Signal transmission circuit and refrigerator

Abstract

The embodiment of the invention belongs to the signal transmission technology, and provides a signal transmission circuit and a refrigerator. The signal transmission circuit comprises a sending module, a signal transmission line, a receiving module, an adjusting module and a signal processing module. The adjusting module comprises a power supply unit and a comparison unit, the receiving module is connected with the first end of the comparison unit, and the second end of the comparison unit is connected with the power supply unit; the sending module is used for sending the target signal of the first amplitude or the second amplitude to the receiving module through the signal transmission line; the first amplitude is greater than the second amplitude; the power supply unit is used for providing a first amplitude for the second end of the comparison unit; the comparison unit is used for outputting a target instruction to the signal processing module in response to the fact that the amplitude of the target signal output by the receiving module is a third amplitude; the target instruction is used for indicating that the amplitude of the target signal sent by the sending module is the first amplitude, and the third amplitude is the amplitude after the first amplitude is attenuated. According to the invention, the accuracy of signal transmission can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to signal transmission technology, and more specifically, to a signal transmission circuit and a refrigerator. Background Art

[0002] Serial communication typically requires transmission lines to transmit serial signals. Because transmission lines inherently have a certain resistance, and the longer the line, the greater the resistance, the signal amplitude will be affected by the line resistance over long distances, resulting in reduced signal amplitude. Consequently, in scenarios where different signals with varying amplitudes are transmitted, long-distance signal transmission can cause attenuation of the signal amplitude received by the receiving end, leading to signal transmission errors. Summary of the Invention

[0003] The exemplary embodiments of the present application provide a signal transmission circuit and a refrigerator, which can improve the accuracy of signal transmission.

[0004] In a first aspect, the present application provides a signal transmission circuit, comprising: a sending module, a signal transmission line, a receiving module, an adjustment module, and a signal processing module; the adjustment module comprising: a power supply unit and a comparison unit, the sending module being connected to a first end of the receiving module via the signal transmission line, a second end of the receiving module being connected to a first end of the comparison unit, a second end of the comparison unit being connected to a power supply unit, and a third end of the comparison unit being connected to the signal processing module;

[0005] The sending module is configured to send a target signal of a first amplitude or a second amplitude to the receiving module through the signal transmission line; the first amplitude is greater than the second amplitude;

[0006] The receiving module is configured to output the received target signal to the comparing unit;

[0007] The power supply unit is configured to provide the first amplitude to the second terminal of the comparison unit;

[0008] The comparison unit is used to output a target instruction to the signal processing module in response to the amplitude of the target signal output by the receiving module being the third amplitude; the target instruction is used to indicate that the amplitude of the target signal sent by the sending module is the first amplitude, and the third amplitude is the amplitude of the first amplitude after attenuation by the signal transmission line.

[0009] In some embodiments, the fourth terminal of the comparison unit is a supply voltage receiving terminal of the comparison unit, and the fifth terminal of the comparison unit is grounded;

[0010] The comparison unit is specifically configured to output the power supply voltage of the comparison unit to the signal processing module in response to the amplitude of the target signal output by the receiving module being a third amplitude; the power supply voltage is the target instruction.

[0011] In some embodiments, the signal transmission circuit further includes: an impedance isolation module; the second end of the receiving module is connected to the first end of the comparison unit through the impedance isolation module;

[0012] The impedance isolation module is used to perform impedance isolation between the receiving module and the signal processing module.

[0013] In some embodiments, the impedance isolation module is a voltage follower; the first end of the voltage follower is connected to the second end of the receiving module, the second end of the voltage follower is the power supply voltage receiving end of the voltage follower, the third end of the voltage follower is connected to the first end of the comparison unit; the fourth end of the voltage follower is connected to the third end of the voltage follower, and the fifth end of the voltage follower is grounded.

