Communication circuit and communication device

Abstract

The utility model provides a communication circuit and a communication device. The communication circuit comprises a control module, a serial port conversion module and a first interface. The control module is connected with the serial port conversion module, the control module is further in communication connection with the electronic equipment, the serial port conversion module is connected with the first interface, and the first interface is further connected with the display equipment. Specifically, the control module is used for generating a full charging level signal based on a full charging signal when the full charging signal sent by the electronic equipment is received; the serial port conversion module is used for converting the full charge level signal to obtain a full charge voltage signal; and the first interface is used for transmitting the full charging voltage signal to the display equipment, so that the display equipment displays the information that the electronic equipment is fully charged. According to the communication circuit and the communication device provided by the invention, a clear signal transmission path and a conversion mechanism are provided, so that the full charging information of the electronic equipment can be reliably transmitted to the display equipment, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power electronics, and particularly relates to a communication circuit and a communication device. BACKGROUND

[0002] At present, the front-mounted vehicle wireless charger on the market can only support mobile phone charging, but cannot display the full-charge state of the mobile phone on the large screen of the vehicle machine.

[0003] The user cannot intuitively obtain the mobile phone charging state from the large screen of the vehicle machine during driving. This makes the user need to frequently pick up the mobile phone to check the charging condition, thereby increasing the risk of driving distraction, which is a very dangerous behavior during driving. For example, during long-distance driving, the user may worry about whether the mobile phone is fully charged, and thus has to divert his / her eyesight to check the mobile phone, thereby ignoring the road conditions. CONTENT OF THE UTILITY MODEL

[0004] The application embodiment provides a communication circuit and a communication device, which can reliably transmit the full-charge information of an electronic device to a display device, and improve the user experience.

[0005] In a first aspect, the application embodiment provides a communication circuit, comprising: a control module, a serial port conversion module, and a first interface; the control module is connected with the serial port conversion module, the control module is further connected in communication with an electronic device, the serial port conversion module is connected with the first interface, and the first interface is further connected with a display device; the control module is configured to generate a full-charge level signal based on a full-charge signal sent by the electronic device when the full-charge signal is received; the serial port conversion module is configured to convert the full-charge level signal to obtain a full-charge voltage signal; and the first interface is configured to transmit the full-charge voltage signal to the display device, so that the display device displays information that the electronic device is fully charged.

[0006] In some embodiments, the serial port conversion module comprises a first conversion unit, the first conversion unit comprises a switch tube Q19, a diode D20, a resistor R183, a resistor R184, a resistor R185, and a resistor R186; the negative electrode of the diode D20 is connected with the first interface, the positive electrode of the diode D20 is connected with the first end of the resistor R183 and the second end of the resistor R184 respectively, the first end of the resistor R184 is connected with a power supply, the second end of the resistor R183 is connected with the first end of the resistor R185 and the control end of the switch tube Q19 respectively, the first end of the switch tube Q19 is connected with the second end of the resistor R185 and grounded, the second end of the switch tube Q19 is connected with the second end of the resistor R186 and the control module respectively, and the first end of the resistor R186 is connected with the power supply.

[0007] In some embodiments, the serial port conversion module further comprises a second conversion unit, the second conversion unit comprising a switch tube Q20, a resistor R187, a resistor R188, a resistor R189; the first end of the switch tube Q20 is connected with the second end of the resistor R187 and the first interface respectively, the first end of the resistor R187 is connected with a power supply, the second end of the switch tube Q20 is connected with the resistor R188 and grounded, the control end of the switch tube Q20 is connected with the first end of the resistor R188 and the first end of the resistor R189 respectively, the second end of the resistor R189 is connected with the control module.

[0008] In some embodiments, the serial port conversion module further comprises a diode D21; the positive electrode of the diode D21 is connected with the first end of the resistor R186, the negative electrode of the diode D21 is connected with the first end of the resistor R184 and the first end of the resistor R187 respectively.

[0009] In some embodiments, the serial port conversion module further comprises an ESD diode D22; the first end of the ESD diode D22 is connected with the negative electrode of the diode D20, the second end of the ESD diode D22 is connected with the first end of the switch tube Q20, and the third end of the ESD diode D22 is grounded.

[0010] In some embodiments, the first interface comprises an interface J9, a resistor FB19, a resistor FB20; the third pin of the interface J9 is connected with the serial port conversion module through the resistor FB20, and the fourth pin of the interface J9 is connected with the serial port conversion module through the resistor FB19.

[0011] In some embodiments, the first interface further comprises a resistor FB18; the eighth pin of the interface J9 is connected with a power supply through the resistor FB18.

