Low-temperature vehicle lamp automatic control system, vehicle lamp and vehicle

Abstract

The utility model relates to the technical field of automobile lamps, in particular to a low-temperature automobile lamp automatic control system, an automobile lamp and an automobile. The low-temperature automobile lamp automatic control system comprises a power management module, a control module, a temperature sensing module, a heating module and an LED light-emitting module. The power management module, the temperature sensing module, the heating module and the LED light-emitting module are all connected with the control module. The power management module is connected with the LED light-emitting module; wherein the heating module is arranged close to the LED light-emitting module, temperature information of the position where the heating module is located is detected through the temperature sensing module, the temperature information is transmitted to the control module, the control module processes the temperature information, and when the temperature information is smaller than a preset value, the heating module is controlled to work, and the LED light-emitting module is heated. According to the automatic control system for the low-temperature vehicle lamp, the vehicle lamp can work normally at the extreme low temperature, and the working stability of the vehicle lamp is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lamps, in particular to a low-temperature lamp automatic control system, a lamp and a vehicle thereof. Background Art

[0002] With the development of vehicle technology, the technology of car lights is becoming more and more complex, and the quality and cost requirements of LEDs are also getting higher and higher. At present, most of the design requirements of car lights need to meet the normal working conditions of voltage between 9-16V and temperature between -40℃-70℃. However, car lights may work unstably or not work properly under extremely low temperatures, which can easily be misjudged as lamp failure. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to solve the technical problem in the prior art that the vehicle lights work unstably or cannot work normally at extremely low temperatures, the utility model provides a low-temperature vehicle light automatic control system, which can work normally at extremely low temperatures and improves the stability of the vehicle light operation.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a low-temperature vehicle light automatic control system, including: a power management module, a control module, a temperature sensor module, a heating module and an LED light-emitting module;

[0005] The power management module, the temperature sensing module, the heating module and the LED light emitting module are all connected to the control module;

[0006] The power management module is connected to the LED light emitting module;

[0007] Wherein, the temperature sensing module and the heating module are both arranged close to the LED light emitting module.

[0008] Further, specifically, the heating module includes a switch control unit and a heating unit;

[0009] The control module and the heating unit are both connected to the switching control unit.

[0010] Further, specifically, the switch control unit includes: a first MOS tube PQ5, a second MOS tube PQ6, a resistor PR11, a resistor PR12, a resistor PR13 and a resistor PR14; the source of the first MOS tube PQ5 and one end of the resistor PR11 are both connected to the power management module, the other end of the resistor PR11 and one end of the resistor PR12 are both connected to the gate of the first MOS tube, the other end of the resistor PR12 is connected to the drain of the second MOS tube PQ6, one end of the resistor PR13 is connected to the control module, the other end of the resistor PR13 and one end of the resistor PR14 are both connected to the gate of the second MOS tube PQ6, the other end of the resistor PR14 and the source of the second MOS tube PQ6 are both connected to the common ground, and the drain of the first MOS tube is connected to the heating unit.

[0011] Further, specifically, the heating unit includes a plurality of heating resistors; each heating resistor is connected in parallel, one end of the parallel connection is connected to the drain of the first MOS tube, and the other end of the parallel connection is connected to the common ground.

[0012] Further, specifically, the power management module includes: a protection unit and a power conversion unit; one end of the protection unit is connected to the vehicle body power terminal, and the other end of the protection unit and the LED light emitting module are both connected to the power conversion unit;

[0013] Further, specifically, the power management module also includes a 5V voltage stabilizing unit; the 5V voltage stabilizing unit is connected to the control module.

[0014] A vehicle lamp is provided with the low-temperature vehicle lamp automatic control system as described above.

[0015] A vehicle comprises the vehicle lamp as described above.

[0016] The beneficial effect of the utility model is that the low-temperature car light automatic control system of the utility model has a simple structure, detects the temperature information at the location through the temperature sensor module, and transmits the temperature information to the control module, and the control module processes the temperature information. When the temperature information is less than the preset value, the heating module is controlled to work to heat the LED light-emitting module, so that the car light can work normally under extremely low temperatures, thereby improving the stability of the car light operation; in addition, by compensating the temperature of the LED light-emitting module, the problem of the limitation of the light-emitting diode voltage bin is also solved, thereby reducing the procurement cost of the light-emitting diode, and the practicality is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the optimal embodiment of the utility model.