[0014] In some embodiments, the adjustment module further includes: a switch unit, wherein a first end of the switch unit is connected to the first end of the comparison unit, a second end of the switch unit is connected to the third end of the comparison unit; a third end of the switch unit is connected to the first end of the comparison unit, and a fourth end of the switch unit is grounded;

[0015] The switch unit is configured to close when the amplitude of the target signal output by the receiving module is the second amplitude, so that the second amplitude is output to the signal processing module;

[0016] or,

[0017] The switch unit is configured to be disconnected when the amplitude of the target signal output by the receiving module is a third amplitude, so that the comparison unit outputs the target instruction to the signal processing module.

[0018] In some embodiments, the switching unit is a relay.

[0019] In some embodiments, the power supply unit is further configured to:

[0020] In response to the sending module being used to send a target signal of a fourth amplitude or the second amplitude to the receiving module through the signal transmission line, the fourth amplitude is provided to the second end of the comparison unit; the fourth amplitude is higher than the second amplitude.

[0021] In some embodiments, the power supply unit is further connected to the signal processing module;

[0022] The power supply unit is further configured to receive an amplitude indication instruction from the signal processing module; the amplitude indication instruction is configured to instruct the power supply unit to provide the fourth amplitude to the second end of the comparison unit.

[0023] In a second aspect, the present application provides a refrigerator comprising the signal transmission circuit as described in any one of the first aspects.

[0024] In some embodiments, the refrigerator includes: a display device, and a control device;

[0025] The display device includes: a sending module included in the signal transmission circuit; the control device includes: a receiving module, an adjusting module, and a signal processing module included in the signal transmission circuit.

[0026] The signal transmission circuit and refrigerator provided in the present application can transmit a target signal through the sending module 101, the signal transmission line 102, and the receiving module 103 in the signal transmission circuit. The power supply unit 201 can provide the comparison unit 202 with the first amplitude of the target signal before attenuation. When the first amplitude of the target signal attenuates to the third amplitude, the comparison unit 202 can output a target instruction for indicating that the amplitude of the target signal sent by the sending module is the first amplitude to the signal processing module 200, so that the signal processing module 200 can obtain the target instruction for indicating the target signal with unattenuated amplitude, thereby improving the accuracy of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the implementation methods in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 A schematic structural diagram of a signal transmission circuit provided in this application;

[0029] Figure 2 A schematic structural diagram of another signal transmission circuit provided in this application;

[0030] Figure 3 A schematic diagram of the structure of an adjustment module provided in this application;

[0031] Figure 4 A schematic diagram of the structure of another adjustment module provided in this application;

[0032] Figure 5 A schematic structural diagram of a refrigerator provided in this application;

[0033] Figure 6 A schematic structural diagram of another refrigerator provided in this application;

[0034] Figure 7 This is a schematic structural diagram of another refrigerator provided in this application. DETAILED DESCRIPTION

[0035] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0036] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0037] In addition, the terms "comprises" and "comprising" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0038] Serial communication typically requires a transmission line to transmit serial signals, and these lines can be long. For example, consider the transmission of serial signals between a refrigerator's display panel and main control board. Because the display panel is typically located on the refrigerator door, while the main control board is typically located on the back or in the refrigerator's press compartment, the distance between the display panel and the main control board is relatively long, requiring a long transmission line for serial communication between the two boards.

[0039] Because transmission lines inherently have a certain resistance, and the longer the line, the greater its resistance, the signal amplitude over long distances is affected by the line resistance, resulting in a reduction in signal amplitude. Consequently, in scenarios where different signals with varying amplitudes are transmitted, long-distance transmission over transmission lines can cause the signal amplitude received by the receiving end to attenuate, leading to signal transmission errors. Consequently, existing long-distance signal transmission suffers from poor accuracy.

[0040] In view of the above-mentioned problems existing in the existing signal transmission method, the present application proposes a signal transmission circuit that compensates for the amplitude of the received signal to improve the accuracy of signal transmission.

[0041] The following detailed description of the technical solution of the present application is provided in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0042] Figure 1 This is a schematic diagram of the structure of a signal transmission circuit provided by this application. Figure 1 As shown, the signal transmission circuit 100 may include: a sending module 101, a signal transmission line 102, a receiving module 103, an adjustment module 104, and a signal processing module 200. The adjustment module 104 may include: a power supply unit 201, and a comparison unit 202.

