CN208063514U - A kind of LED taillights control circuit - Google Patents
A kind of LED taillights control circuit Download PDFInfo
- Publication number
- CN208063514U CN208063514U CN201820272629.5U CN201820272629U CN208063514U CN 208063514 U CN208063514 U CN 208063514U CN 201820272629 U CN201820272629 U CN 201820272629U CN 208063514 U CN208063514 U CN 208063514U
- Authority
- CN
- China
- Prior art keywords
- led
- mcu
- led drive
- transceiver
- execution unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The utility model discloses a kind of LED taillights control circuit, belongs to automotive lighting field.It includes control unit and execution unit, is connected by UART buses between control unit and execution unit, and control unit includes CAN transceiver, MCU and LDO, and CAN transceiver is connected with MCU, and LDO is that CAN transceiver is powered with MCU；Execution unit includes corresponding connected multiple LED drive chips and multiple constant current loop control modules；The CAN transceiver of control unit receives the dimming commands to every LED in LED light source matrix that host computer issues, and the LED drive chip of execution unit is sent to by UART buses, LED drive chip drives the light on and off of corresponding LED in LED light source matrix according to dimming commands.The utility model is combined by the light on and off of different LED, it can be achieved that diversified lighting effects；Meanwhile the utility model also has the characteristics that simple in structure, integration degree is high.
Description
Technical field
The utility model belongs to automotive lighting field, especially a kind of LED taillights control circuit.
Background technology
The continuous design expanded with LED light source applied in automotive lighting field with LED light source is miniaturized increasingly, people
Requirement to car light is also continuously improved, and no longer contents just to illumination and as simple signal lamp effect.By controlling LED squares
The light on and off of battle array different location LED, can make taillight show various effect, such as：Face letter expressing, dynamic effect, word
Or symbol and breath light and other effects.In this manner, some emotions that can give expression to front truck driver indirectly, make
Taillight plays interactive effect.How to effectively control above-mentioned diversified display effects, and becoming has problem to be solved.
Application No. is 201720364929.1 patents, disclose a kind of more pixelation LED light source control electricity of car rear
Road, including LIN/CAN transceivers, MCU, switching group, LED array group, decompression constant pressure module, source of stable pressure and multiple linear constant current moulds
Group, and the quantity of linear constant current module is no less than the number of LED in LED array group.Each LED is received by LIN/CAN transceivers
The dimming commands of single light source, the break-make by controlling switching group realizes that each LED light source digital PWM dims, various to realize
The lighting effects of change.But in the technical solution of the patent, first, each LED is required for being equipped with corresponding linear constant current
Module, and PWM wave dimming function is realized by the break-make of switching group；As LED numbers are on the increase, entire circuit will become
Must be more complicated, integration degree is also lower；Second, false perception only is carried out to switching group, there is no the events for realizing LED
Barrier management.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of LED taillights control circuit, pass through the bright of different LED
Combination go out, it can be achieved that the diversified lighting effects such as similar face letter expressing, letter symbol, horse race lamp and breath light；Meanwhile also
Have the characteristics that simple in structure, integration degree is high.
To achieve the above object, the utility model uses following technical proposals：
A kind of LED taillights control circuit, it includes control unit and execution unit, is led between control unit and execution unit
It crosses UART buses to be connected, control unit includes CAN transceiver, MCU and LDO, and CAN transceiver is connected with MCU, and LDO receives and dispatches for CAN
Device is powered with MCU；
Execution unit includes multiple LED drive chips and multiple constant current loop control modules, multiple LED drive chips with it is more
A constant current loop control module, which corresponds, to be connected；
The CAN transceiver of control unit receives the dimming commands to every LED in LED light source matrix that host computer issues,
And the LED drive chip of execution unit is sent to by UART buses, LED drive chip drives LED light according to dimming commands
The light on and off of corresponding LED in source matrix.
Further, the MCU of control unit sends fixed fault inquiry order to execution unit by UART buses
LED drive chip, after LED drive chip receives fault inquiry order, in LED light source matrix per LED carry out open circuit with
Short-circuit detecting, and testing result is returned into MCU, then host computer is fed back to by MCU.
Further, the model TPS92661-Q1 of LED drive chip.
