Control circuit for multi-signal brightening of rear combination lamp of automobile

Abstract

The utility model discloses a control circuit for multi-signal brightening of an automobile rear combination lamp. The control circuit comprises a signal receiving module, a voltage stabilizing module and a switch module, the input end of the signal receiving module is used for receiving a B lamp fault signal and a trunk door opening signal, the output end of the signal receiving module is connected with the input end of the voltage stabilizing module, the output end of the voltage stabilizing module is connected with the input end of the switch module, and the switch module is used for controlling on and off of an A lamp brightening power supply; and when any one of the B lamp fault signal and the trunk door opening signal is a low-level signal, the switch module is switched on. According to the multi-signal brightening control circuit for the rear combined lamp of the automobile provided by the utility model, when any one of the conditions that the LED of the lamp B fails and the door of the trunk is opened occurs, the lamp A can be brightened by inputting a low-level signal.

Description

Technical Field

[0001] The utility model relates to a multi-signal brightening control circuit for automobile rear combination lamps, belonging to the technical field of automobile lighting. Background Art

[0002] Currently, the most common rear lights on cars are dual-light configurations, known as AB lights. These consist of two relatively independent lights: the A light and the B light. The A light is a fixed light mounted above the bumper, while the B light is mounted on the tailgate and moves with the tailgate. Both the A and B lights serve as warning or illumination functions.

[0003] According to existing regulations, when a vehicle's rear combination lamp (B) fails, a fault signal is fed back to the A-lamp, brightening it. Alternatively, when the tailgate is opened, the vehicle body sends a signal to the A-lamp to brighten it. Existing solutions typically rely on a single high-level input for brightening, achieving this only through a high-level signal from the vehicle body. However, if, due to vehicle limitations, the input signal to the A-lamp is always low, and the A-lamp must be brightened in either the tailgate opening or the B-lamp LED failure, then this solution is not feasible. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art. The utility model provides a control circuit for multi-signal brightening of the rear combination lamps of an automobile. When either the LED of the B lamp fails or the tailgate is opened, the A lamp can be brightened by inputting a low-level signal.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A multi-signal brightening control circuit for automobile rear combination lamps, comprising a signal receiving module, a voltage stabilizing module and a switch module;

[0007] The input end of the signal receiving module is used to receive the B lamp fault signal and the trunk door opening signal, the output end of the signal receiving module is connected to the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is connected to the input end of the switch module, and the switch module is used to control the on and off of the A lamp brightening power supply;

[0008] When either the B lamp fault signal or the trunk door opening signal is a low level signal, the switch module is turned on.

[0009] Furthermore, the signal receiving module includes a common anode diode D1, the B light fault signal and the trunk door opening signal are respectively connected to the two cathodes of the common anode diode D1, the anode of the common anode diode D1 is connected to the input end of the voltage stabilizing module, and the two cathodes of the common anode diode D1 are respectively grounded through capacitors.

[0010] Furthermore, the signal receiving module includes a diode D4 and a diode D5, the anodes of the diode D4 and the diode D5 are both connected to the input end of the voltage stabilizing module, the cathode of the diode D4 is grounded through a capacitor, and the cathode of the diode D5 is grounded through a capacitor;

[0011] When the trunk door opening signal is connected to the cathode of diode D4, the B lamp fault signal is connected to the cathode of diode D5;

[0012] When the trunk door opening signal is connected to the cathode of the diode D5 , the B lamp failure signal is connected to the cathode of the diode D4 .

[0013] Furthermore, the voltage stabilizing module includes a voltage stabilizing diode D3, a resistor PR1 and a resistor PR2;

[0014] The cathode of the voltage regulator tube D2 is connected to the power supply VCC through the resistor PR2, the anode of the voltage regulator tube D2 is grounded, the resistor PR2 is connected in parallel at both ends of the voltage regulator tube D2, and the cathode of the voltage regulator tube D2 is connected to the output end of the signal receiving module.

[0015] Furthermore, the switch module includes a MOS transistor Q1, a MOS transistor Q2, a resistor PR3, a resistor PR4, a resistor PR5, a resistor PR6, a capacitor PC3 and a capacitor PC4;

[0016] The G terminal of the MOS transistor Q1 is connected to the output end of the voltage regulator module via the resistor PR3, the D terminal of the MOS transistor Q1 is connected to the G terminal of the MOS transistor Q2, and the S terminal of the MOS transistor Q1 is grounded; one end of the resistor PR4 is connected to the G terminal of the MOS transistor Q1, and the other end of the resistor PR4 is grounded; one end of the capacitor PC3 is connected to the G terminal of the MOS transistor Q1, and the other end of the capacitor PC3 is grounded;

[0017] The G electrode of the MOS transistor Q2 is connected to the power supply VCC through the resistor PR5, the D electrode of the MOS transistor Q2 is connected to the lamp A, and the S electrode of the MOS transistor Q2 is grounded; one end of the resistor PR6 is connected to the G electrode of the MOS transistor Q2, and the other end of the resistor PR6 is grounded; one end of the capacitor PC43 is connected to the G electrode of the MOS transistor Q2, and the other end of the capacitor PC4 is grounded.

