CN102297373A - Outdoor illuminating device - Google Patents
Outdoor illuminating device Download PDFInfo
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- CN102297373A CN102297373A CN2011102200367A CN201110220036A CN102297373A CN 102297373 A CN102297373 A CN 102297373A CN 2011102200367 A CN2011102200367 A CN 2011102200367A CN 201110220036 A CN201110220036 A CN 201110220036A CN 102297373 A CN102297373 A CN 102297373A
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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
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- 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
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Abstract
The invention provides an outdoor illuminating device, which comprises a light source driving circuit board and a light source plate, wherein the light source driving circuit board is provided with a light source driving circuit; the light source plate is provided with a light-emitting diode light source electrically connected with the light source driving circuit; the light-emitting diode light source comprises a plurality of light-emitting diodes; and the light-emitting diodes comprise light-emitting diodes with small emission angles. The outdoor illuminating device has a simple structure, low micro-current power consumption, no heat generation, and strong interference resistance capability to a power supply, and has the advantages of anti-explosion function, long service life, no repair, good universality, low cost, no influence on the health of eyes in long-term illumination, and the like; main performance parameters accord with the requirements of relevant national standards; furthermore, the produced light-emitting diodes with the small emission angles can be used in an illuminating system; the production cost is decreased greatly; and the light-emitting diodes with the small emission angles are not necessary to be abandoned.
Description
Technical field
The present invention relates to lighting field, more particularly, the present invention relates to a kind of outdoor illumination.
Background technology
LED source is the light source that comprises one or more light emitting diodes (LED), because characteristics such as the luminous efficiency height of light emitting diode, life-span length make LED source get most of the attention as lighting device of future generation.By the parameters of the light emitting diode selecting to comprise in the LED source and the quantity of light emitting diode, brightness and the different LED source of power that can realize having dealing with various requirements.For example, LED source can be as lamp affixed to the ceiling, desk lamp, the long tube lamp of room lighting and the various lighting devices such as street lamp that are used as outdoor lighting.
In the technology of existing manufacturing light emitting diode, because influence such as various factors such as aging, the error of workman's operation of manufacturing equipment, the change of process conditions, raw-material variations, the various parameters that cause the light emitting diode that manufacturing comes out, for example, light firing angle, luminous intensity, rated power (such as nominal drive circuit and nominal drive voltage) etc. all are not quite similar.Therefore, when adopting light emitting diode to make LED source, need strict screening parameters to meet the light emitting diode of certain standard.For example, need the light emitting diode that the selective light firing angle is big and luminous intensity is consistent.And those light firing angles are little and/or the inconsistent light emitting diode of luminous intensity will be regarded as " substandard products " and be dropped.
Because light emitting diode has the characteristic of DC driven, so when the alternating voltage of civil power commonly used drives LED source with production with in living, alternating voltage need be converted to the rectifier circuit of DC voltage.Yet when alternating voltage was unstable, for example, in peak of power consumption periods such as night or red-letter days, the frequency of the alternating voltage of civil power may not can be stabilized in specified 50Hz or 60Hz, and may occur such as 90Hz or higher instantaneous frequency; Simultaneously, the level of the alternating voltage of civil power also may change in the scope such as 90V～290V.In the prior art, only alternating voltage is converted to DC voltage to drive LED source by rectifier circuit, so can't solve of the influence of the above-mentioned instability of the frequency of alternating voltage and voltage for LED source, cause brightness variation, flicker, the cisco unity malfunction of LED source even cause LED source to damage, therefore reduced the reliability of LED source, greatly shortened life-span of light emitting diode.