[0043] The transmitting module 101 can be connected to a first end of the receiving module 103 via a signal transmission line 102. A second end of the receiving module 103 can be connected to a first end of the comparing unit 202. A second end of the comparing unit 202 can be connected to a power supply unit 201. A third end of the comparing unit 202 can be connected to the signal processing module 200.

[0044] Optionally, the sending module 101, signal transmission line 102, and receiving module 103 can refer to any existing signal transmission method, and this application is not limited to this. For example, the sending module 101, signal transmission line 102, and receiving module 103 can be a sending module, signal transmission line, and receiving module in a serial communication method. In some embodiments, the sending module 101 and receiving module 103 can also be referred to as connectors. Taking the example of the sending module 101 being deployed on the display panel of the refrigerator, the sending module 101 can be referred to as a display panel connector, for example. Taking the example of the receiving module 102 being deployed on the main control board of the refrigerator, the receiving module 103 can be referred to as a main control board connector, for example.

[0045] The transmitting module 101 can be configured to transmit a target signal having a first amplitude or a second amplitude to the receiving module 103 via the signal transmission line 102. The first amplitude is greater than the second amplitude. In some embodiments, the first amplitude can also be referred to as a high level, and the second amplitude can also be referred to as a low level. The receiving module 103 can be configured to output the received target signal to the comparison unit 202.

[0046] The power supply unit 201 may be configured to provide the first amplitude to the second terminal of the comparison unit 202. By providing the first amplitude to the second terminal of the comparison unit 202, the adjustment module 104 may obtain the first amplitude through the comparison unit 202.

[0047] The comparison unit 202 may be configured to output a target instruction to the signal processing module 200 in response to the amplitude of the target signal output by the receiving module 103 being a third amplitude. The third amplitude is the amplitude of the first amplitude after attenuation by the signal transmission line.

[0048] The target instruction may be used to instruct the sending module 101 to send a target signal having a first amplitude. The first amplitude, namely the initial amplitude of the target signal sent by the sending module 101, is the amplitude before attenuation by the signal transmission line 102.

[0049] In some embodiments, the fourth terminal of the comparison unit 202 is a supply voltage receiving terminal for the comparison unit 202, and the fifth terminal of the comparison unit 202 can be grounded. Optionally, the comparison unit 202 can be configured to output a supply voltage for the comparison unit to the signal processing module in response to the amplitude of the target signal output by the receiving module 103 being a third amplitude. The supply voltage can be the target instruction.

[0050] For example, the comparison unit 202 may be a comparator or any other existing component having comparator functionality, and this application is not limited thereto. Taking the comparison unit 202 as an example, the first terminal of the comparison unit 202 may be, for example, the positive terminal of the comparator. The second terminal of the comparison unit 202 may be, for example, the negative terminal of the comparator. The third terminal of the comparison unit 202 may be, for example, the output terminal of the comparator.

[0051] For example, in the case where the sending module 101 transmits alternating high-level (e.g., representing 1) and low-level (e.g., representing 0) signals to the receiving module 103 via the signal transmission line 102 to represent serial port information, the first amplitude can be a high level. The third amplitude of the target signal is the amplitude of the target signal transmitted by the sending module 101 after the amplitude of the target signal is attenuated by the signal transmission line 102.

[0052] The third amplitude of the above-mentioned target signal is smaller than the first amplitude, which indicates that the target signal has experienced amplitude attenuation during transmission through the signal transmission line 102. The adjustment module 104 can then output a target instruction indicating that the amplitude of the target signal sent by the sending module 101 is the first amplitude, that is, a target instruction indicating that the amplitude has not been attenuated, to the signal processing module 200, thereby improving the accuracy of signal transmission.

