Vehicle high beam and low beam light device and vehicle

Abstract

The application relates to the field of vehicle lighting, and discloses a vehicle high / low beam lamp device and a vehicle. The device comprises a radiator, a high / low beam controller arranged close to the radiator, and an LED lens module. The high / low beam controller comprises a power supply unit and a switching control unit. The power supply unit is configured to provide constant-voltage constant-current power supply to LED lamp beads in the LED lens module. The switching control unit is configured to switch on part of the LED lamp beads in the LED lens module based on a low beam input signal, and switch on at least part of the LED lamp beads in the LED lens module based on a high beam input signal. The number of the LED lamp beads switched on based on the high beam input signal is greater than the number of the LED lamp beads switched on based on the low beam input signal. Thus, by integrating the high / low beam controller and the LED lens module and arranging them close to the same radiator, the heat dissipation efficiency is optimized, and different numbers of LED lamp beads are accurately controlled to be switched on based on different input signals, so that accurate switching of the high / low beam is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle lighting, in particular to a vehicle high and low beam device and a vehicle. BACKGROUND

[0002] In modern automobile technology, the control of high and low beam is not only a key factor to ensure the safety of vehicle driving, but also an important link to improve the driving experience and road lighting efficiency. However, the control device and control method of vehicle high and low beam in the related art still have limitations, and the use performance of vehicle high and low beam needs to be further improved. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides a vehicle high and low beam device and a vehicle. The main technical solutions adopted by the present application include:

[0004] In a first aspect, the present application provides a vehicle high and low beam device, which comprises a heat sink, a high and low beam controller and an LED lens module, the high and low beam controller and the LED lens module being adjacent to and close to the heat sink; the high and low beam controller comprises a power supply unit and a switching control unit; the power supply unit is configured to provide constant voltage and constant current power supply to LED lamp beads in the LED lens module; the switching control unit is configured to switch on part of the LED lamp beads in the LED lens module based on a low beam input signal, and switch on at least part of the lamp beads in the LED lens module based on a high beam input signal; wherein the number of LED lamp beads turned on based on the high beam input signal is greater than the number of LED lamp beads turned on based on the low beam input signal.

[0005] In one embodiment, the switching control unit comprises a first LED switching circuit, a second LED switching circuit and a third LED switching circuit; wherein the first LED switching circuit and the second LED switching circuit switch on part of the LED lamp beads in the LED lens module based on the low beam input signal; the first LED switching circuit, the second LED switching circuit and the third LED switching circuit switch on at least part of the lamp beads in the LED lens module based on the high beam input signal.

[0006] In one of the embodiments, the first LED switching circuit comprises: a first input module, the first input module being adapted to receive a low beam input signal; a second input module, the second input module being adapted to receive a high beam input signal; a first switch tube, a control end of the first switch tube being connected with the first input module through a first resistor, a first end of the first switch tube being connected with a first switching end of the LED lens module, and a second end of the first switch tube being connected with a second switching end of the LED lens module; a first triode, a base of the first triode being connected with the second input module, an emitter of the first triode being grounded, and a collector of the first triode being connected with the control end of the first switch tube through the first resistor.

[0007] In one of the embodiments, the second LED switching circuit comprises: a third input module, the third input module being adapted to receive a low beam input signal; a fourth input module, the fourth input module being adapted to receive a high beam input signal; a second switch tube, a control end of the second switch tube being connected with the third input module through a second resistor, a first end of the second switch tube being connected with the second switching end of the LED lens module, and a second end of the second switch tube being grounded; a second triode, a base of the second triode being connected with the fourth input module, an emitter of the second triode being grounded, and a collector of the second triode being connected with the control end of the second switch tube through the second resistor.

[0008] In one of the embodiments, the third LED switching circuit comprises: a fifth input module, the fifth input module being adapted to receive a high beam input signal; a third switch tube, a control end of the third switch tube being connected with the fifth input module, and a first end of the third switch tube being grounded; a fourth switch tube, a first end of the fourth switch tube being connected with the first end of the first switch tube, a second end of the fourth switch tube being connected with a third switching end of the LED lens module, and a control end of the fourth switch tube being connected with a second end of the third switch tube; a first stabilizing tube, an anode of the first stabilizing tube being connected with the control end of the fourth switch tube, and a cathode of the first stabilizing tube being connected with the second end of the fourth switch tube; and a third resistor, the third resistor being connected with the first stabilizing tube in parallel.

[0009] In one of the embodiments, the LED lens module includes first to tenth LED lamp beads, wherein the first, fourth and seventh LED lamp beads are connected in series, the second, fifth and eighth LED lamp beads are connected in series, the third, sixth, tenth and ninth LED lamp beads are connected in series, the fourth and seventh LED lamp beads have a first node therebetween, the fifth and eighth LED lamp beads have a second node therebetween, the tenth and ninth LED lamp beads have a third node therebetween, the first, second and third nodes are connected together as a second switching end of the LED lens module, a node between the sixth and tenth LED lamp beads is a first switching end of the LED lens module, and a node between the third and sixth LED lamp beads is a third switching end of the LED lens module.

[0010] In one of the embodiments, the power supply unit includes: an input protection circuit adapted to perform surge protection and reverse connection protection on an input power supply of the high-low beam controller; an input filter circuit adapted to perform filter processing on the input power supply; a DC-DC conversion circuit adapted to convert the filter-processed input power supply to output a power supply; and an output filter circuit adapted to perform filter processing on the power supply to provide a constant voltage and constant current power supply.

[0011] In one of the embodiments, the DC-DC conversion circuit uses a DC-DC step-down chip to perform step-down conversion on the filter-processed input power supply.

[0012] In one of the embodiments, the input protection circuit includes: a transient voltage suppression tube having a first end adapted to be connected to the input power supply and a second end grounded; a first capacitor connected in parallel with the transient voltage suppression tube; a third resistor connected in parallel with the first capacitor; a fifth switch tube having a first end connected to the first end of the transient voltage suppression tube; a fourth resistor having a first end connected to a second end of the fifth switch tube; a fifth resistor having a first end connected to a second end of the fourth resistor, a second end grounded, and a fourth node connected to a control end of the fifth switch tube; and a second zener diode having an anode connected to the fourth node and a cathode connected to the second end of the fifth switch tube.

