CN1774149B - Improved decorative lamp string - Google Patents
Improved decorative lamp string Download PDFInfo
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- CN1774149B CN1774149B CN2005101131519A CN200510113151A CN1774149B CN 1774149 B CN1774149 B CN 1774149B CN 2005101131519 A CN2005101131519 A CN 2005101131519A CN 200510113151 A CN200510113151 A CN 200510113151A CN 1774149 B CN1774149 B CN 1774149B
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Abstract
An improved decorative lamp string consists of head insertion and tail insertion being connected in series by two wires, bridge rectifying circuit with its DC output positive and negative electrodes being set on with head and tail insertion ends separately and its AC input end being connected to two wires, LED series section being series-connected between positive electrode and negative electrode of DC output from bridge rectifying circuit. It is featured as parallel-connecting at least a filtering capacity with DC output positive electrode or AC input end of bridge rectifying circuit and series-connecting at least a voltage drop element with AC input end.
Description
Technical field
The present invention relates to the lamp decoration field, especially a kind of improved circuit structure that is used to connect the LED decorative chain further, is the circuit structure that includes the LED decorative chain of one or more connectors.
Background technology
Because light-emitting diode (LED) has reliably, low power consuming, hang down superior functions such as working temperature and long life, LED Christmas lights and LED decorative lamp are more and more universal in the middle of people's life.The manufacturer of LED lamp decoration when maximization improves the brightness of LED lamp and other advantage, the gap between the production cost that dwindles LED lamp decoration and conventional incandescent lamp decoration of always trying every means.
As everyone knows, the LED lamp is worked under DC power supply and can have been given play to high brightness and long-life advantage.In addition, go to reduce DC pulse by a rectification (AC-DC conversion) circuit, the urgent hope of people can reduce the peak value of DC pulse, thereby reduces the voltage of LED lamp and increase the service life.
For example as shown in Figure 1, for saving production cost, 4 rectifier diodes in the rectification circuit can be separated into two groups, be separately positioned on the both sides of connecting circuit, the LED series block is connected between two groups of rectifier diodes, thereby saves the quantity of electric wire.
When comprising a plurality of LED series block, it connects as shown in Figure 2, the LED series block is connected in parallel with each other between two groups of rectifier diodes of circuit both sides, LED series block of every increase then needs to increase a lead, does not so just reach the purpose of saving lead, simultaneously, because a plurality of LED series block in parallel, load increases, and rectifier diode can heat up rapidly and cause overheatedly, produces extra potential safety hazard thereby increased the possibility that rectifier diode burnt out greatly.
The sine wave of AC-input voltage that shown in Figure 3 is, exchange the direct voltage pulse behind over commutation, the contrast figure of current impulse in diode current and the circuit that is connected by Fig. 1, circuit structure shown in Figure 2.As we know from the figure, contrast AC driving technology, the occupation efficiency of the circuit structure shown in Fig. 1,2 almost is the twice that exchanges input, the doubling frequency that the LED current peak occurs make LED lose " cooling time ", so the life-span of LED has descended 50% at least.
As the example of Fig. 3, in the rectification circuit of AC driving, the LED current peak all will reach 4 times of current average, and this mainly is to cause owing to comprising a large amount of capacitance/resistance in the prior art.As shown in Figure 1, 2, electric capacity and resistance are arranged in the circuit as the impedance component of series connection, reduce the mean value of LED drive current, but the ratio of current peak and mean value remain 4: 1.The prior art is not almost improved the waveform or the current peak of direct voltage, makes the life-span of LED descend 50% on the contrary.And, the capacitance/resistance that the lamp string comprises in the prior art has increased the power consumption of entire circuit, power 2.4W during DC input voitage 120V (supposing that the LED drive current is 20mA), and in the present invention, same hypothesis LED drive current is 20mA, only consumes 1.5W under the situation of identical luminous intensity reaching.
And, also there are many mistaken ideas in prior art in theory with in the practical application, especially Yi Xia viewpoint: because the characteristic of LED, the rated voltage of a typical LED is 2.2 volts, because of under the situation of 110V input voltage, every string LED series block must connect 50 LED lamps.
Suppose that AC-input voltage is 110 volts, the output voltage after the rectification approximately is 1.4 times of input voltage, just 154VDC.This can offer being connected in series of 70 typical LED lamps, and the voltage of every string is 2.2 volts.Yet, so also may go wrong, because the LED lamp generally requires DC power supply.
