Rear combination lamp power supply switching system, rear combination lamp and vehicle thereof

Abstract

The invention relates to the technical field of automobile lamps, in particular to a rear combination lamp power switching system, a rear combination lamp and a vehicle with the rear combination lamp. The system comprises a first power supply processing module, a second power supply processing module and a vehicle lamp controller, the first power supply processing module comprises a first power supply protection unit which is connected with a position lamp power supply line; the first signal processing unit is connected with the first power supply protection unit; the first power supply protection unit and the first signal processing unit are connected with the output control unit; the first signal detection unit is connected with a position lamp power supply line; the second power supply processing unit comprises a second power supply protection unit connected with a brake lamp power supply line; the second power supply protection unit and the first signal processing unit are connected with the second signal processing unit; the second signal detection unit is connected with the brake lamp power supply line; and the first signal detection unit and the second signal detection unit have the same structure and are connected with the vehicle lamp controller. Faults can be prevented from being misreported, and user experience is good.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile lamps, and in particular to a rear combination lamp power supply switching system, a rear combination lamp and a vehicle thereof. Background Art

[0002] As a standard component of automobiles, the rear combination lamps are equipped on all vehicles, whether they are large or small buses, trucks or other vehicles. Due to the need to realize different functions, the rear combination lamps generally include brake lights and position lights. When realizing the brake light function or the position light function, the two lamps will complement each other. For example, when the brake light function is turned on, the lamp beads of the position light are controlled to light up at a certain brightness to achieve the lamp effect of the brake light. For the rear combination lamp powered by the car light controller, only one of the power supply lines of the position light / brake light is needed, and the driver modules of the brake light function and the position light function can be powered on and work.

[0003] The headlight controller generally detects the current on the power supply line to identify whether the function is normal. When switching functions, in order to ensure that the lamp will not turn off and then turn on again, two power supply lines are set to supply power to the brake light and the position light respectively. When the two power supply lines are powered together, the two power supplies will be divided, causing the headlight controller to determine that the current on both power supply lines is out of range, thereby falsely reporting a fault and poor user experience. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problem that the prior art rear combination lamp power supply will falsely report a fault when it is powered on, resulting in a poor user experience, the present invention provides a rear combination lamp power supply switching system to avoid false reporting of a fault when the rear combination lamp power supply is powered on, providing a good user experience.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a rear combination lamp power switching system, comprising: a first power processing module, a second power processing module, and a lamp controller;

[0006] The first power processing module is connected to the second power processing module;

[0007] The first power processing module and the second power processing module are both connected to the vehicle light controller;

[0008] The first power processing module includes:

[0009] A first power protection unit connected to a power supply line of the position light;

[0010] A first signal processing unit, connected to the first power protection unit;

[0011] An output control unit, the first power protection unit and the first signal processing unit are both connected to the output control unit;

[0012] A first signal detection unit is connected to the position light power supply line

[0013] The second power processing module includes:

[0014] A second power supply protection unit connected to the brake light power supply line;

[0015] a second signal processing unit, the second power protection unit and the first signal processing unit are both connected to the second signal processing unit;

[0016] a second signal detection unit connected to the brake light power supply line;

[0017] The first signal detection unit and the second signal detection unit have the same structure and are both connected to the vehicle light controller.

[0018] Further, specifically, the first signal detection unit and the second signal detection unit both include: a first diode, a first resistor, a second resistor, a third resistor, a first capacitor and a first transistor; the anode of the first diode is the signal input end of the first signal detection unit or the second signal detection unit, the cathode of the first diode is connected to one end of the first resistor, the second resistor and the first capacitor are connected in parallel, one end after the parallel connection and the base of the first transistor are both connected to the other end of the first resistor, the other end after the parallel connection and the emitter of the first transistor are both connected to a common ground end, one end of the third resistor is connected to a 5V power supply end, and the other end is connected to the collector of the first transistor, and the collector of the first transistor is also connected to a car light controller.

[0019] Further, specifically, the first power protection unit includes a first transient suppression diode, a second capacitor, a third capacitor and a second diode; the first transient suppression diode is connected to the position light power supply line, the first transient suppression diode, the second capacitor and the third capacitor are connected in parallel, one end of the connection is connected to the anode of the second diode, and the other end is connected to the common ground; the cathode of the second diode is the output end of the first power protection unit.