[0018] Furthermore, the switch module includes a transistor Q3, a resistor PR7, a voltage regulator D3, a resistor PR8, a resistor PR9, a capacitor PC5 and a MOS tube Q4;

[0019] The base of the transistor Q3 is connected to the output end of the voltage stabilizing module, the emitter of the transistor Q3 is connected to the power supply VCC through the resistor PR7, the emitter of the transistor Q3 is connected to the cathode of the voltage stabilizing tube D3, the anode of the voltage stabilizing tube D3 is grounded, and the collector of the transistor Q3 is connected to the G terminal of the MOS tube Q4 through the resistor PR8;

[0020] The D pole of the MOS tube Q4 is connected to the A lamp, the S pole of the MOS tube Q4 is grounded, one end of the resistor PR9 is connected to the G pole of the MOS tube Q4, and the other end of the resistor PR9 is grounded, one end of the capacitor PC5 is connected to the G pole of the MOS tube Q4, and the other end of the capacitor PC5 is grounded.

[0021] By adopting the above technical solution, the utility model uses OR gate logic judgment, and the signal receiving module receives a low-level signal of B lamp failure and a low-level signal of trunk door opening. As long as any one of the signals is a low-level signal, the A lamp can achieve a brightening effect. When the trunk door is closed or the B lamp LED is normal, that is, both signals are high-level, the circuit does not brighten, thereby meeting regulatory requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a functional block diagram of the control circuit for multi-signal brightening of the rear combination lamps of an automobile according to the present invention;

[0023] Figure 2 This is a circuit schematic diagram of a control circuit for multi-signal brightening of automobile rear combination lamps according to a first embodiment of the present utility model;

[0024] Figure 3 This is a circuit schematic diagram of a signal receiving module according to the second embodiment of the present invention;

[0025] Figure 4 This is a circuit diagram of the switch module of the third embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0027] Example 1

[0028] like Figure 1 As shown, this embodiment provides a control circuit for multi-signal brightening of rear combination lamps of an automobile, which includes a signal receiving module, a voltage stabilizing module and a switch module;

[0029] The input end of the signal receiving module is used to receive the B lamp fault signal and the tailgate opening signal. The output end of the signal receiving module is connected to the input end of the voltage stabilizing module. The output end of the voltage stabilizing module is connected to the input end of the switch module. The switch module is used to control the on and off of the A lamp brightening power supply.

[0030] When either the B lamp fault signal or the tailgate opening signal is a low level signal, the switch module is turned on.

[0031] like Figure 2 As shown, the signal receiving module of this embodiment includes a common anode diode D1, the B light fault signal and the trunk door opening signal are respectively connected to the two cathodes of the common anode diode D1, the anode of the common anode diode D1 is connected to the input end of the voltage stabilizing module, and the two cathodes of the common anode diode D1 are respectively grounded through capacitors (PC1, PC2).

[0032] like Figure 2 As shown, the voltage stabilization module of this embodiment includes a voltage regulator diode D3, a resistor PR1, and a resistor PR2. The cathode of the voltage regulator diode D2 is connected to the power supply VCC via the resistor PR2, the anode of the voltage regulator diode D2 is grounded, the resistor PR2 is connected in parallel across the voltage regulator diode D2, and the cathode of the voltage regulator diode D2 is connected to the output terminal of the signal receiving module.

[0033] like Figure 2 As shown, the switch module of this embodiment includes a MOS transistor Q1, a MOS transistor Q2, a resistor PR3, a resistor PR4, a resistor PR5, a resistor PR6, a capacitor PC3 and a capacitor PC4;

[0034] The G terminal of the MOS transistor Q1 is connected to the output terminal of the voltage regulator module through the resistor PR3. The D terminal of the MOS transistor Q1 is connected to the G terminal of the MOS transistor Q2. The S terminal of the MOS transistor Q1 is grounded. One end of the resistor PR4 is connected to the G terminal of the MOS transistor Q1. The other end of the resistor PR4 is grounded. One end of the capacitor PC3 is connected to the G terminal of the MOS transistor Q1. The other end of the capacitor PC3 is grounded.

