CN201383889Y - LED circuit - Google Patents
LED circuit Download PDFInfo
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- CN201383889Y CN201383889Y CN200920063912U CN200920063912U CN201383889Y CN 201383889 Y CN201383889 Y CN 201383889Y CN 200920063912 U CN200920063912 U CN 200920063912U CN 200920063912 U CN200920063912 U CN 200920063912U CN 201383889 Y CN201383889 Y CN 201383889Y
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Abstract
The utility model discloses a LED circuit which comprises an over-current over-voltage protection unit connected with an ac power supply, a rectification filter unit, a power supply indication and rapid capacitor discharge unit and at least a group of LED load units; the ac input end of the over-current over-voltage protection unit is connected with the ac power supply, the ac output end thereof is connected with the ac input end of the rectification filter unit, the power supply indication and rapid capacitor discharge unit, and the LED load units are connected with the anode and cathode of the dc output end of the rectification filter unit in parallel. Compared with prior art, the LED circuit has the advantages of simple structure, stable performance, complete protection function and lower cost.
Description
Technical field
The utility model belongs to the LED lighting field, is specifically related to a kind of led circuit.
Background technology
Constantly descend along with the LED performance improves constantly with cost, LED will replace incandescent and fluorescent lamp as a kind of energy-saving and environmental protection, long-life new type light source.Led drive circuit at present commonly used has two types: the first kind is that to utilize switching power circuit that AC power is become the DC power supply driving LED luminous, and its element is more, and volume is bigger, and circuit is complicated, and cost is higher; Second class is that to utilize current rectifying and wave filtering circuit that AC power is become the DC power supply driving LED luminous; its element is less, and circuit is simple, and cost is lower; but the defencive function imperfection, electronic component and led light source damage easily because of factors such as over-voltage and over-current, thunderbolt, power supply noise interference.For overcoming the above problems, the utility model arises at the historic moment.
The utility model content
The purpose of this utility model is intended to overcome the deficiency of above-mentioned technology, provides a kind of simple in structure, stable performance, protect perfect, lower-cost led circuit.
The technical scheme that realizes the utility model purpose is as follows: led circuit, and it comprises over-current over-voltage protection unit, rectification filtering unit, the double quick drain unit of electric capacity of power supply indication, at least one group of LED load unit; Over-current over-voltage protection unit ac input end is connected with AC power; its ac output end is connected with the rectification filtering unit ac input end, and the power supply indication quick drain unit of electric capacity of holding concurrently is connected in parallel on the positive and negative end of current rectifying and wave filtering circuit unit dc output end with the LED load unit.
Described over-current over-voltage protection unit is composed in series by macromolecular thermosensitive resistor PPTC (being resettable fuse) and piezo-resistance VR; Described rectification filtering unit is made up of bridge rectifier D 1-D4, filter capacitor C1, high-frequency bypass capacitor C2; The double quick drain unit of electric capacity of described power supply indication is composed in series by resistance R 1 and light-emitting diode D5; Described LED load unit is connected with the current-limiting resistance R3 and the linear positive temperature coefficient compensating element, LPTC of parallel connection by after the voltage stabilizing didoe group WD1-WDm of voltage stabilizing didoe or series connection and the light-emitting diode group VD1-VDn parallel connection of connecting, and is composed in series with current-limiting resistance R2 again.
Compared with prior art, the characteristics that have of this led circuit are:
1, has constant voltage, constant current, noiseless, radiationless, anti-lightning strike, anti-overvoltage, anti-overflow, anti-overheated function.
2, have automatic protection and auto restore facility.
3, have LED load overcurrent, overtemperature compensate function.
4, overcome electric capacity when turning off the light and occurred the problem that time-delay is turned off the light slowly because of earial drainage;
5, overcome in test or the maintenance process, during because of load open circuit, the electric capacity both end voltage does not have the earial drainage loop and is easy to generate the problem of electric shock.
6, solved single voltage stabilizing didoe with single led when in parallel,, caused voltage stabilizing didoe can not effectively protect LED and damage or the voltage stabilizing didoe shunting causes the problem of each LED brightness disproportionation weighing apparatus because of the two discreteness difference.
7, solved that alternating voltage is too high, thunderbolt, noise jamming etc. cause that electronic component in the led circuit damages easily and the problem of the easy light decay of LED.
8, the utility model just can be realized dimming function as long as adjust the LED electric current.
9, the utility model is as long as increase the respective electronic control switch, just can realize touching, the AC power LED of multiple control modes such as remote control, induction, program control, acousto-optic control throws light on.
