CN101990329A - Eliminate AC LEDs generated by harmonic currents - Google Patents
Eliminate AC LEDs generated by harmonic currents Download PDFInfo
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- CN101990329A CN101990329A CN2009101602197A CN200910160219A CN101990329A CN 101990329 A CN101990329 A CN 101990329A CN 2009101602197 A CN2009101602197 A CN 2009101602197A CN 200910160219 A CN200910160219 A CN 200910160219A CN 101990329 A CN101990329 A CN 101990329A
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Abstract
The invention discloses an alternating current light emitting diode for eliminating harmonic current, which comprises: the LED comprises a first group of alternating current light emitting diodes, a second group of alternating current light emitting diodes and a resistor; the first group of alternating current light emitting diodes and the second group of alternating current light emitting diodes are connected to the resistor in parallel, and the resistor is electrically connected to an alternating current power supply end. The first and second groups of alternating current light emitting diodes are respectively provided with a forward starting voltage, and the overall starting voltage of the first and second groups of alternating current light emitting diodes after being connected in parallel is smaller than the voltage provided by the alternating current power supply end and smaller than the overall starting voltage of the first and second groups of alternating current light emitting diodes which are connected in series. Therefore, the alternating current light emitting diode can avoid the trouble of harmonic current in a semiconductor process or a packaging process.
Description
Technical field
The present invention relates to alternating-current light emitting diode, refer to a kind of alternating-current light emitting diode that is applicable to that the harmonic carcellation electric current produces especially.
Background technology
Along with the application of light-emitting diode is popularized day by day, developed at present to be fit to be connected to the alternating-current light emitting diode (AC LED) that AC power is used, the AC power that alternating-current light emitting diode can directly use civil power and provided just can have the effect of light illumination.
With alternating-current light emitting diode shown in Figure 1 is example, and the alternating-current light emitting diode of Fig. 1 includes four alternating-current light emitting diode blocks, and they are one another in series to be connected to an AC power feed end.Each alternating-current light emitting diode block all has a starting resistor forward, and the voltage that the AC power feed end is provided needs just can cause the alternating-current light emitting diode action greater than the starting resistor of alternating-current light emitting diode block integral.With Fig. 1 is example, each alternating-current light emitting diode block has a starting resistor 24V forward, because four alternating-current light emitting diode blocks are one another in series, therefore, if will start four alternating-current light emitting diode blocks, magnitude of voltage need reach 96V just can make it produce the effect of illumination.The 110V alternating current that is provided with general AC power feed end is an example, its peak value is that root-mean-square value multiply by radical sign two that is 156V, so, can make four alternating-current light emitting diode blocks produce light source, and the overall startup voltage of four alternating-current light emitting diode blocks and the comparison of alternating voltage, promptly as shown in Figure 2.
Yet, because the cause that is one another in series will make that the starting resistor of alternating-current light emitting diode integral body is too high.Measurement experience with the alternating-current light emitting diode application end is an example, too high forward starting resistor will cause the generation of harmonic current, previous settling mode, mainly be to solve on transducer (converter) circuit at light-emitting diode, but alternating-current light emitting diode is generally in order to save cost now, therefore on framework, can not use transducer (converter) circuit, therefore, just can only move to the problem of harmonic current in the light shield design of alternating-current light emitting diode and semiconductor technology or the packaging technology and solve.
Summary of the invention
Main purpose of the present invention provides the alternating-current light emitting diode that a kind of harmonic carcellation electric current produces, so that can make alternating-current light emitting diode in light shield design and semiconductor technology or packaging technology, solves the problem of harmonic current.
For reaching above-mentioned purpose, the invention provides a kind of light-emitting diode, comprising: one first group of alternating-current light emitting diode; One second group of alternating-current light emitting diode; And a resistance, including one first link, and one second link, this first link is electrically connected to this first group of alternating-current light emitting diode and this second group of alternating-current light emitting diode, and this second link is electrically connected to this AC power receiving terminal; Wherein, this first group, second group alternating-current light emitting diode has a starting resistor forward respectively, and this first group, second group alternating-current light emitting diode system and be attached to first link of this resistance.
Description of drawings
Fig. 1 is existing alternating-current light emitting diode schematic diagram;
Fig. 2 is existing alternating-current light emitting diode overall startup voltage and AC supply voltage comparison diagram;
Fig. 3 is the alternating-current light emitting diode schematic diagram of a preferred embodiment of the present invention;
Fig. 4 is the overall startup voltage and the AC supply voltage comparison diagram of a preferred embodiment of the present invention.
[main element symbol description]
1 alternating-current light emitting diode, 10 AC power feed ends
12 second groups of alternating-current light emitting diodes of 11 first groups of alternating-current light emitting diodes
111 first alternating-current light emitting diode blocks, 112 second alternating-current light emitting diode blocks
121 the 3rd alternating-current light emitting diode blocks 122 the 4th alternating-current light emitting diode block
2 resistance, 21 first links
22 second links
Embodiment
Please refer to Fig. 3, alternating-current light emitting diode 1 schematic diagram that Fig. 3 harmonic carcellation electric current of the present invention produces comprises: at least one group of alternating-current light emitting diode 11,12, an and resistance 2.In present embodiment, this at least one group of alternating-current light emitting diode 11,12 preferably comprises first group of alternating-current light emitting diode 11 and second group of alternating-current light emitting diode 12 in parallel.Aforementioned each group alternating-current light emitting diode 11,12 includes the alternating-current light emitting diode block 111,112 or 121,122 of a plurality of serial connections.In present embodiment, first group of alternating-current light emitting diode 11 includes one first alternating-current light emitting diode block 111, reaches one second alternating-current light emitting diode block 112; Second group of alternating-current light emitting diode 12 includes one the 3rd alternating-current light emitting diode block 121, reaches one the 4th alternating-current light emitting diode block 122.Resistance 2 include one first link 21, and one second link, 22, the first links 21 be electrically connected to first group of alternating-current light emitting diode 11, and second group of alternating-current light emitting diode 12, the second link be electrically connected to an AC power feed end 10.With the present invention is example, and this AC power feed end 10 is a civil power, gives alternating-current light emitting diode 1 of the present invention so that a voltage to be provided.
With embodiments of the invention is example, and the alternating-current light emitting diode block 111～112,121～122 of Fig. 3 all has a starting resistor value 24V forward.Because alternating-current light emitting diode block 111～112,121～122 is connected in series in twos again and connects, therefore, if will start four alternating-current light emitting diode blocks 111～112,121～122 simultaneously, it is that actuatable alternating-current light emitting diode block 111～112,121～122 is to produce the effect of illumination that magnitude of voltage only need reach 48V.Therefore, the resistance sizes of adjustable resistance 2, make across first group of alternating-current light emitting diode 11, and the forward starting resistor value of second group of alternating-current light emitting diode 12 get final product greater than 48V.For example, the voltage that AC power feed end 10 of the present invention is provided is 110V, its peak value is that root-mean-square value multiply by radical sign two that is 156V, the present invention designs this resistance 2 and has a resistance value to be equal to the equivalent resistance of first group of alternating-current light emitting diode 11, second group of alternating-current light emitting diode 12, so, can make across the voltage of resistance 2 and be equal to across the voltage of first group of alternating-current light emitting diode 11, second group of alternating-current light emitting diode 12.Therefore, root-mean-square value 55V, peak value 78V be will be, root-mean-square value 55V, peak value 78V will be similarly across the voltage of resistance 2 across the forward starting resistor of first group of alternating-current light emitting diode 11, second group of alternating-current light emitting diode 12.Since root-mean-square value 55V, peak value 78V greater than the forward starting resistor value 48V of first group of alternating-current light emitting diode 11, second group of alternating-current light emitting diode 12, just can activate effectively first group of alternating-current light emitting diode 11, and second group of alternating-current light emitting diode 12 to produce light source.The overall startup voltage of the light-emitting diode block 111～112,121～122 of present embodiment and the comparison of alternating voltage please refer to shown in Figure 4.
Compared to described four the alternating-current light emitting diode blocks of the prior art needed forward starting resistor 96V that is in series, the present invention sees through and is connected in series earlier and the structure that connects again, cooperate the utilization of resistance 2, starting resistor value 48V can move can to make alternating-current light emitting diode block 111～112,121～122 only need forward.Because forward the starting resistor value significantly reduces, therefore, just can effectively improve harmonic current and produce, so that alternating-current light emitting diode in light shield design and semiconductor technology or packaging technology, thoroughly solves the problem of harmonic current.
Yet the foregoing description is only given an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101602197A CN101990329A (en) | 2009-07-30 | 2009-07-30 | Eliminate AC LEDs generated by harmonic currents |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101602197A CN101990329A (en) | 2009-07-30 | 2009-07-30 | Eliminate AC LEDs generated by harmonic currents |
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| CN101990329A true CN101990329A (en) | 2011-03-23 |
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| CN2009101602197A Pending CN101990329A (en) | 2009-07-30 | 2009-07-30 | Eliminate AC LEDs generated by harmonic currents |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270632A (en) * | 2011-07-09 | 2011-12-07 | 内蒙古华延芯光科技有限公司 | High voltage light emitting diode and manufacturing method thereof |
| CN102842573A (en) * | 2012-09-05 | 2012-12-26 | 宁波市鄞州皓升半导体照明有限公司 | Alternating current light emitting diode structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1886017A (en) * | 2005-06-24 | 2006-12-27 | 冠德光电科技股份有限公司 | AC LED String Lights |
| CN1943276A (en) * | 2004-02-25 | 2007-04-04 | 迈克尔·米斯金 | AC light emitting diode and AC LED driving method and device |
-
2009
- 2009-07-30 CN CN2009101602197A patent/CN101990329A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1943276A (en) * | 2004-02-25 | 2007-04-04 | 迈克尔·米斯金 | AC light emitting diode and AC LED driving method and device |
| CN1886017A (en) * | 2005-06-24 | 2006-12-27 | 冠德光电科技股份有限公司 | AC LED String Lights |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270632A (en) * | 2011-07-09 | 2011-12-07 | 内蒙古华延芯光科技有限公司 | High voltage light emitting diode and manufacturing method thereof |
| CN102842573A (en) * | 2012-09-05 | 2012-12-26 | 宁波市鄞州皓升半导体照明有限公司 | Alternating current light emitting diode structure |
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Application publication date: 20110323 |