Rectified triode amplification vehicle lamp circuit, vehicle lamp and vehicle

Abstract

The utility model relates to the technical field of vehicle lamp circuits, in particular to a rectified triode amplification vehicle lamp circuit, a vehicle lamp and a vehicle. A rectified triode amplification car lamp circuit comprises a direct current power supply; the input filtering module is connected with the output end of the direct-current power supply; the inversion rectification module comprises an inverter and a rectification unit, the input end of the inverter is connected with a direct current power supply, and the rectification unit rectifies alternating current output by the inverter into direct current; the power supply input end of the triode amplification circuit module is connected with the output ends of the input filtering module and the inversion rectification module respectively; and the LED lamp panel module is connected with the output end of the triode amplification circuit module and is driven by the amplified electric signal to emit light. According to the circuit, after alternating current is rectified, sine-wave-like light and shade changes of the automobile lamp are achieved through the triode amplifying circuit, the circuit is simple and low in cost, and reasons are easy to find when the circuit goes wrong.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting circuit technology, and in particular to a rectified transistor amplified automotive lighting circuit, automotive lighting, and vehicle. Background Technology

[0002] In existing technologies, to achieve simple control of vehicle lights, such as to achieve changes in headlight brightness, chips such as MCUs are typically used. For more complex headlight brightness changes, chip control works well. However, for simple headlight brightness changes, such as achieving a sine wave-like brightness variation, different chips are still used for control, resulting in more complex circuitry, higher costs, and difficulty in identifying the cause of problems. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the problem in the above-mentioned background technology that the existing control circuits for some simple changes in the brightness of car lights are complex, costly, and difficult to detect when problems occur, a rectified transistor amplification car light circuit is provided. The AC power is rectified and then amplified by the transistor circuit to realize the changes in brightness of the car lights similar to a sine wave. The circuit is simple, low in cost, and the cause of any problems is easy to find.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a rectified transistor amplification vehicle lamp circuit, comprising:

[0005] DC power supply;

[0006] The input filter module is connected to the output terminal of the DC power supply.

[0007] An inverter-rectifier module includes an inverter and a rectifier unit. The input terminal of the inverter is connected to a DC power supply, and the rectifier unit rectifies the AC power output by the inverter into DC power.

[0008] The power input terminal of the transistor amplifier circuit module is connected to the output terminals of the input filter module and the inverter rectifier module, respectively.

[0009] The LED light board module is connected to the output of the transistor amplifier circuit module and is driven to emit light by the amplified electrical signal.

[0010] As an embodiment of this utility model, the input filtering module includes a TVS diode D1, a capacitor C1, a capacitor C2, and a diode D2. The cathode of the TVS diode D1 is connected to the positive terminal of the DC power supply, and its anode is grounded. The capacitors C1 and C2 are connected in parallel and then connected across the positive and negative terminals of the DC power supply. The anode of the diode D2 is connected to the positive terminal of the DC power supply, and its cathode outputs a DC voltage to the transistor amplifier circuit module.

[0011] In one embodiment of this utility model, the rectifier unit is a single-phase bridge rectifier circuit, including diodes D3, D4, D5 and D6. The anode of diode D3 is connected to the cathode of diode D5 and serves as the first AC input terminal. The anode of diode D4 is connected to the cathode of diode D6 and serves as the second AC input terminal. The cathodes of diodes D3 and D4 are connected together to form the positive terminal of the rectifier output, and the anodes of diodes D5 and D6 are connected together to form the negative terminal of the rectifier output.

[0012] As one embodiment of this utility model, the transistor amplifier circuit module is a common-base amplifier circuit, and its collector is connected to the LED light board module.

[0013] As an embodiment of this utility model, the transistor amplifier circuit module includes resistors R1 and R2, transistor Q1, resistors R3, R4, and R5. The emitter of transistor Q1 is connected to the positive terminal of the rectified output through resistor R1, the base of transistor Q1 is connected to the negative terminal of the rectified output through resistor R3, and is connected to the DC voltage output by the input filter module through resistor R2; the collector of transistor Q1 is connected to the DC voltage output by the input filter module through resistor R4, and is connected to the negative terminal of the rectified output through resistor R5.

[0014] As one embodiment of this utility model, the LED light board module includes a plurality of LED lights connected in series, and a filter capacitor is connected in parallel across the two ends of each LED light.

[0015] In one embodiment of this utility model, the DC power supply is a vehicle battery, and a reverse connection protection diode is connected in series at its output terminal. The cathode of the reverse connection protection diode is connected to the input filter module.

[0016] As an embodiment of this utility model, the input filtering module further includes an inductor connected in series at the cathode output terminal of diode D2.

[0017] Another vehicle lamp is provided, including the rectified transistor amplified vehicle lamp circuit described in the above solution.

[0018] A vehicle is also provided, including at least one of the above-described headlights.

[0019] The beneficial effects of this utility model are as follows: The circuit of this utility model provides a suitable static operating point for the transistor amplifier circuit module through the DC power supply and input filter module. The AC signal obtained by the inverter is rectified by the single-phase bridge rectifier circuit (rectifier unit) and then amplified by the transistor amplifier circuit module to power the LED light board module, so that the brightness of the LEDs on the LED light board module changes, realizing dimming without MCU. The method is novel, the circuit is simple, the cost is low, and the cause of circuit problems is easy to find. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a principle block diagram of Embodiment 1 of this utility model.

[0022] Figure 2 This is a circuit diagram of the input filtering module in Embodiment 1 of this utility model.

[0023] Figure 3 This is a circuit diagram of the inverter rectifier module and the transistor amplifier circuit module in Embodiment 1 of this utility model.

[0024] Figure 4 This is a circuit diagram of the LED light board module in Embodiment 1 of this utility model.

[0025] In the diagram: 1. DC power supply; 2. Input filter module; 3. Inverter rectifier module; 31. Inverter; 32. Rectifier unit; 4. Transistor amplifier circuit module; 5. LED light board module. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] Example 1

[0028] like Figure 1 As shown, a rectified transistor amplification vehicle light circuit includes a DC power supply 1, an input filter module 2, an inverter rectifier module 3, a transistor amplifier circuit module 4, and an LED light board module 5. The input filter module 2 is connected to the output terminal of the DC power supply 1. The inverter rectifier module 3 includes an inverter 31 and a rectifier unit 32. The input terminal of the inverter 31 is connected to the DC power supply 1, and the rectifier unit 32 rectifies the AC power output from the inverter 31 into DC power. The power input terminal of the transistor amplifier circuit module 4 is connected to the output terminals of the input filter module 2 and the inverter rectifier module 3, respectively. The LED light board module 5 is connected to the output terminal of the transistor amplifier circuit module 4 and is driven to emit light by the amplified electrical signal. The DC power supply 1 is a vehicle battery. Preferably, a reverse connection protection diode is connected in series at the output terminal of the DC power supply 1, and the cathode of the reverse connection protection diode is connected to the input filter module 2 to protect the circuit from damage caused by reverse connection.

[0029] like Figure 2As shown, the input filter module 2 includes a TVS diode D1, capacitors C1 and C2, and a diode D2. The cathode of the TVS diode D1 is connected to the positive terminal of the DC power supply 1, and its anode is grounded. Capacitors C1 and C2 are connected in parallel across the positive and negative terminals of the DC power supply 1. The anode of the diode D2 is connected to the positive terminal of the DC power supply 1, and its cathode outputs a DC voltage to the transistor amplifier circuit module 4. The TVS diode D1 suppresses input surge voltage and current, capacitors C1 and C2 act as filters, and the diode D2 is used for rectification. Preferably, the input filter module 2 also includes an inductor connected in series at the cathode output terminal of the diode D2 to suppress high-frequency noise.

[0030] like Figure 3 As shown, the rectifier unit 32 is a single-phase bridge rectifier circuit, including diodes D3, D4, D5 and D6. The anode of diode D3 is connected to the cathode of diode D5 and serves as the first AC input terminal. The anode of diode D4 is connected to the cathode of diode D6 and serves as the second AC input terminal. The cathodes of diodes D3 and D4 are connected together to form the positive terminal of the rectified output, and the anodes of diodes D5 and D6 are connected together to form the negative terminal of the rectified output.

[0031] Transistor amplifier circuit module 4 is a common-base amplifier circuit, with its collector connected to LED light board module 5. Transistor amplifier circuit module 4 includes resistors R1 and R2, transistor Q1, resistors R3, R4, and R5. The emitter of transistor Q1 is connected to the positive terminal of the rectified output through resistor R1, and the base of transistor Q1 is connected to the negative terminal of the rectified output through resistor R3, and to the DC voltage output from input filter module 2 through resistor R2. The collector of transistor Q1 is connected to the DC voltage output from input filter module 2 through resistor R4, and to the negative terminal of the rectified output through resistor R5.

[0032] During the positive half-cycle of the alternating current, diodes D3 and D5 are turned on, while diodes D4 and D6 are turned off. The alternating current returns to the negative terminal through diode D3, resistor R1, and diode D5. During the negative half-cycle of the alternating current, diodes D4 and D6 are turned on, while diodes D3 and D5 are turned off. The alternating current returns to the positive terminal through diode D4, resistor R1, and diode D6.

[0033] The rectified AC power serves as the input to the common-base amplifier circuit. The emitter current of transistor Q1 changes with the input signal, and this change in emitter current causes a change in collector current. The collector current generates an output voltage through resistor R5, thereby amplifying the signal. The filtered DC power is connected to the base and collector of transistor Q1, causing Q1 to operate in the amplification region: the emitter is forward biased, and the collector is reverse biased. The output DC voltage of input filter module 2 and resistor R2 together determine the base quiescent current of transistor Q1, while the output DC voltage of input filter module 2 and resistor R4 together determine the collector quiescent current.

