Gear display circuit and electronic equipment

Abstract

A gear display circuit and an electronic device belong to the technical field of electronic circuits, under the condition that an input end of a change-over switch is communicated with a second output end of the change-over switch, power supply voltage flows into a power ground through a first resistor assembly, the change-over switch, a sixth resistor assembly and a seventh resistor assembly; the power supply voltage flows into the power ground through the fourth resistor assembly and the fifth resistor assembly, the voltage of the second node is smaller than that of the first node, and the power supply module outputs the power supply voltage of a first gear; under the condition that the input end of the change-over switch is communicated with the first output end of the change-over switch, the switching circuit is disconnected, the power supply voltage flows into the power ground through the first resistor assembly, the change-over switch, the second resistor assembly and the third resistor assembly, so that the voltage of the second node is greater than the voltage of the first node, and the power supply module outputs the power supply voltage of a second gear; the indicating circuit is used for indicating according to the polarity of the voltage difference between the first node and the second node; therefore, the indication of the voltage gear is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electronic circuits, and particularly relates to a gear display circuit and an electronic device. BACKGROUND

[0002] Industrial power supplies generally have output voltage regulation requirements, and output voltage regulation is usually adjusted by a knob. In the knob adjustment mode, an indicator light is only used as a power-on indicator light, and cannot distinguish the current output voltage level. Therefore, a user cannot directly observe the current output voltage gear without using a measuring device and without connecting a load, and the voltage gear indication is not intuitive.

[0003] Therefore, there is an urgent need to provide a gear display circuit to indicate the voltage gear and improve the convenience of use. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a gear display circuit and an electronic device, and aims to solve the problem of poor convenience of use of related electronic devices.

[0005] The application provides a gear display circuit, which comprises a first resistor component, a second resistor component, a third resistor component, a fourth resistor component, a fifth resistor component, a sixth resistor component, a seventh resistor component, an indication circuit, a switching circuit, a switching switch and a power supply circuit.

[0006] An output end of the power supply circuit is connected with a first end of the first resistor component and a first end of the fourth resistor component, a second end of the first resistor component, a first end of the indication circuit and an input end of the switching switch are connected to a first node, a second end of the fourth resistor component, a second end of the indication circuit and a first end of the fifth resistor component are connected to a second node, a first output end of the switching switch is connected with a first end of the second resistor component, a second output end of the switching switch is connected with a first end of the sixth resistor component, an adjustment end of the power supply circuit is connected with a second end of the second resistor component and a first end of the third resistor component, a second end of the sixth resistor component is connected with a control end of the switching circuit and a first end of the seventh resistor component, a second end of the fifth resistor component is connected with an input end of the switching circuit, and a second end of the third resistor component, a second end of the seventh resistor component and an output end of the switching circuit are connected to a power supply ground.

[0007] The switching circuit is configured to, in response to a voltage between the seventh resistor component being greater than a preset value, connect the second end of the fifth resistor component to the power supply ground.

[0008] The indication circuit is configured to indicate according to a polarity of a voltage difference between the first node and the second node.

[0009] The power supply circuit is configured to adjust a supply voltage output from an output terminal thereof according to a voltage of an adjustment terminal thereof.

[0010] In one embodiment, the first voltage division ratio is greater than the second voltage division ratio.

[0011] The first voltage division ratio is a quotient of the first resistance value divided by the second resistance value, and the second voltage division ratio is a quotient of the third resistance value divided by the fourth resistance value.

[0012] The first resistance value is a sum of a resistance value of the sixth resistance component and a resistance value of the seventh resistance component.

[0013] The second resistance value is a sum of a resistance value of the first resistance component, a resistance value of the sixth resistance component, and a resistance value of the seventh resistance component.

[0014] The third resistance value is a resistance value of the fifth resistance component.

[0015] The fourth resistance value is a sum of a resistance value of the fourth resistance component and a resistance value of the fifth resistance component.

[0016] In one embodiment, the power supply circuit further comprises:

[0017] A first electrostatic protection circuit is connected in parallel with the third resistance component, and configured to protect an electrostatic voltage of the adjustment terminal of the power supply circuit.