[0035] The G terminal of the MOS transistor Q2 is connected to the power supply VCC through the resistor PR5, the D terminal of the MOS transistor Q2 is connected to the lamp A, and the S terminal of the MOS transistor Q2 is grounded; one end of the resistor PR6 is connected to the G terminal of the MOS transistor Q2, and the other end of the resistor PR6 is grounded; one end of the capacitor PC43 is connected to the G terminal of the MOS transistor Q2, and the other end of the capacitor PC4 is grounded.

[0036] In this implementation, PL-SIG represents the trunk door open signal, and PN-1SIG represents the B-lamp fault signal. When either PL-SIG or PN-1SIG is low, the voltage at point ① is pulled down by the low signal. At this point, the voltage at MOSFET Q1 is insufficient to conduct, and the G terminal of MOSFET Q2 is high, turning on Q2 to achieve a brighter state. When the trunk door is closed or the B-lamp LED is functioning properly (i.e., PL-SIG and PN-1SIG are high), point ① is high, turning on MOSFET Q1 and pulling the G terminal of MOSFET Q2 low to prevent conduction. At this point, lamp A appears dimmed. This solution achieves the brighter state through OR gate logic. As long as either signal is low, VCC is pulled down by the low signal, controlling both MOSFETs Q1 and Q2 to achieve brighter state.

[0037] Example 2

[0038] like Figure 3 As shown, this embodiment provides another implementation of a signal receiving module, which includes a diode D4 and a diode D5. The anodes of the diodes D4 and D5 are both connected to the input end of the voltage stabilizing module, the cathode of the diode D4 is grounded via a capacitor PC1, and the cathode of the diode D5 is grounded via a capacitor PC2.

[0039] When the trunk door open signal is connected to the cathode of diode D4, the B lamp fault signal is connected to the cathode of diode D5;

[0040] When the tailgate opening signal is connected to the cathode of diode D5, the B lamp fault signal is connected to the cathode of diode D4.

[0041] The operating principle of this embodiment is the same as that of the first embodiment. PL-SIG represents the trunk door opening signal, and PN-1SIG represents the B lamp fault signal. When either PL-SIG or PN-1SIG is low, the voltage at point ① is pulled down by the low signal. At this point, the voltage at MOSFET Q1 is insufficient to conduct, and the G terminal of MOSFET Q2 is high, turning on Q2 to achieve a brighter state. When the trunk door is closed and the B lamp LED is functioning properly (i.e., both PL-SIG and PN-1SIG are high), point ① is high, turning on MOSFET Q1 and pulling the G terminal of MOSFET Q2 low, turning it off. At this point, lamp A appears dimmed. This solution achieves the brighter state through OR gate logic. As long as either signal is low, VCC is pulled down by the low signal, thereby controlling both MOSFETs Q1 and Q2 to achieve brighter state.

[0042] Example 3

[0043] like Figure 4As shown, this embodiment provides another implementation of a switch module, which includes a transistor Q3, a resistor PR7, a voltage regulator D3, a resistor PR8, a resistor PR9, a capacitor PC5 and a MOS tube Q4;

[0044] The base of the transistor Q3 is connected to the output end of the voltage regulator module, the emitter of the transistor Q3 is connected to the power supply VCC through the resistor PR7, the emitter of the transistor Q3 is connected to the cathode of the voltage regulator tube D3, the anode of the voltage regulator tube D3 is grounded, and the collector of the transistor Q3 is connected to the G terminal of the MOS tube Q4 through the resistor PR8;

[0045] The D pole of the MOS tube Q4 is connected to the A lamp, the S pole of the MOS tube Q4 is grounded, one end of the resistor PR9 is connected to the G pole of the MOS tube Q4, the other end of the resistor PR9 is grounded, one end of the capacitor PC5 is connected to the G pole of the MOS tube Q4, and the other end of the capacitor PC5 is grounded.

[0046] In this implementation, PL-SIG represents the trunk door open signal, and PN-1SIG represents the B lamp fault signal. When either PL-SIG or PN-1SIG is low, the voltage at point ① is pulled low by the low signal. Transistor Q3 conducts, and the G terminal of MOS transistor Q4 is high, turning on MOS transistor Q4 to achieve a brighter light effect. When the trunk door is closed or the B lamp LED is functioning properly (i.e., PL-SIG and PN-1SIG are high), point ① is high, transistor Q3 is off, and the G terminal of MOS transistor Q4 is low. At this point, lamp A appears dimmed. This solution achieves the brighter light effect through OR gate logic. As long as either signal is low, VCC is pulled low by the low signal, thereby controlling transistor Q3 and MOS transistor Q4 to achieve brighter light.