[0012] In some embodiments, the control module comprises a chip U12; the fifth pin of the chip U12 is connected with the serial port conversion module, and the eighth pin of the chip U12 is connected with the serial port conversion module.

[0013] In some embodiments, the model of the chip U12 is GPM32F9019D.

[0014] In a second aspect, the embodiments of the present application provide a communication device, comprising the communication circuit as described above.

[0015] Different from the prior art, the embodiment of the application provides a communication circuit and a communication device. The communication circuit comprises a control module, a serial port conversion module and a first interface. The control module is connected with the serial port conversion module, the control module is further connected with an electronic device in communication, the serial port conversion module is connected with the first interface, and the first interface is further connected with a display device. Specifically, the control module is configured to generate a fullness level signal based on a fullness signal when the fullness signal sent by the electronic device is received; the serial port conversion module is configured to convert the fullness level signal to obtain a fullness voltage signal; and the first interface is configured to transmit the fullness voltage signal to the display device, so that the display device displays information that the electronic device is full. The communication circuit and the communication device provided by the embodiment of the application provide a clear signal transmission path and a conversion mechanism, so that the fullness information of the electronic device can be reliably transmitted to the display device, thereby improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and not intended to be limiting of the embodiments, and in which like reference numerals designate similar items in the figures, and wherein the drawings provided herein are not necessarily drawn to scale.

[0017] Figure 1 is a structural block diagram of the communication circuit provided by some embodiments of the application;

[0018] Figure 2 is a structural schematic diagram of the first interface provided by some embodiments of the application;

[0019] Figure 3 is a structural block diagram of the serial port conversion module provided by some embodiments of the application;

[0020] Figure 4 is a structural schematic diagram of the serial port conversion module provided by some embodiments of the application;

[0021] Figure 5 is a structural schematic diagram of the control module provided by some embodiments of the application. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described below in detail with reference to the accompanying drawings of the embodiments of the application. Obviously, the described embodiments are some but not all of the embodiments of the application. It should be understood that the specific embodiments described herein are only used to explain the application and not used to limit the application.

[0023] The technical features described in the various embodiments of the present application below can be combined with each other without conflict.

[0024] When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present.

[0025] The terms "first", "second", and the like in the description and claims of the present application are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the present application described herein are capable of operation in other sequences than those described or otherwise suggested herein. The term "comprising", used in the description and claims of the present application, should not be interpreted as limited to the elements or steps listed thereafter, but rather should be read to mean one or more elements or steps or any subgroup combination thereof.

[0026] Please refer to Figure 1 , Figure 1 is a structural block diagram of the communication circuit 100 provided by some embodiments of the present application.

[0027] The embodiments of the present application provide a communication circuit 100, which comprises a control module 30, a serial port conversion module 20 and a first interface 10. The control module 30 is connected with the serial port conversion module 20, and the control module 30 is further connected with an electronic device 200 in communication. The serial port conversion module 20 is connected with the first interface 10, and the first interface 10 is further connected with a display device 300.

[0028] Specifically, the control module 30 is configured to generate a fullness level signal based on a fullness signal when the fullness signal is received from the electronic device 200. The serial port conversion module 20 is configured to convert the fullness level signal to obtain a fullness voltage signal. The first interface 10 is configured to transmit the fullness voltage signal to the display device 300, so that the display device 300 displays information that the electronic device 200 is full.

[0029] The fullness signal is a signal carrying the information of "fullness" generated by the electronic device 200 when its battery charging reaches the saturation state. It is generated by the charging management system or related monitoring circuit inside the electronic device 200 according to certain charging judgment conditions, such as when the voltage of the battery reaches the rated full voltage, the charging current drops to a minimum value, etc. to meet the conditions of charging completion, which will trigger the generation of the signal. The electronic device 200 can send the fullness signal to the control module 30 through wireless communication, and the specific wireless communication technology may have multiple cases. For example, it may use Bluetooth communication technology, and encapsulate the "fullness" information according to the specific format specified by the Bluetooth protocol; it may also be based on Wi-Fi communication, and carry the information in the form of a data frame conforming to the Wi-Fi communication standard. The signal format can be a digital signal form, such as a specific binary code to represent the fullness state (such as "1001" representing fullness), or an analog signal modulated and transmitted in the air, such as using frequency modulation to modulate the low-frequency analog signal representing the fullness state to a high-frequency carrier signal for wireless transmission.

