CN205670862U - A kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven - Google Patents
A kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven Download PDFInfo
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- CN205670862U CN205670862U CN201620551787.5U CN201620551787U CN205670862U CN 205670862 U CN205670862 U CN 205670862U CN 201620551787 U CN201620551787 U CN 201620551787U CN 205670862 U CN205670862 U CN 205670862U
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- 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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- 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
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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Abstract
A kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven, directly drive controller [3], light sensor [4], intelligent dimming unit [5], energy buffer unit [6], LED unit [7] including input protected location [1], rectification unit [2], exchange.The controller size according to the instantaneous value of the pulsating volage after rectification is directly driven in exchange, drives the LED of difference group luminous.The ambient light illumination that light sensor detects is converted to digital signal by intelligent dimming unit, and judges it is currently normally to turn on light or preservation & testing on daytime is turned on light, and thereby determines whether to need to call dimming curve.Its advantage is to use exchange directly to drive controller, it is not necessary to jumbo filter capacitor, High Power Factor and efficiency are high, and caloric value is little, and reliability is high.There is energy buffer unit, overcome exchange and directly drive the scintillation of LED.The curve that energy follow procedure sets dims, and the beneficially degree of depth is energy-conservation.
Description
Technical field
The present invention relates to a kind of LED illumination lamp, the intelligent dimming LED energy-conserving road lamp of a kind of directly driven by AC,
Belong to electric lighting field of energy-saving technology.
Background technology
LED (light emitting diode) is a kind of new type light source, has that power consumption is little, brightness is high, volume is little, lightweight, the life-span is long
Etc. advantage.With LED have that visibility is good as the street lamp of light source, the advantage such as energy saving, reaction are fast, progressively replace electric filament lamp,
Halogen tungsten lamp, mercury lamp, sodium vapor lamp, Metal halogen lamp etc..But the LED street lamp of currently used electric main typically requires rectifying and wave-filtering, and filters
Needing the capacitor of larger capacity, volume is big, and the life-span is short, and the pulse current harmonic content that rectifying and wave-filtering is formed is big, fall
The low power factor of light fixture, have impact on the performance of LED lamp.
Additionally, the application of current great power LED, heat radiation and cost are the problems needing to solve, and raising efficiency is to reduce to send out
The effective way of heat.
Summary of the invention
It is an object of the invention to propose a kind of intelligent dimming LED energy-conserving road lamp exchanging and directly driving, it is not necessary to filter capacitor
And transformator, use high performance integrated circuit accurately to control LED current, effectively reduce harmonic content, improve efficiency and power
Factor, reduces caloric value and the volume of light fixture, and on the premise of meeting road illumination, according to energy-conservation curve joint with an automatic light meter
Energy.
The present invention is achieved in that a kind of intelligent dimming LED energy-conserving road lamp exchanging and directly driving, including: input protection is single
Controller [3], light sensor [4], intelligent dimming unit [5], energy snubber list are directly driven in unit [1], rectification unit [2], exchange
Unit [6], LED unit [7]；Wherein:
Input protected location ［ 1 ］: provide overcurrent or short-circuit protection for LED street lamp and absorb surge voltage, with rectification list
Unit ［ 2 ］ constitutes electrical connection；
Rectification unit ［ 2 ］: AC-input voltage is carried out all wave rectification, directly drives controller for exchange and LED provides unidirectional
Pulsating volage, directly drives controller [3] and constitutes electrical connection with rectification unit [2] and exchanging；
Controller ［ 3 ］ is directly driven in exchange: according to the size of the instantaneous value of the pulsating volage after rectification, drive the LED of difference group
Luminescence, constitutes with rectification unit [2], intelligent dimming unit [5] and energy buffer unit [6], LED luminescence unit [7] and electrically connects
Connect；
Light sensor [4]: be used for experiencing ambient light illumination, constitutes electrical connection with intelligent dimming unit [5]；
Intelligent dimming unit [5]: directly driving controller ［ 3 ］ and light sensor [4] composition electrical connection with exchanging, effect is
The ambient light illumination that light sensor [4] detects is converted to digital signal, and judges it is currently normally to turn on light or safeguard daytime
Detection is turned on light, and thereby determines whether to need to call dimming curve；If normally turning on light, then press input voltage instantaneous value size and
The dimming curve of program setting produces suitable PWM voltage signal, and the PWM directly driving controller ［ 3 ］ exporting change to exchange controls
Signal, directly drives controller ［ 3 ］ by exchange and controls the brightness flop of LED unit [7], it is achieved the light modulation of LED；If daytime is in order to tie up
Protect detection and turn on light, the most only directly drive, to exchange, the high level signal that controller ［ 3 ］ output is fixing.
