CN108834267A - Flowing water taillight control circuit - Google Patents
Flowing water taillight control circuit Download PDFInfo
- Publication number
- CN108834267A CN108834267A CN201810992609.XA CN201810992609A CN108834267A CN 108834267 A CN108834267 A CN 108834267A CN 201810992609 A CN201810992609 A CN 201810992609A CN 108834267 A CN108834267 A CN 108834267A
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- Prior art keywords
- mcu
- light source
- linear drive
- led
- led light
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- 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.)
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 230000009021 linear effect Effects 0.000 claims abstract description 54
- 230000003139 buffering effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The present invention relates to a kind of flowing water taillight control circuits, belong to car light control field.The circuit includes multiple LED light sources, multiple LED linear drive modules, MCU and MCU power module；Each LED light source is correspondingly connected with a LED linear drive module；Multiple LED linear drive modules are directly powered by vehicle end power supply；MCU picks up end power supply by MCU power module, and vehicle end power supply is converted into powering after voltage needed for MCU to MCU；MCU is also connect with vehicle end signal control terminal, multiple LED linear drive modules are also connect with MCU, MCU obtains the LED light source that vehicle end signal control terminal is sent and controls signal, then controls signal determination according to LED light source and the corresponding LED linear drive module of the LED light source to be lighted is driven to work.The present invention, which realizes, shares kernel control module, reduces the quantity of MCU and DC/DC, is effectively reduced the cost that vehicle taillight realizes dynamic effect.
Description
Technical field
The present invention relates to car light control field, in particular to a kind of flowing water taillight control circuit.
Background technique
The automobile of volume production at present, signal lamp function are also increasingly to dazzle cruel, timing flowing water, and the functions such as play the piano are also slowly
It is universal to open, because increasing timing control, realize that these functions are typically necessary increase single-chip microcontroller, and be typically now
One lamp is controlled with a single-chip microcontroller, results in higher cost in this way.
As shown in Figure 1, in two kinds of situation, when the electric current of system is little, when heat emulate that all there is no problem, only with linearly
The driving of circuit solid line LED, then dotted portion directly feeds linear drive circuit there is no need to, external power supply, MCU is from outside
Starting coherent signal is obtained, control of the Linear Driving realization to LED is then controlled, realizes scheduled display effect；And work as system
When can no longer meet cooling requirements by the purely linear circuit of heat emulation when electric current is larger, then needs to increase DC/DC circuit, improve
Efficiency reduces thermal losses, other circuits are consistent with purely linear circuit, and the quantity of linear circuit depends on the quantity of LED.
Scheme shown in FIG. 1 is functionally able to satisfy requirement, the area angle occupied from cost with wiring board
It sees, is currently that a lamp will be to cover complete foregoing circuit, then being exactly and the quantity multiple proportion of lamp, spy on device cost
It is not the parts that DC/DC and MCU two parts are in the entire system higher cost, by present scheme, the cost meeting of this part
It is multiplied as the quantity of lamp；Simultaneously as each lamp will be comprising upper figure so circuit, so the face of the PCB occupied
Product also accordingly increases, and area increases the increase that bring is exactly cost.In addition, because each lamp is an independent part,
It does not communicate between each other, therefore in Dynamically Announce, there are nonsynchronous problems.
Summary of the invention
It is an object of the invention in view of the above-mentioned problems, a kind of flowing water taillight control circuit is provided, by sharing core
Control module reduces the quantity of MCU and DC/DC, while synchronism is more preferable.
The object of the present invention is achieved like this：
A kind of flowing water taillight control circuit, including multiple LED light sources, multiple LED linear drive modules, a MCU and one
A MCU power module；
Each LED light source is correspondingly connected with the LED linear drive module；Multiple LED linears drive mould
Block is directly powered by vehicle end power supply；The MCU picks up end power supply by the MCU power module, by vehicle end power supply
It powers after voltage needed for being converted into the MCU to the MCU；The MCU is also connect with vehicle end signal control terminal, multiple described
LED linear drive module is also connect with the MCU, and the MCU obtains the LED light source that vehicle end signal control terminal is sent and controls letter
Number, signal determination is then controlled according to the LED light source and the corresponding LED linear of the LED light source to be lighted is driven to drive mould
Block work.
Preferably, vehicle end power supply passes through connector and multiple LED linear drive modules and the MCU power supply mould
Block connection, the vehicle end signal control terminal are connect also by the connector with the MCU.
