Dynamic projection lamp control system for vehicles

Abstract

The utility model belongs to the vehicle -mounted electronic technical field, in order to solve the technical problem that current dynamic projection lamp volume is bigger, cost is higher, provides a kind of vehicle dynamic projection lamp control system, at least includes: main control module, interface module, LED drive module and power module, main control module is connected with interface module and LED drive module electricity respectively, the input of power module is connected with car body end power, and the output of power module is connected with main control module and LED drive module electricity, and LED drive module adopts the mode of MOS pipe switching and can realize 4 high-power LED control, carries out PWM light control to each LED separately, saves device cost and board area, makes dynamic projection lamp overall volume reduce.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle electronic technology, specifically relating to a vehicle dynamic projection light control system. Background Technology

[0002] In recent years, the demand for intelligent interactive automotive lighting has become increasingly strong. Application scenarios are not limited to: vehicle boundary lighting, personalized patterns, dynamic projection lighting for turn signals / reversing lights, welcome light shows, and human-vehicle interaction displays. Currently, the main technologies capable of dynamic projection are DLP (Digital Light Processing), which uses digital micromirror devices (DMDs) to achieve high-precision, high-response dynamic image projection by rapidly controlling the switching state of the micromirrors. While it can achieve relatively rich projection functions, it is large and expensive, making it too extravagant for simple dynamic projection scenarios such as turning and reversing, thus increasing costs for automakers. It is even less suitable for projection lights installed in confined spaces such as rearview mirror sills. Utility Model Content

[0003] To address the technical problems of large size and high cost of existing dynamic projection lights, this utility model provides a vehicle dynamic projection light control system.

[0004] A vehicle dynamic projection light control system includes at least:

[0005] The main control module is used to receive control signals and feed them back to the LED driver module and the interface module;

[0006] The interface module is used to connect to the vehicle's LIN communication network to enable network control of the dynamic projection lights.

[0007] The LED driver module is used for individual PWM dimming control of each LED;

[0008] And a power supply module, used to supply power to each module;

[0009] The main control module is electrically connected to the interface module and the LED driver module, respectively. The input terminal of the power module is connected to the power supply at the vehicle body, and the output terminal of the power module is electrically connected to the main control module and the LED driver module.

[0010] Furthermore, the main control module includes an MCU control unit, a LIN control unit, and a PWM control unit. The output terminal of the MCU control unit is connected to the signal input terminals of the LIN control unit and the PWM control unit. The output terminal of the LIN control unit is connected to the signal input terminal of the interface module. The output terminal of the PWM control unit is connected to the signal input terminal of the LED driver module. The output terminal of the LED driver module is connected to multiple LEDs.

[0011] Furthermore, the power module includes a 12V power supply, an LED driver power supply, and a main control power supply. The 12V power supply is used for reverse connection protection and filtering. The LED driver power supply is controlled by the MCU control unit to provide power to the LED driver module independently. The main control power supply is used to power the main control module.

[0012] Technical effects:

[0013] This utility model's LED driver module uses a MOS transistor switching method to control four high-power LEDs. Each LED is individually controlled by PWM dimming, achieving the effect of driving two LEDs with a single Buck circuit. This saves on component costs and board area, resulting in a smaller overall size of the dynamic projection lamp. Combined with an MLA lens, it enables four-frame animation display. Through the design of the MLA lens, various application scenarios can be realized, such as dynamic projection of vehicle alarm signals, turn signals, and welcome functions. Attached Figure Description

[0014] Figure 1 This is a block diagram of the overall system structure of an embodiment of the present utility model.

[0015] Figure 2 This is a partial circuit diagram of the main control module in an embodiment of this utility model.

[0016] Figure 3 This is a circuit diagram of the interface module in an embodiment of the present invention.

[0017] Figure 4 This is a circuit diagram of the LED driver module in an embodiment of the present invention.

[0018] Figure 5 The circuit diagram of the 12V power supply for Embodiment 1 of this utility model is shown.

[0019] Figure 6 This is a circuit diagram of the LED driver power supply according to an embodiment of the present invention.

[0020] Figure 7 This is a circuit diagram of the main control power supply in an embodiment of this utility model. Detailed Implementation

[0021] 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.

[0022] like Figure 1 As shown, this utility model embodiment provides a vehicle dynamic projection light control system, including:

[0023] Main control module 1 is used to receive control signals and feed them back to LED driver module 3 and interface module 2; such as Figure 2 As shown, the control chip U3 of the main control module 1 is, but is not limited to, a YTM32B1LE05H0VLFT microcontroller.

[0024] Interface module 2 is used to connect to the vehicle's LIN communication network to achieve network control of the dynamic projection lights; such as... Figure 3 As shown, the main chip U5 of the interface module 2 is, but is not limited to, SIT1027.

[0025] LED driver module 3 is used for individual PWM dimming control of each LED. For example... Figure 4 As shown, this part of the circuit uses two IS32LT3965 chips, U1 and U2, which are Buck step-down constant current circuits capable of outputting a maximum current of 1.5A. The IS32LT3965 has a built-in error detection function, which can provide real-time feedback on error status to the main control module 1, enabling fault reporting. This embodiment provides four LED beads, and the LED driver module 3 can individually control the PWM dimming of each LED bead, greatly saving cost and board space.