As shown in Figure 3, because the DC pulse of circuit is similar with the alternating-current pulse of power supply after the prior art rectification, so when calculating the series connection quantity of LED lamp, calculate with reference to exchanging pressure drop.When the total interchange pressure drop of calculating LED lamp Series lamp string, also to consider series impedance like this.When calculating with the direct current pressure drop, the impedance meeting of circuit is less than normal, so circuit has just become instability.
In order to further specify the shortcoming of original technology, pressure drop is that 70 LED lamps of direct current 2.2V (electric current is 20 person of outstanding talent's peaces) are connected in series in a full-wave rectifying circuit.When the AC-input voltage of rectification circuit is 110V, circuit can't normally move.Can not calculate by 2.2V so be connected on the pressure drop of the LED lamp in the circuit, should calculate by exchanging pressure drop 1.64V (electric current is 20 person of outstanding talent's peaces), circuit could normal operation like this.So at input voltage is when exchanging 110V, needs 94 LED lamps of series connection, circuit could safe operation.
Summary of the invention
In order to solve the shortcoming that prior art exists, the invention provides a kind of improved decorative chain, its safe in utilization, stable and saving power consumption.
The object of the present invention is achieved like this: a kind of improved decorative chain includes: slotting slotting with tail before one, this preceding inserting with tail is slotting is connected in series by two leads; One bridge rectifier, four rectifier diodes are divided into two groups at direct current output cathode and negative pole, are located at anterior insert end and tail spigot respectively, and ac input end is connected with two leads; One LED series block is series between the direct current output cathode and negative pole that above-mentioned bridge rectifier is divided into; It is characterized in that: be placed in ac input end, direct current output cathode or the direct current output negative pole of circuit both sides of described bridge rectifier is parallel with at least one filter capacitor, and ac input end is in series with at least one voltage drop element.
The direct current output cathode of the described circuit both sides that are placed in and direct current output negative pole are parallel with a filter capacitor respectively.
Two ac input ends of the described circuit both sides that are placed in are parallel with a filter capacitor respectively.
Be in series with a voltage drop element between described LED series block and the direct current output negative pole.
Be plugged with one or more full bridge rectifier in the described LED series block, the ac input end of this full bridge rectifier is connected and is connected with two leads behind at least one voltage drop element, and ac input end, direct current output cathode or direct current output negative pole are parallel with at least one filter capacitor.
As previously mentioned, the present invention increases at least one resistance or electric capacity in original circuit, reduces direct current output, makes waveform milder, reduces the load of LED lamp string when current peak greatly, can save about 40% energy resource consumption.Another advantage is, can connect the multi-string LED Series lamp string on the invention circuit and do not need to increase lead, and can avoid rectifier diode and burn out because of heating.
Description of drawings
Fig. 1 is a kind of connecting circuit structure chart of the prior art;
Fig. 2 is an another kind of connecting circuit structure chart of the prior art;
Fig. 3 is the voltage curve contrast that exchanges input and rectification output, and in the LED lamp string of ac power supply in LED current curve and Fig. 1, the connecting circuit shown in Figure 2 the current curve of LED contrast;
Fig. 4～Fig. 7 is the circuit connection diagram of four embodiment of the present invention;
Fig. 8 is the voltage curve contrast that exchanges input and rectification output, and in the LED lamp string of ac power supply in LED current curve and the connecting circuit of the present invention the current curve of LED contrast;
Fig. 9 is the circuit connection diagram of other four structures of the present invention.
Embodiment
Below describe the present invention in detail by concrete example, but the present invention is not limited to this specific examples.
The said bridge rectifier of the present invention comprises 4 rectifier diode D1-D4, per two diodes are one group, be divided into two groups at direct current output cathode and negative pole, LED series block 4 is series between the direct current output cathode and negative pole that above-mentioned bridge rectifier is divided into, its positive pole is connected with the direct current output cathode, and its negative pole is connected with the direct current output negative pole.Before being connected to and connecting, first group of rectifier diode D1, D2 insert on two leads 03 at 01 two ends the ac input end of diode be connected in series at least one resistance 06 or electric capacity 05.Filter capacitor 05 in parallel between the positive pole of first group two rectifier diode D1, D2 or between the negative pole.First group of rectifier diode output circuit may be anodal, also may be negative pole, and the direction of circuit is by the polarity decision of diode.Second group of rectifier diode D3, D4 oppositely are connected on two 03 leads that connect tail slotting 02.The same with first group of rectifier diode D1, D2, filter capacitor 05 in the parallel connection between the positive pole of second group two rectifier diode D3, D4 or between the negative pole.Be in series with an adjustable resistance 06 between LED series block 04 and the direct current output negative pole.
One or more intermediate circuits on the present invention can peg graft in LED series block 04 can parallel connection be gone up the LED multi-path segmentation and do not needed to increase extra lead like this, thereby alleviate the current loading of rectifier diode.
