CN206413228U - It is a kind of effectively to weaken the LED electrical equipments of stroboscopic phenomenon - Google Patents

Abstract

The utility model offer is a kind of can effectively to weaken the LED electrical equipments of stroboscopic phenomenon, including the current rectifying and wave filtering circuit and LED load circuit being electrically connected to each other, wherein, met between the input voltage Vi and output voltage V1 of the current rectifying and wave filtering circuit：1.15Vi≤V1≤1.41Vi, LED load circuit includes the civil power nominal load group and dividing load group of series connection, and the voltage difference at civil power nominal load group two ends is V2=Vi, and civil power nominal load group includes some LED individuals being electrically connected to each other.By the output voltage V1 for improving current rectifying and wave filtering circuit, the LED rated voltages of its minimum amount of voltage that and civil power nominal load group are made to match, add dividing load group to ensure the voltage V2=Vi at civil power nominal load group two ends simultaneously, it is simple in construction, each LED physical efficiency in LED load circuit is set to reach normal bright state, the stroboscopic phenomenon of LED electrical equipments is weakened, light efficiency is improved.

Description

It is a kind of effectively to weaken the LED electrical equipments of stroboscopic phenomenon

Technical field

The utility model is related to lighting field, more particularly to a kind of can effectively weaken the LED electrical equipments of stroboscopic phenomenon.

Background technology

Because light efficiency is high, little power consumption, the application that LED lamp is illuminated with outdoor lighting indoors is more and more wider.Due to LED The characteristic of light-emitting component in tool --- LED lamp bead, rectification circuit and LED load circuit are included LED lamp more, and rectification circuit will The unidirectional pulsating dc voltage that the AC220V/50Hz rectified bridge rectification of civil power becomes DC200V/100Hz gives LED load circuit Power supply, Fig. 1 shows the voltage oscillogram after rectifier circuit rectifies.LED load circuit includes LED of several electrical connections Body, when the DC voltage that rectification circuit is exported is more than LED rated voltage Vf values, lamp bead is lighted, and on the contrary then lamp bead is extinguished；I.e. Only Fig. 1 crest near tops it is a bit of it is interval in just have in LED lamp bead electric current by and light, and other time section lamp Pearl is non-luminous.Thus, it can be known that existing LED lamp is actually with the flickering change of 100Hz frequencies, simply by There is visual persistence effect in human eye, human eye can not be differentiated when the frequency that this light and shade changes is more than 24Hz, and then we recognize For it is seen that one at every moment put light yellow lamp.But impact of this pulse DC electricity to LED is big, LED is not for a long time Its working life can be influenceed by being worked under " on-off " state stopped, and the light of this flicker also has an impact to human eye.Therefore without frequency Flashing light tool increasingly attracts attention.The magnitude of voltage for requiring supply LED two ends without stroboflash lamp set is not less than rated voltage Vf values, thus Need further to be filtered the output voltage of rectification circuit, it is ensured that the input high pressure of LED load circuit is smoother.

Following four method can export smoother DC voltage with except stroboscopic.The first is using linear DC voltage stabilizing electricity Source obtains smooth low-voltage DC supply to eliminate stroboscopic, i.e., by civil power by transformer pressure-reducing, rectification, filtering, voltage stabilizing and obtain The smooth low-voltage dc power supply of LED operation must be applied to.But for linear power supply, its transformer when being inputted with civil power With the head of electric capacity all than larger, and the big efficiency of linear power supply power consumption is low.Second is to use Switching Power Supply, its workflow It is：Switching Power Supply is to vibrate the high voltage direct current after civil power (50Hz) rectifying and wave-filtering through switching tube to be reverse into high frequency (70KHz) High Level AC Voltage, high frequency low voltage alternating current is depressured into through switch transformer, then by the smoother low-pressure direct of rectifying and wave-filtering acquisition The electric supply load of stream.Switching Power Supply has the advantages that small volume, small power consumption, in the market using switch electricity more than lower voltage LED lamp band Source powers.But the transformer caloric value of Switching Power Supply is big, while with the increase of LED load circuit, LED individual increase meeting There is the phenomenon of the brightness irregularities of each LED lamp bead.The third is to use constant-current supply, in the market most LEDs Tool is all that but the price of constant-current source is higher by driving power supply to LED lamp bead provides constant current come work, and constant-current source makes With the difficulty that can increase LED lamp installation and safeguard.4th kind is (for example to use electric capacity using the output voltage of increase rectification circuit Filtering), make each LED in each LED rated voltages in the suitable LED load circuit of its minimum output voltage, LED load circuit Body is in long bright state；But increase output voltage also can improve maximum output piezoelectricity value, if being directly used in existing LED load Circuit, certainly will cause the electric current for flowing through LED lamp bead excessive and make the too fast lost of life of its light decay, even directly burn out, therefore mesh Preceding in the market is temporarily unmanned to use this power supply plan.