[0030] Regarding the fullness level signal, after the control module 30 receives the fullness signal sent by the electronic device 200, it will process it and generate a fullness level signal. This process involves demodulation of the wireless signal (if it is an analog modulated signal), decoding (if it is a digitally encoded signal), etc. operations, which convert the received original fullness signal into a signal conforming to the logic level standard of the internal circuit of the control module 30. For example, the control module 30 internally uses the TTL level standard (the logic "1" corresponds to a voltage range of about 2V to 5V, and the logic "0" corresponds to a voltage range of about 0V to 0.8V), so the parsed fullness information will be re-expressed according to this level standard to form a fullness level signal, so that it can be smoothly transmitted in the control module 30 and subsequent connection with the serial conversion module 20. The fullness level signal is essentially an intermediate transition signal, mainly used to adapt the level requirements between different modules in the communication circuit. It is transmitted between the control module 30 and the serial conversion module 20 according to the established circuit connection and communication protocol, laying the foundation for further conversion and transmission of the fullness information to the display device 300.

[0031] As to the fullness voltage signal, the serial port conversion module 20 receives the fullness level signal transmitted by the control module 30, and then converts the fullness level signal according to the voltage requirement of the input signal of the display device 300, so as to obtain the fullness voltage signal. For example, the display driving circuit of the display device 300 requires a direct current voltage signal with an amplitude of 3V to 5V to trigger the icon or text prompt indicating that the electronic device 200 is fully charged. The serial port conversion module 20 converts the fullness level signal (which may be a high-low level change signal conforming to the internal level standard of the control module 30) into the fullness voltage signal conforming to the input requirement of the display device 300 through voltage amplification and other circuit means. The fullness voltage signal is finally transmitted to the display device 300 through the first interface 10, so as to drive the corresponding display component (such as the LED indicator light, the LCD screen displaying the text indicating that the charging is full, etc.) of the display device 300, thereby directly showing the user the state information that the electronic device 200 is fully charged, and realizing the function of transmitting and displaying the charging state of the entire communication circuit.

[0032] Referring to Figure 2 , Figure 2 FIG. 1 is a structural schematic diagram of the first interface 10 provided by some embodiments of the present application.

[0033] In some embodiments, the first interface 10 comprises an interface J9, a resistor FB19, and a resistor FB20. The third pin (the numeral 3 in Figure 2 ) of the interface J9 is connected to the serial port conversion module 20 through the resistor FB20, and the fourth pin (the numeral 4 in Figure 2 ) of the interface J9 is connected to the serial port conversion module 20 through the resistor FB19.

[0034] The interface J9 can be a connector with a model number of TE-34825160.

[0035] In some embodiments, the first interface 10 further comprises a resistor FB18.

[0036] The eighth pin (the numeral 8 in Figure 2 ) of the interface J9 is connected to the power supply (VDD in Figure 2 ) through the resistor FB18.

[0037] In the present embodiment, the third pin and the fourth pin of the interface J9 are used to transmit the fullness voltage signal converted by the serial port conversion module 20.

[0038] The first interface 10 is also used to connect the display device 300, so as to transmit the fullness voltage signal in the communication circuit 100 to the display device 300, thereby realizing the display function of the charging state of the electronic device 200.

[0039] Referring to Figure 3 , Figure 3is a structural block diagram of a serial port conversion module provided by some embodiments of the present application.

[0040] In some embodiments, the serial port conversion module comprises a first conversion unit 21 and a second conversion unit 22.

[0041] The first conversion unit 21 is a circuit module for level conversion or signal conditioning. It is mainly used to process the signal from the first interface 10 and convert it into a form suitable for the control module 30 to receive.

[0042] The second conversion unit 22 is also a circuit unit for signal conversion, which processes the signal from the first interface 10 and converts it into a suitable signal that the control module 30 can receive.

[0043] Please refer to Figure 4 , Figure 4 is a structural diagram of the serial port conversion module 20 provided by some embodiments of the present application.

[0044] In some embodiments, the first conversion unit 21 comprises a switch tube Q19, a diode D20, a resistor R183, a resistor R184, a resistor R185, and a resistor R186. The negative electrode of the diode D20 is connected to the first interface 10, the positive electrode of the diode D20 is connected to the first end of the resistor R183 and the second end of the resistor R184, the first end of the resistor R184 is connected to the power supply, the second end of the resistor R183 is connected to the first end of the resistor R185 and the control end of the switch tube Q19, the first end of the switch tube Q19 is connected to the second end of the resistor R185 and grounded, the second end of the switch tube Q19 is connected to the second end of the resistor R186 and the control module 30, and the first end of the resistor R186 is connected to the power supply.

