Lamp control device, lamp system, vehicle, and lamp control method
By introducing a first control module, a second control module, and a third control module into the lighting system, and utilizing current value detection and fault diagnosis, efficient collaborative work among the lighting fixtures is achieved, solving the problem of poor cooperation among multiple lighting fixtures and improving the cooperation and response speed of the lighting system.
Patent Information
- Application Number
- CN202511110088.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-07
- Publication Date
- 2025-11-11
AI Technical Summary
In existing technologies, the coordination of multiple lights is poor, especially when the position lights in the vehicle coordinate with the front position lights on both sides. Coordination is required through the vehicle body controller, which leads to coordination delays and complex control links.
The system employs a first control module, a second control module, and a third control module, each connected to a lamp. The lamps work together by using preset voltage and working indication signals. The collaboration between the control modules, which utilize current value detection and fault diagnosis, simplifies the control logic.
It improves the collaboration and response speed of multiple lights, simplifies the control loop, reduces dependence on the body controller, and enhances the flexibility and synchronization of the lighting system.
Smart Images
Figure CN120935897A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of intelligent control technology, and more specifically, to a control device for a lamp, a lamp system, a vehicle, and a control method for a lamp. Background Technology
[0002] In some situations, multiple lights need to work together. For example, the center position light of a vehicle works in conjunction with the front position lights on both sides because it is involved in light distribution. In this case, when the front position lights on both sides are on, the center position light also needs to be on, and when any of the front position lights fails and goes out, the center position light also needs to go out.
[0003] In related technologies, the center position light is connected to the vehicle's body controller, which in turn connects to the front position lights via a light controller, thereby enabling the center position light and the two side front position lights to work together.
[0004] However, at this time, because the front position light controller needs to go through the body controller to enable the front position lights on both sides and the center position light to work together, the coordination of multiple lights is poor. Summary of the Invention
[0005] This application provides a control device for lighting fixtures, a lighting system, a vehicle, and a control method for lighting fixtures, which can improve the cooperation of multiple lighting fixtures working together.
[0006] In a first aspect, embodiments of this application provide a control device for a lamp, comprising: a first control module, configured to be connected to a first lamp, for driving the first lamp to operate when a preset voltage is applied and a working indication signal is received; a second control module, connected to the first control module, configured to be connected to the second lamp, for applying a preset voltage to the first control module when driving the second lamp to operate, and for stopping applying the preset voltage to the first control module when the second lamp stops operating; and a third control module, connected to the first control module, configured to be connected to a third lamp, for sending a working indication signal to the first control module when driving the third lamp to operate, and for stopping sending the working indication signal to the first control module when the third lamp stops operating.
[0007] In this embodiment, when the first, second, and third lamps need to work together, the second control module drives the second lamp to operate and applies a preset voltage to the first control module; the third control module drives the third lamp to operate and provides a working indication signal to the first control module. Thus, the first control module receives the power and the working indication signal, and can then drive the first lamp to operate, thereby enabling the first, second, and third lamps to work collaboratively. When the second lamp stops operating, the second control module stops applying the preset voltage to the first control module, thus stopping the first lamp connected to the first control module. When the third lamp stops operating, the third control module stops sending the working indication signal to the first control module, thus stopping the first lamp connected to the first control module. In other words, when at least one of the second or third lamps stops operating, the first lamp also stops operating. Furthermore, since the first lamp is operated by the first control module controlled by the second and third control modules, the coordination of the first, second, and third lamps during collaborative operation is improved.
[0008] In one possible implementation, the second control module includes: at least one second controller, the second controller including a first output terminal, a second drive terminal and a first control unit, the first output terminal being connected to the first control module, the second drive terminal being used to connect to the second lamp, and the first control unit being used to control the second drive terminal to drive the second lamp to work, and when the second drive terminal drives the second lamp to work, controlling the first output terminal to apply a preset voltage to the first control module and detecting the current value of the second drive terminal, if the current value of the second drive terminal is less than a first preset threshold, then controlling the first output terminal to stop applying the preset voltage to the first control module.
[0009] In this embodiment, the second controller includes a first output terminal, a second drive terminal, and a first control unit. The first output terminal is connected to the first control module, the second drive terminal is used to connect to the second lamp, and the first control unit is used to control the second drive terminal to drive the second lamp. When the second drive terminal drives the second lamp, the first control unit controls the first output terminal to apply a preset voltage to the first control module and detects the current value of the second drive terminal. If the current value of the second drive terminal is less than a first preset threshold, it is determined that the second lamp has stopped working due to a fault, and the first output terminal is controlled to stop applying the preset voltage to the first control module. In this way, the second drive terminal can drive the second lamp. During operation, the system promptly controls the first output terminal to apply a preset voltage to the first control module, enabling the first control module to control the first lamp to operate. It also detects the current value at the second drive terminal. If the current value at the second drive terminal is less than a first preset threshold, it determines that the second lamp has stopped operating due to a fault. This allows the system to control the first output terminal to stop applying the preset voltage to the first control module, thus stopping the first lamp. Therefore, the first lamp can operate in tandem with the second lamp, and it can also stop operating when the second lamp stops due to a fault, thereby improving the coordination between the lamps.
[0010] In one possible implementation, the first control unit is further configured to detect the current value of the first output terminal when the first output terminal applies a preset voltage to the first control module, and if the current value of the first output terminal is less than a second preset threshold, control the second driving terminal to stop driving the second lamp.