10, the utility model is simple in structure, and circuit is stable, and is easy to use.
11, the utility model led light source environmental protection, energy consumption is low, and the life-span is long, according to the recyclable utilization of product of this led circuit production.
12, the utility model circuit element is few, and cost is low, helps popularizing and promoting of AC power LED illumination.
The utility model is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Fig. 3 to Figure 10 is different embodiment circuit theory diagrams of the present utility model.
Embodiment
Led circuit block diagram of the present utility model is as shown in Figure 1: comprise over-current over-voltage protection unit 1, rectification filtering unit 2, power supply indication quick drain unit 3,1 to the n group LED load unit 4 of electric capacity of holding concurrently; Over-current over-voltage protection unit 1 is connected with AC power, and its other end is connected with rectification filtering unit 2, and the double quick drain unit 3 of electric capacity of power supply indication is organized the positive and negative end that LED load unit 4 is connected in parallel on rectification filtering unit 2 with n.
Circuit theory diagrams of the present utility model are as shown in Figure 2: described over-current over-voltage protection unit 1 is made up of macromolecular thermosensitive resistor PPTC (being resettable fuse) and piezo-resistance VR; Described rectification filtering unit 2 is made up of bridge rectifier D 1-D4, filter capacitor C1, high-frequency bypass capacitor C2; The double quick drain unit 3 of electric capacity of described power supply indication is composed in series by resistance R 1 and light-emitting diode D5; Described LED load unit 4 is made up of current-limiting resistance R2 and R3, linear positive temperature coefficient compensating element, LPTC, the voltage stabilizing didoe group WD1--WDm of series connection, the light-emitting diode group VD1--VDn of series connection.
In the described led circuit schematic diagram 2, the end of macromolecular thermosensitive resistor PPTC (being resettable fuse) is connected with the phase line of handing over source current, the other end of resettable fuse PPTC is connected with the end of pressure cell VR, and the other end of pressure cell VR is connected with the zero line of AC power; The negative pole of D1 and the positive pole of D4 are connected in resettable fuse PPTC and pressure cell VR common port and the bridge rectifier filter (D1-D4), the negative pole of D2 be connected with the zero line of AC power again after the positive pole of D3 is connected; The positive pole of D1 is connected output dc negative supply L (being called for short direct current ground) with the positive pole of D2, the negative pole of D3 is connected output dc positive power H with the negative pole of D4, electrolysis filter capacitor C1 and high-frequency bypass capacitor C2 and the double quick drain unit of electric capacity of (being composed in series with current-limiting resistance R1 by light-emitting diode D5) power supply indication are connected in parallel on both positive and negative polarity (H-L) two ends of rectification filtering unit; One end of the resistance R 2 in the LED load unit is connected with dc power anode H, linear positive temperature coefficient compensating resistance LPTC is in parallel with resistance R 3, the R2 other end and R3, the common port of LPTC connects, R3, the positive pole of first light-emitting diode VD1 in the negative pole of first voltage stabilizing didoe WD1 in another common port of LPTC and the voltage stabilizing didoe group of series connection and the light-emitting diode group of series connection is connected, the positive pole of WD1 is connected with the negative pole of next voltage stabilizing didoe, the rest may be inferred, the positive pole of last voltage stabilizing didoe WDm and direct current () L is connected, the negative pole of VD1 is connected with the positive pole of next light-emitting diode, the rest may be inferred, the negative pole of last light-emitting diode VDn and direct current () L is connected; When surpassing one group of LED load unit, each organizes the two ends that the LED load unit is connected in parallel on rectification filtering unit (H-L) both positive and negative polarity.Be used for common AC power LED illumination.
The operation principle of this led circuit:
One, when this led circuit during at rated operational voltage and rated operational current: the general insurance silk (or insurance resistance) that macromolecular thermosensitive resistor PPTC (resettable fuse) is equivalent to low resistance is connected between rectifier and the AC power; Piezo-resistance VR (being infinitely-great resistance) is connected in parallel on AC power two ends (this moment, VR did not influence the work of this led circuit), for this LED rectifier provides required AC power, after behind current rectifying and wave filtering circuit (D1-D4, C1, the C2) rectifying and wave-filtering, obtain DC power supply, as the DC power supply of double quick drain unit of electric capacity (R1, D5) of power supply indication and LED load unit (R2, R3, LPTC, VD1--VDn, WD1--WDm); R2 is the current-limiting resistance of LED load, for LED provides suitable operating current; The voltage stabilizing didoe in parallel with led light source do not have to puncture to be the approximates infinity resistance at this moment, so there is not electric current to pass through in the voltage stabilizing didoe substantially, can not waste energy; The linear positive temperature coefficient compensation of LPTC thermistor is low resistance when being operated in the rated operational current state, because of the resistance of R3 is far longer than the resistance of LPTC, so the operating current of led light source equates substantially with the electric current that flows through LPTC; This moment, led light source was operated in the nominal operation state.
Two, be operated in when being lower than rated voltage and rated operational current as this LED: operation principle is same.Have only when AC supply voltage is hanged down to certain value, the LED operating current is zero, and promptly LED extinguishes.Therefore, in the current-limiting resistance series circuit, increase adjustable resistance, can realize the LED lighting dimming.
Three, be operated in when being higher than in rated voltage and the rated operational current certain limit as this LED: operation principle is same.Promptly when the voltage at voltage stabilizing didoe WD1-WDm two ends is elevated to voltage stabilizing didoe voltage stabilizing value, there is electric current to pass through in the voltage stabilizing didoe, shunts to LED; Electric current among the linear simultaneously positive thermo-compensator LPTC increases and generates heat, and its resistance increases and reduces operating current conversely again, provides the constant pressure and flow DC power supply for led light source after the LPTC dynamic equilibrium, and led light source is operated in the nominal operation state equally.Current-limiting resistance R3 is in parallel with LPTC, has solved when transient voltage raises to cause LPTC to present very big resistance value and the problem that moment LED does not work occurs.
Four, when this LED is operated in superelevation operating voltage or super large operating current (when piezo-resistance the super large operating current occurs because of high-voltage breakdown or led circuit short circuit); the electric current among the resettable fuse PPTC of flowing through increases immediately and generates heat; the resistance moment that causes resettable fuse PPTC increases to infinitely great resistance value; be equivalent to moment disconnection AC power, thereby protected the electronic component in the led circuit.When alternating voltage recovered rated operational voltage or led circuit and recovers running current, because of PPTC and VR have self-recovering function, led circuit recovered normal operating conditions again automatically.
Five, when existing high frequency spike etc. to disturb in the AC power, high-frequency bypass capacitor is Low ESR, the various High-frequency Interference of filtering.
Six, current-limiting resistance R1 and light-emitting diode D5 series connection in the double quick drain unit of electric capacity of power supply indication is connected in parallel on DC power supply (H-L) two ends then; When turning on light as power indicating circuit; For electric capacity provides quick earial drainage loop, solved the problem that the LED time-delay is extinguished when turning off the light when turning off the light.
See Fig. 3, this circuit is to have increased Electronic Control to open also K on the basis of Fig. 2, and K is connected between resettable fuse PPTC and the AC power, can realize the AC power LED illumination of multiple control modes.
See Fig. 4, this circuit is to have increased electronic control switch K on the basis of Fig. 2, and K is connected between rectification filtering unit direct current output cathode H and the LED load unit current-limiting resistance R2, can realize the AC power LED illumination of multiple control modes.
See Fig. 5, this circuit is to have increased adjustable current-limiting resistance R4 on the basis of Fig. 2, and R4 is connected between rectification filtering unit direct current output cathode H and the LED load unit current-limiting resistance R2, can realize the AC power LED illumination of dimming mode.
Embodiment 5
See Fig. 6, this circuit is on the basis of Fig. 2, the led light source that how group is made up of the light-emitting diode of mutual series connection in the LED load unit all is connected in parallel on the two ends of one group of voltage stabilizing didoe of connecting mutually, led light source (VD1-VDn) to the series LED light source (VDN1-VDNn) that is about to series connection all is connected in parallel on the two ends of one group of voltage stabilizing didoe of connecting mutually (WD1-WDm), is used for common AC power LED illumination.
Embodiment 6
See Fig. 7, this circuit is to have increased electronic control switch K on the basis of Fig. 6, and K is connected between AC power and the resettable fuse PPTC, can realize the AC power LED illumination of multiple control modes.
Embodiment 7
See Fig. 8; this circuit is on the basis of Fig. 2; the 1st voltage stabilizing didoe WD1 in the LED load unit composed in parallel the 1st voltage stabilizing didoe (protection led light source) loop with the mutual light-emitting diode of connecting (VD1...VDn) of some; similarly; m voltage stabilizing didoe WDm composes in parallel m voltage stabilizing didoe (protection led light source) loop with the mutual light-emitting diode of connecting (VDN1...VDNn) of some; be in series mutually again between these voltage-regulator diode protection led light source loops (WD1--WDm) then, be used for common AC power LED illumination.
Embodiment 8
See Fig. 9, this circuit is to have increased electronic control switch K on the basis of Fig. 8, and K is connected between AC power and the resettable fuse PPTC, can realize the AC power LED illumination of multiple control modes.
Embodiment 9
See Figure 10, this circuit is to have increased adjustable current limiting element R4 on the basis of Fig. 8, and R4 is connected between rectification filtering unit direct current output cathode H and the LED load unit current-limiting resistance R2, can realize the interchange illumination of dimming mode LED.
In a word, Fig. 1 to Figure 10 is several better embodiment of the utility model, and change or modification that all are done according to this led circuit are all within the protection range of the utility model patent.
Claims (10)
1, a kind of led circuit is characterized in that comprising over-current over-voltage protection unit, rectification filtering unit, the double quick drain unit of electric capacity of power supply indication, at least one group of LED load unit; Over-current over-voltage protection unit ac input end is connected with AC power; its ac output end is connected with the rectification filtering unit ac input end, and the power supply indication quick drain unit of electric capacity of holding concurrently is connected in parallel on the positive and negative end of current rectifying and wave filtering circuit unit dc output end with the LED load unit.
2, led circuit according to claim 1 is characterized in that described over-current over-voltage protection unit is composed in series by macromolecular thermosensitive resistor PPTC and piezo-resistance VR; Described rectification filtering unit is made up of bridge rectifier D 1-D4, the filter capacitor C1 that is connected in parallel on bridge rectifier D 1-D4 dc output end, high-frequency bypass capacitor C2, and the ac input end of bridge rectifier D 1-D4 is in parallel with piezo-resistance VR; The double quick drain unit of electric capacity of described power supply indication is composed in series by resistance R 1 and light-emitting diode D5; Described LED load unit is connected with the current-limiting resistance R3 and the linear positive temperature coefficient compensating element, LPTC of parallel connection by after the voltage stabilizing didoe group WD1-WDm of voltage stabilizing didoe or series connection and the light-emitting diode group VD1-VDn parallel connection of connecting, and is composed in series with current-limiting resistance R2 again.
3, led circuit according to claim 2 is characterized in that being in series with between resettable fuse PPTC in described over-current over-voltage protection unit and the AC power that Electronic Control is opened and K.
4, led circuit according to claim 2 is characterized in that being in series with electronic control switch K between described rectification filtering unit direct current output cathode H and LED load unit current-limiting resistance R2.
5, led circuit according to claim 2 is characterized in that being in series with adjustable current-limiting resistance R4 between described rectification filtering unit direct current output cathode H and LED load unit current-limiting resistance R2.
6, led circuit according to claim 2 is characterized in that the voltage stabilizing didoe group parallel connection that the light-emitting diode group of organizing series connection are connected with a group more in the described LED load unit.
7, led circuit according to claim 6 is characterized in that being in series with between resettable fuse PPTC in described over-current over-voltage protection unit and the AC power that Electronic Control is opened and K.
8, led circuit according to claim 2 is characterized in that the light-emitting diode group parallel connection that each voltage stabilizing didoe is connected with a group respectively in the voltage stabilizing didoe group of the series connection in the described LED load unit.
9, led circuit according to claim 8 is characterized in that being in series with between resettable fuse PPTC in described over-current over-voltage protection unit and the AC power that Electronic Control is opened and K.
10, led circuit according to claim 8 is characterized in that being in series with adjustable current-limiting resistance R4 between described rectification filtering unit direct current output cathode H and LED load unit current-limiting resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920063912U CN201383889Y (en) | 2009-04-01 | 2009-04-01 | LED circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920063912U CN201383889Y (en) | 2009-04-01 | 2009-04-01 | LED circuit |
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|---|---|
| CN201383889Y true CN201383889Y (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200920063912U Expired - Fee Related CN201383889Y (en) | 2009-04-01 | 2009-04-01 | LED circuit |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102149233A (en) * | 2010-02-10 | 2011-08-10 | 辽宁宝林集团节能科技有限公司 | LED (Light Emitting Device) light source control device |
| CN102278722A (en) * | 2010-06-08 | 2011-12-14 | 李正恒 | Electronic ballast-type LED fluorescent lamp |
| CN102378444A (en) * | 2010-08-11 | 2012-03-14 | 三星Led株式会社 | LED lamp and driving circuit for the same |
| CN102404894A (en) * | 2010-09-08 | 2012-04-04 | 陈真 | Light emitting diode (LED) lamp capable of natural regulation and control by applying characteristics of LED pipe and thermistor |
| CN102401247A (en) * | 2010-09-08 | 2012-04-04 | 神讯电脑(昆山)有限公司 | Light emitting diode (LED) illumination equipment |
| CN102478220A (en) * | 2010-11-30 | 2012-05-30 | 金德荣科技股份有限公司 | Arranging method of LEDs |
| CN102506318A (en) * | 2011-10-25 | 2012-06-20 | 杭州鸿德照明科技有限公司 | Light-emitting diode (LED) bulb lamp with flame-retardant plastic shell |
| CN102623964A (en) * | 2011-01-31 | 2012-08-01 | 金威贸易有限公司 | Light emitting diode protection circuit |
| CN103152965A (en) * | 2013-03-06 | 2013-06-12 | 南安市柳城高捷图文设计工作室 | HID stabilizer power supply feedback circuit |
| WO2015149210A1 (en) * | 2014-03-31 | 2015-10-08 | 东莞高仪电子科技有限公司 | Led lamp panel, high-voltage pulse protection circuit of led lamp panel and led lamp |
| CN105829833A (en) * | 2013-12-13 | 2016-08-03 | 赫思曼自动化控制有限公司 | Surge-protected sensor element |
| CN105992426A (en) * | 2015-01-29 | 2016-10-05 | 赛尔富电子有限公司 | LED power supply discharge control circuit |
| CN106132021A (en) * | 2016-08-02 | 2016-11-16 | 惠勇 | A kind of close-coupled LED drive power |
| CN106888523A (en) * | 2017-04-12 | 2017-06-23 | 南京中电熊猫照明有限公司 | One kind exchange is straight to drive LED light source module system |
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2009
- 2009-04-01 CN CN200920063912U patent/CN201383889Y/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102149233B (en) * | 2010-02-10 | 2014-03-19 | 辽宁宝林集团节能科技有限公司 | LED (Light Emitting Device) light source control device |
| CN102149233A (en) * | 2010-02-10 | 2011-08-10 | 辽宁宝林集团节能科技有限公司 | LED (Light Emitting Device) light source control device |
| CN102278722B (en) * | 2010-06-08 | 2013-11-06 | 李正恒 | Electronic ballast-type led fluorescent lamp |
| CN102278722A (en) * | 2010-06-08 | 2011-12-14 | 李正恒 | Electronic ballast-type LED fluorescent lamp |
| CN102378444A (en) * | 2010-08-11 | 2012-03-14 | 三星Led株式会社 | LED lamp and driving circuit for the same |
| CN102401247A (en) * | 2010-09-08 | 2012-04-04 | 神讯电脑(昆山)有限公司 | Light emitting diode (LED) illumination equipment |
| CN102404894A (en) * | 2010-09-08 | 2012-04-04 | 陈真 | Light emitting diode (LED) lamp capable of natural regulation and control by applying characteristics of LED pipe and thermistor |
| CN102478220B (en) * | 2010-11-30 | 2013-06-19 | 金德荣科技股份有限公司 | Arranging method of LEDs |
| CN102478220A (en) * | 2010-11-30 | 2012-05-30 | 金德荣科技股份有限公司 | Arranging method of LEDs |
| CN102623964A (en) * | 2011-01-31 | 2012-08-01 | 金威贸易有限公司 | Light emitting diode protection circuit |
| EP2482617A1 (en) * | 2011-01-31 | 2012-08-01 | Midas Wei Trading Co., Ltd. | Light-emitting-diode (LED) protection circuit |
| CN102506318A (en) * | 2011-10-25 | 2012-06-20 | 杭州鸿德照明科技有限公司 | Light-emitting diode (LED) bulb lamp with flame-retardant plastic shell |
| CN103152965A (en) * | 2013-03-06 | 2013-06-12 | 南安市柳城高捷图文设计工作室 | HID stabilizer power supply feedback circuit |
| CN105829833A (en) * | 2013-12-13 | 2016-08-03 | 赫思曼自动化控制有限公司 | Surge-protected sensor element |
| WO2015149210A1 (en) * | 2014-03-31 | 2015-10-08 | 东莞高仪电子科技有限公司 | Led lamp panel, high-voltage pulse protection circuit of led lamp panel and led lamp |
| CN105992426A (en) * | 2015-01-29 | 2016-10-05 | 赛尔富电子有限公司 | LED power supply discharge control circuit |
| CN106132021A (en) * | 2016-08-02 | 2016-11-16 | 惠勇 | A kind of close-coupled LED drive power |
| CN106888523A (en) * | 2017-04-12 | 2017-06-23 | 南京中电熊猫照明有限公司 | One kind exchange is straight to drive LED light source module system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100113 Termination date: 20140401 |