[0026] Taking LED chip D1 and LED chip D2 as examples:

[0027] like Figure 4 As shown, field-effect transistors Q1 and Q3, resistors R2, R4, R13, R8, and capacitor C6 control LED chip D1. When field-effect transistor Q3 is on, field-effect transistor Q1 is on, and LED chip D1 is off; when field-effect transistor Q3 is off, field-effect transistor Q1 is off, and LED chip D1 is on. Field-effect transistor Q2, capacitor C9, resistors R6 and R9 control LED chip D2. When field-effect transistor Q2 is on, LED chip D2 is off; when field-effect transistor Q2 is off, LED chip D2 is on. Specifically, field-effect transistor Q1 is a PJQ4465AP-AU (PMOS), field-effect transistor Q3 is a PJQ4460AP-AU (NMOS), and field-effect transistor Q2 is a PJQ4460AP-AU (NMOS).

[0028] In one possible implementation, the MCU control unit 11 controls the three states of two LEDs in a single channel: all off, dimmed, and all on.

[0029] In the off state, the output is disabled by controlling pin 10 of the two IS32LT3965 chips to be low.

[0030] In dimming mode, by controlling the two IS32LT3965 pins 10 to be high level, the MCU control unit 11 outputs two PWM signals to perform dimming.

[0031] When fully lit, the two IS32LT3965 pins 10 are controlled to be high, and the LED PWM output of multiple pins of the MCU control unit 11 is low.

[0032] And power module 4, used to supply power to each module;

[0033] The main control module 1 is electrically connected to the interface module 2 and the LED driver module 3 respectively. The input end of the power module 4 is connected to the power supply at the vehicle body end, and the output end of the power module 4 is electrically connected to the main control module 1 and the LED driver module 3.

[0034] In one possible implementation, the main control module 1 includes an MCU control unit 11, a LIN control unit 12, and a PWM control unit 13. The output terminal of the MCU control unit 11 is connected to the signal input terminals of the LIN control unit 12 and the PWM control unit 13. The output terminal of the LIN control unit 12 is connected to the signal input terminal of the interface module 2. The output terminal of the PWM control unit 13 is connected to the signal input terminal of the LED driver module 3. The output terminal of the LED driver module 3 is connected to multiple LEDs.

[0035] In one possible implementation, the power module 4 includes a 12V power supply 41, an LED driver power supply 42, and a main control power supply 43. The 12V power supply 41 is used for reverse connection protection and filtering. The LED driver power supply 42 is controlled by the MCU control unit 11 to provide power to the LED driver module independently. The main control power supply 43 is used to power the main control module 1.

[0036] like Figure 5 As shown, the 12V power supply 41 uses a PMOS (P-channel metal-oxide-semiconductor) to achieve reverse connection protection. Because the PMOS has low internal resistance and low voltage under high current, the control system can achieve a lower operating voltage. A Π-type filter is also used to enhance EMC performance. The 12V power supply 41 circuit consists of a field-effect transistor Q7, a Zener diode DZ1, a capacitor C39, resistors R33 and R34, and provides reverse connection protection. The Zener diode DZ1 protects the VGS (gate-source voltage) of the field-effect transistor Q7 within a safe range. Capacitors C35 and C36, inductor L3, capacitor C37, and capacitor C38 form a Π-type filter. Specifically, the field-effect transistor Q7 is, but is not limited to, a PJQ4465AP-AU.

[0037] like Figure 6As shown, to further reduce the overall power consumption of the control system, the main control module 1 controls the LED driver power supply 42 circuit to provide independent power to the LED driver module 3. A PMOS transistor is used to achieve low-level power supply, and the power supply circuit consists of a field-effect transistor Q8, capacitor C41, resistor R35, and Zener diode DZ2. Independent power supply control for the LED driver module 3 is achieved by resistors R38 and R39, bipolar transistor Q9, and resistor R37. The left end of resistor R38 is connected to pin 15 of the main control module 1. When pin 15 outputs a high level, the power supply section is turned on; when it outputs a low level, the power supply section is turned off. Specifically, the field-effect transistor Q8 is, but is not limited to, PJQ4465AP-AU, and the bipolar transistor Q9 is, but is not limited to, BC817-25-AU.

[0038] like Figure 7 As shown, the control chip U4 of the main control power supply 43 is, but is not limited to, TMP1228, and the LDO regulator outputs 5V voltage to power the main control module 1.

[0039] Based on the above-described preferred embodiments of the present utility model, and through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of the present utility model. The technical scope of the present utility model is not limited to the contents of the specification.

Claims

1. A vehicle-mounted dynamic projection light control system, characterized in that, At least including: The main control module (1) is used to receive control signals and feed them back to the LED driver module (3) and the interface module (2); Interface module (2) is used to access the vehicle body LIN communication network to realize network control of dynamic projection lights; LED driver module (3) is used to perform PWM dimming control on each LED individually; And a power supply module (4) is used to supply power to each module; The main control module (1) is electrically connected to the interface module (2) and the LED driver module (3) respectively. The input end of the power supply module (4) is connected to the power supply at the vehicle body end, and the output end of the power supply module (4) is electrically connected to the main control module (1) and the LED driver module (3).

2. The vehicle dynamic projection light control system according to claim 1, characterized in that, The main control module (1) includes an MCU control unit (11), a LIN control unit (12), and a PWM control unit (13). The output terminal of the MCU control unit (11) is connected to the signal input terminals of the LIN control unit (12) and the PWM control unit (13). The output terminal of the LIN control unit (12) is connected to the signal input terminal of the interface module (2). The output terminal of the PWM control unit (13) is connected to the signal input terminal of the LED driver module (3). The output terminal of the LED driver module (3) is connected to multiple LEDs.

3. The vehicle dynamic projection light control system according to claim 1, characterized in that, The power module (4) includes a 12V power supply (41), an LED driver power supply (42), and a main control power supply (43). The 12V power supply (41) is used for reverse connection protection and filtering. The LED driver power supply (42) is controlled by the MCU control unit (11) to provide power to the LED driver module (3) separately. The main control power supply (43) is used to power the main control module (1).

Images