[0018] In one embodiment, the power supply circuit further comprises:

[0019] A second electrostatic protection circuit is connected in parallel with the seventh resistance component, and configured to protect an electrostatic voltage of the control terminal of the switch circuit.

[0020] In one embodiment, the power supply circuit further comprises:

[0021] A first electrostatic discharge circuit is connected between the output terminal of the power supply circuit and the first output terminal of the switch, and configured to discharge an electrostatic between the output terminal of the power supply circuit and the first output terminal of the switch.

[0022] In one embodiment, the power supply circuit further comprises:

[0023] A second electrostatic discharge circuit is connected between the output terminal of the power supply circuit and the second output terminal of the switch, and configured to discharge an electrostatic between the output terminal of the power supply circuit and the control terminal of the switch circuit.

[0024] In one embodiment, the indication circuit comprises a first light emitting diode and a second light emitting diode.

[0025] The anode of the first light emitting diode and the cathode of the second light emitting diode are connected to a first node in common;

[0026] The cathode of the first light emitting diode and the anode of the second light emitting diode are connected to a second node in common.

[0027] In one of the embodiments, the first light emitting diode and the second light emitting diode have different display colors.

[0028] In one of the embodiments, the switch circuit comprises a first field effect transistor;

[0029] The drain of the first field effect transistor is connected to the fifth resistance component as an input terminal of the switch circuit;

[0030] The gate of the first field effect transistor is connected to the sixth resistance component and the seventh resistance component as a control terminal of the switch circuit;

[0031] The source of the first field effect transistor is connected to a power supply ground.

[0032] In one of the embodiments, when the input terminal of the switch and the second output terminal of the switch are in communication, the voltage across the seventh resistance component is greater than the threshold voltage of the first field effect transistor.

[0033] The embodiment of the utility model further provides an electronic equipment, the electronic equipment includes the gear display circuit above.

[0034] The embodiment of the utility model compared with prior art has the beneficial effects that: when the input terminal of the switch and the second output terminal of the switch are in communication, the switch circuit is turned on and the second terminal of the fifth resistance component is communicated to the power supply ground, on the one hand, the power supply voltage flows into the power supply ground through the first resistance component, the switch, the sixth resistance component and the seventh resistance component, on the other hand, the power supply voltage flows into the power supply ground through the fourth resistance component and the fifth resistance component, at this time, the voltage of the second node is less than the voltage of the first node, and the power supply module outputs the power supply voltage of the first gear according to the voltage of the self adjusting terminal, when the input terminal of the switch and the first output terminal of the switch are in communication, the switch circuit is disconnected, the power supply voltage flows into the power supply ground through the first resistance component, the switch, the second resistance component and the third resistance component, so that the voltage of the second node is greater than the voltage of the first node, and the power supply module outputs the power supply voltage of the second gear according to the voltage of the self adjusting terminal, so that the polarity of the voltage difference between the first node and the second node corresponds to the gear of the power supply voltage, and the indicating circuit indicates according to the polarity of the voltage difference between the first node and the second node, so as to realize the indication of the voltage gear, and improve the convenience of use. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to make the technical solutions of the embodiments of the present application clearer, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0036] Figure 1 A structural schematic diagram of the gear display circuit provided by an embodiment of the present application is shown in FIG. 1.

[0037] Figure 2 Another structural schematic diagram of the gear display circuit provided by an embodiment of the present application is shown in FIG. 2.

[0038] Figure 3 Another structural schematic diagram of the gear display circuit provided by an embodiment of the present application is shown in FIG. 3.

[0039] Figure 4 Another structural schematic diagram of the gear display circuit provided by an embodiment of the present application is shown in FIG. 4.

[0040] Figure 5 Another structural schematic diagram of the gear display circuit provided by an embodiment of the present application is shown in FIG. 5.

[0041] Figure 6 A partial example circuit schematic diagram of the gear display circuit provided by an embodiment of the present application is shown in FIG. 6. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0043] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise explicitly and specifically limited.