Fig. 1 illustrates as the alternating voltage of civil power and is driven the oscillogram of the driving DC voltage of LED source by the light source driving circuit according to prior art being used to of producing.In the prior art, because only adopted rectifier circuit to carry out the AC-DC conversion, so when the alternating voltage of input had (having peak value is Vpeak's) sinusoidal waveform shown in curve C ac, resultant DC voltage had the waveform of (having peak value the is Vpeak's) variation shown in curve C dc.Therefore, when the DC voltage with the variation waveform shown in curve C dc drove light emitting diode, light emitting diode was not operated in its best duty.And, be lower than this luminous operating voltage (for example, equal 0V, in the time of as shown in fig. 1), light emitting diode does not have luminous so work as DC voltage because light emitting diode need could luminous when the voltage that applies is higher than certain luminous operating voltage.Therefore, adopt DC voltage to drive light emitting diode and can cause light emitting diode between luminous and not luminous, to switch (flicker) continually with the waveform shown in curve C dc, thus the life-span of having reduced light emitting diode.Simultaneously, be lower than at DC voltage during the time period of luminous operating voltage, the electric energy major part that is applied to light emitting diode is converted to heat energy, thereby cause capacity usage ratio to reduce, and then cause luminous efficiency to reduce, the heat of not expecting that light emitting diode also produces therefore the time and reduce its life-span is accelerated aging.In addition, under the driving of the DC voltage of the waveform with the variation shown in curve C dc, light emitting diode is with the frequency scintillation of 1/T, thereby greatly influenced the personnel's that work under such lighting environment eyesight.
Because in the LED source of prior art, will directly be provided to light emitting diode, so need carry out strict selection for parameter that is included in the diode in the LED source (such as rated voltage, rated current etc.) and quantity etc. from the DC voltage of rectifier circuit output as driving voltage.Therefore, the light emitting diode that does not meet top requirement will be regarded as substandard products and be dropped.In addition, if some light emitting diode is because of long-play deterioration or damage in LED source, then need the driving voltage that is provided to light emitting diode is regulated, and the light source driving circuit according to prior art that only adopts rectifier bridge to drive light emitting diode can't be realized the adjusting for the driving voltage that is provided to light emitting diode.
Summary of the invention
In order to overcome the technical problem of top some or all, exemplary embodiment provides a kind of outdoor illumination, its circuit is simple, technology path is novel, principle is correct, design innovation, components and parts are selected standard, little electric current power consumption is low, not hot, strong to the power supply antijamming capability, have that longevity is excused from a college course, versatility is good, cost is low, long-time illumination does not influence advantages such as eye health, Specifeca tion speeification meets the requirement of concerned countries standard.
According to exemplary embodiment, a kind of outdoor illumination is provided, this outdoor illumination comprises: the light source driving circuit plate, the light source driving circuit plate is provided with light source driving circuit; Light source board is equipped with the LED source that is electrically connected to described light source driving circuit on light source board, this LED source comprises a plurality of light emitting diodes, and described a plurality of light emitting diodes comprise that the light firing angle is less than 40 ° light emitting diode.
Being included in the vertical direction that a plurality of light emitting diodes in the LED source are installed to be with respect to light source board tilts, to form first area and second area on the light source board between the body at each light emitting diode, wherein, the distance in the first area between the body of light emitting diode is less than the distance in second area between the body of light emitting diode.
Be included in a plurality of light emitting diodes in the LED source and be installed to be tilt 0 ° to 5 ° angle of vertical direction with respect to light source board.
Described light source driving circuit comprises rectifier circuit, voltage regulator circuit and light emitting diode drive source circuit, wherein, rectifier circuit is connected to external power source, to be provided to voltage regulator circuit through first output of rectification with positive terminal by rectifier circuit, voltage regulator circuit is regulated the voltage of first output, be lower than second output of the voltage of first output with formation voltage, the light emitting diode drive source circuit receives second output and regulates second output from voltage regulator circuit, have with generation specific period voltage the 3rd output and the 3rd output is provided to the positive terminal of LED source, wherein, described specific period is less than the cycle of the voltage of first output.
The voltage waveform of described the 3rd output is zig-zag, square waveform, triangular waveform or sinusoidal waveform.
The valley point voltage value of the 3rd output is greater than zero, and the crest voltage value of the 3rd output is less than the crest voltage value of first output.
The valley point voltage value of the 3rd output is more than or equal to the luminous operational voltage value of LED source.
