Driving circuit of vehicle lamp and vehicle

Abstract

The utility model provides a vehicle lamp driving circuit and a vehicle. The driving circuit comprises a driving power supply circuit, a resistance circuit, a first switching circuit and a second switching circuit, the driving power supply circuit is connected with the resistance circuit and the first switching circuit; the resistance circuit is connected with the first switching circuit and the second switching circuit; the driving power supply circuit is used for controlling the resistance circuit to work at a first resistance value according to the first control signal so as to switch on the second switching circuit, and controlling the first switching circuit to switch on according to the second control signal, so that the power supply voltage drives the second illuminator to emit light after passing through the resistance circuit and the second switching circuit; the power supply voltage is grounded after passing through the resistance circuit and the first switching circuit; the driving power supply circuit is also used for controlling the resistance circuit to work at a second resistance value according to the third control signal so as to disconnect the second switching circuit and controlling the first switching circuit to disconnect according to the fourth control signal, so that the power supply voltage drives the first illuminator to illuminate after passing through the resistance circuit; the first resistance is smaller than the second resistance.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a driving circuit for a vehicle lamp and a vehicle. Background Art

[0002] Car headlights are widely used. Because car headlights are not only reflected in the information exchange between cars, but also an essential element for safe driving when the light is poor. Therefore, the lighting drive circuit of car headlights is extremely important. Utility Model Content

[0003] The present application provides a driving circuit for a vehicle lamp and a vehicle, which can reduce the power consumption of a first light emitter.

[0004] In a first aspect, an embodiment of the present application provides a driving circuit for a vehicle lamp, the driving circuit comprising: a driving power supply circuit, a resistor circuit, a first switch circuit, and a second switch circuit; wherein the driving power supply circuit is connected to the resistor circuit and the first switch circuit; the resistor circuit is connected to the first switch circuit and the second switch circuit; the first switch circuit is used to connect to a first light emitter; the second switch circuit is used to connect to a second light emitter; the driving power supply circuit is used to control the resistor circuit to operate at a first resistance value according to a first control signal to turn on the second switch circuit, and to control the first switch circuit to turn on according to a second control signal, so that the power supply voltage drives the second light emitter to emit light after passing through the resistor circuit and the second switch circuit, and the power supply voltage is connected to ground after passing through the resistor circuit and the first switch circuit; the driving power supply circuit is also used to control the resistor circuit to operate at a second resistance value according to a third control signal to disconnect the second switch circuit, and to control the first switch circuit to disconnect according to a fourth control signal, so that the power supply voltage drives the first light emitter to emit light after passing through the resistor circuit; wherein the first resistance value is less than the second resistance value.

[0005] It can be understood that in the embodiment of the present application, since the resistance value of the resistor circuit through which the power supply voltage passes is different when driving the first light emitter and driving the second light emitter to emit light, that is, when driving the first light emitter to emit light, the resistance value of the resistor circuit through which the power supply voltage passes is greater than the resistance value of the resistor circuit through which the power supply voltage passes when driving the second light emitter to emit light; therefore, the voltage and current consumed when the second light emitter emits light are greater than the voltage and current consumed when the first light emitter emits light. In this way, while achieving the switching between the first light emitter and the second light emitter to emit light, it is beneficial to reduce the power consumption of the first light emitter when it emits light, making the first light emitter more energy-efficient when it emits light.

[0006] In some embodiments, the second switching circuit includes a first transistor and a first resistor; wherein the first end of the first transistor is connected to the first end of the resistor circuit and the first end of the first resistor, the second end of the first transistor is used to connect to the second light emitter, and the third end of the first transistor is connected to the second end of the first resistor; the second end of the first resistor is connected to the first switching circuit; and the second end of the first resistor is used to connect to the first light emitter.

[0007] It can be understood that in the embodiment of the present application, the second switching circuit is composed of the first transistor and the first resistor, and the first resistor is used to make the voltage of the second electrode of the first transistor lower than the voltage of the first electrode of the first transistor when the resistor circuit operates at the first resistance value, thereby turning on the first transistor; in this way, the driving power supply circuit can control the resistor circuit to operate at the first resistance value according to the first control signal to turn on the second switching circuit, or control the resistor circuit to operate at the second resistance value according to the third control signal to disconnect the second switching circuit, that is, to realize automatic control of the second switching circuit, and then realize automatic driving of the second light-emitting device to emit light.

[0008] In some embodiments, the first transistor is a field effect transistor, the first terminal of the first transistor is a source, the second terminal of the first transistor is a drain, and the third terminal of the first transistor is a gate.

[0009] It can be understood that in the embodiment of the present application, the first transistor is a field effect transistor, the first end of the first transistor is the source, the second end is the drain, and the third end is the gate, and the drain is used to connect to the second light emitting device. In this way, when the driving power supply circuit controls the resistance circuit to operate at the first resistance value to turn on the second switching circuit according to the first control signal, the power supply voltage can reach the second light emitting device after passing through the resistance circuit and the source and drain of the field effect transistor, thereby driving the second light emitting device to emit light.