[0053] The above-mentioned signal processing module 200 can be used to perform a corresponding target operation based on the target instruction. It should be understood that this application does not limit how the signal processing module 200 performs signal processing based on the target instruction. For example, taking the target signal of the first amplitude as a high-level signal as an example, the signal processing module 200 can, for example, determine the target content or target operation indicated by the signal based on subsequent and / or previously acquired high-level signals and / or low-level signals.

[0054] In this embodiment, the target signal can be transmitted through the transmitting module 101, the signal transmission line 102, and the receiving module 103 in the signal transmission circuit. The power supply unit 201 can provide the comparison unit 202 with the first amplitude of the target signal before attenuation. When the first amplitude of the target signal attenuates to a third amplitude, the comparison unit 202 can output a target instruction for indicating that the amplitude of the target signal sent by the transmitting module is the first amplitude to the signal processing module 200, so that the signal processing module 200 can obtain the target instruction for indicating the target signal with an unattenuated amplitude, thereby improving the accuracy of signal transmission.

[0055] Figure 2 This is a schematic diagram of another signal transmission circuit provided by this application. Figure 2 As shown, in some embodiments, the signal transmission circuit 100 may further include an impedance isolation module 301 , wherein the second end of the receiving module 103 may be connected to the first end of the comparison unit 202 via the impedance isolation module 301 .

[0056] The impedance isolation module 301 can be used to impedance isolate the receiving module 103 from the signal processing module 200. For example, if the amplitude of the target signal output by the transmitting module 101 is a first amplitude, by impedance isolating the receiving module 103 from the signal processing module 200, the amplitude of the target signal output by the receiving module 103 and the amplitude of the target signal received by the first end of the comparison unit 202 can both be a third amplitude.

[0057] Exemplarily, the impedance isolation module 301 may include any type of voltage follower. For example, if the impedance isolation module 301 is a voltage follower, the first end of the voltage follower may be connected to the second end of the receiving module. The second end of the voltage follower may be a supply voltage receiving end of the voltage follower. The third end of the voltage follower may be connected to the first end of the comparison unit 202. The fourth end of the voltage follower may be connected to the third end of the voltage follower. The fifth end of the voltage follower may be grounded.

[0058] For example, the first terminal of the voltage follower may be, for example, a positive terminal of the voltage follower, and the fourth terminal of the voltage follower may be, for example, a negative terminal of the voltage follower.

[0059] The impedance isolation module 301 can be used to perform impedance isolation between the receiving module 103 and the signal processing module 200, thereby eliminating the influence of the amplitude of the impedance transmitted from the signal processing module 200 to the comparison unit 202 and further improving the accuracy of the signal transmission.

[0060] Figure 3 This is a structural diagram of an adjustment module provided by this application. Figure 3 As shown, in some embodiments, the adjustment module 104 may further include: a switch unit 401 , wherein a first terminal of the switch unit 401 may be connected to a first terminal of the comparison unit 202 , and a second terminal of the switch unit 401 may be connected to a third terminal of the comparison unit 202 .

[0061] The switch unit 401 can be configured to close when the amplitude of the target signal output by the receiving module 103 is the second amplitude, so that the second amplitude is output to the signal processing module 200 .

[0062] The second amplitude is lower than the third amplitude. Taking the example of the sending module 101 sending interlaced high-level (e.g., representing 1) and low-level (e.g., representing 0) signals to the receiving module 103 via the signal transmission line 102 to represent serial port information, the third amplitude can be an attenuated high-level signal, and the second amplitude can be a low-level signal. Therefore, through the above method, when a low-level signal is transmitted, by closing the switch unit 401, the comparison unit 202 is short-circuited and does not work, and the receiving module 103 directly outputs the low-level signal to the signal processing module 200, thereby achieving the transmission of the low-level signal.

[0063] Alternatively, the switch unit 401 may also be configured to be disconnected when the amplitude of the target signal output by the receiving module is a third amplitude, so that the comparison unit 202 outputs the target instruction to the signal processing module 200 .

[0064] By disconnecting the switch unit 401, the comparison unit 202 is connected to the circuit to work, thereby achieving the transmission of the target instruction. Taking the first amplitude as a high-level signal as an example, the transmission of the high-level signal is achieved, thereby improving the accuracy of signal transmission.

[0065] Optionally, the third terminal of the switch unit 401 may also be connected to the first terminal of the comparison unit 202 ( Figure 3 (not shown), and the fourth end of the switch unit 401 can be grounded.

[0066] By connecting the third end of the switch unit 401 to the first end of the comparison unit 202 and the fourth end to the ground, the switch unit 401 is connected to the circuit loop, and the amplitude of the target signal of the first end of the comparison unit 202 (that is, the second end of the receiving module 103) can be obtained through the third end, which lays the foundation for the switch unit 401 to respond to amplitudes of different sizes and perform corresponding closing or opening.

[0067] Exemplarily, the switch unit 401 may be a relay.

[0068] By using the relay as the switch unit 401, the switch unit 401 can respond to the amplitude of the target signal at the first end of the comparison unit 202 (that is, the second end of the receiving module 103), and then respond to the amplitude to close or open accordingly, laying the foundation for realizing the transmission of target signals of different amplitudes.

[0069] Alternatively, the switch unit 401 may be any component capable of implementing a switch function, such as a transistor, a MOS transistor, etc., which is not limited in this application.

[0070] As another possible implementation, the power supply unit 201 may be further configured to, in response to the sending module 101 sending a target signal having a fourth amplitude or a second amplitude to the receiving module via the signal transmission line, provide the fourth amplitude to the second end of the comparison unit 202. The fourth amplitude is higher than the second amplitude.

[0071] In other words, the amplitude provided by the power supply unit 201 to the second terminal of the comparison unit 202 can be adjusted in response to the amplitude of the unattenuated target signal sent by the transmitting module 101. Through the above method, the signal transmission circuit 100 can ensure that attenuation does not occur when transmitting target signals of different amplitudes, thereby improving the flexibility of the signal transmission circuit 100.

[0072] In some embodiments, the power supply unit 201 may be connected to the signal processing module 200 to determine the fourth amplitude.

[0073] Figure 4 This is a structural diagram of another adjustment module provided by this application. Figure 4 As shown, for example, the power supply unit 201 may also be configured to receive an amplitude instruction from the signal processing module 200 , wherein the amplitude instruction may be configured to instruct the power supply unit 201 to provide a fourth amplitude to the second terminal of the comparison unit 202 .

[0074] Optionally, the amplitude indication instruction may be sent by the signal processing module 200 to the power supply unit 201 when the detected first amplitude of the target signal changes to the fourth amplitude. It should be understood that the present application does not limit how the signal processing module 200 determines whether the first amplitude of the target signal changes to the fourth amplitude.

[0075] For example, taking the signal transmission as serial port signal transmission, the first amplitude may be included in the serial port communication protocol preset for the serial port signal transmission. When the first amplitude in the serial port communication protocol changes to a fourth amplitude, the sending module 101 may send the serial port communication protocol to the signal processing module 200. The signal processing module 200 may then parse the serial port communication protocol to obtain the fourth amplitude, and send the amplitude indication instruction to the power supply unit 201, instructing the power supply unit 201 to provide the fourth amplitude to the second end of the comparison unit 202.

[0076] Through the above method, the power supply unit 201 can obtain the above amplitude indication instruction for instructing the power supply unit 201 to provide a fourth amplitude to the second end of the comparison unit 202 from the signal processing module 200, laying the foundation for flexibly adjusting the size of the amplitude provided to the second end of the comparison unit 202.

[0077] As another possible implementation, the adjustment module 104 may also be a module with a processing function. The adjustment module 104 may, for example, pre-store logic for comparing the first amplitude with the third amplitude, and pre-store the first amplitude of the target signal. The adjustment module 104 may, for example, obtain the first amplitude from its own stored data and compare the third amplitude with the first amplitude. When the third amplitude is less than the first amplitude, the target signal of the first amplitude is output to the signal processing module. Optionally, the adjustment module 104 may also include, for example, an analog-to-digital conversion unit (for converting the received analog target signal into a digital signal) and a digital-to-analog conversion module (for converting the digital signal into a corresponding analog signal).

[0078] The present application also provides a refrigerator, which may include the signal transmission circuit 100 as described in any of the above embodiments. The implementation principle and technical effects of the refrigerator provided by the present application are similar to those of the above signal transmission circuit 100, and will not be described in detail.

[0079] Figure 5 This is a schematic diagram of the structure of a refrigerator provided in this application. Figure 5 As shown, in some embodiments, the refrigerator may include, for example: a display device 300 and a control device 400.

[0080] The display device 300 may include, for example, the sending module 101 included in the aforementioned signal transmission circuit 100 . The control device 400 may include, for example, the aforementioned signal processing module 200 , as well as a receiving module 103 and an adjusting module 104 .

[0081] It should be understood that the present application does not limit the type of the display device 300 and the type of the signal processing module 200. For example, the display device 300 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a MiniLED, a MicroLED, a Micro-oLed, a quantum dot light-emitting diode (QLED), etc.

[0082] The signal processing module 200 can be a processor, or a general term for multiple processing elements, such as a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as: one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (Field Programmable Gate Array, FPGAs), or a microcontroller unit (Microcontroller Unit, MCU).

[0083] Through the above method, if the display device 300 and the control device 400 of the refrigerator perform long-distance signal transmission, the signal transmission circuit provided by the present application can avoid the attenuation of the target signal sent by the display device 300 to the control device 400, thereby improving the accuracy of signal transmission between the refrigerator display device 300 and the control device 400, thereby improving the accuracy of the refrigerator operation and improving the user experience.

[0084] For example, taking the impedance isolation module 301 as a voltage follower and the comparison unit 202 as a comparator, Figure 6This is a schematic diagram of another refrigerator structure provided by this application. Figure 6 As shown, the refrigerator can perform long-distance serial port signal transmission through the signal transmission circuit 100. The follower U3A is the above-mentioned impedance isolation module 301. The comparator 200 is the above-mentioned comparison unit 202. The voltage follower is used to stabilize the signal received by the main control MCU, and the comparator is used to keep the received voltage value consistent with the initial transmission value to improve the accuracy of signal reception. Figure 6 As shown, the follower U3A can also be connected to a voltage output terminal V4, which can provide a 15V operating voltage for the follower U3A. The main control microcontroller unit (MCU) can be the aforementioned signal processing module 200.

[0085] If by existing signal transmission method, the connector (sending module) of refrigerator display board, take high level as 3.3V as example, after arriving at main control board connector (receiving module) over a long distance, it is assumed that it is attenuated to 2.8V, signal amplitude attenuation, when the amplitude is attenuated to the serial port and cannot be detected as high level, it will be shown as receiving an error signal. In the present embodiment, by the signal transmission circuit 100 provided by the application, U3A is a voltage follower, and the cathode voltage of comparator U3B is consistent with the voltage of receiving module output terminal, avoiding forming a resistance divider with the receiving terminal input impedance behind and reducing the receiving voltage value of main control MCU. U3B is a comparator, and the voltage value of positive input terminal is the same as the point voltage value output by display board, for example, power supply voltage+5V or+3.3V. Comparator cathode voltage is lower than positive voltage, then the output of comparator is high level, finally making output voltage and output voltage of display board consistent, improve signal transmission accuracy.