Preferably, DC/DC module is also connected between multiple LED linear driving moulds and the connector.
Preferably, the MCU and the connector are also connected with CAN/LIN transceiver, what vehicle end signal control terminal was sent
LED light source control signal enters the MCU after the connector and the CAN/LIN transceiver.
Preferably, part or all of LED linear drive module and MCU described in multiple LED linear drive modules
In on same pcb board.
Preferably, the LED linear drive module on same pcb board is not located at the MCU and is equipped with the first buffering
Device, the MCU are equipped with the second buffer, and first buffer matches with second buffer；
The MCU sends the instruction for driving the LED linear drive module work by second buffer；
The LED linear drive module receives described instruction by first buffer.
Preferably, not with the MCU LED linear drive module being located on same pcb board and adopted between the MCU
With serial communication modes.
Preferably, each promising unique identifiable ID of the LED light source configuration, the LED light source controls to be wrapped in signal
Containing id information, the MCU determines the LED light source to be lighted by the id information.
Preferably, the LED light source includes one or more LED chips.
Preferably, the LED light source control signal also includes to light sequence and/or graphical information.
Beneficial effects of the present invention are：
1) it realizes and shares kernel control module, reduce the quantity of MCU and DC/DC, it is real to be effectively reduced vehicle taillight
The cost of existing dynamic effect.
2) the taillight effect of vehicle is uniformly controlled by a nucleus module, is entirety on realizing effect, synchronous and whole
Body effect is much larger than traditional mode individually controlled.
Detailed description of the invention
Fig. 1 shows existing taillight control principle block diagram；
Fig. 2 shows the functional block diagrams of one embodiment of flowing water taillight control circuit of the present invention.
Specific embodiment
Combined with specific embodiments below and attached drawing, the present invention is further explained.
As shown in Fig. 2, a kind of flowing water taillight control circuit, includes at least multiple LED light sources 101, multiple LED linears drive
102, MCU103 and MCU power modules 104 of module.
Each LED light source 101 is correspondingly connected with a LED linear drive module 102.
Multiple LED linear drive modules 102 are directly powered by vehicle end power supply, i.e., are only powered by linear circuit
(bold portion in Fig. 2), but such power supply mode is only limitted to use when system power is little, can determine whether to adopt by heat emulation
With such mode.It can be specifically attached by connector 105 between LED linear drive module 102 and vehicle end power supply.When passing through
Heat emulation learns that system power is larger, when purely linear circuit can no longer meet cooling requirements, preferably drives in multiple LED linears
DC/DC module 106 (dotted portion in Fig. 2) is added between mould and connector 105, to improve efficiency reduction thermal losses.Here DC/
The output of DC module 106 is connected with each LED linear drive module 102, the multiplexing of solid line DC/DC module 106.
MCU103 picks up end power supply by MCU power module 104, after vehicle end power supply is converted into voltage needed for MCU103
It powers to MCU103；MCU103 is also connect with vehicle end signal control terminal.Specifically, between MCU power module 104 and vehicle end power supply
And it is attached by connector 105 between MCU103 and vehicle end signal control terminal.In addition, MCU103 and connector 105
Between can also connect CAN/LIN transceiver 107 (dotted portion in Fig. 2), vehicle end signal control terminal send LED light source control
Signal enters back into MCU103 after connector 105 and CAN/LIN transceiver 107.
Multiple LED linear drive modules 102 are also connect with MCU103, and the multiplexing of MCU103 is realized with this.
The characteristics of in view of vehicle body, car light of automobile point or so, some is there are also A, B, C lamp, not in a lamp body, then
Wiring board will be dispersed in different lamp bodies, and the control section of core is shared, thus dispersion wiring board need and
Core control panel is communicated, i.e., part LED linear drive module 102 and MCU103 be not in multiple LED linear drive modules 102
On same pcb board, in this case, the cost in view of distance and wiring between each wiring board is needed, the communication between plate is (no
With the news all between the MCU103 LED linear drive module 102 being located on same pcb board and MCU103) led to using serial
News mode generally has I2C/SPI/RS232/RS485 etc., is primarily to see the string of MCU103 and the support of LED linear drive module 102
Line mode.
By taking common I2C as an example, general serial communication mode is for the communication in plate, if logical between being used for plate
News, then need to avoid signal enhancing the increase because of transmission range signal waveform is caused not meet protocol requirement, therefore in circuit
Upper needs increase a pair of of driving (i.e. buffer), are respectively used to transmitting terminal and receiving end.Specifically, it be not located at together with MCU103
LED linear drive module 102 on one pcb board is equipped with the first buffer 108, and MCU103 is equipped with the second buffer 109, the
One buffer 108 matches with the second buffer 109；MCU103 sends driving LED linear by the second buffer 109 and drives mould
The instruction that block 102 works；LED linear drive module 102 receives instruction by the first buffer 108.
MCU103 obtains the LED light source that vehicle end signal control terminal is sent and controls signal, then controls signal according to LED light source
It determines and the corresponding LED linear drive module 102 of LED light source 101 to be lighted is driven to work.Specifically, each LED light source
The promising unique identifiable ID of 101 configurations, it includes id information that LED light source, which controls in signal, and LED light source 101 described here wraps
Containing one or more LED chips, LED light source control signal also includes to light sequence and/or graphical information.MCU103 according to
LED light source controls the ID in signal and determines the LED light source 101 to be lighted, and then MCU103 sends a command to the LED light source
LED linear drive module 102 corresponding to 101 with drive the module work, MCU103 send instruction also include light it is suitable
Sequence and/or graphical information (these Information inheritings control signal in LED light source), after LED linear drive module 102 receives instruction,
Can according in instruction light sequence and/or graphical information lights LED chip in LED light source 101 so that LED chip is by referring to
It enables and requires to light.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of flowing water taillight control circuit, which is characterized in that including multiple LED light sources, multiple LED linear drive modules, one
A MCU and MCU power module；
Each LED light source is correspondingly connected with the LED linear drive module；Multiple LED linear drive modules are equal
It is directly powered by vehicle end power supply；The MCU picks up end power supply by the MCU power module, and vehicle end power supply is converted
The MCU is given to power at after voltage needed for the MCU；The MCU is also connect with vehicle end signal control terminal, multiple LED lines
Property drive module also connect with the MCU, the MCU obtains the LED light source that vehicle end signal control terminal is sent and controls signal, so
Signal determination is controlled according to the LED light source afterwards and drives the corresponding LED linear drive module work of the LED light source to be lighted
Make.
2. flowing water taillight control circuit according to claim 1, which is characterized in that vehicle end power supply by connector with
Multiple LED linear drive modules are connected with the MCU power module, and the vehicle end signal control terminal is also by the connection
Device is connect with the MCU.
3. flowing water taillight control circuit according to claim 2, which is characterized in that drive mould in multiple LED linears
DC/DC module is also connected between the connector.
4. flowing water taillight control circuit according to claim 2, which is characterized in that the MCU also connects with the connector
It is connected to CAN/LIN transceiver, the LED light source control signal that vehicle end signal control terminal is sent is through the connector and the CAN/
The MCU is entered after LIN transceiver.
5. flowing water taillight control circuit according to claim 1 or 2, which is characterized in that multiple LED linears drive mould
Part or all of LED linear drive module and the MCU are located on same pcb board in block.
6. flowing water taillight control circuit according to claim 5, which is characterized in that be not located at same pcb board with the MCU
On the LED linear drive module be equipped with the first buffer, the MCU be equipped with the second buffer, it is described first buffering
Device matches with second buffer；
The MCU sends the instruction for driving the LED linear drive module work by second buffer；
The LED linear drive module receives described instruction by first buffer.
7. flowing water taillight control circuit according to claim 6, which is characterized in that be not located at same pcb board with the MCU
On the LED linear drive module and the MCU between use serial communication modes.
8. flowing water taillight control circuit according to claim 1, which is characterized in that each LED light source configuration is promising
Unique identifiable ID, it includes id information that the LED light source, which controls in signal, and the MCU determines institute by the id information
The LED light source to be lighted.
9. flowing water taillight control circuit according to claim 8, which is characterized in that the LED light source include one or
Multiple LED chips.
10. flowing water taillight control circuit according to claim 8, which is characterized in that the LED light source control signal also wraps
Containing light sequence and/or graphical information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810992609.XA CN108834267A (en) | 2018-08-29 | 2018-08-29 | Flowing water taillight control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810992609.XA CN108834267A (en) | 2018-08-29 | 2018-08-29 | Flowing water taillight control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108834267A true CN108834267A (en) | 2018-11-16 |
Family
ID=64151538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810992609.XA Pending CN108834267A (en) | 2018-08-29 | 2018-08-29 | Flowing water taillight control circuit |
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-
2018
- 2018-08-29 CN CN201810992609.XA patent/CN108834267A/en active Pending
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