[0010] In some embodiments, the second switching circuit also includes a second resistor; wherein the first end of the second resistor is connected to the second end of the first resistor and the gate of the first transistor, and the second end of the second resistor is connected to the first switching circuit; the second end of the second resistor is used to connect to the first light emitter.

[0011] It can be understood that in the embodiment of the present application, the second switching circuit also includes a second resistor, which can reduce the voltage of the gate of the first transistor and reduce the current of the gate, thereby suppressing the oscillation of the second switching circuit, so that the first transistor operates in a stable state, thereby achieving stable driving of the first light emitter to emit light.

[0012] In some embodiments, the first switching circuit includes a second transistor, a third resistor, and a fourth resistor; wherein the first end of the third resistor is connected to the driving power circuit, and the first end of the third resistor is used to receive the second control signal or the fourth control signal; the second end of the third resistor is connected to the first electrode of the second transistor and the first end of the fourth resistor; the second end of the fourth resistor is connected to the second electrode of the second transistor, and the third electrode of the second transistor is connected to the second end of the second resistor; the third electrode of the second transistor is used to be connected to the first light emitter.

[0013] It can be understood that in the embodiment of the present application, the first switching circuit includes a second transistor, a third resistor, and a fourth resistor; wherein the third resistor is used to reduce the current input to the second transistor so that the second transistor is not turned on when the second control signal or the fourth control signal is not received, and the second transistor is not burned when the second control signal or the fourth control signal is received; the fourth resistor is used to reduce the voltage of the second electrode of the second transistor so that the second transistor operates in a stable state when the second control signal or the fourth control signal is received; in this way, the driving power supply circuit can control the first switching circuit to be turned on according to the second control signal, or control the first switching circuit to be turned off according to the fourth control signal, that is, to realize automatic control of the first switching circuit, and then realize automatic driving of the first light emitter to emit light.

[0014] In some embodiments, the second transistor is a triode, the first electrode of the second transistor is a base, the second electrode of the second transistor is an emitter, and the third electrode of the second transistor is a collector.

[0015] It can be understood that in the embodiment of the present application, the first electrode of the second transistor is the base, the second electrode of the second transistor is the emitter, and the third electrode of the second transistor is the collector. In this way, on the one hand, when the driving power supply circuit controls the resistor circuit to operate at the first resistance value to turn on the second switch circuit according to the first control signal, and controls the first switch circuit to be turned on according to the second control signal, the power supply voltage can be grounded after passing through the resistor circuit and the collector and emitter of the transistor, instead of lighting up the first light emitter, that is, only the second light emitter is lit when the second light emitter is driven to light up; on the other hand, when the driving power supply circuit controls the resistor circuit to operate at the second resistance value to disconnect the second switch circuit according to the third control signal, and controls the first switch circuit to be disconnected according to the fourth control signal, the power supply voltage can drive the first light emitter to emit light after passing through the resistor circuit; thereby realizing the switching of the first light emitter and the second light emitter to emit light.

[0016] In some embodiments, the resistance circuit includes a variable resistor, a first pin of the variable resistor is used to receive a power supply voltage, a second pin of the variable resistor is used to receive the first control signal or the third control signal, and a third pin of the variable resistor is connected to a first end of the first resistor and a first end of the first transistor.

[0017] It can be understood that in the embodiment of the present application, the resistance circuit includes a variable resistor, that is, the driving power supply circuit controls the variable resistor to operate at a first resistance value to turn on the second switch circuit according to a first control signal, or controls the variable resistor to operate at a second resistance value to disconnect the second switch circuit according to a third control signal. This is beneficial to saving design costs.

[0018] In some embodiments, the driving power circuit is also used to provide a power supply voltage for the resistance circuit.

[0019] It can be understood that in the embodiment of the present application, a driving power supply circuit is used to provide a power supply voltage for the resistance circuit, rather than other additional modules providing a power supply voltage for the resistance circuit. This is beneficial to saving the design cost and hardware cost of the driving circuit.

[0020] In a second aspect, an embodiment of the present application provides a vehicle, comprising the driving circuit, a first light emitter and a second light emitter as described in the first aspect; wherein the first light emitter is connected to the first switching circuit, and the second light emitter is connected to the second switching circuit.

[0021] It can be understood that in the embodiment of the present application, the vehicle includes the driving circuit, the first light emitter and the second light emitter described in the first aspect. This is beneficial for the vehicle to switch the first light emitter and the second light emitter to emit light while reducing the energy consumption of the first light emitter, making the first light emitter more energy-efficient when emitting light.

[0022] In some embodiments, the first light emitter is a low beam lamp, and the second light emitter is a high beam lamp; wherein the anode of the low beam lamp is connected to the first end of the first switching circuit, and the cathode of the low beam lamp is grounded; wherein the anode of the high beam lamp is connected to the first end of the second switching circuit, and the cathode of the high beam lamp is grounded.

