DLP driver and vehicle lamp comprising same

Abstract

The utility model belongs to the technical field of vehicle lamps, and particularly relates to a DLP driver and a vehicle lamp comprising the same, the DLP driver comprises a BUCK circuit, a CAN transceiver, a motor driving chip and an MCU microcontroller, the BUCK circuit is connected with the MCU microcontroller, the MCU microcontroller is connected with the CAN transceiver through a CAN interface, and the MCU microcontroller is connected with the motor driving chip through an SPI interface. The DLP driver provided by the utility model is arranged between the vehicle body end and the DLP module, can directly process CAN messages from the vehicle body end, process and filter the CAN messages and then forward the CAN messages to the DLP module, can also receive messages actively sent by the DLP module, process the messages and then forward the messages to the vehicle body end, plays a connecting role, saves calculation processing time for the DLP module, and improves DLP performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle lamps, and particularly relates to a DLP driver and a vehicle lamp including the same. Background Art

[0002] With the popularization of intelligence, the automotive industry is now in a period of rapid development. For vehicle lamps, people not only pursue the lighting function but also stronger performance and more functions.

[0003] DLP (Digital Light Processing) is digital light processing, which is a technology for visual digital information display based on the digital micromirror device - DMD (Digital Micromirror Device) developed by TI (Texas Instruments, USA). That is, the DLP projection technology uses a digital micromirror chip (DMD) as the main key processing element to achieve the digital optical processing process, and it has a wide range of applications in industry.

[0004] The high resolution of DLP headlamps enables them to not only achieve the functions of matrix headlamps but also realize a variety of personalized lighting modes through the programming functions provided by suppliers. However, directly controlling the DLP headlamp module through the vehicle body to turn on the DLP headlamp and having the DLP headlamp module complete the signal reception and feedback results in a relatively long calculation and processing time, reducing the DLP performance. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a DLP driver and a vehicle lamp including the same. By setting a DLP driver between the vehicle body end and the DLP module, it plays a connecting role, can directly process the CAN messages from the vehicle body end, forward them to the DLP module after processing and filtering, and can also receive the messages actively sent by the DLP module, process them and then forward them to the vehicle body end, saving the calculation and processing time for the DLP module and improving the DLP performance.

[0006] The utility model provides a DLP driver. One end of the DLP driver is connected to the vehicle body end and the other end is connected to the DLP module for driving the DLP module, and it includes:

[0007] A BUCK circuit, a CAN transceiver, a motor drive chip, and an MCU microcontroller. The BUCK circuit is connected to the MCU microcontroller, the MCU microcontroller is connected to the CAN transceiver through a CAN interface, and the MCU microcontroller is connected to the motor drive chip through an SPI interface.

[0008] Further, the DLP driver is respectively connected to the vehicle body end and the DLP module through a CAN bus.

[0009] Further, the DLP module includes: an LED lamp, a digital micromirror device, and a motor. The LED lamp, the digital micromirror device, and the motor are such that the BUCK circuit is connected to the LED lamp, and the LED lamp is used to project the pattern displayed by the digital micromirror device; the motor driver chip is connected to the motor, and the motor is used to control the display angle of the DLP module. Further, the CAN transceiver is connected to the DLP module via a CAN bus.

[0010] Further, the MCU microcontroller uses the S32K314 chip of NXP Corporation.

[0011] Further, the driver chip of the BUCK circuit uses the LM3409 chip of Company T1.

[0012] Further, the CAN transceiver uses the TCAN1044 chip of Company T1.

[0013] Further, the motor driver chip uses the DRV8889 chip of Company T1.

[0014] This application also provides a vehicle headlamp that uses the DLP driver described above.

[0015] The beneficial effects of the present utility model are:

[0016] For a DLP driver of the present utility model, by disposing the DLP driver between the vehicle body end and the DLP module, it can directly process CAN messages from the vehicle body end, forward them to the DLP module after processing and filtering, and can also receive messages actively sent by the DLP module, forward them to the vehicle body end after processing, playing a connecting role, saving computing and processing time for the DLP module, and improving DLP performance.

[0017] For the vehicle headlamp of the present utility model, since it is equipped with a DLP driver, it thus has the advantages of the DLP driver at the same time.

[0018] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, details are described as follows. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 System block diagram of the DLP driver of the present utility model;

[0021] Figure 2 Logic control diagram of the present utility model;

[0022] Figure 3 Workflow diagram of the present utility model.

[0023] In the figure:

[0024] 1. Body end; 2. DLP driver; 21. BUCK circuit; 22. CAN transceiver; 23. Motor drive chip; 24. MCU microcontroller; 3. DLP module; 31. LED lamp; 32. Motor; 33. Digital micromirror device. Specific embodiments

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] As Figure 1 shown, the present utility model provides a DLP driver. One end of the DLP driver 2 is connected to the body end 1, and the other end is connected to the DLP module 3 for driving the DLP module 3, including:

[0027] BUCK circuit 21, CAN transceiver 22, motor drive chip 23 and MCU microcontroller 24. The BUCK circuit 21 is connected to the MCU microcontroller 24, the MCU microcontroller 24 is connected to the CAN transceiver 22 through a CAN interface, and the MCU microcontroller 24 is connected to the motor drive chip 23 through an SPI interface.