[0013] In a second aspect, the embodiments of the present application provide a vehicle, and the vehicle control mode implements the content of any of the above high-low beam lamp devices.

[0014] In the above embodiment, a vehicle high-low beam lamp device is designed, which comprises a heat sink, a high-low beam controller and an LED lens module. The high-low beam controller and the LED lens module are arranged adjacent to and close to the heat sink. The high-low beam controller comprises a power supply unit for providing constant voltage and constant current power supply to LED lamp beads in the LED lens module and a switching control unit for switching on part of the LED lamp beads in the LED lens module based on a low beam input signal and switching on at least part of the lamp beads in the LED lens module based on a high beam input signal. The number of the LED lamp beads switched on based on the high beam input signal is greater than the number of the LED lamp beads switched on based on the low beam input signal. Thus, by integrating the high-low beam controller and the LED lens module and arranging them near the same heat sink, the heat dissipation efficiency is optimized, and the number of the LED lamp beads switched on is accurately controlled based on different input signals, so as to realize accurate switching of the high-low beam. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed in the description of the specific embodiments or prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1a A structural block diagram of a vehicle high-low beam lamp device according to an embodiment of the present application is provided.

[0017] Figure 1b A schematic diagram of a vehicle high-low beam lamp device according to an embodiment of the present application is provided.

[0018] Figure 2 A structural block diagram of a vehicle high-low beam lamp device according to another embodiment of the present application is provided.

[0019] Figure 3 A circuit schematic diagram of a first LED switching circuit according to an embodiment of the present application is provided.

[0020] Figure 4 A circuit schematic diagram of a second LED switching circuit according to an embodiment of the present application is provided.

[0021] Figure 5 A circuit schematic diagram of a third LED switching circuit according to an embodiment of the present application is provided.

[0022] Figure 6 A circuit schematic diagram of an LED lens module according to an embodiment of the present application is provided.

[0023] Figure 7aA structural block diagram of a power supply unit according to an embodiment of the present application is provided.

[0024] Figure 7b A circuit schematic diagram of an input filter circuit according to an embodiment of the present application is provided.

[0025] Figure 7c A circuit schematic diagram of an output filter circuit according to an embodiment of the present application is provided.

[0026] Figure 8 A circuit schematic diagram of a DC-DC conversion circuit according to an embodiment of the present application is provided.

[0027] Figure 9 A circuit schematic diagram of an input protection circuit according to an embodiment of the present application is provided. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the scope of protection of the present application.

[0029] In modern automobile technology, the control of high beam and low beam is not only a key factor to ensure the safety of vehicle driving, but also an important link to improve the driving experience and road lighting efficiency. However, in the related art, the controller integrated with high beam and low beam and the high beam and low beam LED lens module are two independent components. The controller and the lens component each need a separate heat sink and mounting and positioning structure, and the controller generally adopts a boost topology structure or a linear drive topology structure. The high beam and low beam device integrated with the boost topology structure has the following limitations:

[0030] 1. The output voltage of the controller is high, and the electromagnetic radiation and noise are high;

[0031] 2. The withstand voltage requirement of the output capacitor is high, and a high-voltage capacitor needs to be used, resulting in high cost of the device and large size of the overall device;

[0032] 3. The volume requirement of the inductor is large in design area and high in application cost.

[0033] And the high beam and low beam device integrated with the linear drive topology structure also has the following limitations:

[0034] 1. If the controller of the high beam and low beam device is not designed sufficiently, the linear constant current device is prone to have high and concentrated heat, which causes the linear constant current device to be damaged due to the inability to dissipate heat;

[0035] 2. The controller of the high / low beam device has a large amount of heat, which is easy to cause heat concentration and damage the device.

[0036] Therefore, according to the embodiments of the present application, a vehicle high / low beam device is provided, as shown in the drawings, which comprises a radiator 110, a high / low beam controller 120 and an LED lens module 130. Figure 1a

[0037] The radiator 110 can be a device component for dissipating heat generated in an electronic device, which is used to keep the vehicle high / low beam device 100 running normally at a safe working temperature. The LED lens module 130 can be a light-emitting unit in the vehicle high / low beam device, which can be composed of a plurality of LED beads and is configured with a lens to focus and guide light. The high / low beam controller 120 can be a circuit unit for managing the power supply and light switching of the LED lens module.

[0038] Specifically, the high / low beam controller 120 and the LED lens module 130 are adjacent to and close to the radiator 110. For example, as shown in the drawings, the vehicle high / low beam device 100 comprises a lens glass 10, an upper lens bracket 20, a lower lens bracket 30, a high beam condenser 40, a low beam condenser 50, a cutoff line baffle 60, a radiator 110, a high / low beam controller 120 and an LED lens module 130. Figure 1b

[0039] The high / low beam controller 120 comprises a power supply unit 101 and a switching control unit 103.

[0040] The power supply unit 101 can be a circuit unit containing a power chip. The switching control unit 103 can be a circuit unit capable of receiving different trigger signals from the vehicle body controller and controlling the lighting of different numbers of LED beads in the LED lens module based on different input signals.

[0041] Specifically, the power supply unit 101 is configured to provide constant voltage and constant current power supply to the LED beads in the LED lens module. The switching control unit 103 is configured to switch on part of the LED beads in the LED lens module based on the low beam input signal, and switch on at least part of the LED beads in the LED lens module based on the high beam input signal. For example, when the high / low beam controller receives a signal from the vehicle body controller, the power supply unit 101 will activate the DC-D power chip and its related peripheral circuit inside based on the input signal, thereby generating a constant voltage and current. This stable power supply can provide stable power supply for each LED bead, ensuring that each LED bead is not affected by the voltage and current fluctuations caused by the change of input signal. ​​

[0042] It needs to be understood that in the lighting system of the vehicle, the setting of the low beam and the high beam is distinguished by controlling the number of LED lamp beads that are lit. When in the low beam mode, only the width of the low beam needs to reach 40 degrees, and at the same time the straight road guiding distance needs to reach more than 95m to achieve the purpose of keeping enough close-range lighting, i.e. only a small number of LED lamp beads are activated; when switched to the high beam mode, the illumination distance needs to reach more than 150m, i.e. a longer lighting range and stronger light need to be provided, so that more LED lamp beads need to be lit.