[0023] It can be understood that in the embodiment of the present application, since the first light emitter is a low beam and the second light emitter is a high beam, this is beneficial to achieving the switching between high and low beams while reducing the energy consumption of the low beam, making the low beam more energy-efficient when emitting light. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 1 ;

[0025] Figure 2 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 2 ;

[0026] Figure 3 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 3 ;

[0027] Figure 4 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 4 ;

[0028] Figure 5 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 5 ;

[0029] Figure 6 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 6 ;

[0030] Figure 7 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 7 ;

[0031] Figure 8 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 8 ;

[0032] Fig. 9 A schematic diagram of a driving circuit for a vehicle lamp provided in an embodiment of the present application Figure 9 ;

[0033] Fig.10 A schematic diagram of a current path when a second light emitter emits light provided in an embodiment of the present application Figure 1 ;

[0034] Fig.11 A schematic diagram of a current path when a second light emitter emits light provided in an embodiment of the present application Figure 2 ;

[0035] Fig.12 A schematic diagram of a current path when a first light emitter emits light provided in an embodiment of the present application Figure 3 ;

[0036] Fig.13 A schematic diagram of a vehicle structure provided in an embodiment of the present application Figure 1 ;

[0037] Fig.14 A schematic diagram of a vehicle structure provided in an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0040] In the following description, reference is made to “some embodiments\other embodiments”, which describe a subset of all possible embodiments, but it can be understood that “some embodiments\other embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0041] In the following description, the terms "first\second" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0043] Currently, most of the application design solutions on the market are relatively complex, with many components, high costs, and no special design for low power consumption.

[0044] In a related technology, a high and low beam driving circuit of a vehicle headlamp is provided, and the driving circuit includes resistors R1, R2, R3, R4, R5, and R6, diodes D1, D2, D3, D4, and D5, high beam light emitting tubes HD1-HDn, low beam light emitting tubes LD1-LDn, a DC-DC driving control module, field effect tubes Q1, Q2, Q3, and Q4, and a power supply VCC. However, in this technology, a complex circuit with multiple electronic devices or components is used to complete the switching of high and low beams; and in this driving circuit, the power supply voltage does not change with the switching of high and low beams, but only changes the magnitude of the current, so lower energy consumption cannot be achieved.

[0045] In view of the above technical design deficiencies, the present application embodiment provides a driving circuit for a vehicle lamp, such as Figure 1As shown, the driving circuit 10 includes: a driving power circuit 101, a resistor circuit 102, a first switch circuit 103 and a second switch circuit 104; wherein the driving power circuit 101 is connected to the resistor circuit 102 and the first switch circuit 103; the resistor circuit 102 is connected to the first switch circuit 103 and the second switch circuit 104; the first switch circuit 103 is used to connect to the first light emitter; the second switch circuit 104 is used to connect to the second light emitter;

[0046] The driving power supply circuit 101 is used to control the resistor circuit 102 to operate at a first resistance value according to a first control signal to turn on the second switch circuit 104, and to control the first switch circuit 103 to turn on according to a second control signal, so that the power supply voltage drives the second light emitter to emit light after passing through the resistor circuit 102 and the second switch circuit 104, and the power supply voltage is grounded after passing through the resistor circuit 102 and the first switch circuit 103;

[0047] The driving power supply circuit 101 is further used to control the resistance circuit 102 to operate at the second resistance value according to the third control signal to disconnect the second switch circuit 104, and to control the first switch circuit 103 to be disconnected according to the fourth control signal, so that the power supply voltage drives the first light emitter to emit light after passing through the resistance circuit 102;

[0048] Wherein, the first resistance value is smaller than the second resistance value.

[0049] It can be understood that in the embodiment of the present application, since the resistance value of the resistor circuit 102 through which the power supply voltage passes is different when driving the first light emitter and driving the second light emitter to emit light, that is, when driving the first light emitter to emit light, the resistance value of the resistor circuit 102 through which the power supply voltage passes is greater than the resistance value of the resistor circuit 102 through which the power supply voltage passes when driving the second light emitter to emit light; therefore, the voltage and current consumed when the second light emitter emits light are greater than the voltage and current consumed when the first light emitter emits light. In this way, while achieving the switching between the first light emitter and the second light emitter to emit light, it is beneficial to reduce the power consumption of the first light emitter when emitting light, so that the first light emitter is more energy-efficient when emitting light.

[0050] In the embodiment of the present application, the first resistance value and the second resistance value are not limited, and the difference between the second resistance value and the first resistance value is not limited either, the first resistance value is smaller than the second resistance value; and when the resistance value of the resistor circuit 102 is the first resistance value, the power supply voltage can pass through the second switch circuit 104; when the resistance value of the resistor circuit 102 is the second resistance value, the power supply voltage cannot pass through the second switch circuit 104. The first resistance value and the second resistance value are determined by the voltage thresholds at which the power supply voltage and the second switch circuit 104 are turned on and off.

[0051] It should be noted that in the embodiment of the present application, the driving power circuit 101 is not limited, and the driving power circuit 101 can be a chip or an integrated circuit. In the embodiment of the present application, the resistance circuit 102 is not limited, and the resistance circuit 102 can be an integrated circuit or a single device. When the resistance circuit 102 is an integrated circuit, the number of resistors, triodes and / or field effect transistors included in the resistance circuit 102 and the connection relationship are not limited. In the implementation of the present application, the first switch circuit 103 and the second switch circuit 104 are not limited, and the number of resistors, triodes and / or field effect transistors included in the first switch circuit 103 and the second switch circuit 104 and the connection relationship are not limited.

