Circuit board of household appliances and household appliances

Abstract

The present disclosure provides a circuit board of a household appliance and the household appliance, wherein the circuit board comprises: a connection interface, which is used to connect to a controller of the household appliance through a physical connection line so as to transmit power, communication data and display instructions to the controller; a wireless communication module, which is respectively connected to the connection interface and a driver chip through printed circuits in the circuit board, and is used to transmit power and the communication data to the connection interface, obtain the display instructions from the connection interface, and send the display instructions to the driver chip; a driver chip, which is connected to the connection interface through printed circuits in the circuit board, and is used to obtain power from the connection interface and control the display screen of the household appliance to display according to the display instructions.

Description

Technical Field

[0001] The present disclosure relates to the technical field of household appliances, and in particular to a circuit board of a household appliance and the household appliance. Background Art

[0002] In recent years, there are more and more types of household appliances with more and more functions, such as air conditioners, electric fans, refrigerators, etc. These household appliances have display screens, wireless communication modules, etc. The display screens can display some parameters such as temperature and time, and the wireless communication modules can connect household appliances to the network to achieve data transmission. The driver chip of the display screen, the wireless communication module, etc. need to be connected to the main control board of the household appliance to realize their respective functions, which causes problems such as complex circuits, high production difficulty, and poor connection stability. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the embodiments of the present disclosure provide a circuit board of a household appliance and the household appliance, so as to solve the defects in the related art.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a circuit board of a household appliance, comprising:

[0005] A connection interface, used to connect to a controller of a household appliance through a physical connection line to transmit power, communicate data and display instructions to the controller;

[0006] A wireless communication module, connected to the connection interface and the driver chip through the printed circuits in the circuit board, for transmitting the communication data and electric energy to the connection interface, obtaining the display instruction from the connection interface, and sending the display instruction to the driver chip;

[0007] The driving chip is connected to the connection interface via the printed circuit in the circuit board, and is used to obtain electric energy from the connection interface and control the display screen of the household appliance to display according to the display instruction.

[0008] In one embodiment, the physical connection lines between the connection interface and the controller include a first power transmission line, a first ground line, a first signal sending line and a first signal receiving line, wherein the first power transmission line and the first ground line are used to transmit power between the controller and the connection interface, and the first signal sending line and the first signal receiving line are used to transmit communication data and display instructions between the controller and the connection interface.

[0009] In one embodiment, the printed circuit between the connection interface and the wireless communication module includes a second power transmission line and a second ground line, which are used to transmit power between the connection interface and the wireless communication module;

[0010] A current converter and a voltage regulator are provided on the second power transmission line, wherein the current converter is used to reduce the voltage of the power at the connection interface to a first voltage, and the voltage regulator is used to reduce the voltage of the power at the current converter from the first voltage to a second voltage.

[0011] In one embodiment, the printed circuit between the connection interface and the driver chip includes a third power transmission line and a third ground line, which are used to transmit power between the connection interface and the driver chip;

[0012] The third power transmission line is provided with a current converter, wherein the current converter is used to reduce the voltage of the power at the connection interface to a first voltage.

[0013] In one embodiment, the printed circuit between the connection interface and the wireless communication module includes a second signal transmission line and a second signal receiving line, which are used to transmit the communication data and the display instruction between the connection interface and the wireless communication module;

[0014] The wireless communication module is connected to the second signal sending line and the second signal receiving line respectively through a first level converter, and the first level converter is used to perform voltage regulation processing on the display instruction.

[0015] In one embodiment, the printed circuit between the wireless communication module and the driver chip includes a digital input and output line, a selection signal line and a clock line, which are used to transmit display instructions between the wireless communication module and the driver chip;

[0016] The wireless communication module is respectively connected to the digital input / output line, the selection signal line and the clock line through a second level converter, and the second level converter is used for voltage regulation processing of the display instruction.

[0017] In one embodiment, it further includes an infrared receiving end, which is connected to the wireless communication module through a printed circuit in the circuit board, and is used to receive infrared signals and send the infrared signals to the wireless communication module;

[0018] The wireless communication module is also used to decode the infrared signal and send the decoding result to the connection interface, so that the connection interface sends the decoding result to the controller.

