Control device for multi-color decorative lights and vehicles
By using a multi-color decorative light control device, and by employing input filtering and protection circuits and PWM wave control, the problem of low brightness of RGB LED lights has been solved, enabling color recognition in daytime environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SAIC GM WULING AUTOMOBILE CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-06-30
AI Technical Summary
Existing RGB LED lights rely on MCU driving and control, resulting in low current and low brightness, making it difficult to identify colors in daylight.
A multi-color decorative light control device is adopted, including an input filter circuit, an input protection circuit, a first colored light, a second colored light, and a third colored light. The lights are turned on and off by PWM wave, and higher power LED lights are used to improve brightness.
It enables easy identification of light colors even in daytime environments, with a simple and reliable circuit and improved brightness.
Smart Images
Figure CN224439235U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive technology, specifically to a multi-color decorative light control device and a vehicle including the multi-color decorative light control device. Background Technology
[0002] In recent years, ambient lighting, as a product used to decorate cars and create ambiance, has gradually become popular from high-end models to mid-range models. Related technologies for automotive ambient lighting primarily involve controlling RGB tri-color LEDs, changing their color and brightness according to user needs to create different lighting effects.
[0003] However, since the commonly used RGB LEDs rely on the driving and control of MCU (microcontroller unit), their current is small and their brightness is low, making it difficult to easily identify their color in daytime environments. Utility Model Content
[0004] In order to effectively overcome the problems existing in the prior art, the main purpose of this application is to provide a multi-color decorative light control device and vehicle that can easily identify the light color and has a simple and reliable circuit.
[0005] To achieve the above objectives, this application specifically adopts the following technical solution:
[0006] This application provides a multi-color decorative light control device applied to a vehicle. The vehicle includes a battery and a vehicle control module. The battery is connected to the vehicle control module, and the vehicle control module includes a power supply terminal, a first control terminal, a second control terminal, and a third control terminal. The multi-color decorative light control device includes:
[0007] An input filter circuit, which is electrically connected to the power supply terminal;
[0008] An input protection circuit is electrically connected to the input filter circuit.
[0009] The first colored light, the positive terminal of the first colored light is electrically connected to the input protection circuit, and the negative terminal of the first colored light is electrically connected to the first control terminal.
[0010] The second colored light has its positive terminal electrically connected to the input protection circuit and its negative terminal electrically connected to the second control terminal.
[0011] The positive terminal of the third colored light is electrically connected to the input protection circuit, and the negative terminal of the third colored light is electrically connected to the third control terminal.
[0012] In some embodiments, the first control terminal is used to control the first colored light to turn on or off via a PWM wave, the second control terminal is used to control the second colored light to turn on or off via a PWM wave, and the third control terminal is used to control the third colored light to turn on or off via a PWM wave.
[0013] In some embodiments, the first colored light is lit when the duty cycle of the PWM wave output by the first control terminal is 0%, and the first colored light is turned off when the duty cycle of the PWM wave output by the first control terminal is 100%.
[0014] In some embodiments, when the duty cycle of the PWM wave output by the second control terminal is 0%, the second colored light is lit, and when the duty cycle of the PWM wave output by the second control terminal is 100%, the second colored light is turned off.
[0015] In some embodiments, the third colored light is lit when the duty cycle of the PWM wave output by the third control terminal is 0%, and the third colored light is turned off when the duty cycle of the PWM wave output by the third control terminal is 100%.
[0016] In some embodiments, the first colored light is a red LED light that emits red light, the second colored light is a green LED light that emits green light, and the third colored light is a blue LED light that emits blue light.
[0017] In some embodiments, the input filter circuit includes diode D1, diode D2, capacitor C1, capacitor C2, capacitor C3, capacitor C4, resistor R1, resistor R2, and resistor R3.
[0018] The positive terminal of diode D1 is connected to the power supply terminal, the negative terminal of diode D1 is connected to one end of resistor R1, the other end of resistor R1 is connected to the input protection circuit, capacitor C1, capacitor C2 and diode D2 are connected in series and then in parallel with diode D1, capacitor C3 is connected in parallel with diode D2, capacitor C4 is connected to the output terminal of resistor R1, the two ends of resistor R2 are connected to capacitor C3 and capacitor C4 respectively, and resistor R3 is connected to the negative terminal of diode D1.
[0019] In some embodiments, the input protection circuit includes capacitors C5, C6, C7, C8, C9 and inductor L1. One end of inductor L1 is connected to the output terminal of resistor R1, and the other end of inductor L1 is connected to the first colored light, the second colored light and the third colored light. Capacitor C5 is connected to one end of inductor L1, and capacitors C6, C7, C8 and C9 are connected to the other end of inductor L1.
[0020] Accordingly, this application also provides a vehicle, which includes a battery, a vehicle control module, and a multi-color decorative light control device as described in any of the above embodiments. The battery is connected to the vehicle control module, which includes a power supply terminal, a first control terminal, a second control terminal, and a third control terminal. The multi-color decorative light control device is connected to the power supply terminal, the first control terminal, the second control terminal, and the third control terminal.
[0021] In some embodiments, the first control terminal, the second control terminal, and the third control terminal are configured as pulse width modulation circuits.
[0022] The multi-color decorative light control device of this application includes an input filter circuit, an input protection circuit, a first colored light, a second colored light, and a third colored light. The input filter circuit is electrically connected to the power supply terminal of the vehicle control module, and the input protection circuit is electrically connected to the input filter circuit. The positive terminals of the first, second, and third colored lights are respectively electrically connected to the input protection circuit. The negative terminal of the first colored light is electrically connected to the first control terminal of the vehicle control module, the negative terminal of the second colored light is electrically connected to the second control terminal of the vehicle control module, and the negative terminal of the third colored light is electrically connected to the third control terminal of the vehicle control module. Compared with the prior art, the multi-color decorative light control device of this application has a simple and reliable circuit, and can use higher power LEDs to improve brightness, thus enabling easy identification even in daytime environments. Attached Figure Description
[0023] Figure 1 A circuit diagram of a multi-color decorative lamp control device provided in an embodiment of this application.
[0024] Figure 2 A circuit diagram of the input filtering circuit provided in an embodiment of this application.
[0025] Figure 3 A circuit diagram of the input protection circuit provided in an embodiment of this application. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0027] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0028] In related technologies, automotive ambient lighting control systems may include DC-DC constant current chips, MCU control chips, CAN / LIN (Controller Area Network / Serial Communication Network) communication chips, and RGB LED light sources. During operation, the automotive battery provides the operating voltage to the DC-DC constant current chip, which in turn powers the MCU control chip and the CAN / LIN communication chip, which in turn powers the RGB LEDs. When the CAN / LIN communication chip receives a lighting signal from the vehicle bus, it transmits it to the MCU control chip, which then controls the RGB LEDs to light up. This lighting signal includes color and brightness signals. The MCU control chip controls the brightness and color of the red, green, and blue light sources in the RGB LEDs based on these signals, achieving different color mixing effects. However, because commonly used RGB LEDs rely on MCU driving and control, their current is relatively low, resulting in low brightness and making their colors difficult to discern in daylight. Therefore, the inventors of this application propose a multi-color decorative light control device that can use higher-power LEDs to increase brightness, making them easily identifiable even in daylight, and with a simple and reliable circuit.
[0029] An embodiment of this application discloses a vehicle, which includes a vehicle body and a multi-color decorative light control device. The multi-color decorative light control device is installed on the vehicle body and can emit lights of various colors, so that the lights of various colors can be used as fault indicator lights, turn signals, intelligent driving indicator lights, charging completion indicator lights, etc.
[0030] Reference Figure 1As shown, the vehicle body includes a battery and a vehicle control module. The battery can be a 12V battery. The vehicle control module includes a VBAT terminal, a GND terminal, a power supply terminal, a first control terminal, a second control terminal, and a third control terminal. The positive terminal of the battery is connected to the VBAT terminal of the vehicle control module, and the negative terminal of the battery is connected to the GND terminal of the vehicle control module. The multi-color decorative light control device includes an input filter circuit, an input protection circuit, a first colored light, a second colored light, and a third colored light. The input filter circuit is electrically connected to the power supply terminal, and the input protection circuit is electrically connected to the input filter circuit. The positive terminal of the first colored light is electrically connected to the input protection circuit, and the negative terminal of the first colored light is electrically connected to the first control terminal. The positive terminal of the second colored light is electrically connected to the input protection circuit, and the negative terminal of the second colored light is electrically connected to the second control terminal. The positive terminal of the third colored light is electrically connected to the input protection circuit, and the negative terminal of the third colored light is electrically connected to the third control terminal. This allows the battery to provide power to the vehicle control module, which in turn provides power to the first, second, and third colored lights.
[0031] Specifically, the input filter circuit can be used to filter out the ripple in the voltage output from the power supply terminal, and the input protection circuit can be used to provide overcurrent protection for the first, second, and third colored lights to prevent them from burning out due to excessive current. The first control terminal can be used to control the first colored light to turn on or off via a PWM (Pulse Width Modulation) wave, the second control terminal can be used to control the second colored light to turn on or off via a PWM wave, and the third control terminal can be used to control the third colored light to turn on or off via a PWM wave. The first, second, and third control terminals can all be pulse width modulation circuits.
[0032] For example, when the duty cycle of the PWM wave output by the first control terminal is 0%, there is a voltage difference across the first colored light, and the first colored light is lit and at its highest brightness; when the duty cycle of the PWM wave output by the first control terminal is 100%, there is no voltage difference across the first colored light, and the first colored light is off. When the duty cycle of the PWM wave output by the second control terminal is 0%, there is a voltage difference across the second colored light, and the second colored light is lit and at its highest brightness; when the duty cycle of the PWM wave output by the second control terminal is 100%, there is no voltage difference across the second colored light, and the second colored light is off. When the duty cycle of the PWM wave output by the third control terminal is 0%, there is a voltage difference across the third colored light, and the third colored light is lit and at its highest brightness; when the duty cycle of the PWM wave output by the third control terminal is 100%, there is no voltage difference across the third colored light, and the third colored light is off. When the PWM signals output by the first, second, and third control terminals change with a preset duty cycle, the multi-color decorative light control device can change to different colors of light to present different light show effects.
[0033] In this embodiment, the first colored light can be a red LED that emits red light, the second colored light can be a green LED that emits green light, and the third colored light can be a blue LED that emits blue light. Referring to Table 1, when the first, second, and third control terminals output PWM waves with different duty cycles, the red, green, and blue LEDs are in different on or off states, and the mixed light can present different colors.
[0034]
[0035] Table 1 Control Logic for Different Colored Lights
[0036] In Table 1, the red light in Scenario 1 can be used as a fault indicator, the blue light in Scenario 5 can be used as a smart driving indicator, and the green light in Scenario 7 can be used as a charging completion indicator. Additionally, if the PWM signals output by the first, second, and third control terminals alternate synchronously with 0% and 100% duty cycles, the controlled colored lights can flash. Assuming each duty cycle lasts from 250ms to 500ms, the flashing yellow light in Scenario 2 can be used as a turn signal, and the flashing green light in Scenario 7 can be used as a charging indicator.
[0037] Reference Figure 2 As shown, the input filter circuit includes diodes D1 and D2, capacitors C1, C2, C3, and C4, and resistors R1, R2, and R3. The anode of diode D1 is connected to the power supply terminal, and the cathode of diode D1 is connected to one end of resistor R1. One end of capacitor C1 is connected to the anode of diode D1, and the other end of capacitor C1 is connected to one end of capacitor C2. The two ends of diode D2 are connected to the other end of capacitor C2 and the cathode of diode D1, respectively. The two ends of capacitor C3 are connected to the two ends of diode D2, respectively. Capacitor C4 is connected to the output terminal of resistor R1, and the two ends of resistor R2 are connected to capacitors C3 and C4, respectively. Resistor R3 is connected to the cathode of diode D1.
[0038] Reference Figure 3 As shown, the input protection circuit includes capacitors C5, C6, C7, C8, C9 and inductor L1. One end of inductor L1 is connected to the output terminal of resistor R1, and the other end of inductor L1 is connected to the first colored light, the second colored light and the third colored light. Capacitor C5 is connected to one end of inductor L1, and capacitors C6, C7, C8 and C9 are connected to the other end of inductor L1.
[0039] The multi-color decorative light control device of this application has a simple and reliable circuit, and can use higher power LEDs to increase brightness, so that it can be easily identified in daytime environments.
[0040] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A multi-color decorative light control device applied to a vehicle, the vehicle comprising a storage battery and a vehicle control module, the storage battery being connected with the vehicle control module, the vehicle control module comprising a power supply end, a first control end, a second control end and a third control end; characterized in that, The multi-color decorative light control device includes: An input filter circuit, which is electrically connected to the power supply terminal; An input protection circuit is electrically connected to the input filter circuit. The first colored light, the positive terminal of the first colored light is electrically connected to the input protection circuit, and the negative terminal of the first colored light is electrically connected to the first control terminal; The second colored light has its positive terminal electrically connected to the input protection circuit and its negative terminal electrically connected to the second control terminal. The positive terminal of the third colored light is electrically connected to the input protection circuit, and the negative terminal of the third colored light is electrically connected to the third control terminal.
2. The multi-color decorative light control device of claim 1, wherein, The first control terminal is used to control the first colored light to turn on or off via a PWM wave, the second control terminal is used to control the second colored light to turn on or off via a PWM wave, and the third control terminal is used to control the third colored light to turn on or off via a PWM wave.
3. The multi-color decorative light control device of claim 2, wherein, When the duty cycle of the PWM wave output by the first control terminal is 0%, the first colored light is lit; when the duty cycle of the PWM wave output by the first control terminal is 100%, the first colored light is turned off.
4. The multi-color decorative light control device according to claim 2, characterized in that, When the duty cycle of the PWM wave output from the second control terminal is 0%, the second colored light is lit; when the duty cycle of the PWM wave output from the second control terminal is 100%, the second colored light is turned off.
5. The multi-color decorative light control device according to claim 2, characterized in that, When the duty cycle of the PWM wave output from the third control terminal is 0%, the third colored light is lit; when the duty cycle of the PWM wave output from the third control terminal is 100%, the third colored light is turned off.
6. The multi-color decorative light control device according to claim 2, characterized in that, The first colored light is a red LED that emits red light, the second colored light is a green LED that emits green light, and the third colored light is a blue LED that emits blue light.
7. The multi-color decorative light control device according to claim 1, characterized in that, The input filter circuit includes diode D1, diode D2, capacitor C1, capacitor C2, capacitor C3, capacitor C4, resistor R1, resistor R2, and resistor R3. The positive terminal of diode D1 is connected to the power supply terminal, the negative terminal of diode D1 is connected to one end of resistor R1, the other end of resistor R1 is connected to the input protection circuit, capacitor C1, capacitor C2 and diode D2 are connected in series and then in parallel with diode D1, capacitor C3 is connected in parallel with diode D2, capacitor C4 is connected to the output terminal of resistor R1, the two ends of resistor R2 are connected to capacitor C3 and capacitor C4 respectively, and resistor R3 is connected to the negative terminal of diode D1.
8. The multi-color decorative light control device according to claim 7, characterized in that, The input protection circuit includes capacitors C5, C6, C7, C8, C9 and inductor L1. One end of inductor L1 is connected to the output terminal of resistor R1, and the other end of inductor L1 is connected to the first colored light, the second colored light and the third colored light. Capacitor C5 is connected to one end of inductor L1, and capacitors C6, C7, C8 and C9 are connected to the other end of inductor L1.
9. A vehicle, characterized in that, The device includes a battery, a vehicle control module, and a multi-color decorative light control device as described in any one of claims 1 to 8. The battery is connected to the vehicle control module, which includes a power supply terminal, a first control terminal, a second control terminal, and a third control terminal. The multi-color decorative light control device is connected to the power supply terminal, the first control terminal, the second control terminal, and the third control terminal.
10. The vehicle according to claim 9, characterized in that, The first control terminal, the second control terminal, and the third control terminal are configured as pulse width modulation circuits.