[0020] Further, specifically, the first signal processing unit includes a fourth resistor, a fifth resistor and a second transistor; one end of the fourth resistor is connected to the output end of the first power protection unit, the other end of the fourth resistor and one end of the fifth resistor are both connected to the base of the second transistor, the other end of the fifth resistor and the emitter of the second transistor are both connected to the common ground terminal, and the collector of the second transistor is connected to the output control unit.

[0021] Further, specifically, the output control unit includes a voltage regulator tube, a sixth resistor, a seventh resistor and a MOS tube; the cathode of the voltage regulator tube, one end of the sixth resistor and the source of the MOS tube are all connected to the output end of the first power protection unit, the anode of the voltage regulator tube, the other end of the sixth resistor and one end of the seventh resistor are all connected to the gate of the MOS tube, the other end of the seventh resistor is connected to the collector of the second transistor, and the drain of the MOS tube is the output end of the output control unit.

[0022] Further, specifically, the second power protection unit includes a second transient suppression diode, a fourth capacitor, a fifth capacitor, a third diode and a fourth diode; the anodes of the second transient suppression diode and the third diode are both connected to the brake light power supply line, the cathode of the third diode is connected to the second signal processing unit, the second transient suppression diode, the fourth capacitor and the fifth capacitor are connected in parallel, one end of the parallel connection is connected to the anode of the fourth diode, the other end of the parallel connection is connected to the common ground, and the cathode of the fourth diode is connected to the collector of the second transistor.

[0023] Further, specifically, the second signal processing unit includes: an eighth resistor, a ninth resistor and a third transistor; one end of the eighth resistor is connected to the cathode of the third diode, the other end of the eighth resistor and one end of the ninth resistor are both connected to the base of the third transistor, the other end of the ninth resistor and the emitter of the third transistor are both connected to the common ground terminal, and the collector of the third transistor is connected to the first signal processing unit.

[0024] Further, specifically, the MOS tube is a P-type MOS tube.

[0025] A rear combination lamp comprises the rear combination lamp power switching system as described above.

[0026] A vehicle is provided with the rear combination lamp as described above.

[0027] The beneficial effect of the present invention is that the power switching system for the rear combination lamp of the present invention realizes power switching by setting the first signal processing unit and the second signal processing unit. When there is power supply in any one of the brake lamp and the position lamp, the subsequent circuit can obtain power supply. When both circuits are powered, the first signal processing unit and the second signal processing unit can be combined to cut off the power supply line of the position lamp for the subsequent power supply, thereby realizing the high power supply priority of the brake lamp, avoiding the problem of two-way power shunting, avoiding false alarm of fault when the power supply of the rear combination lamp is powered on, and providing a good user experience. The circuit structure is simple and is realized by hardware circuit control, which reduces the implementation cost while meeting the functional requirements of the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0030] Figure 2 It is a detailed structural diagram of the first embodiment of the present invention.

[0031] Figure 3 It is a circuit diagram of the first embodiment of the present invention.

[0032] In the figure, 1 is a first power processing module; 2 is a second power processing module; 3 is a car light controller; 11 is a first power protection unit; 12 is a first signal processing unit; 13 is an output control unit; 14 is a first signal detection unit; 21 is a second power protection unit; 22 is a second signal processing unit; 23 is a second signal detection unit. DETAILED DESCRIPTION

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example 1

[0037] The present embodiment provides a rear combination lamp power switching system, such as Figure 1 As shown, it includes: a first power processing module 1, a second power processing module 2, and a vehicle light controller 3; the first power processing module 1 is connected to the second power processing module 2; the first power processing module 1 and the second power processing module 2 are both connected to the vehicle light controller 3. The first power processing module 1 includes: a first power protection unit 11, a first signal processing unit 12, an output control unit 13 and a first signal detection unit 14, the first power protection unit 11 is connected to the position light power supply line; the first signal processing unit 12 is connected to the first power protection unit 11; the first power protection unit 11 and the first signal processing unit 12 are both connected to the output control unit 13; the first signal detection unit 14 is connected to the position light power supply line. The second power processing module 2 includes: a second power protection unit 21, a second signal processing unit 22 and a second signal detection unit 23. The second power protection unit 21 is connected to the brake light power supply line; the second power protection unit 21 and the first signal processing unit 12 are both connected to the second signal processing unit 22; the second signal detection unit 23 is connected to the brake light power supply line; the first signal detection unit 14 and the second signal detection unit 23 have the same structure and are both connected to the vehicle light controller 3.