[0052] For example, in some embodiments, Figure 2 As shown, the second switch circuit 104 includes a first transistor 201 and a first resistor 202; wherein the first end of the first transistor 201 is connected to the first end of the resistor circuit 102 and the first end of the first resistor 202, the second end of the first transistor 201 is used to connect to the second light emitter, and the third end of the first transistor 201 is connected to the second end of the first resistor 202; the second end of the first resistor 202 is connected to the first switch circuit 103; the second end of the first resistor 202 is used to connect to the first light emitter.

[0053] In the embodiment of the present application, the first transistor 201 is not limited, and the first transistor 201 may be a field effect transistor or a triode; wherein, when the first transistor 201 is a triode, the triode is a high current triode.

[0054] It can be understood that in the embodiment of the present application, the second switch circuit 104 is composed of a first transistor 201 and a first resistor 202. The first resistor 202 is used to make the voltage of the second electrode of the first transistor 201 lower than the voltage of the first electrode of the first transistor 201 when the resistor circuit 102 operates at the first resistance value, thereby turning on the first transistor 201; in this way, the driving power supply circuit 101 can control the resistor circuit 102 to operate at the first resistance value according to the first control signal to turn on the second switch circuit 104, or control the resistor circuit 102 to operate at the second resistance value according to the third control signal to disconnect the second switch circuit 104, that is, Automatic control of the second switch circuit 104 is achieved, and then the second light emitter is automatically driven to emit light; illustratively, in some embodiments, if the first transistor 201 is a positive (Positive, P) field effect transistor, then the first electrode of the first transistor 201 is the source, and the second electrode is the gate; in other embodiments, if the first transistor 201 is a positive-negative-positive (Positive-Negative-Positive, PNP) type triode, then the first electrode of the first transistor 201 is the emitter, and the second electrode of the first transistor 201 is the base.

[0055] For example, in some embodiments, Figure 3 As shown, the first transistor 201 is a field effect transistor 301, the first end of the first transistor 201 is a source electrode (Source electrode, S), the second end of the first transistor 201 is a drain electrode (Draine electrode, D), and the third end of the first transistor is a gate electrode (Grid electrode, G).

[0056] It can be understood that in the embodiment of the present application, the first transistor 201 is a field effect transistor 301, the first end of the first transistor 201 is a source, the second end is a drain, and the third end is a gate, and the drain is used to connect to the second light-emitting device. In this way, when the driving power supply circuit 101 controls the resistor circuit 102 to operate at the first resistance value according to the first control signal to turn on the second switch circuit 104, the power supply voltage can reach the second light-emitting device through the resistor circuit 102 and the source and drain of the field effect transistor 301, thereby driving the second light-emitting device to emit light.

[0057] In some embodiments, Figure 4 As shown, the second switch circuit 104 also includes a second resistor 401; wherein the first end of the second resistor 401 is connected to the second end of the first resistor 202 and the gate of the first transistor 201, and the second end of the second resistor 401 is connected to the first switch circuit 103; the second end of the second resistor 401 is used to connect to the first light emitter.

[0058] It can be understood that in the embodiment of the present application, the second switching circuit 104 also includes a second resistor 401, and the second resistor 401 can reduce the voltage of the gate of the first transistor 201, and reduce the gate current, thereby suppressing the oscillation of the second switching circuit, so that the first transistor 201 operates in a stable state, thereby achieving stable driving of the first light emitter to emit light.

[0059] In some embodiments, Figure 5 As shown, the first switch circuit 103 includes a second transistor 501, a third resistor 502, and a fourth resistor 503; wherein, the first end of the third resistor 502 is connected to the driving power supply circuit 101, and the first end of the third resistor 502 is used to receive the second control signal or the fourth control signal; the second end of the third resistor 502 is connected to the first electrode of the second transistor 501 and the first end of the fourth resistor 503; the second end of the fourth resistor 503 is connected to the second electrode of the second transistor 501, and the third electrode of the second transistor 501 is connected to the second end of the second resistor 401; the third electrode of the second transistor 501 is used to be connected to the first light emitter.

[0060] It can be understood that in the embodiment of the present application, the first switch circuit 103 includes a second transistor 501, a third resistor 502, and a fourth resistor 503; wherein the third resistor 502 is used to reduce the current input to the second transistor 501, so that the second transistor 501 is not turned on when the second control signal or the fourth control signal is not received, and so that the second transistor 501 is not burned when the second control signal or the fourth control signal is received; the fourth resistor 503 is used to reduce the voltage of the second pole of the second transistor 501, so that the second transistor 501 operates in a stable state when the second control signal or the fourth control signal is received; in this way, the driving power supply circuit 101 can control the first switch circuit 103 to be turned on according to the second control signal, or control the first switch circuit 103 to be turned off according to the fourth control signal, that is, to realize the automatic control of the first switch circuit 103, and then realize the automatic driving of the first light emitter to emit light.

[0061] For example, in some embodiments, Figure 6 As shown, the second transistor 501 is a triode 601, the first electrode of the second transistor 501 is a base, the second electrode of the second transistor 501 is an emitter, and the third electrode of the second transistor 501 is a collector.

[0062] It can be understood that in the embodiment of the present application, the first electrode of the second transistor 501 is the base, the second electrode of the second transistor 501 is the emitter, and the third electrode of the second transistor 501 is the collector. In this way, on the one hand, when the driving power supply circuit 101 controls the resistor circuit 102 to operate at the first resistance value to turn on the second switch circuit 104 according to the first control signal, and controls the first switch circuit 103 to be turned on according to the second control signal, the power supply voltage can be connected to the ground after passing through the resistor circuit 102 and the collector and emitter of the transistor 601, instead of lighting up the first light emitter, that is, only the second light emitter is lit when the second light emitter is driven to light up; on the other hand, when the driving power supply circuit 101 controls the resistor circuit 102 to operate at the second resistance value to disconnect the second switch circuit 104 according to the third control signal, and controls the first switch circuit 103 to be disconnected according to the fourth control signal, the power supply voltage can drive the first light emitter to emit light after passing through the resistor circuit 102; thereby achieving switching between the first light emitter and the second light emitter to emit light.

[0063] In some other embodiments, the second transistor 501 is a triode, the first electrode of the second transistor 501 is a base, the second electrode of the second transistor 501 is a collector, and the third electrode of the second transistor 501 is an emitter.

[0064] In some embodiments, Figure 7 As shown, the resistance circuit 102 includes a variable resistor 701, a first pin of the variable resistor 701 is used to receive a power supply voltage, a second pin of the variable resistor 701 is used to receive the first control signal or the third control signal, and a third pin of the variable resistor 701 is connected to the first end of the first resistor 202 and the first end of the first transistor 201.

[0065] It can be understood that in the embodiment of the present application, the resistance circuit 102 includes a variable resistor 701, that is, the driving power supply circuit 101 controls the variable resistor 701 to operate at a first resistance value to turn on the second switch circuit 104 according to a first control signal, or controls the variable resistor 701 to operate at a second resistance value to disconnect the second switch circuit 104 according to a third control signal. This is beneficial to saving design costs.

[0066] In some embodiments, the driving power circuit 101 is also used to provide a power supply voltage for the resistance circuit 102 .

[0067] It can be understood that in the embodiment of the present application, the driving power circuit 101 is used to provide the power supply voltage for the resistance circuit 102, rather than other additional modules to provide the power supply voltage for the resistance circuit 102. This is beneficial to saving the design cost and hardware cost of the driving circuit 10.

[0068] In an embodiment of the present application, a driving circuit for a vehicle lamp is provided, such as Figure 8 As shown, the driving circuit 10 includes: a driving power circuit 101, a resistor circuit 102, a first switch circuit 103 and a second switch circuit 104; wherein the driving power circuit 101 is connected to the resistor circuit 102 and the first switch circuit 103; the resistor circuit 102 is connected to the first switch circuit 103 and the second switch circuit 104; the first switch circuit 103 is used to connect to the first light emitter; the second switch circuit 104 is used to connect to the second light emitter;

[0069] The driving power supply circuit 101 is used to control the resistor circuit 102 to operate at a first resistance value according to a first control signal to turn on the second switch circuit 104, and to control the first switch circuit 103 to turn on according to a second control signal, so that the power supply voltage drives the second light emitter to emit light after passing through the resistor circuit 102 and the second switch circuit 104, and the power supply voltage is grounded after passing through the resistor circuit 102 and the first switch circuit 103;

[0070] The driving power supply circuit 101 is further used to control the resistance circuit 102 to operate at the second resistance value according to the third control signal to disconnect the second switch circuit 104, and to control the first switch circuit 103 to be disconnected according to the fourth control signal, so that the power supply voltage drives the first light emitter to emit light after passing through the resistance circuit 102;

[0071] Wherein, the first resistance value is smaller than the second resistance value;

[0072] The second switch circuit 104 includes a first transistor 201 and a first resistor 202; wherein the first end of the first transistor 201 is connected to the first end of the resistor circuit 102 and the first end of the first resistor 202, the second end of the first transistor 201 is used to connect to the second light emitter, and the third end of the first transistor 201 is connected to the second end of the first resistor 202; the second end of the first resistor 202 is connected to the first switch circuit 103; and the second end of the first resistor 202 is used to connect to the first light emitter;

[0073] The first transistor 201 is a field effect transistor 301, the first end of the first transistor 201 is a source, the second end of the first transistor 201 is a drain, and the third end of the first transistor is a gate;

[0074] The second switch circuit 104 further includes a second resistor 401; wherein a first end of the second resistor 401 is connected to a second end of the first resistor 202 and a gate of the first transistor 201, and a second end of the second resistor 401 is connected to the first switch circuit 103; and a second end of the second resistor 401 is used to be connected to the first light emitter;