[0045] The switch tube Q19 can be an NPN triode or any other suitable switching device, which is not limited here. If the switch tube Q19 is an NPN triode, the control end of the switch tube Q19 is the base of the NPN triode, the first end of the switch tube Q19 is the emitter of the NPN triode, and the second end of the switch tube Q19 is the collector of the NPN triode.

[0046] In some embodiments, the second conversion unit 22 comprises a switch tube Q20, a resistor R187, a resistor R188, and a resistor R189. The first end of the switch tube Q20 is connected to the second end of the resistor R187 and the first interface 10, the first end of the resistor R187 is connected to the power supply, the second end of the switch tube Q20 is connected to the resistor R188 and grounded, the control end of the switch tube Q20 is connected to the first end of the resistor R188 and the first end of the resistor R189, and the second end of the resistor R189 is connected to the control module 30.

[0047] The switch tube Q20 can be an NPN triode or any other suitable switching device, which is not limited herein. If the switch tube Q20 is an NPN triode, the control end of the switch tube Q20 is the base of the NPN triode, the first end of the switch tube Q20 is the collector of the NPN triode, and the second end of the switch tube Q20 is the emitter of the NPN triode.

[0048] In some embodiments, the serial port conversion module 20 further comprises a diode D21. The positive electrode of the diode D21 is connected with the first end of the resistor R186, and the negative electrode of the diode D21 is connected with the first end of the resistor R184 and the first end of the resistor R187 respectively.

[0049] The diode D21 is used to reduce the reverse current and reduce the mutual interference between the power supplies.

[0050] In some embodiments, the serial port conversion module 20 further comprises an ESD diode D22. The first end of the ESD diode D22 is connected with the negative electrode of the diode D20, the second end of the ESD diode D22 is connected with the first end of the switch tube Q20, and the third end of the ESD diode D22 is grounded.

[0051] The ESD (electrostatic discharge) diode D22 is mainly used to protect the circuit from electrostatic discharge.

[0052] The working principle of the serial port conversion module 20 will be described below. Figure 4 The working principle of the serial port conversion module 20 will be described below.

[0053] When the display device 300 is the sending end and the control module 30 is the receiving end, the communication principle of the two through the serial port conversion module 20 is as follows:

[0054] When the TX end (the display device 300 end) is a negative voltage, the logic of the display device 300 (RS232 level) at this time is 1, and obviously Q19 is in the cutoff state at this time. The level of the UARTRX end (i.e. the control module 30 end) is equal to the power supply VDD (for example, +5V voltage), that is, it is logic 1. When the TX end (i.e. the display device 300 end) is a positive voltage, the logic of the display device 300 at this time is 0, and obviously Q19 is in the on state. The potential of the UARTRX end (i.e. the control module 30 end) is 0, which is also logic 0.

[0055] When the display device 300 is the receiving end and the control module 30 is the receiving end, the communication principle of the two through the serial port conversion module 20 is as follows:

[0056] When the UARTTX end (i.e. the end of the control module 30) is low, the switch tube Q20 is cut off, at which time the voltage of the RX end (i.e. the end of the display device 300) is the same as the power V_VDD (for example, 5V), which is also a logic 0. When the UARTTX end (i.e. the end of the control module 30) is high, at this time the switch tube Q20 is turned on, and the logic of the RX end is 1.

[0057] Please refer to Figure 5 , Figure 5 is a structural schematic diagram of the control module 30 provided by some embodiments of the present application.

[0058] In some embodiments, the control module 30 includes a chip U12. Among them, the fifth pin of the chip U12 is connected with the serial port conversion module 20, and the eighth pin of the chip U12 is connected with the serial port conversion module 20. The control chip U12 interacts with the serial port conversion module 20 through the fifth pin and the eighth pin, receives signals from the serial port conversion module 20 and sends signals to the serial port conversion module 20.

[0059] In some embodiments, the model of the chip U12 is GPM32F9019D.

[0060] After receiving the fullness signal sent by the electronic device 200, the control module 30 (chip U12) will process the signal. Specifically, it will decode, parse and other operations on the signal to understand the "fullness" information carried by the signal. For example, if the fullness signal is a modulated digital signal, the processor inside the chip U12 will demodulate and decode the signal according to the predetermined communication protocol, and convert it into an internal recognizable digital code, so as to determine that the electronic device 200 is full.

[0061] The control module 30 is also used to generate a fullness level signal based on the fullness signal when the fullness signal is received. The chip U12 will convert the parsed fullness information into a fullness level signal that meets its own level standard (for example, a certain digital logic level such as TTL level) according to the internal logic circuit and program (if it is a programmable chip), and then send the level signal to the serial port conversion module 20 through the pin (such as the fifth pin and the eighth pin) for subsequent signal conversion and transmission.

