CN107734750A - Based on hardware time-sharing multiplex LED drive system - Google Patents
Based on hardware time-sharing multiplex LED drive system Download PDFInfo
- Publication number
- CN107734750A CN107734750A CN201711043849.7A CN201711043849A CN107734750A CN 107734750 A CN107734750 A CN 107734750A CN 201711043849 A CN201711043849 A CN 201711043849A CN 107734750 A CN107734750 A CN 107734750A
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- China
- Prior art keywords
- chip microcomputer
- input
- drive system
- dcdc
- sharing multiplex
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Classifications
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- 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]
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
It is an object of the invention to provide one kind to be based on hardware time-sharing multiplex LED drive system, and single-chip microcomputer is connected with least three input modules, and single-chip microcomputer is connected with least three switch elements, and single-chip microcomputer produces PWM ripples and exported to switch element；Switch element is connected with LED lamp module；At least three input module is connected with DCDC drive circuits jointly；DCDC drive circuits are connected at least three switch elements.On the premise of DCDC all the way drives, output end number is determined using the number of single-chip microcomputer reading input, produce multi-channel PWM square wave controlling switch unit, within the cycle of a determination, divide multiple time point regions, each output end different corresponding to time point region, so as to realize multiple-channel output；Each function inputs plant-grid connection, single-chip microcomputer can read input voltage, it is determined that there is input on which road, so as to light corresponding LED or all light.
Description
Technical field
The present invention relates to the utilization of LED drive circuit system, more particularly to one kind to be based on hardware time-sharing multiplex LED drivetrains
System.
Background technology
LED illumination technology has had been applied in each different electronic applications, for example, architectural lighting, vehicle head taillight,
Backlight of LCD liquid crystal displays etc..Compared with traditional light source such as incandescent lamp and fluorescent lamp, LED has significant advantage, including
Efficiently, good directionality and colour stability, very high reliability, longer seeervice cycle, small size and Environmental security
Property.
Simultaneously on the premise of ripe LED actuation techniques maturation, people start to pursue more in the case where realizing function
Cost-effective scheme.Such as design and realize that two-way buck is exported in the case of single IC, also do some letters in output end
Single switch realizes that two-way exports.But these design synthesis get up to be also similar to the method that a few road DCDC are combined, most
Count eventually to be comparable to save the cost of one to several IC chip, therefore do not have too big competition with other design
Advantage.The present invention is only with the method for the additional single-chip microcomputer of DCDC circuits all the way, you can the method for realizing LED multi-path driving.And can
To save substantial amounts of cost.
The content of the invention
To solve the above problems, the present invention, which provides one kind, is based on hardware time-sharing multiplex LED drive system, driven in DCDC all the way
On the premise of dynamic, output end number is determined using the number of single-chip microcomputer reading input, produces multi-channel PWM square wave controlling switch
Unit, within the cycle of a determination, divide multiple time point regions, different output end corresponding to each time point region,
So as to realize multiple-channel output；Each function inputs plant-grid connection, single-chip microcomputer can read input voltage, it is determined that there is input on which road,
So as to light corresponding LED or all light；Solves produced problem in background technology.
It is an object of the invention to provide one kind to be based on hardware time-sharing multiplex LED drive system, includes single-chip microcomputer, the list
Piece machine is connected with least three input modules, and single-chip microcomputer is connected with least three switch elements, single-chip microcomputer produce PWM ripples export to
Switch element；Switch element is connected with LED lamp module；At least three input module is connected with DCDC drive circuits jointly,
Three input module input filters give DCDC drive circuits；DCDC drive circuits are connected at least three switch elements.
Further improvement is that：At least three input module is also connected with LDO modules jointly, and LDO modules are connected to
On single-chip microcomputer.
Further improvement is that：At least there are four tunnel timer modules, wherein timer mould all the way inside the single-chip microcomputer
Block is used for producing the cycle, and other at least three tunnel timer modules are used for producing the PWM ripples output of three tunnel independences.
Further improvement is that：The LED lamp module has Thermal feedback circuit and LED to divide Bin circuits.
Further improvement is that：The input module includes the EMC protection circuitry and reverse connection prevention protection circuit of series connection.