[0075] The first switch circuit 103 includes a second transistor 501, a third resistor 502, and a fourth resistor 503; wherein the first end of the third resistor 502 is connected to the driving power circuit 101, and the first end of the third resistor 502 is used to receive the second control signal or the fourth control signal; the second end of the third resistor 502 is connected to the first electrode of the second transistor 501 and the first end of the fourth resistor 503; the second end of the fourth resistor 503 is connected to the second electrode of the second transistor 501, and the third electrode of the second transistor 501 is connected to the second end of the second resistor 401; the third electrode of the second transistor 501 is used to be connected to the first light emitter;

[0076] The second transistor 501 is a triode 601, the first electrode of the second transistor 501 is a base electrode, the second electrode of the second transistor 501 is an emitter electrode, and the third electrode of the second transistor 501 is a collector electrode;

[0077] The resistance circuit 102 includes a variable resistor 701, a first pin of the variable resistor 701 is used to receive a power supply voltage, a second pin of the variable resistor 701 is used to receive the first control signal or the third control signal, and a third pin of the variable resistor 701 is connected to a first end of the first resistor 202 and a first end of the first transistor 201;

[0078] The driving power circuit 101 is also used to provide a power supply voltage for the resistance circuit 102 .

[0079] It can be understood that in the embodiment of the present application, since the resistance value of the resistor circuit 102 through which the power supply voltage passes is different when driving the first light emitter and driving the second light emitter to emit light, that is, when driving the first light emitter to emit light, the resistance value of the resistor circuit 102 through which the power supply voltage passes is greater than the resistance value of the resistor circuit 102 through which the power supply voltage passes when driving the second light emitter to emit light; therefore, the voltage and current consumed when the second light emitter emits light are greater than the voltage and current consumed when the first light emitter emits light. In this way, while achieving the switching between the first light emitter and the second light emitter to emit light, it is beneficial to reduce the power consumption of the first light emitter when emitting light, so that the first light emitter is more energy-efficient when emitting light.

[0080] The following describes an exemplary application of the embodiments of the present application in a practical application scenario.

[0081] In the related art, a complex circuit using a variety of electronic devices or components is used to complete the switching between high and low beams, and the power supply voltage provided to the light-emitting diode does not change with the switching between high and low beams, but only the magnitude of the current is changed, so lower energy consumption cannot be achieved.

[0082] In order to more clearly illustrate the features and advantages of the present application, the driving circuit of the vehicle light provided by the present application will be described in detail below with reference to the accompanying drawings.

[0083] In the embodiments of the present application, Fig. 9 As shown, the driving circuit 10 of the vehicle lamp includes: a driving power supply (i.e., a driving power supply circuit) 101, a variable resistor 701 (i.e., R1), a first resistor 202 (i.e., R2), a second resistor 401 (i.e., R3), a third resistor 502 (i.e., R4), a fourth resistor 503 (i.e., R5), a field effect transistor 301 (i.e., Q2), a digital triode 601 (i.e., Q1, also a triode), a high beam 901 (i.e., LED1) and a low beam 902 (i.e., LED2); wherein, a first end of the driving power supply 101 is connected to an input terminal A of the variable resistor 701, and the first end of the driving power supply 101 is used to output a voltage Vout; a second end of the driving power supply 101 is connected to a control terminal C of the variable resistor 701 to control the sliding of the sliding module P to realize dynamic adjustment of the effective resistance of the variable resistor 701, and a second end of the driving power supply 101 is used to output a first control signal or a third control signal; an output terminal D of the variable resistor 701 is connected to a first control terminal C of the variable resistor 701 to control the sliding of the sliding module P to realize dynamic adjustment of the effective resistance of the variable resistor 701, and a second end of the driving power supply 101 is used to output a first control signal or a third control signal; A first end of a resistor 202 is connected to an S pole of a field effect tube 301; a D pole of the field effect tube 301 is connected to an anode of a high beam lamp 901; a cathode of the high beam lamp 901 is grounded; a G pole of the field effect tube 301 is respectively connected to a second end of the first resistor 202 and a first end of a second resistor 401; a first end of the second resistor 401 is respectively connected to an output terminal 3 pole of a digital triode 601 and an anode of a low beam lamp 902; a cathode of the low beam lamp 902 is grounded; a third end of a driving power source 101 is connected to a first end of a third resistor 502, and the third end of the driving power source 101 is used to output a second control signal or a fourth control signal; a second end of the third resistor 502 is connected to an input terminal 1 pole of a digital triode 601; an input terminal 1 pole of the digital triode 601 is connected to a first end of a fourth resistor 503; an output terminal 3 pole of the digital triode 601 is connected to an anode of the low beam lamp 902; a second end of the fourth resistor 503 is connected to an output terminal 2 pole of the digital triode 601. Among them, the input terminal 1 of the digital triode 601 is the base, the output terminal 2 of the digital triode 601 is the emitter, and the output terminal 3 of the digital triode 601 is the collector; the high beam 901 is a high beam light emitting diode, and the low beam 902 is a low beam light emitting diode.

[0084] Among them, the 9-16V voltage signal provided by the car battery will be directly input to the driving power supply 101 as the power supply of the entire driving circuit 10; the high beam control input signal or the low beam control input signal is directly input to the driving power supply 101 as the control input signal for high and low beam switching; the effective resistance of the variable resistor 701 supports dynamic adjustment, and the high beam 901 and the low beam 902 are driven to emit light with different voltages and currents formed by high and low resistance states. And the first control signal and the third control signal output by the driving power supply 101 are pulse width modulation (PWM) signals, which control the sliding module P of the variable resistor 701, thereby realizing the high and low changes of the effective resistance of the variable resistor 701.

[0085] In the embodiment of the present application, the specific control logic of the driving circuit is as follows:

[0086] When the high beam control input signal is valid, the driving power supply 101 will output a first control signal with a lower duty cycle (marked as PWM1_L), so that the variable resistor 701 works in a low resistance state (the resistance value is recorded as R1_L); at the same time, the driving power supply 101 will output a second control signal of a high level, so that the digital transistor 601 is in a conducting state, and the current flows from the output terminal 3 of the digital transistor 601 to the input terminal 2, forming a short circuit effect. The level of the output terminal 3 is basically 0V, and the low beam 902 does not emit light; the first resistor 202 and the second resistor 401 form a voltage divider circuit to control the field effect tube 301 to be in a conducting state, and the current flows from the S pole of the field effect tube 301 to the D pole, driving the high beam 901 to emit light. Fig.10 As shown, when the high beam control input signal is valid, the current path 1 is: from the first end of the driving power supply 101 to the A pole, P pole, and D pole of the adjustable resistor 701 to the field effect transistor 301 and then to the high beam lamp 901. The working voltage at both ends of the high beam lamp 901 is recorded as V 远 , the working current is I 远 .like Fig.11 As shown, when the high beam control input signal is valid, the current path 2 is: from the first end of the driving power supply 101 to the A pole, P pole, and D pole of the adjustable resistor 701 to the first resistor 202 to the second resistor 401 to the digital transistor 601 and then to ground.

[0087] When the low beam control input signal is valid, the driving power supply 101 will output a third control signal with a higher duty cycle (marked as PWM1_H), so that the variable resistor 701 works in a high impedance state (the resistance value is recorded as R1_H); at the same time, the driving power supply 701 will output a fourth control signal of a low level, so that the digital triode 601 is in a disconnected state. At this time, the voltage divider circuit formed by the first resistor 202 and the second resistor 401 controls the field effect tube 301 to be in a non-conducting state. At this time, the low beam 902 emits light, and the high beam 901 does not emit light. Fig.12 As shown, when the low beam control input signal is valid, the current path 3 is: from the first end of the driving power supply 101 to the A pole, P pole, and D pole of the adjustable resistor 701 to the first resistor 202 to the second resistor 401 and then to the low beam lamp 902. The working voltage at both ends of the low beam lamp 902 is recorded as V 近 , the working current is I 近 .

[0088] In summary, in the current path 1, the equivalent resistance is only R1_L and the high beam 901; while in the current path 3, the equivalent resistance is R1_H, the first resistor 202, the second resistor 401 and the low beam 902. Obviously, the equivalent resistance of path 3 is greater than that of path 1. According to Ohm's law, when the voltage Vout output by the first end of the driving power supply 101 is the same, the larger the resistance, the smaller the current. That is to say, the current I 远 Greater than the current I when the low beam 902 is turned on 近 According to the voltage division principle, the voltage V acting on both ends of the lamp body when the high beam lamp 901 is working is 远 It is also greater than the voltage V acting on both ends of the lamp body when the low beam lamp 902 is working. 近 Therefore, in the embodiment of the present application, the energy consumption of the low beam lamp 902 when operating can be reduced by simultaneously reducing the operating current and the operating voltage of the low beam lamp 902, thereby being beneficial to saving the energy consumption of the low beam lamp 902 when emitting light.

[0089] In an embodiment of the present application, a very simple driving circuit 10 for a vehicle lamp is provided. The driving circuit 10 can save design costs to the maximum extent and reduce energy consumption requirements to the maximum extent while realizing the switching function between high and low beam lamps.

[0090] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not limitations on the implementation methods of the present application. For ordinary technicians in this field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present application are still within the scope of protection of the present application.

[0091] It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit is implemented in the form of a software functional unit.

[0092] It should be noted that, in the embodiments of the present application, the above can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present application can essentially or in other words, the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for configuring the device. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiments of the present application are not limited to any specific combination of hardware and software.

[0093] The embodiment of the present application provides a vehicle, Fig.13 A schematic diagram of a vehicle structure provided in an embodiment of the present application Figure 1 ,like Fig.13 As shown, the vehicle 130 includes a driving circuit 10 for a headlight, a first light emitter 1301 and a second light emitter 1302 ; wherein the first light emitter 1301 is connected to a first switch circuit 103 , and the second light emitter 1302 is connected to a second switch circuit 104 .

[0094] In some embodiments, Fig.14 As shown, the first light emitter 1301 is a low beam lamp 1401, and the second light emitter 1302 is a high beam lamp 1402; wherein, the anode of the low beam lamp 1401 is connected to the first end of the first switch circuit 103, and the cathode of the low beam lamp 1401 is grounded; the anode of the high beam lamp 1402 is connected to the first end of the second switch circuit 104, and the cathode of the high beam lamp 1402 is grounded.

[0095] In the embodiment of the present application, the low beam lamp 1401 and the high beam lamp 1402 may be light emitting diodes, organic light emitting diodes, halogen lamps, xenon lamps or laser lamps, etc.

[0096] It should be understood that the "one embodiment" or "an embodiment" or "some embodiments" or "in a possible implementation" or "example" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" or "in some embodiments" or "in a possible implementation" or "example" appearing throughout the specification may not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above description of the various embodiments tends to emphasize the differences between the various embodiments, and the same or similar aspects can be referenced to each other. For the sake of brevity, this article will not repeat them.

[0097] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0098] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0099] In the several embodiments provided in this application, it should be understood that the disclosed devices and apparatuses, etc., can be implemented in other ways. The embodiments described above are only exemplary. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0100] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0101] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A driving circuit for a vehicle lamp, characterized in that: The driving circuit comprises: a driving power circuit, a resistance circuit, a first switch circuit and a second switch circuit; wherein the driving power circuit is connected to the resistance circuit and the first switch circuit; the resistance circuit is connected to the first switch circuit and the second switch circuit; the first switch circuit is used to connect to the first light emitter; the second switch circuit is used to connect to the second light emitter; The driving power supply circuit is used to control the resistor circuit to operate at a first resistance value to turn on the second switch circuit according to a first control signal, and to control the first switch circuit to turn on according to a second control signal, so that the power supply voltage drives the second light emitter to emit light after passing through the resistor circuit and the second switch circuit, and the power supply voltage is grounded after passing through the resistor circuit and the first switch circuit; The driving power supply circuit is further used to control the resistance circuit to operate at a second resistance value according to a third control signal to disconnect the second switch circuit, and to control the first switch circuit to disconnect according to a fourth control signal, so that the power supply voltage drives the first light emitter to emit light after passing through the resistance circuit; Wherein, the first resistance value is smaller than the second resistance value.

2. The driving circuit according to claim 1, characterized in that: The second switching circuit includes a first transistor and a first resistor; wherein the first end of the first transistor is connected to the first end of the resistor circuit and the first end of the first resistor, the second end of the first transistor is used to connect to the second light emitter, and the third end of the first transistor is connected to the second end of the first resistor; the second end of the first resistor is connected to the first switching circuit; and the second end of the first resistor is used to connect to the first light emitter.

3. The driving circuit according to claim 2, characterized in that: The first transistor is a field effect transistor, the first end of the first transistor is a source, the second end of the first transistor is a drain, and the third end of the first transistor is a gate.

4. The driving circuit according to claim 3, characterized in that: The second switching circuit also includes a second resistor; wherein the first end of the second resistor is connected to the second end of the first resistor and the gate of the first transistor, and the second end of the second resistor is connected to the first switching circuit; the second end of the second resistor is used to connect to the first light emitter.

5. The driving circuit according to claim 4, characterized in that: The first switch circuit includes a second transistor, a third resistor, and a fourth resistor; wherein, The first end of the third resistor is connected to the driving power supply circuit, and the first end of the third resistor is used to receive the second control signal or the fourth control signal; the second end of the third resistor is connected to the first electrode of the second transistor and the first end of the fourth resistor; the second end of the fourth resistor is connected to the second electrode of the second transistor, and the third electrode of the second transistor is connected to the second end of the second resistor; the third electrode of the second transistor is used to be connected to the first light emitter.

6. The driving circuit according to claim 5, characterized in that: The second transistor is a triode, the first electrode of the second transistor is a base, the second electrode of the second transistor is an emitter, and the third electrode of the second transistor is a collector.

7. The driving circuit according to claim 2, characterized in that: The resistance circuit includes a variable resistor, a first pin of the variable resistor is used to receive a power supply voltage, a second pin of the variable resistor is used to receive the first control signal or the third control signal, and a third pin of the variable resistor is connected to a first end of the first resistor and a first end of the first transistor.

8. The driving circuit according to any one of claims 1 to 7, characterized in that: The driving power supply circuit is also used to provide a power supply voltage for the resistance circuit.

9. A vehicle, characterized in that: The vehicle comprises the driving circuit according to any one of claims 1 to 8, a first light emitter and a second light emitter; wherein the first light emitter is connected to the first switch circuit, and the second light emitter is connected to the second switch circuit.

10. The vehicle according to claim 9, characterized in that The first light emitter is a low beam lamp, and the second light emitter is a high beam lamp; wherein the anode of the low beam lamp is connected to the first end of the first switch circuit, and the cathode of the low beam lamp is grounded; the anode of the high beam lamp is connected to the first end of the second switch circuit, and the cathode of the high beam lamp is grounded.

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