CN104219815A - A LED orientation signal light and drive circuit thereof - Google Patents
A LED orientation signal light and drive circuit thereof Download PDFInfo
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- CN104219815A CN104219815A CN201310209564.1A CN201310209564A CN104219815A CN 104219815 A CN104219815 A CN 104219815A CN 201310209564 A CN201310209564 A CN 201310209564A CN 104219815 A CN104219815 A CN 104219815A
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- 230000005669 field effect Effects 0.000 claims description 27
- 239000003990 capacitor Substances 0.000 claims description 16
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- 238000005070 sampling Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract 2
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- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- 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
The inventive embodiments disclose a drive circuit for a light emitting diode (LED) orientation signal light. The drive circuit comprises: a conversion module, which is connected with a battery and the LED , for use in regulating the operating voltage of the LED and keeping the stability of the LED's operating voltage; an acquisition module, which is connected with the conversion module, for use in acquiring the acquired voltage varying with the change of the operating voltage; a control module, which is connected with the acquisition module, for use in receiving the acquired voltage, adjusting the operating current of the LED according to the comparison of the acquired voltage to the preset voltage threshold, in order to operate the LED stably. The inventive embodiments also provide a LED orientation signal light. The drive circuit can adjust the voltage accordingly upon the battery output voltage changes, improve the performance and stability of the light and the operating efficiency of the battery, and prolong the lifespan of the battery and the light.
Description
Technical field
The present invention relates to electronic applications, relate in particular to a kind of LED bearing signal lamp and drive circuit thereof.
Background technology
Stability and life-span that light fixture is used are extremely important, and daily life and work are had to very important impact.For making battery-powered light fixture, its battery powered stability is to weigh the whole stability in use of light fixture and the important indicator in life-span.At present, Light-Emitting Diode (LED) is widely used in illumination or signal lamp field, and the feature of its long-life and low-power consumption has won users' welcome.Uses of can not directly powering of the light fixture of LED illumination, so LED lamp is during as illuminating lamp or signal lamp use, and corresponding power drives need to be provided.In prior art, the drive circuit lower cost solution of LED bearing signal lamp mainly adopts a resistance to connect with LED lamp, adopt the resistance can current limliting, guarantee that electric current is in the allowed band of LED lamp group, simultaneously can step-down, to guarantee that LED bearing signal modulating voltage is in its allowed band.
If employing sort circuit, when cell voltage is high, the electric energy that current-limiting resistance consumption is a large amount of, circuit efficiency is low, and after cell voltage declines, the operating current of LED bearing signal lamp can be along with decline, cause the brightness of light fixture to meet the demands, the time that maintains normal brightness is short.Therefore, sort circuit not only efficiency is low, and poor performance.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of LED bearing signal lamp and drive circuit thereof are provided.Can when cell output voltage changes, adjust voltage accordingly, improve the performance of light fixture and the operating efficiency of stability and battery, extend the useful life of battery and light fixture.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of LED bearing signal lamp drive circuit, comprising:
Modular converter, is connected respectively with Light-Emitting Diode with battery, for regulating the operating voltage of light-emitting diode, keeps the stable operating voltage of described Light-Emitting Diode;
Acquisition module, is connected with described modular converter, for gathering the collection voltage changing according to described operating voltage;
Control module, is connected with described acquisition module, for receiving described collection voltage, according to the situation of described collection voltage and predetermined voltage threshold comparison, adjusts the operating current of described light-emitting diode so that described Light-Emitting Diode steady operation.
Wherein, described modular converter comprises inductance, diode, field effect transistor and the first divider resistance, one termination anode of described inductance and the negative pole of described Light-Emitting Diode, the drain electrode of field effect transistor described in another termination, the source electrode of described field effect transistor connects described first divider resistance one end, grid connects described control module, described the first divider resistance other end ground connection, the positive pole of described diode connects the common node of described inductance and the drain electrode of described field effect transistor, and negative pole connects the positive pole of described light-emitting diode.
Wherein, described modular converter also comprises:
The first filter capacitor, the common node of inductance and described Light-Emitting Diode negative pole described in described the first filter capacitor one termination, the negative pole of diode and the positive pole of Light-Emitting Diode described in another termination.
Wherein, described acquisition module comprises the first current-limiting resistance and the second filter capacitor, the common node of field effect transistor source electrode and described the first divider resistance described in described the first current-limiting resistance one termination, control module described in another termination, the common node of the first current-limiting resistance and described control module described in described the second filter capacitor one termination, other end ground connection.
Wherein, described control module comprises single-chip microcomputer, and the power supply input pin of described single-chip microcomputer connects anode, grounding pin ground connection, sampling pin connects the common node of described the first current-limiting resistance and described the second filter capacitor, and PWM output pin connects the grid of described field effect transistor.
Wherein, also comprise:
Switch module, is connected with described control module, for controlling the operating state of described control module.
Wherein, described switch module comprises switch and pull-up resistor, described switch one end ground connection, the switch pin of single-chip microcomputer described in another termination, described pull-up resistor one termination anode, the common node of switch and described single-chip microcomputer switch pin described in another termination.
Wherein, described field effect transistor is N-type field effect transistor.
Wherein, described battery is rechargeable battery, and the model of described single-chip microcomputer is HT46R01C.
Correspondingly, the embodiment of the present invention also provides a kind of LED bearing signal lamp, comprising: circuit as above.
Implement the embodiment of the present invention, there is following beneficial effect:
The collection voltage changing according to Light-Emitting Diode operating voltage by acquisition module collection, and export control module to as the foundation of controlling, control module is when gathering voltage lower than predetermined voltage threshold, heighten the operating current of Light-Emitting Diode, when gathering voltage higher than predetermined voltage threshold, turn down the operating current of Light-Emitting Diode, thereby the operating current of guaranteeing light-emitting diode is stable so that Light-Emitting Diode steady operation, improved the electrical efficiency of drive circuit, guarantee the job stability of Light-Emitting Diode, extended the useful life of light fixture.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the connection diagram of the first embodiment of drive circuit of the present invention;
Fig. 2 is the circuit diagram of the second embodiment of drive circuit of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope that the present invention drives.
Please refer to Fig. 1, is the connection diagram of the first embodiment of drive circuit of the present invention, and in the present embodiment, described circuit comprises: revolving die piece 1, acquisition module 2, control module 3.
Described modular converter 1 is connected respectively with Light-Emitting Diode with battery, for regulating the operating voltage of light-emitting diode, keeps the stable operating voltage of described Light-Emitting Diode;
Described acquisition module 2 is connected with described modular converter 1, for gathering the collection voltage changing according to described operating voltage;
Described control module 3 is connected with described acquisition module 2, for receiving described collection voltage, according to the situation of described collection voltage and predetermined voltage threshold comparison, adjusts the operating current of described light-emitting diode so that described Light-Emitting Diode steady operation.
Wherein, described battery is rechargeable battery, and load can be light-emitting diode, certainly, can be also other light-emitting components or dissipative cell as motor etc.
The collection voltage changing according to Light-Emitting Diode operating voltage by acquisition module collection, and export control module to as the foundation of controlling, control module is when gathering voltage lower than predetermined voltage threshold, heighten the operating current of Light-Emitting Diode, when gathering voltage higher than predetermined voltage threshold, turn down the operating current of Light-Emitting Diode, thereby the operating current of guaranteeing light-emitting diode is stable so that Light-Emitting Diode steady operation, improved the electrical efficiency of drive circuit, guarantee the job stability of Light-Emitting Diode, extended the useful life of light fixture.
Alternatively, can also configure a switch module and be connected with described control module 3, for controlling the operating state of described control module 3.When battery is normally worked, without starting described control module 3 work, thereby reduce circuit power consumption like this.At cell voltage, occur uprising or during the labile state such as step-down, by described switch module, start described control module 3.
Please refer to Fig. 2, is the circuit diagram of the second embodiment of drive circuit of the present invention, and in the present embodiment, described circuit comprises: modular converter, acquisition module, control module, switch module.
Described modular converter is connected respectively with D3 with Light-Emitting Diode D2 with battery BT, for regulating the operating voltage of light-emitting diode D2, D3, keeps the stable operating voltage of described Light-Emitting Diode D2, D3;
Described acquisition module is connected with described modular converter, for gathering the collection voltage changing according to described operating voltage;
Described control module is connected with described acquisition module, be used for receiving described collection voltage, according to the situation of described collection voltage and predetermined voltage threshold comparison, adjust the operating current of described light-emitting diode D2, D3 so that described Light-Emitting Diode D2, D3 steady operation.
Described switch module is connected with described control module, for controlling the operating state of described control module.
Particularly, described modular converter comprises inductance L, diode D1, field effect transistor Q1 and the first divider resistance R1, one termination battery BT positive pole of described inductance L and the negative pole of described Light-Emitting Diode D2, D3, the drain electrode of field effect transistor Q1 described in another termination, the source electrode of described field effect transistor Q1 connects described first divider resistance R1 one end, grid connects described control module, described the first divider resistance R1 other end ground connection, the positive pole of described diode D1 connects the common node of described inductance L and described field effect transistor Q1 drain electrode, and negative pole connects the positive pole of described light-emitting diode D2, D3.
Preferably, described modular converter also comprises:
The first filter capacitor C1, the common node of inductance L and described Light-Emitting Diode D2, D3 negative pole described in described the first filter capacitor C1 mono-termination, the negative pole of diode D1 and the positive pole of Light-Emitting Diode D2, D3 described in another termination.
Described acquisition module comprises the first current-limiting resistance R2 and the second filter capacitor C2, the common node of field effect transistor Q1 source electrode and described the first divider resistance R1 described in described the first current-limiting resistance R2 mono-termination, control module described in another termination, the common node of the first current-limiting resistance R2 and described control module described in described the second filter capacitor C2 mono-termination, other end ground connection.
Described control module comprises single-chip microcomputer U, the power supply input pin of described single-chip microcomputer U i.e. the first pin connects anode, grounding pin i.e. octal ground connection, sampling pin is the common node that the 6th pin meets described the first current-limiting resistance R2 and described the second filter capacitor C2, and PWM output pin is the grid that the 5th pin meets described field effect transistor Q1.
Described switch module comprises interrupteur SW and pull-up resistor R3, described interrupteur SW one end ground connection, the i.e. tripod of the switch pin of single-chip microcomputer U described in another termination, described pull-up resistor R3 mono-termination battery BT is anodal, the common node of interrupteur SW and described single-chip microcomputer U switch pin described in another termination.
Described field effect transistor Q1 is N-type field effect transistor.
Described battery BT is rechargeable battery.
The model of described single-chip microcomputer U is HT46R01C.It is the analog-to-digital single-chip microcomputer of 8 bit strip, by programming, realizes its function.Operation technique is ripe, and stable performance is cheap.
When field effect transistor Q1 conducting, electric current is from top to bottom to inductance L charging, and when field effect transistor Q1 turn-offs, the inductance L sense of current remains unchanged, and flows to from top to bottom diode D1, and power supply, to LED load and filter capacitor C1, makes LED loaded work piece.The electric current that flows through inductance L is controlled by single-chip microcomputer U, and single-chip microcomputer, by regulating PWM duty ratio, is controlled size of current, thereby made LED loaded work piece current stabilization, is not subject to battery BT voltage influence.
The operating current of LED load is controlled in control module and sampling module acting in conjunction, and electric current, after inductance L and field effect transistor Q1, flows through the first divider resistance R1, now, produces sampled voltage at R1 two ends.When the sampled voltage at R1 two ends is during higher than predetermined threshold value voltage, single-chip microcomputer regulation output duty ratio, reduces duty ratio output, and when the sampled voltage at R1 two ends is during lower than predetermined threshold value voltage, single-chip microcomputer adds big space rate output.Thereby reach the object of constant current output.Guarantee the stability of LED loaded work piece.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
By the description of above-described embodiment, the present invention has the following advantages:
The collection voltage changing according to Light-Emitting Diode operating voltage by acquisition module collection, and export control module to as the foundation of controlling, control module is when gathering voltage lower than predetermined voltage threshold, heighten the operating current of Light-Emitting Diode, when gathering voltage higher than predetermined voltage threshold, turn down the operating current of Light-Emitting Diode, thereby the operating current of guaranteeing light-emitting diode is stable so that Light-Emitting Diode steady operation, improved the electrical efficiency of drive circuit, guarantee the job stability of Light-Emitting Diode, extended the useful life of light fixture.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory is called for short ROM) or random store-memory body (Random Access Memory is called for short RAM) etc.
Above disclosed is only preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the claims in the present invention, still belongs to the scope that the present invention is contained.
Claims (10)
1. a LED bearing signal lamp drive circuit, is characterized in that, comprising:
Modular converter, is connected respectively with Light-Emitting Diode with battery, for regulating the operating voltage of light-emitting diode, keeps the stable operating voltage of described Light-Emitting Diode;
Acquisition module, is connected with described modular converter, for gathering the collection voltage changing according to described operating voltage;
Control module, is connected with described acquisition module, for receiving described collection voltage, according to the situation of described collection voltage and predetermined voltage threshold comparison, adjusts the operating current of described light-emitting diode so that described Light-Emitting Diode steady operation.
2. circuit as claimed in claim 1, it is characterized in that, described modular converter comprises inductance, diode, field effect transistor and the first divider resistance, one termination anode of described inductance and the negative pole of described Light-Emitting Diode, the drain electrode of field effect transistor described in another termination, the source electrode of described field effect transistor connects described first divider resistance one end, grid connects described control module, described the first divider resistance other end ground connection, the positive pole of described diode connects the common node of described inductance and the drain electrode of described field effect transistor, and negative pole connects the positive pole of described light-emitting diode.
3. circuit as claimed in claim 2, is characterized in that, described modular converter also comprises:
The first filter capacitor, the common node of inductance and described Light-Emitting Diode negative pole described in described the first filter capacitor one termination, the negative pole of diode and the positive pole of Light-Emitting Diode described in another termination.
4. circuit as claimed in claim 3, it is characterized in that, described acquisition module comprises the first current-limiting resistance and the second filter capacitor, the common node of field effect transistor source electrode and described the first divider resistance described in described the first current-limiting resistance one termination, control module described in another termination, the common node of the first current-limiting resistance and described control module described in described the second filter capacitor one termination, other end ground connection.
5. circuit as claimed in claim 4, it is characterized in that, described control module comprises single-chip microcomputer, the power supply input pin of described single-chip microcomputer connects anode, grounding pin ground connection, sampling pin connects the common node of described the first current-limiting resistance and described the second filter capacitor, and PWM output pin connects the grid of described field effect transistor.
6. circuit as claimed in claim 5, is characterized in that, also comprises:
Switch module, is connected with described control module, for controlling the operating state of described control module.
7. circuit as claimed in claim 6, it is characterized in that, described switch module comprises switch and pull-up resistor, described switch one end ground connection, the switch pin of single-chip microcomputer described in another termination, described pull-up resistor one termination anode, the common node of switch and described single-chip microcomputer switch pin described in another termination.
8. circuit as claimed in claim 7, is characterized in that, described field effect transistor is N-type field effect transistor.
9. circuit as claimed in claim 8, is characterized in that, described battery is rechargeable battery, and the model of described single-chip microcomputer is HT46R01C.
10. a LED bearing signal lamp, is characterized in that, described LED bearing signal lamp comprises the circuit as described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209564.1A CN104219815A (en) | 2013-05-30 | 2013-05-30 | A LED orientation signal light and drive circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209564.1A CN104219815A (en) | 2013-05-30 | 2013-05-30 | A LED orientation signal light and drive circuit thereof |
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| CN104219815A true CN104219815A (en) | 2014-12-17 |
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| CN201310209564.1A Pending CN104219815A (en) | 2013-05-30 | 2013-05-30 | A LED orientation signal light and drive circuit thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112294265A (en) * | 2020-11-03 | 2021-02-02 | 珠海中科先进技术研究院有限公司 | A kind of intravenous display device and method for assisting animal tail vein injection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200944691Y (en) * | 2006-09-05 | 2007-09-05 | 戴友谊 | Wide voltage LED drive circuit |
| CN201731275U (en) * | 2010-05-24 | 2011-02-02 | 深圳尚莱特照明技术有限公司 | Intelligent light-adjusting flashlight capable of adjusting light intensity |
| CN102487567A (en) * | 2010-12-01 | 2012-06-06 | 海洋王照明科技股份有限公司 | LED constant current drive circuit used for portable device |
| US20120235601A1 (en) * | 2010-09-14 | 2012-09-20 | Triune Ip Llc | Driver Method |
-
2013
- 2013-05-30 CN CN201310209564.1A patent/CN104219815A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200944691Y (en) * | 2006-09-05 | 2007-09-05 | 戴友谊 | Wide voltage LED drive circuit |
| CN201731275U (en) * | 2010-05-24 | 2011-02-02 | 深圳尚莱特照明技术有限公司 | Intelligent light-adjusting flashlight capable of adjusting light intensity |
| US20120235601A1 (en) * | 2010-09-14 | 2012-09-20 | Triune Ip Llc | Driver Method |
| CN102487567A (en) * | 2010-12-01 | 2012-06-06 | 海洋王照明科技股份有限公司 | LED constant current drive circuit used for portable device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112294265A (en) * | 2020-11-03 | 2021-02-02 | 珠海中科先进技术研究院有限公司 | A kind of intravenous display device and method for assisting animal tail vein injection |
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Application publication date: 20141217 |
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