Further, 8 LED drive chips are contained up in execution unit, and cascade is used between 8 LED drive chips
Mode connects, and each LED drive chip drives 12 LED.
Advantageous effect：
1. the utility model adds the i.e. alternative application number of 1 LED drive chip by using 1 constant current loop control module
Add 12 switches for 12 constant current modules in 201720364929.1 patent.Which greatly simplifies control circuit design, collection
At change degree also higher.With the increase of LED numbers, this advantage also will become apparent from.
2. application No. is in 201720364929.1 patent, false perception only is carried out to switching group, there is no real
The fault management of existing LED.And the utility model sends fixed fault inquiry order by the MCU of control unit through UART buses
To LED drive chip, after LED drive chip receives fault inquiry order, open circuit and short-circuit detecting are carried out to LED, and will inspection
It surveys result and returns to MCU, then host computer is fed back to by MCU, to realize the fault management of LED.Which greatly enhances LED taillights
The reliability of control circuit further improves the safety of nighttime driving.
Description of the drawings
Fig. 1 is the LED taillight control circuit Organization Charts of one embodiment of the utility model；
In figure：1- control units, 2- execution units, 3- host computers, 4-LED light source matrixs, 11-CAN transceivers, 12-
MCU, 13-LDO, 21-LED driving chip, 22- constant current loop control modules.
Specific implementation mode
The utility model is further illustrated with reference to the accompanying drawings and examples.
The present embodiment proposes a kind of LED taillights control circuit, as shown in Figure 1, it includes left and right control unit 1 and left and right
Execution unit 2, left and right control unit 1 are connected with left and right execution unit 2 by UART buses respectively, and left and right control unit 1 is equal
Including CAN transceiver 11, MCU 12 and LDO 13, CAN transceiver 11 is connected with MCU 12, LDO 13 be CAN transceiver 11 with
MCU 12 powers；
Left and right execution unit 2 includes that 22,8 LED of 8 LED drive chips 21 and 8 constant current loop control modules drive
Dynamic chip 21 is connected with 8 one-to-one correspondence of constant current loop control module 22, and cascade system is used between 8 LED drive chips 21
Connection, each LED drive chip 21 drive 12 LED, then 8 LED drive chips 21 drive 96 LED；Preferably, LED drives
Dynamic chip 21 is the LED drive chip of TI companies, model TPS92661-Q1.
The CAN transceiver 11 of left and right control unit 1 receive that host computer 3 issues respectively to left and right LED light source matrix 4
In dimming commands per LED, and be sent to by UART buses the LED drive chip 21 of left and right execution unit 2, LED drivings
Chip 21 drives the light on and off of corresponding LED in left and right LED light source matrix 4 according to dimming commands.Pass through the light on and off of different LED
Combination is, it can be achieved that the diversified lighting effects such as similar face letter expressing, letter symbol, horse race lamp and breath light.This mode
The quantity of hardware circuit component is greatly reduced while maintaining diversified lighting effects, reduces circuit cost.Together
When, CAN bus and UART buses are used in circuit, simplify connecting line construction, control method flexibility is good, easy to operate.
The MCU 12 of left and right control unit 1 sends fixed fault inquiry order by UART buses and is held respectively to left and right
The LED drive chip 21 of row unit 2, after LED drive chip 21 receives fault inquiry order, to left and right LED light source matrix 4
In open circuit and short-circuit detecting are carried out per LED, and testing result is returned into MCU 12, then host computer 3 is fed back to by MCU 12.
Which greatly enhances the reliabilities of LED taillight control circuits, further improve the safety of nighttime driving.
Limitation to scope of protection of the utility model, those skilled in the art should understand that, in the skill of the utility model
On the basis of art scheme, the various modifications or variations that can be made by those skilled in the art with little creative work still exists
Within the scope of protection of the utility model.
Claims (4)
1. a kind of LED taillights control circuit, it includes control unit (1) and execution unit (2), control unit (1) and executes list
It is connected by UART buses between first (2), it is characterised in that：Described control unit (1) includes CAN transceiver (11), MCU (12)
With LDO (13), CAN transceiver (11) is connected with MCU (12), and LDO (13) is that CAN transceiver (11) is powered with MCU (12)；
The execution unit (2) includes multiple LED drive chips (21) and multiple constant current loop control modules (22), multiple LED
Driving chip (21) is corresponded with multiple constant current loop control modules (22) to be connected；
The CAN transceiver (11) of described control unit (1) receive that host computer (3) issues to every in LED light source matrix (4)
The dimming commands of LED, and it is sent to by UART buses the LED drive chip (21) of execution unit (2), LED drive chip
(21) light on and off of corresponding LED in LED light source matrix (4) are driven according to dimming commands.