[0062] The embodiment of the application provides a communication circuit, comprising: a control module, a serial port conversion module and a first interface.

[0063] The communication circuit provides a clear signal transmission path and conversion mechanism, so that the fullness information of the electronic device can be reliably transmitted to the display device. By accurately displaying the fullness information of the electronic device on the display device, the user can intuitively understand the charging state of the electronic device without needing to judge whether the charging is completed through other complex ways (such as checking the charging indicator light of the electronic device). This improves the convenience of the user to obtain information, enhances the monitoring ability of the user to the charging process, and thus improves the user experience.

[0064] The embodiment of the application provides a communication device, which comprises the communication circuit 100.

[0065] In some embodiments, the communication device is wiredly connected with the display device to communicate, and the communication device is wirelessly connected with the electronic device to communicate.

[0066] The structure and working principle of the communication circuit 100 can refer to the above-mentioned embodiments, which will not be repeated here.

[0067] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; under the idea of the application, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes of different aspects of the application as described above; in order to be brief, they are not provided in details; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A communication circuit, characterized by, The application relates to a control module, a serial port conversion module and a first interface. The control module is connected with the serial port conversion module, the control module is further connected with an electronic device, the serial port conversion module is connected with the first interface, and the first interface is further connected with a display device. The control module is used for generating a fullness level signal based on a fullness signal when the fullness signal sent by the electronic device is received. The serial port conversion module is used for converting the fullness level signal to obtain a fullness voltage signal. The first interface is used for transmitting the fullness voltage signal to the display device, so that the display device displays information that the electronic device is full. The serial port conversion module comprises a first conversion unit, the first conversion unit comprises a switch tube Q19, a diode D20, a resistor R183, a resistor R184, a resistor R185 and a resistor R186.

2. The communication circuit of claim 1, wherein The negative electrode of the diode D20 is connected with the first interface, the positive electrode of the diode D20 is connected with the first end of the resistor R183 and the second end of the resistor R184 respectively, the first end of the resistor R184 is connected with a power supply, the second end of the resistor R183 is connected with the first end of the resistor R185 and the control end of the switch tube Q19 respectively, the first end of the switch tube Q19 is connected with the second end of the resistor R185 and grounded, the second end of the switch tube Q19 is connected with the second end of the resistor R186 and the control module respectively, and the first end of the resistor R186 is connected with the power supply. The serial port conversion module further comprises a second conversion unit, the second conversion unit comprises a switch tube Q20, a resistor R187, a resistor R188 and a resistor R189.

3. The communication circuit of claim 2, wherein, The first end of the switch tube Q20 is connected with the second end of the resistor R187 and the first interface respectively, the first end of the resistor R187 is connected with a power supply, the second end of the switch tube Q20 is connected with the resistor R188 and grounded, the control end of the switch tube Q20 is connected with the first end of the resistor R188 and the first end of the resistor R189 respectively, and the second end of the resistor R189 is connected with the control module. The serial port conversion module further comprises a diode D21.

4. The communication circuit of claim 3, wherein The positive electrode of the diode D21 is connected with the first end of the resistor R186, and the negative electrode of the diode D21 is connected with the first end of the resistor R184 and the first end of the resistor R187 respectively. The serial port conversion module further comprises an ESD diode D22.

5. The communication circuit of claim 4, wherein, The first end of the ESD diode D22 is connected with the negative electrode of the diode D20, the second end of the ESD diode D22 is connected with the first end of the switch tube Q20, and the third end of the ESD diode D22 is grounded. The first interface comprises an interface J9, a resistor FB19 and a resistor FB20.

6. The communication circuit of claim 1, wherein The third pin of the interface J9 is connected with the serial port conversion module through the resistor FB20, and the fourth pin of the interface J9 is connected with the serial port conversion module through the resistor FB19. The first interface further comprises a resistor FB18.

7. The communication circuit of claim 6, wherein, ​ The eighth pin of the interface J9 is connected with the power supply through the resistor FB18.

8. The communication circuit according to any one of claims 1 to 7, wherein The control module comprises a chip U12. The fifth pin of the chip U12 is connected with the serial port conversion module, and the eighth pin of the chip U12 is connected with the serial port conversion module.

9. The communication circuit of claim 8, wherein, The model of the chip U12 is GPM32F9019D.

10. A communication device, comprising: A communication circuit comprising any one of claims 1 to 9.

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