CN204968206U - Eliminate stroboscopic power of AC -LED chip conversion circuit - Google Patents
Eliminate stroboscopic power of AC -LED chip conversion circuit Download PDFInfo
- Publication number
- CN204968206U CN204968206U CN201520804748.7U CN201520804748U CN204968206U CN 204968206 U CN204968206 U CN 204968206U CN 201520804748 U CN201520804748 U CN 201520804748U CN 204968206 U CN204968206 U CN 204968206U
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- alternating current
- led
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Led Devices (AREA)
Abstract
The utility model provides an eliminate stroboscopic power of AC -LED chip conversion circuit, relates to the power. Be equipped with protection circuit, alternating current power supply wave filter and conversion circuit, the input of protection circuit connects in parallel at mains input terminal, the output of the input termination protection circuit of alternating current power supply wave filter, the conversion circuit is equipped with reduction voltage circuit, positive feedback circuit and boost circuit, the output of the input termination alternating current power supply wave filter of reduction voltage circuit, the output of positive feedback circuit's input termination reduction voltage circuit, boost circuit's input termination positive feedback circuit's output, the alternating current power supply wave filter is arranged in the high frequency noise of filtering commercial power to disturb and a lot of harmonic, restraines voltage spike, the interference elimination radiation, the reduction voltage circuit is used for turning into low -voltage sinusoidal signal with the high -pressure sinusoidal signal through filtering, positive feedback circuit is used for changing low -voltage sine wave signal into square wave signal, boost circuit is used for enlargeing the square wave signal.
Description
Technical field
The utility model relates to power supply, especially relates to a kind of power-converting circuit eliminating AC-LED chip stroboscopic.
Background technology
LED is popular in illumination market as forth generation light source, and not only energy-saving and environmental protection, life-span are long, and controllability is high.Common LED illumination generally uses direct current supply, needs drive circuit support, and civil power-alternating current step-down, rectification are converted into direct current.Relevant various intelligent lighting controls are also control based on the PWM of direct current.
AC-LED is made up of multiple LED chip, directly can be connected on by chip on 220V/110V sinusoidal ac and work.It consists of bridge architecture or several groups of opposite polarity LED strip parallel connections.The mode of operation of AC-LED is: at the positive half period of sinusoidal ac, be in forward biased part LED chip and start working, and another part chip is in reverse bias-resting state; Vice versa.So, AC-LED alternation with sinusoidal ac mechanical periodicity, thus make AC-LED can be luminous in the sinusoidal ac whole cycle.AC-LED compares DC-LED and manufactures convenient, only needs after scribing well, carry out lead-in wire key and connects and encapsulation, can be fewer than DC-LED manufacturing effort.AC-LED is thrown light on there is very large market value so high brightness, high voltage, small area analysis, volume be little, be easy to the advantages such as the manufacturing.
On market, AC-LED lighting device mainly contains 2 kinds: 1.DC-LED and adds decompression rectification power module as AC-LED.But this is not the AC-LED of real meaning.2. be directly AC-LED chip is arranged in lighting device, directly access civil power, minority lighting device can be provided with regulating filtering module, but this can not effectively solve stroboscopic problem.
AC-LED stroboscopic phenomenon is more serious than DC-LED, as lighting source, there is significant limitation.Stroboscopic can bring a series of adverse influence to health, tired etc. as headache, kopiopia and body and mind, even causes nervous-system problems, affects job performance and animation.
The stroboscopic problem that AC-LED also exists in using is that restriction AC-LED is applied to the one of the main reasons of throwing light on and promoting the use of.The perception of human eye to light source stroboscopic depends on amplitude variations and the frequency size of light-source brightness.Namely the change of brightness is the fluctuation degree of depth, usually represents with its brightness value by the percent modulation of amplitude.Experiment proves, the frequency difference of lighting source makes the amplitude-modulated threshold percentage of the discernable stroboscopic of human eye also different.Require higher lower than during 15Hz to amplitude modulation factor in frequency, even if less amplitude modulation factor will perception stroboscopic, but when light source frequency of oscillation reaches more than 50Hz, human eye just not easily perceives stroboscopic.Light-source brightness is higher, and its critical flicker frequency can corresponding improve.
