Nixie tube driving circuit, display screen and electronic equipment

Abstract

The utility model discloses a nixie tube driving circuit, a display screen and electronic equipment. The nixie tube driving circuit comprises a single first communication interface used for being connected with external equipment; the control end of the first lamp bead circuit is connected with the first communication interface, the power supply end of the first lamp bead circuit is used for being connected with a lamp bead power supply, and the first lamp bead circuit is used for working when receiving a first frequency signal output by external equipment; a first data input end of the control circuit is connected with the first communication interface, a color screen output end of the control circuit is used for being connected with a color screen, and the control circuit is used for controlling the color screen to work when receiving a second frequency signal output by the external equipment. The utility model aims to realize the control of the lamp beads and the color screen through one communication interface.

Description

Technical Field

[0001] The utility model relates to a field, in particular to a digital tube driving circuit, a display screen and an electronic device. Background Art

[0002] Most current controllers only have one or two serial communication interfaces. Adding three or four or more serial communication interfaces to a controller increases costs. The current market demands the simultaneous operation of a color screen and a multi-color light strip. With only two serial communication interfaces, one for connecting to an external memory device and the other for connecting to the color screen, this makes it impossible to simultaneously drive the color screen and the multi-color light strip. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a digital tube driving circuit, a display screen and an electronic device, aiming to realize the control of the lamp beads and the color screen through a communication interface.

[0004] The technical solution of the utility model is as follows:

[0005] A digital tube driving circuit, comprising:

[0006] A single first communication interface for connecting to an external device;

[0007] a first lamp bead circuit, wherein a control end of the first lamp bead circuit is connected to the first communication interface, a power end of the first lamp bead circuit is used to connect to a lamp bead power supply, and the first lamp bead circuit is used to operate when receiving a first frequency signal output by an external device;

[0008] A control circuit, wherein the first data input terminal of the control circuit is connected to the first communication interface, the color screen output terminal of the control circuit is used to connect to the color screen, and the control circuit is used to control the operation of the color screen when receiving a second frequency signal output by an external device.

[0009] Optionally, the first lamp bead circuit includes a plurality of first lamp beads, and the plurality of first lamp beads are connected in parallel between a lamp bead power supply and a ground electrode.

[0010] Optionally, the digital tube driving circuit further includes:

[0011] a single second communication interface for connecting to an external device;

[0012] a second lamp bead circuit, wherein a control end of the second lamp bead circuit is connected to the second communication interface, a power end of the second lamp bead circuit is used to connect to a lamp bead power supply, and the second lamp bead circuit is used to operate when receiving a third frequency signal output by an external device;

[0013] The second data input end of the control circuit is connected to the second communication interface, the data output end of the control circuit is used to connect to the memory, and the control circuit is used to read the data in the memory when receiving the fourth frequency signal output by the external device.

[0014] Optionally, the second lamp bead circuit includes a plurality of second lamp beads, and the plurality of second lamp beads are connected in parallel between a lamp bead power supply and a ground electrode.

[0015] Optionally, the digital tube driving circuit further includes:

[0016] A power supply circuit, wherein the output end of the power supply circuit is connected to the power supply end of the first lamp bead circuit, and the output end of the power supply circuit is also connected to the power supply end of the control circuit, and the power supply circuit is used to provide an operating voltage to the first lamp bead circuit and the control circuit.

[0017] Optionally, the digital tube driving circuit further includes:

[0018] A voltage stabilizing circuit, wherein the input end of the voltage stabilizing circuit is connected to the output end of the power supply circuit, the output end of the voltage stabilizing circuit is connected to the power supply end of the first lamp bead circuit, and the output end of the voltage stabilizing circuit is also connected to the power supply end of the control circuit. The voltage stabilizing circuit is used to stabilize the voltage output by the power supply circuit and output it to the first lamp bead circuit and the control circuit.