[0028] The DLP driver 2 is respectively connected to the body end 1 and the DLP module 3 through a CAN bus.

[0029] The DLP module 3 includes: LED lamp 31, digital micromirror device 33 and motor 32. The LED lamp 31, digital micromirror device 33 and motor 32. The BUCK circuit 21 is connected to the LED lamp 31, and the LED lamp 31 is used to project the pattern displayed by the digital micromirror device 33; the motor drive chip 23 is connected to the motor 32, and the motor 32 is used to control the display angle of the DLP module 3. The CAN transceiver 22 is connected to the DLP module 3 through a CAN bus.

[0030] In other words, the single - lamp DLP driver 2 of the present utility model includes an MCU microcontroller 24, a BUCK circuit 21, a CAN transceiver 22, and a motor drive chip 23. The DLP driver 2 communicates with the vehicle body end 1 and the DLP module 3 through the CAN bus. The BUCK circuit 21 in the DLP driver 2 supplies power to the LEDs of the DLP module 3, and the MCU microcontroller 24 adjusts the analog voltage of the BUCK circuit 21 by changing the PWM waveform to change the output current, so as to adjust the brightness of the DLP module 3. The CAN transceiver 22 processes the CAN signals of the DLP module 3, and the motor drive chip 23 is connected to the motor 32 carried by the DLP module 3 to adjust the height of the DLP.

[0031] Among them, the MCU microcontroller 24 uses the S32K314 chip of NXP Company, the drive chip of the BUCK circuit 21 uses the LM3409 chip of T1 Company, the CAN transceiver 22 uses the TCAN1044 chip of T1 Company, and the motor drive chip 23 uses the DRV8889 chip of T1 Company.

[0032] Working principle:

[0033] As Figure 2 and 3 shown, the vehicle body end 1 sends a message to light the DLP to the DLP driver 2 of the present utility model through the CAN bus. The DLP driver 2 determines whether the message includes a brightness signal and a switch information. If one of the information is missing, the DLP driver 2 directly replies to the vehicle body end 1 with a negative response. If the message is legal, that is, both information are available, the DLP_MCU_EN pin is pulled high, with a value of 1, in the enabled state, and the DLP driver 2 forwards the message to the DLP module 3. After receiving it, the DLP module 3 returns the status of the DLP_LED_EN pin to the DLP driver 2. At this time, if both the DLP_MCU_EN and DLP_LED_EN pins are in the enabled state with a value of 1, then the LED lamp 31 will be normally lit. Otherwise, the DLP module 3 reports the fault to the DLP driver 2 through the CAN bus, and the DLP driver 2 then replies to the vehicle body end 1.

[0034] The present utility model also provides a vehicle lamp that uses the above - mentioned DLP driver.

[0035] All in all, setting the DLP driver between the vehicle body end and the DLP module can directly process the CAN messages from the vehicle body end, forward them to the DLP module after processing and filtering, and can also receive the messages actively sent by the DLP module, forward them to the vehicle body end after processing, playing a role of connecting the upper and lower, saving the calculation and processing time for the DLP module, and improving the DLP performance.

[0036] The headlight of the present utility model has a DLP driver, and thus has the advantages of the DLP driver at the same time.

[0037] All the components selected in this application are common standard components or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0038] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" shall 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] Taking the above-mentioned ideal embodiment of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A DLP driver, wherein one end of the DLP driver (2) is connected to a vehicle body end (1) and the other end is connected to a DLP module (3), for driving the DLP module (3), characterized in that: include: A BUCK circuit (21), a CAN transceiver (22), a motor drive chip (23) and an MCU microcontroller (24), wherein the BUCK circuit (21) is connected to the MCU microcontroller (24), the MCU microcontroller (24) is connected to the CAN transceiver (22) via a CAN interface, and the MCU microcontroller (24) is connected to the motor drive chip (23) via an SPI interface.

2. The DLP driver according to claim 1, wherein: The DLP driver (2) is respectively connected to the vehicle body end (1) and the DLP module (3) via a CAN bus.

3. The DLP driver according to claim 2, wherein: The DLP module (3) comprises: an LED lamp (31), a digital micromirror device (33) and a motor (32); the BUCK circuit (21) is connected to the LED lamp (31); and the LED lamp (31) is used to project a pattern displayed by the digital micromirror device (33); The motor driving chip (23) is connected to the motor (32), and the motor (32) is used to control the display angle of the DLP module (3).

4. The DLP driver according to claim 3, wherein: The CAN transceiver (22) is connected to the DLP module (3) via a CAN bus.

5. The DLP driver according to claim 1, wherein: The MCU microcontroller (24) adopts the S32K314 chip of NXP Company.

6. The DLP driver according to claim 1, wherein: The driving chip of the BUCK circuit (21) adopts the LM3409 chip of T1 Company.

7. The DLP driver according to claim 1, wherein: The CAN transceiver (22) uses the TCAN1044 chip of T1 Company.

8. The DLP driver according to claim 1, wherein: The motor drive chip (23) adopts the DRV8889 chip of T1 Company.

9. A vehicle lamp, characterized in that: A DLP driver as described in any one of claims 1 to 8 is used.

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