[0043] Therefore, the number of LED lamp beads that are lit based on the high beam input signal is greater than the number of LED lamp beads that are lit based on the low beam input signal. Exemplarily, if the LED lens module contains ten LED lamp beads, when the low beam is input, the high-low beam controller will correspondingly control at most six LED lamp beads in the LED lens module to be lit based on the input signal; when the high beam is input, the high-low beam controller will correspondingly control at least nine LED lamp beads in the LED lens module to be lit based on the input signal to generate the corresponding low beam or high beam effect. Further, under the premise of meeting the optimal optical performance, in order to prolong the service life of the components and keep the temperature of the controller low, all the LED lamp beads in the LED lens module will not be lit at the same time.

[0044] In the above embodiment, a vehicle high-low beam lamp device containing a heat sink, a high-low beam controller and an LED lens module is designed. The high-low beam controller and the LED lens module are arranged adjacent to and close to the heat sink, and the high-low beam controller comprises: a power supply unit for providing a constant voltage and constant current power supply to the LED lamp beads in the LED lens module, and a switching control unit for switching the lighting of part of the LED lamp beads in the LED lens module based on a low beam input signal, and switching the lighting of at least part of the lamp beads in the LED lens module based on a high beam input signal. The number of LED lamp beads that are lit based on the high beam input signal is greater than the number of LED lamp beads that are lit based on the low beam input signal. Thus, by integrating the high-low beam controller and the LED lens module and installing them near the same heat sink, the heat dissipation efficiency is optimized, and the lighting of different numbers of LED lamp beads is accurately controlled based on different input signals, so that the accurate switching of the high-low beam is realized.

[0045] In some embodiments, please refer to Figure 2 The switching control unit 103 comprises a first LED switching circuit 201, a second LED switching circuit 203 and a third LED switching circuit 205.

[0046] The first LED switching circuit 201, the second LED switching circuit 203 and the third LED switching circuit 205 can be circuit units for controlling the lighting states of different LED lamp beads in the LED lens module according to input signals. For example, the first LED switching circuit, the second LED switching circuit and the third LED switching circuit can include electronic switches, which are connected or disconnected under the control of different input signals, thereby causing different LED lamp beads in the LED lens module to light up or turn off.

[0047] It should be understood that, in order to prolong the service life of components and maintain a low temperature of the controller while meeting the optimal optical performance, all LED lamp beads in the LED lens module cannot be lit up at the same time. Therefore, the first LED switching circuit 201, the second LED switching circuit 203 and the third LED switching circuit 205 can be used to achieve specific lighting functions for different light modes of the vehicle.

[0048] Specifically, the first LED switching circuit 201 and the second LED switching circuit 203 switch part of the LED lamp beads in the LED lens module to light up based on the low beam input signal; the first LED switching circuit 201, the second LED switching circuit 203 and the third LED switching circuit 205 switch at least part of the lamp beads in the LED lens module to light up based on the high beam input signal. That is, in the low beam mode, the first LED switching circuit 201 and the second LED switching circuit 203 will respond to the low beam input signal and work together to activate certain LED lamp beads to ensure normal illumination in the low beam mode; in the high beam mode, in addition to the first LED switching circuit 201 and the second LED switching circuit 203 being activated, the third LED switching circuit 205 will also respond to the high beam input signal and work together with the first LED switching circuit 201 and the second LED switching circuit 203 to switch more LED lamp beads in the LED lens module to light up, so as to provide stronger light and ensure normal illumination in the high beam mode.

[0049] In the above embodiments, the lighting and extinguishing of multiple LED lamp beads are precisely controlled and managed through three different LED switching circuits, so as to provide longer illumination for the high beam mode and appropriate short-distance illumination for the low beam mode when needed. At the same time, different control signals are received by different LED switching circuits to control the high beam and low beam of the vehicle to light up in different ways, and smooth switching between the high beam and the low beam is also achieved.

[0050] In some embodiments, please refer to Figure 3 The first LED switching circuit 201 includes a first input module 301, a second input module 303, a first switch tube 305, a first resistor 307 and a first triode 309.

[0051] The first input module 301 can be a module for receiving the control signal of the low beam. Illustratively, when the vehicle needs to switch to the low beam mode, the first input module 301 receives the low beam input signal, thereby triggering other circuit elements in the first LED switching circuit 201 to perform corresponding operations. Similarly, the second input module 303 can be a module for receiving the control signal of the high beam. Illustratively, when the vehicle needs to switch to the high beam mode, the second input module 303 receives the high beam input signal, thereby triggering other circuit elements in the first LED switching circuit 201 to perform corresponding operations.

[0052] The first switch tube 305 can be an NMOS tube for controlling its conduction or cutoff according to the different high and low voltages input at the control end. Specifically, the control end of the first switch tube 305 is connected to the first input module 301 through the first resistor 307, the first end of the first switch tube 305 is connected to the first switching end 310 of the LED lens module, and the second end of the first switch tube 305 is connected to the second switching end 320 of the LED lens module.

[0053] It can be understood that since the two ends of the first switch tube 305 are connected to the first switching end 310 and the second switching end 320 of the LED lens module, the first switch tube 305 can control the lighting and extinguishing state of the LED lamp beads based on its conduction or cutoff state. Illustratively, when the first input module 301 inputs the low beam input signal, the control end of the first switch tube 305 receives a high level signal from the low beam input signal, and the first switch tube 305 corresponds to the conduction state, that is, the first switching end 310 of the LED lens module and the second switching end 320 of the LED lens module are short-circuited, so that part of the LED lamp beads contained in the first switching end 310 of the LED lens module and the second switching end 320 of the LED lens module are short-circuited and cannot be lit, to realize normal illumination in the low beam mode.

[0054] Further, the first triode 309 in the first LED switching circuit 201 can also be a transistor regarded as a switch. Specifically, the base of the first triode 309 is connected with the second input module 303, the emitter of the first triode 309 is grounded, and the collector of the first triode 309 is connected with the control end of the first switch tube 305 through the first resistor 307. Similarly, the first triode 309 can be used to control its conduction or turn-off according to the different high and low voltage input at its control end. For example, when the second input module 303 inputs the high beam input signal, the base of the first triode 309 receives the high level signal from the high beam input signal, and then the first triode 309 changes to the conduction state correspondingly. After the first triode 309 is turned on, its emitter is turned on to the ground, resulting in a decrease in the emitter voltage of the first triode 309.

[0055] It should be understood that, since the collector of the first triode 309 is connected with the control end of the first switch tube 305 through the first resistor 307, whether the first triode 309 is turned on or not will also affect the conduction state of the first switch tube 305, that is, the first triode 309 and the first switch tube 305 constitute a cascade switch control unit. Therefore, if the first triode 309 is turned on and the emitter voltage is decreased, the voltage at the control end of the first switch tube 305 will be correspondingly pulled down. Since the gate voltage of the first switch tube 305 is pulled down, the first switch tube 305 will be turned off. At this time, the first switching end 310 of the LED lens module and the second switching end 320 of the LED lens module are not short-circuited, so that part of the LED lamp beads contained therein are not disconnected and can be normally lighted to realize the illumination of stronger light in the high beam mode.

[0056] Optionally, the first LED switching circuit 201 further comprises an input filter circuit 311 and an input protection circuit 313. The input filter circuit 311 comprises two filter circuits, which are used to filter the low beam input signal input by the first input module 301 and the high beam input signal input by the second input module 303, respectively. Specifically, the filter circuit comprises a filter capacitor, a voltage stabilizing tube and a voltage dividing resistor connected in parallel, one end of which is grounded, and the other end of the circuit for filtering the first input module 301 is connected between the base of the first triode 309 and the first input module 301. Similarly, the other end of the other circuit for filtering the second input module 303 is connected between the base of the first triode 309 and the second input module 303. The input protection circuit 313 comprises a voltage stabilizing diode, which is connected reversely between the input module and the input filter circuit 311, and is used for input protection of the circuit.

[0057] In the above embodiment, the cascade control based on different input signals is realized by the first switch tube 305 and the first triode 309, which can flexibly and accurately switch between the low beam and high beam modes according to the lighting needs of the vehicle, thereby improving the lighting efficiency. Meanwhile, the design of the cascade control makes the circuit more stable during switching, avoiding voltage fluctuations caused by directly controlling a large current load.

[0058] In some embodiments, please refer to Figure 4 , the second LED switching circuit 203 includes a third input module 401, a fourth input module 403, a second switch tube 405, a second resistor 407, and a second triode 409.

[0059] Similarly, the third input module 401 can be a module for receiving a control signal of a low beam. Illustratively, when the vehicle needs to switch to the low beam mode, the third input module 401 receives a low beam input signal, thereby triggering other circuit elements in the second LED switching circuit 203 to perform corresponding operations. The fourth input module 403 can be a module for receiving a control signal of a high beam. Illustratively, when the vehicle needs to switch to the high beam mode, the fourth input module 403 receives a high beam input signal, thereby triggering other circuit elements in the second LED switching circuit 203 to perform corresponding operations.

[0060] The second switch tube 405 can also be an NMOS tube, which is used to control its conduction or turn-off according to the different high and low voltages input at the control end. Specifically, the control end of the second switch tube 405 is connected to the third input module 401 through the second resistor 407, the first end of the second switch tube 405 is connected to the second switching end 320 of the LED lens module, and the second end of the second switch tube 405 is grounded. Similarly, when the third input module 401 inputs a low beam input signal, the control end of the second switch tube 405 receives a high level signal from the low beam input signal, which corresponds to a conduction state, i.e. the second switching end 320 of the LED lens module is grounded, so that part of the LED lamp beads contained in the LED lens module are short-circuited and cannot be lit, to realize normal lighting in the low beam mode.

[0061] Further, the second triode 409 in the second LED switching circuit 203 can also be a transistor regarded as a switch. Specifically, the base of the second triode 409 is connected to the fourth input module 403, the emitter of the second triode 409 is grounded, and the collector of the second triode 409 is connected to the control end of the second switch tube 405 through the second resistor 407. Since the control end of the second switch tube 405 is connected to the collector of the second triode 409 through the second resistor 407, that is, the second triode 409 and the second switch tube 405 also constitute a cascaded switch control unit. Illustratively, when the fourth input module 403 inputs a high beam input signal, the base of the second triode 409 receives a high level signal from the high beam input signal, which corresponds to a conductive state, so that the emitter is turned on to the ground, thereby pulling down the voltage at the control end of the second switch tube 405, and the second switch tube 405 is turned off. At this time, the second switching end 320 of the LED lens module is not grounded, so that part of the LED lamp beads contained therein are not broken, and can be normally lit to achieve stronger light illumination in the high beam mode.

[0062] Optionally, the second LED switching circuit 203 further includes an input filter circuit 413 and an input protection circuit 415. The input filter circuit 413 includes a filter capacitor and a voltage dividing resistor connected in parallel, one end of which is grounded and the other end of which is connected between the base of the second triode 409 and the fourth input module 403, for filtering the high beam input signal input by the fourth input module 403. The input protection circuit 415 includes a transient suppression diode, one end of which is connected to the fourth input module 403 and the other end of which is grounded, for protecting the circuit from transient voltage spikes.

[0063] In the above embodiments, the cascaded control function of the MOS tube and the triode is designed based on different input signals, which can accurately switch between the low beam and the high beam according to the lighting needs of the vehicle. At the same time, the input signal is filtered by the input filter circuit, which reduces the noise and interference in the signal and ensures the stability and reliability of the control signal. Further, the input protection circuit provides input protection for the circuit, preventing damage to the circuit caused by excessive input voltage or reverse voltage, thereby improving the reliability of the entire system and reducing failures caused by external interference or power supply problems.