[0011] In this embodiment, the first control unit is also used to detect the current value of the first output terminal when the first output terminal applies a preset voltage to the first control module. If the current value of the first output terminal is less than a second preset threshold, the second driving terminal is controlled to stop driving the second lamp. In this way, when the first lamp or the third lamp fails, the second driving terminal can be controlled to stop driving the second lamp, thereby causing the second lamp to stop working. This can further improve the cooperation between lamps.
[0012] In one possible implementation, the third control module includes: at least one third controller, the third controller including a second output terminal, a third drive terminal, and a second control unit, the second output terminal being connected to the first control module, the third drive terminal being used to connect to the third lamp, and the second control unit being used to control the third drive terminal to drive the third lamp to work, and when the third drive terminal drives the third lamp to work, controlling the second output terminal to send a work indication signal to the first control module and to detect the current value of the third drive terminal, if the current value of the third drive terminal is less than a third preset threshold, then controlling the second output terminal to stop sending the work indication signal to the first control module.
[0013] In this embodiment, the third controller includes a second output terminal, a third drive terminal, and a second control unit. The second output terminal is connected to the first control module, the third drive terminal is used to connect to the third lamp, and the second control unit is used to control the third drive terminal to drive the third lamp. When the third drive terminal drives the third lamp, the second control unit controls the second output terminal to send a working indication signal to the first control module and detects the current value of the third drive terminal. If the current value of the third drive terminal is less than a third preset threshold, it is determined that the third lamp has stopped working due to a fault, and the second output terminal is controlled to stop sending the working indication signal to the first control module. In this way, the third drive terminal can drive the third lamp. During operation, the second output terminal promptly sends a work indication signal to the first control module, enabling the first control module to control the first lamp to operate and detect the current value of the third drive terminal. If the current value of the third drive terminal is less than a third preset threshold, it is determined that the third lamp has stopped working due to a fault. This allows the second output terminal to stop sending work indication signals to the first control module, thereby causing the first lamp to stop working. Thus, the first lamp can operate in sync with the third lamp, and when the third lamp stops working due to a fault, the first lamp can also stop working, thereby improving the coordination between the lamps.
[0014] In one possible implementation, the second control unit is further configured to detect the current value of the second output terminal when the control second output terminal sends a working indication signal to the first control module, and if the current value of the second output terminal is less than a fourth preset threshold, control the third driving terminal to stop driving the third lamp to work.
[0015] In this embodiment, the second control unit is also used to detect the current value of the second output terminal when the control second output terminal sends a working indication signal to the first control module. If the current value of the second output terminal is less than a fourth preset threshold, the control third drive terminal is controlled to stop driving the third lamp. In this way, when the first lamp or the second lamp fails, the control third drive terminal can be controlled to stop driving the third lamp, thereby causing the third lamp to stop working, which can further improve the cooperation between lamps.
[0016] In one possible implementation, the operation indication signal includes a pulse width modulation signal, which is used to control the brightness of the first lamp connected to the first control module.
[0017] In this embodiment, the brightness of the first lamp connected to the first control module is controlled by a pulse width modulation signal, which can dynamically adjust the brightness of the first lamp and improve the convenience of adjusting the brightness of the first lamp.
[0018] In one possible implementation, the device further includes: a fourth control module, connected to the second control module and the third control module respectively, the fourth control module being used to send lamp-on signals to the second control module and the third control module respectively in response to the lamp-on operation of the second lamp and the third lamp, so that the second control module drives the second lamp to work and applies a preset voltage to the first control module in response to the lamp-on signal, and causes the third control module to drive the third lamp to work and send a work indication signal to the first control module in response to the lamp-on signal.
[0019] In this embodiment, a fourth control module is provided in the control device. The fourth control module is connected to the second control module and the third control module respectively. The fourth control module is used to send lamp-on signals to the second control module and the third control module respectively in response to the lamp-on operation. This causes the second control module to drive the second lamp to work and apply a preset voltage to the first control module in response to the lamp-on signal. It also causes the third control module to drive the third lamp to work and send a work indication signal to the first control module in response to the lamp-on signal. In this way, the lamp-on signal can be sent uniformly through the fourth control module, which is conducive to the unified management of lamp control and the cooperation between lamps.
[0020] Secondly, embodiments of this application provide a lighting system, including a first luminaire, a second luminaire, a third luminaire, and the device as described in the first aspect.
[0021] Thirdly, embodiments of this application provide a vehicle including the lighting system as described in the second aspect.
[0022] Fourthly, embodiments of this application provide a method for controlling a lamp, applied to a lamp control device. The device includes a first control module, a second control module, and a third control module. The first control module is connected to a first lamp, the second control module is connected to a second lamp, and the third control module is connected to a third lamp. The method includes: the second control module receiving a lamp-on signal and, in response to the lamp-on signal, driving the second lamp to work, and applying a preset voltage to the first control module while driving the second lamp to work; the third control module receiving a lamp-on signal and, in response to the lamp-on signal, driving the third lamp to work, and sending a work indication signal to the first control module while driving the third lamp to work; the first control module driving the first lamp to work when the preset voltage is applied and when the work indication signal is received; the second control module stopping applying the preset voltage to the first control module when the second lamp stops working, and / or the third control module stopping sending the work indication signal to the first control module when the third lamp stops working, so that the first control module stops driving the first lamp to work.