[0046] Figure 1 The structure schematic diagram of the gear display circuit provided by the preferred embodiment of the present application is shown, only the parts related to the present embodiment are shown for the convenience of description, and the details are described as follows:

[0047] The gear display circuit includes a first resistor component 01, a second resistor component 02, a third resistor component 03, a fourth resistor component 04, a fifth resistor component 05, a sixth resistor component 06, a seventh resistor component 07, an indication circuit 08, a switch circuit 09, a switching switch U1 and a power supply circuit 10.

[0048] The output end of the power supply circuit 10 is connected with the first end of the first resistor component 01 and the first end of the fourth resistor component 04, the second end of the first resistor component 01, the first end of the indication circuit 08 and the input end of the switching switch U1 are connected to a first node, the second end of the fourth resistor component 04, the second end of the indication circuit 08 and the first end of the fifth resistor component 05 are connected to a second node, the first output end of the switching switch U1 is connected with the first end of the second resistor component 02, the second output end of the switching switch U1 is connected with the first end of the sixth resistor component 06, the adjusting end of the power supply circuit 10 is connected with the second end of the second resistor component 02 and the first end of the third resistor component 03, the second end of the sixth resistor component 06 is connected with the control end of the switch circuit 09 and the first end of the seventh resistor component 07, the second end of the fifth resistor component 05 is connected with the input end of the switch circuit 09, the second end of the third resistor component 03, the second end of the seventh resistor component 07 and the output end of the switch circuit 09 are connected to a power supply ground.

[0049] The switch circuit 09 is used for connecting the second end of the fifth resistor component 05 to the power supply ground in response to the voltage across the seventh resistor component 07 being greater than a preset value.

[0050] The indication circuit 08 is used for indicating according to the polarity of the voltage difference between the first node and the second node.

[0051] The power supply circuit 10 is used for adjusting the power supply voltage output from the output end thereof according to the voltage connected to the adjusting end thereof.

[0052] It should be noted that the indication circuit 08 is configured to perform a first indication in response to the voltage at the first node being greater than the voltage at the second node, and perform a second indication in response to the voltage at the first node being less than the voltage at the second node.

[0053] The power supply circuit 10 is configured to output a first gear supply voltage from the self output end in response to the voltage at the self regulating end being less than the preset voltage, and output a second gear supply voltage from the self output end in response to the voltage at the self regulating end being greater than or equal to the preset voltage.

[0054] It can be understood that the above gear display circuit has two working states.

[0055] In the first state, the input end of the switch U1 is connected to the second output end of the switch U1, the voltage across the seventh resistor 07 is greater than the preset value, and the switch circuit 09 is turned on and connects the second end of the fifth resistor 05 to the power supply ground; on the one hand, the supply voltage flows into the power supply ground through the first resistor 01, the switch U1, the sixth resistor 06 and the seventh resistor 07, and on the other hand, the supply voltage flows into the power supply ground through the fourth resistor 04 and the fifth resistor 05, at this time, the voltage at the second node is less than the voltage at the first node, and the voltage at the regulating end of the power supply module is 0, the power supply module outputs the first gear supply voltage, and the indication circuit 08 performs the first indication according to the first gear supply voltage.

[0056] In the second state, the input end of the switch U1 is connected to the first output end of the switch U1, the voltage across the seventh resistor 07 is 0 (less than the preset value), and the switch circuit 09 is turned off; the supply voltage flows into the power supply ground through the first resistor 01, the switch U1, the second resistor 02 and the third resistor 03, so that the voltage at the second node is greater than the voltage at the first node, and the voltage at the regulating end of the power supply module is the voltage division of the supply voltage on the third resistor 03, the power supply module outputs the second gear supply voltage, and the indication circuit 08 performs the second indication according to the second gear supply voltage.

[0057] It is worth emphasizing that the first voltage division ratio is greater than the second voltage division ratio.

