Control device, lamp and vehicle

Abstract

The utility model provides a control device, a lamp and a vehicle, and relates to the technical field of electronic information, in particular to the technical field of vehicle control. According to the specific implementation scheme, the control device comprises a processor and a constant current circuit, the processor is used for receiving a control signal provided by the outside and outputting a switching signal according to the control signal, and the switching signal has a first level or a second level; the constant current circuit is electrically connected with the processor and is also electrically connected with the light emitting device; the constant current circuit is used for receiving a switching signal; wherein when the switching signal has a first level, the constant current circuit outputs a constant current to enable the light-emitting device to be in an on state, and when the switching signal has a second level, the constant current circuit enables the light-emitting device to be in an off state. The technical problem that the light-emitting device is easily ablated due to the fact that the vehicle body controller outputs the driving current to directly drive the light-emitting device can be solved.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic information technology, in particular to the field of vehicle control technology, and in particular to a control device, a lamp, and a vehicle. Background Art

[0002] Vehicle lighting plays an increasingly important role in vehicle safety protection. Specifically, the vehicle lighting system includes turn signals, high-mounted brake lights, low-mounted brake lights, position lights, rear fog lights, reverse lights, and parking lights. Utility Model Content

[0003] The present disclosure provides a control device, a lamp, and a vehicle.

[0004] According to one aspect of the present disclosure, a control device is provided for driving a light-emitting device, the control device comprising: a processor configured to receive an externally provided control signal and output a switching signal according to the control signal, the switching signal having a first level or a second level; a constant current circuit electrically connected to the processor and also electrically connected to the light-emitting device; the constant current circuit configured to receive the switching signal;

[0005] When the switch signal has a first level, the constant current circuit outputs a constant current to turn the light emitting device on; when the switch signal has a second level, the constant current circuit turns the light emitting device off.

[0006] According to another aspect of the present disclosure, a lamp is provided. The lamp includes the control device provided by some of the above embodiments, and the lamp also includes a light-emitting device, and the control device is electrically connected to the light-emitting device.

[0007] According to another aspect of the present disclosure, a vehicle is provided, comprising a vehicle body, the lamps provided in some of the above embodiments, and a body controller, wherein the lamps are mounted on the vehicle body, the body controller is electrically connected to a control device in the lamps, and the body controller is configured to output a control signal to the control device.

[0008] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are provided to facilitate a better understanding of the present invention and do not constitute a limitation of the present disclosure.

[0010] Figure 1 is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0011] Figure 2is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0012] Figure 3 is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0013] Figure 4 is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0014] Figure 5 is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0015] Figure 6 is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0016] Figure 7 is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0017] Figure 8 is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0018] Figure 9 is a structural schematic diagram of a control device according to an embodiment of the present disclosure;

[0019] Figure 10 is a structural schematic diagram of a lamp according to an embodiment of the present disclosure;

[0020] Figure 11 It is a schematic structural diagram of a vehicle according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present disclosure will be described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments.

[0022] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of such features. Throughout the present disclosure, unless otherwise specified, "plurality" means two or more.

[0023] In this disclosure, unless otherwise specified or limited, the term "connection" should be understood broadly. For example, "connection" can mean fixed connection, detachable connection, or integration; it can mean direct connection or indirect connection through an intermediary. In addition, the term "coupling" can refer to the manner in which electrical connection is achieved for signal transmission.

[0024] In the present disclosure, the control electrode of each transistor used is the gate of the transistor, the first electrode is one of the source and drain of the transistor, and the second electrode is the other of the source and drain of the transistor. Since the source and drain of the transistor can be symmetrical in structure, the source and drain can be structurally indistinguishable. In other words, the first electrode and the second electrode of the transistor in the embodiments of the present disclosure can be structurally indistinguishable. For example, in the case where the transistor is a P-type transistor, the first electrode of the transistor is the source and the second electrode is the drain; for example, in the case where the transistor is an N-type transistor, the first electrode of the transistor is the drain and the second electrode is the source.

[0025] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0026] Vehicle lighting plays an increasingly important role in vehicle safety. The vehicle lighting system can include turn signals, high-mounted brake lights, low-mounted brake lights, position lights, rear fog lights, reverse lights, parking lights, etc.

