Key screen suitable for lightning interface and power supply control circuit

Abstract

The invention relates to a key screen suitable for a thunder interface and a power supply control circuit, the key screen comprises a power supply module and a processor, the input of the power supply module is externally connected with a power supply, the power supply module is used as a power supply of the key screen suitable for the thunder interface and comprises a foldable display screen and a keyboard area, and the structure is similar to that of a notebook computer. The display screen and the keyboard area are respectively arranged on the inner surfaces of the two hinges, the keyboard area comprises a keyboard and a touch panel, the display screen and the keyboard area are respectively in signal connection with an interface module, and the interface module is used for being externally connected with a host. The pocket computer inherits the characteristic of being convenient to carry of a traditional screen, a keyboard, a mouse and sound equipment, solves the problem that in the prior art, when a pocket computer is used, various electronic devices need to be carried, and is very troublesome, has the characteristic of being convenient to use and carry, and can meet more comprehensive use requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of displays, and specifically to a key screen applicable to a Thunderbolt interface and a power control circuit. Background Art

[0002] Today, with the accelerating pace of life, laptops have become the top choice for people who often travel on business or for tourism. The configuration of laptops is getting higher and higher. While laptops bring us convenience, they also have great limitations. The most prominent problem is the narrow internal space of laptops, poor heat dissipation, and the inability to fully release the functions of the CPU and GPU. Most of the time, they are used at reduced frequencies. It can still cope with typing and office work, but if there are gaming requirements or AI programs are called, the CPU easily exceeds 90 degrees, commonly known as "baking the machine". The keyboard gets hotter and hotter, and the fan noise gets louder and louder, resulting in a sharp decline in the experience.

[0003] The rapid development of chips and power supplies has brought us new options.

[0004] First, the integrated graphics performance of Intel's Ultra 7 and AMD's Ryzen 8000g series has been greatly improved, and the overall performance has reached above GTX 1650. Intel's Ultra 9 and AMD's AI 300 series can even reach above GTX 1050. In this way, most games and AI processing can be satisfied without the need to equip an independent graphics card, thus reducing a large heat source. Based on the above chips, the main body of the computer can be made smaller and smaller until the "pocket computer" is realized.

[0005] The pocket computer can be made smaller and smaller while maintaining gradually improving performance; the processor performance of mobile phones is also increasingly excessive. Currently, existing devices such as portable screens and keyboards are separate. Moreover, the function of the portable screen is mostly used as a secondary screen, and this design is very inconvenient for users on the go. Summary of the Invention

[0006] The present invention provides a key screen applicable to a Thunderbolt interface and a power control circuit. For the key screen applicable to the Thunderbolt interface, this application inherits traditional screens, keyboards, mice, and speakers, and has the characteristics of being convenient to carry. It solves the problem in the prior art that when using a pocket computer, it is very troublesome to carry multiple electronic devices. It has the characteristics of being convenient to use and carry, and can meet more comprehensive usage requirements. For the power control circuit, it solves the situation that there may be unstable voltage or electromagnetic interference in some complex environments or remote areas. Applying this application can reduce electromagnetic interference and output a stable DC power supply for the subsequent system.

[0007] The technical solution of the present invention is as follows: A key screen applicable to Thunderbolt interface, comprising a power module and a processor. The input of the power module is externally connected to a power supply. The power module serves as the power supply for the key screen applicable to Thunderbolt interface, including a foldable display screen and a keyboard area. This structure is similar to that of a laptop computer. The display screen and the keyboard area are respectively on the inner surfaces of the two folding fans. The keyboard area includes a keyboard and a touchpad. The display screen and the keyboard area are respectively signal-connected to an interface module, and the interface module is used to externally connect to a host computer.

[0008] As a further optimization of this solution, the interface module includes multiple USB interfaces and a Thunderbolt 4 interface. Each interface in the interface module is signal-connected to the display screen, the keyboard, and the touchpad through a data exchange circuit. The power module is power-connected to the interface module.