[0023] In one possible implementation, the second control module includes at least one second controller. The second controller includes a first output terminal, a second drive terminal, and a first control unit. The first output terminal is connected to the first control module, and the second drive terminal is connected to the second lamp. The second control module drives the second lamp to work and applies a preset voltage to the first control module when driving the second lamp to work. This includes: the first control unit controls the second drive terminal to drive the second lamp to work, and when the second drive terminal drives the second lamp to work, it controls the first output terminal to apply the preset voltage to the first control module. When the second lamp stops working, the second control module stops applying the preset voltage to the first control module. This includes: when the second drive terminal drives the second lamp to work, the first control unit detects the current value of the second drive terminal; if the current value of the second drive terminal is less than a first preset threshold, it determines that the second lamp has stopped working due to a fault, and controls the first output terminal to stop applying the preset voltage to the first control module.
[0024] In one possible implementation, the method further includes: when the first control unit controls the first output terminal to apply a preset voltage to the first control module, it detects the current value of the first output terminal; if the current value of the first output terminal is less than a second preset threshold, it controls the second driving terminal to stop driving the second lamp.
[0025] In one possible implementation, the third control module includes at least one third controller, which includes a second output terminal, a third drive terminal, and a second control unit. The second output terminal is connected to the first control module, and the third drive terminal is connected to the third lamp. The third control module drives the third lamp to work and sends a work indication signal to the first control module when driving the third lamp to work. This includes: the second control unit controlling the third drive terminal to drive the third lamp to work, and controlling the second output terminal to send a work indication signal to the first control module when the third drive terminal drives the third lamp to work. When the third lamp stops working, the third control module stops sending work indication signals to the first control module. This includes: when the third drive terminal drives the third lamp to work, the second control unit detects the current value of the third drive terminal. If the current value of the third drive terminal is less than a third preset threshold, it determines that the third lamp has stopped working due to a fault and controls the second output terminal to stop sending work indication signals to the first control module.
[0026] In one possible implementation, the method further includes: when the second control unit sends a working instruction signal from the second output terminal to the first control module, it detects the current value of the second output terminal; if the current value of the second output terminal is less than a fourth preset threshold, it controls the third driving terminal to stop driving the third lamp. Attached Figure Description
[0027] Figure 1 A schematic diagram of a lighting system provided for related technologies.
[0028] Figure 2 This is a schematic diagram of the structure of a control device for a lamp provided in an embodiment of this application.
[0029] Figure 3 This is a schematic diagram of the input and output of a first controller according to an embodiment of this application.
[0030] Figure 4 This is a schematic diagram of the structure of a first controller provided in an embodiment of this application.
[0031] Figure 5 This is a schematic diagram of the structure of a second controller provided in an embodiment of this application.
[0032] Figure 6 This is a schematic diagram of the structure of a third controller provided in an embodiment of this application.
[0033] Figure 7 This is a schematic diagram of the structure of a control device for a lamp provided in another embodiment of this application.
[0034] Figure 8 This is a schematic diagram of a lighting system provided in an embodiment of this application.
[0035] Figure 9 This is a flowchart illustrating a method for controlling a lamp as provided in an embodiment of this application. Detailed Implementation
[0036] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0037] In some situations, multiple lights need to work together. For example, the center position light of a vehicle works in conjunction with the front position lights on both sides (such as the left and right position lights) because it is involved in light distribution. In this case, when the front position lights on both sides are on, the center position light also needs to be on, and when any of the front position lights fails and goes out, the center position light also needs to go out.
[0038] In related technologies, the center position light is connected to the vehicle's body control controller, which in turn connects to the front position lights via a lamp controller, thereby enabling the center position light and the two side front position lights to work together. However, since the lamp controller for the front position lights needs to go through the body control controller to enable the two side front position lights to work together with the center position light, the coordination of multiple lights working together is poor.
[0039] Please see Figure 1 , Figure 1A schematic diagram of a lighting system provided for related technologies. For example... Figure 1 The system includes a body controller 110, a left light controller 120, a right light controller 130, a center position light 140, a left position light 150, and a right position light 160. The body controller 110 is connected to the center position light 140, the left light controller 120 is connected to the left position light 150, and the right light controller 130 is connected to the right position light 160. In this embodiment, the left position light 150, center position light 140, and right position light 160 can form a light strip that runs through the grille.
[0040] For example, when the left light controller 120 controls the left position light 150 to illuminate and the right light controller 130 controls the right position light 160 to illuminate, the left light controller 120 and the right light controller 130 need to communicate with the body controller 110 to illuminate the center position light 140. When the left position light 150 or the right position light 160 malfunctions and goes out, the left light controller 120 or the right light controller 130 needs to notify the body controller 110 to extinguish the center position light 140; or when the center position light 140 malfunctions and goes out, the body controller 110 needs to notify the left light controller 120 and the right light controller 130, thereby enabling the left light controller 120 to extinguish the left position light 150 and the right light controller 130 to extinguish the right position light 160.
[0041] Because the body control 110 is required for cooperation, the cooperation between the left position light 150, the middle position light 140 and the right position light 160 is poor, for example, the cooperation is delayed.