Just (bear) half period each of AC signal, AC-LED can reach threshold voltage and open and close once, in a sinusoidal cycles, opens twice, closes twice.So within each second, AC-LED can change unlatching 100 times along with alternating current, closes 100 times.The alternately change that these 100 light are dark can cause brightness to fluctuate, and this causes stroboscopic factor.In addition, at each open period, brightness is the constantly change with the change of sinusoidal voltage amplitude, and the fluctuation of this brightness is exactly one of main source causing the fluctuation degree of depth.Simultaneously, AC-LED is at the changing period along with voltage magnitude, and fluctuation change also can occur the temperature of generation thereupon, and then affects the voltage amplitude of AC-LED conversely, cause, originally changing the electrical property change that on basis, generation one is additional, causing the irregular change of AC-LED brightness.Thisly directly be connected on the stroboscopic problem that the additional fluctuation degree of depth that civil power causes can deepen AC-LED greatly.
Summary of the invention
The purpose of this utility model is the stroboscopic phenomenon occurred when being applied to the lighting device such as bulb lamp, ceiling light mainly for AC-LED (bridge-type LED or reverse parallel connection LED strip) truly, provides a kind of power-converting circuit eliminating AC-LED chip stroboscopic.
The utility model is provided with protective circuit, alternating current supply filter and conversion circuit;
The input of described protective circuit is connected in parallel on mains electricity input end, the output of the input termination protective circuit of described alternating current supply filter, described conversion circuit is provided with reduction voltage circuit, regenerative circuit and booster circuit, the output of the input termination alternating current supply filter of reduction voltage circuit, the output of the input termination reduction voltage circuit of regenerative circuit, the output of the input termination regenerative circuit of booster circuit; The high-frequency noise that alternating current supply filter is used in filtering civil power disturbs and multiple harmonic, suppresses due to voltage spikes, eliminates interference emission; Reduction voltage circuit is used for the high pressure sinusoidal signal through filtering to be converted into low-voltage sinusoidal signal; Regenerative circuit is used for low-voltage sine wave signal to change into square-wave signal; Booster circuit is for amplifying square-wave signal.
Described protective circuit can adopt surge suppressor, and surge suppressor can select piezo-resistance or twin zener dioder.Surge suppressor can play the effects such as surge on limiting circuitry, instantaneous overvoltage and the overcurrent of releasing on circuit.Being burn to prevent civil power surge from causing device current excessive at this, protecting whole circuit system and AC-LED chip steady operation, increasing the service life, relatively reducing production cost.
Alternating current supply filter can be made up of high frequency filter and common mode inductance.High frequency filter is for absorbing the high-frequency noise interference of the short-and-medium wave band of coming in from power line conduction; Common mode inductance is made up of the inductor winding around same iron core both sides, equal turn numbers, for absorbing the humorous wave interference produced because of wave distortion in mains supply.The high-frequency noise that alternating current supply filter is eliminated in civil power disturbs and multiple harmonic, suppresses due to voltage spikes, eliminates interference emission.Relatively pure power supply can be obtained, reduce the impact on voltage magnitude, reduce the fluctuation degree of depth of AC-LED.
Conversion circuit can be provided with reduction voltage circuit, regenerative circuit and booster circuit, Main Function is that low-voltage is fallen in 220V sinusoidal ac signal, then the low-voltage square-wave signal needed for being generated by regenerative circuit, changes into the square-wave signal of 220Vpp finally by booster circuit.Because the rated current of AC-LED is 50mA rank, so this power-converting circuit can meet load play AC-LED.Square-wave signal is equivalent to voltage stabilizing in the positive/negative cycle, and the most suitable mode of operation of diode is exactly voltage stabilizing/constant current mode, and LED strip is like this equally.Just (bearing) half period, the AC-LED of constant amplitude sends lightness stabilized light, then do not fluctuate the degree of depth; And constant voltage magnitude can allow AC-LED produce the temperature of a relative constancy, would not have additional temperature fluctuation, thus the change of voltage magnitude is caused to cause the superposition fluctuation degree of depth.
The stroboscopic phenomenon that the utility model occurs when being applied to the lighting device such as bulb lamp, ceiling light mainly for AC-LED (bridge-type LED or reverse parallel connection LED strip) truly proposes optimal solution, uses the power module more meeting AC-LED photoelectric properties to eliminate stroboscopic phenomenon.
So the utility model is from consideration production cost, do not change supply frequency, solve from power supply wave shape the fluctuation degree of depth causing stroboscopic problem.
Solve stroboscopic problem, just must consider from basic reason, consider the unlatching of AC-LED, close the brightness change caused; Consider the fluctuation degree of depth factor that the change of the brightness that change in voltage directly causes causes; Consider that self-heating fluctuate the auxiliary voltage amplitude change caused, and can cause the factor such as the degree of depth that fluctuates unexpectedly indirectly.Consider to carry out reformed AHP to the powering mode of AC-LED at this utility model, use more suitably square wave to power, to reduce the interference of above factor, obtain a better illuminating effect, thus promote the use of AC-LED.
Adopt square wave to power and contrast sinusoidal wave benefit of powering: 1. to conduction period, square-wave voltage does not change in each just (instead), brightness can not be caused to change, cause the fluctuation degree of depth, greatly be better than the mode of operation of sinusoidal wave civil power.2. conduction period, square-wave voltage does not change, so just little to the influence amount of AC-LED temperature, and the continuous fluctuation of sine-wave power can be added to the temperature of AC-LED mono-fluctuation, this fluctuating temperature can react on the voltage magnitude of AC-LED, thus the impact indirectly produced brightness, cause the superposition fluctuation degree of depth, so stroboscopic phenomenon will aggravate.3. in just (instead) to the cycle, the voltage of same effective value, the efficiency of obvious rectangular ripple is higher than alternating current, and this will improve effective utilization of electric current greatly, improves power factor.4. there is the high-frequency noise using alternating current supply filter to eliminate in civil power to disturb and multiple harmonic in power-converting circuit, the fluctuation degree of depth can be weakened one step ahead.Regenerative circuit can generate the amplitude of oscillation obviously in addition, and rise/fall is along precipitous square wave, and the square wave of relative ideal can reduce the fluctuation degree of depth.5. contrast sinusoidal mode of operation to need to reach threshold voltage unlatching, square wave mode of operation duty ratio is close in nothing, and efficiency is high, causes the fluctuation degree of depth to be close in nothing.
Accompanying drawing explanation
Fig. 1 is the AC-LED chip structure of existing employing bridge-type LED.
Fig. 2 is the AC-LED chip structure of existing employing reverse parallel connection LED strip.
Fig. 3 is the contrast (sinusoidal wave and square wave) before and after waveform transformation.
Fig. 4 is the schematic diagram of structure composition and application in embodiment.
Embodiment
Below in conjunction with accompanying drawing, concrete principle explaination is carried out to the utility model.The utility model mainly with by the pure conversion civil power of suitable circuit, obtains the square wave power supply being more applicable to AC-LED photoelectric properties.Multiple way of realization can be had, be not limited to the concrete form that this specification describes, as long as meet purport of the present utility model.
Fig. 1 and 2 provides the AC-LED chip structure of existing employing bridge-type LED and reverse parallel connection LED strip.
See Fig. 3 and 4, the utility model embodiment is provided with protective circuit 1, alternating current supply filter 2 and conversion circuit; The input of described protective circuit 1 is connected in parallel on mains electricity input end, the output of the input termination protective circuit 1 of described alternating current supply filter 2, described conversion circuit is provided with reduction voltage circuit 3, regenerative circuit 4 and booster circuit 5, the output of the input termination alternating current supply filter 2 of reduction voltage circuit 3, the output of the input termination reduction voltage circuit 3 of regenerative circuit 4, the output of the input termination regenerative circuit 4 of booster circuit 5; Alternating current supply filter 2, for the high-frequency noise interference in filtering civil power and multiple harmonic, suppresses due to voltage spikes, eliminates interference emission; Reduction voltage circuit 3 is for being converted into low-voltage sinusoidal signal by the high pressure sinusoidal signal through filtering; Regenerative circuit 4 is for changing into square-wave signal by low-voltage sine wave signal; Booster circuit 5 is for amplifying square-wave signal.
Described protective circuit can adopt surge suppressor, and surge suppressor can select piezo-resistance or twin zener dioder.Surge suppressor can play the effects such as surge on limiting circuitry, instantaneous overvoltage and the overcurrent of releasing on circuit.Being burn to prevent civil power surge from causing device current excessive at this, protecting whole circuit system and AC-LED chip steady operation, increasing the service life, relatively reducing production cost.
Alternating current supply filter can be made up of high frequency filter and common mode inductance.High frequency filter is for absorbing the high-frequency noise interference of the short-and-medium wave band of coming in from power line conduction; Common mode inductance is made up of the inductor winding around same iron core both sides, equal turn numbers, for absorbing the humorous wave interference produced because of wave distortion in mains supply.The high-frequency noise that alternating current supply filter is eliminated in civil power disturbs and multiple harmonic, suppresses due to voltage spikes, eliminates interference emission.Relatively pure power supply can be obtained, reduce the impact on voltage magnitude, reduce the fluctuation degree of depth of AC-LED.