Fig. 4-the 7th, the citation form of circuit structure of the present invention, Fig. 8 has embodied the rectifying and wave-filtering effect of circuit of the present invention, making the life-span of LED lamp improve 1 times like this, we can say that also the power utilization of LED lamp is doubled, is the significant improvement to Fig. 1, Fig. 2 and prior art shown in Figure 3.Connecting circuit shown in Figure 9 is the further improvement on the basis of Fig. 4-7, has solved the defective of circuit diagram shown in Figure 2.
As shown in Figure 4, insert 01 before present embodiment includes, tail inserts 02, rectification circuit, LED series block 4 etc.Should before insert 01 and tail insert 02 and be connected in series by two leads 03.Bridge rectifier is made up of rectifier diode D1-D4, be divided into two groups at direct current output cathode and negative pole, be divided into anterior insert end and tail spigot both sides: the positive pole of rectifier diode D1, D2 is connected respectively with by being connected with two leads 03 with preceding slotting 01, and negative pole connects together and constitutes the direct current output cathode; The negative pole of rectifier diode D3, D4 is connected respectively with by being connected with two leads 03 with tail slotting 02, and positive pole connects together and constitutes the direct current output negative pole.LED series block 4 is series between the direct current output cathode and negative pole that above-mentioned bridge rectifier is divided into, and it is anodal to be connected with the direct current output cathode, and its negative pole is connected with the direct current output negative pole.Positive pole at rectifier diode D1 is in series with an adjustable resistance 06.Two filter capacitors 05 are parallel to direct current output cathode and direct current output negative pole respectively: a filter capacitor 05 is parallel between the positive pole of rectifier diode D1, D2, and another filter capacitor 05 is parallel between the negative pole of rectifier diode D3, D4.Be in series with an adjustable resistance 06 between LED series block 04 and the direct current output negative pole.
Embodiment 2
As shown in Figure 5, two filter capacitors 05 are parallel to the ac input end of both sides respectively: a filter capacitor 05 is parallel between the negative pole of rectifier diode D1, D2 of anterior insert end, and another filter capacitor 05 is parallel between the positive pole of rectifier diode D3, D4 of tail spigot.Other structures are with embodiment 1.
Embodiment 3
As shown in Figure 6, the adjustable resistance 06 that the ac input end of rectification circuit among the embodiment 1 is connected replaces to an electric capacity, and other are with embodiment 1.
Embodiment 4
As shown in Figure 7, the adjustable resistance 06 that the ac input end of rectification circuit among the embodiment 2 is connected replaces to an electric capacity, and other are with embodiment 2.
Embodiment 5
Based on embodiment 1-4, in LED series block 04, can be plugged with one or more middle rectifier control circuits 800, make whole piece LED series block 04 be divided into a plurality of LED segmentations.As shown in Figure 9, this centre rectifier control circuit 800 contains a complete full bridge rectifier, contact equally at least one voltage drop element (for example adjustable resistance 06 or electric capacity 05) back of its ac input end is connected with two leads 03, is parallel with at least one filter capacitor 05 at ac input end or direct current output cathode or direct current output negative pole.The position of the filter capacitor 05 in the middle rectifier control circuit 800 and the filter capacitor position symmetry in anterior insert end and the tail spigot, when for example the filter capacitor 05 in anterior insert end and the tail spigot is parallel to direct current output cathode and direct current output negative pole respectively, two filter capacitors 05 in the middle rectifier control circuit 800 also are parallel to direct current output cathode and the direct current output negative pole in its full bridge rectifier respectively, when the filter capacitor 05 in anterior insert end and the tail spigot was parallel to the ac input end of both sides respectively, two filter capacitors 05 in the then middle rectifier control circuit 800 also were parallel to the ac input end in its full bridge rectifier respectively.Middle rectifier control circuit 800 is with the LED segmentation of phase mutual connection end to end of lamp string demultiplexing.
In execution mode as shown in Figure 9, rectifier control circuit 800 in the middle of being plugged with one in the LED series block 04, make whole piece LED series block 04 be divided into two LED segmentations, the direct current output negative pole of middle rectifier control circuit 800 is connected with the negative pole of last LED segmentation, and the direct current output cathode of middle rectifier control circuit 11 is connected with the positive pole of back one LED segmentation, thereby be concatenated into the lamp string of a strip, middle rectifier control circuit 800 quantity of pegging graft in the lamp string are provided with according to actual needs, so just can produce sufficiently long LED lamp string as required and need not the potential safety hazard of considering that rectifier diode is excessive owing to underpower generates heat.Also be in series with an adjustable resistance 06 between the direct current output negative pole of the negative pole of LED segmentation and middle rectifier control circuit 800.
Middle rectifier control circuit 800 is by being serially connected with after the plastic encapsulation in the LED series block 04.
Be positioned at the current rectifying and wave filtering circuit and preceding 01 aggregate erection and the plug 07 by being integral of plastic encapsulation inserted of anterior insert end, the current rectifying and wave filtering circuit that is positioned at the tail spigot and slotting 02 aggregate erection of tail and the plug 08 by being integral of plastic encapsulation.Perhaps, two groups of rectifier diodes are connected with preceding slotting 01 or tail slotting 02 respectively by lead respectively by after the plastic encapsulation.
Claims (6)
1. decorative chain includes:
--preceding (01) and the tail slotting (02) inserted, slotting (01) and tail slotting (02) are connected in series by two leads (03) before this;
--bridge rectifier, four rectifier diodes (D1-D4) are divided into two groups at direct current output cathode and negative pole, are located at anterior insert end and tail spigot respectively, and ac input end is connected with two leads (03);
--LED series block (04) is series between the direct current output cathode and negative pole that above-mentioned bridge rectifier is divided into;
It is characterized in that: the be placed in ac input end of circuit both sides of described bridge rectifier is parallel with a filter capacitor (05) respectively, and ac input end is in series with at least one resistance or electric capacity; Be plugged with one or more full bridge rectifier in the described LED series block (04), the ac input end of this full bridge rectifier is connected and is connected with two leads (03) behind at least one voltage drop element, and ac input end, direct current output cathode or direct current output negative pole are parallel with at least one filter capacitor (05).
2. decorative chain according to claim 1 is characterized in that: the position in parallel symmetry of the position in parallel of the filter capacitor in the described full bridge rectifier (05) and the filter capacitor (05) of anterior insert end and tail spigot.
3. decorative chain according to claim 1 is characterized in that: be in series with a voltage drop element between the full bridge rectifier direct current output negative pole of described LED series block (04) and centre.
4. decorative chain according to claim 3 is characterized in that: described voltage drop element is adjustable resistance (06) or electric capacity (05).
5. decorative chain according to claim 1 is characterized in that: described two groups of rectifier diodes that are positioned at anterior insert end or tail spigot, and respectively with the preceding plug (07,08) of inserting (01) or slotting (02) being integral of aggregate erection of tail.
6. decorative chain according to claim 1 is characterized in that: described two groups of rectifier diodes that are positioned at anterior insert end or tail spigot are inserted (02) by lead with preceding slotting (01) or tail and are connected respectively by after the plastic encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101131519A CN1774149B (en) | 2005-10-15 | 2005-10-15 | Improved decorative lamp string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101131519A CN1774149B (en) | 2005-10-15 | 2005-10-15 | Improved decorative lamp string |
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| Publication Number | Publication Date |
|---|---|
| CN1774149A CN1774149A (en) | 2006-05-17 |
| CN1774149B true CN1774149B (en) | 2010-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101131519A Active CN1774149B (en) | 2005-10-15 | 2005-10-15 | Improved decorative lamp string |
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| CN (1) | CN1774149B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0805304A2 (en) * | 1996-05-01 | 1997-11-05 | Hiyoshi Electric Co., Ltd. | Long light emitting apparatus |
| CN2516806Y (en) * | 2001-11-30 | 2002-10-16 | 上海威廉照明电气有限公司 | Belt-shape light-emitting diode lamp |
| US6641294B2 (en) * | 2002-03-22 | 2003-11-04 | Emteq, Inc. | Vehicle lighting assembly with stepped dimming |
| CN2891575Y (en) * | 2005-10-17 | 2007-04-18 | 光纤设计公司 | Improved decorative lamp string |
-
2005
- 2005-10-15 CN CN2005101131519A patent/CN1774149B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0805304A2 (en) * | 1996-05-01 | 1997-11-05 | Hiyoshi Electric Co., Ltd. | Long light emitting apparatus |
| CN2516806Y (en) * | 2001-11-30 | 2002-10-16 | 上海威廉照明电气有限公司 | Belt-shape light-emitting diode lamp |
| US6641294B2 (en) * | 2002-03-22 | 2003-11-04 | Emteq, Inc. | Vehicle lighting assembly with stepped dimming |
| CN2891575Y (en) * | 2005-10-17 | 2007-04-18 | 光纤设计公司 | Improved decorative lamp string |
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| Publication number | Publication date |
|---|---|
| CN1774149A (en) | 2006-05-17 |
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