[0064] In some embodiments, please refer to Figure 5 , the third LED switching circuit 205 includes a fifth input module 501, a third switch tube 503, a fourth switch tube 505, a first voltage stabilizing tube 507, and a third resistor 509.

[0065] The fifth input module 501 can be a module for receiving a control signal of the high beam. Illustratively, when the vehicle needs to switch to the high beam mode, the fifth input module 501 receives a high beam input signal, thereby triggering other circuit elements in the third LED switching circuit 205 to perform corresponding operations.

[0066] The third switch tube 503 can be a transistor for controlling its conduction or turn-off according to the different high and low voltages input by the control end. Specifically, the control end of the third switch tube 503 is connected with the fifth input module 501, and the first end of the third switch tube 503 is grounded. Further, the fourth switch tube 505 can also be a transistor for controlling its conduction or turn-off according to the different high and low voltages input by the control end. Specifically, the first end of the fourth switch tube 505 is connected with the first end of the first switch tube 305, i.e. connected with the first switching end 310 of the LED lens module; the second end of the fourth switch tube 505 is connected with the third switching end 330 of the LED lens module; and the control end of the fourth switch tube 505 is connected with the second end of the third switch tube 503.

[0067] Illustratively, the third switch tube 503 can be an NMOS tube, and the fourth switch tube 505 can be a PMOS tube, which constitutes a cascade switch control unit. When the fifth input module 501 inputs the high beam input signal, the gate of the third switch tube 503 receives a high level signal from the high beam input signal and is correspondingly turned on to ground, so that the fourth switch tube 505 is also correspondingly turned on, thereby short-circuiting the first switching end 310 of the LED lens module and the third switching end 330 of the LED lens module, so that part of the LED lamp beads contained in the first switching end 310 of the LED lens module and the third switching end 330 of the LED lens module are short-circuited and cannot be lit, so as to cooperate with the first LED switching circuit 201 and the second LED switching circuit 203 to realize stronger light illumination in the high beam mode.

[0068] It can be understood that the first voltage stabilizing tube 507 and the third resistor 509 in the third LED switching circuit 205 can be used to provide protection and current limiting for the third switch tube 503 and the fourth switch tube 505. Specifically, the anode of the first voltage stabilizing tube 507 is connected to the control end of the fourth switch tube 505, and the cathode of the first voltage stabilizing tube 507 is connected to the second end of the fourth switch tube 505. The third resistor 509 is connected in parallel with the first voltage stabilizing tube 507. Exemplarily, the first voltage stabilizing tube 507 can be a freewheeling diode, which is used to protect the third switch tube 503 and the fourth switch tube 505 from reverse voltage spikes. That is, when the third switch tube 503 and the fourth switch tube 505 are closed, due to their characteristics, the current therein cannot be stopped instantaneously, which will generate a reverse electromotive force and thus damage the components. However, by the first voltage stabilizing tube 507, a circulating path can be provided for the reverse current, thereby protecting the third switch tube 503 and the fourth switch tube 505 from damage. Further, the parallel connection of the third resistor 509 and the first voltage stabilizing tube 507 also constitutes a voltage protection loop, which detects the voltage drop across the first voltage stabilizing tube 507 and thus monitors the state of the third LED switching circuit 205, so as to protect the components in the third LED switching circuit 205 from being damaged due to excessive current.

[0069] In the above embodiments, by precisely controlling the lighting state of part of the LED lamp beads in the LED lens module through the third LED switching circuit 205, the required lighting effect can be achieved under the premise of ensuring the optimal optical performance.

[0070] In some embodiments, referring to Figure 6 , the LED lens module includes the first LED lamp bead to the tenth LED lamp bead.

[0071] The first LED lamp bead to the tenth LED lamp bead can be LED light emitting diode, which can directly convert electric energy into visible light when current passes through. Optionally, under the premise of meeting the optimal optical performance, high-brightness PIN LED can be selected to ensure that the same current input has higher brightness and each electronic component generates less heat. Specifically, the first LED lamp bead, the fourth LED lamp bead and the seventh LED lamp bead are connected in series, the second LED lamp bead, the fifth LED lamp bead and the eighth LED lamp bead are connected in series, the third LED lamp bead, the sixth LED lamp bead, the tenth LED lamp bead and the ninth LED lamp bead are connected in series, the fourth LED lamp bead and the seventh LED lamp bead have a first node 601, the fifth LED lamp bead and the eighth LED lamp bead have a second node 603, the tenth LED lamp bead and the ninth LED lamp bead have a third node 605, the first node 601, the second node 603 and the third node 605 are connected together as the second switching end 320 of the LED lens module, the node between the sixth LED lamp bead and the tenth LED lamp bead is the first switching end 310 of the LED lens module, and the node between the third LED lamp bead and the sixth LED lamp bead is the third switching end 330 of the LED lens module.

[0072] It can be understood that the first switching end 310, the second switching end 320 and the third switching end 330 of the LED lens module are adapted to be connected with the first LED switching circuit 201, the second LED switching circuit 203 and the third LED switching circuit 205 in the high-low beam controller 120, so as to control the lighting state of the first LED lamp bead to the tenth LED lamp bead in the LED lens module based on different input signals.

[0073] Exemplarily, when the low beam input signal is input to the high-low beam controller 120, the first switch tube 305 in the first LED switching circuit 201 is turned on, so as to short the first switching end 310 of the LED lens module and the second switching end 320 of the LED lens module. At the same time, the second switch tube 405 in the second LED switching circuit 203 is also turned on, so as to ground the second switching end 320 of the LED lens module. That is, the seventh LED lamp bead to the tenth LED lamp bead are short-circuited and cannot be lit. That is, in the low beam mode, only the first LED lamp bead to the sixth LED lamp bead of the LED lens module remain lit, realizing normal illumination in the low beam mode.