Described light source driving circuit also comprises current regulating circuit, and this current regulating circuit is connected between the negative pole end of the negative pole end of LED source and rectifier circuit, is adjusted to predetermined value with the electric current that will flow in LED source.
Described light source driving circuit also comprises protection and improves circuit; this protection and improve circuit and be connected between external power source and the rectifier circuit, and be provided to being connected in series in the inductor between external power source and the rectifier circuit and filtering the capacitor that is connected in parallel with rectifier circuit that is provided to high frequency clutter the output of rectifier circuit from external power source and form of high frequency clutter the output of rectifier circuit by alleviating from external power source.
Described light source driving circuit comprises rectifier circuit, voltage regulator circuit and current regulating circuit filter condenser, voltage regulation resistance device and current-limiting resistor, wherein, the input of rectifier circuit is connected to external power source, the positive terminal of rectifier circuit is connected to first end of current regulating circuit current-limiting resistor, the negative pole end of rectifier circuit is connected to the negative pole end of LED source, first end of voltage regulator circuit filter condenser is connected to the positive terminal of rectifier circuit and first end of current regulating circuit current-limiting resistor, second end of voltage regulator circuit filter condenser is connected to the negative pole end of LED source, voltage regulator circuit carries out filtering to the output from the positive terminal of rectifier circuit, and adjusting is from the voltage of the output of the positive terminal of rectifier circuit, first end of voltage regulation resistance device is connected to the positive terminal of rectifier circuit and first end of current-limiting resistor, second end of voltage regulation resistance device is connected to the negative pole end of LED source, second end of current regulating circuit current-limiting resistor is connected to the positive terminal of LED source, wherein, rectifier circuit, voltage regulator circuit and current regulating circuit filter condenser, voltage regulation resistance device and current-limiting resistor can be at-2040 ℃ or are lower than under-2040 ℃ the environment temperature and work.
Described outdoor illumination can be used for the device of outdoor lighting for street lamp, Projecting Lamp etc., especially the street lamp that can work under cold conditions.
According to exemplary embodiment, the colour temperature of this outdoor illumination can be adjusted to colour temperature near 9 left and right sides sunlight in morning, the optical attenuation index must satisfy maximum and be no more than 5% requirement, voltage indexes can be in normal ranges, and voltage stepping (bag) precision height takes off limit value in principle, the electric current index is stepping (bag) not, parameter is relaxed, and promptly selective light parameter area current error is big, can bright scope in current value wide.
Light emitting diode is in setting the light elevation range, its arrangement has the characteristics of " simultaneously, many rings, not isogonism " (promptly printed circuit platen surface, multi-layer annular layout, each light emitting diode are installed not isogonism), satisfy the designing requirement of light distribution, light efficiency and the natural heat dissipation etc. of cold light source, guaranteed the key indexs such as light decay, life-span and reliability of product.
In outdoor illumination according to exemplary embodiment, determine the number of light emitting diode by the performance number of expectation, the light emitting diode that to determine number again is divided into some groups, with series connection in every group with every group between the hybrid mode that combines in parallel make up, and corresponding power supply forms between every group fully independently pattern and finishes integrated light source, to guarantee the designing requirement of light source nargin.
Be connected to external power source according to the outdoor illumination of exemplary embodiment such as civil power, 220V, 50Hz alternating current are through above-mentioned light source driving circuit optimization, rectification, adjusting, output be equivalent to light emitting diode group operating voltage and the pressure drop of light source regulating circuit and direct current export, make the normal luminous work of semiconductor cold light source (that is LED source).During deenergization, each circuit in the light source driving circuit forms effective repid discharge loop automatically, and the semiconductor cold light source is extinguished rapidly, bleeds off electric charge in the circuit simultaneously rapidly.
According to the outdoor illumination luminous efficiency height of exemplary embodiment, have light source nargin, anti-power supply interference performance is strong.Its power consumption is very little simultaneously, and caloric value keeps the low temperature of lamp constant, and can realize that long-term illumination does not affect one's power of vision far below known LED source.