[0019] In one embodiment, it further includes a photosensitive receiving end, which is connected to the wireless communication module through a printed circuit in the circuit board, and is used to receive a photosensitive signal and send the photosensitive signal to the wireless communication module;

[0020] The wireless communication module is also used to decode the photosensitive signal and send the decoding result to the connection interface, so that the connection interface sends the decoding result to the controller.

[0021] In one embodiment, it also includes a display screen composed of light emitting diodes or a liquid crystal display screen, which is used to display according to the driving instructions of the driving chip.

[0022] According to a second aspect of an embodiment of the present disclosure, there is provided a household appliance, comprising the circuit board described in the first aspect.

[0023] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0024] The circuit board provided by the present disclosure can realize the connection between the circuit board and the controller by setting the connection interface, so that power, communication data and display instructions can be transmitted between the controller and the circuit board, and power and communication data can be transmitted between the circuit board and the controller by setting the wireless communication module, and display instructions can be obtained from the connection interface and sent to the driver chip, and power can be transmitted between the circuit board and the connection interface by setting the driver chip, and the display screen of the household appliance can be controlled to display according to the display instructions. Since the wireless communication module and the driver chip are integrated on the circuit board, power, communication data and display instructions are transmitted between the wireless communication module and the connection interface through printed circuits, display instructions are transmitted between the wireless communication module and the driver chip through printed circuits, and power is transmitted between the driver chip and the connection interface through printed circuits. Therefore, the controller only needs to be connected to the connection interface through a physical connection line to realize power transmission and communication data transmission between the controller and the wireless communication module, as well as power transmission and display instruction transmission between the controller and the driver chip, which reduces the wiring complexity between the controller and the wireless communication module and the driver chip, reduces the production difficulty, and improves the connection stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] Figure 1 is an internal circuit diagram of a circuit board shown in an exemplary embodiment of the present disclosure;

[0027] Figure 2 It is a connection diagram of a controller and a wireless communication module, a driving chip, an infrared receiving end and a photosensitive receiving end in a related technology shown in an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0030] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0031] In a first aspect, at least one embodiment of the present disclosure provides a circuit board 100 of a household appliance, Figure 1 , which shows the internal circuit diagram of the circuit board 100. Figure 1 It can be seen that the circuit board 100 includes a connection interface 101, a wireless communication module 102 and a driver chip 103, wherein the connection interface 101 is used to connect to the controller 200 of the household appliance through a physical connection line to transmit power, communication data and display instructions between the controller 200; the wireless communication module 102 is connected to the connection interface 101 and the driver chip 103 through the printed circuits in the circuit board 100 respectively, and is used to transmit power and the communication data between the connection interface 101, and obtain the display instruction from the connection interface 101, and send the display instruction to the driver chip 103; the driver chip 103 is connected to the connection interface 101 through the printed circuits in the circuit board 100, and is used to obtain power from the connection interface 101, and control the display screen 104 of the household appliance to display according to the display instruction.

[0032] Among them, the household appliance can be an air conditioner, a fresh air blower, an electric fan, a refrigerator, etc. The household appliance has a display function, and the display function is realized by the controller 200 of the household appliance controlling the driver chip 103 to drive the display screen 104. Therefore, the household appliance has a controller 200, a driver chip 103 and a display screen 104. The driver chip 103 is integrated on the circuit board 100 provided in this embodiment. The display screen 104 can be a display screen 104 composed of light-emitting diodes integrated on the circuit board 100 or a liquid crystal display screen 104, or a display screen 104 independent of the circuit board 100. The household appliance has a wireless communication function, and the wireless communication function is realized by the controller 200 of the household appliance controlling the wireless communication module 102 to receive and send data. Therefore, the household appliance also has a wireless communication module 102, and the wireless communication module 102 is integrated on the circuit board 100 provided in this embodiment. The controller 200 of the household appliance can be a main control board of the household appliance, or a dedicated microcontroller unit (MCU) that controls the circuit board 100.

[0033] The connection interface 101 may be a physical interface reserved on the circuit board 100, for example, reserved near the side of the circuit board 100, to facilitate the connection of the physical connection line. The connection interface 101 may be in the form of a socket, and a plug matching the socket may be provided at the end of the physical connection line, and then the physical connection line and the connection interface 101 are connected by inserting the plug into the socket, which not only improves the convenience of connection, but also improves the stability of connection.

