CN214592081U

CN214592081U - Car light control module

Info

Publication number: CN214592081U
Application number: CN202120679368.0U
Authority: CN
Inventors: 朱丹; 任康成; 姚肖勇; 刘梦璇; 张莎; 何顺星
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-11-02
Anticipated expiration: 2031-04-02

Abstract

The utility model relates to the field of vehicle lamps, in particular to a vehicle lamp control module, which comprises a control signal input end and an alarm signal output end, wherein the control signal input end is connected with a controller and a first switch circuit and is used for controlling the circuit work of the vehicle lamp; when the controller outputs a low level signal, the vehicle lamp is not on; if one LED in the car lamp circuit has a fault, the abnormity warning circuit extinguishes all the LED lamps in the module, and simultaneously feeds the fault back to the controller for error reporting to remind a driver of paying attention.

Description

Car light control module

Technical Field

The utility model relates to a car light field, concretely relates to car light control module.

Background

At present, the LED is used as fourth-generation illumination, and is widely applied to various illuminations due to the advantages of energy conservation, environmental protection, long service life, high lighting effect, rich colors, small volume, flicker resistance, high reliability, convenient regulation and control and the like; the use of automobile LED lamps also gradually becomes the main characteristic of the future generation of automobiles, and meanwhile, the adoption of the LEDs can drive the change in technology and even the design style of the automobiles; the LED car lamp functional circuit is an important component of car lighting, and provides important guarantee in the aspect of safe driving of a car; however, when one of the lamp beads of the existing vehicle lamps is damaged, the alarm cannot be given immediately.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem that can not report to the police immediately when solving one of them lamp pearl of current many car lights and damaging, provides a car light control module.

The utility model adopts the technical proposal that:

a vehicle lamp control module comprising:

the control signal input end is connected with the controller and the first switch circuit and is used for controlling the car lamp circuit to work;

the alarm signal output end, car light circuit connection has unusual alarm circuit, when the lamp pearl was not bright when the car light circuit, unusual alarm circuit exports alarm signal and gives the controller.

Further, the first switch circuit comprises a triode QD2, a resistor RD4, a resistor RQ2, a resistor RD6 and a MOS transistor TM2, the base of the triode QD2 is connected with the control signal input end through a resistor RD4, the base of the triode QD2 is also grounded through the resistor RQ2, the emitter of the triode QD2 is grounded, the collector of the triode QD2 is connected with the gate of the MOS transistor TM2 through a resistor RD6, the source of the MOS transistor TM2 is connected with a power supply VCC, and the drain of the MOS transistor TM2 is connected with the lamp circuit.

Further, the abnormality warning circuit includes:

the first signal amplification circuit is connected with the car lamp circuit, the LED current setting circuit and the second switch circuit;

the LED current setting circuit is used for setting the current of a vehicle lamp circuit connected with the first signal amplifying circuit;

and the second switching circuit controls the output current of the LED current setting circuit according to the output signal of the first signal amplifying circuit and is used for transmitting an alarm signal to the controller.

Further, the first signal amplifying circuit comprises a triode DMN2, a resistor RN1, a resistor RN2 and a resistor RN3, wherein the base of the triode DMN2 is respectively connected with the headlight circuit and the LED current setting circuit through a resistor RN1, the base of the triode DMN2 is grounded through a resistor RN2, the emitting stage of the triode DMN2 is grounded, and the collector of the triode DMN2 is connected with the output end of the first switching circuit through a resistor RN 3.

Further, the LED current setting circuit includes a sampling resistor R16 and a transistor Q10 connected in series with the resistor R16, a base of the transistor Q10 is connected to the second switch circuit, an emitter of the transistor Q10 is grounded via a resistor R16, and a collector of the transistor Q10 is connected to the first signal amplifying circuit.

Further, the car lamp control module comprises three LED current setting circuits, and the three LED current setting circuits are connected in parallel.

Further, the second switch circuit comprises an alarm signal output circuit and an LED output current control circuit, and the alarm signal output circuit and the LED output current control circuit are both connected with the base of the triode Q10.

Further, the alarm signal output circuit comprises a triode Q7, a triode Q8, a resistor R11, a resistor R13, a resistor RB1 and a resistor RB2, the base electrode of the triode Q7 is connected with the collector electrode of the triode Q8, the collector electrode of the triode Q8 is connected with the base electrode of the triode Q10 through a resistor R11 and a resistor R13, the collector electrode of the triode Q7 is connected with the controller after passing through a series voltage division circuit consisting of a resistor RB1 and a resistor RB2, and the emitter electrodes of the triode Q7 and the triode Q8 are grounded.

