CN213973788U - Intelligent headlamp drive plate and control system thereof - Google Patents
Intelligent headlamp drive plate and control system thereof Download PDFInfo
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- CN213973788U CN213973788U CN202022752174.7U CN202022752174U CN213973788U CN 213973788 U CN213973788 U CN 213973788U CN 202022752174 U CN202022752174 U CN 202022752174U CN 213973788 U CN213973788 U CN 213973788U
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Abstract
An intelligent headlamp drive plate and a control system thereof relate to the technical field of automobile lighting. This intelligence headlight drive plate includes: a power management unit and a plurality of light emitting drivers; the first preset power supply output end of the power supply management unit is respectively and electrically connected with power supply ends of the multiple light-emitting drivers; the control end of each light-emitting driver is electrically connected with the light-emitting drive interface of the spatial light modulation control chip to obtain a control signal corresponding to each light-emitting driver, and the drive output end of each light-emitting driver is electrically connected with a light-emitting diode of one color to drive the light-emitting diode of the corresponding color to emit light under the control of the control signal. This intelligence headlight drive plate can realize the colour temperature regulation and control and the adjustting of the lighteness to car intelligence LED headlight to satisfy user's multiple demand.
Description
Technical Field
The utility model relates to an automotive lighting technical field particularly, relates to an intelligence headlight drive plate and control system thereof.
Background
The automobile headlamp is an indispensable functional device in an automobile as the eyes of the automobile, is arranged at the head of the front part of an automobile body, and is used at night or in the environment with poor light. The lighting effect of the automobile headlamp is related to the brightness of the automobile lamp and also directly related to the color temperature of the lamp light, the illumination focal length and the like. The automobile headlamps have the functions of high beam and low beam, and the high beam and the low beam are matched for use during night driving, so that drivers can be helped to identify obstacles in roads.
At present, the car headlight colour temperature among the prior art is more single, does not have the function that polychrome temperature changes and uses, and in addition, the illumination brightness of car headlight is also relatively more fixed, can only adjust between distance beam and short-distance beam, can't carry out intelligent regulation to illumination brightness according to the environmental change, and this driving safety and the driving experience that has just influenced the user.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an intelligence headlight drive plate and control system thereof, it can realize the colour temperature regulation and control and the adjustting of lighteness to car intelligence LED headlight to satisfy user's multiple demand.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
the utility model discloses an aspect provides an intelligence headlight drive plate, and this intelligence headlight drive plate includes: a power management unit and a plurality of light emitting drivers; the first preset power supply output end of the power supply management unit is respectively and electrically connected with power supply ends of the multiple light-emitting drivers; the control end of each light-emitting driver is electrically connected with the light-emitting drive interface of the spatial light modulation control chip to obtain a control signal corresponding to each light-emitting driver, and the drive output end of each light-emitting driver is electrically connected with a light-emitting diode of one color to drive the light-emitting diode of the corresponding color to emit light under the control of the control signal. This intelligence headlight drive plate can realize the colour temperature regulation and control and the adjustting of the lighteness to car intelligence LED headlight to satisfy user's multiple demand.
Optionally, the plurality of lighting drivers comprises at least the following lighting drivers: red light driver, green light driver, blue light driver.
Optionally, the drive plate further comprises: a fan driver; the second preset power supply output end of the power supply management unit is electrically connected with the power supply end of the fan driver, and the output end of the fan driver is electrically connected with the fan.
Optionally, the output of the fan driver comprises: the first fan interface is electrically connected with the first fan, and the second fan interface is electrically connected with the second fan; an air outlet of the first fan faces an optical machine of the intelligent headlamp drive board control system and is used for cooling the optical machine; the air outlet of the second fan faces the plate body of the intelligent headlamp drive plate and is used for cooling the plate body.
Optionally, the power management unit comprises: the power input end of the buck-boost conversion circuit is electrically connected with the power supply output end of the battery of the power management unit, and the power output end of the buck-boost conversion circuit is a first preset power supply output end.
Optionally, the power management unit further comprises: and the power supply input end of the protection circuit is electrically connected with the power supply output end of the battery, and the power supply output end of the protection circuit is electrically connected with the power supply input end of the buck-boost conversion circuit.
Optionally, the protection circuit comprises: the control input end of the reverse connection prevention chip is electrically connected with the source electrode of the transistor, the control output end of the reverse connection prevention chip is electrically connected with the drain electrode of the transistor, and the gate drive end and the gate control end of the reverse connection prevention chip are electrically connected with the gate electrode of the transistor; the source electrode of the transistor is electrically connected with the power supply output end of the battery, and the drain electrode of the transistor is a second preset power supply output end.