According to exemplary embodiment, LED source can be the semiconductor cold light source.Adopted semiconductor cold light source regulating circuit in the outdoor illumination, the light emitting diode group obtains optimum operating voltage under the satisfied externally primary power source normal power supply condition, and it is very big (under the state of 100V～300V) in voltage pulsation, also can stablize provides power supply, makes the light emitting diode cold light source be able to work.To a shaped article, this circuit need not adjusted after solidifying.
In outdoor illumination according to exemplary embodiment, can consider at the same time that the basis of the light firing angle of each light emitting diode comes up to arrange light emitting diode on light source board, thereby mix from the light of each light emitting diode emission of outdoor illumination, to obtain the even brightness illumination light.Therefore; in outdoor illumination according to exemplary embodiment; do not need to abandon little smooth firing angle light emitting diode; make the overwhelming majority even the whole light emitting diodes produced all can be utilized; thereby greatly reduced production cost; and exempted recovery technology substantially to the light emitting diode that abandons, can the light emitting diode of fundamentally protecting environment to be not dropped and/the recovery technology of the light emitting diode that abandons is polluted.
Description of drawings
Fig. 1 illustrates as the alternating voltage of civil power and is driven the oscillogram of the driving DC voltage of LED source by the light source driving circuit according to prior art being used to of producing;
Fig. 2 is the schematic block diagram that illustrates according to the light source driving circuit of exemplary embodiment;
Fig. 3 is the oscillogram of driving voltage that is used to drive LED source that illustrates according to exemplary embodiment;
Fig. 4 is the circuit diagram that illustrates according to the light source driving circuit of another exemplary embodiment;
Fig. 5 is the schematic diagram that illustrates according to the outdoor illumination of exemplary embodiment;
Fig. 6 is the schematic cross sectional views that illustrates according to the light source board in the outdoor illumination of exemplary embodiment.
The specific embodiment
Below by the outdoor illumination that specifically describes in conjunction with the accompanying drawings according to exemplary embodiment.
Fig. 2 is the schematic block diagram that illustrates according to the light source driving circuit of exemplary embodiment.As shown in Figure 2, the light source driving circuit according to exemplary embodiment comprises rectifier circuit 1, voltage regulator circuit 2 and light emitting diode drive source circuit 3.
The input of rectifier circuit 1 is connected to external power source.External power source is that 50Hz or 60Hz, rated voltage are civil power or other AC powers of 110V or 220V for rated frequency for example.Rectifier circuit 1 will be converted to DC voltage from the alternating voltage that external power source provides.Rectifier circuit 1 will be provided to voltage regulator circuit 2 through first output of rectification by its positive terminal.Rectifier circuit 1 can be the bridge circuit of routine.In one example, can withstand voltage be higher by selecting, operating current has the commutation diode of 20 times of left and right sides surpluses to realize rectifier circuit 1.
As shown in Figure 2, the light source driving circuit according to exemplary embodiment can also comprise special protection and improve circuit 5.Protect and improve circuit 5 and be connected between external power source and the rectifier circuit 1.The protection and improve circuit 5 and for example form by filter inductor and capacitor.Under these circumstances, the inductor of high impedance is connected in series between external power source and the rectifier circuit 1, be provided to high frequency clutter the output of rectifier circuit 1 to alleviate from external power source, low-impedance capacitor and rectifier circuit 1 are connected in parallel, and are provided to high frequency clutter the output of rectifier circuit 1 to filter from external power source.The common high-frequency impulse energy that absorbs as the AC network of external power source of the inductor of high impedance and low-impedance capacitor; thereby effectively protect the whole light source drive circuit; improved the EMC performance (i.e. measurement system resists the Electro Magnetic Compatibility that other electromagnetic radiation sources disturb) of integrated light source, can effectively reduce EMI (the electromagnetic interference (EMI) emissions total amount of sending during equipment work) simultaneously and disturb and sensitiveness.Therefore, protect and improve circuit 5 to have guaranteed to be provided to the magnitude of voltage of alternating voltage of rectifier circuit 1 and the stability of frequency, and then guarantee to be provided to the stability of the driving voltage of LED source.Therefore, can prevent the above-mentioned defective that exists in the prior art such as brightness variation, flicker, cisco unity malfunction or damage of the LED source that causes because of instantaneous high pressure and high frequency, the reliability and the life-span of having improved LED source.