[0086] Taking the adjustment module 104 including the switch unit 401, and the switch unit 401 being a relay as an example, Figure 7 This is a schematic diagram of the structure of another refrigerator provided by this application. Figure 7 As shown in the figure, if the positive terminal of comparator U3B is at a high level, relay S1 can be opened, so that the amplitude of the negative terminal of the comparator can be output to the main control MCU, realizing the transmission of high-level signals. If the positive terminal of the above comparator U3B is at a low level, relay S1 can be closed to short-circuit the comparator, and the receiving module can directly output the low-level signal to the main control MCU through follower U3A, realizing the transmission of low-level signals.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0088] For ease of explanation, the above description has been made with reference to specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments are selected and described to better explain the principles and practical applications, so that those skilled in the art can better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A signal transmission circuit, characterized in that: The signal transmission circuit includes: a sending module, a signal transmission line, a receiving module, an adjustment module, and a signal processing module; the adjustment module includes: a power supply unit and a comparison unit, the sending module is connected to a first end of the receiving module via the signal transmission line, the second end of the receiving module is connected to a first end of the comparison unit, the second end of the comparison unit is connected to the power supply unit, and the third end of the comparison unit is connected to the signal processing module; The sending module is configured to send a target signal of a first amplitude or a second amplitude to the receiving module through the signal transmission line; the first amplitude is greater than the second amplitude; The receiving module is configured to output the received target signal to the comparing unit; The power supply unit is configured to provide the first amplitude to the second terminal of the comparison unit; The comparison unit is used to output a target instruction to the signal processing module in response to the amplitude of the target signal output by the receiving module being the third amplitude; the target instruction is used to indicate that the amplitude of the target signal sent by the sending module is the first amplitude, and the third amplitude is the amplitude of the first amplitude after attenuation by the signal transmission line.

2. The signal transmission circuit according to claim 1, wherein: The fourth terminal of the comparison unit is a supply voltage receiving terminal of the comparison unit, and the fifth terminal of the comparison unit is grounded; The comparison unit is specifically configured to output the power supply voltage of the comparison unit to the signal processing module in response to the amplitude of the target signal output by the receiving module being a third amplitude; the power supply voltage is the target instruction.

3. The signal transmission circuit according to claim 1 or 2, characterized in that: The signal transmission circuit further includes: an impedance isolation module; the second end of the receiving module is connected to the first end of the comparison unit through the impedance isolation module; The impedance isolation module is used to perform impedance isolation between the receiving module and the signal processing module.

4. The signal transmission circuit according to claim 3, wherein: The impedance isolation module is a voltage follower; the first end of the voltage follower is connected to the second end of the receiving module, the second end of the voltage follower is the power supply voltage receiving end of the voltage follower, the third end of the voltage follower is connected to the first end of the comparison unit; the fourth end of the voltage follower is connected to the third end of the voltage follower, and the fifth end of the voltage follower is grounded.

5. The signal transmission circuit according to claim 1 or 2, characterized in that: The adjustment module further includes: a switch unit, wherein a first end of the switch unit is connected to the first end of the comparison unit, a second end of the switch unit is connected to the third end of the comparison unit; a third end of the switch unit is connected to the first end of the comparison unit, and a fourth end of the switch unit is grounded; The switch unit is configured to close when the amplitude of the target signal output by the receiving module is the second amplitude, so that the second amplitude is output to the signal processing module; or, The switch unit is configured to be disconnected when the amplitude of the target signal output by the receiving module is a third amplitude, so that the comparison unit outputs the target instruction to the signal processing module.

6. The signal transmission circuit according to claim 5, wherein: The switch unit is a relay.

7. The signal transmission circuit according to claim 1 or 2, characterized in that: The power supply unit is further used for: In response to the sending module being used to send a target signal of a fourth amplitude or the second amplitude to the receiving module through the signal transmission line, the fourth amplitude is provided to the second end of the comparison unit; the fourth amplitude is higher than the second amplitude.

8. The signal transmission circuit according to claim 7, wherein: The power supply unit is also connected to the signal processing module; The power supply unit is further configured to receive an amplitude indication instruction from the signal processing module; the amplitude indication instruction is configured to instruct the power supply unit to provide the fourth amplitude to the second end of the comparison unit.

9. A refrigerator, characterized in that: The refrigerator comprises the signal transmission circuit according to any one of claims 1 to 8.

10. The refrigerator according to claim 9, characterized in that The refrigerator includes: a display device, and a control device; The display device includes: a sending module included in the signal transmission circuit; the control device includes: a receiving module, an adjusting module, and a signal processing module included in the signal transmission circuit.

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