CN109561537A - A kind of no stroboscopic High Power Factor ACLED driving circuit - Google Patents
A kind of no stroboscopic High Power Factor ACLED driving circuit Download PDFInfo
- Publication number
- CN109561537A CN109561537A CN201710878462.7A CN201710878462A CN109561537A CN 109561537 A CN109561537 A CN 109561537A CN 201710878462 A CN201710878462 A CN 201710878462A CN 109561537 A CN109561537 A CN 109561537A
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- circuit
- led light
- led
- emitting diode
- capacitor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
Abstract
The invention discloses a kind of no stroboscopic High Power Factor ACLED driving circuits, including rectification circuit, IC circuit, capacitor charging discharge circuit, LED light string, the rectification circuit will directly input ac signal and be converted into pulsating direct current signal, and operating voltage is provided for IC circuit, the IC circuit includes that exchange directly inputs multi-stage constant current driving IC chip, capacitor charging electric discharge road includes circuit LED light emitting diode, capacitor C, resistance R, the LED light string includes LED Light-Emitting Diode and rectifier diode, the rectifier diode and LED string and capacitor, resistance series connection, conducting circuit is provided for LED, also every section of LED light emitting diode is kept apart within the period of LED shutdown and is not influenced each other.The present invention is by increasing charge-discharge circuit in ACLED driving circuit；Again by simple circuit connection and few device, thoroughly solves the stroboscopic problem of LED lamp in the case where not influencing entire circuit power factor.
Description
Technical field
The present invention relates to LED circuit technical field more particularly to a kind of no stroboscopic High Power Factor ACLED driving circuits.
Background technique
Light emitting diode (LED) solid light source has many advantages, such as luminous efficiency height, environmental protection, long-life, is known as the 5th generation
Lighting source.Since the high-efficient of LED lamp, energy-saving effect are good, LED lamp is gradually instead of white light, moreover, LED
Lamps and lanterns, which have begun, to move to maturity.
Theoretically, the service life of LED is at 100,000 hours or more, but during actually useful, since LED is using tradition
Switching Power Supply driving method is limited by the internal electrolytic capacitor low service life, and the service life of the whole lamp of LED is caused to be lower than mostly 10,000 hours,
The serious development for restricting LED product.
Currently in order to solving the bottleneck problem of this technology, many experts, scholar, enterprise start to research and develop the novel driving of LED
Technology, no electrolytic capacitor high-voltage linear constant current driving IC technology are rapidly developed, this actuation techniques power factor height, volume
Small, at low cost, high reliablity, service life match with LED light source；But in the case where the energy storage of not electrolytic capacitor, lamps and lanterns
The luminous stroboscopic for having 100HZ or so；Although naked eyes directly cannot be perceived out, in some special application fields,
The stroboscopic of lamps and lanterns will affect take pictures, illuminating effect etc..
In order to settle the matter once and for all, if directly asked in the electrolytic capacitor that rectification circuit back increases to solve stroboscopic
If topic, the power factor that will lead to entire circuit is reduced, and harmonic wave increases；The input electrical characteristic of entire lamps and lanterns is seriously affected,
It is not able to satisfy country to the standard requirements of lighting electric.
In conclusion there is also many shortcomings for the prior art, up for further improving.
Summary of the invention
It is an object of the invention to solve to problem of the existing technology, it is especially desirable to solve High Power Factor
There is stroboscopic in use in the LED lamp of ACLED driving circuit.
To achieve the above objectives, the present invention, which adopts the following technical scheme that, is achieved:
A kind of no stroboscopic High Power Factor ACLED driving circuit, including rectification circuit, IC circuit, capacitor charging discharge circuit,
LED light string.
Further, rectification circuit will directly input ac signal and be converted into pulsating direct current signal；It and is IC circuit
Operating voltage is provided.
Further, IC circuit includes that dedicated exchange directly inputs multi-stage constant current driving IC chip, and IC circuit can root
According to the threshold voltage of every section of LED light emitting diode, LED light emitting diode is respectively turned on and turned off；And conjunction is provided for every section of LED
Suitable constant current.
Further, LED light serializer circuit includes LED light-emitting diode and rectifier diode；Rectifier diode is directly gone here and there with LED
And the series connection of capacitor, resistance, conducting circuit is provided for LED, also every section of LED light emitting diode is isolated within the period of LED shutdown
It opens and does not influence each other.
Further, capacitor charging discharge circuit is made of LED light emitting diode, capacitor C, resistance R；When input
When voltage increases, after voltage reaches the threshold voltage of first segment LED light emitting diode, first segment LED LED circuit is opened
Begin to be connected；Within the period of first segment LED LEDs ON, input voltage by rectifier diode D to first segment LED simultaneously
The capacitor C of connection charges；With the raising of input voltage, when input voltage amplitude reaches preceding two sections of LED light-emitting diodes pipe threshold electricity
When the sum of pressure, high-voltage linear constant current driving IC can turn off the LED light emitting diode of first segment conducting；First segment LED is in parallel at this time
Capacitor C also stop charging, start to provide voltage to the first segment LED light emitting diode of shutdown, and start to discharge, until under
It is always first segment LED luminous two by capacitor C before one input voltage period first segment LED light emitting diode is connected again
Pole pipe provides energy, maintains the brightness of first segment LED light emitting diode.The charge and discharge circuit working principle of other three sections of LED and
First segment is identical；In the case where high-voltage linear constant current drives every section of LED light emitting diode of IC turn-on and turn-off, capacitor C
It can charge in time and provide enough energy to LED light emitting diode in parallel, maintain the energy of LED light emitting diode；And
And the working characteristics without influencing driving IC chip；Maintain higher input power factor.
Compared with prior art, the invention has the benefit that
1, no stroboscopic High Power Factor ACLED driving circuit of the invention in ACLED driving circuit by increasing charge and discharge electricity
Road；Simple circuit connection and few device, thoroughly solve LED light in the case where not influencing entire circuit power factor
The stroboscopic problem of tool.
2, the present invention utilizes this inherent feature of the fixation VF value of LED, increases capacitor charging electric discharge electricity on LED light source
Road closes period capacitor when driving circuit circuit and discharges to LED, protect when LED light source is begun to turn on to capacitor charging in parallel
It is constantly on luminous to demonstrate,prove LED light source.And simultaneously entire driving input circuit follows always the sinusoidal waveform of this input voltage
Turn-on and turn-off, input voltage waveform is synchronous with input current waveform, as shown in Fig. 2, guaranteeing relatively high power factor, therefore
In LED whole circuit for lamp design, not only met the technical requirements of power lamps and lanterns input High Power Factor, but make lamp luminescence without
LED lamp light quality has been completely secured in stroboscopic.
Detailed description of the invention
Fig. 1 is the structural block diagram of circuit of the invention.
Fig. 2 is the particular circuit configurations schematic diagram of one embodiment provided by the present invention.
Fig. 3 is LED matrix input voltage, the current waveform figure after Fig. 1 application.
In figure: rectification circuit 100, IC circuit 200, capacitor charging discharge circuit 300, LED light string 400.
Specific embodiment
Presently preferred embodiments of the present invention is elaborated in conjunction with attached drawing below, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent explicitly be defined to be made to protection scope of the present invention.
Referring to shown in Fig. 1 and Fig. 2, a kind of no stroboscopic High Power Factor ACLED driving circuit, including rectification circuit 1, IC are electric
Road 2, capacitor charging discharge circuit 3, LED light string 4, the rectification circuit 1 are connected to AC power source, will directly input exchange telecommunications
It number is converted into pulsating direct current signal, and provides operating voltage for IC circuit 2；The IC circuit 2 is connect with rectification circuit 1, institute
Stating IC circuit 2 includes that exchange directly inputs multi-stage constant current driving IC chip, and IC circuit can be according to every section of LED light emitting diode
Threshold voltage is respectively turned on and turns off LED light emitting diode, and provides suitable constant current for every section of LED；The capacitor
Charging and discharging road 3 is connect with IC circuit 2, and capacitor charging electric discharge road 3 includes circuit LED light emitting diode, capacitor C, resistance
R；The LED light string 4 is connect with capacitor charging electric discharge road 3, and the LED light string 4 includes two poles of LED Light-Emitting Diode and rectification
Pipe, the rectifier diode and LED string and capacitor, resistance series connection, provide conducting circuit for LED, also within the period of LED shutdown
Every section of LED light emitting diode is kept apart and is not influenced each other.
The working principle of the invention:
When input voltage increases, after voltage reaches the threshold voltage of first segment LED light emitting diode, first segment LED shines
Diode circuit is begun to turn on；Within the period of first segment LED LEDs ON, input voltage passes through rectifier diode D
To the capacitor C charging of first segment LED parallel connection；With the raising of input voltage, shine when input voltage amplitude reaches preceding two sections of LED
When the sum of diode threshold voltage, high-voltage linear constant current driving IC can turn off the LED light emitting diode of first segment conducting；At this time
The capacitor C of one section of LED parallel connection also stops charging, and starts to provide voltage to the first segment LED light emitting diode of shutdown, and start to put
Electricity is always first by capacitor C until next input voltage period first segment LED light emitting diode is connected again
Section LED light emitting diode provides electric energy, maintains the brightness of first segment LED light emitting diode；
The charge and discharge circuit working principle of other three sections of LED is identical with first segment；It is led in high-voltage linear constant current driving IC
In the case where leading to and turning off every section of LED light emitting diode, capacitor C can charge in time and mention to LED light emitting diode in parallel
For enough energy, the energy of LED light emitting diode is maintained；And without the working characteristics for influencing driving IC chip；It maintains
Higher input power factor.
Shown in sum up, the present invention utilizes this inherent feature of the fixation VF value of LED, increases capacitor charging on LED light source
Discharge circuit, when LED light source is begun to turn on to capacitor charging in parallel, when period capacitor is closed to LED in driving circuit circuit
Electric discharge guarantees that LED light source is constantly on and shines.And simultaneously entirely driving input circuit is following always this input voltage just
String waveform turn-on and turn-off, input voltage waveform is synchronous with input current waveform (as shown in Figure 2), guarantee relatively high power because
Number, therefore in the whole circuit for lamp design of LED, the technical requirements of power lamps and lanterns input High Power Factor were not only met, but also make lamp
Tool shines without stroboscopic, and LED lamp light quality has been completely secured.
The foregoing is merely better embodiment of the invention, protection scope of the present invention is not with above embodiment
Limit, as long as those of ordinary skill in the art's equivalent modification or variation made by disclosure according to the present invention, should all be included in power
In the protection scope recorded in sharp claim.
Claims (2)
1. a kind of no stroboscopic High Power Factor ACLED driving circuit characterized by comprising
Rectification circuit is connected to AC power source, will directly input ac signal and is converted into pulsating direct current signal；
IC circuit is connected to the rectification circuit, and the rectification circuit provides operating voltage for IC circuit, and the IC circuit includes
Exchange directly inputs multi-stage constant current driving IC chip；
Capacitor charging discharge circuit is connected to the IC circuit, and capacitor charging electric discharge road includes circuit LED light-emitting diodes
Pipe, capacitor C, resistance R；
LED light string, is connected to the capacitor charging discharge circuit, and the LED light string includes two poles of LED Light-Emitting Diode and rectification
Pipe, the rectifier diode and LED string and capacitor, resistance series connection, provide conducting circuit for LED, also within the period of LED shutdown
Every section of LED light emitting diode is kept apart and is not influenced each other.
2. a kind of no stroboscopic High Power Factor ACLED driving circuit according to claim 1, it is characterised in that: the electricity
Capacity charge discharge circuit is made of LED light emitting diode, capacitor C, resistance R；When input voltage increases, voltage reaches
After the threshold voltage of one section of LED light emitting diode, first segment LED LED circuit is begun to turn on；It shines in first segment LED
In the period of diode current flow, input voltage is charged by rectifier diode D to the capacitor C of first segment LED parallel connection；With input
The raising of voltage, when input voltage amplitude reaches the sum of preceding two sections of LED light emitting diode threshold voltage, high-voltage linear constant current is driven
Dynamic IC can turn off the LED light emitting diode of first segment conducting；The capacitor C of first segment LED parallel connection at this time also stops charging, start to
The first segment LED light emitting diode of shutdown provides voltage, and starts to discharge, until next input voltage period first segment
Before LED light emitting diode is connected again, electric energy is provided for first segment LED light emitting diode by capacitor C always, maintains first segment
The brightness of LED light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710878462.7A CN109561537A (en) | 2017-09-26 | 2017-09-26 | A kind of no stroboscopic High Power Factor ACLED driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710878462.7A CN109561537A (en) | 2017-09-26 | 2017-09-26 | A kind of no stroboscopic High Power Factor ACLED driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109561537A true CN109561537A (en) | 2019-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710878462.7A Pending CN109561537A (en) | 2017-09-26 | 2017-09-26 | A kind of no stroboscopic High Power Factor ACLED driving circuit |
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| CN (1) | CN109561537A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110475409A (en) * | 2019-09-12 | 2019-11-19 | 深圳市明微电子股份有限公司 | A kind of voltage-operated device |
| CN112020176A (en) * | 2019-05-29 | 2020-12-01 | 晶豪科技股份有限公司 | Driving circuit of light emitting diode |
-
2017
- 2017-09-26 CN CN201710878462.7A patent/CN109561537A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112020176A (en) * | 2019-05-29 | 2020-12-01 | 晶豪科技股份有限公司 | Driving circuit of light emitting diode |
| CN110475409A (en) * | 2019-09-12 | 2019-11-19 | 深圳市明微电子股份有限公司 | A kind of voltage-operated device |
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