[0034] There are processes such as power transmission, communication data transmission and display instruction transmission between the controller 200 and the circuit board 100. The power transmission process can be the process of the controller 200 supplying power to the wireless communication module 102 and the driver chip 103; the transmission of communication data can include the controller 200 sending the communication data to be sent to the wireless communication module 102, so that the wireless communication module 102 sends the communication data to be sent to the destination address through the network, and can also include the wireless communication module 102 uploading the communication data received from the network to the controller 200. The transmission of display instructions can be the controller 200 sending display instructions to the driver chip 103.

[0035] Each of the above transmission processes is composed of external transmission outside the circuit board 100 and internal transmission inside the circuit board 100, and the physical connection line between the connection interface 101 and the controller 200 is used to complete the external transmission of each of the above transmission processes, that is, to transmit power, communication data and display instructions. In a possible embodiment, the physical connection line between the connection interface 101 and the controller 200 includes a first power transmission line (e.g. Figure 1 ), the first ground line (e.g. Figure 1), the first signal transmission line (eg Figure 1 ) and a first signal receiving line (eg, Figure 1 RX line shown in ), wherein the first power transmission line and the first ground line are used to transmit power between the controller 200 and the connection interface 101, and the first signal sending line and the first signal receiving line are used to transmit communication data and display instructions between the controller 200 and the connection interface 101.

[0036] The circuit board 100 may be a printed circuit board (PCB). The printed circuit may be a connection circuit (eg, PCB trace) prepared in the circuit board 100 by etching or other processes, so the printed circuit does not increase the number and complexity of physical connection lines.

[0037] The wireless communication module 102 can send the communication data downloaded from the network to the connection interface 101 through the printed circuit, so that the connection interface 101 can report the communication data to the controller 200 through the physical connection line; the wireless communication module 102 can also obtain the communication data sent by the controller 200 from the connection interface 101 through the printed circuit, and upload the communication data to the network as required.

[0038] The display instruction includes display content. The driver chip 103 can drive the display screen 104 to display, and the displayed content is the display content in the display instruction.

[0039] The circuit board 100 provided by the present disclosure can realize the connection between the circuit board 100 and the controller 200 by setting the connection interface 101, so that power, communication data and display instructions, etc. can be transmitted between the circuit board 100 and the controller 200. By setting the wireless communication module 102, power and communication data can be transmitted between the circuit board 100 and the controller 200, and display instructions can be obtained from the connection interface 101 and sent to the driver chip 103. By setting the driver chip 103, power can be transmitted between the circuit board 100 and the controller 200, and the display screen 104 of the household appliance can be controlled to display according to the display instructions. Since the wireless communication module 102 and the driver chip 103 are integrated on the circuit board 100, power, communication data and display instructions are transmitted between the wireless communication module 102 and the connection interface 101 through printed circuits, display instructions are transmitted between the wireless communication module 102 and the driver chip 103 through printed circuits, and power is transmitted between the driver chip 103 and the connection interface 101 through printed circuits. Therefore, the controller 200 only needs to be connected to the connection interface 101 through physical connecting lines to realize power transmission and communication data transmission between the controller 200 and the wireless communication module 102, as well as power transmission and display instruction transmission between the controller 200 and the driver chip 103, which reduces the connection complexity between the controller 200 and the wireless communication module 102 and the driver chip 103, reduces the production difficulty, and improves the connection stability.

[0040] In some embodiments of the present disclosure, the printed circuit between the connection interface 101 and the wireless communication module 102 includes a second power transmission line and a second ground line, which are used to transmit power between the connection interface 101 and the wireless communication module 102; a current converter 105 and a voltage regulator 106 are provided on the second power transmission line, wherein the current converter 105 is used to reduce the voltage of the power at the connection interface 101 to a first voltage, and the voltage regulator 106 is used to reduce the voltage of the power at the current converter 105 from the first voltage to the second voltage.

[0041] The printed circuit between the connection interface 101 and the driver chip 103 includes a third power transmission line and a third ground line, which are used to transmit power between the connection interface 101 and the driver chip 103; a current converter 105 is provided on the third power transmission line, wherein the current converter 105 is used to reduce the voltage of the power at the connection interface 101 to the first voltage.

[0042] The printed circuit between the connection interface 101 and the wireless communication module 102 is the power supply circuit of the wireless communication module 102, and the printed circuit between the connection interface 101 and the driver chip 103 is the power supply circuit of the driver chip 103. The power supply circuit of the wireless communication module 102 and the power supply circuit of the driver chip 103 can share the current converter 105 and the printed circuit between the current converter 105 and the connection interface 101. In other words, the connection interface 101 transmits power to the wireless communication module 102 through the second power transmission line (third power transmission line, for example Figure 1 ) and a second ground line (a third ground line, such as Figure 1 ) and the current converter 105 (eg Figure 1 The current converter 105 is then connected via a second power transmission line (eg, a 12V to 5V converter). Figure 1 ) and a second ground line (e.g. Figure 1 ) and the regulator 106 (eg Figure 1 ) is connected, and the regulator 106 is then connected via a second power transmission line (eg, Figure 1 ) and a second ground line (e.g. Figure 1 ) is connected to the wireless communication module 102, and the current converter 105 is also connected to the wireless communication module 102 through a third power transmission line (eg Figure 1 ) and a third ground line (e.g. Figure 1 ) is connected to the driver chip 103. For example, the controller 200 transmits 12V voltage electric energy to the connection interface 101, and the current converter 105 is a DC-DC current converter 105, which can convert the 12V voltage into a 5V voltage (that is, the first voltage is 5V), and the working voltage of the driver chip 103 is 5V, so the 5V voltage electric energy output by the current converter 105 is transmitted to the driver chip 103 to power it, and the voltage regulator 106 can be a low-dropout linear regulator 106 (LDO), which can reduce the 5V voltage to 3.3V (that is, the second voltage is 3.3V), and the working voltage of the wireless communication module 102 is 3.3V, so the 3.3V voltage electric energy output by the voltage regulator 106 is transmitted to the wireless communication module 102 to power it.

[0043] Voltage regulation can be achieved through printed circuits and components such as current converter 105 and voltage regulator 106 integrated on circuit board 100, so that the power received by connection interface 101 can power wireless communication module 102 and driver chip 103 respectively without increasing the number and complexity of physical connection lines.

[0044] In some embodiments of the present disclosure, the printed circuit between the connection interface 101 and the wireless communication module 102 includes a second signal transmission line (eg Figure 1 TX line shown in ) and a second signal receiving line (eg Figure 1 ), used to transmit the communication data and the display instruction between the connection interface 101 and the wireless communication module 102; the wireless communication module 102 is respectively connected to the second signal sending line and the second signal receiving line through a first level converter 107, and the first level converter 107 is used to perform voltage regulation processing on the display instruction.

[0045] The first level converter 107 may be a triode. The first level converter 107 can adjust the display instruction sent from the connection interface 101 to the wireless transmission module to its operating voltage, so that the wireless transmission module can recognize and process the display instruction after receiving it. For example, the operating voltage of the wireless communication module 102 is 3.3V, so the first level converter 107 can adjust the display instruction and communication data on the second signal transmission line to 3.3V and then transmit it to the level converter.

[0046] In some embodiments of the present disclosure, the printed circuit between the wireless communication module 102 and the driver chip 103 includes digital input and output lines (eg Figure 1 DIO lines shown in ), strobe signal lines (such as Figure 1 STB lines shown in ) and clock lines (e.g. Figure 1 ), which is used to transmit display instructions between the wireless communication module 102 and the driver chip 103; the wireless communication module 102 is connected to the digital input and output lines, the selection signal line and the clock line respectively through a second level converter 108, and the second level converter 108 is used to regulate the voltage of the display instructions.

[0047] The second level converter 108 may be a triode. The second level converter 108 can adjust the display instruction sent by the wireless transmission module to the driver chip 103 to the working voltage of the driver chip 103, so that the driver chip 103 can recognize the display instruction after receiving it and drive the display screen 104 accordingly. For example, the working voltage of the driver chip 103 is 5V, so the second level converter 108 can adjust the display instruction in the wireless communication module 102 to 5V, and then transmit it to the driver chip 103 through the digital input and output line, the selection signal line and the clock line.