[0019] Figure 2 This is a circuit schematic diagram of a heating module according to an optimal embodiment of the utility model.

[0020] Figure 3 It is a circuit schematic diagram of the protection unit of the optimal embodiment of the utility model.

[0021] Figure 4 It is a circuit schematic diagram of the power conversion unit of the optimal embodiment of the utility model.

[0022] Figure 5 It is a circuit schematic diagram of a 5V voltage stabilizing unit of the optimal embodiment of the utility model.

[0023] Figure 6 It is a circuit schematic diagram of the connection between the control module and the temperature sensor module in the optimal embodiment of the utility model.

[0024] Figure 7 It is a circuit schematic diagram of the LED light-emitting module of the optimal embodiment of the utility model.

[0025] Figure 8 This is a binning diagram of a specific light emitting diode according to the best embodiment of the utility model.

[0026] Fig. 9 It is a curve diagram of a specific light emitting diode voltage bin corresponding to different voltage ranges in the optimal embodiment of the utility model.

[0027] In the figure, 1 is a power management module; 2 is a control module; 3 is a temperature sensor module; 4 is a heating module; 5 is an LED light-emitting module; 11 is a protection unit; 12 is a power conversion unit; 13 is a 5V voltage regulator unit; 41 is a switch control unit; 42 is a heating unit; 51 is a driving unit; and 52 is a light-emitting unit. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figure 1 As shown, it is the optimal embodiment of the utility model, a low-temperature vehicle light automatic control system, comprising: a power management module 1, a control module 2, a temperature sensor module 3, a heating module 4 and an LED light-emitting module 5; the power management module 1, the temperature sensor module 3, the heating module 4 and the LED light-emitting module 5 are all connected to the control module 2; the power management module 1 is connected to the LED light-emitting module 5; wherein the temperature sensor module 3 and the heating module 4 are both arranged close to the LED light-emitting module 5.

[0032] The temperature information at the location is detected by the temperature sensing module 3, and the temperature information is transmitted to the control module 2. The control module 2 processes the temperature information. When the temperature information is less than a preset value, the heating module 4 is controlled to operate to heat the LED light-emitting module 5, so that the car lamp can work normally under extremely low temperatures, thereby improving the stability of the car lamp operation.

[0033] In an embodiment, Figure 2As shown, the heating module 4 includes a switch control unit 41 and a heating unit 42; the control module 2 and the heating unit 42 are both connected to the switching control unit. Specifically, the switch control unit 41 includes: a first MOS tube PQ5, a second MOS tube PQ6, a resistor PR11, a resistor PR12, a resistor PR13 and a resistor PR14; the source of the first MOS tube PQ5 and one end of the resistor PR11 are both connected to the power management module 1, the other end of the resistor PR11 and one end of the resistor PR12 are both connected to the gate of the first MOS tube, the other end of the resistor PR12 is connected to the drain of the second MOS tube PQ6, one end of the resistor PR13 is connected to the control module 2, the other end of the resistor PR13 and one end of the resistor PR14 are both connected to the gate of the second MOS tube PQ6, the other end of the resistor PR14 and the source of the second MOS tube PQ6 are both connected to the common ground, and the drain of the first MOS tube is connected to the heating unit 42.

[0034] The heating unit 42 includes a plurality of heating resistors; each of the heating resistors is connected in parallel, one end of the parallel connection is connected to the drain of the first MOS tube, and the other end of the parallel connection is connected to the common ground.

[0035] When the temperature information is less than the preset value, the control module 2 controls the switch control unit 41, and the control module 2 outputs a high level to the gate of the second MOS tube PQ6, the drain of the second MOS tube PQ6 and the source of the second MOS tube PQ6 are turned on, and then the source of the first MOS tube PQ5 and the drain of the first MOS tube PQ5 are turned on, and the power signal is transmitted to the heating unit 42, and the heating unit 42 is controlled to start working, and the heat generated by the resistance of the heating unit 42 is used to compensate the temperature of the LED light-emitting module 5.

[0036] In an embodiment, Figure 3-4 As shown, the power management module 1 includes: a protection unit 11 and a power conversion unit 12; one end of the protection unit 11 is connected to the vehicle body power end, and the other end of the protection unit 11 and the LED light-emitting module 5 are both connected to the power conversion unit 12.

[0037] Specifically, the protection unit 11 may include: a transient diode PT1, a capacitor PC2, a capacitor PC3, a plurality of resistors, a first switch tube PQ1, a second switch tube PQ2, a third switch tube PQ3, a fourth switch tube PQ4, a capacitor PC1 and a first diode PD1. The transient diode PT1, the capacitor PC2 and the capacitor PC3 are connected in parallel, one end of which is connected to the vehicle body power supply end, and the other end is connected to the common ground end. The drain of the first switch tube PQ1 is connected to the vehicle body power supply end. One end of the resistor PR1 is connected to the source of the first switch tube PQ1, and the other end of the resistor PR1 is connected to the gate of the first switch tube PQ1. The resistor PR1, the first diode PD1 and the capacitor PC1 are connected in parallel, and one end of the parallel connection is connected to the second switch tube PQ 2, the other end of the parallel connection is connected to the gate of the second switch tube PQ2, the drain of the second switch tube PQ2 is the output end of the protection unit 11, the drain of the third switch tube PQ3 is connected to the gate of the second switch tube PQ2 via the resistor PR4, one end of the resistor PR6 is connected to the 5V power supply end, one end of the resistor PR9 is connected to the control module 2, the other end of the resistor PR9 and one end of the resistor PR10 are both connected to the gate of the fourth switch tube PQ4, the other end of the resistor PR6 and one end of the resistor PR7 are both connected to the drain of the fourth switch tube PQ4, the other end of the resistor PR7 and one end of the resistor PR8 are both connected to the gate of the third opening tube PQ3, and the other end of the resistor PR10 and the other end of the resistor PR8 are both connected to the common ground end. Among them, the first switch tube PQ1, the second switch tube PQ2, the third switch tube PQ3, and the fourth switch tube PQ4 are all MOS tubes.

[0038] The power conversion unit 12 can be a step-down unit, which may include: multiple resistors, multiple capacitors, multiple inductors and a step-down chip DU1, wherein the voltage input pin of the step-down chip DU1 can be used as the input end of the step-down unit, the input end of the step-down unit is connected to the output end of the protection unit 11, and the switch control pin of the step-down chip DU1 can be used as the output end to power the LED light-emitting module 5.

[0039] In an embodiment, Figure 5 As shown, the power management module 1 also includes a 5V voltage stabilizing unit 13; the 5V voltage stabilizing unit 13 is connected to the control module 2. The input end of the 5V voltage stabilizing unit 13 is connected to the vehicle body power supply end, and the signal from the vehicle body power supply end is stabilized at 5V after being stabilized by the 5V voltage stabilizing unit 13. In other words, the 5V voltage stabilizing unit 13 provides a 5V power supply signal for powering the control module 2. The integrated chip model of the 5V voltage stabilizing unit 13 is but not limited to TJA1028.

[0040] In this embodiment, if Figure 6As shown, the control chip of the control module adopts but is not limited to S9KEAZ128AMLH, and the temperature sensor of the temperature sensor module is a thermistor.

[0041] In this embodiment, if Figure 7 As shown, the LED light-emitting module 5 includes a driving unit 51 and a light-emitting unit 52. The driving unit 51 includes a driving chip. The output end of the power conversion unit 12 is connected to the driving chip for controlling the light-emitting unit 52. The light-emitting unit 52 includes a plurality of light strings. Each light string includes at least 3 light-emitting diodes. Each light-emitting diode is connected in series. The model of each light-emitting diode is, but not limited to, KR DMLQ32.23. In addition, a capacitor is connected in parallel to each light-emitting diode to balance the current on the light-emitting diode, so that the circuit works more stably and the stability of the circuit is further improved.

[0042] Assuming the number of LEDs is 3, the model is KR DMLQ32.23, and the specific instructions are:

[0043] like Figure 8 As shown, the LED voltage bins are divided into four types: J3, M3, Q3 and T3. Each voltage bin corresponds to a different voltage range. The curve diagram shows the LED voltage changes at different temperatures. For example, at -40°C, the LED voltage needs to increase by 0.15V, at 25°C the LED voltage increase is 0V, and at 80°C the LED voltage needs to decrease by about 0.07V. Fig. 9 As shown, if T3 voltage bin is used, the highest single LED voltage at room temperature is 2.6V. If the light-emitting diode voltage is 2.6+0.15V=2.75 at -40℃, the total LED voltage is 2.75*3=8.25V. Since the BUCK output is 8.5V, the normal working voltage of the driver chip must require 8.5-LED*3>0.5V, so the single LED voltage needs to be less than 2.66V. When T3 voltage bin is selected, the light-emitting diode will work unstably or cannot work normally. The temperature sensor detects that the current temperature is close to -40℃, and the control module 2 controls the heating module 4 to heat the diode on the LED light-emitting module 5, so that the single LED voltage is less than 2.66V, ensuring normal operation and improving the stability of the car light.

[0044] It should be noted that the characteristic of the light-emitting diode in the prior art is that its rated voltage will change under different temperature conditions, which leads to the step of screening the voltage bin of the LED in the process of selecting the light-emitting diode. The screening process greatly increases the procurement cost. The light-emitting diode on the LED light-emitting module 5 is heated by the heating module 4 so that the voltage of a single LED is less than 2.66V, thereby solving the problem of the limitation of the voltage bin of the light-emitting diode and reducing the procurement cost of the light-emitting diode.

[0045] A vehicle lamp is provided with the above-mentioned low-temperature vehicle lamp automatic control system.

[0046] A vehicle comprises the above vehicle lamp.

[0047] In summary, the low-temperature car light automatic control system of the utility model has a simple structure. The temperature information at the location is detected by the temperature sensor module 3, and the temperature information is transmitted to the control module 2. The control module 2 processes the temperature information. When the temperature information is less than the preset value, the heating module 4 is controlled to work to heat the LED light-emitting module 5, so that the car light can work normally under extremely low temperatures, thereby improving the stability of the car light operation. In addition, by compensating the temperature of the LED light-emitting module 5, the problem of the limitation of the light-emitting diode voltage bin is also solved, thereby reducing the procurement cost of the light-emitting diode, and the practicality is good.

[0048] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating 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 low temperature vehicle light automatic control system, characterized in that: include: A power management module (1), a control module (2), a temperature sensor module (3), a heating module (4) and an LED light emitting module (5); The power management module (1), the temperature sensing module (3), the heating module (4) and the LED light emitting module (5) are all connected to the control module (2); The power management module (1) is connected to the LED light emitting module (5); Wherein, the temperature sensing module (3) and the heating module (4) are both arranged close to the LED light emitting module (5).

2. The low temperature vehicle light automatic control system according to claim 1, characterized in that: The heating module (4) comprises a switch control unit (41) and a heating unit (42); The control module (2) and the heating unit (42) are both connected to the switch control unit.

3. The low temperature vehicle light automatic control system according to claim 2, characterized in that: The switch control unit (41) comprises: a first MOS transistor PQ5, a second MOS transistor PQ6, a resistor PR11, a resistor PR12, a resistor PR13 and a resistor PR14; The source of the first MOS tube PQ5 and one end of the resistor PR11 are both connected to the power management module (1), the other end of the resistor PR11 and one end of the resistor PR12 are both connected to the gate of the first MOS tube, the other end of the resistor PR12 is connected to the drain of the second MOS tube PQ6, one end of the resistor PR13 is connected to the control module (2), the other end of the resistor PR13 and one end of the resistor PR14 are both connected to the gate of the second MOS tube PQ6, the other end of the resistor PR14 and the source of the second MOS tube PQ6 are both connected to a common ground, and the drain of the first MOS tube is connected to the heating unit (42).

4. The low temperature vehicle light automatic control system according to claim 3, characterized in that: The heating unit (42) includes a plurality of heating resistors; Each heating resistor is connected in parallel, one end of the parallel connection is connected to the drain of the first MOS tube, and the other end of the parallel connection is connected to the common ground.

5. The low temperature vehicle light automatic control system according to claim 1, characterized in that: The power management module (1) comprises: a protection unit (11) and a power conversion unit (12); One end of the protection unit (11) is connected to the power supply end of the vehicle body, and the other end of the protection unit (11) and the LED light-emitting module (5) are both connected to the power conversion unit (12).

6. The low temperature vehicle light automatic control system as claimed in claim 5, characterized in that: The power management module (1) further comprises a 5V voltage stabilizing unit (13); The 5V voltage stabilizing unit (13) is connected to the control module (2).

7. A vehicle lamp, characterized in that: The vehicle lamp is equipped with a low-temperature vehicle lamp automatic control system as claimed in any one of claims 1 to 6.

8. A vehicle, characterized in that: The vehicle comprises the vehicle lamp as claimed in claim 7.

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