[0038] The position light and the brake light are powered by the vehicle body, wherein the first signal processing unit 12 and the second signal processing unit 22 are used for power switching. When power is available in either the brake light or the position light, the subsequent circuit can obtain power. When power is available in both circuits, the first signal processing unit 12 and the second signal processing unit 22 can be combined to cut off the position light power supply line for the subsequent circuit, thereby achieving a high power supply priority for the brake light, avoiding the problem of two-way power shunting, and avoiding false alarms when the rear combination light power supply is powered on, providing a good user experience.

[0039] The first signal detection unit 14 and the second signal detection unit 23 are used for the vehicle light controller 3 to output a control signal to light up the LED with the corresponding function based on the corresponding power signal.

[0040] For example, the first signal detection unit 14 and the second signal detection unit 23 both include: a first diode D3, D6, a first resistor R2, R5, a second resistor R3, R6, a third resistor R1, R4, a first capacitor C1, C2 and a first transistor Q3, Q5; the anode of the first diode D3, D6 is the signal input end of the first signal detection unit 14 or the second signal detection unit 23, the cathode of the first diode D3, D6 is connected to one end of the first resistor R2, R5), the second resistor R3, R6 and the first capacitor C1, C2 are connected in parallel, one end after the parallel connection and the base of the first transistor Q3, Q5 are connected to the other end of the first resistor R2, R5, the other end after the parallel connection and the emitter of the first transistor Q3, Q5 are connected to the common ground end, one end of the third resistor R1, R4 is connected to the 5V power supply end, and the other end is connected to the collector of the first transistor Q3, Q5, and the collector of the first transistor Q3, Q5 is also connected to the car light controller 3.

[0041] For example, the first power protection unit 11 includes a first transient suppression diode T1, a second capacitor C3, a third capacitor C4 and a second diode D1; the first transient suppression diode T1 is connected to the position light power supply line, the first transient suppression diode T1, the second capacitor C3 and the third capacitor C4 are connected in parallel, one end of the connection is connected to the anode of the second diode D1, and the other end is connected to the common ground; the cathode of the second diode D1 is the output end of the first power protection unit 11.

[0042] For example, the first signal processing unit 12 includes a fourth resistor PR3, a fifth resistor PR4 and a second transistor Q2; one end of the fourth resistor PR3 is connected to the output end of the first power protection unit 11, the other end of the fourth resistor PR3 and one end of the fifth resistor PR4 are both connected to the base of the second transistor Q2, the other end of the fifth resistor PR4 and the emitter of the second transistor Q2 are both connected to the common ground, and the collector of the second transistor Q2 is connected to the output control unit 13.

[0043] For example, the output control unit 13 includes a voltage regulator tube D2, a sixth resistor PR1, a seventh resistor PR2 and a MOS tube Q1; the cathode of the voltage regulator tube D2, one end of the sixth resistor PR1 and the source of the MOS tube Q1 are all connected to the output end of the first power protection unit 11, the anode of the voltage regulator tube D2, the other end of the sixth resistor PR1 and one end of the seventh resistor PR2 are all connected to the gate of the MOS tube, the other end of the seventh resistor PR2 is connected to the collector of the second triode Q2, and the drain of the MOS tube Q1 is the output end of the output control unit 13. Among them, the MOS tube Q1 is a P-type MOS tube.

[0044] For example, the second power protection unit 21 includes a second transient suppression diode T2, a fourth capacitor C5, a fifth capacitor C6, a third diode D4 and a fourth diode D5; the anodes of the second transient suppression diode T2 and the third diode D4 are both connected to the brake light power supply line, the cathode of the third diode D4 is connected to the second signal processing unit 22, the second transient suppression diode T2, the fourth capacitor C5 and the fifth capacitor C6 are connected in parallel, one end of the parallel connection is connected to the anode of the fourth diode D5, the other end of the parallel connection is connected to the common ground, and the cathode of the fourth diode D5 is connected to the collector of the second transistor D4.

[0045] For example, the second signal processing unit 22 includes: an eighth resistor PR5, a ninth resistor PR6 and a third triode Q4; one end of the eighth resistor PR5 is connected to the cathode of the third diode D4, the other end of the eighth resistor PR5 and one end of the ninth resistor PR6 are both connected to the base of the third triode Q4, the other end of the ninth resistor PR6 and the emitter of the third triode Q4 are both connected to the common ground, and the collector of the third triode Q4 is connected to the first signal processing unit 12.

[0046] In actual application, the circuit principle is as follows: when the position lamp A is powered alone, the power supply is surge suppressed by the first transient suppression diode T1, filtered by the second capacitor C3 and the third capacitor C4, and divided into two paths after being protected by the second diode D1. One path is divided by the fourth resistor PR3 and the fifth resistor PR4 of the first signal processing unit 12, and the second transistor Q2 is turned on, and the MOS tube Q1 is turned on; after the MOS tube Q1 is turned on, the power signal A+ output by the first power protection unit 11 is output through the MOS tube Q1 to supply power to the subsequent circuit. The first signal detection unit 14 is connected to the vehicle light controller 3. When there is a power supply signal on the position lamp power supply line, the first diode D3 is protected against reverse, and the first transistor Q3 is turned on. The output signal of the first signal detection unit 14 changes from 5V to 0V. After the vehicle light controller 3 is powered on and receives this level change, a corresponding position lamp control signal is generated to light up the corresponding LED of the position lamp. At this time, the vehicle light controller 3 detects that the current on the position lamp power supply line is the working current of the position lamp.

[0047] When the brake light B is powered alone, the power supply is surge suppressed by the second transient suppression diode T2. The fourth capacitor C5 and the fifth capacitor C6 are directly output by the output control unit 13 after being reverse-protected by the fourth diode D5, and are used to power the subsequent circuit. The second signal detection unit 23 is connected to the vehicle light controller 3. When there is a power supply signal on the brake light power supply line, the first diode D6 is reverse-protected, and the first transistor Q5 is turned on. The output signal of the second signal detection unit 23 changes from 5V to 0V. After the vehicle light controller 3 is powered on and receives this level change, a corresponding brake light control signal is generated to light up the corresponding LED of the brake light. At this time, the vehicle light controller 3 detects that the current on the brake light power supply line is the working current of the position light.

[0048] When the position light and the brake light are powered at the same time, the brake light power supply line passes through the second transistor D4 for reverse protection, and then the third transistor Q4 is turned on by the eighth resistor PR5 and the ninth resistor PR6. At this time, the power signal A+ output by the first power protection unit 11 passes through the fourth resistor PR3 and then grounded through the third transistor Q4. Then, the base of the second transistor Q2 has no voltage input and cannot be turned on, and then the MOS tube Q1 cannot be turned on. The power signal A+ output by the first power protection unit 11 is cut off from the path of the output control unit 13, and is only powered by the brake light power supply line. After the vehicle light controller 3 is powered on, the brake / position light signal is detected at the same time, and the corresponding LED of the brake light is lit according to the brake light priority principle.

[0049] Since the current on the position light power supply line does not power the internal LED, the vehicle light controller 3 detects that there is basically no current on the position light power supply line, and the brake light power supply line is the normal working current of the brake light, thereby ensuring that the function is normal when the power supply is switched, the vehicle body light control will not falsely report a fault, and the user experience is good.

[0050] Example 2

[0051] A rear combination lamp comprises the above rear combination lamp power switching system.

[0052] Example 3

[0053] A car is provided with the above rear combination lamp.

[0054] In summary, the rear combination lamp power switching system of the present invention realizes power switching by setting the first signal processing unit 12 and the second signal processing unit 22. When there is power supply in any one of the brake lamp and the position lamp, the subsequent circuit can obtain power supply. When both circuits are powered, the first signal processing unit 12 and the second signal processing unit 22 can be combined to cut off the position lamp power supply line for the subsequent power supply, thereby realizing the high power supply priority of the brake lamp, and avoiding the problem of two-way power shunting, avoiding false alarms when the rear combination lamp power supply is powered on, and providing a good user experience. The circuit structure is simple and is implemented through hardware circuit control, which reduces the implementation cost while meeting the functional requirements of the lamp.

[0055] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rear combination lamp power switching system, characterized in that: include: A first power processing module (1), a second power processing module (2), and a vehicle light controller (3); The first power processing module (1) is connected to the second power processing module (2); The first power processing module (1) and the second power processing module (2) are both connected to the vehicle light controller (3); The first power processing module (1) comprises: A first power supply protection unit (11), connected to a position light power supply line; A first signal processing unit (12) connected to the first power protection unit (11); An output control unit (13), the first power protection unit (11) and the first signal processing unit (12) are both connected to the output control unit (13); A first signal detection unit (14) connected to the position light power supply line The second power processing module (2) comprises: A second power supply protection unit (21) connected to a brake light power supply line; A second signal processing unit (22), the second power protection unit (21) and the first signal processing unit (12) are both connected to the second signal processing unit (22); A second signal detection unit (23), connected to the brake light power supply line; The first signal detection unit (14) and the second signal detection unit (23) have the same structure and are both connected to the vehicle light controller (3).

2. The rear combination lamp power switching system according to claim 1, characterized in that: The first signal detection unit (14) and the second signal detection unit (23) both include: a first diode, a first resistor, a second resistor, a third resistor, a first capacitor and a first transistor; The anode of the first diode is the signal input terminal of the first signal detection unit (14) or the second signal detection unit (23), the cathode of the first diode is connected to one end of the first resistor, the second resistor and the first capacitor are connected in parallel, one end after the parallel connection and the base of the first transistor are both connected to the other end of the first resistor, the other end after the parallel connection and the emitter of the first transistor are both connected to a common ground terminal, one end of the third resistor is connected to a 5V power supply terminal, and the other end is connected to the collector of the first transistor, and the collector of the first transistor is also connected to a vehicle light controller (3).

3. The rear combination lamp power switching system according to claim 2, characterized in that: The first power supply protection unit (11) comprises a first transient suppression diode, a second capacitor, a third capacitor and a second diode; the first transient suppression diode is connected to the position light power supply line, the first transient suppression diode, the second capacitor and the third capacitor are connected in parallel, one end of the connected diode is connected to the anode of the second diode, and the other end is connected to the common ground; the cathode of the second diode is the output end of the first power supply protection unit (11).

4. The rear combination lamp power switching system as claimed in claim 3, characterized in that: The first signal processing unit (12) comprises a fourth resistor, a fifth resistor and a second triode; One end of the fourth resistor is connected to the output end of the first power protection unit (11), the other end of the fourth resistor and one end of the fifth resistor are both connected to the base of the second transistor, the other end of the fifth resistor and the emitter of the second transistor are both connected to the common ground, and the collector of the second transistor is connected to the output control unit (13).

5. The rear combination lamp power switching system as claimed in claim 4, characterized in that: The output control unit (13) comprises a voltage regulator tube, a sixth resistor, a seventh resistor and a MOS tube; The cathode of the voltage regulator tube, one end of the sixth resistor and the source of the MOS tube are all connected to the output end of the first power protection unit (11); the anode of the voltage regulator tube, the other end of the sixth resistor and one end of the seventh resistor are all connected to the gate of the MOS tube; the other end of the seventh resistor is connected to the collector of the second transistor; and the drain of the MOS tube is the output end of the output control unit (13).

6. The rear combination lamp power switching system according to claim 5, characterized in that: The second power protection unit (21) comprises a second transient suppression diode, a fourth capacitor, a fifth capacitor, a third diode and a fourth diode; The anodes of the second transient suppression diode and the third diode are both connected to the brake light power supply line, the cathode of the third diode is connected to the second signal processing unit (22), the second transient suppression diode, the fourth capacitor and the fifth capacitor are connected in parallel, one end of the parallel connection is connected to the anode of the fourth diode, the other end of the parallel connection is connected to the common ground, and the cathode of the fourth diode is connected to the collector of the second transistor.

7. The rear combination lamp power switching system according to claim 6, characterized in that: The second signal processing unit (22) comprises: an eighth resistor, a ninth resistor and a third triode; One end of the eighth resistor is connected to the cathode of the third diode, the other end of the eighth resistor and one end of the ninth resistor are both connected to the base of the third transistor, the other end of the ninth resistor and the emitter of the third transistor are both connected to the common ground, and the collector of the third transistor is connected to the first signal processing unit (12).

8. The rear combination lamp power switching system as claimed in claim 5, characterized in that: The MOS tube is a P-type MOS tube.

9. A rear combination lamp, characterized in that: The rear combination lamp comprises the rear combination lamp power switching system according to any one of claims 1 to 8.

10. An automobile, characterized in that: The vehicle is equipped with the rear combination lamp as claimed in claim 9.

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