[0048] Combining the above two embodiments, it can be seen that the level converters are respectively provided at the upstream and downstream of the wireless communication module 102. This is because the operating voltages of the wireless communication module 102 and the driver chip 103 are different, and the display instruction needs to be transmitted to the driver chip 103 through the wireless communication module 102, so the display instruction needs to go through two voltage regulation processes. In a possible embodiment, the voltage of the display instruction sent by the controller 200 to the connection interface 101 is the operating voltage of the driver chip 103, such as 5V, and the voltage regulation process of the two level converters upstream and downstream of the wireless communication module 102 is a reverse process, that is, the level converter upstream of the wireless communication module 102 adjusts the voltage of the display instruction to the operating voltage of the wireless communication module 102, for example, converts the display instruction from 5V to 3.3V, and the level converter downstream of the wireless communication module 102 restores the voltage of the display instruction to the operating voltage of the driver chip 103, for example, restores the voltage of the display instruction to 5V, and then the driver chip 103 can recognize the display instruction after receiving it, and drive the display of the display screen 104 accordingly. This embodiment uses two voltage adjustment processes to enable the display command to overcome the problem of different operating voltages between the wireless communication module 102 and the driver chip 103 , thereby achieving smooth transmission of the display command through the wireless communication module 102 .

[0049] In some embodiments of the present disclosure, the circuit board 100 also includes an infrared receiving terminal 109, which is connected to the wireless communication module 102 through a printed circuit in the circuit board 100, and is used to receive infrared signals and send the infrared signals to the wireless communication module 102; the wireless communication module 102 is also used to decode the infrared signals and send the decoding results to the connection interface 101, so that the connection interface 101 sends the decoding results to the controller 200.

[0050] The infrared receiving end 109 can receive the infrared control signal of the remote control, and then report it to the controller 200 through the wireless communication module 102 and the connection interface 101. The controller 200 can generate control instructions based on this, and the control instructions can also include display instructions. In this case, the controller 200 will send the display instructions to the driver chip 103 through the connection interface 101 and the wireless communication module 102, so that the driver chip 103 drives the display screen 104 for display.

[0051] The wireless communication module 102 decodes the infrared signal and generates a decoding result in the form of a digital signal, so that the wireless communication module 102 can report the infrared signal to the controller 200 , that is, the digital signal can be reported to the controller 200 through the connection interface 101 .

[0052] In the related art, the infrared receiving end 109 needs a separate physical connection line to connect to the controller 200. Therefore, in this embodiment, the infrared signal is transmitted through the wireless communication module 102, which can avoid the physical connection line between the infrared receiving end 109 and the controller 200 and reduce the complexity of the connection.

[0053] In some embodiments of the present disclosure, the circuit board 100 also includes a photosensitive receiving end 110, which is connected to the wireless communication module 102 via a printed circuit in the circuit board 100, and is used to receive a photosensitive signal and send the photosensitive signal to the wireless communication module 102; the wireless communication module 102 is also used to decode the photosensitive signal and send the decoding result to the connection interface 101, so that the connection interface 101 sends the decoding result to the controller 200.

[0054] The photosensitive receiving end 110 can receive light signals in the environment, such as brightness signals, and then report them to the controller 200 through the wireless communication module 102 and the connection interface 101. The controller 200 can generate control instructions based on this, such as display instructions for reducing the display brightness of the display screen 104. In this case, the controller 200 will send the display instructions to the driver chip 103 through the connection interface 101 and the wireless communication module 102, so that the driver chip 103 drives the display screen 104 to display.

[0055] After decoding the photosensitive signal, the wireless communication module 102 generates a decoding result in the form of a digital signal, so that the wireless communication module 102 can report the photosensitive signal to the controller 200, that is, the digital signal can be reported to the controller 200 by the wireless communication module 102 through the connection interface 101.

[0056] In the related art, the photosensitive receiving end 110 needs a separate physical connection line to connect to the controller 200. Therefore, in this embodiment, the photosensitive signal is transmitted through the wireless communication module 102, which can avoid the physical connection line between the photosensitive receiving end 110 and the controller 200 and reduce the complexity of the connection.

[0057] The circuit board provided by the present disclosure can reduce the complexity of the connection between the controller and the wireless communication module, the driver chip, the infrared receiving end and the photosensitive receiving end, etc., and realize simplified control. The above effect is explained below by comparing the connection method in the related art with the connection method of an embodiment of the present disclosure.

[0058] The connection method in the related technology is as follows Figure 2As shown, the controller is connected to the wireless communication module through 4 physical connection lines, namely 5V, GND, RX, and TX. The controller is connected to the infrared receiving end and the photosensitive receiving end through 2 physical connection lines. The controller is connected to the driver chip through 5 physical connection lines, namely 5V, GND, STB, DIO, and CLK. The driver chip is connected to the display screen. It can be seen that the connection between the controller and the wireless communication module, the infrared receiving end, the photosensitive receiving end, and the driver chip requires a total of 11 physical connection lines.