[0009] As a further optimization of this solution, it further includes a camera module. The camera module includes a camera control circuit and a camera electrically connected to the camera control circuit. The camera control circuit is connected to the interface module through the data exchange circuit.

[0010] As a further optimization of this solution, it further includes an audio module. The audio module includes an audio control circuit, an audio, and a microphone electrically connected to the audio control circuit. The audio control circuit is connected to the interface module through the data exchange circuit.

[0011] A key screen applicable to Thunderbolt interface, which is similar to a laptop computer. There are only two differences compared with a laptop computer. That is, the key screen applicable to Thunderbolt interface does not have a core processor compared with a laptop computer, and there is a Thunderbolt 4 interface and a Thunderbolt 4 conversion circuit required for the Thunderbolt 4 interface; at the same time, it is compatible with using a mobile phone processor as a host and realizes reverse charging of the mobile phone.

[0012] As a further optimization of this solution, the key screen applicable to Thunderbolt interface is similar to a laptop computer with a touchpad.

[0013] As a further optimization compared with a laptop computer, the difference is that the key screen applicable to Thunderbolt interface does not have a display adapter.

[0014] A power control circuit, the input of which is externally connected to a voltage source for supplying power to a subsequent system, includes a noise reduction unit, a rectification unit, a boost unit, a drive unit, and secondary side output, tertiary side output, and quaternary side output. The input of the noise reduction unit is externally connected to an external alternating current, the output of the noise reduction unit is connected to the input of the rectification unit, the output of the rectification unit is connected to the input of the boost unit, the output of the boost unit is connected to the input of the drive unit, the output of the drive unit is used as the input of the primary side of a transformer, and the secondary side output, the tertiary side output, and the quaternary side output are respectively on the secondary side, tertiary side, and quaternary side of the transformer.

[0015] As a further optimization of this solution, the noise reduction unit includes inductors L1, L2, and a common mode inductor L8. The input of inductor L1 is connected to an external power supply through a fuse tube. A filter capacitor and a voltage dividing resistor are provided between inductor L1 and inductor L2. A capacitor C4 and a thermistor R5 are provided between inductor L2 and common mode inductor L8. The output of common mode inductor L8 is connected to a rectifier BD1 of a voltage stabilizing module. The input of rectifier BD1 is also connected to a thermistor R8. The output of rectifier BD1 is connected to the boost unit. The boost unit includes an inductor group, a switch module, and a capacitor module. The input of the boost unit is connected to the positive output of rectifier BD1. One end of the inductor group is used as the input of the boost unit, the other end of the inductor group is connected to the positive electrode of diode D1 through resistor R9. A series connection point of resistor R9 and diode D1 is connected to the drain of switch tube Q1 between the power supply ground. The source of switch tube Q1 is grounded. The gate of switch tube Q1 is externally connected to a PWM control signal through an amplifier. The negative electrode of diode D1 is used as the output of the boost module through a capacitor unit connected in parallel with the power supply ground.

[0016] As a further optimization of this solution, the drive unit includes switch tubes Q3 and Q6. The drain of switch tube Q3 is used as the input of the drive unit. The source of switch tube Q3 is connected to the drain of switch tube Q6. The source of switch tube Q6 is grounded. The gates of switch tubes Q3 and Q6 are externally connected to PWM signals with opposite waveforms. The drain of switch tube Q3 is used as the output of the drive unit and is connected to the positive electrode of the primary side of transformer T1.

[0017] The working principle and beneficial effects of the present invention are as follows: This solution integrates traditional screens, keyboards, audio equipment, etc., and can realize all the functions of traditional laptops when used with a pocket host; when used with a mobile phone, the performance of the mobile phone can be reused to handle some complex tasks. The structure of this application is similar to that of a laptop, but since there are no two major computing modules, the CPU and graphics card, the heat dissipation of this application is very low and will not affect the performance of the pocket host. While ensuring performance, it satisfies the user experience of computer use. At the same time, this technical solution is also compatible with the mobile phone processor as the host and realizes reverse charging of the mobile phone.