Conversion circuit can be provided with reduction voltage circuit 3, regenerative circuit 4 and booster circuit 5, Main Function is that low-voltage is fallen in 220V sinusoidal ac signal, then the low-voltage square-wave signal needed for being generated by regenerative circuit, changes into the square-wave signal of 220Vpp finally by booster circuit.Because the rated current of AC-LED is 50mA rank, so this power-converting circuit can meet load play AC-LED.Square-wave signal is equivalent to voltage stabilizing in the positive/negative cycle, and the most suitable mode of operation of diode is exactly voltage stabilizing/constant current mode, and LED strip is like this equally.Just (bearing) half period, the AC-LED of constant amplitude sends lightness stabilized light, then do not fluctuate the degree of depth; And constant voltage magnitude can allow AC-LED produce the temperature of a relative constancy, would not have additional temperature fluctuation, thus the change of voltage magnitude is caused to cause the superposition fluctuation degree of depth.
The stroboscopic phenomenon that the utility model occurs when being applied to the lighting device such as bulb lamp, ceiling light mainly for AC-LED (bridge-type LED or reverse parallel connection LED strip) truly proposes optimal solution, uses the power module more meeting AC-LED photoelectric properties to eliminate stroboscopic phenomenon.
So the utility model is from consideration production cost, do not change supply frequency, solve from power supply wave shape the fluctuation degree of depth causing stroboscopic problem.
In fact, civil power is not desirable sine wave, but there are multiple harmonic, high-frequency noise interference, due to voltage spikes, interference emission etc.But the square wave of approximate ideal can be changed into by power module of the present utility model.
Fig. 3 is applied to the power module structure schematic diagram solving AC-LED stroboscopic problem, is made up of protective circuit, filtration module and conversion circuit.Power-converting circuit of the present utility model can be arranged on inside the power storehouse of bulb lamp or ceiling light.Civil power flows into power-converting circuit 2 by protective circuit and filtration module, and the square wave obtaining approximate ideal is transported to AC-LED chip again.
Illustrate power-converting circuit how to generate approximate ideal and to be applicable to the square wave of AC-LED photoelectric properties curve below with reference to accompanying drawing 3.Whole power-converting circuit comprises protection, filtering, the large module of conversion 3.Protective circuit forms primarily of piezo-resistance 21, is connected in parallel on mains electricity input end.When surge crest appears in civil power, excessive electric current can flow through piezo-resistance, protects back-end circuit with self short circuit.Filter circuit is ac filter circuit 22 mainly, and multiple harmonic, high-frequency noise and spiking in energy good absorption input civil power, reduce idle thermal loss, improve its job stability, fundamentally reduce the fluctuation degree of depth, weaken stroboscopic.Conversion circuit is formed primarily of reduction voltage circuit 23, regenerative circuit 24 and booster circuit 25.By reduction voltage circuit 23, the high pressure sine filtered is changed into low-voltage sine power supply, very pure being also convenient to of such power supply converts.Then that convert low-voltage sine wave to approximate ideal by regenerative circuit module 24, that edge is precipitous square wave.To convert finally by booster circuit 25, amplify close to desirable square wave, obtain the square wave of the approximate ideal being applicable to AC-LED work.
The stroboscopic phenomenon produced when the utility model is mainly applied on the lighting device such as bulb lamp, ceiling light for AC-LED is revised and is solved, and is convenient to promoting the use of of AC-LED.Consider, from the angle causing stroboscopic phenomenon, this programme proposes by transforming AC-LED powering mode, civil power filtered by the supply module after innovation and converts, use alternating current supply filter the multiple harmonic contained and noise contribution to be removed, generated the square-wave signal being more suitable for AC-LED electrical property simultaneously by conversion circuit.Eliminate multiple harmonic and noise contribution, more stable power supply can be obtained, and reduce the generation of the fluctuation degree of depth; Square wave makes AC-LED be constant amplitude in each positive/negative half period simultaneously, sends the brightness of relative constancy, fundamentally reduces the fluctuation degree of depth; And in each half period, metastable voltage has metastable temperature, so would not produce interference to auxiliary voltage, thus reduce the fluctuation degree of depth, eliminate stroboscopic.
The utility model proposes one is eliminated AC-LED chip stroboscopic phenomenon truly method from electric property.Producing a kind of volume little, be applicable to the electric power driving module of the lighting devices such as AC-LED bulb lamp, ceiling light, solving stroboscopic problem from causing the angle of the AC-LED fluctuation degree of depth and stroboscopic effect.The present utility model power module mainly comprises protective circuit, filtration module and conversion circuit, can generate pure, stable, more be applicable to the square wave of AC-LED photoelectric properties.Use new power module, AC-LED can obtain better illuminating effect and more stable environment for use, reduces stroboscopic phenomenon, improves useful life, and the marketization for AC-LED is promoted and played a driving role.