[0059] The present disclosure Figure 1 In the embodiment shown, the controller and the circuit board are connected via 4 physical connection lines, 5V, GND, RX, and TX. It can be seen that the connection method provided by the present application can save at least 7 connection lines, that is, it can reduce the complexity of the connection between the controller and the wireless communication module, the driver chip, the infrared receiving end, the photosensitive receiving end, etc., and realize streamlined control.

[0060] According to a second aspect of the embodiment of the present disclosure, there is provided a household appliance, comprising the circuit board described in the first aspect, wherein the household appliance may be an air conditioner, a fresh air blower, an electric fan, a refrigerator, and the like.

[0061] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0062] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A circuit board for household appliances, characterized in that: include: A connection interface, used to connect to a controller of a household appliance through a physical connection line to transmit power, communicate data and display instructions to the controller; a wireless communication module, connected to the connection interface and the driver chip through the printed circuits in the circuit board, respectively, for transmitting power and the communication data to the connection interface, obtaining the display instruction from the connection interface, identifying and processing the display instruction, and sending the display instruction to the driver chip; A driver chip connected to the display screen of the household appliance and connected to the connection interface through a printed circuit in the circuit board, for obtaining electric energy from the connection interface and controlling the display screen to display according to the display instruction; The physical connection lines between the connection interface and the controller include a first power transmission line, a first ground line, a first signal transmission line, and a first signal receiving line, wherein the first power transmission line and the first ground line are used to transmit power between the controller and the connection interface, and the first signal transmission line and the first signal receiving line are used to transmit communication data and display instructions between the controller and the connection interface; The printed circuit between the connection interface and the wireless communication module includes a second signal sending line and a second signal receiving line, which are used to transmit the communication data and the display instruction between the connection interface and the wireless communication module; The printed circuit between the wireless communication module and the driving chip includes a digital input and output line, a selection signal line and a clock line, which are used to transmit display instructions between the wireless communication module and the driving chip.

2. The circuit board of a household appliance according to claim 1, characterized in that: The printed circuit between the connection interface and the wireless communication module includes a second power transmission line and a second ground line, which are used to transmit power between the connection interface and the wireless communication module; A current converter and a voltage regulator are provided on the second power transmission line, wherein the current converter is used to reduce the voltage of the power at the connection interface to a first voltage, and the voltage regulator is used to reduce the voltage of the power at the current converter from the first voltage to a second voltage.

3. The circuit board of a household appliance according to claim 1, characterized in that: The printed circuit between the connection interface and the driver chip includes a third power transmission line and a third ground line, which are used to transmit power between the connection interface and the driver chip; The third power transmission line is provided with a current converter, wherein the current converter is used to reduce the voltage of the power at the connection interface to a first voltage.

4. The circuit board of a household appliance according to claim 1, characterized in that: The wireless communication module is connected to the second signal sending line and the second signal receiving line respectively through a first level converter, and the first level converter is used to perform voltage regulation processing on the display instruction.

5. The circuit board of a household appliance according to claim 1, characterized in that: The wireless communication module is respectively connected to the digital input / output line, the selection signal line and the clock line through a second level converter, and the second level converter is used for voltage regulation processing of the display instruction.

6. The circuit board of a household appliance according to claim 1, characterized in that: It also includes an infrared receiving end, which is connected to the wireless communication module through a printed circuit in the circuit board, and is used to receive infrared signals and send the infrared signals to the wireless communication module; The wireless communication module is also used to decode the infrared signal and send the decoding result to the connection interface, so that the connection interface sends the decoding result to the controller.

7. The circuit board of a household appliance according to claim 1, characterized in that: It also includes a photosensitive receiving end, which is connected to the wireless communication module through a printed circuit in the circuit board, and is used to receive a photosensitive signal and send the photosensitive signal to the wireless communication module; The wireless communication module is also used to decode the photosensitive signal and send the decoding result to the connection interface, so that the connection interface sends the decoding result to the controller.

8. The circuit board of a household appliance according to claim 1, characterized in that: It also includes a display screen composed of light emitting diodes or a liquid crystal display screen, which is used for displaying according to the driving instructions of the driving chip.

9. A household appliance, characterized in that: A circuit board comprising the circuit board described in any one of claims 1 to 8.

Images