[0027] Vehicle lighting systems can be controlled by a body control module (BCM). However, existing vehicle lighting systems directly drive the lamps using the BCM. For example, when braking is active (when the BCM receives a braking command), the BCM outputs a driving current, illuminating the high-mounted brake lamp. When braking is released, the BCM stops outputting the driving current, and the high-mounted brake lamp turns off.

[0028] In the above solution, the driving current is directly provided to the high-mounted brake light through the body controller. When braking is effective, there will be an inrush current, which can easily cause the high-mounted brake light to burn out, causing the high-mounted brake light to fail, thereby reducing the reliability of the vehicle lighting system.

[0029] It should be noted that the above description only takes the high-mounted brake light as an example, and other light-emitting devices in the vehicle lighting system may also have related technical problems.

[0030] Based on this, the present disclosure provides a control device, a lamp and a vehicle to solve the technical problem that using a body controller to directly output a driving current to drive a light-emitting device can easily lead to ablation of the light-emitting device, causing the high-mounted brake light to fail, thereby reducing the reliability of the vehicle lighting system.

[0031] like Figure 1 As shown, a control device 10 provided in an embodiment of the present disclosure is shown. The control device 10 is used to drive a light-emitting device 700. For example, the light-emitting device 700 may be a high-mounted brake light of a vehicle. Of course, the present disclosure does not limit the type of light-emitting device 700; the light-emitting device 700 may also be one or more of a turn signal, a position light, a rear fog light, a reverse light, or a parking light.

[0032] The control device 10 may include a processor 100 and a constant current circuit 200 .

[0033] The processor 100 can be configured to receive a control signal from an external control device. For example, the processor 100 can be electrically connected to a vehicle body controller to receive the control signal from the vehicle body controller. After receiving the control signal from the vehicle body controller, the processor 100 can output a switch signal based on the control signal. The switch signal can have a first level or a second level.

[0034] The constant current circuit 200 can be electrically connected to the processor 100, and the constant current circuit 200 can also be electrically connected to the light-emitting device 700. The constant current circuit 200 can provide a constant driving current to the light-emitting device 700 to drive the light-emitting device 700. For example, the constant current circuit 200 can receive a switching signal sent by the processor 100 and drive the light-emitting device 700 under the control of the switching signal.

[0035] For example, when the switching signal has a first level, the constant current circuit 200 may output a constant driving current and transmit it to the light-emitting device 700, so that the light-emitting device 700 is in a lit state. When the switching signal has a second level, the constant current circuit 200 may stop outputting the driving current to the light-emitting device 700, so that the light-emitting device 700 is in an extinguished state.

[0036] In the control device 10 provided in the embodiments of the present disclosure, a control signal is received by the processor 100, and a switching signal is output according to the control signal. The constant current circuit 200 outputs a driving current according to the first level of the switching signal to illuminate the light-emitting device 700, or stops outputting the driving current according to the second level of the switching signal to extinguish the light-emitting device 700. Therefore, the vehicle body controller can drive the light-emitting device 700 by transmitting a control signal to the control device 10, without directly outputting a driving current to drive the light-emitting device 700. This avoids the technical problem of the vehicle body controller outputting a driving current to directly drive the light-emitting device 700, which may cause ablation of the light-emitting device 700 and cause the light-emitting device 700 to fail.

[0037] like Figure 2 As shown, the light-emitting device 700 may include multiple LEDs, which may be connected in series and / or in parallel. For example, in this embodiment, multiple LEDs are connected in series to form an LED cluster, which is then connected in parallel to another LED cluster formed by connecting multiple LEDs in series. Of course, the present disclosure does not limit the number of LEDs or the connection method between the multiple LEDs.

[0038] The anode of the light-emitting diode (LED) can be electrically connected to a power supply 800, and the cathode of the light-emitting diode (LED) can be electrically connected to a constant current circuit 200. The constant current circuit 200 can also be electrically connected to a first voltage terminal. For example, the power supply 800 can be a vehicle battery, which can provide a supply voltage. The first voltage terminal can be used to transmit a ground signal or other constant low voltage signal.

[0039] When the switch signal is at the first level, the constant current circuit 200 is turned on, so that the cathode of the light-emitting diode LED is electrically connected to the first voltage terminal. Therefore, when the constant current circuit 200 is turned on, there is a voltage difference between the two ends of the light-emitting diode LED, and the light-emitting diode LED can emit light under the action of the supply voltage, that is, it is in the lit state.

[0040] When the switch signal is at the second level, the constant current circuit 200 is turned off, so that the circuit between the light emitting device 700 and the first voltage terminal is disconnected. Therefore, there is no voltage difference between the two ends of the light emitting device 700, and the light emitting device 700 is in an off state.

[0041] In some embodiments of the present disclosure, Figure 2 As shown, the constant current circuit 200 may include a switch sub-circuit 210 and a current limiting sub-circuit 220 .

[0042] The switch subcircuit 210 can be used to control the on / off between the power supply 800 and the first voltage terminal. The first terminal 1 of the switch subcircuit 210 can be electrically connected to the light emitting device 700, and the second terminal 2 of the switch subcircuit 210 can be electrically connected to the processor 100.

[0043] The current limiting subcircuit 220 can be used to control the magnitude of the current between the control power supply 800 and the first voltage terminal. The first terminal 1 of the current limiting subcircuit 220 can be electrically connected to the second terminal 2 of the switch subcircuit 210, the second terminal 2 of the current limiting subcircuit 220 can be electrically connected to the third terminal 3 of the switch subcircuit 210, and the third terminal 3 of the current limiting subcircuit 220 can be electrically connected to the first voltage terminal.

[0044] like Figure 3 As shown, the switch sub-circuit 210 may include a first switch transistor T1 . A first electrode of the first switch transistor T1 may be electrically connected to the light emitting device 700 , and a control electrode of the first switch transistor T1 may be electrically connected to the processor 100 .

[0045] The current limiting sub-circuit 220 may include a second switching transistor T2 and a current limiting resistor R1. A first terminal of the second switching transistor T2 may be electrically connected to a control terminal of the first switching transistor T1, a second terminal of the second switching transistor T2 may be electrically connected to a first voltage terminal, and a control terminal of the second switching transistor T2 may be electrically connected to a second terminal of the first switching transistor T1. A first end of the current limiting resistor R1 may be electrically connected to a control terminal of the second switching transistor T2, and a second end of the current limiting resistor R1 may be electrically connected to the first voltage terminal.

[0046] Thus, when the first switch tube T1 is turned on, the cathode of the light-emitting device 700 is electrically connected to the first voltage terminal, and the light-emitting device 700 emits light under the action of the supply voltage. When the first switch tube T1 is turned off, the circuit between the cathode of the light-emitting device 700 and the first voltage terminal is disconnected, and the light-emitting device 700 is in an extinguished state.

[0047] At the same time, when the voltage at the second electrode of the first switch T1 is higher than the turn-on voltage of the second switch T2, the second switch T2 is turned on, electrically connecting the control electrode of the first switch T1 to the first voltage terminal. As a result, the voltage at the control electrode of the first switch T1 begins to decrease until the voltage at the control electrode of the first switch T1 is lower than the turn-on voltage of the first switch T1. At this point, the first switch T1 is turned off, and the voltage at the second electrode of the first switch T1 decreases, causing the second switch T2 to turn off. After the second switch T2 is turned off, the voltage at the control electrode of the first switch T1 increases, causing the first switch T1 to turn on again, and the voltage at the second electrode of the first switch T1 continues to increase. Thus, the second switch T2 can ensure that the voltage at the second electrode of the first switch T1 is always lower than the turn-on voltage of the second switch T2. Therefore, the current flowing through the first switch tube T1, that is, the driving current of the light-emitting device 700, is determined by the turn-on voltage of the second switch tube T2 and the resistance value of the current-limiting resistor R1. Therefore, when the turn-on voltage of the second switch tube T2 and the resistance value of the current-limiting resistor R1 remain unchanged, the driving current of the light-emitting device 700 remains constant.

[0048] In some embodiments of the present disclosure, the constant current circuit 200 may further include a protection resistor R2, a first end of the protection resistor R2 may be electrically connected to the processor 100, and a second end of the protection resistor R2 may be electrically connected to the control end of the first switch tube T1 and the first end of the second switch tube T2.

[0049] In this way, when the second switch tube T2 is turned on, the processor 100 can be prevented from being directly electrically connected to the first voltage terminal, that is, the processor 100 can be prevented from being directly grounded, thereby protecting the processor 100.

[0050] For example, the constant current circuit 200 in the embodiment of the present disclosure may also be a constant current driver chip.

[0051] In some embodiments of the present disclosure, Figure 4 As shown, the control device 10 may further include a protection circuit 300. The protection circuit 300 may be electrically connected to the light-emitting device 700, and the protection circuit 300 may also be electrically connected to the processor 100. The protection circuit 300 may be configured to receive an external power supply voltage and provide a voltage signal having a voltage value lower than a preset safety threshold to the light-emitting device 700 and the processor 100.

[0052] For example, Figure 5 As shown, the protection circuit 300 may include a transient voltage suppressor (TVS). A first terminal of the transient voltage suppressor (TVS) may be electrically connected to the power supply 800 to receive a supply voltage, a first terminal of the transient voltage suppressor (TVS) may also be electrically connected to the light-emitting device 700 and the processor 100, and a second terminal of the transient voltage suppressor (TVS) may be electrically connected to the first voltage terminal.

[0053] When the supply voltage provided by the power supply 800 is too large, such as when it reaches the avalanche breakdown voltage of the transient voltage suppressor TVS (preset safety threshold), the transient voltage suppressor TVS is turned on, so that the power supply 800 is connected to the first voltage terminal, thereby transmitting the supply voltage to the first voltage terminal.

[0054] In this way, by selecting a suitable transient voltage suppressor TVS, it is possible to prevent the supply voltage from being too high, thereby preventing the subsequent circuits such as the light emitting device 700 from being damaged.

[0055] Exemplarily, the transient voltage suppressor TVS may be a unidirectional transient voltage suppressor diode or a bidirectional transient voltage suppressor diode.

[0056] Exemplarily, a voltage stabilizing diode may also be used to implement the protection circuit 300 .

[0057] In some embodiments of the present disclosure, Figure 5 As shown, the protection circuit 300 may further include a protection capacitor C5 , a first end of the protection capacitor C5 is electrically connected to the first end of the transient suppressor, and a second end of the protection capacitor C5 may be electrically connected to the first voltage end.

[0058] In this way, when there are unwanted noises in the power supply voltage that are not needed by the subsequent circuit, they can be filtered out by selecting a protection capacitor C5 with a suitable capacitance.

[0059] In some embodiments of the present disclosure, Figure 6 As shown, the control device 10 may further include a first filtering circuit 400, which may be electrically connected to the processor 100. The first filtering circuit 400 may also be electrically connected to the vehicle body controller to receive a control signal sent by the vehicle body controller, filter the control signal, and output the filtered control signal to the processor 100.

[0060] For example, Figure 7 As shown, the first filtering circuit 400 may include a first filtering capacitor C1. A first terminal of the first filtering capacitor C1 may be used to receive a control signal, the first terminal of the first filtering capacitor C1 may also be electrically connected to the processor 100, and a second terminal of the first filtering capacitor C1 may be electrically connected to the first voltage terminal.

[0061] In this way, when the control signal contains unnecessary noises for the processor 100 , it can be filtered out by selecting a first filter capacitor C1 with a suitable capacitance.

[0062] For example, the first filter circuit 400 may further include a second filter capacitor C2, wherein a first end of the second filter capacitor C2 is electrically connected to a first end of the first filter capacitor C1, and a second end of the second filter capacitor C2 is electrically connected to the first voltage terminal. The capacitance of the second filter capacitor C2 may be smaller than that of the first filter capacitor C1.

[0063] In this way, the first filter capacitor C1 can be used to filter out the higher-frequency noise in the control signal, and the second filter capacitor C2 can be used to filter out the lower-frequency noise in the control signal.

[0064] In some embodiments of the present disclosure, Figure 8 As shown, the control device 10 may further include a second filtering circuit 500, which may be electrically connected to the processor 100. The second filtering circuit 500 may be used to receive a power supply voltage, filter the power supply voltage, and output the filtered power supply voltage to the processor 100.

[0065] For example, Figure 9 As shown, the second filter circuit 500 may include a third filter capacitor C3 and a fourth filter capacitor C4. The first end of the third filter capacitor C3 may be used to receive a supply voltage, the first end of the third filter capacitor C3 may also be electrically connected to the processor 100, and the second end of the third filter capacitor C3 may be electrically connected to the first voltage terminal. The first end of the fourth filter capacitor C4 may be electrically connected to the processor 100, and the second end of the fourth filter capacitor C4 may be electrically connected to the first voltage terminal.

[0066] The capacitance of the fourth filter capacitor C4 may be smaller than that of the third filter capacitor C3. The third filter capacitor C3 may be used to filter out high-frequency noise in the control signal, and the fourth filter capacitor C4 may be used to filter out low-frequency noise in the supply voltage.

[0067] In this way, when the power supply voltage contains unnecessary noises for the processor 100 , the noises can be filtered out by selecting appropriate third filter capacitor C3 and fourth filter capacitor C4 .

[0068] In some embodiments of the present disclosure, the processor 100 may be a single-chip microcomputer. The control signal sent by the vehicle body controller may be a pulse-width modulation (PWM) signal. The processor 100 outputs the switching signal according to the PWM signal.

[0069] In this way, compared with the related art in which the body controller directly outputs a driving current to drive the light-emitting device 700, which requires the body controller to additionally add a driving chip and a corresponding driving circuit, in the embodiment of the present disclosure, the body controller can control the processor 100 to drive the light-emitting device 700 by outputting a pulse width modulation signal, without the need to additionally add a driving chip and a corresponding driving circuit, thereby reducing the cost required for the body controller to drive the light-emitting device 700.

[0070] At the same time, the body controller and the processor 100 only need to be electrically connected through a signal line that can transmit pulse width modulation signals, instead of selecting a corresponding power wiring harness for electrical connection due to the need to transmit driving current as in the related art, further reducing the cost required for the body controller to drive the light-emitting device 700.

[0071] For example, the processor 100 can be controlled to output a corresponding switching signal based on the duty cycle of the pulse width modulation signal. For example, when the frequency of the pulse width modulation signal is 200 Hz and the duty cycle is 40%, the processor 100 outputs a switching signal with a first level, causing the constant current circuit 200 to drive the light-emitting device 700 to emit light. When the frequency of the pulse width modulation signal is 200 Hz and the duty cycle is 20%, the processor 100 outputs a switching signal with a second level, causing the constant current circuit 200 to drive the light-emitting device 700 to turn off.

[0072] Exemplarily, the processor 100 may also be other modules that can be selected by those skilled in the art and can output the above-mentioned switching signal according to the pulse width modulation signal, and the present disclosure does not limit this.

[0073] like Figure 10 As shown, some embodiments of the present disclosure further provide a lamp 20. The lamp 20 may include a light emitting device 700 and a control device 10. The control device 10 is used to drive the light emitting device 700. The control device 10 may include a processor 100 and a constant current circuit 200.

[0074] The processor 100 can be configured to receive a control signal from an external control device. For example, the processor 100 can be electrically connected to a vehicle body controller to receive the control signal from the vehicle body controller. After receiving the control signal from the vehicle body controller, the processor 100 can output a switch signal based on the control signal. The switch signal can have a first level or a second level.

[0075] The constant current circuit 200 may be electrically connected to the processor 100 and may also be electrically connected to the light emitting device 700. The constant current circuit 200 may receive a switching signal sent by the processor 100 and drive the light emitting device 700 under the control of the switching signal.

[0076] In this way, in the lamp 20 provided in the embodiment of the present disclosure, the body controller can send a control signal to the control device 10 to drive the light-emitting device 700, without directly outputting a driving current to drive the light-emitting device 700, thereby avoiding the technical problem that the body controller outputs a driving current to directly drive the light-emitting device 700, causing the light-emitting device 700 to be burned and causing the light-emitting device 700 to fail.

[0077] like Figure 11 As shown, some embodiments of the present disclosure further provide a vehicle 30. The vehicle 30 may include a lamp 20, a body control module (BCM) 600, and a power supply 800. The power supply 800 may provide a driving current for the lamp 20.

[0078] The lamp 20 may include a light emitting device 700 and a control device 10. The control device 10 is used to drive the light emitting device 700. The control device 10 may include a processor 100 and a constant current circuit 200.

[0079] The processor 100 may be configured to receive a control signal sent by the vehicle body controller 600. After receiving the control signal sent by the vehicle body controller 600, the processor 100 may output a switch signal according to the control signal. The switch signal may have a first level or a second level.

[0080] The constant current circuit 200 can be electrically connected to the processor 100, and the constant current circuit 200 can also be electrically connected to the light-emitting device 700. The constant current circuit 200 can provide a constant current to the light-emitting device 700 to drive the light-emitting device 700. For example, the constant current circuit 200 can receive a switching signal sent by the processor 100 and drive the light-emitting device 700 under the control of the switching signal.

[0081] For example, when the switching signal has a first level, the constant current circuit 200 may output a constant current and transmit it to the light-emitting device 700, so that the light-emitting device 700 is in a lit state. When the switching signal has a second level, the constant current circuit 200 may stop outputting the driving current to the light-emitting device 700, so that the light-emitting device 700 is in an extinguished state.

[0082] In the vehicle 30 provided in the embodiment of the present disclosure, the body controller 600 can drive the light-emitting device 700 by transmitting a control signal to the control device 10, without directly outputting a driving current to drive the light-emitting device 700, thereby avoiding the technical problem that the body controller 600 outputs a driving current to directly drive the light-emitting device 700, causing the light-emitting device 700 to be ablated and causing the light-emitting device 700 to fail.

[0083] In some embodiments of the present disclosure, when the light-emitting device 700 is a brake light, the body controller 600 sends a control signal after receiving a braking command, causing the processor 100 to generate a switching signal, and making the switching signal a first level, thereby controlling the constant current circuit 200 to output a constant current to make the light-emitting device 700 in a lit state.

[0084] In other embodiments of the present disclosure, the light-emitting device 700 may also be one or more of a turn signal, a position light, a rear fog light, a reversing light, and a parking light. When these lights need to be turned on, the body controller 600 may output corresponding control signals according to corresponding instructions, and the processor 100 may output corresponding switch signals according to corresponding control signals.

[0085] In some embodiments of the present disclosure, the control signal may be a pulse width modulation signal, and the control device 10 and the vehicle body controller 600 may be electrically connected via a signal line for transmitting the pulse width modulation signal.

[0086] For example, the vehicle body controller 600 is provided with a port for outputting a pulse-width modulated signal. One end of the signal line is connected to the port to achieve connection with the vehicle body controller, and the other end of the signal line is electrically connected to the control device 10 to output the pulse-width modulated signal to the control device 10. Of course, the present disclosure is not limited to the vehicle body controller 600, and those skilled in the art may also select other devices capable of outputting the above-mentioned control signals as needed.

[0087] In this way, compared with the situation where the body controller 600 directly outputs the driving current to drive the light-emitting device 700 (which requires a power wiring harness with a larger wire diameter), in the embodiment of the present disclosure, the body controller 600 can control the light-emitting device 700 through a pulse width modulation signal, and the requirement for the wire diameter of the signal line is relatively low. Therefore, in the embodiment of the present disclosure, the cost of the wire required for the body controller 600 to drive the light-emitting device is relatively low.

[0088] In one embodiment of the present disclosure, the vehicle 30 may further include a vehicle body 31. A lampshade (not shown) is provided on the vehicle body 31, and the light emitting device 700 and the control device 10 may be installed in the lampshade.

[0089] The above specific embodiments do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure shall be included within the scope of protection of this disclosure.

Claims

1. A control device for driving a light emitting device, the control device comprising: A processor, the processor is used to receive a control signal provided by an external device, and output a switch signal according to the control signal, wherein the switch signal has a first level or a second level; A constant current circuit, electrically connected to the processor, and also electrically connected to the light emitting device; the constant current circuit is used to receive the switch signal; Wherein, when the switch signal has a first level, the constant current circuit outputs a constant current to make the light-emitting device in a lighting state; when the switch signal has a second level, the constant current circuit makes the light-emitting device in an extinguishing state.

2. The control device according to claim 1, wherein: The constant current circuit comprises: a switch subcircuit, wherein a first end of the switch subcircuit is electrically connected to the light emitting device, and a second end of the switch subcircuit is electrically connected to the processor; A current limiting subcircuit, wherein a first end of the current limiting subcircuit is electrically connected to a second end of the switch subcircuit, a second end of the current limiting subcircuit is electrically connected to a third end of the switch subcircuit, and a third end of the current limiting subcircuit is electrically connected to a first voltage end.

3. The control device according to claim 2, wherein: The switch subcircuit comprises a first switch tube, a first electrode of the first switch tube is electrically connected to the light emitting device, and a control electrode of the first switch tube is electrically connected to the processor; and / or, The current limiting sub-circuit includes a second switch tube and a current limiting resistor, wherein the first electrode of the second switch tube is electrically connected to the control electrode of the first switch tube, the second electrode of the second switch tube is electrically connected to the first voltage end, and the control electrode of the second switch tube is electrically connected to the second electrode of the first switch tube; the first end of the current limiting resistor is electrically connected to the control end of the second switch tube, and the second end of the current limiting resistor is electrically connected to the first voltage end.

4. The control device according to any one of claims 1 to 3, wherein: The control device further comprises a protection circuit, wherein the protection circuit is electrically connected to the light emitting device, and the protection circuit is also electrically connected to the processor; The protection circuit is used to receive an external power supply voltage and provide a voltage signal with a voltage value lower than a preset safety threshold to the light emitting device and the processor.

5. The control device according to claim 4, wherein: The protection circuit includes a transient voltage suppressor, a first end of the transient voltage suppressor is used to receive the supply voltage, the first end of the transient voltage suppressor is electrically connected to the light-emitting device, the first end of the transient voltage suppressor is also electrically connected to the processor, and the second end of the transient voltage suppressor is electrically connected to the first voltage end.

6. The control device according to any one of claims 1 to 3, wherein: The control device also includes a first filter circuit, which is electrically connected to the processor. The first filter circuit is used to receive the control signal, filter the control signal, and output the filtered control signal to the processor.

7. The control device according to claim 6, wherein: The first filtering circuit comprises: A first filter capacitor, wherein the first end of the first filter capacitor is used to receive the control signal, the first end of the first filter capacitor is also electrically connected to the processor, and the second end of the first filter capacitor is electrically connected to the first voltage end.

8. The control device according to claim 7, wherein: The first filter circuit also includes: a second filter capacitor, a first end of the second filter capacitor is electrically connected to the first end of the first filter capacitor, and a second end of the second filter capacitor is connected to the first voltage end; the capacitance of the second filter capacitor is smaller than the capacitance of the first filter capacitor.

9. The control device according to any one of claims 1 to 3, wherein: The control device also includes a second filter circuit, which is electrically connected to the processor, and is used to receive a power supply voltage, filter the power supply voltage, and output the filtered power supply voltage to the processor.

10. The control device according to claim 9, wherein: The second filtering circuit includes a third filtering capacitor, a first end of the third filtering capacitor is used to receive the supply voltage, the first end of the third filtering capacitor is also electrically connected to the processor, and the second end of the third filtering capacitor is electrically connected to the first voltage end.

11. The control device according to claim 10, wherein: The second filtering circuit also includes a fourth filtering capacitor, a first end of the fourth filtering capacitor is electrically connected to the processor, and a second end of the fourth filtering capacitor is electrically connected to the first voltage end; the capacitance of the fourth filtering capacitor is smaller than the capacitance of the third filtering capacitor.

12. A lamp, comprising the control device according to any one of claims 1 to 11 and a light-emitting device, wherein the control device is electrically connected to the light-emitting device.

13. A vehicle comprising: Vehicle body; The lamp as claimed in claim 12, mounted on the vehicle body; The vehicle body controller is connected to the control device in the lamp and is used to output a control signal to the control device.

14. The vehicle according to claim 13, wherein: The vehicle further includes a signal line, wherein the signal line is used to connect the vehicle body controller and the control device, and the signal line is a pulse width modulation signal line.

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