CN103298188A - Non-capacitance and non-inductance LED driving method - Google Patents
Non-capacitance and non-inductance LED driving method Download PDFInfo
- Publication number
- CN103298188A CN103298188A CN 201210051799 CN201210051799A CN103298188A CN 103298188 A CN103298188 A CN 103298188A CN 201210051799 CN201210051799 CN 201210051799 CN 201210051799 A CN201210051799 A CN 201210051799A CN 103298188 A CN103298188 A CN 103298188A
- Authority
- CN
- China
- Prior art keywords
- led
- control unit
- voltage
- driving method
- group
- 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.)
- Pending
Links
Images
Abstract
A non-capacitance and non-inductance LED driving method is applied to the LED driving of the alternating current electric supply. The non-capacitance and non-inductance LED driving method comprises a rectifying unit, a constant current control unit, an MCU, a multi-path electronic switch control unit and a plurality of LED sets of driving. The rectifying unit rectifies the voltage of the alternating current electric supply into the direct current pulse voltage. After sampling a direct current pulse voltage value and periodical synchronous signals periodically, the MCU controls different switches to be connected with the corresponding LED sets through the multi-path electronic switch control unit according to the different voltage and the time sequence, a parallel drive LED set is adopted when the direct current pulse voltage is low, and different LED set tandem drives are adopted when the voltage is high. Therefore, the purposes of obtaining a high power factor, high power supply using efficiency, long service life, low electromagnetism radiation, a small size and low cost are achieved.
Description
Technical field
The present invention relates to led driver and LED driving method, particularly do not have the noninductive LED driving method of electric capacity,
Background technology
Advantages such as that the LED light-emitting diode has is energy-conservation, longevity have been widely used, the particularly application of lighting field, but also generally adopt traditional switching power circuit to drive in the middle of the existing application, wherein used elements such as electrochemical capacitor, inductance in a large number.And the useful life of electrochemical capacitor is very limited, and differ greatly several ten thousand hours the useful life of the measured electrochemical capacitor ability of matter several thousand hours and LED.The use of inductance is easy to generate electromagnetic radiation, other electrical equipment is produced disturb.Adding that the big cost height of these two kinds of device volumes makes the miniaturization of light fixture and reduces cost makes troubles.The use of these two kinds of elements has influenced useful life, performance and the cost of whole LED light fixture greatly.
Summary of the invention
Technical problem to be solved by this invention provides a kind of LED driving method without electric capacity and inductance, solves short, the defectives such as volume is big, cost is high, electromagnetic radiation in useful life of prior art.Because single power of existing LED is little, general use all is to adopt hundreds of thousands of LED connection in series-parallel to use, and existing integrated optical source also is the integrated of many lamp pearls, and this is directly brought possibility with high drive with many series connection.
In order to achieve the above object, the technical solution adopted for the present invention to solve the technical problems is: the LED lamp was ganged up the monolithic procedure control unit and was directly driven with the electric main after the rectification, did not use inductance and capacitor element.This method comprises a plurality of LED groups of rectification unit, constant current unit, monolithic procedure control unit, multi-channel electronic switch unit, driving, isolating diode.Rectification unit becomes dc pulse moving voltage with the ac commercial power voltage rectification; Monolithic procedure control unit periodically take a sample dc pulse moving voltage value and cycle synchronisation signal, and judgement power supply AC characteristic, be 50Hz or 60Hz, power supply voltage level 110V or 220V or other magnitude of voltage, organize through the different corresponding LED of switch connection of variable connector control unit control with sequential by different voltage according to different power supply AC characteristics, when hanging down as 110V, AC initial phase, end phase place and dc pulse moving voltage adopt driving LED group in parallel, adopt different serial number driving LED groups when voltage is high, satisfy high voltage drive without the method for inductance.Be added with the constant current assembly in the driving loop on each road, the electric current that flows through LED when making LED lamp string be in the voltage of different amplitudes is constant, satisfies the original intention without electric capacity.
Beneficial effect of the present invention is: obtain high power factor, high power supply service efficiency, long useful life, low electromagnetic radiation, little driving power volume, low manufacturing cost.
Below in conjunction with embodiment and accompanying drawing the present invention is illustrated, but not as restriction of the present invention.
Description of drawings
Fig. 1 constant current unit CCI is connected in the positive power source terminal block diagram.
Fig. 2 constant current unit CCI is connected in the negative power end block diagram.
Voltage waveform sequential chart during Figure 32 20V AC input after the rectification.
Input current waveform during Figure 42 20V AC input.
LED power output waveform during Figure 52 20V AC input.
Voltage waveform sequential chart during Figure 61 10V AC input after the rectification.
Input current waveform during Figure 71 10V AC input.
LED power output waveform during Figure 81 10V AC input.
S* electronic switch upper end waveform during Fig. 9 PWM control power output.
Figure 108 LED assembly drives block diagram.
The D1 rectifier.
MCU monolithic procedure control unit.
CCI constant current control unit.
The module that many LED lamps of DX* pearl is formed (* is the device sequence number, down together).
S* electronic switch parts.
The D* isolating diode.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is illustrated:
The whole drive circuit that focuses on of this method is not used electric capacity and inductance.As Fig. 1 and Fig. 2, this invention is by rectifier bridge heap D1, monolithic procedure control unit MCU, electronic switch S1-S5, constant-current controller CCI, and isolating diode D2 and organizes the LED fabric more and becomes.The LED group is to become a group with many LED lamp pearl serial connections, has the LED group to conspire to create a finished product lamp string like this with a plurality of, directly receives on the power supply of rectification by different control requirements with many electronic switches.The lamp pearl number of each group is standard with the direct driving that can satisfy AC voltage.22 lamps of a group for example, with 4 groups, totally 88 lamp pearls, every lamp pearl 3.2V, driving voltage 281.6V controls through constant current and can directly be connected on AC220V, on the power supply of DC peak value 310V.
Its implementation method is: rectifier bridge heap D1 carries out rectification to the interchange of input, produce dc pulse moving voltage, the dc pulse moving voltage that the input rectifying of monolithic procedure control unit MCU produces and frequency are measured and are judged, and catch synchronizing signal O point such as Fig. 3, MCU monolithic procedure control unit is just connected electronic switch S1 when capturing the O point, S3, S5, DX11, DX21 is along with the rising of voltage begins to light, MCU monolithic procedure control unit begins to clock and determine a point according to frequency and the electric pressure of power supply simultaneously, electrical voltage point when just 1 lamp group reaches maximum current adds the magnitude of voltage of 1 lamp group operate as normal, MCU monolithic procedure control unit is just connected electronic switch S1 when arriving a point, S2, S4, disconnect S3, S5, DX11, DX21, DX12, DX22 lights; MCU monolithic procedure control unit clocks and determines the b point according to frequency and the electric pressure of power supply simultaneously, electrical voltage point when just 2 lamp groups reach maximum current adds the magnitude of voltage of 1 lamp group operate as normal, if supply power voltage is 110VAC, just do not arrive b point such as Fig. 6, determine a ' point and directly enter, if the 220VAC power supply just can arrive the b point, MCU monolithic procedure control unit is just connected electronic switch S5 when arriving the b point, disconnect S1, S2, S3, S4, DX11, DX12, DX21, light, MCU monolithic procedure control unit clocks and determines the c point according to frequency and the electric pressure of power supply simultaneously, electrical voltage point when just 3 lamp groups reach maximum current adds the magnitude of voltage of 1 lamp group operate as normal, MCU just connects electronic switch S2 when arriving the c point, disconnect S1, S5, S3, S4, DX11, DX12, DX21, DX22 lights, MCU monolithic procedure control unit clocks and determines c ' point according to frequency and the electric pressure of power supply simultaneously, MCU monolithic procedure control unit is just connected electronic switch S5 when arriving c ' point, disconnect S1, S2, S3, S4, DX11, DX12, DX21 lights, MCU monolithic procedure control unit clocks and determines b ' point according to frequency and the electric pressure of power supply simultaneously, MCU just connects electronic switch S1 when arriving b ' point, S2, S4, disconnect S5, S3, DX11, DX12, DX21, DX22 lights, MCU clocks and determines a ' point according to frequency and the electric pressure of power supply, MCU just connects electronic switch S1 when arriving a ' point, S3, S5, disconnect S2, S4, DX11, DX21 lights, MCU monolithic procedure control unit clocks and determines o ' point according to frequency and the electric pressure of power supply simultaneously, and MCU goes round and begins again and restarts new circulation when arriving o ' point.At the decline stage of dc pulse moving voltage a, a ', b, b ', the magnitude of voltage of c, c ' is corresponding.
Between c to c ', between a to a ', MCU monolithic procedure control unit can drive the power output that electronic switch S* starts PWM pattern control output LED according to the height of input voltage during the 110VAC power supply during 220VAC power supply.When changing, certain limit remains unchanged at input voltage to reach gross output, as shown in Figure 9 waveform.
In above control procedure, as long as input voltage is higher than the voltage of the driving of LED, the electric current that constant-current controller CCI controls driving LED all the time is that set point is constant, i.e. constant current drives, and reaches the target that does not have electric capacity also can produce level and smooth drive current.
Current waveform when Fig. 4 imports for 220VAC, a to b and b ' are to a ' section when low-voltage is imported, and the LED string is 2 tunnel states in parallel, the total current height, the deficiency of power output when having compensated low input is as the power output waveform of Fig. 5 when 220VAC imports.
Input current waveform when Fig. 7 imports for 110VAC, gamut waveform under the effect of constant-current controller CCI is level and smooth, the power output waveform when Fig. 8 imports for 110VAC.
In order to obtain more precise current control and higher power-efficient, the quantity of LED group can adopt 6 groups 8 groups or more group, and with the control of more electronic switch, as shown be 8 groups of LED and implement illustration, D3, the D4 isolating diode for adding, DX31, DX32, DX41, the DX42 lamp group for adding, S6, S7, S8, S9, S10, the S11 electronic switch for adding, its control step is by the above corresponding increase of order; Certainly adds after the lamp group increases, each organizes the LED lamp pearl number of going here and there will corresponding minimizing, to satisfy the driving needs when the maximum input voltage.
More than there is not the noninductive LED driving method of electric capacity, Rectified alternating current after the employing rectification is through the programmed algorithm control of MCU cyclelog, direct driving LED string, removed short electrochemical capacitor and the easy inductance that produces electromagnetic radiation in useful life, the driver life-span of restriction LED lamp life is prolonged, more be embodied in the longevity of LED light fixture; Low electromagnetic radiation has reduced the interference to other electrical equipment, easily satisfies the requirement of EMC; Flat permanent input current obtains high power factor; Owing to do not have electric capacity and inductance and EMC circuit, the volume of driver is little, and little driver volume energy and LED light fixture are perfect to be integrated; The circuit of simplifying makes product cost lower; High power supply service efficiency is energy savings more.
What should be understood that is: above-described embodiment is just to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the essence method scope of the present invention all fall within protection scope of the present invention.
Claims (5)
1. there is not the noninductive LED driving method of electric capacity, the LED that is applied to electric main drives, and the LED driving method of this no electric capacity, inductance comprises rectification unit, constant current control unit, MCU procedure control unit, multi-channel electronic switch control unit, drives a plurality of LED groups.After the dc pulse moving voltage value and cycle synchronisation signal after the MCU procedure control unit periodic sample rectification, organize through the different corresponding LED of switch connection of variable connector control unit control with sequential by different voltage, when dc pulse moving voltage is low, adopt driving LED group in parallel, adopt different LED group tandem drives when voltage is high.
2. the noninductive LED driving method of no electric capacity as claimed in claim 1 is characterized in that being connected in each paths of LEDs current circuit constant current control unit or a multi-way shared constant current unit, and the constant current control unit can place positive power source terminal or negative power end.
3. the noninductive LED driving method of no electric capacity as claimed in claim 1, it is characterized in that whole drive part does not have electric capacity and inductance, the different LED lamp group in position directly is connected to main power source plus or minus end with different electronic switches by the control requirement respectively in whole lamp string.
4. the noninductive LED driving method of no electric capacity as claimed in claim 3 is characterized in that electronic switch can be the device of transistor, field effect transistor or other energy control switch.
5. the noninductive LED driving method of no electric capacity as claimed in claim 1, it is characterized in that plurality of LEDs lamp pearl constitutes a group, a plurality of lamp group serial connections constitute a controlled body, in the middle of the switch series that lamp group and power supply are just connecting, be connected to isolating diode, each group all is connected with electronic switch, the quantity of lamp group can be 2 groups, 4 groups, 6 groups, 8 groups, group or more arbitrarily, and controls with the electronic switch of respective numbers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210051799 CN103298188A (en) | 2012-03-01 | 2012-03-01 | Non-capacitance and non-inductance LED driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210051799 CN103298188A (en) | 2012-03-01 | 2012-03-01 | Non-capacitance and non-inductance LED driving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103298188A true CN103298188A (en) | 2013-09-11 |
Family
ID=49098302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210051799 Pending CN103298188A (en) | 2012-03-01 | 2012-03-01 | Non-capacitance and non-inductance LED driving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103298188A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103619111A (en) * | 2013-12-09 | 2014-03-05 | 上海亚明照明有限公司 | Alternating-current LED (Light-Emitting Diode) drive circuit |
| WO2016078252A1 (en) * | 2014-11-21 | 2016-05-26 | 南京大学 | High performance current-type multi-switch led controller |
| CN107046747A (en) * | 2016-02-06 | 2017-08-15 | 陕西亚成微电子股份有限公司 | A kind of LED adjusting control circuit |
-
2012
- 2012-03-01 CN CN 201210051799 patent/CN103298188A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103619111A (en) * | 2013-12-09 | 2014-03-05 | 上海亚明照明有限公司 | Alternating-current LED (Light-Emitting Diode) drive circuit |
| WO2015085881A1 (en) * | 2013-12-09 | 2015-06-18 | 上海亚明照明有限公司 | Alternating-current led drive circuit |
| US10588188B2 (en) | 2013-12-09 | 2020-03-10 | Shanghai Yaming Lighting Co., Ltd. | Alternating-current LED drive circuit |
| WO2016078252A1 (en) * | 2014-11-21 | 2016-05-26 | 南京大学 | High performance current-type multi-switch led controller |
| CN107046747A (en) * | 2016-02-06 | 2017-08-15 | 陕西亚成微电子股份有限公司 | A kind of LED adjusting control circuit |
| CN107046747B (en) * | 2016-02-06 | 2019-08-20 | 陕西亚成微电子股份有限公司 | A kind of LED light adjusting control circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104427688B (en) | LED alternating-current drive circuit | |
| CN101827481B (en) | Alternating-current power supply LED light source drive circuit with segmented conversion input | |
| CN102752940A (en) | High-efficiency LED (light-emitting diode) drive circuit and drive method thereof | |
| CN102625522A (en) | High Brightness Led Driving Circuit | |
| CN102045928A (en) | LED (light-emitting diode) lamp power supply capable of dimming | |
| CN102711319B (en) | LED (light emitting diode) light source subregion subsection transformation input driving control method and control circuit thereof | |
| CN203523098U (en) | LED strip single loop circuit with control and flashing LED lamp strip | |
| CN104009621A (en) | Device for improving power efficiency for power factor corrections | |
| CN103843461B (en) | For the drive circuit of Solid-state light bulb assembly | |
| CN101527983B (en) | White-light LED illumination driving circuit on basis of current-type charge pump | |
| CN103889111A (en) | Linear constant-current driving circuit capable of running under two kinds of voltage and driving method thereof | |
| CN203225926U (en) | LED lamp having self-adaptive drive circuit and self-adaptive drive circuit | |
| CN103152914B (en) | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module | |
| CN202603016U (en) | Driving circuit of LED (light-emitting diode) fluorescent lamp with adjustable light | |
| CN201550315U (en) | LED driving circuit | |
| CN103298188A (en) | Non-capacitance and non-inductance LED driving method | |
| CN101754538B (en) | Adjustable photocontrol circuit of LED (light-emitting diode) lamp | |
| CN201937905U (en) | Light emitting diode (LED) lamp dimmable power supply | |
| CN102791063A (en) | Intelligent LED module with function of automatic voltage regulation | |
| CN102802304A (en) | Novel low-cost multi-group constant current output circuit of LED (Light Emitting Diode) lighting power supply | |
| CN102858068B (en) | Parallel-switch-controlled variable load LED (light-emitting diode) driving circuit | |
| CN202551455U (en) | LED (Light-Emitting Diode) constant-current driving power supply | |
| CN205124073U (en) | Utilize switch to realize circuit and lamps and lanterns of adjusting luminance | |
| CN204652709U (en) | The linear LED drive power of dividing potential drop rectification falls in non-polar condenser | |
| CN202841636U (en) | Equal duty cycle light-emitting diode (LED) pulsation driving power circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Shi Ruixin Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice |
Addressee: Shi Ruixin Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130911 |