Optionally, the battery of the power management unit adopts a dc power socket of the vehicle power supply.
Optionally, the intelligent headlamp drive board further comprises an isolation structure connected to a plate body of the intelligent headlamp drive board, and the isolation structure is located between the fan driver and the light-emitting driver and used for isolating the fan driver from the light-emitting driver.
The utility model discloses an on the other hand provides an intelligence headlight drive plate control system, and this intelligence headlight drive plate control system includes: the intelligent headlamp drive board comprises a power supply, a spatial light modulation control chip and the intelligent headlamp drive board; the power supply is electrically connected with the power supply input end of a power supply management unit in the intelligent headlamp drive plate, and the light emitting drive interface of the spatial light modulation control chip is electrically connected with the control end of each light emitting driver in the intelligent headlamp drive plate.
The utility model discloses a further aspect provides an automobile, and this automobile includes: the intelligent headlamp drive board control system comprises a plurality of intelligent headlamp drive boards and a plurality of LEDs with different colors; the driving output end of each light-emitting driver in the intelligent headlamp driving board control system is electrically connected with a light-emitting diode with one color.
The beneficial effects of the utility model include:
this embodiment provides an intelligence headlight drive plate, this intelligence headlight drive plate includes: a power management unit and a plurality of light emitting drivers; the first preset power supply output end of the power supply management unit is respectively and electrically connected with power supply ends of the multiple light-emitting drivers; the control end of each light-emitting driver is electrically connected with the light-emitting drive interface of the spatial light modulation control chip to obtain a control signal corresponding to each light-emitting driver, and the drive output end of each light-emitting driver is electrically connected with a light-emitting diode of one color to drive the light-emitting diode of the corresponding color to emit light under the control of the control signal. Like this, when actual application, when the luminance of needs to the car light or the demonstration colour of car light were adjusted, then can supply each luminous driver's control signal through adjusting spatial light modulation control chip to carry out timesharing control and duty cycle size control to the emitting diode of each colour, thereby make multichannel emitting diode's regulation more nimble changeable, and then can realize the regulation to the light display effect of car light according to user's demand, so that the visual effect that finally presents is better, user experience has been improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is one of schematic diagrams of an intelligent headlamp drive plate according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a red light driving circuit provided by an embodiment of the present invention;
fig. 3 is an application diagram of a light-emitting driving chip according to an embodiment of the present invention;
fig. 4 is a second schematic diagram of an intelligent headlamp driving board according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a fan driving circuit according to an embodiment of the present invention;
fig. 6 is a third schematic diagram of an intelligent headlamp drive plate provided in the embodiment of the present invention;
fig. 7 is a fourth schematic diagram of an intelligent headlamp drive plate according to an embodiment of the present invention;
fig. 8 is an application diagram of a buck-boost conversion chip according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a protection circuit according to an embodiment of the present invention;
fig. 10 is a fifth schematic diagram of an intelligent headlamp drive plate according to an embodiment of the present invention;
fig. 11 is a schematic diagram of an intelligent headlamp drive board control system provided in the embodiment of the present invention;
fig. 12 is an overall hardware block diagram of an automobile according to an embodiment of the present invention.
Icon: 100-intelligent headlamp drive plate; 10-a power management unit; 11-a battery; 12-a buck-boost conversion circuit; 121-a buck-boost conversion chip; 13-a protection circuit; 131-an anti-reverse chip; q1-transistor; 20-a light emitting driver; 21-a light emitting driving chip; 211-red light driving chip; 30-a fan drive; 31-a fan driving chip; 40-an isolation structure; 200-an intelligent headlamp drive plate control system; 210-a spatial light modulation control chip; 220-a light emitting diode; 230-a fan; 231-a first fan; 232-a second fan; 310-CAN transceiver; 320-a single chip microcomputer; 330-an image format converter; 340-a signal converter; 350-a lighting controller; 360-digital micromirror.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
At present, the existing LED intelligent headlamp in the prior art can only project black and white patterns, the display content is single, the display brightness is relatively fixed, and the application requirements of a user in various scenes (such as requirements of rainy and foggy weather, dazzling prevention, interesting auxiliary driving and the like) are difficult to meet. In view of the above, the present application provides a novel intelligent headlamp driving plate 100 to solve the above problems, and the structure and effect of the intelligent headlamp driving plate 100 will be described and explained in detail below.