Energy buffer unit [6]: the curent change of buffering LED, the brightness of smooth LED, with exchange directly drive controller ［ 3 ］ and
LED unit [7] constitutes electrical connection；
LED unit [7]: be made up of some LED, carries out being grouped control, often group LED luminous power to LED
Size by exchange directly drive controller ［ 3 ］ control, with exchange directly drive controller ［ 3 ］ and energy buffer unit [6] composition electrically connect
Connect.
Described LED unit is made up of m group LED, and m is positive integer, and often group LED contains the n bar branch road of parallel connection,
N is positive integer, and every branch road has k LED light emitting diode to be composed in series LED string, and k is positive integer, and often group LED is straight by exchanging
Drive controller ［ 3 ］ by the size of input voltage instantaneous value and the dimming curve of program setting driven for emitting lights in the way of PWM.
The present invention is to use said units unit construction to form according to above-mentioned design, and its operation principle is: the exchange of input
Voltage carries out all wave rectification after input protected location, and the pulsating volage after rectification directly drives controller to exchange and powers, by exchanging
Directly drive controller and accurately control the electric current of each LED string.The ambient light illumination that intelligent dimming unit detects according to light sensor is sentenced
Disconnected is currently normally to turn on light or preservation & testing on daytime is turned on light, and thereby determines whether to need to call dimming curve；If it is the most normally opened
Lamp, then the dimming curve of the size and program setting of pressing input voltage instantaneous value produces suitable PWM voltage signal, straight to exchange
Drive the pwm control signal of controller exporting change, directly drive controller by exchange and realize the light modulation of LED；If daytime is in order to safeguard
Detect and turn on light, the most only directly drive, to exchange, the high level signal that controller output is fixing, the most do not press curve light modulation.
Advantages of the present invention and effect:
(1) use exchange directly to drive controller, it is not necessary to jumbo filter capacitor, and outer member is few, thus cost is relatively
Low, reliability is high.
(2) exchange utilizing integrated circuit is directly driven controller and is accurately controlled the electric current of each lamp string, allows total current close to just
String waveform, can improve power factor and efficiency, and caloric value is little, and performance is good.
(3) there is energy buffer unit, overcome exchange and directly drive the scintillation of LED.
(4) energy automatic decision is normally turned on light and preservation & testing is turned on light, and the curve that energy follow procedure sets dims, favorably
Energy-conservation in the degree of depth.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the circuit block diagram of the present invention.
Fig. 2 is the main circuit schematic diagram directly driving controller based on exchange of embodiment.
Fig. 3 is light sensor and the intelligent dimming element circuit schematic diagram of embodiment.
Fig. 4 is a kind of dimming curve figure of embodiment.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is described in further detail, and specific embodiment described herein, only in order to explain the present invention, is not used to limit
Determine the present invention.