[0047] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control circuit for multi-signal brightening of rear combination lamps of an automobile, characterized by: It includes a signal receiving module, a voltage stabilizing module and a switch module; The input end of the signal receiving module is used to receive the B lamp fault signal and the trunk door opening signal, the output end of the signal receiving module is connected to the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is connected to the input end of the switch module, and the switch module is used to control the on and off of the A lamp brightening power supply; When either the B lamp fault signal or the trunk door opening signal is a low level signal, the switch module is turned on.

2. The multi-signal brightening control circuit for automobile rear combination lamps according to claim 1, characterized in that: The signal receiving module includes a common anode diode D1, the B light fault signal and the trunk door opening signal are respectively connected to the two cathodes of the common anode diode D1, the anode of the common anode diode D1 is connected to the input end of the voltage stabilizing module, and the two cathodes of the common anode diode D1 are respectively grounded through capacitors.

3. The multi-signal brightening control circuit for automobile rear combination lamps according to claim 1, characterized in that: The signal receiving module includes a diode D4 and a diode D5, wherein the anodes of the diodes D4 and D5 are both connected to the input end of the voltage stabilizing module, the cathode of the diode D4 is grounded via a capacitor, and the cathode of the diode D5 is grounded via a capacitor; When the trunk door opening signal is connected to the cathode of diode D4, the B lamp fault signal is connected to the cathode of diode D5; When the trunk door opening signal is connected to the cathode of the diode D5 , the B lamp failure signal is connected to the cathode of the diode D4 .

4. The multi-signal brightening control circuit for automobile rear combination lamps according to claim 1, characterized in that: The voltage stabilizing module includes a voltage stabilizing tube D3, a resistor PR1 and a resistor PR2; The cathode of the voltage regulator tube D2 is connected to the power supply VCC through the resistor PR2, the anode of the voltage regulator tube D2 is grounded, the resistor PR2 is connected in parallel at both ends of the voltage regulator tube D2, and the cathode of the voltage regulator tube D2 is connected to the output end of the signal receiving module.

5. The multi-signal brightening control circuit for automobile rear combination lamps according to claim 1, characterized in that: The switch module includes a MOS transistor Q1, a MOS transistor Q2, a resistor PR3, a resistor PR4, a resistor PR5, a resistor PR6, a capacitor PC3 and a capacitor PC4; The G terminal of the MOS transistor Q1 is connected to the output end of the voltage regulator module via the resistor PR3, the D terminal of the MOS transistor Q1 is connected to the G terminal of the MOS transistor Q2, and the S terminal of the MOS transistor Q1 is grounded; one end of the resistor PR4 is connected to the G terminal of the MOS transistor Q1, and the other end of the resistor PR4 is grounded; one end of the capacitor PC3 is connected to the G terminal of the MOS transistor Q1, and the other end of the capacitor PC3 is grounded; The G electrode of the MOS transistor Q2 is connected to the power supply VCC through the resistor PR5, the D electrode of the MOS transistor Q2 is connected to the lamp A, and the S electrode of the MOS transistor Q2 is grounded; one end of the resistor PR6 is connected to the G electrode of the MOS transistor Q2, and the other end of the resistor PR6 is grounded; one end of the capacitor PC43 is connected to the G electrode of the MOS transistor Q2, and the other end of the capacitor PC4 is grounded.

6. The multi-signal brightening control circuit for automobile rear combination lamps according to claim 1, characterized in that: The switch module includes a transistor Q3, a resistor PR7, a voltage regulator D3, a resistor PR8, a resistor PR9, a capacitor PC5 and a MOS tube Q4; The base of the transistor Q3 is connected to the output end of the voltage stabilizing module, the emitter of the transistor Q3 is connected to the power supply VCC through the resistor PR7, the emitter of the transistor Q3 is connected to the cathode of the voltage stabilizing tube D3, the anode of the voltage stabilizing tube D3 is grounded, and the collector of the transistor Q3 is connected to the G terminal of the MOS tube Q4 through the resistor PR8; The D pole of the MOS tube Q4 is connected to the A lamp, the S pole of the MOS tube Q4 is grounded, one end of the resistor PR9 is connected to the G pole of the MOS tube Q4, and the other end of the resistor PR9 is grounded, one end of the capacitor PC5 is connected to the G pole of the MOS tube Q4, and the other end of the capacitor PC5 is grounded.

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