Vehicle light switching device and vehicle having the same

Abstract

The present invention discloses a headlight switching device and a vehicle having the same. The headlight switching device comprises: a detection circuit, the detection circuit is used to detect the working state of a first headlight and output a state signal indicating the working state of the first headlight; a controller, the controller is used to output a control signal according to the state signal, the controller has a signal input terminal for receiving the state signal, and a signal output terminal for outputting the control signal; a control circuit, the control circuit is electrically connected to the controller and the second headlight, and is used to receive the control signal and control the working state of the second headlight according to the control signal. According to the headlight switching device of the embodiment of the present invention, the circuit switching of the first headlight and the second headlight can be realized by using simple components through the cooperation of the detection circuit, the controller and the control circuit, thereby switching the working states of the first headlight and the second headlight. The headlight switching device has a simple structure, is easy to realize, and has low cost.

Description

Technical Field

[0001] The present invention relates to the field of vehicle lamp lighting, and more particularly to a vehicle lamp switching device and a vehicle having the vehicle lamp switching device. Background Art

[0002] Since my country entered the era of market economy, the automobile industry has undergone significant changes. Both the production and sales volume and the speed and variety of the products put on the market have accelerated, accompanied by increasingly fierce competition. The lighting system on the car not only allows the driver to actually understand the condition of the car, but also provides the necessary conditions for safe driving. The new generation of light source - LED, is not unfamiliar to many consumers, and has even been further expanded to be used in automobiles. According to the different performance requirements of various applications, suitable LED products are selected.

[0003] LED is a field-effect luminous light source, a semiconductor device that directly converts electrical energy into light energy. LEDs can be combined into LED arrays in different ways, such as in series or in parallel, to meet the requirements of automotive lighting intensity. In view of the luminous characteristics of LEDs, the design of LED drivers should meet the requirements of vehicle lighting safety regulations. In terms of vehicle lighting regulations, a regulation closely related to LEDs is to meet lighting requirements. In vehicle lighting applications, there is a phenomenon that reversing lights and dynamic turn signals share the same luminous surface. If they are lit at the same time, the light will be mixed and the luminous flux will not meet the requirements. Therefore, different function switching methods are often used to achieve lighting needs. At present, most of the designs for different function switching methods are hardware switching, which has many components, complex structures, and is difficult to implement, and the cost is high. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, the present invention provides a vehicle light switching device, which has a simple structure, is easy to implement and has low cost.

[0006] The present invention also provides a vehicle having the above-mentioned vehicle light switching device.

[0007] According to the first aspect of the present invention, the headlight switching device includes: a detection circuit, which is used to detect the working state of a first headlight and output a status signal indicating the working state of the first headlight; a controller, which is used to output a control signal according to the status signal, and the controller has a signal input terminal for receiving the status signal and a signal output terminal for outputting the control signal; a control circuit, which is electrically connected to the controller and the second headlight, and is used to receive the control signal and control the working state of the second headlight according to the control signal.

[0008] According to the headlight switching device of the embodiment of the present invention, the circuit switching of the first headlight and the second headlight can be realized by using simple components through the cooperation of the detection circuit, the controller and the control circuit, thereby switching the working states of the first headlight and the second headlight. The headlight switching device has a simple structure, is easy to implement, and has low cost.

[0009] According to an embodiment of the present invention, the first vehicle light is a reversing light, and the second vehicle light is a turn signal light.

[0010] According to one embodiment of the present invention, the headlight switching device further includes: a voltage stabilizing circuit having a voltage input terminal and a voltage output terminal, wherein the voltage output terminal is electrically connected to the controller to provide an operating voltage to the controller, and the voltage input terminal is connected to the circuit of the second headlight to receive an input voltage when the circuit of the second headlight is powered on.

[0011] According to one embodiment of the present invention, the detection circuit includes: a first resistor having a first end connected to the driving circuit of the first vehicle light and a second end opposite to the first end; a second resistor having a ground end and a signal end electrically connected to the second end of the first resistor and a signal input end of the controller; and a voltage regulator connected in parallel with the second resistor.

[0012] According to one embodiment of the present invention, the control circuit includes: a switch subcircuit, which is electrically connected to the signal output end of the controller and controls its own switch state according to the control signal; a control subcircuit, which is electrically connected to the switch subcircuit and turns on the working voltage of the second headlight when the switch subcircuit is in the on state to enable the second headlight to work.

[0013] According to an embodiment of the present invention, the switch sub-circuit includes: a high-level conduction transistor and a current-limiting resistor having one end connected to the high-level conduction transistor and the other end connected to the signal output terminal of the controller.

[0014] According to one embodiment of the present invention, the control subcircuit includes: a first voltage-dividing resistor, one of whose two ends is connected to the high-level conduction transistor; a second voltage-dividing resistor, one of whose two ends is electrically connected to the other of the two ends of the first voltage-dividing resistor; a PMOS tube, a gate of which is connected to the other of the two ends of the first voltage-dividing resistor, a drain of which is connected to the other of the two ends of the second voltage-dividing resistor, and a source of which is connected to the positive electrode of the second headlight.

[0015] A vehicle according to an embodiment of the second aspect of the present invention comprises the vehicle light switching device according to the above embodiment.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of a module of a vehicle light switching device according to an embodiment of the present invention;

[0019] Figure 2 is a circuit diagram of a vehicle light switching device according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] A vehicle light switching device 100; a first vehicle light 200; a second vehicle light 300;

[0022] Detection circuit 10; controller 20; signal input terminal 21; signal output terminal 22; control circuit 30; voltage stabilizing circuit 40. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] First, the vehicle light switching device 100 according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, the vehicle light switching device 100 according to the embodiment of the present invention includes: a detection circuit 10 , a controller 20 and a control circuit 30 .

[0028] Specifically, the detection circuit 10 is used to detect the working state of the first headlight 200 and output a state signal indicating the working state of the first headlight 200. The controller 20 is used to output a control signal according to the state signal. The controller 20 has a signal input terminal for receiving the state signal and a signal output terminal for outputting the control signal. The control circuit 30 is electrically connected to the controller 20 and the second headlight 300 and is used to receive the control signal and control the working state of the second headlight 300 according to the control signal.

[0029] In other words, the vehicle light switching device 100 according to the embodiment of the present invention mainly consists of three parts: a detection circuit 10, a controller 20 and a control circuit 30. The detection circuit 10 is electrically connected to the first vehicle light 200. The detection circuit 10 can detect the working state of the first vehicle light 200 and send the working state of the first vehicle light 200 in the form of a state signal. The controller 20 has a signal input terminal 21 and a signal output terminal 22. The signal input terminal 21 can be Figure 2 Pin 9 of U2, signal output terminal 22 can be Figure 2 The pin 6 of the U2 part, the signal input terminal 21 can receive the state signal sent by the detection circuit 10, the controller 20 can output the control signal according to the received state signal, and the signal output terminal 22 can output the control signal sent by the controller 20, wherein the controller 20 can be a single chip microcomputer. The control circuit 30 is electrically connected to the second headlight 300, and the control circuit 30 can receive the control signal sent by the controller 20, and control the working state of the second headlight 300 according to the control signal.

[0030] Therefore, according to the vehicle light switching device 100 of the embodiment of the present invention, through the cooperation of the detection circuit 10, the controller 20 and the control circuit 30, simple components can be used to realize the circuit switching of the first vehicle light 200 and the second vehicle light 300, thereby switching the working states of the first vehicle light 200 and the second vehicle light 300. The vehicle light switching device 100 has a simple structure, is easy to implement, has a flexible control method, and is low in cost.

[0031] According to an embodiment of the present invention, the first vehicle lamp 200 is a reversing lamp, and the second vehicle lamp 300 is a turn lamp. That is, the vehicle lamp switching device 100 according to the embodiment of the present invention can conveniently realize the switching between the reversing lamp and the dynamic turn lamp.

[0032] In some specific embodiments of the present invention, the vehicle light switching device 100 further includes: a voltage stabilizing circuit 40, the voltage stabilizing circuit 40 having a voltage input terminal and a voltage output terminal, the voltage output terminal being electrically connected to the controller 20 to provide an operating voltage to the controller 20, and the voltage input terminal being connected to the circuit of the second vehicle light 300 to receive an input voltage when the circuit of the second vehicle light 300 is powered on. Thus, by providing the voltage stabilizing circuit 40, the voltage stability in the overall circuit of the vehicle light switching device 100 can be achieved.

[0033] like Figure 2 As shown, the detection circuit 10 according to the embodiment of the present invention may include: a first resistor, a second resistor and a voltage stabilizer.

[0034] Specifically, the first resistor can be Figure 2 The first resistor R69 in the embodiment has a first end connected to the driving circuit of the first lamp 200 and a second end opposite to the first end. The second resistor may be Figure 2 In R70, the second resistor has a ground terminal and a signal terminal for electrically connecting the second terminal of the first resistor and the signal input terminal of the controller 20. The voltage regulator may be Figure 2 In TD2, the regulator is connected in parallel with the second resistor.

[0035] According to an embodiment of the present invention, the control circuit 30 includes: a switch subcircuit and a control subcircuit. The switch subcircuit is electrically connected to the signal output terminal of the controller 20 and controls its own switch state according to the control signal. The control subcircuit is electrically connected to the switch subcircuit and conducts the operating voltage of the second headlight 300 when the switch subcircuit is in the on state to make the second headlight 300 work.

[0036] In some specific embodiments of the present invention, the switch subcircuit includes: a high-level conduction transistor and a current-limiting resistor having one end connected to the high-level conduction transistor and the other end connected to the signal output terminal of the controller 20 .

[0037] In addition, the control subcircuit includes: a first voltage-dividing resistor, a second voltage-dividing resistor and a PMOS tube. Specifically, one end of the first voltage-dividing resistor is connected to the high-level conduction transistor, one end of the second voltage-dividing resistor is electrically connected to the other end of the first voltage-dividing resistor, the gate of the PMOS tube is connected to the other end of the first voltage-dividing resistor, the drain is connected to the other end of the second voltage-dividing resistor, and the source is connected to the positive electrode of the second vehicle lamp 300.

[0038] In other words, the vehicle light switching device 100 according to the embodiment of the present invention utilizes a combination of software and hardware to realize the switching of the reversing lights and the dynamic turn lights. In actual applications, the reversing lights have a higher priority than the dynamic turn lights. When the dynamic turn lights are working, the MCU detects the reversing light signal and outputs high and low levels to control the shutdown of the PMOS tube connected in series to the positive electrode of the turn light, thereby realizing the switching of the reversing lights and the dynamic turn lights.

[0039] Among them, the dynamic turn signal can be controlled by the voltage regulator chip and the MCU chip, the fault feedback signal of the dynamic turn signal can be a low-level feedback signal, and the positive conduction of the dynamic turn signal can be controlled by the PMOS tube. The positive input of the turn signal is stabilized by the U1 voltage regulator chip to provide the working voltage to U2. When the turn signal works normally, the transistor Q9 does not work. At N-1, Q9 is turned on and the fault feedback output is low. The drain of the PMOS tube DQ1 is connected to the output of the anti-reverse diode, the source is connected to the positive pole of the turn signal LED, and the gate is controlled by the high and low levels output by U2.

[0040] Combine the following Figure 2 The working principle of the vehicle light switching device 100 according to the present invention is described in detail.

[0041] like Figure 2 As shown, Figure 2 1 is an overall circuit diagram of the vehicle light switching device 100. It should be noted that, in this embodiment, the first vehicle light is a reverse light, and the second vehicle light is a dynamic turn signal light. Figure 2 In the circuit diagram shown, except for the resistors, PMOS tubes, controllers and other structures mentioned in the above embodiments, the remaining resistors, diodes, capacitors and other circuits and connection relationships are understandable and easy to implement by those skilled in the art, and therefore will not be described in detail.

[0042] When the vehicle light switching device 100 according to the embodiment of the present invention is working, the reverse light is powered on, and after voltage division and current limiting by R69 and R70, the voltage output by the voltage stabilizing diode TD2 is 3.3V, and the 9th pin of U2 detects a high level. The dynamic turn signal is powered on, and after voltage stabilization by U1, 5V is output to the single-chip microcomputer. The single-chip microcomputer U2 works normally, and is initialized first. After the initialization is completed, the voltage of the 9th pin is detected. If it is a high level, the 6th pin of U2 outputs a low level, and the 6th pin is connected to the base of the transistor Q10 through the current limiting resistor R4. When the base of the transistor is at a low level, Q10 does not work, the voltage of the gate and drain of DQ1 is about 0V, DQ1 does not turn on, T-VIN+ has no electricity, and the LED of the turn signal does not light up. If the reversing light is not powered on, the voltage at pin 9 of U1 is low, and pin 6 outputs a high level. At this time, Q10 works, and the collector of Q10 is short-circuited to the ground. 13.5V is divided by R2 and R3. The voltage on R2 is equal to the voltage of the gate and drain of DQ1, which is about 11.5V. DQ1 is turned on, T-VIN+ has power, and the LED of the turn signal works, thereby realizing the switching between the reversing light and the dynamic turn signal.

[0043] In summary, according to the headlight switching device 100 of the embodiment of the present invention, through the cooperation of the detection circuit 10, the controller 20 and the control circuit 30, simple components can be used to realize the circuit switching of the first headlight 200 and the second headlight 300, thereby switching the working states of the first headlight 200 and the second headlight 300. The headlight switching device 100 has a simple structure, is easy to implement, has a flexible control method, and is low cost.

[0044] The vehicle according to the embodiment of the present invention includes the headlight switching device 100 according to the above embodiment. Since the headlight switching device 100 according to the above embodiment of the present invention has the above technical effects, the vehicle according to the embodiment of the present invention also has the corresponding technical effects, that is, the circuit switching structure of the turn signal light and the reversing light is simple, easy to implement, flexible in control method, and low in cost.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vehicle light switching device, characterized in that: include: a detection circuit, the detection circuit being used to detect the working state of the first headlight and output a state signal indicating the working state of the first headlight; A controller, the controller is used to output a control signal according to the state signal, the controller has a signal input terminal for receiving the state signal, and a signal output terminal for outputting the control signal; a control circuit, the control circuit being electrically connected to the controller and the second headlight, and configured to receive the control signal and control the working state of the second headlight according to the control signal; The detection circuit comprises: a first resistor, the first resistor having a first end connected to the driving circuit of the first vehicle lamp and a second end opposite to the first end; a second resistor, the second resistor having a ground terminal and a signal terminal for electrically connecting to the second terminal of the first resistor and the signal input terminal of the controller; a voltage stabilizer, the voltage stabilizer being connected in parallel with the second resistor; The control circuit comprises: a switch subcircuit, the switch subcircuit being electrically connected to the signal output terminal of the controller and controlling its own switch state according to the control signal; A control subcircuit is electrically connected to the switch subcircuit and conducts the operating voltage of the second headlight to operate the second headlight when the switch subcircuit is in an on state.

2. The vehicle light switching device according to claim 1, characterized in that: The first headlight is a reversing light, and the second headlight is a turn signal light.

3. The vehicle light switching device according to claim 1, characterized in that: Also includes: A voltage stabilizing circuit, wherein the voltage stabilizing circuit has a voltage input terminal and a voltage output terminal, wherein the voltage output terminal is electrically connected to the controller to provide an operating voltage to the controller, and the voltage input terminal is connected to the circuit of the second headlight to receive an input voltage when the circuit of the second headlight is powered on.

4. The vehicle light switching device according to claim 1, characterized in that: The switch subcircuit comprises: a high-level conduction transistor and a current-limiting resistor having one end connected to the high-level conduction transistor and the other end connected to the signal output end of the controller.

5. The vehicle light switching device according to claim 4, characterized in that: The control subcircuit comprises: A first voltage-dividing resistor, one end of which is connected to the high-level conducting transistor; a second voltage-dividing resistor, one end of the second voltage-dividing resistor being electrically connected to the other end of the first voltage-dividing resistor; A PMOS tube, wherein a gate of the PMOS tube is connected to the other end of the two ends of the first voltage-dividing resistor, a drain is connected to the other end of the two ends of the second voltage-dividing resistor, and a source is connected to the positive electrode of the second vehicle lamp.

6. A vehicle, characterized in that: The invention comprises the vehicle light switching device according to any one of claims 1 to 5.

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