Further, the LED output current control circuit includes a transistor Q9 and a capacitor CN1, a collector of the transistor Q9 is connected to a base of the transistor Q10, a base of the transistor Q9 is grounded via a capacitor CN1, and an emitter of the transistor Q9 is grounded.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a well car light is bright and is gone out by the controller control, when the controller outputs high level signal, then the car light is bright; when the controller outputs a low level signal, the vehicle lamp is not on; if one LED fails, the abnormal alarm circuit feeds the failure back to the controller for error reporting to remind a driver, so that the problem that one LED of a plurality of vehicle lamps is damaged and cannot give an alarm immediately in the prior art is solved, and meanwhile, the abnormal alarm circuit can realize the function that all LED lamps in the module are turned off;

2. the utility model discloses when the controller does not output control signal, car light control module quiescent current is 0, the utility model discloses have very big advantage in the aspect of the automobile body energy consumption.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a circuit diagram of a car light control module provided by the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 shows a circuit diagram of a vehicle lamp control module provided in this embodiment, where the vehicle lamp control module includes a control signal input terminal and an alarm signal output terminal, specifically, the control signal input terminal is connected to a controller and a first switch circuit, and is used to control a vehicle lamp circuit to operate, and when the controller outputs a high level signal, a vehicle lamp is turned on; when the controller outputs a low level signal, the vehicle lamp is not on; if one LED in the car lamp circuit has a fault, the abnormity warning circuit extinguishes all the LED lamps in the module, and simultaneously feeds the fault back to the controller for error reporting to remind a driver of paying attention.

As a specific example of the first switch circuit in this embodiment, the first switch circuit includes a transistor QD2, a resistor RD4, a resistor RQ2, a resistor RD6, and a MOS transistor TM2, a base of the transistor QD2 is connected to the control signal input terminal through a resistor RD4, a base of the transistor QD2 is further connected to the ground through a resistor RQ2, an emitter of the transistor QD2 is connected to the ground, a collector of the transistor QD2 is connected to a gate of the MOS transistor TM2 through a resistor RD6, a source of the MOS transistor TM2 is connected to a power VCC, a drain of the MOS transistor TM2 is connected to the lamp circuit, and when a high level signal is provided to the control signal input terminal (FS-Back terminal) by the controller, a switch of the MOS transistor TM2 is turned on, so that the LED lamp of the circuit operates normally.

Specifically, the controller in this embodiment may be arranged in the car light control module, or may be an MCU of another module, which is not limited to this.

Further, in order to make the vehicle lamp module work better, the present embodiment further provides a diode D1, an anode of the diode D1 is connected to the drain of the MOS transistor TM2, a cathode of the diode D1 is connected to the LED lamp, and the diode D1 prevents reverse current.

Further, in order to make the present embodiment work better, the present embodiment further provides a filter circuit between the VCC terminal of the power supply and the first switch circuit, so as to filter the power supply signal at the VCC terminal.

Specifically, the power supply of the VCC end is provided by the automobile storage battery.

Further, in the present embodiment, in order to protect the lamp control circuit from the transient voltage and ESD, a TVS transistor T1 is disposed between the VCC terminal and the first switch circuit.

Further, the abnormality warning circuit includes:

Specifically, the first signal amplification circuit comprises a triode DMN2, a resistor RN1, a resistor RN2 and a resistor RN3, wherein the base of the triode DMN2 is respectively connected with the headlight circuit and the LED current setting circuit through a resistor RN1, the base of the triode DMN2 is grounded through a resistor RN2, the emitting stage of the triode DMN2 is grounded, and the collector of the triode DMN2 is connected with the output end of the first switch circuit through a resistor RN 3.

Further, the LED current setting circuit includes a sampling resistor R16 and a transistor Q10 connected in series with the resistor R16, a base of the transistor Q10 is connected to the second switch circuit, an emitter of the transistor Q10 is grounded via a resistor R16, a collector of the transistor Q10 is connected to the first signal amplifying circuit, in this embodiment, a collector current value of the transistor DMN2 is set by the sampling resistor R16, and the collector current value of the transistor DMN2 is a current flowing through the LED.

Further, the car lamp control module comprises three LED current setting circuits which are connected in parallel, and the number of the LED current setting circuits can be increased according to the requirement, so that the purpose of adjusting the collector current value of the triode DMN2 is achieved.

The working principle of the embodiment is as follows:

as shown in fig. 1, in this embodiment, the VCC terminal is directly powered by the storage battery, and is filtered by the filter circuit, when the controller outputs a high level signal to the FS-Back terminal, the MOS transistor TM2 is turned on, and the LED lamps (LB1 to LB3) operate normally;

when the LED lamps (LB 1-LB 3) normally work, the triode DMN2 and the triode DMN3 are conducted, the N-1-Back up end outputs low level, and the triode Q9 and the triode Q8 are not conducted, so that the FB-Back up end outputs low level, and the controller does not report errors;

if one LED lamp fails (assuming that LB2 is not bright), the triode DMN2 is turned off, so that N-1-Back up outputs high level, at the moment, the triode Q9 and the triode Q8 are turned on, the base level of the triodes Q10-Q15 is lowered, so that the triodes Q10-Q15 are turned off, and the LED lamp is completely turned off, so that the N-1 function is realized;

meanwhile, as the triode Q9 is conducted, the base level of the triode Q7 is pulled down, the triode Q7 is cut off at the moment, the FB-back up end outputs high level, and a fault is fed back to the controller to report errors, so that the fault feedback function is realized.

To sum up, the utility model provides a car light control module damages at one of them LED of car light and can extinguishes all LED lamps in the module to report to the police and remind the navigating mate to notice, can improve the driving safety nature.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims

1. A vehicle lamp control module, comprising:

2. The vehicle lamp control module according to claim 1, wherein the first switch circuit comprises a transistor QD2, a resistor RD4, a resistor RQ2, a resistor RD6 and a transistor MOS TM2, a base of the transistor QD2 is connected to the control signal input terminal through a resistor RD4, a base of the transistor QD2 is further grounded through a resistor RQ2, an emitter of the transistor QD2 is grounded, a collector of the transistor QD2 is connected to a gate of the transistor MOS 2 through a resistor RD6, a source of the transistor MOS TM2 is connected to a power source VCC, and a drain of the transistor TM2 is connected to the vehicle lamp circuit.

3. The vehicle lamp control module of claim 1, wherein the anomaly warning circuit comprises:

4. The vehicle lamp control module according to claim 3, wherein the first signal amplifying circuit comprises a transistor DMN2, a resistor RN1, a resistor RN2 and a resistor RN3, a base of the transistor DMN2 is connected to the vehicle lamp circuit and the LED current setting circuit through a resistor RN1, a base of the transistor DMN2 is grounded through a resistor RN2, an emitting stage of the transistor DMN2 is grounded, and a collector of the transistor DMN2 is connected to the output terminal of the first switching circuit through a resistor RN 3.

5. The car light control module of claim 3, wherein the LED current setting circuit comprises a sampling resistor R16 and a transistor Q10 connected in series with the resistor R16, the base of the transistor Q10 is connected to the second switching circuit, the emitter of the transistor Q10 is grounded via a resistor R16, and the collector of the transistor Q10 is connected to the first signal amplifying circuit.

6. The vehicle light control module of claim 5, wherein the vehicle light control module includes three LED current setting circuits connected in parallel.

7. The car light control module of claim 5, wherein the second switch circuit comprises an alarm signal output circuit and an LED output current control circuit, and the alarm signal output circuit and the LED output current control circuit are both connected to the base of the transistor Q10.

8. The vehicle lamp control module according to claim 7, wherein the alarm signal output circuit comprises a transistor Q7, a transistor Q8, a resistor R11, a resistor R13, a resistor RB1 and a resistor RB2, a base of the transistor Q7 is connected to a collector of the transistor Q8, a collector of the transistor Q8 is connected to a base of the transistor Q10 through a resistor R11 and a resistor R13, a collector of the transistor Q7 is connected to the controller through a series voltage dividing circuit consisting of a resistor RB1 and a resistor RB2, and emitters of the transistor Q7 and the transistor Q8 are grounded.

9. The car light control module of claim 7, wherein the LED output current control circuit comprises a transistor Q9 and a capacitor CN1, a collector of the transistor Q9 is connected to a base of the transistor Q10, a base of the transistor Q9 is grounded via a capacitor CN1, and an emitter of the transistor Q9 is grounded.