CN209676543U

CN209676543U - A kind of control device of vehicle-mounted key panel LED

Info

Publication number: CN209676543U
Application number: CN201920027712.0U
Authority: CN
Inventors: 朱允斌; 汪亮; 汪锋
Original assignee: BEIJING HEGUANGWEIYE SENSING TECHNOLOGY Co Ltd
Current assignee: BEIJING HEGUANGWEIYE SENSING TECHNOLOGY Co Ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2019-11-22
Anticipated expiration: 2029-01-08

Abstract

The utility model relates to technical field of engineering machinery, more particularly to the control device of vehicle-mounted key panel LED a kind of, including LED driver and single-chip microcontroller, single-chip microcontroller is communicated by I2C communication protocol and multiple LED drivers, the output interface of LED driver is parallel with multi-way LED lamp, single-chip microcontroller can be controlled separately the state of every paths of LEDs lamp, and the GPIO of single-chip microcontroller is additionally provided with the RESET connection being connected with LED driver；The utility model is intended to provide a kind of small encapsulation volume, winding displacement and controls the control unit simple and at low cost for being adapted to vehicle-mounted panel regulation.

Description

A kind of control device of vehicle-mounted key panel LED

Technical field

The utility model relates to technical field of engineering machinery, and in particular to a kind of control device of vehicle-mounted key panel LED.

Background technique

The instruction of the function controls such as the light of equipment, air-conditioning, walking, cantilever crane control is needed on engineering machinery vehicle LED light controls, and with the increase of function, the project for needing to indicate is more and more, generally requires to integrate tens LED light, and Each LED light needs are individually controlled.Applying at present mainly has three in the LED control mode of engineering machinery vehicle key panel Kind:

Drive control is directly carried out by triode using the single-chip microcontroller with multiple I/O ports, as shown in Figure 1；2, using shifting Bit register adds triode to carry out drive control, as shown in Figure 1；3, PWM is used to control LED driver to adjust LED, is such as schemed Shown in 1.

But the certain defect existing in the prior art of three of the above mode:

Mode one: since each LED needs individual I/O port control, if 96 LED light of control then need 96 I/O port needs the I/O port quantity of single-chip microcontroller very more along with the I/O port of key, selects single-chip microcontroller extremely difficult, occupies monolithic The resource of machine is very high, and it is at high cost, package dimension is big；Each LED needs an individual triode, then in requisition for 96 three Pole pipe, so that needing to occupy very big PCB space, PCB layout is difficult to design, due to going wrong more than component and cabling is more Probability become larger.

Mode two: controlling driving LED using shift register, if to control 96 paths of LEDs lamps, then needs 12 displacements Register needs 12 GPIO mouthfuls, while needing 12 transistor drive circuits.

Mode three: LED driver (such as chip AN30888A) is adjusted to control LED using PWM, addition will control respectively The light on and off of 96 paths of LEDs lamps then need 96 LED drivers, need 96 GPIO mouthfuls.This mode is compared adjustable with mode one The light intensity of LED light.

Utility model content

The technical issues of solution

For disadvantages mentioned above present in the prior art, the utility model provides the control of vehicle-mounted key panel LED a kind of Device processed, it is desirable to provide a kind of encapsulation volume is small, winding displacement and control is simple and the control at low cost for being adapted to vehicle-mounted panel regulation Unit.

Technical solution

In order to achieve the above object, the utility model is achieved by the following technical programs:

A kind of control device of vehicle-mounted key panel LED, including LED driver and single-chip microcontroller, the single-chip microcontroller pass through I2C Communication protocol is communicated with multiple LED drivers, and the output interface of the LED driver is parallel with multi-way LED lamp, institute To state single-chip microcontroller can be controlled separately the state of every paths of LEDs lamp, and the GPIO of the single-chip microcontroller is additionally provided with to be connected with LED driver RESET connection, the single-chip microcontroller individually control the state of every paths of LEDs lamp by LED driver.

Further, further include DC/DC converter, described in the output end of the DC/DC converter respectively with the list Piece machine and LED driver connect.The DC/DC converter can play the role of security isolation, increase the reliability of entire control structure By force, strong antijamming capability.

Further, the single-chip microcontroller uses 32 ARM type single-chip microcontrollers.

Further, the LED driver selects 16 road constant-current LED driving chips.

Beneficial effect

It is had the following beneficial effects: compared with known publicly-owned technology using technical solution provided by the utility model

1, the utility model is due to only needing an I2C bus and one GPIO mouthfuls, therefore single-chip microcontroller encapsulation volume very little, single Resource needed for piece machine is seldom, and cost has obtained effective control, and PCB layout difficulty reduces.

2, the utility model directly drives LED by LED driver, reduces triode, resistance, capacitor, effective to drop Low cost, the fault point for reducing circuit.

3, the utility model controls LED driver by I2C, different communicatedly by calling to each LED driver Location can be realized the control to different LED light, and control is got up fairly simple, and the operational efficiency of single-chip microcontroller is greatly improved.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described.It should be evident that the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is one schematic diagram of prior art manner；

Fig. 2 is two schematic diagram of prior art manner；

Fig. 3 is three schematic diagram of prior art manner；

Fig. 4 is the control structure schematic diagram of the utility model；

Label in figure respectively represents: 1- single-chip microcontroller；2-LED driver；3-DC/DC converter；4-LED lamp.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, it is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

Below with reference to embodiment, the utility model will be further described.

Embodiment

The control device of a kind of vehicle-mounted key panel LED of the present embodiment, referring to Fig. 4: including LED driver 2 and monolithic Machine 1, single-chip microcontroller 1 are communicated by I2C communication protocol with multiple LED drivers 2, and the output interface of LED driver 2 is parallel with Multi-way LED lamp 4, single-chip microcontroller 1 can be controlled separately the state of every paths of LEDs lamp 4, and the GPIO of single-chip microcontroller 1 is additionally provided with and LED driver 2 The RESET connection being connected.

It further include DC/DC converter 3, the output end of DC/DC converter 3 connects with single-chip microcontroller 1 and LED driver 2 respectively.

Single-chip microcontroller 1 uses 32 ARM type single-chip microcontrollers 1；LED driver 2 selects 16 road constant-current LED driving chips, this implementation The preferred LED drive chip of example is TLC59116.24VDC is wherein converted to by 5VDC by the external power supply of DC/DC converter 3 And 3.3VDC；3.3VDC to single-chip microcontroller 1 and LED driver 2 power supply, 5VDC be used to give LED light 4 power.

Working principle: single-chip microcontroller 1 is by serial data (SDA) and serial time clock line (SCL) in the device for being connected to bus Between transmit information, each LED driver 220 has unique identification address (can be IP address or device identification etc.), And all can serve as a transmitter or receiver (being determined by single-chip microcontroller 1), call different addresses can be realized by I2C Control to each LED driver 2, and then realize the control to every paths of LEDs lamp 4, wherein RESET connection cooperates peripheral hardware physics Switch can be used for each LED driver 2 and carry out Rapid reset, it is convenient to 4 mistake displays of LED light multiple on vehicle-mounted key panel and When handle.

Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these Modify or replace, can't make corresponding technical solution essence be detached from various embodiments of the utility model technical solution spirit and Range.

Claims

1. a kind of control device of vehicle-mounted key panel LED, including LED driver and single-chip microcontroller, it is characterised in that: the monolithic Machine is communicated by I2C communication protocol and multiple LED drivers, and the output interface of the LED driver is parallel with more Paths of LEDs lamp, the GPIO of the single-chip microcontroller are additionally provided with the RESET connection being connected with LED driver, which passes through LED Driver individually controls the state of every paths of LEDs lamp.

2. the control device of vehicle-mounted key panel LED according to claim 1 a kind of, which is characterized in that further include DC/DC Converter, the DC/DC converter connect with the single-chip microcontroller and LED driver respectively.

3. the control device of vehicle-mounted key panel LED according to claim 1 or 2 a kind of, which is characterized in that the monolithic Machine uses 32 ARM type single-chip microcontrollers.

4. the control device of vehicle-mounted key panel LED according to claim 1 a kind of, which is characterized in that the LED driving Device selects 16 road constant-current LED driving chips.