CN102072418B - AC light-emitting diode device with high reliability and long service life - Google Patents
AC light-emitting diode device with high reliability and long service life Download PDFInfo
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- CN102072418B CN102072418B CN2009102259128A CN200910225912A CN102072418B CN 102072418 B CN102072418 B CN 102072418B CN 2009102259128 A CN2009102259128 A CN 2009102259128A CN 200910225912 A CN200910225912 A CN 200910225912A CN 102072418 B CN102072418 B CN 102072418B
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Abstract
The invention discloses an AC light-emitting diode device with high reliability and long service life, which comprises a light-emitting diode set, a rectifying diode set and an AC power supply. The light-emitting diode set consists of a plurality of light-emitting diode microchips connected in series, and the rectifying diode set comprises four rectifying diodes. The AC power supply is electrically connected to the rectifying diode set, and the rectifying diode set is then electrically connected to the light-emitting diode set. The AC power supply comprises a positive periodic voltage and a negative periodic voltage, and the rectifying diode set enables the light-emitting diode set to be conducted by the positive periodic voltage and the negative periodic voltage so as to prevent the light-emitting diodes from bearing high reverse bias voltage. Accordingly, the light-emitting life is prolonged, and the reliability is improved.
Description
Technical field
The present invention refers to a kind of high-reliability and long-lived AC light-emitting diode (LED) device that is applicable to AC power especially about a kind of light-emitting diode assembly.
Background technology
Day by day popularize along with what light emitting diode was used, industry has developed the alternating-current light emitting diode (AC LED) that to be fit to the AC power use at present.The AC power that alternating-current light emitting diode can directly use civil power and provided, the existing problem that light emitting diode can't directly use under AC power that solves of imitating.Yet alternating-current light emitting diode still has in technology at present needs improved problem.For example, the reverse bias of alternating-current light emitting diode will cause light emitting diode to produce reverse high pressure leakage current.
Existing alternating-current light emitting diode mainly is to adopt the framework of bridge rectifier to design alternating-current light emitting diode for example shown in Figure 1.As shown in the figure, when AC power 10 is in positive period, light emitting diode section a, e, c will be switched on, and light emitting diode section b, d bear reverse bias at this moment; When AC power 10 is in negative cycle, light emitting diode section b, e, d will be switched on, and light emitting diode section a, c bear reverse bias at this moment.Therefore, in this framework, light emitting diode section a, c, b, d alternately bear reverse bias.When the reverse bias that light emitting diode bore is excessive, just can produce high reverse bias leakage current, this phenomenon will cause the punch-through of light-emitting diode chip for backlight unit, or make whole luminescent lifetime, reliability produce unsettled influence.
Secondly; The light emitting diode section of existing alternating-current light emitting diode is not to light simultaneously, and when for example AC power 10 was in positive period, only light emitting diode section a, e, c conducting were lighted; When AC power 10 was in negative cycle, only light emitting diode section b, e, d conducting were lighted.Therefore, the framework of existing alternating-current light emitting diode can only have 2/3 light emitting diode section to be lighted, and because the light emitting diode section of existing alternating-current light emitting diode is an alternate conduction, and the variation of light and shade will be arranged and produces the phenomenon of light source scintillation.Hereat, be necessary really to improve to these problems.
Summary of the invention
In view of this, the present invention provides a kind of AC light-emitting diode (LED) device, to overcome the contrary higher pressure collapse leakage phenomenon that light-emitting diode chip for backlight unit was produced of bridge-type framework and the phenomenon of light source scintillation.
High-reliability provided by the present invention and long-lived AC light-emitting diode (LED) device comprise: a light emitting diode group, form by the light emitting diode microchip of a plurality of serial connections, and include an anode and a negative electrode; One commutation diode group; Comprise the first, second, third and the 4th commutation diode; The negative electrode of this first commutation diode connects the negative electrode of this second commutation diode and the anode of this light emitting diode group; The anode of this second commutation diode connects the negative electrode of the 3rd commutation diode, and the anode of the 3rd commutation diode connects the anode of the 4th commutation diode and the negative electrode of this light emitting diode group, and the negative electrode of the 4th commutation diode connects the anode of this first commutation diode; And an AC power, it is electrically connected to anode and the negative electrode of the 3rd commutation diode of this first commutation diode of this commutation diode group; Wherein, this AC power include one positive period a power supply and negative cycle power supply, this commutation diode group for cause this light emitting diode group in this positive period power supply and this negative cycle power supply all be switched on.
Description of drawings
Fig. 1 is existing alternating-current light emitting diode Organization Chart.
Fig. 2 is the sketch map of the present invention's one preferred embodiment.
Fig. 3 is the Organization Chart of the present invention's one preferred embodiment.
Fig. 4 A is the non-arranged sketch map of the light emitting diode microchip of the present invention's one preferred embodiment.
Fig. 4 B is the arranged sketch map of the light emitting diode microchip of the present invention's one preferred embodiment.
Fig. 5 is the solid brilliant routing sketch map of the support of the present invention's one preferred embodiment.
[main element symbol description]
10,20 AC powers a～e light emitting diode section
21 commutation diode groups, 22 light emitting diode groups
211～214 commutation diodes 211a～214a commutation diode anode
211b～214b commutation diode negative electrode 2201～2248 light emitting diode microchips
22a light emitting diode group anode 22b light emitting diode group negative electrode
3 packaged chips, 31 supports
32 sealings, 51 chips
The specific embodiment
Please in the lump with reference to figure 2 and Fig. 3, Fig. 2 is the sketch map of the present invention's one preferred embodiment, and Fig. 3 is the system architecture diagram of the present invention's one preferred embodiment.As shown in the figure, high-reliability of the present invention and long-lived AC light-emitting diode (LED) device comprise a commutation diode group 21, a light emitting diode group 22, an and AC power 20.Light emitting diode group 22 is made up of the light emitting diode microchip of a plurality of serial connections, and it preferably comprises the light emitting diode microchip 2201～2248 of 48 serial connections, and these 48 light emitting diode microchips 2201～2248 are produced in the chip 51.As shown in Figure 4, the layout of these these light emitting diode microchips 2201～2248 is that non-matrix form is arranged (Fig. 4 A) or matrix form is arranged (Fig. 4 B).
Then; Please refer to Fig. 3 and Fig. 5; Aforementioned commutation diode group 21 includes four commutation diodes; Be respectively the first, second, third and the 4th commutation diode 211～214, first to fourth commutation diode 211～214 of this commutation diode group 21 is each other diode element, and this diode element is a kenotron.Preferably, this commutation diode group 21 and light emitting diode group 22 are integrated in the packaged chip 3 jointly, and carry out solid brilliant routing by same support 31.As shown in the figure, first, second, third, fourth commutation diode 211～214 and the light emitting diode group 22 of commutation diode group 21 are arranged on the same support 31, and are encapsulated by a sealing 32, with common formation one encapsulating structure.
Please continue with reference to figure 2 and Fig. 3; Light emitting diode group 22 of the present invention is composed in series by 48 light emitting diode microchips 2201～2248, its account form by the starting resistor of the starting resistor of light emitting diode microchip 2201～2248, commutation diode 211～214, and the voltage of AC power 20 calculate and form.
In present embodiment, it is special that 20 of AC powers provide that the electricity is at 110 volts of pressure, is root-mean-square value, and its peak value is that root-mean-square value multiply by radical sign two, that is 156 volts.Its starting resistor of the commutation diode that present embodiment provided is 1 volt, and its starting resistor of light emitting diode microchip is 3.2 volts.When AC power 20 is in positive period, electric current flow through first commutation diode 211, light emitting diode group 22, and the 3rd commutation diode 213; When AC power 20 is in negative half period, electric current flow through second commutation diode 212, light emitting diode group 22, and the 4th commutation diode 214.AC power 20 is in its electric current of positive and negative cycle two commutation diodes of all flowing through; So 2 volts pressure drop is arranged; Thus, can calculate the light emitting diode microchip number that 22 of light emitting diode groups can comprise and be: (156-1*2)/3.2=48, also can include 48 light emitting diode microchips.
After 48 light emitting diode microchip 2201～2248 serial connections, have an anode 22a and a negative electrode 22b.The negative electrode 211b of first commutation diode 211 connects the negative electrode 212b of second commutation diode 212 and the anode 22a of light emitting diode group 22; The anode 212a of second commutation diode 212 connects the negative electrode 213b of the 3rd commutation diode 213; The anode 213a of the 3rd commutation diode 213 connects the anode 214a of the 4th commutation diode 214 and the negative electrode 22b of light emitting diode group 22, and the negative electrode 214b of the 4th commutation diode 214 connects the anode a of first commutation diode 211.20 of AC powers are electrically connected to the anode 211a of first commutation diode 211 and the negative electrode 213b of the 3rd commutation diode 213.
Via high-reliability provided by the present invention and long-lived AC light-emitting diode (LED) device, when AC power 20 is in positive period, first commutation diode 211 and the 3rd commutation diode 213 will be switched on, so can make also conducting of light emitting diode group 22.Likewise, when AC power 20 was in negative cycle, second commutation diode 212 and the 4th commutation diode 214 were switched on, so also can make 22 conductings of light emitting diode group.Hereat, commutation diode group 21 causes light emitting diode group 22 in all ability conductings of positive period power supply and negative cycle power supply, so that the light emitting diode microchip 2201～2248 of light emitting diode group 22 is lighted totally.
Secondly; When AC power 20 is in positive period; Electric current flow through first commutation diode 211, light emitting diode group 22, and the 3rd commutation diode 213, this moment second commutation diode 212, the 4th not conducting of commutation diode 214 will have been born reverse bias; When AC power 20 is in negative half period, electric current flow through second commutation diode 212, light emitting diode group 22, and the 4th commutation diode 214, this moment first commutation diode 211, the 3rd not conducting of commutation diode 213 will have been born reverse bias.
High-reliability provided by the present invention and long-lived AC light-emitting diode (LED) device, its commutation diode 211～214 can bear reverse bias and reach more than the 600-1000 volt, and its converse electrical leakage stream can be reduced to several μ A grades simultaneously.Hereat; Via commutation diode 211～214 provided by the present invention; Can avoid the light emitting diode microchip that bridge-type is arranged on the former alternating-current light emitting diode to collapse leakage phenomenon, so can prolong whole luminescent lifetime and promote its reliability in the contrary higher pressure that under the situation of higher pressure, is produced.
Yet the foregoing description only is to explain for ease and give an example, and the interest field that the present invention advocated is from should being as the criterion so that claim is said, but not only limits to the foregoing description.
Claims (7)
1. an AC light-emitting diode (LED) device is characterized in that, comprising:
One light emitting diode group is made up of the light emitting diode microchip of a plurality of serial connections, includes an anode and a negative electrode;
One commutation diode group; Comprise the first, second, third and the 4th commutation diode; The negative electrode of this first commutation diode connects the negative electrode of this second commutation diode and the anode of this light emitting diode group; The anode of this second commutation diode connects the negative electrode of the 3rd commutation diode, and the anode of the 3rd commutation diode connects the anode of the 4th commutation diode and the negative electrode of this light emitting diode group, and the negative electrode of the 4th commutation diode connects the anode of this first commutation diode; And
One AC power, it is electrically connected to anode and the negative electrode of the 3rd commutation diode of this first commutation diode of this commutation diode group;
Wherein, this AC power include one positive period a power supply and negative cycle power supply, this commutation diode group cause this light emitting diode group in this positive period power supply and this negative cycle power supply all be switched on.
2. AC light-emitting diode (LED) device as claimed in claim 1 is characterized in that, a plurality of light emitting diode microchips of this light emitting diode group are produced on the chip.
3. AC light-emitting diode (LED) device as claimed in claim 1 is characterized in that, first to fourth commutation diode of this commutation diode group is each other diode element.
4. AC light-emitting diode (LED) device as claimed in claim 3 is characterized in that, should each other diode element be kenotron.
5. AC light-emitting diode (LED) device as claimed in claim 1 is characterized in that, this light emitting diode group and this commutation diode group are integrated in the packaged chip.
6. AC light-emitting diode (LED) device as claimed in claim 5 is characterized in that, a plurality of light emitting diode microchips of this light emitting diode group are that non-matrix form is arranged.
7. AC light-emitting diode (LED) device as claimed in claim 5 is characterized in that, this light emitting diode group and this commutation diode group are carried out solid brilliant routing on a support.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102259128A CN102072418B (en) | 2009-11-23 | 2009-11-23 | AC light-emitting diode device with high reliability and long service life |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102259128A CN102072418B (en) | 2009-11-23 | 2009-11-23 | AC light-emitting diode device with high reliability and long service life |
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| Publication Number | Publication Date |
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| CN102072418A CN102072418A (en) | 2011-05-25 |
| CN102072418B true CN102072418B (en) | 2012-06-20 |
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| CN2009102259128A Expired - Fee Related CN102072418B (en) | 2009-11-23 | 2009-11-23 | AC light-emitting diode device with high reliability and long service life |
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| 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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| CN201166334Y (en) * | 2008-03-12 | 2008-12-17 | 四川通安实业有限公司 | Energy-saving environment-friendly type highway traffic signal lamp |
| KR100880818B1 (en) * | 2008-06-30 | 2009-01-30 | (주)우광테크 | An apparatus for detecting a current and a voltage intergrated with probe and that fo wireless transmitter |
| CN101360371A (en) * | 2008-08-15 | 2009-02-04 | 普照光电科技股份有限公司 | Power supply circuit for LED |
| CN201323679Y (en) * | 2008-12-05 | 2009-10-07 | 浩阳半导体股份有限公司 | Luminescent diode driving loop |
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2009
- 2009-11-23 CN CN2009102259128A patent/CN102072418B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2898568Y (en) * | 2004-12-27 | 2007-05-09 | 浙江天宇灯饰有限公司 | LED light string connected with bulb-style light string |
| CN2909777Y (en) * | 2005-03-31 | 2007-06-06 | 曾善平 | High power automatic energy-saving emergency lamp |
| CN201034265Y (en) * | 2007-02-27 | 2008-03-12 | 鹤山丽得电子实业有限公司 | LED bubble shell type Christmas lamp string |
| CN101286707A (en) * | 2007-04-12 | 2008-10-15 | 张亦翔 | LED energy saving lamp of power factor compensation type driven by constant-current |
| CN201043720Y (en) * | 2007-06-19 | 2008-04-02 | 天津医科大学总医院 | AC LED Lamp |
| CN201166334Y (en) * | 2008-03-12 | 2008-12-17 | 四川通安实业有限公司 | Energy-saving environment-friendly type highway traffic signal lamp |
| KR100880818B1 (en) * | 2008-06-30 | 2009-01-30 | (주)우광테크 | An apparatus for detecting a current and a voltage intergrated with probe and that fo wireless transmitter |
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| CN201323679Y (en) * | 2008-12-05 | 2009-10-07 | 浩阳半导体股份有限公司 | Luminescent diode driving loop |
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| CN102072418A (en) | 2011-05-25 |
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