Beneficial effects of the present invention：The present invention reads input on the premise of DCDC all the way drives, using single-chip microcomputer
Number determines output end number, produces multi-channel PWM square wave controlling switch unit, within the cycle of a determination, division is multiple
Time point region, different output end corresponding to each time point region, so as to realize multiple-channel output；Each function inputs electricity
Source is accessed, and single-chip microcomputer can read input voltage, it is determined that there is input on which road, so as to light corresponding LED or all light.
Brief description of the drawings
Fig. 1 is the functional block diagram of the present invention.
Fig. 2 is three road time-sharing multiplex circuit diagrams of concrete mode of the present invention.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, the embodiment
It is only used for explaining the present invention, is not intended to limit the scope of the present invention..
As illustrated in fig. 1 and 2, the present embodiment provides one kind and is based on hardware time-sharing multiplex LED drive system, includes monolithic
Machine, the single-chip microcomputer are connected with three input modules, and single-chip microcomputer is connected with three switch elements, and single-chip microcomputer produces the output of PWM ripples
To switch element；Switch element is connected with LED lamp module；Three input modules are connected with DCDC drive circuits jointly, and three
Individual input module input filter gives DCDC drive circuits；DCDC drive circuits are connected on three switch elements.Described three defeated
Enter module and be also connected with LDO modules jointly, LDO modules are connected on single-chip microcomputer.There are No. four timers inside the single-chip microcomputer
Module, wherein timer module is used for producing the cycle all the way, other three tunnels timer module is used for producing the PWM ripples of three tunnel independences
Output.The LED lamp module has Thermal feedback circuit and LED to divide Bin circuits.The EMC that the input module includes series connection is protected
Protection circuit and reverse connection prevention protection circuit.
On the premise of DCDC all the way drives, output end number is determined using the number of single-chip microcomputer reading input, is produced
Raw multi-channel PWM square wave controlling switch unit, within the cycle of a determination, divides multiple time point regions, each time point area
Different output end corresponding to domain, so as to realize multiple-channel output；Each function inputs plant-grid connection, single-chip microcomputer can read input
Voltage, it is determined that there is input on which road, so as to light corresponding LED or all light.
U1 in Fig. 2, U5, U6 is the EMC protection circuitry of input, for filtering out for ESD and surge；U7, U8, U9 are anti-
Reverse-connection protection circuit；U2 is LDO, i.e., 5V output circuits provide power supply for MCU；U3 is single-chip microcomputer；U10, U11, U12 are switch
Unit；U13, U14, U15 are LED lamp panel, have Thermal feedback circuit and LED to divide Bin circuits on lamp plate.
There are four tunnel timer modules inside single-chip microcomputer, wherein being used for producing the cycle all the way, other 3 tunnels are used for producing 3 tunnels
Independent PWM ripples output.After 3 road power supply electrifying, single-chip microcomputer U3 can detect the signal of three tunnels input.Then by a cycle point
Into 3 parts, the time that wherein part 1 is opened as U10, U11, U12 are closed, and are produced PWM ripples driving U10, are lighted correspondingly
Time for being opened as U11 of part 2, U10, U12 are closed, are produced PWM ripples driving U11, light corresponding U14.Third portion
The time opened as U12, U10, U11 are closed, and produce PWM ripples driving U12.Single-chip microcomputer U3 reads the heat on U13, U14, U15
Feedback voltage and divide the ohmically voltages of Bin, single-chip microcomputer U3 adjusts respective PWM dutycycle according to the value of reading, reaches control
Make the effect of electric current on each paths of LEDs.
Claims (5)
1. one kind is based on hardware time-sharing multiplex LED drive system, include single-chip microcomputer, it is characterised in that：The single-chip microcomputer connection
There are at least three input modules, single-chip microcomputer is connected with least three switch elements, and single-chip microcomputer generation PWM ripples export single to switch
Member；Switch element is connected with LED lamp module；At least three input module is connected with DCDC drive circuits jointly, and three defeated
Enter module input filter and give DCDC drive circuits；DCDC drive circuits are connected at least three switch elements.
2. it is based on hardware time-sharing multiplex LED drive system as claimed in claim 1, it is characterised in that：At least three input
Module is also connected with LDO modules jointly, and LDO modules are connected on single-chip microcomputer.
3. it is based on hardware time-sharing multiplex LED drive system as claimed in claim 1, it is characterised in that：Inside the single-chip microcomputer extremely
There are four tunnel timer modules less, wherein timer module is used for producing the cycle all the way, other at least three tunnel timer modules are used
To produce the output of the PWM ripples of three tunnel independences.
4. it is based on hardware time-sharing multiplex LED drive system as claimed in claim 1, it is characterised in that：The LED lamp module has heat
Feedback circuit and LED divide Bin circuits.
5. it is based on hardware time-sharing multiplex LED drive system as claimed in claim 1, it is characterised in that：The input module includes
There are the EMC protection circuitry and reverse connection prevention protection circuit of series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043849.7A CN107734750A (en) | 2017-10-31 | 2017-10-31 | Based on hardware time-sharing multiplex LED drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043849.7A CN107734750A (en) | 2017-10-31 | 2017-10-31 | Based on hardware time-sharing multiplex LED drive system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107734750A true CN107734750A (en) | 2018-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711043849.7A Pending CN107734750A (en) | 2017-10-31 | 2017-10-31 | Based on hardware time-sharing multiplex LED drive system |
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| Country | Link |
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| CN (1) | CN107734750A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109548243A (en) * | 2018-12-26 | 2019-03-29 | 马瑞利汽车零部件(芜湖)有限公司 | A kind of headlight fictitious load circuit arrangement |
| CN110390913A (en) * | 2019-06-26 | 2019-10-29 | 昆山龙腾光电有限公司 | Driving circuit, back light system and display device |
| CN111565494A (en) * | 2020-07-10 | 2020-08-21 | 深圳市全智芯科技有限公司 | LED lamp control circuit and baton |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202014395U (en) * | 2011-01-11 | 2011-10-19 | 天利半导体（深圳）有限公司 | Multichannel PWM (pulse-width modulation) driving chip LED (light-emitting diode) lamp driving time-sharing multiplex structure |
| CN204616164U (en) * | 2015-05-08 | 2015-09-02 | 湖南工业大学 | The circuit of the multiple LED brightness of a kind of single live wire far distance controlled |
| CN105554965A (en) * | 2016-02-24 | 2016-05-04 | 西南交通大学 | Topology of bus current complementary time division multiplexing constant current output LED driver and control method thereof |
| CN106658821A (en) * | 2016-10-26 | 2017-05-10 | 华南理工大学 | Intelligent LED illumination system based on non-visual photo-biological effect and the control method thereof |
-
2017
- 2017-10-31 CN CN201711043849.7A patent/CN107734750A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202014395U (en) * | 2011-01-11 | 2011-10-19 | 天利半导体（深圳）有限公司 | Multichannel PWM (pulse-width modulation) driving chip LED (light-emitting diode) lamp driving time-sharing multiplex structure |
| CN204616164U (en) * | 2015-05-08 | 2015-09-02 | 湖南工业大学 | The circuit of the multiple LED brightness of a kind of single live wire far distance controlled |
| CN105554965A (en) * | 2016-02-24 | 2016-05-04 | 西南交通大学 | Topology of bus current complementary time division multiplexing constant current output LED driver and control method thereof |
| CN106658821A (en) * | 2016-10-26 | 2017-05-10 | 华南理工大学 | Intelligent LED illumination system based on non-visual photo-biological effect and the control method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109548243A (en) * | 2018-12-26 | 2019-03-29 | 马瑞利汽车零部件(芜湖)有限公司 | A kind of headlight fictitious load circuit arrangement |
| CN110390913A (en) * | 2019-06-26 | 2019-10-29 | 昆山龙腾光电有限公司 | Driving circuit, back light system and display device |
| CN111565494A (en) * | 2020-07-10 | 2020-08-21 | 深圳市全智芯科技有限公司 | LED lamp control circuit and baton |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180223 |
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| RJ01 | Rejection of invention patent application after publication |