[0018] In the present application, L1, L2 and L8 of the power control circuit can filter out noise and block unstable current. The input of the switch tube Q1 in the boost circuit is provided with an amplifier for driving, which can enhance the anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a principle block diagram of a key screen suitable for the Thunderbolt interface in this application; Figure 2 This is a schematic diagram of the appearance of this application; Figure 3 This is a schematic diagram of an embodiment of the present application; Figure 4 is a schematic diagram of the interface unit in this application; Figure 5 The primary side of the transformer for the power control circuit; Figure 6 It is the transformer secondary side output of the power control circuit; Figure 7 It is the transformer tertiary output of the power control circuit; Figure 8 It is the transformer quaternary side output of the power control circuit; Figure 9 This is an example of square wave driving in the embodiment. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the following description of the embodiments, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0023] It should be understood that when used in the specification and the appended claims of the present application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations. It should also be understood that the term "and / or" as used in the specification and the appended claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. As used in the specification and the appended claims of the present application, the term "if" can be interpreted as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if determined" or "if detected [the described condition or event]" can be interpreted as meaning "once determined" or "in response to determining" or "once detected [the described condition or event]" or "in response to detecting [the described condition or event]" depending on the context.

[0024] In addition, in the description of the specification and the appended claims of the present application, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. The reference to "one embodiment" or "some embodiments" or the like described in the specification of the present application means that a specific feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "including", "comprising", "having", and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0025] As described in the accompanying Figure 1As shown in the figure, a keyboard screen applicable to a Thunderbolt interface includes a power module and a processor. The input of the power module is externally connected to a power supply. The power module serves as the power supply for the keyboard screen applicable to the Thunderbolt interface. It includes a foldable display screen and a keyboard area. This structure is similar to that of a laptop computer. The display screen and the keyboard area are respectively on the inner surfaces of the two folding fans. The keyboard area includes a keyboard and a touchpad. The display screen and the keyboard area are respectively connected to an interface module through signals. The interface module is used to externally connect to a host computer. The interface module includes a Type-A interface, a Type-C interface, and a Thunderbolt 4 interface. The principle of the keyboard area in this application is the same as that of a laptop computer with a touchpad, such as the ThinkPad series.

[0026] As shown in the attached Figure 4 figure, the interface module includes multiple USB interfaces and a Thunderbolt 4 interface. Each interface in the interface module is connected to the display screen, the keyboard, and the touchpad through a data exchange circuit through signals. The power module is connected to the interface module for power supply. This module is similar to a docking station. The processor can enable the keyboard, mouse, and an externally connected host computer and display to work in adaptation in the data exchange circuit.

[0027] As shown in the attached Figure 1 figure, it further includes a camera module. The camera module includes a camera control circuit and a camera electrically connected to the camera control circuit. The camera control circuit is connected to the interface module through the data exchange circuit. Among them, a camera is externally connected to the camera control circuit, and its principle is the same as that of the camera and the internal camera control circuit in a laptop computer. It further includes an audio module. The audio module includes an audio control circuit, a speaker, and a microphone electrically connected to the audio control circuit. The audio control circuit is connected to the interface module through the data exchange circuit. The audio control circuit is connected to a speaker, and its principle is the same as that of the speaker and the audio control circuit in a laptop computer or a TV.

[0028] Embodiment 1: A keyboard screen applicable to a Thunderbolt interface. This keyboard screen applicable to a Thunderbolt interface is similar to a laptop computer. The difference compared with a laptop computer is that there is no core processor in this keyboard screen applicable to a Thunderbolt interface, and there is a Thunderbolt 4 interface and a Thunderbolt 4 conversion circuit required for the Thunderbolt 4 interface.

[0029] This keyboard screen applicable to a Thunderbolt interface is similar to a laptop computer with a touchpad. You can refer to the ThinkPad laptop, remove the graphics card and CPU, and externally place the graphics card and CPU in the form of a pocket host, or only externally place the CPU in the form of a pocket host and cancel the independent graphics card.

[0030] Embodiment 2: The difference compared with a laptop computer is that there is no display adapter in this keyboard screen applicable to a Thunderbolt interface.

[0031] This application combined with a pocket host or a desktop host is equivalent to a complete computer function.

[0032] Among them, the pocket host or pocket computer can take Beelink as an example. Beelink has already made the size of the host very small. If an external power supply and new materials are used, it can be made even more extremely small and compact, capable of being put into a pocket, and it also has a full-blooded Thunderbolt 4 interface. Nowadays, many brand mobile phones also have a full-blooded TAPE-C interface.

[0033] On the other hand, VIA Labs launched a USB4 conversion chip in 2022. It has a USB4 or Thunderbolt 4 upstream interface, with 5 downstream interfaces and 1 DP interface. The DP interface supports a bandwidth of 32.4Gbit / s and can support up to 8K / 60Hz HDR video output. The hardware supports the security function of digitally signed firmware, supports PWM-driven LED indicators, and supports firmware upgrade through the USB interface or I2C bus. The USB port supports charging protocols such as BC1.2, Apple2.4A, and Samsung, and can charge the connected devices. It has a built-in USB3.2 hub, supporting 4 USB3.2 and one USB2.0 interface, and also supports a DP1.4a interface. Among them, the DP interface can also be converted into an HDMI interface through other adapter chips, and with chips such as VIA Labs VL103 and VL105 for PD support, it can realize the power supply of the USB-C port of a laptop, and the expansion of USB interfaces and display interfaces.

[0034] The present invention provides a Thunderbolt key screen as shown in the appendix Figure 1 As shown, taking into account the user's usage habits, it still adopts the form factor of a laptop, only leaving the screen, speakers, keyboard, and camera functions.

[0035] The screen, speakers, and camera components are integrated together.

[0036] Key screen combination method 1: Adopt the method of a physical keyboard plus a display. In this solution, the requirements for the screen are relatively low and it is also easy to implement.

[0037] Keyboard combination method 2: Adopt the method of a touch folding screen. In the folded state, the upper screen is used as a display function, and the lower screen is a virtual keyboard, which is suitable for computer office scenarios; in the unfolded state, the two screens form a large screen, which is suitable for scenarios such as watching movies. When adopting this solution, an additional hidden bracket needs to be designed.

[0038] The main external interfaces are Thunderbolt 4 interface, Type C interface, and USB interface. The Thunderbolt 4 interface can be used as a separate power supply interface or as an interface for both data and power supply. The Type C interface can support interconnection with mobile phone and tablet devices, etc. The USB interface can be used as an expansion interface or as a source for other audio and video content.

[0039] The circuit main board mainly consists of a Thunderbolt 4 interface conversion circuit, a data exchange circuit, a processor, an audio control circuit, a camera control circuit, and a power control circuit. The Thunderbolt 4 interface conversion circuit separates the power line and the signal line of the Thunderbolt 4 interface. The signal line is connected to the data exchange circuit, and the power line is connected to the power control circuit. The power control circuit provides appropriate voltage and power for each component of the main board. The data exchange circuit mainly completes two functions: one is the conversion of data packets with different protocols, and the other is the routing of data packets. The audio control circuit is used to drive audio devices. The camera control circuit is used to control the camera component. The processor is the core of the entire main board, used to run the operating system of the device, control each component of the main board internally, and provide content for user interaction through the display externally.

[0040] The body shell is made of new materials such as carbon fiber, achieving extreme thinness and lightness, and at the same time playing a role in protecting the screen.

[0041] A rechargeable battery is built-in and only functions when the mobile phone is connected.

[0042] The design scheme of the pocket computer + Thunderbolt key screen realizes a cool and noise-free keyboard environment on the basis of being convenient to carry, and also ensures the performance, having broad application prospects.

[0043] As shown in the attached Figures 5 - 8 As shown in the attached instruction manual, a power control circuit. The input of this power control circuit is externally connected to a voltage source, used to supply power to the subsequent system, including a noise reduction unit, a rectification unit, a boost unit, a drive unit, and secondary side output, tertiary side output, and quaternary side output. The input of the noise reduction unit is externally connected to an external alternating current. The output of the noise reduction unit is connected to the input of the rectification unit. The output of the rectification unit is connected to the input of the boost unit. The output of the boost unit is connected to the input of the drive unit. The output of the drive unit is used as the input of the primary side of the transformer. The secondary side output, the tertiary side output, and the quaternary side output are respectively on the secondary side, tertiary side, and quaternary side of the transformer. On the primary side of the transformer T1, an externally connected voltage source is input, filtered through a three-pole inductor and then the alternating current is converted into a changing direct current through a rectifier bridge, and then the voltage is boosted to the required range through a boost circuit, and finally converted into a changing current by the drive unit. Among them, the period and duty cycle of the square wave input in the boost unit can be determined according to the required voltage, and are converted into three voltage sources Vout, Vs, and VCC respectively by the transformer for output, which can be used as three separate voltage sources.

[0044] As shown in the attached instruction manual Figure 5As shown, the noise reduction unit includes inductors L1, L2 and common mode inductor L8. The input of inductor L1 is connected to an external power supply through a fuse tube. A filter capacitor and a voltage dividing resistor are arranged between inductor L1 and inductor L2. A capacitor C4 and a thermistor R5 are arranged between inductor L2 and common mode inductor L8. The output of common mode inductor L8 is connected to a rectifier BD1 of a voltage stabilization module. The input of rectifier BD1 is also connected to a thermistor R8. The output of rectifier BD1 is connected to the boost unit. The boost unit includes an inductor group, a switch module and a capacitor module. The input of the boost unit is connected to the positive output of rectifier BD1. One end of the inductor group serves as the input of the boost unit. The other end of the inductor group is connected to the positive pole of diode D1 through resistor R9. The series connection point of resistor R9 and diode D1 is connected to the drain of switch Q1 between the power supply ground. The source of switch Q1 is grounded. The gate of switch Q1 is externally connected to a PWM control signal through an amplifier. The negative pole of diode D1 is used as the output of the boost module through a capacitor unit in parallel with the power supply ground. The three inductors in the front stage play a filtering role. Thermistors R3 and R5 play a role in protecting the power supply. When the current is too large or the temperature is too high, the thermistor will short-circuit and burn out the fuse to ensure the stability of the subsequent circuit. In the boost module, when switch Q1 conducts and cuts off, current flows through inductors L3 and L4, and capacitors C6 and C7 are charged. When switch Q1 conducts, inductors L3 and L4 store current, and capacitors C6 and C7 discharge. When Q1 cuts off, inductors L3 and L4 discharge the stored current and raise the potential of the positive pole of the capacitor, thereby realizing voltage boost.

[0045] The drive unit includes switch Q3 and switch Q6. The drain of switch Q3 serves as the input of the drive unit. The source of switch Q3 is connected to the drain of switch Q6. The source of switch Q6 is grounded. The gates of switch Q3 and switch Q6 are externally connected to PWM signals with opposite waveforms. The drain of switch Q3 serves as the output of the drive unit and is connected to the positive pole of the primary side of transformer T1. In the figure, GATEL and GATEH are out of phase. When switch Q6 conducts, Q3 cuts off, and the output point potential is grounded. When switch Q6 cuts off, Q3 conducts and the output voltage is pulled to the output potential of the boost unit. Thus, the secondary coil is driven through the transformer. The driving of GATEL and GATEH can be referred to Figure 8 .

[0046] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0047] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiments can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0048] In the embodiments provided by the present invention, it should be understood that the disclosed device / terminal device and method can be implemented in other ways. For example, the device / terminal device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms. The units described as separate components can be or may not be physically separated, and the components displayed as units can be or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A key screen applicable to a Thunderbolt interface, comprising a power supply module and a processor, wherein the input of the power supply module is externally connected to a power supply, and the power supply module serves as the power supply for the key screen applicable to the Thunderbolt interface, characterized in that, It includes a foldable display screen and a keyboard area, and this structure is similar to that of a laptop computer. The display screen and the keyboard area are respectively on the inner surfaces of the two folding parts. The keyboard area includes a keyboard and a touchpad. The display screen and the keyboard area are respectively signal-connected to an interface module, and the interface module is used to externally connect to a host computer.