Utility model content

The utility model offer is a kind of can effectively to weaken the LED electrical equipments of stroboscopic phenomenon, to solve in the prior art Current rectifying and wave filtering circuit and the unmatched problem of LED load circuit.

What the technical solution of the utility model was realized in：

The utility model can effectively weaken the LED electrical equipments of stroboscopic phenomenon, including current rectifying and wave filtering circuit there is provided a kind of With LED load circuit, the output end of current rectifying and wave filtering circuit and the input connection of LED load circuit, it is characterised in that：It is described whole Flow satisfaction between the input voltage Vi and output voltage V1 of filter circuit：1.15Vi≤V1≤1.41Vi, the LED load circuit Civil power nominal load group and dividing load group including series connection, the voltage difference at civil power nominal load group two ends is V2=Vi, described Civil power nominal load group includes the LED individuals that several are electrically connected to each other.

Civil power nominal load group described above includes several parallel with one another or series connection LED units, each LED unit bag Include the individual and some current-limiting resistances of some LED being electrically connected to each other.

Above-mentioned current rectifying and wave filtering circuit includes rectifier bridge, filter capacitor and bleeder resistance, and input and the city of rectifier bridge are electrically connected Connect, be connected to after the filter capacitor and bleeder resistance are in parallel in the output end of rectifier bridge, the two ends of the filter capacitor are formed The output end of current rectifying and wave filtering circuit.

The capacitance C of filter capacitor described above is：C >=0.289/ { f × (U/I) × ACv }, wherein, f is the arteries and veins of civil power Frequency is rushed, U is the maximum voltage of rectification bridge output end, and I is current rectifying and wave filtering circuit maximum output current, 0.1≤ACv≤0.2.

Filter capacitor described above is electrochemical capacitor, and the pressure voltage of filter capacitor is 400~450V.

LED load circuit described above includes LED sub-circuits parallel with one another, and each LED sub-circuits include the institute of series connection State civil power nominal load group and the dividing load group.

Dividing load group described above includes divider resistance.

Dividing load group described above includes LED bleeder circuits, and the LED bleeder circuits include the LED of some electrical connections Individual and the second current-limiting resistance.

It is described in the utility model it is a kind of can effectively weaken the LED electrical equipments of stroboscopic phenomenon, have compared with prior art Advantages below：

1) the utility model makes its minimum magnitude of voltage and civil power volume by improving the output voltage of current rectifying and wave filtering circuit The individual rated voltages of the LED of fixed load group match, and at the same time add a dividing load group to ensure that civil power is specified negative The voltage difference at load group two ends is V2=Vi, simple in construction, the voltage at the individual two ends of the LED in LED load circuit is more than its volume Determine voltage, each LED physical efficiency reaches Chang Liang state, weakens the stroboscopic phenomenon of LED electrical equipments, improve light efficiency, growth The working life of LED individuals.

2) the general illumination circuit inertial thinking that people's custom is loaded using reduction input voltage connection in design, this reality With the new design misconduct for eliminating everybody, by the load of appropriate increase LED load circuit simultaneously, make LED load circuit The voltage that brings out of operating voltage and current rectifying and wave filtering circuit matches, and makes the individual normal works of each LED in civil power nominal load group.

3) the civil power nominal load group includes the LED individuals and current-limiting resistance of mutual some electrical connections, current-limiting resistance Current value to adjust civil power nominal load group, it is to avoid the electric current for flowing through each LED individuals is excessive.

4) pulsating direct current exported using the charge-discharge characteristic of filter capacitor to rectification circuit is filtered relatively is put down with obtaining Sliding pulsating direct current, it is simple in construction, it is with low cost, install and easy to maintenance.

5) power-off post filtering electric capacity electric discharge, when the filter circuit output voltage is less than the work of the LED load circuit LED load circuit ends during voltage, but a large amount of electric energy are also contained in filter capacitor does not release, now the filter capacitor and described A minor loop is formed between bleeder resistance, the electricity of filter capacitor released by bleeder resistance, it is to avoid someone horse after a loss of power Light fixture is dismantled up, is touched lamp joint and is electrically shocked.

6) the dividing load group includes LED bleeder circuits, and LED bleeder circuits include the LED individuals of some electrical connections, should Design makes the light efficiency of LED electrical equipments stronger equivalent to one group of LED individual has been further added by.

Brief description of the drawings

Fig. 1 is the voltage oscillogram after rectifier circuit rectifies circuit rectifies in the prior art；

Fig. 2 is that the circuit for the LED electrical equipments that can effectively weaken stroboscopic phenomenon that the utility model embodiment one is provided is former Reason figure；

Fig. 3 is rectification filter in the LED electrical equipments that can effectively weaken stroboscopic phenomenon that the utility model embodiment one is provided The output voltage waveform of wave circuit；

Fig. 4 is that the LED in the LED electrical equipments that can effectively weaken stroboscopic phenomenon that the utility model embodiment two is provided is born Carry circuit theory diagrams；

Fig. 5 is that the LED in the LED electrical equipments that can effectively weaken stroboscopic phenomenon that the utility model embodiment three is provided is born Carry circuit theory diagrams；

It is preferred in the LED electrical equipments that can effectively weaken stroboscopic phenomenon that Fig. 6 provides for the utility model embodiment three Item LED load circuit theory diagrams.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to The scope of the utility model protection.

Embodiment one：

The circuit theory diagrams for the LED electrical equipments that can effectively weaken stroboscopic phenomenon that Fig. 2 provides for the present embodiment；Fig. 3 is The output voltage waveform of current rectifying and wave filtering circuit in the LED electrical equipments that can effectively weaken stroboscopic phenomenon of the present embodiment offer.

As shown in Figure 2 and Figure 3, the present embodiment provide it is a kind of can effectively weaken the LED electrical equipments of stroboscopic phenomenon, including Current rectifying and wave filtering circuit 1 and LED load circuit, output end O3, O4 of current rectifying and wave filtering circuit 1 and the input I1 of LED load circuit, I2 connections, meet between the input voltage Vi and output voltage V1 of the current rectifying and wave filtering circuit 1：1.15Vi≤V1≤1.41Vi, The LED load circuit includes the civil power nominal load group 31 and dividing load group 32 of series connection, the two ends of civil power nominal load group 31 Voltage V2=Vi, the civil power nominal load group 31 include some LED individuals LED1 ... LEDn being electrically connected to each other.

The utility model makes its minimum magnitude of voltage and civil power by improving the output voltage V1 of current rectifying and wave filtering circuit 1 The individual rated voltages of the LED of nominal load group match, and at the same time add a dividing load group 32 to ensure civil power volume The voltage difference at the two ends of fixed load group 31 is V2=Vi, simple in construction, makes the voltage at the individual two ends of each LED in LED load circuit More than its rated voltage, each LED physical efficiency reaches Chang Liang state, weakens the stroboscopic phenomenon of LED electrical equipments, improves light Imitate, increase the working life of LED individuals.

Civil power nominal load group 31 described above includes several LED units 4 parallel with one another, and each LED unit 4 includes Some LED individual LED1 ... LEDn1 and some current-limiting resistance R1 ... Rn being electrically connected to each other.

Structure in LED unit 4 described above can be serially connected for the individual and described current-limiting resistances of multiple LED, Can for multiple LED individuals it is in parallel after a variety of connected modes such as connected with the current-limiting resistance, in the utility model not one by one Thin row.

Dividing load group 32 described above includes divider resistance Rf.Divider resistance Rf can be single resistance, or multiple Resistance electrical connection composition.

Current rectifying and wave filtering circuit 1 described above includes rectifier bridge DB, filter capacitor C1 and bleeder resistance Rx, and rectifier bridge DB's is defeated Rectifier bridge DB output end is connected to after entering to hold I1, I2 and civil power Vi connections, the filter capacitor C1 and bleeder resistance Rx in parallel On, the two ends of the filter capacitor C1 form output end O1, O2 of current rectifying and wave filtering circuit 1.

The pulsating direct current exported using filter capacitor C1 charge-discharge characteristic to rectifier bridge is filtered smoother to obtain Pulsating direct current, it is simple in construction, it is with low cost, install and it is easy to maintenance.Post filtering electric capacity C1 electric discharges are powered off, when rectifying and wave-filtering electricity LED load circuit cut-off when the output voltage V1 on road 1 is less than the operating voltage of the LED load circuit, but in filter capacitor C1 Also contain a large amount of electric energy not release, a minor loop, filter are now formed between the filter capacitor C1 and the bleeder resistance Rx Ripple electric capacity C1 electricity is released by bleeder resistance Rx, it is to avoid someone removes dismounting light fixture, touching lamp joint at once after a loss of power And be electrically shocked.

Filter capacitor C1 described above capacitance C is：C >=0.289/ { f × (U/I) × ACv }, wherein, f is civil power Vi Pulse frequency, U be rectification bridge output end maximum voltage, I be the maximum output current of current rectifying and wave filtering circuit 1,0.1≤ACv≤ 0.2。

Filter capacitor C1 described above is electrochemical capacitor, and the pressure voltage of filter capacitor is 400~450V.

Civil power Vi described above is 220V, 110V or other.

Embodiment two：

LED load circuit theory in the LED electrical equipments that can effectively weaken stroboscopic phenomenon that Fig. 4 provides for the present embodiment Figure.

As shown in figure 4, a kind of of the present embodiment offer can effectively weaken the LED electrical equipments of stroboscopic phenomenon, with embodiment The LED electrical equipment structures that can effectively weaken stroboscopic phenomenon described in one are similar, and difference is：

The civil power nominal load group 31 includes the LED unit 4 that several are serially connected, and each LED unit 4 includes some LED the individual LED1 ... LEDn1 and some current-limiting resistance R1 ... Rn being electrically connected to each other.

Embodiment three：

LED load circuit theory in the LED electrical equipments that can effectively weaken stroboscopic phenomenon that Fig. 5 provides for the present embodiment Figure；Preference LED load circuit in the LED electrical equipments that can effectively weaken stroboscopic phenomenon that Fig. 6 provides for the present embodiment is former Reason figure.

As shown in figure 5, a kind of of the present embodiment offer can effectively weaken the LED electrical equipments of stroboscopic phenomenon, with embodiment The LED electrical equipment structures that can effectively weaken stroboscopic phenomenon described in two are similar, and difference is：

Dividing load group 32 described above includes LED bleeder circuits, and the LED bleeder circuits include some electrical connections LED individual LEDa ... LEDan and the second current-limiting resistance R a.

LED bleeder circuits in the present embodiment on the basis of civil power nominal load group 31 equivalent to adding one group of LED Individual LEDa ... LEDan, makes the brightness of whole LED electrical equipments higher.

As shown in fig. 6, as preference, the LED load circuit includes LED sub-circuits 5 parallel with one another, each LED Sub-circuit 5 includes the civil power nominal load group 31 and the dividing load group 32 of series connection.

Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that： It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc. With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment technology of the utility model The spirit and scope of scheme.

Claims (8)

1. a kind of can effectively weaken the LED electrical equipments of stroboscopic phenomenon, including current rectifying and wave filtering circuit and LED load circuit, rectification The output end of filter circuit and the input connection of LED load circuit, it is characterised in that：The input electricity of the current rectifying and wave filtering circuit Press satisfaction between Vi and output voltage V1：1.15Vi≤V1≤1.41Vi, the civil power that the LED load circuit includes series connection is specified Load group and dividing load group, the voltage difference at civil power nominal load group two ends is V2=Vi, and the civil power nominal load group includes Several LED being electrically connected to each other individuals.

2. a kind of the LED electrical equipments of stroboscopic phenomenon can be effectively weakened according to claim 1, it is characterised in that：It is described Civil power nominal load group includes several parallel with one another or series connection LED units, and each LED unit includes some be electrically connected to each other The individual and some current-limiting resistances of LED.

3. a kind of the LED electrical equipments of stroboscopic phenomenon can be effectively weakened according to claim 2, it is characterised in that：Rectification Filter circuit includes rectifier bridge, filter capacitor and bleeder resistance, and the input of rectifier bridge electrically connects with city, the filter capacitor with It is connected to after bleeder resistance is in parallel in the output end of rectifier bridge, the two ends of the filter capacitor form the output of current rectifying and wave filtering circuit End.

4. a kind of the LED electrical equipments of stroboscopic phenomenon can be effectively weakened according to claim 3, it is characterised in that：It is described The capacitance C of filter capacitor is：C >=0.289/ { f × (U/I) × ACv }, wherein, f is the pulse frequency of civil power, and U is rectifier bridge The maximum voltage of output end, I is current rectifying and wave filtering circuit maximum output current, 0.1≤ACv≤0.2.

5. a kind of the LED electrical equipments of stroboscopic phenomenon can be effectively weakened according to claim 4, it is characterised in that：It is described Filter capacitor is electrochemical capacitor, and the pressure voltage of filter capacitor is 400~450V.

6. a kind of the LED electrical equipments of stroboscopic phenomenon can be effectively weakened according to claim 5, it is characterised in that：It is described LED load circuit includes LED sub-circuits parallel with one another, and each LED sub-circuits include the civil power nominal load group of series connection With the dividing load group.

7. it is as claimed in any of claims 1 to 6 it is a kind of can effectively weaken the LED electrical equipments of stroboscopic phenomenon, its It is characterised by：The dividing load group includes divider resistance.

8. it is as claimed in any of claims 1 to 6 it is a kind of can effectively weaken the LED electrical equipments of stroboscopic phenomenon, its It is characterised by：The dividing load group includes LED bleeder circuits, and the LED bleeder circuits include the LED individuals of some electrical connections With the second current-limiting resistance.