[0058] The first voltage division ratio is the quotient of the first resistance value divided by the second resistance value, and the second voltage division ratio is the quotient of the third resistance value divided by the fourth resistance value; the first resistance value is the sum of the resistance value of the sixth resistor 06 and the resistance value of the seventh resistor 07; the second resistance value is the sum of the resistance value of the first resistor 01, the resistance value of the sixth resistor 06 and the resistance value of the seventh resistor 07; the third resistance value is the resistance value of the fifth resistor 05; and the fourth resistance value is the sum of the resistance value of the fourth resistor 04 and the resistance value of the fifth resistor 05.

[0059] According to the technical scheme, in the case that the input end of the switch U1 is in communication with the second output end of the switch U1, the voltage of the first node is greater than the voltage of the second node; and in the case that the input end of the switch U1 is in communication with the first output end of the switch U1, the voltage of the first node is less than the voltage of the second node; therefore, the indication circuit 08 can perform different indications according to the communication position of the switch U1, thereby realizing gear display.

[0060] As shown in Figure 2 , the gear display circuit further comprises a first electrostatic protection circuit 11.

[0061] The first electrostatic protection circuit 11 is connected in parallel with the third resistor assembly 03, and is used for electrostatic protection of the voltage of the adjusting end of the power supply circuit 10.

[0062] According to the technical scheme, the possibility of damaging the circuit by static electricity generated by the user in the process of adjusting the voltage is reduced, and the reliability and safety of the gear display circuit are improved.

[0063] As shown in Figure 3 , the gear display circuit further comprises a second electrostatic protection circuit 12.

[0064] The second electrostatic protection circuit 12 is connected in parallel with the seventh resistor assembly 07, and is used for electrostatic protection of the voltage of the control end of the switch circuit 09.

[0065] According to the technical scheme, the possibility of damaging the circuit by static electricity generated by the user in the process of adjusting the voltage is reduced, and the reliability and safety of the gear display circuit are improved.

[0066] As shown in Figure 4 , the gear display circuit further comprises a first electrostatic discharge circuit 13.

[0067] The first electrostatic discharge circuit 13 is connected between the output end of the power supply circuit 10 and the first output end of the switch U1, and is used for discharging static electricity between the output end of the power supply circuit 10 and the first output end of the switch U1.

[0068] According to the technical scheme, the first output end of the switch U1 discharges static electricity energy to the output end of the power supply circuit 10 in one direction, the possibility of the adjusting end of the power supply circuit 10 being struck by static electricity is reduced, and the reliability and safety of the gear display circuit are improved.

[0069] As shown in Figure 5 , the gear display circuit further comprises a second electrostatic discharge circuit 14.

[0070] The second electrostatic discharge circuit 14 is connected between the output end of the power supply circuit 10 and the second output end of the switch U1, and is used for discharging electrostatic between the output end of the power supply circuit 10 and the control end of the switch circuit 09.

[0071] By the above technical solution, the second output end of the switch U1 discharges electrostatic energy to the output end of the power supply circuit 10 in one direction, the possibility of the switch tube in the switch circuit 09 being electrostatically punctured is reduced, and the reliability and safety of the gear display circuit are improved.

[0072] Figure 6 Part of the gear display circuit provided by the embodiment of the utility model is shown, only part related to the embodiment of the utility model is shown for convenience of description, and details are as follows:

[0073] The indication circuit 08 includes a first light emitting diode LED1 and a second light emitting diode LED2.

[0074] The positive electrode of the first light emitting diode LED1 and the negative electrode of the second light emitting diode LED2 are connected to a first node; the negative electrode of the first light emitting diode LED1 and the positive electrode of the second light emitting diode LED2 are connected to a second node; wherein the first light emitting diode LED1 and the second light emitting diode LED2 have different display colors.

[0075] It can be understood that the first light emitting diode LED1 and the second light emitting diode LED2 have different display colors, and the indication circuit 08 is specifically used for indicating different colors according to the polarity of the pressure difference between the first node and the second node.

[0076] The switch circuit 09 includes a first field effect tube M1.