[0042] Taking the automotive industry as an example, with its gradual development, the intelligence and styling design of cars have improved, and consumers' aesthetic demands have also increased. In recent years, more and more exterior lights have been added, increasing the luminous area of the car's exterior. Signage lights increase the visibility of car brands, allowing the car company's logo to move on the road and be seen by more people, while also enhancing the car's aesthetics. Grille lights, when new energy vehicles reduce the area of the grille, leaving this area appearing empty, can be filled with light to enhance the car's styling and give it a personality. Ambient lighting can pulsate with music, providing passengers with a more comfortable experience. The decoration of exterior car lights can satisfy consumers' aesthetic needs, increasing their positive feelings towards the car and ultimately improving their mood.
[0043] Currently, the control of automotive exterior nameplate lights or grille lights is mainly achieved by directly driving and lighting them through the body controller 110, and brightness adjustment and various changes cannot be realized. When it is necessary to light the exterior nameplate lights or grille lights, the high-side drive of the body controller 110 outputs a high level. At this time, the exterior signal lights are powered on and lit. However, if the left position light 150 or the right position light 160 does not meet the regulatory light distribution requirements, it is necessary to combine the grille lights or nameplate lights to participate in the light distribution together. When one side's position light fails, the grille lights or nameplate lights on that side must be turned off simultaneously to meet the regulatory requirements. To meet this function, communication is required between the grille lights or nameplate lights, the two front combination lights, and the body controller 110 to perform fault feedback and execute signals to achieve overall linkage. In the current design, to meet this requirement, the overall link connection is relatively complex, and the design of the grille lights or nameplate lights is also very complicated.
[0044] In addition, the signal transmission sequence among the center position light 140, the front combination lights (left position light 150 and right position light 160), and the body controller 110 is that when the center position light 140 fails, the body controller 110, and the front combination lights are turned off; or when the front combination lights fail, the body controller 110, and the center position light 140 is turned off. The link is too long, and the synchronization between different lights must pass through the body controller 110.
[0045] In view of this, the embodiments of the present application provide a control device for lamps, a lamp system, a vehicle, and a control method for lamps, which can improve the cooperation of multiple lamps working together.
[0046] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of a control device for lamps provided by an embodiment of the present application. As Figure 2 shown, the device may include a first control module 210, a second control module 220, and a third control module 230. Among them: The first control module 210 is used to connect to the first lamp to drive the first lamp to work when a preset voltage is applied and a work instruction signal is received; the second control module 220, which is connected to the first control module 210, is used to connect to the second lamp to apply a preset voltage to the first control module 210 when driving the second lamp to work, and stop applying the preset voltage to the first control module 210 when the second lamp stops working; the third control module 230, which is connected to the first control module 210, is used to connect to the third lamp to send a work instruction signal to the first control module 210 when driving the third lamp to work, and stop sending the work instruction signal to the first control module 210 when the third lamp stops working.
[0047] The working indication signal is used to instruct the first controller to control the first lamp connected to it to work. In this embodiment, when the lamp is working, it can be in an illuminated state, and when the lamp stops working, it can be in an off state. The second lamp stopping working can be due to the second control module 220 controlling the second lamp to stop working, that is, the second control module 220 not controlling the second lamp to work; or it can be due to a malfunction of the second lamp, which is not limited here. Similarly, the third lamp stopping working can be due to the third control module 230 controlling the third lamp to stop working, that is, the third control module 230 not controlling the third lamp to work; or it can be due to a malfunction of the third lamp, which is not limited here. Optionally, the second or third lamp in this embodiment can include, but is not limited to, high and low beam headlights, daytime running lights, position lights, brake lights, and turn signals.
[0048] Optionally, in this embodiment, the second control module 220 and the third control module 230 may receive the light-on signal simultaneously or sequentially, thereby causing the second control module 220 to drive the second lamp to work in response to the light-on signal and causing the third control module 230 to drive the third lamp to work in response to the light-on signal. Alternatively, the second control module 220 and the third control module 230 may control the second lamp to work and control the third lamp to work according to a pre-set program, without limitation. Optionally, the first lamp may be, for example, a center position lamp, the second lamp may be, for example, a left position lamp, and the third lamp may be, for example, a right position lamp.
[0049] It should be noted that the second light fixture stopping operation can be achieved by the second control module 220 controlling it to stop working; that is, the second control module 220 does not control the second light fixture to operate. For example, the second control module 220 controls the second light fixture to stop working after receiving a light-off signal, or it controls the second light fixture to stop working according to a pre-set program. Optionally, this pre-set program could be that the second light fixture stops working after being on for a few seconds. Alternatively, the second light fixture could also stop working due to a malfunction.
[0050] It should be noted that the third light fixture stopping operation can be achieved by the third control module 230 controlling it to stop working; that is, the third control module 230 does not control the third light fixture to operate. For example, the third control module 230 controls the third light fixture to stop working after receiving a light-off signal, or it controls the third light fixture to stop working according to a pre-set program. Optionally, this pre-set program could be that the third light fixture stops working after being on for a few seconds. Alternatively, the third light fixture could also stop working due to a malfunction.
[0051] In one possible implementation, the first control module 210 includes: At least one first controller, the first controller includes a first input terminal, a second input terminal and a first drive terminal, the first input terminal is connected to a second control module 220, the second input terminal is connected to a third control module 230, and the first drive terminal is used to connect to a first lamp to drive the first lamp to work when a preset voltage is applied to the first input terminal and the second input terminal receives a work indication signal sent from the third control module 230.
[0052] Please see Figure 3 , Figure 3 This is a schematic diagram of the input and output of a first controller according to an embodiment of this application. Figure 3 As shown, the input of the first controller is a 12-volt (V) voltage and a 12-V pulse width modulation (PWM) signal, and the output is a first drive signal to drive the first lamp to work.
[0053] In this embodiment, the 12V voltage can be a preset applied voltage, such as a 12V direct current (DC) voltage. The 12V PWM signal can specifically refer to a PWM signal with a voltage amplitude of 12V, and the PWM signal can be a type of operation indication signal. In this embodiment, the PWM signal is used to adjust the brightness of the first lamp connected to the first controller. Optionally, the brightness of the first lamp can be adjusted by adjusting the duty cycle of the PWM signal. In this embodiment, the third control module can control the brightness of the first lamp through the first controller via the PWM signal, thereby making the brightness of the first lamp consistent with the brightness of the third lamp. The larger the duty cycle of the PWM signal, the higher the brightness of the first lamp. The input terminal of the first controller can be an AND logic, that is, when a 12V voltage is applied to the first input terminal of the first controller and a 12V PWM signal is received at the second input terminal, the first controller drives the first lamp to work. Optionally, the brightness of the second lamp controlled by the second controller is consistent with the brightness of the third lamp controlled by the third controller. Optionally, the brightness can be preset or the brightness indicated by the light-on signal, which is not limited here.
[0054] In this embodiment, the first controller includes a first input terminal, a second input terminal, and a first drive terminal. The first input terminal is connected to a second control module, the second input terminal is connected to a third control module, and the first drive terminal is used to connect to the first lamp. When a preset voltage is applied to the first input terminal and the second input terminal receives a working indication signal sent from the third control module, the first drive terminal drives the first lamp to work. In this way, when the first controller can be energized and receives a working indication signal, it immediately drives the first lamp to work through the first drive terminal, and when no voltage is applied or no working indication signal is received, it immediately controls the first lamp to stop working through the first drive terminal, thereby improving the efficiency of the coordinated control of the first lamp.
[0055] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a first controller provided in an embodiment of this application. Figure 4 As shown, the first controller may include a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, a third diode D3, and a channel metal-oxide-semiconductor field-effect transistor (MOSFET). The transistor 2111 consists of a MOS transistor and a triode 2112. The positive terminal of the first diode D1 serves as the first input terminal. The negative terminal of the first diode D1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to the drain of the MOS transistor 2111. The source of the MOS transistor 2111 is grounded and connected to the base of the triode 2112. The gate of the MOS transistor 2111 is connected to the negative terminal of the third diode D3. The positive terminal of the third diode D3 is grounded and connected to the emitter-collector junction of the triode 2112. The collector of the triode 2112 serves as part of the first driving terminal and is connected to one end of the first lamp. The negative terminal of the first diode D1 serves as the other part of the first driving terminal and is connected to the other end of the first lamp. The positive terminal of the second diode D2 serves as the second input terminal. The negative terminal of the second diode D2 is connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to the gate of the MOS transistor 2111.
[0056] Optionally, the MOSFET 2111 in this embodiment can be an N-type MOSFET 2111 or a P-type MOSFET 2111. The transistor 2112 can be an N-type transistor 2112 or a P-type transistor 2112. Both the MOSFET 2111 and the transistor 2112 can be understood as control transistors. The lamp in this embodiment may include a light-emitting diode (LED).
[0057] The following explanation uses an NMOS transistor 2111 and an LED as the first lamp.
[0058] In this embodiment, when the 12V PWM input is high, the NMOS is turned on, and current flows through the 12V voltage - D1 - R2 - NMOS current direct current-driven constant current circuit, driving the base of transistor 2112. Alternatively, current flows through the 12V voltage - D1 to the LED. Transistor 2112 operates in the amplification region, amplifying the current to drive the LED, thus lighting it. When the 12V PWM input is low, the NMOS is turned off, and current can only flow into the LED through the 12V voltage - D1. However, current cannot flow from the base of transistor 2112 through the drain and source of the NMOS, therefore transistor 2112 cannot drive the LED, and the LED cannot light up.
[0059] In one possible implementation, the second control module includes: At least one second controller, the second controller including a first output terminal, a second drive terminal and a first control unit, the first output terminal being connected to a first control module, the second drive terminal being used to connect to a second lamp, the first control unit being used to control the second drive terminal to drive the second lamp to work, and when the second drive terminal drives the second lamp to work, controlling the first output terminal to apply a preset voltage to the first control module and detecting the current value of the second drive terminal, if the current value of the second drive terminal is less than a first preset threshold, then determining that the second lamp has stopped working due to a fault, and controlling the first output terminal to stop applying the preset voltage to the first control module.
[0060] In another possible implementation, the first control unit is also used to detect the current value of the first output terminal when the first output terminal applies a preset voltage to the first control module. If the current value of the first output terminal is less than a second preset threshold, the second drive terminal is controlled to stop driving the second lamp.
[0061] In this embodiment, if the current value at the first output terminal is less than the second preset threshold, it indicates that either the first lamp or the third lamp is faulty. However, regardless of whether the first lamp or the third lamp is faulty, the first lamp cannot continue to participate in the collaboration. Therefore, at this time, the second driving terminal is controlled to stop driving the second lamp to work, thereby causing the second lamp to stop working.
[0062] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of a second controller provided in an embodiment of this application. Figure 5The second controller shown may include a first control unit 2212, a first DC-DC converter 2211, a first high-speed serial interface (HSS), and a first controller area network (CAN) conversion unit 2214.
[0063] The first DC-DC converter 2211 is used to connect to the power input and convert the input voltage (Vbat) into a voltage suitable for the operation of the second lamp. Optionally, the power input can be a vehicle body controller or a battery, etc., without limitation. In this embodiment, the output terminal of the first DC-DC converter 2211 can be used as the second drive terminal. The first CAN conversion unit 2213 can be used for transmission and reception, specifically for transmitting and receiving signals or data, such as converting received signals or data into signals or data that the first control unit 2212 can understand, or converting signals or data output by the first control unit 2212 into CAN bus format. Optionally, the first CAN conversion unit 2213 can transmit and receive via CAN H and CAN L, with CAN H and CAN L transmitting positive and negative signals respectively to achieve differential signal transmission and improve anti-interference capability. The first HSS 2214 can output 12VDC, and the output terminal of the first HSS 2214 can be used as the first output terminal. Turn off the output of the first HSS2214, making the pin of the first HSS2214 floating, and thus the first lamp stops working.
[0064] In this embodiment, the control unit may be a microcontroller unit (MCU).
[0065] In one possible implementation, the third control module includes: At least one third controller, the third controller including a second output terminal, a third drive terminal and a second control unit, the second output terminal being connected to the first control module, the third drive terminal being used to connect to the third lamp, the second control unit being used to control the third drive terminal to drive the third lamp to work, and when the third drive terminal drives the third lamp to work, controlling the second output terminal to send a work indication signal to the first control module and to detect the current value of the third drive terminal. If the current value of the third drive terminal is less than a third preset threshold, it is determined that the third lamp has stopped working due to a fault, and the second output terminal is controlled to stop sending the work indication signal to the first control module.
[0066] In one possible implementation, the second control unit is further configured to detect the current value of the second output terminal when the control second output terminal sends a working indication signal to the first control module. If the current value of the second output terminal is less than a fourth preset threshold, the control third drive terminal is configured to stop driving the third lamp.
[0067] In this embodiment, if the current value of the second output terminal is less than the fourth preset threshold, it indicates that the first lamp or the second lamp is faulty. However, regardless of whether the first lamp or the second lamp is faulty, the first lamp cannot continue to participate in the cooperation. Therefore, at this time, the third driving terminal is controlled to stop driving the third lamp to work, thereby causing the third lamp to stop working.
[0068] In one possible implementation, the operation indication signal includes a pulse width modulation signal, which is used to control the brightness of the first lamp connected to the first control module.
[0069] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a third controller provided in an embodiment of this application. Figure 6 The third controller shown may include a second control unit 2312, a second DC-DC converter 2311, a second HSS 2314, and a second CAN conversion unit 2313.
[0070] The second DC-DC converter 2311 is used to connect to the power input and convert the input voltage (Vbat) into a voltage suitable for the operation of the third lamp. Optionally, the power input can be a body controller or a battery, etc., without limitation. In this embodiment, the output terminal of the second DC-DC converter 2311 can be used as the third drive terminal. The second CAN conversion unit 2313 can be used for transmission and reception, specifically for transmitting and receiving signals or data, such as converting received signals or data into signals or data that the second control unit 2312 can understand, or converting signals or data output by the second control unit 2312 into CAN bus format. Optionally, the second CAN conversion unit 2313 can transmit and receive via CAN H and CAN L, with CAN H and CAN L transmitting positive and negative signals respectively to achieve differential signal transmission and improve anti-interference capability. The second HSS 2314 can output a 12V PWM signal, and the output terminal of the second HSS 2314 can be used as the second output terminal. Turn off the output of the second HSS2314, making the pin of the second HSS2314 floating, and the second lamp will stop working.
[0071] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a control device for a lamp provided in another embodiment of this application. Figure 7 The illustrated device may include a first control device, a second control device, a third control device, and a fourth control device. The fourth control module 240 is connected to both the second control module 220 and the third control module 230. The fourth control module 240, in response to the activation of the second and third lamps, sends lamp activation signals to both the second and third control modules 220 and 230, respectively. This causes the second control module 220 to activate the second lamp and apply a preset voltage to the first control module 210, and causes the third control module 230 to activate the third lamp and send a work instruction signal to the first control module 210.
[0072] In this embodiment, the fourth control module 240 can be connected to the third control module 230 and the second control module 220 via a hardwired connection or a CAN bus. When the fourth control module 240 is connected to the third control module 230 and the second control module 220 via the CAN bus, the signals sent by the fourth control module 240 to the second control module 220 and the third control module 230 are CAN signals. Optionally, the second control module 220 and the third control module 230 can also be powered by the fourth control module 240. Optionally, the fourth control module 240 can also send a light-off signal to the second control module 220 and the third control module 230 in response to the operation of turning off the second and third lights, thereby causing the second control module 220 and the third control module 230 to turn off the second and third lights, and thus turning off the first light. Optionally, the fourth control module 240 may include at least one body controller.
[0073] In another possible implementation, the second control module 220 and the third control module 230 may control the second and third lamps to operate in response to an on operation of turning on the second and third lamps. Alternatively, the second control module 220 and the third control module 230 may control the second and third lamps to stop operating in response to an off operation of turning off the second and third lamps.
[0074] For example, the controller operation of the second and third controllers and the operation of the center position light can be represented by a logic table: Second lighting status Third lighting status First lamp output status normal normal Normal output Fault normal Stop output normal Fault Stop output Fault Fault Stop output It should be noted that the first, second, third, and fourth preset thresholds can be set as needed. Optionally, the first, second, third, and fourth preset thresholds can be set to the same threshold.
[0075] It should be noted that the lighting control device of this embodiment can be applied to scenarios including but not limited to the following: Application Scenario 1: When a vehicle has a third light in addition to the left and right combination lights. The circuit connection is driven by the left controller and the right light controller. A high-side switch of a P-type MOSFET (such as BTS100) can be used for driving. The left controller outputs a 12V power supply for direct drive, and the right controller outputs a PWM signal with a duty cycle of 0-100% at 200 Hz ± 15 Hz.
[0076] Application Scenario 2: The third luminaire participates in the regulatory light distribution, forming a single light together with the position lights on both sides. According to GB4785 requirements, when the third signal light participates in the regulatory light distribution, the failure of one light must simultaneously extinguish the other part of the area that forms the same function. When either of the position lights on both sides fails, its 12V power supply or PWM signal will also stop outputting. At this time, the central light controller cannot work and the corresponding function will be extinguished.
[0077] Application Scenario 3: When the lights have a dynamic welcome function, in addition to the left and right position lights illuminating, the center position lights (through lights, grille lights, logo lights, etc.) on the front and rear sides of the vehicle also participate in the dynamic illumination. The dynamic frequency is very high, requiring a fast response speed, necessitating the use of hardwired direct drive. The left and right light controllers store the dynamic program in the main control chip according to the set illumination sequence, execute the corresponding actions in chronological order, and output the corresponding ON / OFF signals and brightness control for the center position light drivers through the High Side Switch output port.
[0078] It should be understood that by transferring the drive of the automotive exterior and center lights from the traditional body controller to the headlight controller, the limited output drive resources in the body controller are saved. Since headlight controllers vary considerably depending on the vehicle's design, it is suitable to reserve resources based on the design. Regarding regulatory light distribution requirements, when one side's position light malfunctions, the center lights on that side must also be extinguished. This invention reduces the complexity of traditional control loops, directly, simply, and efficiently achieving the logic of extinguishing all lights when one is extinguished. In lighting fixtures with dynamic welcome functions, directly driving the center lights from the left / right light controller provides better real-time performance, faster response, and a smoother dynamic effect compared to a link via CAN signals from the headlight controller to the body controller to the center position light controller.
[0079] Please see Figure 8 , Figure 8 This is a schematic diagram of a lighting system provided in an embodiment of this application. Figure 8The lighting system shown may include a first luminaire 300, a second luminaire 400, a third luminaire 500, and a luminaire control device 200. The luminaire control device 200 may include a first control module 210, a second control module 220, and a third control module 23.
[0080] The control device for the lamps can be referred to the description in the above embodiment, and will not be repeated here.
[0081] This application also provides a vehicle including a lighting system as described in the above embodiments.
[0082] Please see Figure 9 , Figure 9 This is a flowchart illustrating a method for controlling a lighting fixture, as provided in an embodiment of this application. Figure 9 The method shown can be applied to the lighting control device of the above embodiment, such as... Figure 9 The methods shown may include: S910, the second control module receives the lamp-on signal and, in response to the lamp-on signal, drives the second lamp to operate, and while driving the second lamp to operate, applies a preset voltage to the first control module. S920, the third control module receives the lamp-on signal and, in response to the lamp-on signal, drives the third lamp to work, and sends a work instruction signal to the first control module when driving the third lamp to work.
[0083] S930, when the first control module is subjected to a preset voltage and receives a working instruction signal, it drives the first lamp to work.
[0084] S940, when the second lamp stops working, the second control module stops applying a preset voltage to the first control module, and / or, when the third lamp stops working, the third control module stops sending a working instruction signal to the first control module, so that the first control module stops driving the first lamp to work.
[0085] It should be noted that, in this embodiment, in response to the shutdown operation of the second and third lamps, the second control module controls the second lamp to stop working, and the third control module controls the third lamp to stop working. In this case, since the first control module cannot receive the working indication signal and cannot be applied with the preset voltage, the first control module will also stop the first lamp from working. Conversely, when the second or third lamp malfunctions, since the first control module cannot simultaneously receive the preset voltage and the working indication signal, it will also control the first lamp to work.
[0086] In one possible implementation, the second control module includes at least one second controller. The second controller includes a first output terminal, a second drive terminal, and a first control unit. The first output terminal is connected to the first control module, and the second drive terminal is connected to the second lamp. The second control module drives the second lamp to operate, and when driving the second lamp to operate, it applies a preset voltage to the first control module, including: The first control unit controls the second driving end to drive the second lamp to work, and when the second driving end drives the second lamp to work, it controls the first output end to apply a preset voltage to the first control module.
[0087] Correspondingly, when the second lamp stops working, the second control module stops applying a preset voltage to the first control module, including: When the first control unit drives the second lamp to work at the second drive end, it detects the current value at the second drive end; if the current value at the second drive end is less than the first preset threshold, it determines that the second lamp has stopped working due to a fault, and controls the first output end to stop applying the preset voltage to the first control module.
[0088] In one possible implementation, the method also includes: When the first control unit controls the first output terminal to apply a preset voltage to the first control module, it detects the current value of the first output terminal. If the current value of the first output terminal is less than the second preset threshold, it controls the second drive terminal to stop driving the second lamp.
[0089] In one possible implementation, the third control module includes at least one third controller, which includes a second output terminal, a third drive terminal, and a second control unit. The second output terminal is connected to the first control module, and the third drive terminal is connected to the third lamp. The third control module drives the third lamp to operate and, when driving the third lamp to operate, sends an operation indication signal to the first control module, including: The second control unit controls the third drive terminal to drive the third lamp to work, and when the third drive terminal drives the third lamp to work, it controls the second output terminal to send a work indication signal to the first control module. Correspondingly, when the third lamp stops working, the third control module stops sending working instruction signals to the first control module, including: When the second control unit drives the third lamp to work at the third drive end, it detects the current value at the third drive end. If the current value at the third drive end is less than the third preset threshold, it determines that the third lamp has stopped working due to a fault and controls the second output end to stop sending work indication signals to the first control module.
[0090] In one possible implementation, the method also includes: When the second control unit sends a working instruction signal from the second output terminal to the first control module, it detects the current value of the second output terminal. If the current value of the second output terminal is less than the fourth preset threshold, it controls the third drive terminal to stop driving the third lamp.
[0091] The control method in this embodiment can be referred to the description of the control device in the above embodiment, and will not be repeated here.
[0092] In this application, "multiple" refers to two or more.
[0093] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0094] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if any) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. “Multiple” means no fewer than two.
[0095] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship. "Multiple" refers to no fewer than two.
[0096] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if a method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if a method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.
[0097] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A control device for a lighting fixture, characterized in that, include: A first control module is used to connect to a first lamp to drive the first lamp to work when a preset voltage is applied and a work indication signal is received. The second control module is connected to the first control module. The second control module is used to connect to the second lamp to apply a preset voltage to the first control module when driving the second lamp to work, and to stop applying the preset voltage to the first control module when the second lamp stops working. A third control module is connected to the first control module. The third control module is used to connect to a third lamp to send a working instruction signal to the first control module when driving the third lamp to work, and to stop sending the working instruction signal to the first control module when the third lamp stops working.
2. The apparatus according to claim 1, characterized in that, The second control module includes: At least one second controller, the second controller including a first output terminal, a second drive terminal and a first control unit, the first output terminal being connected to the first control module, the second drive terminal being used to connect to the second lamp, the first control unit being used to control the second drive terminal to drive the second lamp to work, and when the second drive terminal drives the second lamp to work, controlling the first output terminal to apply a preset voltage to the first control module and detecting the current value of the second drive terminal, if the current value of the second drive terminal is less than a first preset threshold, then controlling the first output terminal to stop applying the preset voltage to the first control module.
3. The apparatus according to claim 2, characterized in that, The first control unit is further configured to detect the current value of the first output terminal when the first output terminal applies a preset voltage to the first control module, and if the current value of the first output terminal is less than a second preset threshold, control the second driving terminal to stop driving the second lamp to work.
4. The apparatus according to claim 1, characterized in that, The third control module includes: At least one third controller, the third controller including a second output terminal, a third drive terminal and a second control unit, the second output terminal being connected to the first control module, the third drive terminal being used to connect to the third lamp, the second control unit being used to control the third drive terminal to drive the third lamp to work, and when the third drive terminal drives the third lamp to work, controlling the second output terminal to send a work indication signal to the first control module and to detect the current value of the third drive terminal, if the current value of the third drive terminal is less than a third preset threshold, then controlling the second output terminal to stop sending the work indication signal to the first control module.
5. The method according to claim 4, characterized in that, The second control unit is further configured to detect the current value of the second output terminal when the second output terminal sends the working indication signal to the first control module, and if the current value of the second output terminal is less than a fourth preset threshold, control the third driving terminal to stop driving the third lamp to work.
6. The method according to claim 1, 4, or 5, characterized in that, The operating indication signal includes a pulse width modulation signal, which is used to control the brightness of the first lamp connected to the first control module.
7. The method according to claim 1, characterized in that, The device further includes: A fourth control module is connected to both the second and third control modules. The fourth control module is configured to send lamp-on signals to both the second and third control modules in response to the lamp-on operation. This causes the second control module to drive the second lamp to operate and apply a preset voltage to the first control module in response to the lamp-on signal. Similarly, the third control module is configured to drive the third lamp to operate and send a working indication signal to the first control module in response to the lamp-on signal.
8. A lighting system, characterized in that, It includes a first lamp, a second lamp, a third lamp, and the apparatus as described in any one of claims 1-7.
9. A vehicle, characterized in that, Including the lighting system as described in claim 8.
10. A method for controlling a lighting fixture, characterized in that, A control device for lighting fixtures, the device comprising a first control module, a second control module, and a third control module, wherein the first control module is connected to a first lighting fixture, the second control module is connected to a second lighting fixture, and the third control module is connected to a third lighting fixture; the method includes: The second control module receives the lamp-on signal and, in response to the lamp-on signal, drives the second lamp to work, and applies a preset voltage to the first control module when driving the second lamp to work; The third control module receives the lamp-on signal and, in response to the lamp-on signal, drives the third lamp to work. When driving the third lamp to work, it sends a work instruction signal to the first control module. The first control module drives the first lamp to work when a preset voltage is applied and when a work indication signal is received; When the second lamp stops working, the second control module stops applying a preset voltage to the first control module, and / or, when the third lamp stops working, the third control module stops sending the working indication signal to the first control module, so that the first control module stops driving the first lamp to work.