CN202172509U - High-energy efficiency alternating current light emitting diode (LED) lamp - Google Patents
High-energy efficiency alternating current light emitting diode (LED) lamp Download PDFInfo
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- CN202172509U CN202172509U CN2011202337990U CN201120233799U CN202172509U CN 202172509 U CN202172509 U CN 202172509U CN 2011202337990 U CN2011202337990 U CN 2011202337990U CN 201120233799 U CN201120233799 U CN 201120233799U CN 202172509 U CN202172509 U CN 202172509U
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Abstract
The utility model discloses a high-energy efficiency alternating current light emitting diode (LED) lamp, which comprises a bridge type rectification power supply, a singlechip, a plurality of groups of LED luminous units and a plurality of groups of high-pressure resistant triodes, wherein the LED luminous units are formed by connecting LEDs in series, the anode of the bridge type rectification power supply is connected with the LED luminous units connected with one another in series, the cathodes of the last but one group of LEDs are connected with a current-limiting resistor R14 to the anode of the last group of LED luminous units, is connected with a diode D5, and then is connected to an input end of a three-terminal voltage stabilization block, an output end of the three-terminal voltage stabilization block and a grounding electrode are respectively connected with a voltage drain drain (VDD) of the singlechip and the anode of a circuit; the cathodes of the last group of LEDs are connected with emitters of the plurality of groups of high-pressure resistant triodes to an input port T1 of the singlechip and then are connected with the cathode of a rectification bridge through a sampling resistor R15; the cathodes of each group of LED luminous units are respectively connected with collectors of the triodes; bases of each group of triodes are connected with a control end of the singlechip through a resistor; and an energy storage capacitor C2 is connected between the input end of the three-terminal voltage stabilization block and the cathode of the circuit. In the high-energy efficiency alternating current light emitting diode (LED) lamp, the LED luminous units are controlled according to segments, the lighting number of the LEDs is self-adaptively controlled according to the size of the current of the LEDs, approximate constant current is supplied to the LEDs; and meanwhile, electroless capacitor power supply is realized, and the energy efficiency and the reliability of the circuit are greatly improved.
Description
Technical field
The utility model relates to a kind of LED lamp, a kind of specifically interchange high energy efficiency LED lamp.
Background technology
Led light source is the most potential present green light source that becomes energy-conserving and environment-protective; Though the LED lamp is the energy-conserving and environment-protective products; At present commercial 80～120lm/w light efficiency has been highest level in all illuminating products, but still has the electric energy about 60% can not convert luminous energy into and convert heat energy into.
The LED lamp mainly contains Switching Power Supply constant current power supply LED lamp, AC constant-current source power supply LED lamp and capacitance decompression power supply LED lamp in the prior art.Switching Power Supply constant current power supply is the main supply power mode of current LED lamp; This mode is supplied power and can be made the maximum efficient of LED performance, but the efficient of Switching Power Supply itself generally can only reach about 80%, and nearly 20% energy loss is arranged; Owing to used a lot of electrochemical capacitors; During all LED light fixture work are calandrias, make the local high-temperature region that forms 50～70 degree even 85 degree of light fixture, can be very soon with the roasting evaporation of the electrolyte of electrochemical capacitor; Just lost efficacy very soon in the time of 1000 to 3000 hours, so Switching Power Supply constant current power supply is the long-lived mortal wound of LED lamp.Capacitance decompression power supply can only be used in the low-power circuit, and sort circuit is easy to punctured luminous tube by the High-frequency Interference in the circuit, its reliability be of limited application.
AC constant-current source power supply LED be ballast after resistance (or constant-current source circuit) is given a string LED power supply, the power supply essence of itself and AC LED lamp is the same.AC LED lamp is that up to a hundred single die LED form in the wafer scale serial connection; Can be under the civil power ac high voltage voluntarily rectification light; Series resistor or constant-current source remain in the suitable driving power scope again, and be as shown in Figure 1; Sinusoidal wave five-pointed star zone down is exactly the energy loss district (consumed power of resistance or constant-current source circuit) of AC LED among the figure; Square area is the effective energy district, and the triangular form zone is reactive power district (line voltage distribution is greater than the cut-in voltage of luminous tube and could works, and is about 240V like 80 luminous tube cut-in voltages).Because the characteristic of luminous tube has determined these two kinds of schemes in LED quantity one regularly, efficient and power output are a pair of contradiction, can only pursue the maximization of power output usually, and efficiency is limited.
The utility model content
The utility model technical problem to be solved is, overcomes the shortcoming of prior art, and a kind of interchange high energy efficiency LED lamp is provided, and realized the no electrolytic capacitor power supply, improved the reliability of circuit and the utilance of electric energy greatly.
In order to solve above technical problem; The utility model provides a kind of interchange high energy efficiency LED lamp; Comprise AC power, rectifier bridge, single-chip microcomputer, be connected in series LED luminescence unit that forms and the control switch how high pressure resistant triode of group is formed by many groups LED, the output of said AC power connects said rectifier bridge; The positive pole of said rectifier bridge is connected with the positive pole of first group of LED luminescence unit, and the negative pole of penult luminescence unit L13 connects the positive pole of last group luminescence unit L14 through current-limiting resistance R14;
The positive pole of said last group LED luminescence unit connects the input of receiving a three-terminal regulator block behind the diode D5 again; The positive pole of the said single-chip microcomputer of said three-terminal regulator block output termination; The negative pole of the said single-chip microcomputer of ground connection termination of said three-terminal regulator block, the negative pole of said single-chip microcomputer connects the negative pole of said rectifier bridge;
Said last group luminescence unit L14 is made up of three to four luminous tubes; Said last group luminescence unit L14 positive pole is connected the input of regulator block through D5; Its effect is the input voltage of restriction three-terminal regulator block except the lighting function that originally has, and plays the effect of protection three-terminal regulator block and capacitor C 2
The negative pole of said last group luminous tube is connected to single-chip microcomputer input port T1 with the emitter of the high pressure resistant triode of many groups, receives ballast bridge negative pole through sampling resistor R15 again; Through the voltage at measuring resistance R15 two ends, and then gather line current;
Between the negative pole of said three-terminal regulator block input and said rectifier bridge, be connected to storage capacitor C2, it is characterized in that capacitor is high-quality tantalum electric capacity.
The technical scheme that the utility model further limits is: aforesaid interchange high energy efficiency LED lamp; Two triodes that link to each other with the negative pole of said every group of LED luminescence unit are formed the Darlington triode; Each Darlington triode all is made up of two triodes, is divided into first triode and second triode, and the collector electrode of said first triode links to each other with the negative pole of said LED luminescence unit; The base stage of first triode is through the corresponding control port (P1-P13) link to each other of a resistance with said single-chip microcomputer; The emitter of first triode connects the base stage of second triode, and the collector electrode of said second triode links to each other with the negative pole of said LED luminescence unit, and the emitter of each second triode all links to each other successively; Use the Darlington triode can make Single-chip Controlling high-power LED pipe in the line and the output Control current is littler; Thereby reduce the capacity of storage capacitor C2, need not use big electrochemical capacitor, select for use high-quality tantalum electric capacity just can satisfy the power supply of control circuit.
Aforesaid interchange high energy efficiency LED lamp also is connected to high-frequency bypass capacitor between said bridge rectification power both positive and negative polarity, this electric capacity is withstand voltage CBB electric capacity greater than 400V, can effectively prevent the High-frequency Interference in the circuit.
Aforesaid interchange high energy efficiency LED lamp is connected to anti-interference capacitor C3 between the positive and negative polarities of said single-chip microcomputer, this anti-interference capacitor is a ROHS, has the impurity elimination ripple, the usefulness of anti-electromagnetic interference.
The beneficial effect of the utility model is: the utility model carries out segmentation control with the LED lamp; Control the quantity of lighting of LED lamp according to the size adaptation of LED electric current; In approximate constant current power supply, realized the no electrolytic capacitor power supply, the reliability of circuit and efficiency are greatly improved.
Description of drawings
Fig. 1 is existing alternating current constant current source LED energy consumption distribution map.
Fig. 2 is the utility model embodiment one circuit diagram.
Fig. 3 is the utility model embodiment one energy consumption distribution map.
Embodiment
Embodiment 1
A kind of interchange high energy efficiency LED lamp that present embodiment provides; Structure is as shown in Figure 2; Comprise AC power, rectifier bridge, single-chip microcomputer (PIC16F687), be connected in series LED luminescence unit string that forms and the control switch how high pressure resistant triode of group is formed by many groups LED luminescence unit, the output of said AC power connects said rectifier bridge; Between the bridge rectification power both positive and negative polarity, be connected to high-frequency bypass capacitor C1, be used for preventing the High-frequency Interference of circuit; The positive pole of said rectifier bridge is connected with the positive pole of first group of LED luminescence unit, receives the negative pole of ballast bridge after the negative pole of last group LED luminescence unit L14 and the emitter of all triodes are connected again through sampling resistor R15; Positive pole of last group luminous tube connects the input of receiving a three-terminal regulator block 78L05 behind the diode D5 again; The VDD pin of the said single-chip microcomputer of said three-terminal regulator block 78L05 output termination; The VSS pin of the said single-chip microcomputer of ground connection termination of said three-terminal regulator block 78L05, the negative pole of said single-chip microcomputer connects the negative pole of said rectifier bridge; Between the positive and negative polarities of single-chip microcomputer, be connected to anti-interference ROHS C3, be used for impurity elimination ripple and anti-tampering.
The negative pole of every group of said LED luminescence unit links to each other with the collector electrode of a Darlington triode respectively; Said each transistor base links to each other with the corresponding control port P1～P13 of said single-chip microcomputer through a resistance respectively; Negative pole of the continuous successively back of said each transistor emitter and last group luminous tube L14 links to each other and is further divided into two-way; Wherein one the tunnel connect the negative pole that connects said rectifier bridge behind the feedback resistance R15; Another road meets the first input end T1 of said single-chip microcomputer, is used to measure the voltage of feedback resistance R15, and then gathers line current; Between the positive pole of the negative pole of penult luminescence unit L13 and last group luminescence unit L14, be connected to current-limiting resistance R14.
Between the negative pole of said three-terminal regulator block input and said rectifier bridge, be connected to storage capacitor C2, said last group luminescence unit is 4 luminous tubes, and its positive pole is connected to the input of three-terminal regulator block through diode D5; Its effect is to regulator block power supply and restriction input voltage, plays the effect of protection storage capacitor C2 and three-terminal regulator block.
Each Darlington triode all comprises by two triodes and forming in the circuit; Be divided into first triode and second triode; The collector electrode of said first triode links to each other with the negative pole of said LED luminescence unit; The base stage of first triode links to each other with the corresponding control port P1～P13 of said single-chip microcomputer through a resistance; The emitter of first triode connects the base stage of second triode, and the collector electrode of said second triode links to each other with the negative pole of said LED luminescence unit, and the emitter of each second triode all links to each other successively.
The operation principle of the utility model: when alternating current is added on the LED lamp through rectifier bridge, from positive pole of last group luminescence unit L14 through diode D5 and voltage stabilizing circuit to single-chip microcomputer power supply (it is bright entirely that this moment, all triodes ended lamp); After the single-chip microcomputer work, through the voltage on the first input pin T1 measure R 15, thus the measurement circuitry electric current, when the descending variation of line current, electric current is during less than Imin; Open Q13, at this moment L14 goes out, and L1 is bright to L13, and circuit stops charging, and single-chip microcomputer leans on storage capacitor C2 power supply; The measurement circuitry electric current when electric current during less than Imin, is opened Q12, closes Q13, and at this moment L1 is bright to L12; Open Q1 by that analogy, close Q2, at this moment L1 is bright, continues the measurement circuitry electric current, when measuring the ascending variation of line current; Electric current is opened Q2 during greater than Imax, closes Q1, and at this moment L1 is bright to L2, and the rest may be inferred begins to rise and circulate; Up to the switch complete shut-down, lamp is bright entirely, begins new circulation.
Resistance R 15 is sampling resistors in the circuit, also is negative feedback resistor, can prevent that the circuit immediate current from burning out luminous tube too greatly;
Diode D5 can prevent capacitor C 2 current reflux;
Capacitor C 1 is a high-frequency bypass capacitor, the High-frequency Interference in the anti-circuit;
Capacitor C 2 is high-quality tantalum electric capacity (because as long as to the control circuit power supply, its capacity just can be worked with 33U/20V), makes that the useful life of all devices is suitable with the LED life-span.
As shown in Figure 3, the trigonum, two ends is the zone below the first string LED cut-in voltage, and 1 district expression first cluster of lamps, ornamental L1 is bright among the figure, and the 2nd district expression L1+L2 lamp is bright ..., by that analogy.The rectangular area, below is the ballast diode, switch triode, and the consumed power of resistance R 15, protrusions zone, 14 district is the storage capacitor charging, current-limiting resistance R14 service area, lamp is bright entirely, and electric current is through ballast tube, to L1 ... L13 gets back to negative pole to R14 to L14.In the present embodiment, the efficient at alternating voltage mean value place (0.637Um=0.637*311=198V) is: two ballast tubes consume 1.4V in this cover system, and triode consumes 0.8V, and resistance R 15 consumes 1.5V, so this Systems Theory energy conversion efficiency is:
Efficient=I (U-V)/IU=(198-1.4-0.8-1.5)/198=98.1%
Except that the foregoing description, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.
Claims (5)
1. one kind exchanges high energy efficiency LED lamp, comprises AC power, rectifier bridge, single-chip microcomputer and by the many groups of LED luminescence units that formed by the LED serial connection with organize high pressure resistant triode, the output of said AC power connects said rectifier bridge, it is characterized in that more:
The positive pole of said rectifier bridge is connected with the positive pole of first group of LED luminescence unit, and the negative pole of penult luminescence unit L13 connects the positive pole of last group luminescence unit L14 through current-limiting resistance R14;
The positive pole of said last group LED luminescence unit connects the input that inserts a three-terminal regulator block behind the diode D5 again; The positive pole of the said single-chip microcomputer of said three-terminal regulator block output termination; The negative pole of the said single-chip microcomputer of ground connection termination of said three-terminal regulator block, the negative pole of said single-chip microcomputer connects the negative pole of said rectifier bridge;
Said last group luminous tube L14 is made up of three to four luminous tubes, and said last organized luminous tube positive pole and connect the input that is connected to regulator block behind the diode D5; Said last group luminescence unit can limit the input voltage of three-terminal regulator block, is used to protect three-terminal regulator block and capacitor C 2;
The negative pole of said last group luminous tube is connected to single-chip microcomputer input port T1 with the emitter of the high pressure resistant triode of many groups, receives the circuit negative pole through sampling resistor R15 again; Through the voltage at measuring resistance R15 two ends, and then gather line current;
The negative pole of said every group of LED luminescence unit links to each other with the collector electrode of triode respectively; The base stage of every group of triode links to each other through the control end of resistance and single-chip microcomputer;
Between the negative pole of said three-terminal regulator block input and said rectifier bridge, be connected to storage capacitor C2, said electric capacity is high-quality tantalum electric capacity.
2. interchange high energy efficiency LED lamp according to claim 1; It is characterized in that: the triode that links to each other with the negative pole of said every group of LED luminescence unit is the Darlington transistor that two triodes are formed; Each Darlington triode all is made up of two triodes; Be divided into first triode and second triode; The collector electrode of said first triode links to each other with the negative pole of said LED luminescence unit, and the base stage of first triode links to each other with the corresponding control port of said single-chip microcomputer through a resistance, and the emitter of first triode connects the base stage of second triode; The collector electrode of said second triode links to each other with the negative pole of said LED luminescence unit, and the emitter of each second triode all links to each other successively.
3. interchange high energy efficiency LED lamp according to claim 1 is characterized in that: between said bridge rectification power both positive and negative polarity, also be connected to high-frequency bypass capacitor C1, said capacitor C 1 is withstand voltage CBB electric capacity greater than 400V, is used for preventing the High-frequency Interference of circuit.
4. interchange high energy efficiency LED lamp according to claim 1 is characterized in that: between the positive and negative polarities of said single-chip microcomputer, be connected to anti-interference capacitor C3, be used for impurity elimination ripple and anti-electromagnetic interference.
5. interchange high energy efficiency LED lamp according to claim 4, it is characterized in that: said anti-interference capacitor is a ROHS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202337990U CN202172509U (en) | 2011-06-28 | 2011-07-05 | High-energy efficiency alternating current light emitting diode (LED) lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120223878 | 2011-06-28 | ||
| CN201120223878.3 | 2011-06-28 | ||
| CN2011202337990U CN202172509U (en) | 2011-06-28 | 2011-07-05 | High-energy efficiency alternating current light emitting diode (LED) lamp |
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| CN202172509U true CN202172509U (en) | 2012-03-21 |
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| CN2011202337990U Expired - Fee Related CN202172509U (en) | 2011-06-28 | 2011-07-05 | High-energy efficiency alternating current light emitting diode (LED) lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103517520A (en) * | 2013-09-10 | 2014-01-15 | 深圳市晟碟半导体有限公司 | LED driving device |
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2011
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103517520A (en) * | 2013-09-10 | 2014-01-15 | 深圳市晟碟半导体有限公司 | LED driving device |
| CN103517520B (en) * | 2013-09-10 | 2014-10-29 | 深圳市晟碟半导体有限公司 | LED driving device |
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| Date | Code | Title | Description |
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| 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: 20120321 Termination date: 20130705 |