apart power supply device of claim 6, wherein,

the space-apart power supply device further comprises a frequency adjusting circuit, wherein the frequency adjusting circuit is positioned between the transmitting circuit and the inverter circuit and is used for adjusting the vibration frequency of the transmitting coil in the transmitting circuit.

8. The isolated power supply unit as claimed in claim 6, further comprising a current detection circuit and at least two inverter circuits connected to the controller, wherein the transmitter circuits include at least two transmitter coils, the inverter circuits are connected to the transmitter coils in a one-to-one correspondence, the current detection circuit is used for detecting a current value in the inverter circuits, the controller is used for controlling the inverter circuit with the largest current value to enter a conducting state, and the rest inverter circuits enter a cut-off state.

9. The spaced apart power supply device of claim 6, further comprising a transmit communication circuit coupled to the controller, the transmit communication circuit configured to receive a power command sent by the smart pen, the controller configured to control the spaced apart power supply device to enter a spaced apart power supply state based on the power command.

10. A space-efficient power supply system, comprising: a smart pen capable of off-air charging as claimed in any one of claims 1 to 5 and an off-air power supply as claimed in any one of claims 6 to 9.