Claims (4)
1. eliminate a power-converting circuit for AC-LED chip stroboscopic, it is characterized in that being provided with protective circuit, alternating current supply filter and conversion circuit;
The input of described protective circuit is connected in parallel on mains electricity input end, the output of the input termination protective circuit of described alternating current supply filter, described conversion circuit is provided with reduction voltage circuit, regenerative circuit and booster circuit, the output of the input termination alternating current supply filter of reduction voltage circuit, the output of the input termination reduction voltage circuit of regenerative circuit, the output of the input termination regenerative circuit of booster circuit; The high-frequency noise that alternating current supply filter is used in filtering civil power disturbs and multiple harmonic, suppresses due to voltage spikes, eliminates interference emission; Reduction voltage circuit is used for the high pressure sinusoidal signal through filtering to be converted into low-voltage sinusoidal signal; Regenerative circuit is used for low-voltage sine wave signal to change into square-wave signal; Booster circuit is for amplifying square-wave signal.
2. a kind of power-converting circuit eliminating AC-LED chip stroboscopic as claimed in claim 1, is characterized in that described protective circuit adopts surge suppressor.
3. a kind of power-converting circuit eliminating AC-LED chip stroboscopic as claimed in claim 2, is characterized in that described surge suppressor adopts piezo-resistance or twin zener dioder.
4. a kind of power-converting circuit eliminating AC-LED chip stroboscopic as claimed in claim 1, it is characterized in that described alternating current supply filter is made up of high frequency filter and common mode inductance, high frequency filter is for absorbing the high-frequency noise interference of the short-and-medium wave band of coming in from power line conduction; Common mode inductance is made up of the inductor winding around same iron core both sides, equal turn numbers, for absorbing the humorous wave interference produced because of wave distortion in mains supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520804748.7U CN204968206U (en) | 2015-10-16 | 2015-10-16 | Eliminate stroboscopic power of AC -LED chip conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520804748.7U CN204968206U (en) | 2015-10-16 | 2015-10-16 | Eliminate stroboscopic power of AC -LED chip conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204968206U true CN204968206U (en) | 2016-01-13 |
Family
ID=55063238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520804748.7U Expired - Fee Related CN204968206U (en) | 2015-10-16 | 2015-10-16 | Eliminate stroboscopic power of AC -LED chip conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204968206U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111791590A (en) * | 2020-07-23 | 2020-10-20 | 武汉先同科技有限公司 | Frequency conversion separation algorithm for small character spray heads |
-
2015
- 2015-10-16 CN CN201520804748.7U patent/CN204968206U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111791590A (en) * | 2020-07-23 | 2020-10-20 | 武汉先同科技有限公司 | Frequency conversion separation algorithm for small character spray heads |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201813599U (en) | LED (Light-Emitting Diode) dimmer power | |
| JP2014509456A (en) | LED driving device and control method thereof | |
| CN102014557A (en) | LED dimming power supply | |
| CN204518177U (en) | A kind of LED drive power circuit | |
| CN204104169U (en) | A kind of high-power LED drive circuit | |
| CN203574886U (en) | High-power LED lamp drive power supply with high power factor | |
| CN204968206U (en) | Eliminate stroboscopic power of AC -LED chip conversion circuit | |
| CN203181303U (en) | Light modulator used for voltage drop dimming light fixture | |
| CN101873746B (en) | Constant current source driving circuit for medium and high power LED lamps | |
| CN201094166Y (en) | LED drive circuit | |
| CN102438376A (en) | LED (Light Emitting Diode) constant-current driving power circuit | |
| CN202425167U (en) | Light emitting diode (LED) driver | |
| CN203104911U (en) | High-power LED (light emitting diode) drive power supply | |
| CN202165873U (en) | No-drive LED lamp | |
| CN203387719U (en) | LED driver used for illumination | |
| CN104735837A (en) | LED street lamp power supply without power frequency ripples and with APFC function | |
| CN202435663U (en) | Non-isolated LED constant-current driving power source with high power factor | |
| CN203104850U (en) | Light emitting diode (LED) lamp drive power supply adopting pulse width modulation (PWM) dimming | |
| CN206759328U (en) | A kind of LED power | |
| CN206260106U (en) | A kind of twin-stage PFC dimming driving circuits | |
| CN205305162U (en) | High -efficient constant current voltage dropping power supply | |
| CN202931607U (en) | Pulse width modulation type LED (Light-Emitting Diode) lamp driving circuit with current protection capability | |
| CN204465332U (en) | A kind of LED converter topology circuit | |
| CN202263579U (en) | Line lamp device for diamond synthesis press | |
| CN104023428A (en) | Light modulator used for voltage drop dimming light fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20181016 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |