CN104936344A - LED light source emergency lighting device - Google Patents
LED light source emergency lighting device Download PDFInfo
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- CN104936344A CN104936344A CN201510313159.3A CN201510313159A CN104936344A CN 104936344 A CN104936344 A CN 104936344A CN 201510313159 A CN201510313159 A CN 201510313159A CN 104936344 A CN104936344 A CN 104936344A
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Abstract
The invention discloses an LED light source emergency lighting device, comprising a power supply terminal and an LED driving power supply circuit. The power supply terminal has a commercial power supply terminal and a fire-fighting power supply terminal; the LED driving power supply circuit has an LED driving power supply chip; the LED light source emergency lighting device also comprises a first half-wave rectifying circuit, an optoelectronic coupler, a second field effect transistor and a driving power supply current sampling resistor circuit. The commercial power end is connected to a light emitting member of the optoelectronic coupler through the first half-wave rectifying circuit; the collector electrode of a light-sensitive member of the optoelectronic coupler is connected to an LED driving power supply chip; the driving power supply current sampling resistor circuit comprises two branch circuits which are connected in parallel; one of the branch circuits is provided with a first field effect transistor for controlling the on-off of the branch; the collector electrode of the optoelectronic coupler is connected to the grid electrode of the second field effect transistor; the drain electrode of the second field effect transistor is connected to the grid electrode of the first field effect transistor; and the drain electrode of the second field effect transistor is connected to the LED driving power supply chip.
Description
Technical field
The present invention relates to LED lamp field, be specifically related to a kind of LED light source and meet an urgent need lamp-enlightened device.
Background technology
In face of environmental protection pressure, energy-intensive reality, artificial light also carries out transition and upgrade by conventional fluorescent to LED, and in emergency lighting field, light source also have selected LED light source usually.At this moment, when LED is in emergent, refuting the emergency power supply connecing LED light source just has two kinds of modes, and one is as most conventional fluorescent is met an urgent need bright light mode, lights LED light source by the conversion Direct driver of DC-AC-DC; One is refute the driving power connecing and coordinate with LED light source, namely provides the input voltage of driving power to light LED light source by AC-DC-AC conversion.These two kinds of modes have its drawback.The drawback of first kind of way is that an emergency power supply can only light a LED, due to emergency power supply Direct driver LED, along with the passage battery capacity of discharge time progressively declines, the luminous flux of lamp is caused to reduce gradually, likely can not meet the requirement of GB to luminous flux, and light fixture bright dipping is also uneven, affects comfortableness.The drawback of the second way is, during emergency power supply driving LED power supply, due to the output characteristic of LED power, under LED is in full power state, although luminous flux adds, battery drain is very fast, do not reach the discharge time of Standard, to time expand, certainly will increase battery capacity, so product cost is invisible just adds.
Summary of the invention
For avoiding above-mentioned two kinds of drawbacks, the invention provides a kind of LED light source and to meet an urgent need lamp-enlightened device, time emergent, LED drive power is operated in sectional dimming pattern, make output meet GB to luminous flux requirement time emergent, simultaneously within the crash time, also meet the stability of luminous flux.
For solving above-mentioned existing technical problem, the present invention adopts following scheme: a kind of LED light source is met an urgent need lamp-enlightened device, comprise feeder ear and LED drive power circuit, described feeder ear has mains-supplied end and fire-fighting electricity feeder ear, described mains-supplied end is connected with LED drive power circuit by diverter switch with fire-fighting electricity feeder ear, described LED drive power circuit switches supply civil power or fire-fighting electricity by diverter switch, described LED drive power circuit has LED drive power chip, described LED light source lamp-enlightened device of meeting an urgent need also comprises the first half-wave rectifying circuit, photoelectrical coupler, second field effect transistor and driving power current sampling resistor circuit, described mains-supplied end is connected with the light-emitting component of photoelectrical coupler by the first half-wave rectifying circuit, the collector electrode of the light-sensitive element of described photoelectrical coupler is connected with LED drive power chip and provides voltage by LED drive power chip, described driving power current sampling resistor circuit on one side is connected with LED drive power chip, the other end is connected with the emitter of the light-sensitive element of photoelectrical coupler, described driving power current sampling resistor circuit comprises two branch roads in parallel, wherein branch road is provided with the first field effect transistor for controlling this branch road break-make, the collector electrode of the light-sensitive element of described photoelectrical coupler is connected with the grid of the second field effect transistor, the drain electrode of described second field effect transistor is connected with the grid of the first field effect transistor, and the drain electrode of described second field effect transistor is connected with LED drive power chip.
As preferably, in the branch road that two of described driving power current sampling resistor circuit are in parallel, the branch road being provided with the first field effect transistor comprises the series circuit be made up of the first field effect transistor and the 6th resistance, and another article of branch road comprises the 7th resistance.
As preferably, the drain electrode of described second field effect transistor is connected with LED drive power chip by the 5th resistance.
As preferably, the collector electrode of the light-sensitive element of described photoelectrical coupler is connected with LED drive power chip by the 3rd resistance.
As preferably, described feeder ear comprises civil power live wire feeder ear, fire-fighting electricity live wire feeder ear and zero line side, civil power live wire feeder ear and zero line side form mains-supplied end, fire-fighting electricity live wire feeder ear and zero line side form fire-fighting electricity feeder ear, described civil power live wire feeder ear and fire-fighting electricity live wire feeder ear are electrically connected with one end of LED drive power circuit by diverter switch, and described zero line side is electrically connected with the other end of LED drive power circuit.
As preferably, described first half-wave rectifying circuit comprises the first diode, the first resistance and the second resistance, described first diode, the first resistance, the second resistance and mains-supplied end form series loop, the light-emitting component of described photoelectrical coupler and the second resistor coupled in parallel, the light-emitting component of described photoelectrical coupler and the first diode, the first resistant series.
As preferably, described LED drive power circuit also comprises bridge rectifier, filter circuit, the 3rd field effect transistor, transformer, the second half-wave rectifying circuit and light-emitting diode, described feeder ear is connected with bridge rectifier, described bridge rectifier is connected by one end of the primary coil of filter circuit and LED drive power chip and transformer, described LED drive power chip is connected with the other end of the primary coil of transformer by the 3rd field effect transistor, and the secondary coil of described transformer is connected with light-emitting diode by the second half-wave rectifying circuit.
As preferably, described filter circuit comprises the first electric capacity, the second electric capacity and the 4th resistance, described first electric capacity two ends are all connected with bridge rectifier, described second electric capacity one end is connected with LED drive power chip, the other end is connected with bridge rectifier, and described 4th resistance one end is connected with LED drive power chip, the other end is connected with bridge rectifier with primary coil one end of transformer.
As preferably, described second half-wave rectifying circuit comprises the second diode, the 8th resistance and the 3rd electric capacity, with the second Diode series after described 8th resistance, the 3rd electric capacity and light-emitting diode parallel connection.
Beneficial effect:
After the present invention adopts technique scheme, when light source is switched to emergent bright light from normal bright light, when being namely switched to fire-fighting electricity from civil power, circuit does corresponding switching to LED drive power chip output constant current size simultaneously, that is, time emergent, LED drive power is operated in sectional dimming pattern, make output meet GB to luminous flux requirement time emergent, simultaneously within the crash time, also meet the stability of luminous flux.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Be illustrated in figure 1 a kind of LED light source of the present invention to meet an urgent need the preferred embodiment of lamp-enlightened device, this LED light source meets an urgent need lamp-enlightened device primarily of comprising feeder ear 1, LED drive power circuit 2, first half-wave rectifying circuit 3, photoelectrical coupler U1, the second field effect transistor Q2 and driving power current sampling resistor circuit 4 three part composition.LED drive power circuit 2 has LED drive power chip IC, LED drive power circuit 2 is with LED drive power chip IC for main control chip controls whole circuit working, and the collector electrode of the light-sensitive element of photoelectrical coupler U1 to be connected with LED drive power chip IC by the 3rd resistance R3 and to provide voltage by LED drive power chip IC.
Feeder ear 1 is by mains-supplied end and fire-fighting electricity feeder ear, and mains-supplied end is connected with LED drive power circuit 2 by diverter switch SW with fire-fighting electricity feeder ear, and LED drive power circuit 2 switches supply civil power or fire-fighting electricity by diverter switch SW.Concrete, feeder ear 1 is made up of civil power live wire feeder ear L1, fire-fighting electricity live wire feeder ear L2 and zero line side N, and civil power live wire feeder ear L1 and zero line side N forms mains-supplied end; Fire-fighting electricity live wire feeder ear L2 and zero line side N forms fire-fighting electricity feeder ear, civil power live wire feeder ear L1 and fire-fighting electricity live wire feeder ear L2 is electrically connected with one end of LED drive power circuit 2 by diverter switch SW, zero line side N is electrically connected with the other end of LED drive power circuit 2, diverter switch SW adopts single-pole double-throw switch (SPDT), when diverter switch SW is communicated with civil power live wire feeder ear L1 and LED drive power circuit 2, supply civil power; When diverter switch SW is communicated with fire-fighting electricity live wire feeder ear L2 and LED drive power circuit 2, supply fire-fighting electricity.
First half-wave rectifying circuit 3 is by the first diode D1, first resistance R1 and the second resistance R2 forms, civil power live wire feeder ear L1 is connected with the positive pole of the first diode D1 by the first diode D1, the negative pole of the first diode D1 is connected with zero line side N by the second resistance R2, the negative pole of the first diode D1 is connected with the positive pole of light-emitting component on photoelectrical coupler U1, on electric coupling U1, the negative pole of light-emitting component is connected with zero line side N, such first resistance R1, first diode D1, just a series loop is formed between second resistance R2 and mains-supplied end, first resistance R1, first diode D1, also a series loop is formed between the light-emitting component of photoelectrical coupler U1 and mains-supplied end, a parallel circuits is formed between the light-emitting component of photoelectrical coupler U1 and the second resistance R2.
Driving power current sampling resistor circuit 4 is primarily of two branch road compositions of parallel connection, wherein one article route first field effect transistor Q1 and the 6th resistance R6 forms series circuit, one end of 6th resistance R6 is connected with the drain electrode of the first field effect transistor Q1, the other end is connected with the CS pin in LED drive power chip IC, the source ground of the first field effect transistor Q1; Another article route the 7th resistance R7 forms, one end that one end and the 6th resistance R6 of the 7th resistance R7 are connected with the CS pin in LED drive power chip IC connects, the other end is connected with the source electrode of the first field effect transistor Q1, and the source electrode of the first field effect transistor Q1 is connected with the emitter of the light-sensitive element of photoelectrical coupler U1.
The grid of the second field effect transistor Q2 is connected with the collector electrode of the light-sensitive element of photoelectrical coupler U1, the drain electrode of the second field effect transistor Q2 is connected with the grid of the first field effect transistor Q1, and the drain electrode of the second field effect transistor Q2 is connected with the VT pin of LED drive power chip IC by the 5th resistance R5.
Except LED drive power chip IC, LED drive power circuit 2 also comprises bridge rectifier 5, filter circuit 6, the 3rd field effect transistor Q3, transformer T, the second half-wave rectifying circuit 7 and light-emitting diode D3.In this embodiment, bridge rectifier 5 is the bridge rectifier that conventional employing is made up of four diodes, for prior art, do not repeat at this, this bridge rectifier 5 has two AC pins, a V+ pin and a V-pin, civil power live wire feeder ear L1 and fire-fighting electricity live wire feeder ear L2 is connected to an AC pin of bridge rectifier 5 by diverter switch SW, zero line side N is connected to another AC pin of bridge rectifier 5, the V-pin ground connection of bridge rectifier 5, V+ pin is connected with one end of the primary coil of LED drive power chip IC and transformer T respectively by filter circuit 6.
Concrete, filter circuit 6 is made up of the first electric capacity C1, the second electric capacity C2 and the 4th resistance R4, first electric capacity C1 one end is connected with the V+ pin of bridge rectifier 5, other end ground connection or be connected with the V-pin of bridge rectifier 5, second electric capacity C2 one end is connected with the VT pin of LED drive power chip IC, other end ground connection or be connected with the V-pin of bridge rectifier 5, and the 4th resistance R4 one end is connected with the VT pin of LED drive power chip IC, the other end is respectively with the V+ pin of bridge rectifier 5 be connected with primary coil one end of transformer T.
LED drive power chip IC is connected with the other end of the primary coil of transformer T by the 3rd field effect transistor Q3, concrete, the CS pin of LED drive power chip IC is connected with the source electrode of the 3rd field effect transistor Q3, the GATE pin of LED drive power chip IC is connected with the grid of the 3rd field effect transistor Q3, and the other end of the primary coil of transformer T is connected with the drain electrode of the 3rd field effect transistor Q3.
The secondary coil of transformer T is connected with light-emitting diode D3 by the second half-wave rectifying circuit 7.Concrete, the second half-wave rectifying circuit 7 is made up of the second diode D2, the 8th resistance R8 and the 3rd electric capacity C3, the positive pole of the second diode D2 is connected with one end of the secondary coil of transformer T, negative pole respectively with one end of the 8th resistance R8, one end of 3rd electric capacity C3 connects, the other end of the 8th resistance R8, the other end of the 3rd electric capacity C3 is connected with the secondary coil other end of transformer T respectively, the positive pole of light-emitting diode D3 is connected with the negative pole of the second diode D2, the other end of negative pole and the 8th resistance R8, the other end of the 3rd electric capacity C3 connects, now, 8th resistance R8, 3rd electric capacity C3 and light-emitting diode D3 is in parallel, and the 8th resistance R8, 3rd electric capacity C3 and light-emitting diode D3 all connects with the second diode D2.
This LED light source lamp-enlightened device specific works principle of meeting an urgent need is as follows: when civil power input normal power-up, light-emitting component conducting in photoelectrical coupler U1, the collector electrode also corresponding conducting of photoelectrical coupler U1 light-sensitive element, the second field effect transistor Q2 grid that now collector electrode controls is low level, drain electrode becomes high level output, drive the first field effect transistor Q1 conducting, first field effect transistor Q1 is serially connected in after on current sampling resistor-six resistance R6 together in parallel with sampling resistor-seven resistance R7, now, due to the conducting of the first field effect transistor Q1, 6th resistance R6 and the 7th resistance R7 is in parallel, this parallel connection is worth the value just required for rated current, in other words, when normal power-up, LED light source full power output light flux.Otherwise, when civil power disconnects, during the input of fire-fighting electricity, at this moment, the light-emitting component open circuit of the photoelectrical coupler of string in civil power branch road, corresponding light photosensitive elements is also opened a way, second field effect transistor Q2 grid obtains high level and conducting, first field effect transistor Q1 disconnects, now, 6th resistance R6 opens a way, only there is the 7th resistance R7 as sampling resistor, whole sampling resistor resistance increases, driver output electric current is caused to reduce, LED light source luminous flux reduces, output current is transferred to great value, can obtain by regulating the resistance of the first resistance R1 and the second resistance R2, the requirement of GB to emergent time flux can well be met like this.When therefore meeting an urgent need, the light output of whole light fixture is uniform, does not affect the light comfortableness requirement of light fixture.
The present invention solves the stability of LED lamp in the emergent output time very well, and effectively reduces battery capacity while meeting emergent electric discharge duration, has saved the energy, has reduced cost, obtained good economic benefit.
Claims (9)
1. a LED light source is met an urgent need lamp-enlightened device, comprise feeder ear (1) and LED drive power circuit (2), described feeder ear (1) has mains-supplied end and fire-fighting electricity feeder ear, described mains-supplied end is connected with LED drive power circuit (2) by diverter switch (SW) with fire-fighting electricity feeder ear, described LED drive power circuit (2) switches supply civil power or fire-fighting electricity by diverter switch (SW), described LED drive power circuit (2) has LED drive power chip (IC), it is characterized in that: described LED light source lamp-enlightened device of meeting an urgent need also comprises the first half-wave rectifying circuit (3), photoelectrical coupler (U1), second field effect transistor (Q2) and driving power current sampling resistor circuit (4), described mains-supplied end is connected with the light-emitting component of photoelectrical coupler (U1) by the first half-wave rectifying circuit (3), the collector electrode of the light-sensitive element of described photoelectrical coupler (U1) is connected with LED drive power chip (IC) and provides voltage by LED drive power chip (IC), described driving power current sampling resistor circuit (4) one end is connected with LED drive power chip (IC), the other end is connected with the emitter of the light-sensitive element of photoelectrical coupler (U1), described driving power current sampling resistor circuit (4) comprises two branch roads in parallel, wherein branch road is provided with the first field effect transistor (Q1) for controlling this branch road break-make, the collector electrode of the light-sensitive element of described photoelectrical coupler (U1) is connected with the grid of the second field effect transistor (Q2), the drain electrode of described second field effect transistor (Q2) is connected with the grid of the first field effect transistor (Q1), and the drain electrode of described second field effect transistor (Q2) is connected with LED drive power chip (IC).
2. a kind of LED light source according to claim 1 is met an urgent need lamp-enlightened device, it is characterized in that: in the branch road that two of described driving power current sampling resistor circuit (4) are in parallel, the branch road being provided with the first field effect transistor (Q1) comprises the series circuit be made up of the first field effect transistor (Q1) and the 6th resistance (R6), and another article of branch road comprises the 7th resistance (R7).
3. a kind of LED light source according to claim 1 is met an urgent need lamp-enlightened device, it is characterized in that: the drain electrode of described second field effect transistor (Q2) is connected with LED drive power chip (IC) by the 5th resistance (R5).
4. a kind of LED light source according to claim 1 is met an urgent need lamp-enlightened device, it is characterized in that: the collector electrode of the light-sensitive element of described photoelectrical coupler (U1) is connected with LED drive power chip (IC) by the 3rd resistance (R3).
5. a kind of LED light source according to claim 1 is met an urgent need lamp-enlightened device, it is characterized in that: described feeder ear (1) comprises civil power live wire feeder ear (L1), fire-fighting electricity live wire feeder ear (L2) and zero line side (N), civil power live wire feeder ear (L1) and zero line side (N) form mains-supplied end, fire-fighting electricity live wire feeder ear (L2) and zero line side (N) form fire-fighting electricity feeder ear, described civil power live wire feeder ear (L1) and fire-fighting electricity live wire feeder ear (L2) are electrically connected by diverter switch (SW) one end with LED drive power circuit (2), described zero line side (N) is electrically connected with the other end of LED drive power circuit (2).
6. a kind of LED light source according to claim 1 is met an urgent need lamp-enlightened device, it is characterized in that: described first half-wave rectifying circuit (3) comprises the first diode (D1), first resistance (R1) and the second resistance (R2), described first diode (D1), first resistance (R1), second resistance (R2) and mains-supplied end form series loop, the light-emitting component of described photoelectrical coupler (U1) is in parallel with the second resistance (R2), the light-emitting component of described photoelectrical coupler (U1) and the first diode (D1), first resistance (R1) is connected.
7. a kind of LED light source according to claim 1 is met an urgent need lamp-enlightened device, it is characterized in that: described LED drive power circuit (2) also comprises bridge rectifier (5), filter circuit (6), 3rd field effect transistor (Q3), transformer (T), second half-wave rectifying circuit (7) and light-emitting diode (D3), described feeder ear (1) is connected with bridge rectifier (5), described bridge rectifier (5) is connected by one end of the primary coil of filter circuit (6) and LED drive power chip (IC) and transformer (T), described LED drive power chip (IC) is connected with the other end of the primary coil of transformer (T) by the 3rd field effect transistor (Q3), the secondary coil of described transformer (T) is connected with light-emitting diode (D3) by the second half-wave rectifying circuit (7).
8. a kind of LED light source according to claim 7 is met an urgent need lamp-enlightened device, it is characterized in that: described filter circuit (6) comprises the first electric capacity (C1), second electric capacity (C2) and the 4th resistance (R4), described first electric capacity (C1) two ends are all connected with bridge rectifier (5), described second electric capacity (C2) one end is connected with LED drive power chip (IC), the other end is connected with bridge rectifier (5), described 4th resistance (R4) one end is connected with LED drive power chip (IC), the other end is connected with bridge rectifier (5) with primary coil one end of transformer (T).
9. a kind of LED light source according to claim 7 is met an urgent need lamp-enlightened device, it is characterized in that: described second half-wave rectifying circuit (7) comprises the second diode (D2), the 8th resistance (R8) and the 3rd electric capacity (C3), connect with the second diode (D2) after described 8th resistance (R8), the 3rd electric capacity (C3) and light-emitting diode (D3) are in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510313159.3A CN104936344B (en) | 2015-06-09 | 2015-06-09 | A kind of LED light source is met an urgent need lamp-enlightened device |
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| CN201510313159.3A CN104936344B (en) | 2015-06-09 | 2015-06-09 | A kind of LED light source is met an urgent need lamp-enlightened device |
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| CN104936344A true CN104936344A (en) | 2015-09-23 |
| CN104936344B CN104936344B (en) | 2017-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017197813A1 (en) * | 2016-05-17 | 2017-11-23 | 黎辉 | Half-wave shunting led lamp driving device |
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| JP2007265690A (en) * | 2006-03-27 | 2007-10-11 | Toshiba Lighting & Technology Corp | Emergency lighting system |
| CN101463962A (en) * | 2009-01-03 | 2009-06-24 | 李赞荣 | LED emergency lamp |
| CN202634838U (en) * | 2012-06-21 | 2012-12-26 | 西蒙电气（中国）有限公司 | Emergency lighting control circuit system |
| CN104682541A (en) * | 2013-11-27 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Emergency lamp control circuit and emergency lamp control device |
| CN204795721U (en) * | 2015-06-09 | 2015-11-18 | 杭州鸿雁电器有限公司 | Emergent bright lamp device of LED light source |
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2015
- 2015-06-09 CN CN201510313159.3A patent/CN104936344B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007265690A (en) * | 2006-03-27 | 2007-10-11 | Toshiba Lighting & Technology Corp | Emergency lighting system |
| CN101463962A (en) * | 2009-01-03 | 2009-06-24 | 李赞荣 | LED emergency lamp |
| CN202634838U (en) * | 2012-06-21 | 2012-12-26 | 西蒙电气（中国）有限公司 | Emergency lighting control circuit system |
| CN104682541A (en) * | 2013-11-27 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Emergency lamp control circuit and emergency lamp control device |
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| WO2017197813A1 (en) * | 2016-05-17 | 2017-11-23 | 黎辉 | Half-wave shunting led lamp driving device |
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Denomination of invention: LED light source emergency lighting device Effective date of registration: 20181227 Granted publication date: 20170714 Pledgee: Bank of China Limited Linan Branch Pledgor: HANGZHOU HONYAR ELECTRICAL Co.,Ltd. Registration number: 2018330000531 |
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Denomination of invention: An emergency lighting device for LED light source Effective date of registration: 20200911 Granted publication date: 20170714 Pledgee: CITIC Bank Limited by Share Ltd. Hangzhou branch Pledgor: HANGZHOU HONYAR ELECTRICAL Co.,Ltd. Registration number: Y2020330000702 |
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