Lighting driving circuit suitable for car lamp sharing light-emitting surface and car lamp with lighting driving circuit

Abstract

The utility model discloses a lighting drive circuit suitable for a car lamp sharing a light-emitting surface and a car lamp with the lighting drive circuit, the lighting drive circuit comprises a linear drive unit, a first switch unit, a second switch unit, a position lamp unit and a steering lamp unit, the first switch unit is connected with the linear drive unit, and the second switch unit is connected with the steering lamp unit. The second switch unit is connected with the linear driving unit, the position lamp unit is connected with the first switch unit, and the steering lamp unit is connected with the second switch unit. By arranging the first switch unit and the second switch unit, the position lamp unit and the steering lamp unit can share one linear driving unit, the circuit structure can be simplified, and the cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, in particular to a lighting driving circuit suitable for vehicle lamps with a shared light-emitting surface and a vehicle lamp having the same. Background Art

[0002] With the continuous development of vehicle lighting technology, the same luminous surface often needs to switch between multiple colors and different brightness. In order to indicate the presence and width of the vehicle body to oncoming vehicles or rear vehicles, the luminous surface needs to display the position light function, and the luminous surface needs to display the turn signal function to prompt the rear vehicles during driving.

[0003] The existing headlight system has a single function and a single brightness, which can no longer meet the diverse needs of headlights. In addition, the existing headlight system driving solutions are directly divided according to function, with one driver chip driving one lamp function (i.e., one driver chip drives the position light function, and another driver chip drives the turn signal function). The number of driver chips is large and the utilization rate is low, which not only increases the cost, but also increases the complexity of the circuit. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a lighting driving circuit suitable for vehicle lamps with a common light-emitting surface and a vehicle lamp having the same.

[0005] The technical solution adopted by the utility model to solve its technical problem is: a lighting drive circuit suitable for vehicle lights with a common light-emitting surface, comprising: a linear drive unit, a first switch unit, a second switch unit, a position light unit and a turn signal light unit, the first switch unit is connected to the linear drive unit, the second switch unit is connected to the linear drive unit, the position light unit is connected to the first switch unit, and the turn signal light unit is connected to the second switch unit.

[0006] Furthermore, the linear driving unit includes: a driving chip PU1, a bidirectional breakdown diode PT1, a capacitor PC5, a resistor PR9 and a diode PD1, the cathode of the diode PD1 is connected to the driving chip PU1, the bidirectional breakdown diode PT1, the capacitor PC5 and the resistor PR9 are connected in parallel, and one end of the resistor PR9 is connected to the anode of the diode PD1.

[0007] Furthermore, the first switch unit includes: a MOS tube Q1, a resistor PR1 and a resistor PR2, the drain of the MOS tube Q1 is connected to the position light unit, the source of the MOS tube Q1 is grounded, the gate of the MOS tube Q1 is connected to one end of the resistor PR1, one end of the resistor PR2 is connected to the gate of the MOS tube Q1, and the other end of the resistor PR2 is grounded.

[0008] Furthermore, the second switch unit includes: a MOS tube Q2, a resistor PR4 and a resistor PR7, the drain of the MOS tube Q1 is connected to the turn signal unit, the source of the MOS tube Q1 is grounded, the gate of the MOS tube Q1 is connected to one end of the resistor PR4, one end of the resistor PR7 is connected to the gate of the MOS tube Q2, and the other end of the resistor PR7 is grounded.

[0009] Furthermore, the position light unit includes: LED lamp PL1, LED lamp PL2, capacitor PC1 and capacitor PC2, the positive electrode of the LED lamp PL1 is connected to the driving chip PU1, the negative electrode of the LED lamp PL1 is connected to the positive electrode of the LED lamp PL2, the negative electrode of the LED lamp PL2 is connected to the drain of the MOS tube Q1, one end of the capacitor PC1 is connected to the positive electrode of the LED lamp PL1, the other end of the capacitor PC1 is connected to one end of the capacitor PC2, and the other end of the capacitor PC2 is connected to the negative electrode of the LED lamp PL2.

[0010] Furthermore, the turn signal unit includes: an LED lamp TL1, an LED lamp TL2, a capacitor PC3 and a capacitor PC4, the positive electrode of the LED lamp TL1 is connected to the driving chip PU1, the negative electrode of the LED lamp TL1 is connected to the positive electrode of the LED lamp TL2, the negative electrode of the LED lamp TL2 is connected to the drain of the MOS tube Q2, one end of the capacitor PC3 is connected to the positive electrode of the LED lamp TL1, the other end of the capacitor PC3 is connected to one end of the capacitor PC4, and the other end of the capacitor PC4 is connected to the negative electrode of the LED lamp TL2.

[0011] Furthermore, the driving chip PU1 includes fourteen pins: an EN pin, a DIA pin, a PWM pin, a FAULT pin, a GND pin, an SSL pin, an SSH pin, an OUT pin, an IN pin, a VIN pin and three NC pins.

[0012] Furthermore, the EN pin is connected to the cathode of the diode PD1, and the OUT pin is connected to the position light unit and the turn light unit.

[0013] The utility model also provides a vehicle lamp, comprising the lighting driving circuit suitable for the vehicle lamp with a shared light-emitting surface.

[0014] The beneficial effect of the utility model is that, by providing the first switch unit and the second switch unit, the position light unit and the turn light unit can share a linear drive unit, which can not only simplify the circuit structure but also save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 The utility model is a circuit diagram of a lighting drive circuit.

[0017] In the figure: 1. Linear drive unit; 2. First switch unit; 3. Second switch unit; 4. Position light unit; 5. Turn signal light unit. DETAILED DESCRIPTION

[0018] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0019] In the description of the present utility model, it is necessary to understand 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 utility model 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 utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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.

[0021] like Figure 1 As shown, the lighting drive circuit of the present invention comprises: a linear drive unit 1, a first switch unit 2, a second switch unit 3, a position light unit 4 and a turn light unit 5, wherein the first switch unit 2 is connected to the linear drive unit 1, the second switch unit 3 is connected to the linear drive unit 1, the position light unit 4 is connected to the first switch unit 2, and the turn light unit 5 is connected to the second switch unit 3. The present invention can realize that the position light unit 4 and the turn light unit 5 share one linear drive unit 1 by providing the first switch unit 2 and the second switch unit 3, which can not only simplify the circuit structure but also save costs.

[0022] Specifically, the linear drive unit 1 includes: a drive chip PU1, a bidirectional breakdown diode PT1, a capacitor PC5, a resistor PR9 and a diode PD1, the cathode of the diode PD1 is connected to the drive chip PU1, the bidirectional breakdown diode PT1, the capacitor PC5 and the resistor PR9 are connected in parallel, and one end of the resistor PR9 is connected to the anode of the diode PD1. The drive chip PU1 includes fourteen pins: an EN pin (enable pin), a DIA pin, a PWM pin, a FAULT pin, a GND pin, an SSL pin, an SSH pin, an OUT pin (output pin), an IN pin, a VIN pin (power input pin) and three NC pins. The EN pin is connected to the cathode of the diode PD1, the anode of the diode PD1 is connected to the control end, and the OUT pin is connected to the position light unit 4 and the turn signal unit 5. For example, the model of the drive chip PU1 is TPS92610.

[0023] Specifically, the first switch unit 2 includes: a MOS tube Q1, a resistor PR1 and a resistor PR2, the drain of the MOS tube Q1 is connected to the position light unit 4, the source of the MOS tube Q1 is grounded, the gate of the MOS tube Q1 is connected to one end of the resistor PR1, one end of the resistor PR2 is connected to the gate of the MOS tube Q1, and the other end of the resistor PR2 is grounded. The position light unit 4 includes: an LED lamp PL1, an LED lamp PL2, a capacitor PC1 and a capacitor PC2, the positive electrode of the LED lamp PL1 is connected to the driving chip PU1, the negative electrode of the LED lamp PL1 is connected to the positive electrode of the LED lamp PL2, the negative electrode of the LED lamp PL2 is connected to the drain of the MOS tube Q1, one end of the capacitor PC1 is connected to the positive electrode of the LED lamp PL1, the other end of the capacitor PC1 is connected to one end of the capacitor PC2, and the other end of the capacitor PC2 is connected to the negative electrode of the LED lamp PL2.

[0024] Specifically, the second switch unit 3 includes: a MOS tube Q2, a resistor PR4 and a resistor PR7, the drain of the MOS tube Q1 is connected to the turn signal unit 5, the source of the MOS tube Q1 is grounded, the gate of the MOS tube Q1 is connected to one end of the resistor PR4, one end of the resistor PR7 is connected to the gate of the MOS tube Q2, and the other end of the resistor PR7 is grounded. The turn signal unit 5 includes: an LED lamp TL1, an LED lamp TL2, a capacitor PC3 and a capacitor PC4, the positive electrode of the LED lamp TL1 is connected to the driving chip PU1, the negative electrode of the LED lamp TL1 is connected to the positive electrode of the LED lamp TL2, the negative electrode of the LED lamp TL2 is connected to the drain of the MOS tube Q2, one end of the capacitor PC3 is connected to the positive electrode of the LED lamp TL1, the other end of the capacitor PC3 is connected to one end of the capacitor PC4, and the other end of the capacitor PC4 is connected to the negative electrode of the LED lamp TL2.

[0025] It should be noted that the other end of the resistor PR1, the other end of the resistor PR4 and the positive electrode of the diode PD1 are all connected to the control end. When the control end sends a position light function signal, the MOS tube Q1 is turned on and the MOS tube Q2 is turned off. At this time, the position light unit 4 can be lit, and the turn light unit 5 is not lit. When the control end sends a turn light function signal, the MOS tube Q1 is turned off and the MOS tube Q2 is turned on. At this time, the turn light unit 5 can be lit, and the position light unit 4 is not lit. Therefore, the utility model can realize a linear drive unit 1 lighting different functions by improving the circuit structure.

[0026] The utility model also provides a vehicle lamp, comprising a lighting driving circuit suitable for vehicle lamps with a common light-emitting surface.

[0027] In summary, the lighting drive circuit of the vehicle lamps suitable for sharing the light-emitting surface and the vehicle lamps having the same can realize that the position lamp unit 4 and the turn lamp unit 5 share a linear drive unit 1 by setting the first switch unit 2 and the second switch unit 3, which can not only simplify the circuit structure but also save costs.

[0028] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A lighting driving circuit suitable for vehicle lamps with a common light-emitting surface, characterized in that: include: A linear drive unit (1), a first switch unit (2), a second switch unit (3), a position light unit (4) and a turn signal unit (5), wherein the position light unit (4) is connected to the linear drive unit (1), the turn signal unit (5) is connected to the linear drive unit (1), the position light unit (4) is connected to the first switch unit (2), and the turn signal unit (5) is connected to the second switch unit (3); The linear drive unit (1) comprises: a drive chip PU1, a bidirectional breakdown diode PT1, a capacitor PC5, a resistor PR9 and a diode PD1, wherein the cathode of the diode PD1 is connected to the drive chip PU1, the bidirectional breakdown diode PT1, the capacitor PC5 and the resistor PR9 are connected in parallel, and one end of the resistor PR9 is connected to the anode of the diode PD1; The first switch unit (2) comprises: a MOS tube Q1, a resistor PR1 and a resistor PR2, the drain of the MOS tube Q1 being connected to the position light unit (4), the source of the MOS tube Q1 being grounded, the gate of the MOS tube Q1 being connected to one end of the resistor PR1, one end of the resistor PR2 being connected to the gate of the MOS tube Q1, and the other end of the resistor PR2 being grounded; The second switch unit (3) comprises: a MOS tube Q2, a resistor PR4 and a resistor PR7, the drain of the MOS tube Q1 being connected to the turn signal unit (5), the source of the MOS tube Q1 being grounded, the gate of the MOS tube Q1 being connected to one end of the resistor PR4, one end of the resistor PR7 being connected to the gate of the MOS tube Q2, and the other end of the resistor PR7 being grounded; The position light unit (4) comprises: an LED light PL1, an LED light PL2, a capacitor PC1 and a capacitor PC2, wherein the positive electrode of the LED light PL1 is connected to the driving chip PU1, the negative electrode of the LED light PL1 is connected to the positive electrode of the LED light PL2, the negative electrode of the LED light PL2 is connected to the drain of the MOS tube Q1, one end of the capacitor PC1 is connected to the positive electrode of the LED light PL1, the other end of the capacitor PC1 is connected to one end of the capacitor PC2, and the other end of the capacitor PC2 is connected to the negative electrode of the LED light PL2; The turn signal lamp unit (5) comprises: an LED lamp TL1, an LED lamp TL2, a capacitor PC3 and a capacitor PC4, wherein the positive electrode of the LED lamp TL1 is connected to the driving chip PU1, the negative electrode of the LED lamp TL1 is connected to the positive electrode of the LED lamp TL2, the negative electrode of the LED lamp TL2 is connected to the drain of the MOS tube Q2, one end of the capacitor PC3 is connected to the positive electrode of the LED lamp TL1, the other end of the capacitor PC3 is connected to one end of the capacitor PC4, and the other end of the capacitor PC4 is connected to the negative electrode of the LED lamp TL2.

2. The lighting driving circuit for vehicle lamps with a common light-emitting surface as claimed in claim 1, characterized in that: The driving chip PU1 includes fourteen pins: an EN pin, a DIA pin, a PWM pin, a FAULT pin, a GND pin, an SSL pin, an SSH pin, an OUT pin, an IN pin, a VIN pin and three NC pins.

3. The lighting driving circuit for vehicle lamps with a common light-emitting surface as claimed in claim 2, characterized in that: The EN pin is connected to the cathode of the diode PD1, and the OUT pin is connected to the position light unit (4) and the turn signal light unit (5).

4. A vehicle lamp, characterized in that: The invention comprises a lighting driving circuit suitable for vehicle lamps with a common light-emitting surface as described in any one of claims 1 to 3.

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