Referring to fig. 1, the present embodiment provides an intelligent headlamp driving board 100, where the intelligent headlamp driving board 100 includes: a power management unit 10 and a plurality of light emitting drivers 20; the first preset power supply output end of the power management unit 10 is electrically connected to the power supply ends of the multiple light-emitting drivers 20, respectively; the control terminal of each light emitting driver 20 is electrically connected to the light emitting driving interface of the spatial light modulation control chip 210 to obtain the control signal corresponding to each light emitting driver 20, and the driving output terminal of each light emitting driver 20 is electrically connected to the light emitting diode 220 of one color to drive the light emitting diode 220 of the corresponding color to emit light under the control of the control signal.
The power management unit 10 has a plurality of preset power output terminals, each for providing a voltage output to power one type of unit. Correspondingly, in this embodiment, in order to satisfy the adjustable brightness and color temperature condition and also satisfy the light flux requirement of each light emitting diode 220, the first preset power supply output end of the power management unit 10 is correspondingly selected to supply power to each light emitting driver 20, wherein a person skilled in the art can reasonably select the first preset power supply output end according to actual requirements. For example, the first preset power supply output terminal may be a 16V power supply output terminal, so that the output current of each light emitting diode 220 may reach between 20A and 25A, and the requirement of luminous flux is fully satisfied. Of course, those skilled in the art can also select other required preset power supply output terminals to supply power to each light-emitting driver 20 according to different luminous flux requirements.
Referring to fig. 1 again, the control terminal of each light emitting driver 20 in fig. 1 is electrically connected to the light emitting driving interface of the spatial light modulation control chip 210, so as to obtain the control signal of each light emitting driver 20. In other words, the external spatial light modulation control chip 210 is used to provide a control signal to each of the light emitting drivers 20 of the intelligent headlamp drive board 100, thereby individually controlling each of the light emitting drivers 20.
Each light emitting driver 20 is connected to a corresponding led 220 of one color. For example, when there are three light-emitting drivers 20, the light-emitting drivers correspond to the light-emitting diodes 220 with three different colors (for example, the three light-emitting drivers 20 are respectively connected to the light-emitting diodes 220 capable of emitting red light, such as a red LED lamp, the light-emitting diodes 220 capable of emitting green light, such as a green LED lamp, and the light-emitting diodes capable of emitting blue light, such as a blue LED lamp; hereinafter, red LED lamp, green LED lamp, and blue LED lamp are taken as examples for description).
The plurality of types of light-emission drivers 20 are two or more types of light-emission drivers 20. Thus, compared with the prior art that only one color of light emitting driver board can be emitted, the control signal supplied to each light emitting driver 20 can be adjusted, so that the light emitting time and the light emitting frequency of each light emitting diode 220 can be driven, the color temperature and the brightness of the intelligent headlamp driver board 100 can be changed, and the vehicle lamp display with various colors and various brightness can be obtained.
Optionally, the battery of the power management unit adopts a dc power socket of the vehicle power supply. The DC power supply seat of the vehicle-mounted power supply can bear the power specification of 20V/8A, the design output can reach 16V/6A, and the requirements of the intelligent headlamp drive plate 100 can be met.
In summary, the present embodiment provides an intelligent headlamp driving board 100, where the intelligent headlamp driving board 100 includes: a power management unit 10 and a plurality of light emitting drivers 20; the first preset power supply output end of the power management unit 10 is electrically connected to the power supply ends of the multiple light-emitting drivers 20, respectively; the control terminal of each light emitting driver 20 is electrically connected to the light emitting driving interface of the spatial light modulation control chip 210 to obtain the control signal corresponding to each light emitting driver 20, and the driving output terminal of each light emitting driver 20 is electrically connected to the light emitting diode 220 of one color to drive the light emitting diode 220 of the corresponding color to emit light under the control of the control signal. Like this, when in practical application, when the luminance of car light or the display color of car light need be adjusted, then can supply each control signal who sends out light driver 20 through adjusting spatial light modulation control chip 210 to carry out timesharing control and duty cycle size control to the emitting diode 220 of each colour, thereby make multichannel emitting diode 220's regulation more nimble changeable, and then can realize the regulation to the light display effect of car light according to user's demand, so that the visual effect that finally appears is better, user experience has been improved.