[0034] like Figure 4 As shown, the LED light board module 5 includes several LEDs connected in series, and a filter capacitor is connected in parallel across the two ends of each LED to decouple it.

[0035] The working principle of the entire circuit is as follows: DC power supply 1 provides a suitable static operating point to transistor amplifier circuit module 4 through input filter module 2. The AC signal obtained by inverter 31 is rectified by single-phase bridge rectifier circuit (rectifier unit 32) and then amplified by transistor amplifier circuit module 4 to power LED light board module 5, so that the brightness of LED lights on LED light board module 5 changes, realizing dimming without MCU.

[0036] Example 2

[0037] A vehicle lamp includes a rectified transistor amplified vehicle lamp circuit as described in Embodiment 1.

[0038] Example 3

[0039] A vehicle including the headlights of Embodiment 2.

[0040] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A rectified triode amplifier headlamp circuit, characterized by, The application relates to a rectified triode amplification car lamp circuit. The rectified triode amplification car lamp circuit comprises a direct-current power supply (1), an input filter module (2) connected with the output end of the direct-current power supply, an inverter rectification module (3) comprising an inverter (31) and a rectification unit (32), wherein the input end of the inverter (31) is connected with the direct-current power supply (1), the rectification unit (32) rectifies alternating current output by the inverter (31) into direct current, a triode amplification circuit module (4) whose power input ends are connected with the output ends of the input filter module (2) and the inverter rectification module (3) respectively, and an LED lamp plate module (5) connected with the output end of the triode amplification circuit module (4) and driven to emit light by the amplified electric signal. The input filter module (2) comprises a TVS tube D1, a capacitor C1, a capacitor C2 and a diode D2, the cathode of the TVS tube D1 is connected with the anode of the direct-current power supply, and the anode is grounded; the capacitor C1 and the capacitor C2 are connected in parallel and are connected across the positive and negative poles of the direct-current power supply (1), and the anode of the diode D2 is connected with the positive pole of the direct-current power supply (1), and the cathode outputs direct-current voltage to the triode amplification circuit module (4). The rectification unit (32) is a single-phase bridge rectification circuit comprising a diode D3, a diode D4, a diode D5 and a diode D6, the anode of the diode D3 is connected with the cathode of the diode D5 and serves as a first alternating current input end, the anode of the diode D4 is connected with the cathode of the diode D6 and serves as a second alternating current input end, the cathodes of the diode D3 and the diode D4 are commonly connected to form a rectification output positive end, and the anodes of the diode D5 and the diode D6 are commonly connected to form a rectification output negative end. The triode amplification circuit module (4) is a common-base amplification circuit, and the collector thereof is connected with the LED lamp plate module (5). The triode amplification circuit module (4) comprises a resistor R1, a resistor R2, a triode Q1, a resistor R3, a resistor R4 and a resistor R5, the emitter of the triode Q1 is connected with the rectification output positive end through the resistor R1, the base of the triode Q1 is connected with the rectification output negative end through the resistor R3 and is connected with the direct-current voltage output by the input filter module through the resistor R2, the collector of the triode Q1 is connected with the direct-current voltage output by the input filter module (2) through the resistor R4 and is connected with the rectification output negative end through the resistor R5.

2. The rectified triode amplifier vehicle lamp circuit of claim 1, wherein: The LED lamp plate module (5) comprises a plurality of LED lamps connected in series, and each LED lamp is connected with a filter capacitor in parallel at both ends.

3. The rectified triode amplifier vehicle lamp circuit of claim 2, wherein: The direct-current power supply (1) is a vehicle-mounted storage battery, the output end of which is connected with an anti-reverse connection diode in series, and the cathode of the anti-reverse connection diode is connected with the input filter module (2).

4. The rectified triode amplifier vehicle lamp circuit of claim 3, wherein: The input filter module (2) further comprises an inductor connected in series at the cathode output end of the diode D2.

5. The rectified triode amplifier vehicle lamp circuit of claim 4, wherein: The application further provides a rectified triode amplification car lamp circuit comprising the rectified triode amplification car lamp circuit as claimed in any one of claims 1 to 8.

6. The rectified triode amplifier vehicle lamp circuit of claim 1, wherein: The application further provides a car lamp comprising at least one rectified triode amplification car lamp circuit as claimed in claim 9.

7. The rectified triode amplifier vehicle lamp circuit of claim 1, wherein: ​ 8. The rectified triode amplifier vehicle lamp circuit of claim 2, wherein: ​ 9. A vehicle light, characterized by: ​ 10. A vehicle characterized by: ​

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