[0074] It can also be understood that when the high beam input signal is input to the high-low beam controller 120, the first triode 309 in the first LED switching circuit 201 will be turned on, pulling down the gate voltage of the first switch tube 305, so that the first switch tube 305 is cut off. At this time, the first switching end 310 of the LED lens module and the second switching end 320 of the LED lens module are not short-circuited. At the same time, the second triode 409 in the second LED switching circuit 203 will also be turned on, pulling down the gate voltage of the second switch tube 405, so that the second switch tube 405 is cut off. At this time, the second switching end 320 of the LED lens module is also not grounded. That is, at this time, the seventh LED lamp bead to the tenth LED lamp bead are short-circuited to maintain the normal lighting state. Further, the third LED switching circuit 205 in the high-low beam controller 120 will also control the third switch tube 503 inside to be turned on based on the high beam input signal, so that the fourth switch tube 505 is also turned on to ground. Thus, the first switching end 310 of the LED lens module and the third switching end 330 of the LED lens module are short-circuited, causing the sixth LED lamp bead to be unable to be lit. That is, in the high beam mode, at this time, only the sixth LED lamp bead of the LED lens module cannot be lit, and the first LED lamp bead to the fifth LED lamp bead and the seventh LED lamp bead to the tenth LED lamp bead are still in the lighting state, realizing stronger light illumination in the high beam mode.

[0075] In the above embodiments, by controlling the lighting state of different LED lamp beads, flexible switching of the vehicle high beam and low beam modes is realized. In the low beam mode, only part of the LED lamp beads are lit, while in the high beam mode, more LED lamp beads are lit to provide stronger illumination. At the same time, even in the high beam mode, all the lamp beads in the LED lens module are not lit at the same time, reducing the power consumption of the high-low beam lamp device, thereby reducing the heat generation of the device and keeping the high-low beam lamp device working within a safe temperature range.

[0076] In some embodiments, please refer to Figure 7a The power supply unit 101 includes an input protection circuit 710, an input filter circuit 720, a DC-DC conversion circuit 730, and an output filter circuit 740.

[0077] The input protection circuit 710 can be a circuit loop for surge protection and reverse connection protection of the input power supply of the high-low beam controller, to protect the elements in the circuit from the voltage spikes and inrush current in the input power supply. After the input power supply passes through the input protection circuit 710, it first enters the input filter circuit 720, wherein the input filter circuit 720 is adapted to filter the input power supply. Exemplarily, please refer to Figure 7bThe input filter circuit 720 includes a plurality of filter capacitors and a filter inductor. Specifically, the capacitors C4, C5, C9, C10, C11, C12, C21, C22, C23, C24, and C29 and the inductor L2 form a π-shaped filter circuit for filtering the input power supply to remove high-frequency noise and interference in the power supply.

[0078] Further, the filtered input power supply is input to the DC-DC conversion circuit 730. The DC-DC conversion circuit 730 is adapted to convert the filtered input power supply and output a power supply. Specifically, the DC-DC conversion circuit 730 can be a power conversion circuit that converts the filtered input power supply into a specific power supply required. For example, depending on the relationship between the input voltage and the required output voltage, the DC-DC conversion circuit 730 can be a step-down topology, a step-up topology, a step-down-step-up topology, or an isolated conversion topology.

[0079] Finally, the power supply processed by the DC-DC conversion circuit 730 is input to the output filter circuit 740. The output filter circuit 740 can be a circuit loop for further filtering the power supply converted by the DC-DC conversion circuit 730 to ensure that the output voltage and current are more stable. For example, the output filter circuit 740 can include an LC filter composed of an inductor and a capacitor or other power filters. For the LC filter, please refer to Figure 7c The output filter circuit 740 includes a plurality of filter capacitors and a filter inductor. Specifically, the capacitors C2, C6, C7, C8, C13, C25, C26, and C27 and the inductor L1 form an LC filter circuit for filtering the power supply converted by the DC-DC conversion circuit 730 to reduce the ripple and noise in the power supply, thereby providing a constant voltage and constant current power supply for the LED lamp beads.

[0080] In the above embodiments, by designing the input protection circuit 710, the input filter circuit 720, the DC-DC conversion circuit 730, and the output filter circuit 740 in series, the input power supply is processed to ensure that the high-low light controller 120 can obtain a stable and clean power supply suitable for its operation from the input power supply provided by the vehicle body controller, and that the LED lens module 130 can obtain a constant voltage and constant current power supply, thereby ensuring the normal use performance and reliability of the entire vehicle high-low light device.

[0081] In some embodiments, the DC-DC conversion circuit 730 uses a DC-DC step-down chip to step down the filtered input power supply.

[0082] The DC-DC step-down chip can be a step-down DC-DC converter, which is used to convert a higher DC voltage into a lower DC voltage, and provide a constant current and constant voltage power supply for each LED lamp bead in the LED lens module according to the specific needs of the circuit. Optionally, the current required by each LED lamp bead can be set to 0.9A under the premise of meeting the optimal optical performance.

[0083] For example, referring to Figure 8 , the input power VIN is input to the input terminal of the DC-DC step-down chip U1 after filtering. The DC-DC step-down chip will switch the internal switching element at a high frequency to periodically turn on and off the input power VIN. When the switching element is turned on, the input power VIN will store energy in the inductor. When the switching element is turned off, the energy stored in the inductor is released to the load through the freewheeling diode integrated in the DC-DC step-down chip. In this process, the voltage of the inductor continues to drop due to multiple on-off, thereby achieving the function of voltage reduction based on the DC-DC step-down chip. Moreover, the DC-DC step-down chip will monitor the output voltage in real time through the feedback pin and compare it with the internal reference voltage. Finally, according to the comparison result, the DC-DC step-down chip can dynamically adjust the switching frequency or duty cycle of the switching element to maintain a stable output voltage. Further, in order to smooth the output voltage, a capacitor can be connected in parallel around the DC-DC step-down chip to filter out the voltage ripple caused by switching operation and provide a stable DC output.

[0084] In the above embodiment, the DC-DC conversion circuit 730 adopts a suitable DC-DC step-down chip according to the relationship between the input voltage and the required output voltage, converts a higher DC voltage into a lower DC voltage, and provides a constant current and constant voltage power supply for the overall circuit according to the specific needs of the circuit. Not only does it ensure high efficiency of power conversion, but it also reduces energy loss and provides a stable power supply.

[0085] In some embodiments, referring to Figure 9 , the input protection circuit 710 includes a transient voltage suppression tube 901, a first capacitor 903, a third resistor 905, a fifth switch tube 907, a fourth resistor 909, a fifth resistor 911, and a second voltage stabilizing tube 913.

[0086] Optionally, the transient voltage suppression tube 901, the first capacitor 903, and the third resistor 905 constitute a protection circuit 910, and the fifth switch tube 907, the fourth resistor 909, the fifth resistor 911, and the second voltage stabilizing tube 913 constitute an anti-reverse connection circuit 920.

[0087] The transient voltage suppression tube 901 can be a diode for protecting the circuit from sudden spikes in voltage or current. Specifically, the first end of the transient voltage suppression tube 901 is adapted to be connected to the input power supply, and the second end of the transient voltage suppression tube 901 is grounded. When a transient high voltage occurs in the input power supply, the transient voltage suppression tube 901 will quickly conduct to clamp the overvoltage to a safe level, thereby protecting the subsequent circuit.

[0088] The first capacitor 903 can be a filter capacitor for filtering high-frequency noise in the power supply. Specifically, the first capacitor 903 is connected in parallel with the transient voltage suppression tube 901. When a transient high voltage occurs in the input power supply, causing the transient voltage suppression tube 901 to conduct, the first capacitor 903 can provide additional current capacity to help it absorb transient energy.

[0089] The third resistor 905 can be a voltage dividing resistor for limiting the current flowing through the capacitor. Specifically, the third resistor 905 is connected in parallel with the first capacitor 903 and works together to protect the circuit.

[0090] Further, the fifth switch tube 907 can be a transistor for controlling the on-off of the current. Specifically, the first end of the fifth switch tube 907 is connected to the first end of the transient voltage suppression tube 901. Illustratively, the fifth switch tube 907 can be a PMOS transistor capable of carrying large current and voltage. When the positive and negative poles of the power supply are reversed, the fifth switch tube 907 can prevent current from flowing in the wrong direction, thereby protecting other elements in the circuit from damage, because its source and drain can withstand high reverse voltage.

[0091] The fourth resistor 909 can be a resistor for limiting the current flowing through the fifth switch tube 907. Specifically, the first end of the fourth resistor 909 is connected to the second end of the fifth switch tube 907. Illustratively, if the fifth switch tube 907 is a PMOS transistor, the fourth resistor 909 can be connected between the source and drain of the fifth switch tube 907 to protect it from excessive current.

[0092] The fifth resistor 911 can be a bias resistor for biasing the voltage of the fifth switch tube 907. Specifically, the first end of the fifth resistor 911 is connected to the second end of the fourth resistor 909, and the fifth resistor 911 has a fourth node 915, the second end of the fifth resistor 911 is grounded, and the fourth node 915 is connected to the control end of the fifth switch tube 907. When the fifth switch tube 907 detects an abnormal voltage, the fifth resistor 911 can provide a bias voltage to the gate of the fifth switch tube 907. At the same time, when the fifth switch tube 907 is off, the fifth resistor 911 can also discharge the gate.

[0093] The second voltage stabilizing tube 913 can be a voltage stabilizing diode providing voltage clamping function. Specifically, the anode of the second voltage stabilizing tube 913 is connected to the fourth node 915, and the cathode of the second voltage stabilizing tube 913 is connected to the second end of the fifth switch tube 907. The second voltage stabilizing tube 913 cooperates with the fifth switch tube 907 to protect the circuit components from voltage fluctuation when the input voltage abnormally rises.

[0094] In the above embodiment, through the joint action of the input protection circuit and the reverse connection protection circuit, the safety of the high / low beam controller 120 and the LED lens module 130 in the face of potential threats such as external input power fluctuation, transient voltage spike and power reverse connection is ensured. Further, by applying these circuits, the reliability and durability of the entire vehicle high / low beam device are improved.

[0095] It should be understood that the vehicle high / low beam device in the embodiment is presented in the form of functional units, where the units refer to ASIC (Application Specific Integrated Circuit) circuits, processors and memories executing one or more software or fixed programs, and / or other devices that can provide the above functions. Each module in the above vehicle high / low beam device can be implemented in whole or in part by software, hardware and their combination. The above modules can be embedded in or independent of the processor in the computer device in hardware form, or stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each of the above modules.

[0096] For the convenience of description, the above device is described in various units according to functions. Of course, the functions of each unit can be implemented in the same or multiple software and / or hardware when implementing the present application.

[0097] The embodiment also provides a vehicle, and the control mode of the vehicle implements the content of the above vehicle high / low beam device. The specific limitations of the vehicle can be referred to the limitations of the vehicle high / low beam device described above, which will not be described here.

[0098] The present application is described with reference to flowcharts and / or block diagrams according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices produce a device that implements the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0099] In the description of the specification, reference to "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0100] In addition, the terms "first", "second", etc. are used herein only to describe various embodiments and do not connote an ordering of importance, unless specifically stated otherwise. Thus, the features defined by "first", "second", etc. can include at least one of the features, either explicitly or implicitly.

[0101] It is also to be noted that the terms "comprising", "including", and "having" or variations thereof herein are intended to be open-ended terms that specify the presence of the stated elements but do not preclude the presence of additional elements. It is also to be noted that the term "consisting of" is intended to be a closed term that specifies the presence of only the stated elements. The term "comprising" is used herein to include the presence of one or more elements or ingredients, components, or steps, and the like, of the described embodiments.

[0102] Each of the embodiments described in the specification illustrate aspects of the application and are not meant to be an exhaustive list of all possible embodiments. Each of the embodiments can be combined with one another to form additional embodiments. The description of the embodiments is intended to be illustrative, and not to limit the scope of the application, as defined by the following claims.

[0103] The embodiments of the application described above are intended to be merely exemplary and those skilled in the art will readily suggest modifications and variations to the specific embodiments without departing from the scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the scope of the claims of the application.