Optionally, the plurality of lighting drivers 20 comprises at least the following lighting drivers 20: red light driver, green light driver, and blue light driver. Therefore, the color lights of the three primary colors of red, green and blue are added in different proportion degrees, various color lights can be generated, and the requirements of users on various colors are favorably met.
Referring to fig. 2 in combination, fig. 2 is a schematic diagram of a red light driving circuit, for example, a control terminal (the control terminal is pin No. 8 of the red light driving chip 211) of a red light driving chip 211 of a red light driver is electrically connected to a light emitting driving interface of a spatial light modulation control chip 210, and is used to obtain a control signal of the spatial light modulation control chip 210, where in this embodiment, the control signal includes two types, one is an enable control signal, and the other is a current control signal; the first preset power supply output end of the power management unit 10 is electrically connected with a power supply end of the red light driving chip 211 (i.e. pin No. 1 of the red light driving chip 211) and is used for supplying power to the red light driving chip 211; the MOS transistor Q6, the MOS transistor Q7, the MOS transistor Q8, the MOS transistor Q9, and the MOS transistor Q10 are peripheral circuits of the red light driving chip 211, and are respectively connected to a control interface of the red light driving chip 211, and are used for overcurrent and output voltage control, so that the red light driving chip 211 is in dynamic balance; the driving output end of the red light driving chip 211 is electrically connected to the anode of the light emitting diode 220 (here, a red LED lamp), and the cathode of the red LED lamp is grounded. Since the basic principles of the three driving circuit diagrams are the same, the present embodiment only takes the red light as an example for description, and the basic principles of the green light and blue light driving circuits can be referred to the description of the red light driving circuit, which is not repeated herein.
Please refer to fig. 2, the MOS transistor Q6, the MOS transistor Q7, the MOS transistor Q8, and the MOS transistor Q9 collectively form a voltage reduction circuit to control the voltage and the current of the external red LED lamp, so as to adjust the brightness of the red LED lamp. The No. 4 pins of the MOS tube Q6 and the MOS tube Q7 are gate-connected with the No. 16 pin HG (high side field effect tube driving pin of the voltage reduction circuit) of the red light driver, and the three source electrode pins (No. 1 pin, No. 2 pin and No. 3 pin) are connected with a load. The gate of the No. 4 pins of the MOS transistor Q8 and the MOS transistor Q9 is connected with the No. 12 pin LG (high side field effect transistor driving pin of the step-down circuit) of the red light driver, and the three source electrode pins (No. 1 pin, No. 2 pin and No. 3 pin) are connected with a load. The MOS tube Q10 control is equivalent to enable and controls the on or off of the red LED lamp. The Q10 gate pin (i.e. pin 4) is connected to pin SDRV 9 (dimming output pin) of the red light driver for controlling the MOSFETs connected in parallel across the LEDs.
The lighting driver 20 is required to be capable of receiving an analog signal and a PWM signal (pulse width modulation signal) in an input range supporting a voltage of 7V-85V, so as to provide an excellent dimming control range, and provide cycle-by-cycle current protection, overvoltage protection and thermal shutdown in reliability. The specification of the selected red light diode is 3.5V/20A, and the specification of the selected green light diode and the selected blue light diode is 3.5V/25A. The application and corresponding connection relationship of the circuit can be seen in fig. 3, and fig. 3 is an application diagram of the light-emitting driving chip 21 provided in this embodiment. It should be understood that the model numbers of the chips given in the present embodiment can be reasonably selected by those skilled in the art according to the application requirements, and the present application does not specifically limit the model numbers of the chips.
In addition, various parameters in the red light driving circuit can be calculated according to the output voltage and the output current of the red light LED lamp.
Illustratively, regarding the design of the output voltage-related parameter, when the output electrical parameter of the red LED lamp is 3.5V/20A, R can be calculated according to the following formulaVOUT1And RVOUT2The corresponding value of (c):
wherein, VOUTTo be transportedFeedback value of output voltage, RVOUT1Is a first divider resistor, RVOUT2Is a second divider resistor, R is a resistorVOUT1And RVOUT2The ratio of the parameters is set to a conventional value empirically, so that R can be obtainedVOUT1And RVOUT2The corresponding value of (a). And R isVOUT1Corresponding to R in the red light driving circuit39And RVOUT2Corresponding to R in the red light driving circuit29。
Illustratively, with respect to the switching frequency dependent parametric design, the switching frequency depends on RonAnd CONR in the red light driving circuitON＝R21＝10K，CON＝C36When 330pF, f can be calculated according to the following formulaswThe corresponding value of (c):
wherein R isonIs a resistance of an RC oscillating circuit, CONIs the capacitance of an RC oscillating circuit, fswTo the switching frequency, RONAnd CONPin No. 2 (i.e., RON frequency adjustment pin), R, connected to red light driveronCorresponding to R in the red light driving circuit21，ConCorresponding to the red light driving circuit is C36. And R isvout1And Rvout2And correspondingly selecting the parameters obtained by the calculation.
Illustratively, for the design of average current related parameters, according to the maximum current of the red LED lamp is 20A, if applicable, V is takenIADJ＝2.5V、VREF＝3.3V、RIADJ1R can be calculated according to the following formula, 10KcsAnd RIADJ2The corresponding value of (c):
wherein, ILEDAverage current of red LED lamp, VIADJVoltage of IADJ pin (i.e. pin No. 6) of red light driver, RcsIs the resistance of the CS pin (namely the No. 11 pin) of the red light driver, VREFVoltage of VREF pin (i.e. pin No. 5) of red light driver, RIADJ1First divider resistor, R, being an IADJ pin of a red light driverIADJ2A second divider resistor that is the IADJ pin of the red light driver.
For example, regarding the inductance-related parameter design, if the efficiency η is set to 90% based on the circuit input voltage value (16V in the present embodiment) of the red light driving circuit, the corresponding values of D and L can be calculated according to the following formula:
wherein D is the inductive voltage-second balance, and η is the efficiency VINIs the input voltage value of the red light driving circuit, L is the inductance, Delta iL-ppIs the inductor ripple current. Thus, corresponding values of L and D can be obtained. L corresponds to L in the red light driving circuitP3。
Illustratively, with respect to output capacitance related parameter design, at the time of application, V is setLED-PP＝1V，RDWhen 0.175 Ω, C can be calculated according to the following formulaOUTThe corresponding value of (c):
wherein, COUTTo output capacitance,. DELTA.iLED-ppIs red LED ripple current, RDIs the dynamic resistance of a red LED lamp, and Δ iL-ppAnd fswCorresponding selectionThe parameters obtained by the above calculation.
It should be understood that the above-mentioned manner for calculating each parameter in the red light driving circuit is only an example of this embodiment, and in other embodiments, a person skilled in the art may select other calculation manners according to practical situations, and the application is not limited thereto.
Since the determination principle of each parameter in the three driving circuits is the same, the embodiment has been described only by taking the red light as an example, and the determination manner of each parameter in the green light and blue light driving circuits can be referred to the determination manner description of each parameter in the red light driving, which is not described herein again.
In addition, in order to achieve the cooling and heat dissipation effect, so that the intelligent headlamp drive board 100 is kept in a good working state, in this embodiment, please refer to fig. 4 and 5, fig. 5 is a schematic diagram of a drive circuit of the fan 230 provided in this embodiment, and optionally, the intelligent headlamp drive board 100 further includes a fan driver 30; the second predetermined power output terminal of the power management unit 10 is electrically connected to a power terminal of the fan driver 30, and the driving output terminal of the fan driver 30 is electrically connected to the fan 230.
Referring to fig. 5, a power end of the fan driving chip 31 of the fan driver 30 (i.e. pin No. 1 of the fan driving chip 31) is electrically connected to a second preset power output end of the power management unit 10; the MOS transistor Q24, the MOS transistor Q25, the MOS transistor Q26, and the MOS transistor Q27 are peripheral circuits of the fan driving chip 31, and are respectively connected to a control interface of the fan driving chip 31 for overcurrent and output voltage control, so that the fan driving chip 31 is in dynamic balance; the driving output terminal of the fan driving chip 31 is electrically connected to the anode of the fan 230, and the cathode of the fan 230 is grounded. In addition, the control driving interface of the single chip 320 is electrically connected to the MOS transistor Q26 and the MOS transistor Q27, respectively, so as to control the MOS transistor Q26 and the MOS transistor Q27 in the form of a PWM control signal, thereby achieving the purpose of controlling the rotation speed of the fan 230.
Optionally, referring to fig. 6, the output end of the fan driver 30 includes a first fan 231 interface and a second fan 232 interface, the first fan 231 interface is electrically connected to the first fan 231, and the second fan 232 interface is electrically connected to the second fan 232; an air outlet of the first fan 231 faces the optical machine of the intelligent headlamp drive board control system 200 and is used for cooling the optical machine; the air outlet of the second fan 232 faces the plate body of the intelligent headlamp driving plate 100, and is used for cooling the plate body. The optical machine is an imaging lens and is used for imaging an image on a DMD (digital micromirror device) core component of the DLP (digital light processing) projection system to a target position.
In addition, when there are two fans 230, the first fan 231 is used to cool the light engine, and the second fan 232 is used to cool the panel body of the intelligent headlamp driving board 100; when there is only one fan 230, the fan 230 is used to cool the panel body of the intelligent headlamp driving board 100.
In order to facilitate the controlled conversion of the voltage supplied to the power terminals of the light emitting driver 20 as required, referring to fig. 7, optionally, the power management unit 10 includes: the Boost-Buck conversion circuit 12 (also called Buck-Boost circuit) is characterized in that a power input end of the Boost-Buck conversion circuit 12 is electrically connected with a power supply output end of the battery 11 of the power management unit 10, and a power output end of the Boost-Buck conversion circuit 12 is a first preset power supply output end.
It should be noted that the Buck-Boost circuit is a single-tube non-isolated dc converter whose output voltage may be lower or higher than the input voltage, and may also be regarded as a series connection of a Buck converter and a Boost converter. Referring to fig. 8, the Buck-Boost conversion chip 121 adopted by the Buck-Boost circuit is applied, and in this embodiment, it should be satisfied that the designed output of the Buck-Boost circuit is 16V/6A, which can support an input voltage range of 6V to 18V, and the output of the Buck-Boost conversion chip is used for supplying power to various light-emitting drivers 20.
In order to protect the circuit of the intelligent headlamp driver board 100 and prevent the short circuit, please refer to fig. 7, optionally, in this embodiment, the power management unit 10 further includes: and a power input end of the protection circuit 13 is electrically connected with a power supply output end of the battery 11, and a power output end of the protection circuit 13 is electrically connected with a power input end of the buck-boost conversion circuit 12.
For example, in this embodiment, please refer to fig. 7 and fig. 9 in combination, and fig. 9 is a schematic diagram of the protection circuit 13 provided in this embodiment, where the protection circuit 13 may include: the chip 131 and the transistor Q1 are prevented from being connected in an anti-reverse mode, the control input end of the chip 131 is electrically connected with the source electrode of the transistor Q1, the control output end of the chip 131 is electrically connected with the drain electrode of the transistor Q1, and the gate driving end and the gate control end of the chip 131 are electrically connected with the gate electrode of the transistor Q1; the source of the transistor Q1 is electrically connected to the power supply output terminal of the battery 11, and the drain of the transistor Q1 is a second preset power supply output terminal. Therefore, the switch of the MOS tube Q1 can be controlled to realize the turn-off in the reverse connection, and the short-circuit protection is realized.
It should be noted that the output end of the protection circuit 13 is electrically connected to a power supply end of the fan driver 30, and is used for supplying power to the fan driver 30. In this embodiment, the voltage at the output of the protection circuit 13 is between 8V and 18V.
In order to avoid interference to other circuits (for example, a plurality of light emitting diode 220 circuits) caused by the fan 230 ripple current and noise in the process of cooling the fan 230 driven by the fan driver 30, referring to fig. 10, in this embodiment, optionally, the intelligent headlamp driver board 100 further includes an isolation structure 40 connected to a plate body of the intelligent headlamp driver board 100, where the isolation structure 40 is located between the fan driver 30 and the light emitting driver 20, and is used to isolate the fan driver 30 from the light emitting driver 20.
In this embodiment, referring to fig. 10, for example, the isolation structure 40 may be an isolation board, which is connected to a board body of the intelligent headlamp driving board 100 and is used for isolating the driving circuit of each light emitting diode 220 and the power management unit 10 from one side of the isolation board and isolating the driving circuit of the fan 230 from the other side of the isolation board. In this way, the fan 230 is prevented from rotating to affect other circuit components. It should be understood that the above-mentioned isolation board is only an example of the present application, and in other embodiments, the isolation structure 40 may be provided in other structural forms, which is not limited in this application as long as it can isolate the driving circuit of the fan 230 from other circuits.