2. The key screen applicable to the thunderbolt interface according to claim 1, wherein The interface module includes multiple USB interfaces and Thunderbolt 4 interfaces. Each interface in the interface module is signal-connected to the display screen, the keyboard, and the touchpad through a data exchange circuit. The power supply module is power-connected to the interface module.

3. A key screen applicable to a lightning interface according to claim 2, characterized in that It also includes a camera module. The camera module includes a camera control circuit and a camera electrically connected to the camera control circuit. The camera control circuit is connected to the interface module through the data exchange circuit.

4. A key screen applicable to a thunderbolt interface according to claim 2, characterized in that, It also includes an audio module. The audio module includes an audio control circuit, an audio, and a microphone electrically connected to the audio control circuit. The audio control circuit is connected to the interface module through the data exchange circuit.

5. A key screen applicable to a thunderbolt interface, characterized in that, This key-screen device compatible with Thunderbolt interface is similar to a laptop computer. There are only two differences compared with a laptop computer. This key-screen device compatible with Thunderbolt interface does not have a core processor compared with a laptop computer, and there are a Thunderbolt 4 interface and a Thunderbolt 4 conversion circuit required for the Thunderbolt 4 interface; at the same time, it is compatible with using a mobile phone processor as a host and realizing reverse charging of the mobile phone.

6. The key screen applicable to a thunderbolt interface according to claim 5, wherein, This key-screen device compatible with Thunderbolt interface is similar to a laptop computer with a touchpad.

7. The key screen applicable to a thunderbolt interface according to claim 5, characterized in that, The difference compared with a laptop computer is that this key-screen device compatible with Thunderbolt interface does not have a display adapter.

8. A power control circuit, the input of the power control circuit is externally connected to a voltage source for supplying power to a subsequent stage system, characterized in that, It includes a noise reduction unit, a rectification unit, a boost unit, a drive unit, and secondary side output, tertiary side output, and quaternary side output. The input of the noise reduction unit is externally connected to external alternating current. The output of the noise reduction unit is connected to the input of the rectification unit. The output of the rectification unit is connected to the input of the boost unit. The output of the boost unit is connected to the input of the drive unit. The output of the drive unit is used as the input of the primary side of the transformer. The secondary side output, the tertiary side output, and the quaternary side output are respectively on the secondary side, tertiary side, and quaternary side of the transformer.

9. A power control circuit according to claim 8, wherein, The noise reduction unit includes inductors L1, L2 and common mode inductor L8. The input of inductor L1 is connected to an external power supply through a fuse tube. A filter capacitor and a voltage dividing resistor are arranged between inductor L1 and inductor L2. A capacitor C4 and a thermistor R5 are arranged between inductor L2 and common mode inductor L8. The output of common mode inductor L8 is connected to a rectifier BD1 of a voltage stabilizing module. The input of rectifier BD1 is also connected to a thermistor R8. The output of rectifier BD1 is connected to the boost unit. The boost unit includes an inductor group, a switch module and a capacitor module. The input of the boost unit is connected to the positive output of rectifier BD1. One end of the inductor group serves as the input of the boost unit. The other end of the inductor group is connected to the anode of diode D1 through resistor R9. The series connection point of resistor R9 and diode D1 is connected to the drain of switch Q1 between the power supply ground. The source of switch Q1 is grounded. The gate of switch Q1 is externally connected to a PWM control signal through an amplifier. The cathode of diode D1 is used as the output of the boost module through a capacitor unit parallel to the power supply ground.

10. A power control circuit according to claim 8, wherein, The drive unit includes switch Q3 and switch Q6. The drain of switch Q3 serves as the input of the drive unit. The source of switch Q3 is connected to the drain of switch Q6. The source of switch Q6 is grounded. The gates of switch Q3 and switch Q6 are externally connected to PWM signals with opposite waveforms. The drain of switch Q3 serves as the output of the drive unit and is connected to the positive pole of the primary side of transformer T1.

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