[0019] Optionally, the voltage stabilizing circuit includes a voltage stabilizing chip, a first capacitor and a second capacitor, the input end of the voltage stabilizing chip and the first end of the first capacitor are the input end of the voltage stabilizing circuit, the output end of the voltage stabilizing chip and the first end of the second capacitor are the output end of the voltage stabilizing circuit, and the ground end of the voltage stabilizing chip, the second end of the first capacitor and the second end of the second capacitor are grounded.

[0020] The present invention further provides a display screen, comprising a screen body and the digital tube drive circuit as described above, wherein the screen body is electrically connected to a control circuit in the digital tube drive circuit.

[0021] Optionally, the display screen further includes:

[0022] A memory is electrically connected to the control circuit in the digital tube drive circuit, and the memory is used to store image data for reading by the control circuit.

[0023] The present invention also provides an electronic device, comprising the display screen as described above.

[0024] The technical solution of the present utility model is to form a digital tube driving circuit through a single first communication interface, a first lamp bead circuit and a control circuit, wherein the single first communication interface is used to connect to an external device; the control end of the first lamp bead circuit is connected to the first communication interface, the power end of the first lamp bead circuit is used to connect to the lamp bead power supply, and the first lamp bead circuit can work when receiving a first frequency signal output by the external device; the first data input end of the control circuit is connected to the first communication interface, the color screen output end of the control circuit is used to connect to the color screen, and the control circuit can control the color screen to work when receiving a second frequency signal output by the external device. In this way, the digital tube driving circuit of this solution is connected to the external device by setting a single first communication interface, and the control of the lamp bead and the color screen by receiving signals of different frequencies output by the external device through the first lamp bead circuit and the control circuit. There is no need to set up multiple communication interfaces, which can reduce costs and simplify circuit structure and wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a functional module diagram of an embodiment of a digital tube driving circuit of the present invention.

[0027] Figure 2 The utility model is a circuit structure diagram of a control circuit in a digital tube driving circuit according to an embodiment of the present invention.

[0028] Figure 3 This is a circuit structure diagram of an embodiment of the first lamp bead circuit in the digital tube driving circuit of the present utility model.

[0029] Figure 4 This is a functional module diagram of another embodiment of the digital tube driving circuit of the present utility model.

[0030] Figure 5 The utility model is a circuit structure diagram of an embodiment of a voltage stabilizing circuit in a digital tube driving circuit.

[0031] Figure 6 This is a schematic diagram of the circuit structure of an embodiment of the memory in the display screen of the present invention.

[0032] Explanation of the accompanying drawings: 10, first communication interface; 20, first lamp bead circuit; 30, control circuit; 40, second communication interface; 50, second lamp bead circuit; U3, voltage regulator chip; C9, first capacitor; C10, second capacitor. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and effect of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] In the embodiments and patent claims, unless otherwise specified herein, the words "a," "an," "the," and "the" may include plural forms. If the embodiments of the present invention include descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0035] It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when an element is said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can be intermediate elements. In addition, "connected" or "coupled" as used herein can include wireless connections or wireless couplings. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0036] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0037] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0038] Most current controllers only have one or two serial communication interfaces. Adding three or four or more serial communication interfaces to a controller increases costs. The current market demands the simultaneous operation of a color screen and a multi-color light strip. With only two serial communication interfaces, one for connecting to an external memory device and the other for connecting to the color screen, this makes it impossible to simultaneously drive the color screen and the multi-color light strip.

[0039] In order to solve the above problems, the utility model proposes a digital tube driving circuit.

[0040] Reference Figure 1 In one embodiment, the digital tube driving circuit includes:

[0041] A single first communication interface 10, for connecting to an external device;

[0042] A first lamp bead circuit 20, wherein a control end of the first lamp bead circuit 20 is connected to the first communication interface 10, a power end of the first lamp bead circuit 20 is used to connect to a lamp bead power supply, and the first lamp bead circuit 20 is used to operate when receiving a first frequency signal output by an external device;

[0043] The control circuit 30 has a first data input terminal connected to the first communication interface 10, and a color screen output terminal of the control circuit 30 is used to connect to the color screen. The control circuit 30 is used to control the operation of the color screen when receiving a second frequency signal output by an external device.