In the present embodiment, the light emitting diodes 220 of the plurality of colors (hereinafter, red, green, and blue are taken as examples) are respectively controlled by the spatial light modulation control chip 210, so as to perform time-sharing control on the red, green, and blue three-way control circuits, and thus, time-sharing on/off of different colors can be realized. In the modulation process, in order to meet the test of each optical index when the white balance color temperature is debugged and the ray apparatus normally works, the duty ratio of the red, green and blue street lamps is satisfied as 3: 6: 1.
referring to fig. 11, another aspect of the present invention further provides an intelligent headlamp drive plate control system 200, where the intelligent headlamp drive plate control system 200 includes: a power supply, a spatial light modulation control chip 210 and the intelligent headlamp drive plate 100; the power supply is electrically connected to the power supply input end of the power supply management unit 10 in the intelligent headlamp drive board 100, and the light emitting drive interface of the spatial light modulation control chip 210 is electrically connected to the control end of each light emitting driver 20 in the intelligent headlamp drive board 100.
Since the structure and the beneficial effects of the driving board 100 have been described and illustrated in detail in the foregoing, they are not described herein again. This intelligence headlight drive plate control system 200 is when the actual application, when needs adjust the luminance of car light or the demonstration colour of car light, can supply with the control signal of each luminous driver 20 through adjusting spatial light modulation control chip 210, with carry out timesharing control and duty cycle size control to the emitting diode 220 of each colour, thereby make multichannel emitting diode 220's regulation more nimble changeable, and then can realize the regulation according to the light display effect of user's demand to the car light, so that the visual effect that finally presents is better, user experience has been improved.
The utility model discloses a still another aspect provides a car, and this car includes: the above-mentioned intelligent headlight drive board control system 200 and the light emitting diodes 220 of various colors; the driving output end of each light emitting driver 20 in the intelligent headlamp driving board control system 200 is electrically connected to a light emitting diode 220 of one color. Thus, the light emitting diodes 220 of various colors can be controlled to emit light by the intelligent headlamp drive board control system 200, so that the target color temperature and the target brightness of the automobile can be displayed by the illuminating lamp.
Fig. 12 is a block diagram of the overall hardware of the automobile according to the present embodiment, wherein the overall hardware of the automobile mainly includes a single chip microcomputer 320, an image format converter 330, a signal converter 340, a CAN transceiver 310, a lighting controller 350, a digital micro mirror 360, and an intelligent headlamp driving board control system 200.
Each preset power supply output end of the power management unit 10 of the intelligent headlamp drive plate control system 200 is electrically connected with the image format converter 330, the single chip microcomputer 320, the signal converter 340, the spatial light modulation control chip 210 of the intelligent headlamp drive plate control system 200, the lighting controller 350 and the multi-channel light emitting driver 20 of the intelligent headlamp drive plate control system 200, and is used for respectively supplying power to sub-power supplies of each unit; two control output ends of the single chip microcomputer 320 are respectively and electrically connected with control input ends of the signal converter 340 and the image format converter 330, and are used for respectively inputting control signals to the signal converter 340 and the image format converter 330; the image output end of the image format converter 330 is electrically connected with the image input end of the spatial light modulation control chip 210, and is used for inputting image signals to the spatial light modulation control chip 210; the signal output end of the signal converter 340 is electrically connected with the signal input end of the spatial light modulation control chip 210, and is used for inputting a control signal to the spatial light modulation control chip 210; the spatial light modulation control chip 210, the illumination controller 350 and the Digital micromirror 360 (DMD for short, which is connected to a port of the spatial light modulation control chip 210) are used as a control platform of the DLP module, and are configured to drive the Digital micromirror 360, which is a core component of the DLP projection system, to display according to the image signal input of the image format converter 330 and the control signal input of the signal converter 340; the light emitting driving interface of the spatial light modulation control chip 210 is electrically connected to the multi-channel light emitting driver 20, and is configured to input a corresponding control signal to the multi-channel light emitting driver 20.
The image format converter 330 is used for converting the image format from HDMI to RGB 888; the signal converter 340 is used for converting the FPD-LINK signal into an LVDS signal; the power supply management unit 10 provides the available power supply voltages for the sub power supplies, including 6.5V \ 5V \3.3V \1.8V \1.1V, etc.; the lighting controller 350 supplies power to the DMD through its internal power management module (the available supply voltage includes 16V/8.5V/-10V, etc.); the spatial light modulation control chip 210 is configured to input a control signal to the multi-channel light emitting driver 20, a driving output terminal of each light emitting driver 20 of the multi-channel light emitting driver 20 is configured to be electrically connected to a light emitting diode 220 of one color, and the spatial light modulation control chip 210 is configured to control each light emitting driver 20 respectively, so as to control the light emitting diode 220 of each corresponding color.