Refer to Fig. 1, a kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven, including: input protected location [1], rectification
It is mono-that unit [2], exchange directly drive controller [3], light sensor [4], intelligent dimming unit [5], energy buffer unit [6], LED
Unit [7].Input protected location ［ 1 ］ provides overcurrent or short-circuit protection for LED street lamp and absorbs surge voltage, with rectification unit
2 ］ electrical connection is constituted.AC-input voltage is carried out all wave rectification by rectification unit ［ 2 ］, directly drives controller for exchange and LED carries
For unidirectional pulsating volage, directly drive controller [3] with rectification unit [2] and exchange and constitute and be electrically connected.Controller ［ 3 ］ is directly driven in exchange
The size of the instantaneous value according to the pulsating volage after rectification, drives the LED of difference group luminous, with rectification unit [2], intelligent dimming
Unit [5] and energy buffer unit [6], LED luminescence unit [7] composition electrical connection.Light sensor [4] is used for experiencing environment
Illuminance, constitutes electrical connection with intelligent dimming unit [5].Intelligent dimming unit [5] directly drives controller ［ 3 ］ and photosensitive with exchanging
Sensor [4] constitutes electrical connection, and effect is that the ambient light illumination that light sensor [4] detects is converted to digital signal, and sentences
Disconnected is currently normally to turn on light or preservation & testing on daytime is turned on light, and thereby determines whether to need to call dimming curve；If it is the most normally opened
Lamp, then the dimming curve of the size and program setting of pressing input voltage instantaneous value produces suitable PWM voltage signal, straight to exchange
Drive the pwm control signal of controller ［ 3 ］ exporting change, directly drive controller ［ 3 ］ by exchange and control the brightness change of LED unit [7]
Change, it is achieved the light modulation of LED；If daytime turns on light for preservation & testing, the most only directly drive, to exchange, the height that controller ［ 3 ］ output is fixing
Level signal.Energy buffer unit [6] for buffering the curent change of LED, the brightness of smooth LED, with exchange directly drive controller
3 ］ and LED unit [7] constitute electrical connection.LED unit [7] directly drives controller ［ 3 ］ and energy buffer unit [6] structure with exchanging
Becoming electrical connection, be made up of m group LED, m is positive integer, and often group LED contains the n bar branch road of parallel connection, and n is positive integer,
Every branch road has k LED light emitting diode to be composed in series LED string, and k is positive integer, often group LED by exchange directly drive controller
3 ］ size of input voltage instantaneous value and dimming curve driven for emitting lights in the way of PWM of program setting are pressed.
Please referring further to Fig. 2, input protected location is made up of electric fuse F1 and varistor RV1；Rectification unit is by whole
Stream bridge BG1 serves as；Directly to drive controller by integrated circuit U1(model be FL77944 in exchange), electric capacity C1 and resistance R1, R2 form；
Energy buffer unit has 4 groups, and the 1st group of energy buffer unit includes that diode D11, electric capacity C11, resistance R11, the 2nd group of energy delay
Rush unit and include that diode D21, electric capacity C21, resistance R21, the 3rd group of energy buffer unit include diode D31, electric capacity C31, electricity
Resistance R31, the 4th group of energy buffer unit includes diode D41, electric capacity C41, resistance R41；LED unit is by 4 groups of ultra-high brightness LEDs
Luminescent device is constituted, and often group LED contains the n bar branch road of parallel connection, and n is positive integer, in the present embodiment, and the circuitry number of the 1st group of LED
N=5, the circuitry number n=4 of the 2nd group of LED, the circuitry number n=4 of the 3rd group of LED, the circuitry number n=3 of the 4th group of LED, every branch road
Having k LED light emitting diode to be composed in series LED string, k is positive integer, selects k=18 in the present embodiment.1st group of LED is by LED
Lamp string LED11～LED15 forms, and the 2nd group of LED is made up of LED string LED21～LED24, and the 3rd group of LED is by LED string LED31
～LED34 composition, the 4th group of LED is made up of LED string LED41～LED43.
The luminous power often organizing LED is determined by the electric current of this group each LED string, and its size is directly driven controller by exchange
U1 control the relating to parameters with each group of energy buffer unit, set the maximum electricity allowed by the resistance R2 that U1 the 10th pin is external
Flow valuve, by the size of current of voltage-regulation LED of U1 the 11st pin.
1st group of LED each lamp string (LED11～LED15) is in parallel, and the anode of the most each lamp string links together, each lamp
The negative electrode of string links together, and each LED string in parallel is in parallel with the electric capacity C11 of the 1st group of energy buffer unit, resistance R11 again,
The negative electrode of the diode D11 of lamp string anode and the positive pole of electric capacity C11 and the 1st group of energy buffer unit connects, the sun of diode D11
Pole is connected with the positive pole of rectifier bridge BG1；The negative electrode of the 1st group of LED each lamp string and the negative pole of capacitor C11 directly drive controller with exchanging
The anode of the diode D21 of the LED1 pin of U1 and the 2nd group of energy buffer unit is connected.