[0044] In this embodiment, the first communication interface 10 can be a serial communication (Serial Peripheral Interface, abbreviated as SPI) interface, which can connect to an external device through the SPI interface, receive the data signal output by the external device, and complete the communication; the external device can be an electronic device such as a computer. The first lamp bead circuit 20 can be composed of multiple lamp beads, and the specific number of lamp beads can be set according to actual conditions and user needs. The driving frequencies of the lamp beads and the color screen are different. Multiple lamp beads can form a fantasy light strip. The fantasy light strip is a single bus protocol. For example, if a lamp bead is controlled by 24-bit data, there is no need to use a clock line to drive the lamp bead to light up. It only needs to connect the data transmission line of the SPI module (Master Out Slave In, abbreviated as MOSI). In this way, the control of the fantasy light and the color screen can share an SPI interface. The control circuit 30 can be composed of a controller and electronic components such as resistors and capacitors. The specific circuit structure of the control circuit 30 can refer to Figure 2, the parameters and numbers therein are for reference only and are not limited in this solution, and the SPI1 therein is connected to the first communication interface 10; the controller can be a digital signal processor (Digital Signal Processor, referred to as DSP), a programmable logic device (Programmable Logic Device, referred to as PLD), a field programmable gate array (Field Programmable Gate Array, referred to as FPGA), a microprocessor, an MCU microcontroller or other electronic components.

[0045] It is understandable that when the color screen is driven by SPI, the CS port, SCL port and SDA port are required, while the colorful light strip composed of multiple lamp beads in the first lamp bead circuit 20 can be driven using only one SDA port. However, the two need to be driven without interfering with each other and can be displayed simultaneously. Specifically, a first frequency signal can be output through an external device. The first frequency signal is a high-frequency signal. In this way, the signal output by the SDA port cannot be recognized by the data ports of multiple lamp beads because the frequency is too high and exceeds the timing specified by the protocol. In this way, the first frequency signal output by the external device will only drive the color screen to work, and the first lamp bead circuit 20 will not work. A second frequency signal can be output through an external device. The second frequency signal can be a low-frequency signal, such as 3MHz, and the time clock is set to about 0.3US. In this way, the data output by the MOSI of the SPI port is received by the first lamp bead circuit 20. At the same time, when outputting, the CS chip select port connected to the color screen is directly pulled high. This output signal will not be received by the color screen and will not interfere with the color screen display. The specific frequencies of the first and second frequency signals and the time clock can be set according to actual conditions and user needs, but the frequency of the first frequency signal is greater than the frequency of the second frequency signal. In this way, the light beads and the color screen can be controlled by the digital tube driving circuit of the single first communication interface 10.

[0046] The technical solution of the present utility model is to form a digital tube driving circuit through a single first communication interface 10, a first lamp bead circuit 20 and a control circuit 30, wherein the single first communication interface 10 is used to connect to an external device; the control end of the first lamp bead circuit 20 is connected to the first communication interface 10, and the power end of the first lamp bead circuit 20 is used to connect to the lamp bead power supply, and the first lamp bead circuit 20 can work when receiving a first frequency signal output by an external device; the first data input end of the control circuit 30 is connected to the first communication interface 10, and the color screen output end of the control circuit 30 is used to connect to the color screen, and the control circuit 30 can control the color screen to work when receiving a second frequency signal output by an external device. In this way, the digital tube driving circuit of this solution is connected to an external device by setting a single first communication interface 10, and the control of the lamp bead and the color screen by receiving signals of different frequencies output by the external device through the first lamp bead circuit 20 and the control circuit 30. There is no need to set up multiple communication interfaces, which can reduce costs and simplify circuit structure and wiring.

[0047] Furthermore, in another embodiment, a single SPI port can be used without mapping the input and output ports, yet still be compatible with displaying the color screen and driving the first lamp bead circuit 20 for display. The controller in the control circuit 30 can multiplex and map the pins of the SPI port so that the MOSI port of the SPI interface is multiplexed to other input and output ports of the controller. In this way, a single SPI is still used, but two input and output ports are used to drive the color screen and the first lamp bead circuit 20. Multiplexing and mapping can refer to multiple signals, data, or functions sharing the same channel at different times, locations, or states to improve resource utilization.