It should be noted that the multi-channel lighting driver 20 is only a short name for the plurality of lighting drivers 20 in the intelligent headlamp driver board 100 of the intelligent headlamp driver board control system 200. The multi-channel lighting driver 20 may comprise 2 lighting drivers 20, 3 lighting drivers 20, 4 lighting drivers 20 or 5 lighting drivers 20 etc. Correspondingly, when the number of channels is changed, the number of the corresponding light emitting drivers 20 is also changed accordingly. For example, when 3 light emitting drivers 20 are adopted, the driving output terminal of each light emitting driver 20 is connected to the light emitting diode 220 of one color, and each light emitting driver 20 is individually controlled by the spatial light modulation control chip 210.
The above description is only an alternative embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
Claims (10)
1. The utility model provides an intelligence headlight drive plate which characterized in that includes: a power management unit and a plurality of light emitting drivers;
the first preset power supply output end of the power supply management unit is respectively and electrically connected with the power supply ends of the multiple light-emitting drivers;
the control end of each light-emitting driver is electrically connected with the light-emitting drive interface of the spatial light modulation control chip to obtain a control signal corresponding to each light-emitting driver, and the drive output end of each light-emitting driver is electrically connected with a light-emitting diode of one color to drive the light-emitting diode of the corresponding color to emit light under the control of the control signal.
2. The intelligent headlamp driver board of claim 1, wherein the plurality of lighting drivers at least include: red light driver, green light driver, and blue light driver.
3. The intelligent headlamp drive plate of claim 1, wherein the drive plate further comprises: a fan driver; the second preset power supply output end of the power supply management unit is electrically connected with the power supply end of the fan driver, and the driving output end of the fan driver is electrically connected with the fan.
4. The intelligent headlamp driver board of claim 3, wherein the output of the fan driver comprises: the fan comprises a first fan interface and a second fan interface, wherein the first fan interface is electrically connected with a first fan, and the second fan interface is electrically connected with a second fan; the air outlet of the first fan faces to a light machine of the intelligent headlamp drive board control system and is used for cooling the light machine; the air outlet of the second fan faces towards the plate body of the intelligent headlamp driving plate and is used for cooling the plate body.
5. The intelligent headlamp drive plate of claim 3, wherein the power management unit comprises: the power supply output end of the battery of the power supply management unit is electrically connected with the power supply input end of the buck-boost conversion circuit, and the power supply output end of the buck-boost conversion circuit is the first preset power supply output end.
6. The intelligent headlamp drive plate of claim 5, wherein the power management unit further comprises: and the power supply output end of the protection circuit is electrically connected with the power supply input end of the buck-boost conversion circuit.
7. The intelligent headlamp drive plate of claim 6, wherein the protection circuit comprises: the control input end of the reverse connection prevention chip is electrically connected with the source electrode of the transistor, the control output end of the reverse connection prevention chip is electrically connected with the drain electrode of the transistor, and the gate drive end and the gate control end of the reverse connection prevention chip are electrically connected with the gate of the transistor; and the source electrode of the transistor is electrically connected with the power supply output end of the battery, and the drain electrode of the transistor is the second preset power supply output end.
8. The intelligent headlamp driver board according to claim 3, further comprising an isolation structure connected to a plate body of the intelligent headlamp driver board, wherein the isolation structure is located between the fan driver and the lighting driver and is used for isolating the fan driver from the lighting driver.
9. The intelligent headlamp driver board according to claim 1, wherein the battery of the power management unit is a dc power socket of a vehicle-mounted power supply.
10. The utility model provides an intelligence headlight drive plate control system which characterized in that includes: a power supply, a spatial light modulation control chip, and the intelligent headlamp drive board of any one of the preceding claims 1-8; the power supply is electrically connected with a power supply input end of a power supply management unit in the intelligent headlamp drive plate, and a light emitting drive interface of the spatial light modulation control chip is electrically connected with a control end of each light emitting driver in the intelligent headlamp drive plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022752174.7U CN213973788U (en) | 2020-11-24 | 2020-11-24 | Intelligent headlamp drive plate and control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022752174.7U CN213973788U (en) | 2020-11-24 | 2020-11-24 | Intelligent headlamp drive plate and control system thereof |
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| Publication Number | Publication Date |
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| CN213973788U true CN213973788U (en) | 2021-08-17 |
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| CN202022752174.7U Active CN213973788U (en) | 2020-11-24 | 2020-11-24 | Intelligent headlamp drive plate and control system thereof |
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| Country | Link |
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| CN (1) | CN213973788U (en) |
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