[0077] The drain of the first field effect tube M1 is used as the input end of the switch circuit 09 and is connected with the fifth resistance component 05; the gate of the first field effect tube M1 is used as the control end of the switch circuit 09 and is connected with the sixth resistance component 06 and the seventh resistance component 07; and the source of the first field effect tube M1 is connected with the power supply ground.

[0078] The switch circuit 09 is simple and reliable.

[0079] It should be noted that in the case that the input end of the switch U1 is in communication with the second output end of the switch U1, the voltage across the seventh resistance component 07 is greater than the threshold voltage of the first field effect tube M1.

[0080] In the case that the input end of the switch U1 is in communication with the second output end of the switch U1, the supply voltage flows into the power supply ground through the first resistance component 01, the switch U1, the sixth resistance component 06 and the seventh resistance component 07, at this time, the first resistance component 01, the sixth resistance component 06 and the seventh resistance component 07 need to be configured so that the voltage across the seventh resistance component 07 is greater than the threshold voltage of the first field effect tube M1, so as to control the first field effect tube M1 to be turned on.

[0081] The first resistance component 01 includes a first resistance R1, the second resistance component 02 includes a second resistance R2, the third resistance component 03 includes a third resistance R3, the fourth resistance component 04 includes a fourth resistance R4, the fifth resistance component 05 includes a fifth resistance R5, the sixth resistance component 06 includes a sixth resistance R6, and the seventh resistance component 07 includes a seventh resistance R7.

[0082] The first electrostatic protection circuit 11 includes a first TVS tube TVS1, and the second electrostatic protection circuit 12 includes a second TVS tube TVS2.

[0083] It can be understood that the turn-on voltage of the second TVS tube TVS2 is greater than the threshold voltage of the first field effect tube M1.

[0084] The first electrostatic discharge circuit 13 includes a first diode D1; the positive electrode of the first diode D1 is connected with the first output end of the switch U1, and the negative electrode of the first diode D1 is connected with the output end of the power supply circuit 10.

[0085] The second electrostatic discharge circuit 14 includes a second diode D2; the positive electrode of the second diode D2 is connected with the second output end of the switch U1, and the negative electrode of the second diode D2 is connected with the output end of the power supply circuit 10.

[0086] The working principle of the power supply circuit 10 will be further described below in combination with the drawings. Figure 6 The working principle of the power supply circuit 10 will be further described below in combination with the drawings.

[0087] Figure 6 The gear display circuit has two working states.

[0088] In the first case, the input end of the switch U1 is communicated with the second output end of the switch U1, the voltage across the seventh resistor R7 is greater than the preset value (i.e. greater than the threshold voltage of the first field effect transistor M1), the first field effect transistor M1 is turned on and the second end of the fifth resistor R5 is communicated to the power supply ground; on the one hand, the supply voltage flows into the power supply ground through the first resistor R1, the switch U1, the sixth resistor R6 and the seventh resistor R7, on the other hand, the supply voltage flows into the power supply ground through the fourth resistor R4 and the fifth resistor R5, since the voltage of the second node is less than the voltage of the first node at this time, and the voltage of the adjusting end of the power module is 0, the power module outputs the first gear supply voltage, and the first light emitting diode LED1 performs the first indication.

[0089] In the second case, the input end of the switch U1 is communicated with the first output end of the switch U1, the voltage across the seventh resistor R7 is 0 (less than the preset value, i.e. less than the threshold voltage of the first field effect transistor M1), the first field effect transistor M1 is cut off; the supply voltage flows into the power supply ground through the first resistor R1, the switch U1, the second resistor R2 and the third resistor R3, so that the voltage of the second node is greater than the voltage of the first node, and the supply voltage also reaches the first node through the fourth resistor R4 and the second light emitting diode LED2; at the same time, the voltage of the adjusting end of the power module is the voltage division of the supply voltage on the third resistor assembly 03, the power module outputs the second gear supply voltage, and the second light emitting diode LED2 performs the second indication.

[0090] The embodiment of the utility model further provides an electronic equipment, the electronic equipment includes gear display circuit above.

[0091] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the application.

[0092] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A gear display circuit, characterized by comprising: The first resistance component, the second resistance component, the third resistance component, the fourth resistance component, the fifth resistance component, the sixth resistance component, the seventh resistance component, the indication circuit, the switch circuit, the switching switch and the power supply circuit are included; The output end of the power supply circuit is connected with the first end of the first resistance component and the first end of the fourth resistance component, the second end of the first resistance component, the first end of the indication circuit and the input end of the switching switch are connected to a first node, the second end of the fourth resistance component, the second end of the indication circuit and the first end of the fifth resistance component are connected to a second node, the first output end of the switching switch is connected with the first end of the second resistance component, the second output end of the switching switch is connected with the first end of the sixth resistance component, the adjusting end of the power supply circuit is connected with the second end of the second resistance component and the first end of the third resistance component, the second end of the sixth resistance component is connected with the control end of the switch circuit and the first end of the seventh resistance component, the second end of the fifth resistance component is connected with the input end of the switch circuit, the second end of the third resistance component, the second end of the seventh resistance component and the output end of the switch circuit are connected to a power supply ground; The switch circuit is used for connecting the second end of the fifth resistance component to the power supply ground when the voltage between the seventh resistance component is greater than a preset value; The indication circuit is used for indicating according to the polarity of the voltage difference between the first node and the second node; The power supply circuit is used for adjusting the supply voltage output from the output end according to the voltage connected to the adjusting end.

2. The range display circuit of claim 1, wherein, The first voltage division ratio is greater than the second voltage division ratio; The first voltage division ratio is the quotient of the first resistance value and the second resistance value, and the second voltage division ratio is the quotient of the third resistance value and the fourth resistance value; The first resistance value is the sum of the resistance value of the sixth resistance component and the resistance value of the seventh resistance component; The second resistance value is the sum of the resistance value of the first resistance component, the resistance value of the sixth resistance component and the resistance value of the seventh resistance component; The third resistance value is the resistance value of the fifth resistance component; The fourth resistance value is the sum of the resistance value of the fourth resistance component and the resistance value of the fifth resistance component.

3. The range display circuit of claim 1, wherein, Further comprising: The first electrostatic protection circuit is connected in parallel with the third resistance component, and is used for electrostatic protection of the voltage of the adjusting end of the power supply circuit.

4. The range display circuit of claim 1, wherein, Further comprising: The second electrostatic protection circuit is connected in parallel with the seventh resistance component, and is used for electrostatic protection of the voltage of the control end of the switch circuit.

5. The range display circuit of claim 1, wherein, Further comprising: The first electrostatic discharge circuit is connected between the output end of the power supply circuit and the first output end of the switching switch, and is used for discharging electrostatic between the output end of the power supply circuit and the first output end of the switching switch.

6. The range display circuit of claim 1, wherein, Further comprising: The second electrostatic discharge circuit is connected between the output end of the power supply circuit and the second output end of the switching switch, and is used for discharging electrostatic between the output end of the power supply circuit and the control end of the switch circuit.

7. The range display circuit of claim 1, wherein, The indication circuit includes a first light emitting diode and a second light emitting diode; The anode of the first light emitting diode and the cathode of the second light emitting diode are connected to a first node; The cathode of the first light emitting diode and the anode of the second light emitting diode are connected to a second node.

8. The range display circuit of claim 7, wherein, The first light emitting diode and the second light emitting diode have different display colors.

9. The range display circuit of claim 1, wherein, The switch circuit comprises a first field effect transistor; The drain of the first field effect transistor is connected to the fifth resistance component as an input terminal of the switch circuit; The gate of the first field effect transistor is connected to the sixth resistance component and the seventh resistance component as a control terminal of the switch circuit; The source of the first field effect transistor is connected to a power supply ground.

10. The range display circuit of claim 9, wherein, When the input terminal of the switch is in communication with the second output terminal of the switch, the voltage across the seventh resistance component is greater than the threshold voltage of the first field effect transistor.

11. An electronic device, comprising: The electronic device comprises the gear display circuit according to any one of claims 1 to 10.

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