2. LED taillights control circuit according to claim 1, it is characterised in that：The MCU (12) of described control unit (1)
Fixed fault inquiry order is sent to the LED drive chip (21) of execution unit (2), LED drive chip by UART buses
(21) after receiving fault inquiry order, to open circuit and short-circuit detecting are carried out in LED light source matrix (4) per LED, and will detection
As a result MCU (12) is returned to, then host computer (3) is fed back to by MCU (12).
3. LED taillights control circuit according to claim 1 or 2, it is characterised in that：The LED drive chip (21)
Model TPS92661-Q1.
4. LED taillights control circuit according to claim 1 or 2, it is characterised in that：In the execution unit (2) at most
Including 8 LED drive chips (21), connected using cascade system between 8 LED drive chips (21), each LED drive chip
(21) 12 LED are driven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820272629.5U CN208063514U (en) | 2018-02-27 | 2018-02-27 | A kind of LED taillights control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820272629.5U CN208063514U (en) | 2018-02-27 | 2018-02-27 | A kind of LED taillights control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208063514U true CN208063514U (en) | 2018-11-06 |
Family
ID=63991123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820272629.5U Active CN208063514U (en) | 2018-02-27 | 2018-02-27 | A kind of LED taillights control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208063514U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108633130A (en) * | 2018-02-27 | 2018-10-09 | 常州星宇车灯股份有限公司 | A kind of LED taillights control circuit |
| CN110177411A (en) * | 2019-05-27 | 2019-08-27 | 常州星宇车灯股份有限公司 | Logo lamp control system, the vehicle with it and logo lamp control method |
-
2018
- 2018-02-27 CN CN201820272629.5U patent/CN208063514U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108633130A (en) * | 2018-02-27 | 2018-10-09 | 常州星宇车灯股份有限公司 | A kind of LED taillights control circuit |
| CN110177411A (en) * | 2019-05-27 | 2019-08-27 | 常州星宇车灯股份有限公司 | Logo lamp control system, the vehicle with it and logo lamp control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208063514U (en) | A kind of LED taillights control circuit | |
| CN112498227B (en) | Automobile dynamic lamp control system and automobile | |
| CN101979260B (en) | Control method for combined taillight of automobile | |
| CN108633130A (en) | A kind of LED taillights control circuit | |
| CN210899763U (en) | Novel automobile indoor lamp control system | |
| CN209746538U (en) | Warning lamp box control circuit based on FPGA | |
| CN205365390U (en) | Driving light between electric automobile day with electric quantity information display function | |
| CN206100551U (en) | Matrix LED headlight | |
| CN211671016U (en) | Intelligent front ceiling lamp module and system integrating light control in vehicle | |
| CN2810051Y (en) | Passenger car mounted network control system | |
| CN202855274U (en) | Time-sequence control circuit, backlight scanning driving system and backlight source | |
| CN202357955U (en) | Automobile light controller based on CAN (controller area network) bus | |
| CN202106904U (en) | High-position braking lamp displaying device | |
| CN209659687U (en) | A kind of car light mould group and car lamp device | |
| CN107734741A (en) | Variable color-temperature front combination lamp | |
| CN212243143U (en) | Steering lamp control system | |
| CN216280956U (en) | Starry sky mode vehicle-mounted atmosphere lamp system | |
| CN112885294B (en) | LED drive chip, drive circuit and display unit of dual signal source input | |
| CN201780740U (en) | Light emitting diode (LED) vehicular display system | |
| CN114435231A (en) | Automobile lamp control system | |
| CN206446514U (en) | A kind of LED location lamp for showing battery electric quantity | |
| CN212447284U (en) | Lamp with reversing warning function | |
| CN210274621U (en) | Vehicle grille lamp control system | |
| CN201655250U (en) | Controlling device for LED taxi toplight | |
| CN110525330A (en) | The warning device that stops in emergency for car |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |