CN206884861U - A kind of pixel type self-adapted car headlamp control system based on DLP - Google Patents
A kind of pixel type self-adapted car headlamp control system based on DLP Download PDFInfo
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- CN206884861U CN206884861U CN201720412161.0U CN201720412161U CN206884861U CN 206884861 U CN206884861 U CN 206884861U CN 201720412161 U CN201720412161 U CN 201720412161U CN 206884861 U CN206884861 U CN 206884861U
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Abstract
The utility model belongs to automobile lamp control technology field, and in particular to a kind of pixel type self-adapted car headlamp control system based on DLP, including：For gathering the image processor of external image；MCU chip, the CAN message that image processor is sent is received, and CAN message is parsed and calculated；DLP control chips, receive the control information that MCU chip calculates；Dmd chip, the control information of DLP control chips is received, and change the angle of the tiny mirror of micromirror matrix inside it according to control information；LED light source component；LED drive chip, receive the pwm signal that MCU chip is sent and drive the bright of LED light source component or go out and brightness；LED light source component sends uniform beam to the inside micromirror matrix of dmd chip, is projected after the inside micromirror matrix reflection of dmd chip by matching somebody with somebody lens outside.The utility model control accuracy is high, is swift in response sensitive and compatible good.
Description
Technical field
It the utility model is related to automobile lamp control technology field, the adaptive vapour of especially a kind of pixel type based on DLP
Car headlamp control system.
Background technology
With the continuous improvement of people's living standards, automobile has become the daily walking-replacing tool of thousands of families, but
It is as the continuous improvement of automobile utilization rate, traffic accident incidence are also riseing year by year.The number grasped in recent years according to Ministry of Communications
According to analysis, the probability that traffic accident occurs for Chinese night is 1.5 times of daytime, and 60% major motor vehicle death by accident occurred at night
Between, wherein 30%-40% night traffic accident comes from abuse distance light and underlit.Therefore, many car light factories of recent domestic
Start to be directed to the research of automobile active safety technology with research institution.Wherein, relate generally to carry AFS in car light field
Before the automobile of (Adaptive Front-lighting System, AFS) or ADB (Adaptive Driving Beam) function
Illuminator.
Traditional Adaptive Mechanical headlamp Adjustment precision is low, and abrasion be present during adjusting.Matrix form headlamp
Due to the LED main light source limited amounts of LED light source matrix, the control accuracy of angle and dark space to light is low, and resolution ratio is relatively low.
Pixel type adaptive front lamp based on DLP is that one of AFS and ADB functions is integrated and upgraded, and this is mainly
DLP technologies are relied on to realize.DLP (Digital Light Processing) is a revolutionary character of projection and display information
New method, it is by the high DMD micro mirror elements of one piece of reflectivity (Digital Micromirror Device), by right
The control of micro mirror angle, changes the reflection angle of light, so as to form dark space in designated area, keeps away in its internal micromirror matrix
Exempt from dazzling.Meanwhile and maintain most light on road surface, except there is specific region existing for other vehicles, these regions lead to
Light type dynamic shielding is crossed, ensure that the peak use rate of night lights, effectively raises driving at night safety.
But prior art is simply proposed by DLP technologies to realize the problem of automobile lamp brightness and dark space adjust,
Research to control strategy is less, and Control system architecture is often more complicated, and integrated level is low, and circuit structure is complicated, and controls essence
Spend low, it is impossible to the accurately angle of control car light light regulating transmission and the size of dark space.
Utility model content
The purpose of this utility model be overcome in the prior art control system circuit it is complicated, control accuracy is low to ask
Topic, and a kind of control accuracy of research and design is high, be swift in response the sensitive and compatible good pixel type self-adapted car based on DLP
Headlamp control system and control method.
Technical scheme is used by the utility model solves its technical problem：
A kind of pixel type self-adapted car headlamp control system based on DLP, it is characterised in that including：
Image processor, described image processor are connected with CAN, for collection vehicle external image；
MCU chip, the MCU chip receives the CAN message that described image processor is sent, and CAN message is solved
Analysis and calculating；
DLP control chips, the DLP control chips receive the control information that the MCU chip calculates；
Dmd chip, the dmd chip receive the control information of DLP control chips, and are changed according to control information inside it
The angle of the tiny mirror of micromirror matrix；
LED light source component；
LED drive chip, the LED drive chip receive the pwm signal that the MCU chip is sent and drive LED light source
Component bright is gone out and brightness；
The LED light source component sends uniform beam to the inside micromirror matrix of the dmd chip, by dmd chip
The reflection of inside micromirror matrix after projected by matching somebody with somebody lens outside.
Further, the LED light source component includes LED main light sources, poly- lens and amendment lens.
Further, the DLP control chips send unlatching and the pass that the enabled orders of LED control the LED drive chip
Close.
Further, the temperature information of itself is fed back to MCU by the LED drive chip by DLP control chips in real time
Chip, the dutycycle for the pwm pulse signal that the MCU chip is sent according to the high high adjustment of temperature of LED drive chip, with regulation
The electric current of LED drive chip, ensure the safety of LED drive chip.
Further, CAN message is sent to MCU chip by described image processor by CAN transceiver.
Relative to prior art, the utility model apparently has the advantages that：
1st, the pixel type self-adapted car headlamp control system control method of the present utility model based on DLP is simple, collection
High into degree, circuit structure is simple, and control accuracy is high, is swift in response sensitive.
2nd, outside to be communicated using CAN, compatibility is good, and inside is communicated using IIC Integration Bus, can be read and be write online
Enter data, implementation is simple.
3rd, there is complete circuit protection mechalusm, the brightness of the duty cycle adjustment LED main light sources by adjusting pwm signal,
Protection circuit.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of schematic diagram of pixel type self-adapted car headlamp control system based on DLP of the present utility model；
Fig. 2 be dmd chip micro mirror "ON" and "off" state under light reflectogram.
In figure：1st, image processor, 2, CAN transceiver, 3, MCU chip, 4, DLP control chips, 5, LED drive chip,
6th, LED light source component, 7, dmd chip, 8, match somebody with somebody lens outside.
Embodiment
The utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram,
Only illustrate basic structure of the present utility model in a schematic way, therefore it only shows the composition relevant with the utility model.
A kind of pixel type self-adapted car headlamp control system based on DLP of the present utility model as Figure 1-Figure 2
The specific embodiment of system, including：Image acquisition device, light source driving units, control unit and execution unit.Wherein, light source drives
Unit includes one piece of LED drive chip 5 and LED light source component 6, and LED light source component 6 includes LED main light sources, poly- lens and repaiied
Positive lens.Image acquisition device is connected in CAN, for gathering external image, and the shape that external image is passed through into CAN message
Formula is sent to control unit, and control unit is mainly made up of one piece of DLP control chip 4 and one piece of MCU chip 3, DLP control chips
Connected using iic bus between 4 and MCU chip 3, connected between MCU chip 3 and image processor 1 i.e. host computer using CAN
Connect, pass through the transmission signal of CAN transceiver 2.Execution unit mainly forms by one piece of dmd chip 7 and outside with lens 8, dmd chip 7
It is connected between DLP control chips 4 using multiple signals line.The light that LED main light sources are sent is by poly- lens and amendment lens
Refraction, form corresponding with the micromirror matrix of dmd chip 7 uniform beam, uniform beam is transmitted to the micromirror matrix of dmd chip 7
Speculum on and reflect, the light of reflection pass through it is outer is emitted with lens 8, form required upper beam shape.
Specifically, MCU chip 3 is sent to by CAN message after the collection of image processor 1 external image, MCU chip 3 is right
CAN message parsed and algorithm process after send result to DLP control chips 4, DLP control chips 4 are according to result of calculation
Dmd chip 7 is controlled, the control to vehicle front lighting lamplight type is performed by dmd chip 7, dmd chip 7 is by changing in it
The angle of the tiny mirror of portion's micromirror matrix realizes the "on" and "off" of eyeglass.As shown in Fig. 2 at the eyeglass of dmd chip 7
When "On" state, the light of LED light source is gone out via specified light path and by lens reflecting.Conversely, when the mirror of dmd chip 7
When piece is in "Off" state, the light of LED light source, which will be reflected to non-designated optical path area, to be gone out by lens reflecting,
Thus it can reach the automatic purpose for changing light type.Dmd chip 7 by changing the angle of micro mirror, to DLP throw by the light for reflecting needs
The projection lens of lighting system, the outer lens through car light after refractor reflects emit, and form required vapour
Car upper beam shape, is finally reached abblendbar purpose.
DLP control chips 4 control the opening and closing of LED drive chip 5 by sending the enabled orders of LED.LED drives core
The regulation to the brightness of LED light source component 6 can be achieved by the pwm signal transmitted by reception control unit in piece 5.LED drive chip
5 by its temperature information by the Real-time Feedback of DLP control chips 4 to MCU chip 3, MUC chips are by adjusting the duty of pwm signal
Than the electric current for adjusting LED chip, to ensure the safety of LED chip.
Using headlamp control system of the present utility model, distance light, dipped beam, AFS, ADB anti-glare light function can be by
One lamp is realized, and has higher headlamp resolution ratio.
Specifically, in the present embodiment, the model TJA1041A of CAN transceiver 2, the model of MCU chip 3
The model DLPC120 of TMS320F28023, DLP control chip 4, the model TPS92602 of LED drive chip 5.
Control method using the control system of the pixel type adaptive front lamp based on DLP of the present embodiment is：
1st, to electric in control unit, 3 each module initialization of MCU chip；
2nd, DLP control chips 4 initialize；
3rd, after the completion of above-mentioned initialization, control unit self-test, self-test content includes：Whether operating voltage meets requirement, MCU
Chip 3 and DLP control chips 4 communicate whether the normal, temperature of LED light source component 6 meets to require；
4th, control unit power-on self-test is after, according to the control command of image processor 1, to the micro mirror of dmd chip 7
Matrix is adjusted control.The light that the micromirror matrix reflection of dmd chip 7 needs throws the projection lens of lighting system to DLP, passes through
Outer lens after refractor refraction through car light emits, and forms required headlamp irradiation light shape.
For the ordinary skill in the art, specific embodiment is simply carried out with reference to accompanying drawing to the utility model
Exemplary description, it is clear that the utility model specific implementation is not subject to the restrictions described above, as long as employing of the present utility model
The improvement for the various unsubstantialities that methodology and technical scheme are carried out, or it is not improved by design of the present utility model and technology
Scheme directly applies to other occasions, within the scope of protection of the utility model.
Claims (5)
- A kind of 1. pixel type self-adapted car headlamp control system based on DLP, it is characterised in that including：Image processor (1), described image processor (1) is connected with CAN, for collection vehicle external image；MCU chip (3), the MCU chip (3) receives the CAN message that described image processor (1) is sent, and CAN message is entered Row parsing and calculating；DLP control chips (4), the DLP control chips (4) receive the control information that the MCU chip (3) calculates；Dmd chip (7), the dmd chip (7) receive the control information of DLP control chips (4), and are changed according to control information The angle of the tiny mirror of its internal micromirror matrix；LED light source component (6)；LED drive chip (5), the LED drive chip (5) receives the pwm signal that the MCU chip (3) sends, and drives LED light source component (6) bright is gone out and brightness；The LED light source component (6) sends uniform beam to the inside micromirror matrix of the dmd chip (7), by DMD cores Projected after the inside micromirror matrix reflection of piece (7) by matching somebody with somebody lens (8) outside.
- 2. the pixel type self-adapted car headlamp control system according to claim 1 based on DLP, it is characterised in that The LED light source component (6) includes LED main light sources, poly- lens and amendment lens.
- 3. the pixel type self-adapted car headlamp control system according to claim 1 based on DLP, it is characterised in that The DLP control chips (4) send the opening and closing that the enabled orders of LED control the LED drive chip (5).
- 4. the pixel type self-adapted car headlamp control system according to claim 1 based on DLP, it is characterised in that The temperature information of itself is fed back to MCU chip (3) by the LED drive chip (5) by DLP control chips (4) in real time, described The dutycycle for the pwm pulse signal that MCU chip (3) is sent according to the high high adjustment of LED drive chip (5) temperature, to adjust LED The electric current of driving chip (5), ensure the safety of LED drive chip (5).
- 5. the pixel type self-adapted car headlamp control system according to claim 1 based on DLP, it is characterised in that CAN message is sent to MCU chip (3) by described image processor (1) by CAN transceiver (2).
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| CN108569191A (en) * | 2017-04-19 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of pixel type self-adapted car headlamp control system based on DLP |
| CN108633128A (en) * | 2018-02-09 | 2018-10-09 | 常州星宇车灯股份有限公司 | A kind of the overheat protector control circuit and its control method of LED car lamp |
| CN108674298A (en) * | 2018-03-23 | 2018-10-19 | 常州星宇车灯股份有限公司 | A kind of car lamp control system showing information of vehicles |
| CN110191537A (en) * | 2019-05-27 | 2019-08-30 | 常州星宇车灯股份有限公司 | Car light overheat protector system, the vehicle with it and car light excess temperature protection method |
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| CN110816398A (en) * | 2019-10-09 | 2020-02-21 | 华中科技大学 | Self-adaptive automobile headlamp projection device and method |
| WO2020128548A1 (en) * | 2018-12-21 | 2020-06-25 | Micron Technology, Inc. | Improved head lights of a vehicle |
| CN112824756A (en) * | 2019-11-21 | 2021-05-21 | 沃尔沃汽车公司 | Vehicle exterior lighting module |
| WO2021214262A1 (en) * | 2020-04-23 | 2021-10-28 | Valeo Vision | Method for managing image data, and vehicle lighting system |
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| CN108569191A (en) * | 2017-04-19 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of pixel type self-adapted car headlamp control system based on DLP |
| CN108633128A (en) * | 2018-02-09 | 2018-10-09 | 常州星宇车灯股份有限公司 | A kind of the overheat protector control circuit and its control method of LED car lamp |
| CN108633128B (en) * | 2018-02-09 | 2024-05-24 | 常州星宇车灯股份有限公司 | Over-temperature protection control circuit of LED car lamp and control method thereof |
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| CN110445955B (en) * | 2018-05-02 | 2021-02-26 | 杭州海康威视数字技术股份有限公司 | Light supplementing system and camera |
| CN113165509A (en) * | 2018-12-21 | 2021-07-23 | 美光科技公司 | Improved headlight for vehicle |
| WO2020128548A1 (en) * | 2018-12-21 | 2020-06-25 | Micron Technology, Inc. | Improved head lights of a vehicle |
| CN113661785A (en) * | 2019-04-05 | 2021-11-16 | Zkw集团有限责任公司 | Motor vehicle headlight |
| CN113661785B (en) * | 2019-04-05 | 2024-04-30 | Zkw集团有限责任公司 | Motor vehicle headlight |
| CN110191537A (en) * | 2019-05-27 | 2019-08-30 | 常州星宇车灯股份有限公司 | Car light overheat protector system, the vehicle with it and car light excess temperature protection method |
| CN110816398A (en) * | 2019-10-09 | 2020-02-21 | 华中科技大学 | Self-adaptive automobile headlamp projection device and method |
| CN110816398B (en) * | 2019-10-09 | 2021-06-18 | 华中科技大学 | Self-adaptive automobile headlamp projection device and method |
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| US20210155150A1 (en) * | 2019-11-21 | 2021-05-27 | Volvo Car Corporation | Vehicle exterior lighting module |
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| CN115485169A (en) * | 2020-04-23 | 2022-12-16 | 法雷奥照明公司 | Method for managing image data and vehicle lighting system |
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