[0104] Although the embodiments of the application have been described with reference to the accompanying drawings, various modifications and changes can be suggested to one skilled in the art, and it is intended that the application encompass such modifications and changes as fall within the scope of the appended claims.

Claims

1. A vehicle high beam low beam lamp device characterized by comprising: The application relates to a high-brightness LED headlamp, which comprises a radiator, a high-low beam controller and an LED lens module, the high-low beam controller and the LED lens module being arranged adjacent to and close to the radiator, the high-low beam controller comprising a power supply unit and a switching control unit, the power supply unit being configured to provide constant-voltage constant-current power supply for LED lamp beads in the LED lens module, the switching control unit being configured to switch on part of the LED lamp beads in the LED lens module based on a low-beam input signal and switch on at least part of the lamp beads in the LED lens module based on a high-beam input signal, wherein the number of the LED lamp beads switched on based on the high-beam input signal is greater than the number of the LED lamp beads switched on based on the low-beam input signal; the switching control unit comprises a first LED switching circuit, a second LED switching circuit and a third LED switching circuit, wherein the first LED switching circuit and the second LED switching circuit switch on part of the LED lamp beads in the LED lens module based on the low-beam input signal, and the first LED switching circuit, the second LED switching circuit and the third LED switching circuit switch on at least part of the lamp beads in the LED lens module based on the high-beam input signal; the first LED switching circuit comprises a first input module, a second input module, a first switch tube, a first triode, the first input module being adapted to receive the low-beam input signal, the second input module being adapted to receive the high-beam input signal, the control end of the first switch tube being connected with the first input module through a first resistor, the first end of the first switch tube being connected with the first switching end of the LED lens module, and the second end of the first switch tube being connected with the second switching end of the LED lens module, the base of the first triode being connected with the second input module, the emitter of the first triode being grounded, and the collector of the first triode being connected with the control end of the first switch tube through the first resistor; the second LED switching circuit comprises a third input module, a fourth input module, a second switch tube and a second triode, the third input module being adapted to receive the low-beam input signal, the fourth input module being adapted to receive the high-beam input signal, the control end of the second switch tube being connected with the third input module through a second resistor, the first end of the second switch tube being connected with the second switching end of the LED lens module, and the second end of the second switch tube being grounded, the base of the second triode being connected with the fourth input module, the emitter of the second triode being grounded, and the collector of the second triode being connected with the control end of the second switch tube through the second resistor; and the third LED switching circuit comprises a fifth input module, a sixth input module, a third switch tube and a third triode, the fifth input module being adapted to receive the low-beam input signal, the sixth input module being adapted to receive the high-beam input signal, the control end of the third switch tube being connected with the fifth input module through a third resistor, the first end of the third switch tube being connected with the second switching end of the LED lens module, and the second end of the third switch tube being connected with the first switching end of the LED lens module, the base of the third triode being connected with the sixth input module, the emitter of the third triode being grounded, and the collector of the third triode being connected with the control end of the third switch tube through the third resistor. The third LED switching circuit comprises a fifth input module adapted to receive the high beam input signal; a third switch tube, a control end of which is connected with the fifth input module, a first end of which is grounded; a fourth switch tube, a first end of which is connected with the first end of the first switch tube, a second end of which is connected with a third switching end of the LED lens module, a control end of which is connected with a second end of the third switch tube; a first voltage stabilizing tube, an anode of which is connected with the control end of the fourth switch tube, a cathode of which is connected with the second end of the fourth switch tube; and a third resistor, which is connected in parallel with the first voltage stabilizing tube.

2. The vehicle headlamp arrangement of claim 1, wherein The LED lens module comprises first to tenth LED lamp beads, wherein the first, fourth and seventh LED lamp beads are connected in series, the second, fifth and eighth LED lamp beads are connected in series, and the third, sixth, tenth and ninth LED lamp beads are connected in series, the fourth LED lamp bead and the seventh LED lamp bead have a first node therebetween, the fifth LED lamp bead and the eighth LED lamp bead have a second node therebetween, the tenth LED lamp bead and the ninth LED lamp bead have a third node therebetween, the first node, the second node and the third node are connected together as a second switching end of the LED lens module, a node between the sixth LED lamp bead and the tenth LED lamp bead is a first switching end of the LED lens module, and a node between the third LED lamp bead and the sixth LED lamp bead is a third switching end of the LED lens module.

3. The vehicle headlamp arrangement of claim 1, wherein The power supply unit comprises: an input protection circuit adapted to perform surge protection and reverse connection protection on an input power supply of the high beam controller; an input filter circuit adapted to perform filter processing on the input power supply; a DC-DC conversion circuit adapted to convert the filter-processed input power supply to output a power supply; an output filter circuit adapted to perform filter processing on the power supply to provide the constant-voltage constant-current power supply.

4. The vehicle headlamp arrangement of claim 3, wherein The DC-DC conversion circuit adopts a DC-DC step-down chip to step down and convert the filter-processed input power supply.

5. The vehicle headlamp arrangement of claim 3, wherein The input protection circuit comprises: a transient voltage suppression tube, a first end of which is adapted to be connected to the input power supply, and a second end of which is grounded; a first capacitor connected in parallel with the transient voltage suppression tube; a third resistor connected in parallel with the first capacitor; a fifth switch tube, a first end of which is connected with the first end of the transient voltage suppression tube; a fourth resistor, a first end of which is connected with a second end of the fifth switch tube; and a sixth resistor, a first end of which is connected with a second end of the fourth resistor. A fifth resistor, a first end of the fifth resistor is connected with the second end of the fourth resistor, and has a fourth node, a second end of the fifth resistor is grounded, and the fourth node is connected with a control end of the fifth switch tube; A second voltage stabilizer, an anode of the second voltage stabilizer is connected with the fourth node, and a cathode of the second voltage stabilizer is connected with the second end of the fifth switch tube.

6. A vehicle characterized by comprising: A vehicle high beam device comprising the vehicle high beam device according to any one of claims 1-5.

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