A driving system and a driving method for an indicator light
By using the drive circuit in the multiplexer and indicator light driver unit, multiple indicator lights are controlled by a combination of NPN and PNP transistor states, which solves the problem of insufficient controller I/O ports and realizes low-cost multi-indicator light control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DONGFENG AUTOMOBILE COMPANY
- Filing Date
- 2022-12-30
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, each I/O port of the controller can only control one indicator light, which requires a large number of I/O interfaces when there are many indicator lights, thus increasing the cost of the controller.
The indicator light driver unit connects to the controller's I/O interface via a multiplexer and uses multiple drive circuits to control the lighting and extinguishing of multiple indicator lights using a combination of NPN and PNP transistors, thus enabling one I/O interface to drive multiple indicator lights.
This reduces the cost of the controller while ensuring the functionality of the indicator lights, enabling control of multiple indicator lights through a single I/O interface.
Smart Images
Figure CN116133195B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic and electrical control technology, and in particular to a driving system and driving method for an indicator light. Background Technology
[0002] In related technologies, two methods are typically used to drive indicator lights to turn on or off. The first method involves equipping the unit to which the indicator light belongs with CAN or LIN communication capabilities. The controller communicates with the unit via the CAN or LIN bus, sending commands to turn the indicator light on or off. Upon receiving the command, the unit drives the corresponding indicator light to turn on or off accordingly. This first method requires both the unit to which the indicator light belongs and the controller to have network communication capabilities, necessitating hardware components for network communication, resulting in higher costs in practical applications.
[0003] The second method involves connecting an indicator light to a controller I / O port, directly driving the corresponding indicator light to turn on or off through different I / O ports on the controller. In this second method, one I / O port on the controller can only connect to one indicator light. When there are many indicator lights, the controller needs a corresponding number of I / O interfaces to control the on / off state of each indicator light. Therefore, this method requires a higher number of I / O ports on the controller, increasing the controller's cost.
[0004] Therefore, how to drive more indicator lights using fewer controller I / O interfaces than the number of indicator lights is a technical problem that needs to be solved. Summary of the Invention
[0005] The main purpose of this application is to provide a driving system and driving method for indicator lights, aiming to solve the technical problem in related technologies that each I / O port of the controller can only control one indicator light.
[0006] In a first aspect, this application provides an indicator light driving system, the system comprising:
[0007] A multiplexer (1), one end of which is connected to the I / O interface of the controller and is used to control the closing or opening of multiple switches inside it according to the control information of the controller.
[0008] The indicator light driving unit (2) includes multiple driving circuits. The first end of each driving circuit is connected to the switch in the multiplexer (1), and the second end of each driving circuit is connected to multiple indicator lights. The indicator light driving unit (2) is used to drive multiple indicator lights to light up according to the combination of the closed or open states of the multiple switches in the multiplexer (1) through multiple driving circuits.
[0009] In some embodiments, when the number of switches in the multiplexer (1) is N, the number of indicator lights is at most 2. N indivual.
[0010] In some embodiments, each drive circuit includes an NPN transistor or a PNP transistor.
[0011] In some embodiments, when the multiplexer (1) is a dual-channel switch, it includes a first switch (11) and a second switch (12);
[0012] The indicator light driving unit (2) includes 6 driving circuits and 4 indicator lights;
[0013] The first driving circuit (21) of the indicator light driving unit (2) is configured to be turned on when the first switch (11) is closed and in a high-level state and the second switch (12) is open and in a floating state, so as to light up the first indicator light (31).
[0014] The second driving circuit (22) of the indicator light driving unit (2) is configured to be turned on when the first switch (11) is open and in a floating state, and the second switch (12) is closed and in a high-level state, so as to light up the second indicator light (32);
[0015] The third driving circuit (23) and the fourth driving circuit (24) of the indicator light driving unit (2) are configured to be turned on when the first switch (11) is closed and in a high-level state and the second switch (12) is closed and in a high-level state, so as to light up the third indicator light (33);
[0016] The fifth driving circuit (25) and the sixth driving circuit (26) of the indicator light driving unit (2) are configured to be turned on when the first switch (11) is open and in a floating state, and the second switch (12) is open and in a floating state, so as to illuminate the fourth indicator light (34).
[0017] In some embodiments, the first end of the first driving circuit (21) is connected to the first switch (11), and the second end is connected to the first indicator light (31). The first driving circuit (21) includes an NPN transistor.
[0018] The first end of the second driving circuit (22) is connected to the second switch (12), and the second end is connected to the second indicator light (32). The second driving circuit (22) includes an NPN transistor.
[0019] The first end of the third driving circuit (23) is connected to the first switch (11), and the second end is connected to the third indicator light (33). The third driving circuit (23) includes an NPN transistor.
[0020] The first end of the fourth driving circuit (24) is connected to the second switch (12). The fourth driving circuit (24) includes an NPN transistor. The collector of the NPN transistor in the fourth driving circuit (24) is connected to the emitter of the NPN transistor in the third driving circuit (23).
[0021] The first end of the fifth driving circuit (25) is connected to the first switch (11), and the second end is connected to the fourth indicator light (34). The fifth driving circuit (25) includes a PNP transistor.
[0022] The first end of the sixth driving circuit (26) is connected to the second switch (12). The sixth driving circuit (26) includes a PNP transistor. The collector of the PNP transistor in the sixth driving circuit (26) is connected to the emitter of the PNP transistor in the fifth driving circuit (25).
[0023] Secondly, this application also provides a method for driving an indicator light, the method comprising:
[0024] Each switch in the multiplexer (1) is controlled to close or open.
[0025] Based on the combination of the closed or open states of multiple switches in the multiple-way switch (1), multiple indicator lights are driven to light up by multiple driving circuits in the indicator light driving unit (2) that connect the multiple-way switch (1) and multiple indicator lights.
[0026] In some embodiments, when the number of switches in the multiplexer (1) is N, the number of indicator lights is at most 2. N indivual.
[0027] In some embodiments, each drive circuit includes an NPN transistor or a PNP transistor.
[0028] In some embodiments, the step of driving multiple indicator lights to illuminate via multiple drive circuits in the indicator light drive unit (2) for connecting the multiple switch (1) and multiple indicator lights based on a combination of the closed or open states of multiple switches in the multiple switch (1) includes:
[0029] When the multiplexer (1) is a dual-way switch, it includes a first switch (11) and a second switch (12);
[0030] The indicator light driving unit (2) includes 6 driving circuits and 4 indicator lights;
[0031] When the first switch (11) is closed and in a high-level state, and the second switch (12) is open and in a floating state, the first driving circuit (21) is turned on to light up the first indicator light (31);
[0032] When the first switch (11) is open and in a floating state, and the second switch (12) is closed and in a high-level state, the second driving circuit (22) is turned on to light up the second indicator light (32);
[0033] When the first switch (11) is closed and in a high-level state, and the second switch (12) is closed and in a high-level state, the third driving circuit (23) and the fourth driving circuit (24) are turned on to illuminate the third indicator light (33);
[0034] When the first switch (11) is open and in a floating state, and the second switch (12) is open and in a floating state, the fifth driving circuit (25) and the sixth driving circuit (26) are turned on to illuminate the fourth indicator light (34).
[0035] In some embodiments, before driving multiple indicator lights to illuminate via multiple drive circuits in the indicator light drive unit (2) that connect the multiple switches (1) and multiple indicator lights according to the combination of closed or open states of multiple switches in the multiplex switch (1), the method further includes:
[0036] The first end of the first driving circuit (21) is connected to the first switch (11), and the second end is connected to the first indicator light (31). The first driving circuit (21) includes an NPN transistor.
[0037] The first end of the second driving circuit (22) is connected to the second switch (12), and the second end is connected to the second indicator light (32). The second driving circuit (22) includes an NPN transistor.
[0038] The first end of the third driving circuit (23) is connected to the first switch (11), and the second end is connected to the third indicator light (33). The third driving circuit (23) includes an NPN transistor.
[0039] The first end of the fourth driving circuit (24) is connected to the second switch (12). The fourth driving circuit (24) includes an NPN transistor. The collector of the NPN transistor in the fourth driving circuit (24) is connected to the emitter of the NPN transistor in the third driving circuit (23).
[0040] The first end of the fifth driving circuit (25) is connected to the first switch (11), and the second end is connected to the fourth indicator light (34). The fifth driving circuit (25) includes a PNP transistor.
[0041] The first end of the sixth driving circuit (26) is connected to the second switch (12). The sixth driving circuit (26) includes a PNP transistor. The collector of the PNP transistor in the sixth driving circuit (26) is connected to the emitter of the PNP transistor in the fifth driving circuit (25).
[0042] This application provides a driving system and method for indicator lights. The system includes: a multiplexer, one end of which is connected to the I / O interface of a controller and used to control the closure or opening of multiple internal switches according to the control information of the controller; and an indicator light driving unit, which includes multiple driving circuits, the first end of each driving circuit being connected to a switch in the multiplexer, and the second end of each driving circuit being connected to multiple indicator lights. The indicator light driving unit is used to drive multiple indicator lights to illuminate according to the combination of the closed or open states of the multiple switches in the multiplexer. This allows more indicator lights to be driven through a single I / O interface of the controller, reducing the controller cost while ensuring the functionality of the indicator lights. Attached Figure Description
[0043] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0044] Figure 1 This is a schematic diagram of the structure of a driving system for an indicator light provided in an embodiment of this application;
[0045] Figure 2 This is a flowchart illustrating a method for driving an indicator light, as provided in an embodiment of this application.
[0046] In the diagram: 1. Multiplexer; 11. First switch; 12. Second switch; 2. Indicator light driver unit; 21. First driver circuit; 22. Second driver circuit; 23. Third driver circuit; 24. Fourth driver circuit; 25. Fifth driver circuit; 26. Sixth driver circuit; 31. First indicator light; 32. Second indicator light; 33. Third indicator light; 34. Fourth indicator light.
[0047] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0049] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.
[0050] This application provides a driving system and driving method for an indicator light.
[0051] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0052] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of an indicator light driving system provided in an embodiment of this application.
[0053] like Figure 1 As shown, the system includes:
[0054] A multiplexer 1, one end of which is connected to the I / O interface of the controller, and is used to control the closing or opening of multiple internal switches according to the control information of the controller.
[0055] The indicator light driving unit 2 includes multiple driving circuits. The first end of each driving circuit is connected to a switch in the multiplexer 1, and the second end of each driving circuit is connected to multiple indicator lights. The indicator light driving unit 2 is used to drive multiple indicator lights to light up according to the combination of the closed or open states of the multiple switches in the multiplexer 1 through the multiple driving circuits.
[0056] It is worth noting that the multiplexer 1 is a switching unit formed by multiple switches connected in parallel. When the switching unit includes two switches, there are four possible combinations: first switch 11 closed, second switch 12 open; first switch 11 open, second switch 12 closed; first switch 11 closed, second switch 12 closed; first switch 11 open, second switch 12 open. Therefore, four indicator lights can be driven separately. Similarly, when the multiplexer 1 includes three switches, there are eight possible combinations, and each of the three switches can drive eight indicator lights. Therefore, when the number of switches in the multiplexer 1 is N, the number of indicator lights is at most 2. N indivual.
[0057] In some embodiments, each drive circuit includes either an NPN transistor or a PNP transistor. The NPN transistor conducts when the voltage level is high and is cut off when the voltage level is floating, while the PNP transistor is cut off when the voltage level is high and conducts when the voltage level is floating. When the switch is closed, the switch port is in a high-level state; when the switch is open, the switch port is in a floating state. The transistors in the drive circuit can turn on or off according to the voltage level of the switch, thereby driving the indicator light to light up or turn off.
[0058] As a preferred display method, this embodiment describes the case where the multiplexer 1 includes two switches, but the number of switches in the multiplexer 1 is not limited to two, and can also be one, three or more.
[0059] When the multiplexer 1 is a dual-channel switch, it includes a first switch 11 and a second switch 12; the indicator light driving unit 2 includes 6 driving circuits and 4 indicator lights. The indicator light driving unit 2 includes: a first driving circuit 21, a second driving circuit 22, a third driving circuit 23, a fourth driving circuit 24, a fifth driving circuit 25, and a sixth driving circuit 26. The 4 indicator lights are respectively: a first indicator light 31, a second indicator light 32, a third indicator light 33, and a fourth indicator light 34.
[0060] The first driving circuit 21 of the indicator light driving unit 2 is configured to conduct when the first switch 11 is closed and in a high-level state, and the second switch 12 is open and in a floating state, so as to light up the first indicator light 31 and turn off the other indicator lights.
[0061] The second driving circuit 22 of the indicator light driving unit 2 is configured to conduct when the first switch 11 is open and in a floating state, and the second switch 12 is closed and in a high-level state, so as to light up the second indicator light 32 and turn off the other indicator lights.
[0062] The third driving circuit 23 and the fourth driving circuit 24 of the indicator light driving unit 2 are configured to conduct when the first switch 11 is closed and in a high-level state, and the second switch 12 is closed and in a high-level state, so as to light up the third indicator light 33 and turn off the other indicator lights.
[0063] The fifth driving circuit 25 and the sixth driving circuit 26 of the indicator light driving unit 2 are configured to be turned on when the first switch 11 is open and in a floating state, and the second switch 12 is open and in a floating state, so as to light up the fourth indicator light 34 and turn off the other indicator lights.
[0064] If "1" represents a high level switch state and "0" represents a floating switch state, the correspondence between the states of the first switch 11 and the second switch 12 and the indicator light states is shown in Table 1.
[0065] Table 1. Correspondence between switch status and indicator light status
[0066]
[0067] In a preferred embodiment, the first end of the first driving circuit 21 is connected to the first switch 11, and the second end is connected to the first indicator light 31. The first driving circuit 21 includes an NPN transistor.
[0068] The first end of the second driving circuit 22 is connected to the second switch 12, and the second end is connected to the second indicator light 32. The second driving circuit 22 includes an NPN transistor.
[0069] The first end of the third driving circuit 23 is connected to the first switch 11, and the second end is connected to the third indicator light 33. The third driving circuit 23 includes an NPN transistor.
[0070] The first terminal of the fourth driving circuit 24 is connected to the second switch 12. The fourth driving circuit 24 includes an NPN transistor, and the collector of the NPN transistor in the fourth driving circuit 24 is connected to the emitter of the NPN transistor in the third driving circuit 23.
[0071] The first end of the fifth driving circuit 25 is connected to the first switch 11, and the second end is connected to the fourth indicator light 34. The fifth driving circuit 25 includes a PNP transistor.
[0072] The first terminal of the sixth driving circuit 26 is connected to the second switch 12. The sixth driving circuit 26 includes a PNP transistor, and the collector of the PNP transistor in the sixth driving circuit 26 is connected to the emitter of the PNP transistor in the fifth driving circuit 25.
[0073] The control logic in this embodiment is as follows:
[0074] When the first switch 11 is closed and the second switch 12 is open, the output port of the first switch 11 is at a high level and the output port of the second switch 12 is in a floating state. At this time, the NPN transistor in the first driving circuit 21 is turned on, and the transistors in the other driving circuits are in a cut-off state. Therefore, the first indicator light 31 is lit, and the other indicator lights are off.
[0075] When the first switch 11 is open and the second switch 12 is closed, the output port of the first switch 11 is in a floating state and the output port of the second switch 12 is at a high level. At this time, the NPN transistor in the second drive circuit 22 is turned on, and the transistors in the other drive circuits are in a cut-off state. Therefore, the second indicator light 32 is lit, and the other indicator lights are off.
[0076] When the first switch 11 and the second switch 12 are closed, the output ports of both switches are at a high level. At this time, the NPN transistors in the third and fourth driving circuits 23 and 24 are turned on, while the transistors in the other driving circuits are turned off. Therefore, the third indicator light 33 is lit, and the other indicator lights are off. Because the NPN transistors in the third and fourth driving circuits 23 and 24 are connected, both the first and second switches 11 and 12 must be at a high level simultaneously for the third indicator light 33 to light up.
[0077] When both the first switch 11 and the second switch 12 are open, the output ports of both switches are floating. At this time, the PNP transistors in the fifth drive circuit 25 and the sixth drive circuit 26 are turned on, while the transistors in the other drive circuits are turned off. Therefore, the fourth indicator light 34 is lit, and the other indicator lights are off. Because the PNP transistors in the fifth drive circuit 25 and the sixth drive circuit 26 are connected, both the first switch 11 and the second switch 12 must be floating and simultaneously turned on for the fourth indicator light 34 to light up.
[0078] This application embodiment connects a multiplexer to the controller's I / O interface and an indicator light driver unit, which includes multiple drive circuits, to the multiplexer. This allows the controller to control multiple switches in the multiplexer to open or close through a single I / O interface. Furthermore, the NPN or PNP transistors in the drive circuits control the indicator lights to turn on or off based on the switch's voltage level. This enables the control of multiple indicator lights through a single controller I / O interface, reducing controller costs while ensuring the indicator light functionality.
[0079] like Figure 2As shown in the embodiment of this application, a method for driving an indicator light is also provided, the method comprising:
[0080] Step S1: Control the multiple switches in the multiplexer 1 to close or open respectively.
[0081] Step S2: Based on the combination of the closed or open states of the multiple switches in the multiple-way switch 1, the multiple driving circuits in the indicator light driving unit 2, which are used to connect the multiple-way switch 1 and the multiple indicator lights, are used to drive the multiple indicator lights to light up.
[0082] In some embodiments, when the number of switches in the multiplexer 1 is N, the number of indicator lights is at most 2. N indivual.
[0083] In some embodiments, each drive circuit includes an NPN transistor or a PNP transistor.
[0084] In some embodiments, the step of driving multiple indicator lights to illuminate based on a combination of the closed or open states of multiple switches in the multiplex switch 1 via multiple drive circuits in the indicator light drive unit 2 for connecting the multiplex switch 1 and multiple indicator lights includes:
[0085] When the multiplexer 1 is a dual-channel switch, it includes a first switch 11 and a second switch 12;
[0086] The indicator light driving unit 2 includes 6 driving circuits and 4 indicator lights;
[0087] When the first switch 11 is closed and in a high-level state, and the second switch 12 is open and in a floating state, the first driving circuit 21 is turned on to illuminate the first indicator light 31.
[0088] When the first switch 11 is open and in a floating state, and the second switch 12 is closed and in a high-level state, the second driving circuit 22 is turned on to illuminate the second indicator light 32.
[0089] When the first switch 11 is closed and in a high-level state, and the second switch 12 is closed and in a high-level state, the third driving circuit 23 and the fourth driving circuit 24 are turned on to illuminate the third indicator light 33.
[0090] When the first switch 11 is open and in a floating state, and the second switch 12 is open and in a floating state, the fifth driving circuit 25 and the sixth driving circuit 26 are turned on to illuminate the fourth indicator light 34.
[0091] In some embodiments, before driving multiple indicator lights to illuminate via multiple drive circuits in the indicator light drive unit 2 that connect the multiple switches 1 and multiple indicator lights based on the combination of closed or open states of the multiple switches in the multiplex switch 1, the method further includes:
[0092] The first end of the first driving circuit 21 is connected to the first switch 11, and the second end is connected to the first indicator light 31. The first driving circuit 21 includes an NPN transistor.
[0093] The first end of the second driving circuit 22 is connected to the second switch 12, and the second end is connected to the second indicator light 32. The second driving circuit 22 includes an NPN transistor.
[0094] The first end of the third driving circuit 23 is connected to the first switch 11, and the second end is connected to the third indicator light 33. The third driving circuit 23 includes an NPN transistor.
[0095] The first terminal of the fourth driving circuit 24 is connected to the second switch 12. The fourth driving circuit 24 includes an NPN transistor, and the collector of the NPN transistor in the fourth driving circuit 24 is connected to the emitter of the NPN transistor in the third driving circuit 23.
[0096] The first end of the fifth driving circuit 25 is connected to the first switch 11, and the second end is connected to the fourth indicator light 34. The fifth driving circuit 25 includes a PNP transistor.
[0097] The first terminal of the sixth driving circuit 26 is connected to the second switch 12. The sixth driving circuit 26 includes a PNP transistor, and the collector of the PNP transistor in the sixth driving circuit 26 is connected to the emitter of the PNP transistor in the fifth driving circuit 25.
[0098] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the above-described device and its modules and units can be referred to the corresponding processes in the foregoing embodiments, and will not be repeated here.
[0099] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0100] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0101] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A driving system for an indicator light, characterized in that, include: A multiplexer (1) has one end connected to the I / O interface of the controller and is used to control the closing or opening of multiple switches inside it according to the control information of the controller. The indicator light driving unit (2) includes multiple driving circuits. The first end of each driving circuit is connected to the switch in the multiplexer (1), and the second end of each driving circuit is connected to multiple indicator lights. The indicator light driving unit (2) is used to drive multiple indicator lights to light up according to the combination of the closed or open states of multiple switches in the multiplexer (1). When the multiplexer (1) is a dual-way switch, it includes a first switch (11) and a second switch (12). The indicator light driving unit (2) includes 6 driving circuits and 4 indicator lights; The first driving circuit (21) of the indicator light driving unit (2) is configured to be turned on when the first switch (11) is closed and in a high-level state, and the second switch (12) is open and in a floating state, so as to light up the first indicator light (31). The second driving circuit (22) of the indicator light driving unit (2) is configured to be turned on when the first switch (11) is open and in a floating state, and the second switch (12) is closed and in a high-level state, so as to light up the second indicator light (32). The third driving circuit (23) and the fourth driving circuit (24) of the indicator light driving unit (2) are configured to be turned on when the first switch (11) is closed and in a high-level state, and the second switch (12) is closed and in a high-level state, so as to light up the third indicator light (33). The fifth driving circuit (25) and the sixth driving circuit (26) of the indicator light driving unit (2) are configured to be turned on when the first switch (11) is open and in a floating state, and the second switch (12) is open and in a floating state, so as to light up the fourth indicator light (34).
2. The indicator light driving system according to claim 1, characterized in that: When the number of switches in the multiplexer (1) is N, the number of indicator lights is at most 2. N indivual.
3. The indicator light driving system according to claim 1, characterized in that, Each drive circuit includes either an NPN transistor or a PNP transistor.
4. The indicator light driving system according to claim 1, characterized in that: The first end of the first driving circuit (21) is connected to the first switch (11), and the second end is connected to the first indicator light (31). The first driving circuit (21) includes an NPN transistor. The first end of the second driving circuit (22) is connected to the second switch (12), and the second end is connected to the second indicator light (32). The second driving circuit (22) includes an NPN transistor. The first end of the third driving circuit (23) is connected to the first switch (11), and the second end is connected to the third indicator light (33). The third driving circuit (23) includes an NPN transistor. The first end of the fourth driving circuit (24) is connected to the second switch (12). The fourth driving circuit (24) includes an NPN transistor. The collector of the NPN transistor in the fourth driving circuit (24) is connected to the emitter of the NPN transistor in the third driving circuit (23). The first end of the fifth driving circuit (25) is connected to the first switch (11), and the second end is connected to the fourth indicator light (34). The fifth driving circuit (25) includes a PNP transistor. The first end of the sixth driving circuit (26) is connected to the second switch (12). The sixth driving circuit (26) includes a PNP transistor. The collector of the PNP transistor in the sixth driving circuit (26) is connected to the emitter of the PNP transistor in the fifth driving circuit (25).
5. A method for driving an indicator light, characterized in that, Includes the following steps: Each switch in the multiplexer (1) is controlled to close or open. Based on the combination of the closed or open states of multiple switches in the multiple-way switch (1), multiple indicator lights are driven to light up through multiple driving circuits in the indicator light driving unit (2) used to connect the multiple-way switch (1) and multiple indicator lights; The step of driving multiple indicator lights to illuminate based on the combination of the closed or open states of multiple switches in the multiple-way switch (1) through multiple driving circuits in the indicator light driving unit (2) for connecting the multiple-way switch (1) and multiple indicator lights includes: When the multiplexer (1) is a dual-way switch, it includes a first switch (11) and a second switch (12). The indicator light driving unit (2) includes 6 driving circuits and 4 indicator lights; When the first switch (11) is closed and in a high-level state, and the second switch (12) is open and in a floating state, the first driving circuit (21) is turned on to light up the first indicator light (31). When the first switch (11) is open and in a floating state, and the second switch (12) is closed and in a high-level state, the second driving circuit (22) is turned on to light up the second indicator light (32). When the first switch (11) is closed and in a high-level state, and the second switch (12) is closed and in a high-level state, the third driving circuit (23) and the fourth driving circuit (24) are turned on to light up the third indicator light (33). When the first switch (11) is open and in a floating state, and the second switch (12) is open and in a floating state, the fifth drive circuit (25) and the sixth drive circuit (26) are turned on to light up the fourth indicator light (34).
6. The driving method for the indicator light according to claim 5, characterized in that, When the number of switches in the multiplexer (1) is N, the number of indicator lights is at most 2. N indivual.
7. The driving method for the indicator light according to claim 5, characterized in that, Each drive circuit includes either an NPN transistor or a PNP transistor.
8. The driving method for the indicator light according to claim 5, characterized in that, Before driving multiple indicator lights to illuminate via multiple driving circuits in the indicator light driving unit (2) that connect the multiple switches (1) and multiple indicator lights according to the combination of closed or open states of the multiple switches in the multiple switch (1), the following steps are also included: The first end of the first driving circuit (21) is connected to the first switch (11), and the second end is connected to the first indicator light (31). The first driving circuit (21) includes an NPN transistor. The first end of the second driving circuit (22) is connected to the second switch (12), and the second end is connected to the second indicator light (32). The second driving circuit (22) includes an NPN transistor. The first end of the third driving circuit (23) is connected to the first switch (11), and the second end is connected to the third indicator light (33). The third driving circuit (23) includes an NPN transistor. The first end of the fourth driving circuit (24) is connected to the second switch (12). The fourth driving circuit (24) includes an NPN transistor. The collector of the NPN transistor in the fourth driving circuit (24) is connected to the emitter of the NPN transistor in the third driving circuit (23). The first end of the fifth driving circuit (25) is connected to the first switch (11), and the second end is connected to the fourth indicator light (34). The fifth driving circuit (25) includes a PNP transistor. The first end of the sixth driving circuit (26) is connected to the second switch (12). The sixth driving circuit (26) includes a PNP transistor. The collector of the PNP transistor in the sixth driving circuit (26) is connected to the emitter of the PNP transistor in the fifth driving circuit (25).