2nd group of LED each lamp string (LED21～LED24) is in parallel, and the anode of the most each lamp string links together, each lamp
The negative electrode of string links together, and each LED string in parallel is in parallel with the electric capacity C21 of the 2nd group of energy buffer unit, resistance R21 again,
The negative electrode of the diode D21 of lamp string anode and the positive pole of electric capacity C21 and the 2nd group of energy buffer unit connects, the sun of diode D21
Pole is connected with the negative electrode of the 1st group of LED each lamp string and the negative pole of capacitor C11；The negative electrode of the 2nd group of LED each lamp string and capacitor C21
The anode of negative pole and the diode D31 exchanging the LED2 pin directly driving controller U1 and the 3rd group of energy buffer unit be connected.
3rd group of LED each lamp string (LED31～LED34) is in parallel, and the anode of the most each lamp string links together, each lamp
The negative electrode of string links together, and each LED string in parallel is in parallel with the electric capacity C31 of the 3rd group of energy buffer unit, resistance R31 again,
The negative electrode of the diode D31 of lamp string anode and the positive pole of electric capacity C31 and the 3rd group of energy buffer unit connects, the sun of diode D31
Pole is connected with the negative electrode of the 2nd group of LED each lamp string and the negative pole of capacitor C21；The negative electrode of the 3rd group of LED each lamp string and capacitor C31
The anode of negative pole and the diode D41 exchanging the LED3 pin directly driving controller U1 and the 4th group of energy buffer unit be connected.
4th group of LED each lamp string (LED41～LED43) is in parallel, and the anode of the most each lamp string links together, each lamp
The negative electrode of string links together, and each LED string in parallel is in parallel with the electric capacity C41 of the 4th group of energy buffer unit, resistance R41 again,
The negative electrode of the diode D41 of lamp string anode and the positive pole of electric capacity C41 and the 4th group of energy buffer unit connects, the sun of diode D41
Pole is connected with the negative electrode of the 3rd group of LED each lamp string and the negative pole of capacitor C31；The negative electrode of the 4th group of LED each lamp string and capacitor C41
Negative pole with exchange directly drive controller U1 LED4 pin be connected.
Exchange is directly driven the 1st pin of controller U1 and is concatenated resistance R1 and is connected to the positive pole of rectifier bridge BG1, U1 the 9th,
14,16 pins link the negative pole (GND) of rectifier bridge BG1, and the 10th pin of U1 is connected to the 15th pin of GND, U1 through resistance R2
(VDD) be connected electric capacity C1 between GND.
The effect of each group energy buffer unit is by energy absorption part during LED high brightness, waits that control is directly driven in exchange
The energy that when device internal drive metal-oxide-semiconductor processed turns off, release is absorbed, thus the brightness that smooth LED is instantaneous, greatly
Reduce the flicker degree of LED.Be described as follows as a example by the 1st group of energy buffer unit: when exchange directly drive controller U1 LED1～
LED4 pin (the i.e. the 3rd, 5,7,12 pins) when having one of them to turn under the driving of internal pwm signal, just have electric current to pass through
Diode D11, charges to electric capacity C11, when the voltage on C11 rises to the minimum of the 1st group of LED each lamp string (LED11～LED15)
During luminous voltage, having begun to electric current and flow into and start luminescence in LED string, electric capacity C11 is charged by one part of current subsequently, and one
It is luminous that branch's electric current flows into LED string, and along with the charging of electric capacity C11, the voltage of electric capacity C11 constantly rises, until by two poles
It is luminous that the electric current almost all of pipe D11 flows into the 1st group of LED string, and the voltage of electric capacity C11 just keeps constant, the voltage of electric capacity C11
The highest, stored energy is the most；When LED1～the LED4 pin that controller U1 is directly driven in exchange is all off, just there is no electric current
By diode D11, at this moment electric capacity C11 starts, to the 1st group of LED each lamp string (LED11～LED15) electric discharge, to maintain lamp string luminous,
Until exchange directly drive LED1～the LED4 pin of controller U1 upper once have one of them to turn on time, just have electric current to pass through two poles
Electric capacity C11 is charged by pipe D11, so circulates.Resistance R11 is to provide discharge paths to electric capacity C11, due to resistance R11's
Resistance is relatively big, and the electric current flow through is the least, has little influence on normal discharge and recharge and the luminescence of LED string of C11, but works as alternating current power supply
When turn-off time is longer, resistance R11 makes the voltage on electric capacity C11 be unlikely to remain long.Other group energy buffer unit
Operation principle is similar.So, under the effect of energy buffer unit, the shortcoming exchanging straight crystal drive circuit can be prevented effectively from, make
Pedestrian does not observes the high frequency flicker phenomenon of LED signal lamp substantially, improves visual experience.
Controller U1(model: FL77944 is directly driven in exchange) it is the direct LED driver of a exchange, there are 4 integrated forms inside
High-voltage LED constant-current source, it is provided that phase-cut dimming, has wider dimming scope, steady high photocontrol and good dimmer compatible
Property, realize high efficiency by High Power Factor and low THD, there is overheat protector and simulation, digital dimming function, outside employing
Minimal number of RC passive element, is particularly well-suited to high efficiency LED illumination System.
The electric current of LED unit passes through current sense resistor R2Arrange as follows:
,,,
Wherein ILED1、ILED2、ILED3、ILED4It is respectively exchange and directly drives LED1, LED2, LED3, LED4 pin of controller U1
(the i.e. the 3rd, 5,7,12 pins) fill electric current regulation target current value.
When parameter designing, according to virtual value and the input power of prediction of input voltage, can be as at the beginning of equation below
Step determines the value of current sense resistor R2:
In formula: VAC.RMSFor the virtual value of input voltage, PINInput power for prediction.
Refer to Fig. 3, intelligent dimming unit is 78L05 by integrated circuit U2(model), electric capacity C2～C5, single-chip microcomputer U3
(model is STC15W408AS) and socket CZ1 form.Wherein U2 is 5V integrated regulator, it is provided that the running voltage of single-chip microcomputer
And electric current.STC15W408AS single-chip microcomputer is 1T 8051 single-chip microcomputer, and during same operating frequency, speed is the 8～12 of tradition 8051
Times, be Width funtion, at a high speed, highly reliable, low-power consumption, superpower jamproof 8051 single-chip microcomputers of new generation, the internal Flash containing 8K
Program storage and 512 bytes SRAM, be internally integrated high-precision RC clock, is not required to external crystal-controlled oscillation and external reset circuit,
Also have comparator, 5 timer/counters and 3 road CCP/PWM/PCA, 8 road 10-bit high speed A/D converters, 1 group of ultrahigh speed different
The hardware resources such as step serial communication port, the capture/comparing unit (CCP/PWM/PCA) within utilization produces pwm signal, thus controls
In drawing 2, the 11st pin (DIM) of U1 dims.Light sensor is served as by light sensitive diode GM, and light sensitive diode produces
Photoelectric current by resistance R3 time, on resistance R3 produce voltage drop, this voltage by single-chip microcomputer U3 the 15th pin connect
Internal ADC0 is converted to digital signal, as ambient light illumination measured value.Socket CZ1 is for downloading to single-chip microcomputer, single giving
When sheet machine downloads, disconnecting communication power supply, rs 232 serial interface signal and+5V power supply with Transistor-Transistor Logic level are powered.
Single-chip microcomputer judges it is currently normally to turn on light or preservation & testing on daytime is turned on light, the most really according to ambient light illumination measured value
Fixed the need of calling dimming curve；If normally turning on light, then press the size of input voltage instantaneous value and the light modulation of program setting
Curve produces suitable PWM voltage signal, directly drives the pwm control signal of controller exporting change to exchange, is directly driven by exchange
Controller realizes the light modulation of LED；If daytime turns on light for preservation & testing, the most only directly drive, to exchange, the height that controller output is fixing
Level signal, does not the most press curve light modulation.
In conjunction with Fig. 2, Fig. 3, referring further to Fig. 4, the key point parameter of dimming curve is stored in the memorizer of single-chip microcomputer.
After street lamp input adds civil power, when normally turning on light, under the control of Single Chip Microcomputer (SCM) program, the pwm signal that single-chip microcomputer U3 produces
The brightness controlling LED is B1, and maintains moment in late into the night t1；Hereafter pedestrian and road vehicle can gradually reduce, single-chip microcomputer
U3 gradually reduces the dutycycle of pwm signal, and the now brightness of LED also gradually reduces, until moment t2, the luminance-reduction of LED arrives
B2；Hereafter, the dutycycle of the pwm signal of single-chip microcomputer U3 output keeps constant, and the brightness of LED is also maintained at B2；To moment t3(i.e.
Dawn) time, single-chip microcomputer detects that ambient light illumination is stepped up, and single-chip microcomputer U3 steps up the dutycycle of pwm signal, and LED's is bright
Degree steps up the most therewith, until moment t4, the luminance recovery of LED to B1；Hereafter, accounting for of the pwm signal that single-chip microcomputer U3 exports
Empty more constant than keeping, the brightness of LED is also maintained at B1, until turning off the light.So, when the quiet wagon flow of pedestrian is few at dead of night, single-chip microcomputer journey
Sequence adjusts the dutycycle of pwm signal automatically by the dimming curve set, and slowly reduces or improves LED luminance, both having avoided brightness
Sudden change, again can be energy-conservation with the degree of depth, reduce energy loss further.
Claims (6)
1. one kind exchanges the intelligent dimming LED energy-conserving road lamp directly driven, it is characterised in that including: input protected location [1], rectification
It is mono-that unit [2], exchange directly drive controller [3], light sensor [4], intelligent dimming unit [5], energy buffer unit [6], LED
Unit [7]；Wherein:
Input protected location ［ 1 ］: provide overcurrent or short-circuit protection for LED street lamp and absorb surge voltage, with rectification unit ［ 2 ］
Constitute electrical connection；
Rectification unit ［ 2 ］: AC-input voltage is carried out all wave rectification, directly drives controller for exchange and LED provides unidirectional pulsation
Voltage, directly drives controller [3] and constitutes electrical connection with rectification unit [2] and exchanging；
Controller ［ 3 ］ is directly driven in exchange: according to the size of the instantaneous value of the pulsating volage after rectification, drives the LED of difference group luminous,
Electrical connection is constituted with rectification unit [2], intelligent dimming unit [5] and energy buffer unit [6], LED luminescence unit [7]；
Light sensor [4]: be used for experiencing ambient light illumination, constitutes electrical connection with intelligent dimming unit [5]；
Intelligent dimming unit [5]: directly driving controller ［ 3 ］ and light sensor [4] composition electrical connection with exchanging, effect is by light
The ambient light illumination that dependent sensor [4] detects is converted to digital signal, and judges it is currently normally to turn on light or preservation & testing on daytime
Turn on light, thereby determine whether to need to call dimming curve；If normally turning on light, then press size and the program of input voltage instantaneous value
The dimming curve set produces suitable PWM voltage signal, directly drives the pwm control signal of controller ［ 3 ］ exporting change to exchange,
Directly drive controller ［ 3 ］ by exchange and control the brightness flop of LED unit [7], it is achieved the light modulation of LED；If daytime is in order to safeguard inspection
Survey and turn on light, the most only directly drive, to exchange, the high level signal that controller ［ 3 ］ output is fixing；
Energy buffer unit [6]: the curent change of buffering LED, the brightness of smooth LED, directly drive controller ［ 3 ］ and LED with exchanging
Unit [7] constitutes electrical connection；
LED unit [7]: be made up of some LED, carries out being grouped control to LED, and often group LED luminous power is big
Little directly driven controller ［ 3 ］ by exchange and control, directly drive controller ［ 3 ］ and energy buffer unit [6] and constitute with exchange and be electrically connected.
The most according to claim 1 a kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven, it is characterised in that described
Energy buffer unit has 4 groups；LED unit is made up of 4 groups of ultra-high brightness LED luminescent devices, and the n bar that often group LED contains parallel connection props up
Road, n is positive integer, and every branch road has k LED light emitting diode to be composed in series LED string, and k is positive integer, and often group LED is by handing over
Stream directly drive controller ［ 3 ］ by the size of input voltage instantaneous value and the dimming curve of program setting driven for emitting lights in the way of PWM.
The most according to claim 1 a kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven, it is characterised in that described
The 1st group of LED each lamp string (LED11～LED15) of LED unit is in parallel, and the anode of the most each lamp string links together, each lamp string
Negative electrode link together, each LED string in parallel is in parallel with the electric capacity C11 of the 1st group of energy buffer unit, resistance R11 again, lamp
The negative electrode of the diode D11 of string anode and the positive pole of electric capacity C11 and the 1st group of energy buffer unit connects, the anode of diode D11
It is connected with the positive pole of rectifier bridge BG1；The negative electrode of the 1st group of LED each lamp string and the negative pole of capacitor C11 directly drive controller U1 with exchanging
LED1 pin and the 2nd group of energy buffer unit diode D21 anode be connected.
The most according to claim 1 a kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven, it is characterised in that described
The 2nd group of LED each lamp string (LED21～LED24) of LED unit is in parallel, and the anode of the most each lamp string links together, each lamp string
Negative electrode link together, each LED string in parallel is in parallel with the electric capacity C21 of the 2nd group of energy buffer unit, resistance R21 again, lamp
The negative electrode of the diode D21 of string anode and the positive pole of electric capacity C21 and the 2nd group of energy buffer unit connects, the anode of diode D21
It is connected with the negative electrode of the 1st group of LED each lamp string and the negative pole of capacitor C11；The negative electrode of the 2nd group of LED each lamp string and capacitor C21's
Negative pole is connected with the anode of the diode D31 exchanging the LED2 pin directly driving controller U1 and the 3rd group of energy buffer unit.
The most according to claim 1 a kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven, it is characterised in that described
The 3rd group of LED each lamp string (LED31～LED34) of LED unit is in parallel, and the anode of the most each lamp string links together, each lamp string
Negative electrode link together, each LED string in parallel is in parallel with the electric capacity C31 of the 3rd group of energy buffer unit, resistance R31 again, lamp
The negative electrode of the diode D31 of string anode and the positive pole of electric capacity C31 and the 3rd group of energy buffer unit connects, the anode of diode D31
It is connected with the negative electrode of the 2nd group of LED each lamp string and the negative pole of capacitor C21；The negative electrode of the 3rd group of LED each lamp string and capacitor C31's
Negative pole is connected with the anode of the diode D41 exchanging the LED3 pin directly driving controller U1 and the 4th group of energy buffer unit.
The most according to claim 1 a kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven, it is characterised in that described
The 4th group of LED each lamp string (LED41～LED43) of LED unit is in parallel, and the anode of the most each lamp string links together, each lamp string
Negative electrode link together, each LED string in parallel is in parallel with the electric capacity C41 of the 4th group of energy buffer unit, resistance R41 again, lamp
The negative electrode of the diode D41 of string anode and the positive pole of electric capacity C41 and the 4th group of energy buffer unit connects, the anode of diode D41
It is connected with the negative electrode of the 3rd group of LED each lamp string and the negative pole of capacitor C31；The negative electrode of the 4th group of LED each lamp string and capacitor C41's
Negative pole is connected with exchanging the LED4 pin directly driving controller U1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620551787.5U CN205670862U (en) | 2016-06-10 | 2016-06-10 | A kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven |
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| CN201620551787.5U CN205670862U (en) | 2016-06-10 | 2016-06-10 | A kind of exchange the intelligent dimming LED energy-conserving road lamp directly driven |
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| CN205670862U true CN205670862U (en) | 2016-11-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105873304A (en) * | 2016-06-10 | 2016-08-17 | 南京交通职业技术学院 | Alternating current direct driving intelligent dimming LED (light emitting diode) energy saving street lamp |
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2016
- 2016-06-10 CN CN201620551787.5U patent/CN205670862U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105873304A (en) * | 2016-06-10 | 2016-08-17 | 南京交通职业技术学院 | Alternating current direct driving intelligent dimming LED (light emitting diode) energy saving street lamp |
| CN105873304B (en) * | 2016-06-10 | 2018-06-26 | 南京交通职业技术学院 | It is a kind of to exchange the intelligent dimming LED energy-conserving road lamps directly driven |
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