[0048] Reference Figure 3 In one embodiment, the first lamp bead circuit 20 includes a plurality of first lamp beads, and the plurality of first lamp beads are connected in parallel between a lamp bead power supply and a ground electrode.

[0049] In this embodiment, the first lamp bead circuit 20 can be composed of multiple first lamp beads, and the number and color of the first lamp beads can be set according to actual conditions and user needs. The first lamp bead is illustrated by the ws2812 lamp bead as an example: the control of each ws2812 lamp bead requires 24 bits of data, which is divided into 8 bits of green + 8 bits of red + 8 bits of blue. The three primary colors of each pixel can achieve 256 levels of brightness display, completing the true color display of 16777216 colors. The lamp beads are serially cascaded. After power-on reset, the controller can send a string of 24-bit data to the light strip. For example, if 10 lamps need to be lit, 10 24-bit data are sent to the first lamp. The DIN end of the first lamp receives the 24-bit data sent by the controller. The first lamp bead will extract the first 24-bit data and send the data to the data latch. The remaining data is transmitted downward through the internal shaping circuit until all lamps obtain a 24-bit data. The interval between sending these 10 24-bit data cannot exceed 50us, otherwise the next color data will be re-latched by the first one, and the complete lighting cannot be completed. It can be understood that the latch function inside the lamp bead can latch data, so that the lamp bead and the color screen can share the same first communication interface 10. Figure 3 D1 to D6 are lamp beads, but the specific number is not limited to 6. SPI represents the communication interface.

[0050] Reference Figure 4 In one embodiment, the digital tube driving circuit further includes:

[0051] a single second communication interface 40 for connecting to an external device;

[0052] A second lamp bead circuit 50, wherein a control end of the second lamp bead circuit 50 is connected to the second communication interface 40, a power end of the second lamp bead circuit 50 is used to connect to a lamp bead power supply, and the second lamp bead circuit 50 is used to operate when receiving a third frequency signal output by an external device;

[0053] The second data input terminal of the control circuit 30 is connected to the second communication interface 40, and the data output terminal of the control circuit 30 is used to connect to the memory. The control circuit 30 is used to read the data in the memory when receiving the fourth frequency signal output by the external device.

[0054] In this embodiment, the second communication interface 40 provided in the digital tube driving circuit is connected to the memory and the second lamp bead circuit 50; the specific working principle can refer to the working principle of the second communication interface 40 and the second lamp bead circuit 50; wherein the frequency of the third frequency signal is greater than the frequency of the fourth frequency signal. The memory in this embodiment can be FLASH, or it can also be an E2PROM or DDR3 type memory. The memory can store image data output by an external device, and the control circuit 30 can read the image data in the memory in the studio and control the color screen to display the corresponding image; in addition, it can refer to Figure 2 , where SPI2 is connected to the second communication interface 40.

[0055] Reference Figure 3 In one embodiment, the second lamp bead circuit 50 includes a plurality of second lamp beads, and the plurality of second lamp beads are connected in parallel between the lamp bead power supply and the ground.

[0056] In this embodiment, the specific circuit structure of the second lamp bead circuit 50 can be set with reference to the first lamp bead circuit 20, and the specific principle is the same as that of the first lamp bead circuit 20, which will not be repeated here. In this way, when the external device stores data in the memory, the second lamp bead circuit 50 can also be controlled to work.

[0057] In one embodiment, the digital tube driving circuit further includes:

[0058] A power supply circuit, wherein the output end of the power supply circuit is connected to the power supply end of the first lamp bead circuit 20, and the output end of the power supply circuit is also connected to the power supply end of the control circuit 30, and the power supply circuit is used to provide an operating voltage to the first lamp bead circuit 20 and the control circuit 30.

[0059] In this embodiment, the power supply circuit can be implemented using a DC-DC circuit or a power supply chip. The power supply circuit can convert the power supply voltage into an operating voltage suitable for the first lamp bead circuit 20 and the control circuit 30, so as to prevent the first lamp bead circuit 20 and the control circuit 30 from receiving a higher operating voltage and causing damage to the components, or receiving a lower operating voltage and causing the components to malfunction. The power supply circuit can also provide an operating voltage for the second lamp bead circuit 50.

[0060] In one embodiment, the digital tube driving circuit further includes:

[0061] A voltage stabilizing circuit, wherein the input end of the voltage stabilizing circuit is connected to the output end of the power supply circuit, the output end of the voltage stabilizing circuit is connected to the power supply end of the first lamp bead circuit 20, and the output end of the voltage stabilizing circuit is also connected to the power supply end of the control circuit 30. The voltage stabilizing circuit is used to stabilize the voltage output by the power supply circuit and output it to the first lamp bead circuit 20 and the control circuit 30.

[0062] In this embodiment, the voltage stabilizing circuit can be composed of a voltage stabilizer, such as an LDO, and electronic components such as resistors and capacitors. The voltage stabilizing circuit can convert the input voltage into a stable output voltage, ensuring that the voltage remains at a set value when the current is supplied to the load, thereby ensuring that the digital tube drive circuit can work normally.

[0063] Reference Figure 5 In an exemplary technology, the voltage stabilizing circuit includes a voltage stabilizing chip U3, a first capacitor C9, and a second capacitor C10. The input end of the voltage stabilizing chip U3 and the first end of the first capacitor C9 serve as the input end of the voltage stabilizing circuit. The output end of the voltage stabilizing chip U3 and the first end of the second capacitor C10 serve as the output end of the voltage stabilizing circuit. The ground end of the voltage stabilizing chip U3, the second end of the first capacitor C9, and the second end of the second capacitor C10 are grounded.

[0064] In this embodiment, the first capacitor C9 can filter out high-frequency noise from the power supply, ensuring that the voltage regulator chip U3 obtains a clean input voltage. Furthermore, when the load changes rapidly (such as switching transients), the first capacitor C9 can also provide transient current to the voltage regulator chip U3, helping to maintain a stable output voltage. The second capacitor C10 can help maintain the output voltage of the voltage regulator chip U3, effectively counteracting sudden effects caused by load changes, such as voltage drops when the load suddenly increases, and smoothing the output voltage, reducing high-frequency noise, and improving the signal quality of the system. The second capacitor C10 can also quickly release or absorb charge when the load current changes rapidly, helping the voltage regulator chip U3 maintain a stable voltage and ensuring the stability of the power supply.

[0065] The utility model also provides a display screen.

[0066] In one embodiment, a display screen includes a screen body and the aforementioned digital tube drive circuit, wherein the screen body is electrically connected to the control circuit 30 in the digital tube drive circuit. It is understood that the screen body may be the color screen described in the aforementioned embodiment. Since the aforementioned digital tube drive circuit is used in the display screen of the present invention, the embodiments of the display screen of the present invention include all technical solutions of all embodiments of the aforementioned digital tube drive circuit, and the technical effects achieved are identical, and therefore will not be further elaborated here.

[0067] In one embodiment, the display screen further includes:

[0068] A memory, wherein the memory is electrically connected to the control circuit 30 in the digital tube driving circuit, and the memory is used to store image data for reading by the control circuit 30.

[0069] In this embodiment, the memory can be FLASH, or E2PROM or DDR3. The memory can store image data output by the external device, and the control circuit 30 in the digital tube drive circuit can read the image data in the memory in the studio and control the color screen to display the corresponding image. The circuit structure of the memory can refer to Figure 6 The parameters and numbers are for reference only and are not limiting for this solution.

[0070] The utility model also provides an electronic device.

[0071] In one embodiment, an electronic device includes the display screen described above.

[0072] In this embodiment, it can be understood that since the above-mentioned display screen is used in the electronic device of the present invention, the embodiment of the electronic device of the present invention includes all the technical solutions of all the embodiments of the above-mentioned display screen, and the technical effects achieved are also exactly the same, which will not be repeated here. The electronic device can be an electronic cigarette, etc., and a color display screen with a colorful light strip is provided on the electronic cigarette to enhance the visual appeal of the product. The colorful lights add beauty and personalization to the electronic cigarette, and the light color and flashing mode can also be used to indicate the working status of the device, such as charging, standby, smoking or fault status, etc., and through the changes in the light, the user can get instant feedback and enhance the user experience.

[0073] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A digital tube driving circuit, characterized in that: include: A single first communication interface for connecting to an external device; a first lamp bead circuit, wherein a control end of the first lamp bead circuit is connected to the first communication interface, a power end of the first lamp bead circuit is used to connect to a lamp bead power supply, and the first lamp bead circuit is used to operate when receiving a first frequency signal output by an external device; A control circuit, wherein the first data input terminal of the control circuit is connected to the first communication interface, the color screen output terminal of the control circuit is used to connect to the color screen, and the control circuit is used to control the operation of the color screen when receiving a second frequency signal output by an external device.

2. The digital tube driving circuit according to claim 1, wherein: The first lamp bead circuit includes a plurality of first lamp beads, and the plurality of first lamp beads are connected in parallel between a lamp bead power supply and a ground electrode.

3. The digital tube driving circuit according to claim 1, wherein: The digital tube driving circuit further includes: a single second communication interface for connecting to an external device; a second lamp bead circuit, wherein a control end of the second lamp bead circuit is connected to the second communication interface, a power end of the second lamp bead circuit is used to connect to a lamp bead power supply, and the second lamp bead circuit is used to operate when receiving a third frequency signal output by an external device; The second data input end of the control circuit is connected to the second communication interface, the data output end of the control circuit is used to connect to the memory, and the control circuit is used to read the data in the memory when receiving the fourth frequency signal output by the external device.

4. The digital tube driving circuit according to claim 3, wherein: The second lamp bead circuit includes a plurality of second lamp beads, and the plurality of second lamp beads are connected in parallel between a lamp bead power supply and a ground electrode.

5. The digital tube driving circuit according to claim 1, wherein: The digital tube driving circuit further includes: A power supply circuit, wherein the output end of the power supply circuit is connected to the power supply end of the first lamp bead circuit, and the output end of the power supply circuit is also connected to the power supply end of the control circuit, and the power supply circuit is used to provide an operating voltage to the first lamp bead circuit and the control circuit.

6. The digital tube driving circuit according to claim 5, wherein: The digital tube driving circuit further includes: A voltage stabilizing circuit, wherein the input end of the voltage stabilizing circuit is connected to the output end of the power supply circuit, the output end of the voltage stabilizing circuit is connected to the power supply end of the first lamp bead circuit, and the output end of the voltage stabilizing circuit is also connected to the power supply end of the control circuit. The voltage stabilizing circuit is used to stabilize the voltage output by the power supply circuit and output it to the first lamp bead circuit and the control circuit.

7. The digital tube driving circuit according to claim 6, wherein: The voltage stabilizing circuit includes a voltage stabilizing chip, a first capacitor and a second capacitor. The input end of the voltage stabilizing chip and the first end of the first capacitor are the input end of the voltage stabilizing circuit, the output end of the voltage stabilizing chip and the first end of the second capacitor are the output end of the voltage stabilizing circuit, and the ground end of the voltage stabilizing chip, the second end of the first capacitor and the second end of the second capacitor are grounded.

8. A display screen, characterized in that: It comprises a screen body and a digital tube driving circuit as claimed in any one of claims 1 to 7, wherein the screen body is electrically connected to a control circuit in the digital tube driving circuit.

9. The display screen according to claim 8, wherein: The display screen also includes: A memory is electrically connected to the control circuit in the digital tube drive circuit, and the memory is used to store image data for reading by the control circuit.

10. An electronic device, characterized in that: The device comprises a display screen as described in any one of claims 8 to 9.

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