As shown in Figure 2, voltage regulator circuit 2 is connected between rectifier circuit 1 and the light emitting diode drive source circuit 3.Voltage regulator circuit 2 is regulated the voltage of first output, is lower than second output of the voltage of first output with formation voltage, and it is provided to light emitting diode drive source circuit 3.Usually, the selected of voltage difference between the driving voltage of (that is first output) voltage of the secondary power supply after the rectification and load (that is LED source) is very important.Bigger voltage difference is very disadvantageous for powerful LED source, can cause the reduction of whole light source drive circuit efficient, thermal losses and power consumption to increase, and is also high to the requirement of power supply stability.Yet, for the low power LED light source, under the situation of the output current of the secondary power supply after the rectification being controlled (for example, the output current of the secondary power supply after the rectification being controlled at below the 50mA), so bigger voltage difference will help the whole light source drive circuit.This is because can not need during light source driving circuit to adopt relevant transistor to feed back the Current Control point etc. that method such as special-purpose adjuster circuit is adjusted electric current or set led array in design, can directly control electric current with resistance.Therefore, can realize light source driving circuit more simply, reliably according to exemplary embodiment.In a preferred exemplary embodiment, second output that voltage regulator circuit 2 will have than the voltage of the low about 20V of voltage～about 40V of first output is provided to the light emitting diode drive source circuit.
As shown in Figure 2, light emitting diode drive source circuit 3 is connected between voltage regulator circuit 2 and the LED source 4.Light emitting diode drive source circuit 3 receives second output and regulates second output from voltage regulator circuit 2, have with generation specific period voltage the 3rd output and it is provided to the positive terminal of LED source 4.For example, the cycle of the voltage of the 3rd output can be less than the cycle of first voltage of exporting.Under these circumstances, light emitting diode drive source circuit 3 can comprise known frequency adjustment circuit.Light emitting diode drive source circuit 3 can also further be regulated second output, to obtain being suitable for driving the 3rd output of LED source.For example, light emitting diode drive source circuit 3 can be regulated second output, to obtain having the 3rd output of suitable maximum (peak value) magnitude of voltage Vtop and/or minimum (valley) magnitude of voltage Vbottom.Under these circumstances, light emitting diode drive source circuit 3 can also comprise the known voltage regulating circuit.Will be described in greater detail below light emitting diode drive source circuit 3.
According to an exemplary embodiment, first output of rectifier circuit 1 is regulated through voltage regulator circuit 2 and light emitting diode drive source circuit 3, thereby be met current value, the suitable load of magnitude of voltage (promptly, the 3rd output of needs LED source 4) makes LED source 4 obtain the good power supply supply in the certain voltage scope.The 3rd output after light emitting diode drive source circuit 3 is further optimized parameter is provided to LED source 4.According to an exemplary embodiment, can adopt known integrated circuit modules to realize light emitting diode drive source circuit 3.Under these circumstances, can select the other integrated circuit that free footnote will is arranged of high pressure pin specially, thereby suitable creep age distance is provided.
In one example, LED source 4 comprises a plurality of light emitting diode groups that are connected in parallel, and each light emitting diode group comprises a plurality of light emitting diodes that are connected in series.LED source 4 can be the semiconductor cold light source.
Fig. 3 illustrates the alternating voltage waveform Cac that provides from external circuit and according to the schematic diagram of voltage waveform of the 3rd output that is used to drive LED source of exemplary embodiment.
As shown in Figure 3, the alternating voltage waveform Cac that provides from external circuit has cycle 2T, so the cycle of voltage waveform through first output of rectification of rectifier circuit 1 is T (referring to Fig. 1).The cycle t of the voltage waveform of the 3rd output of light emitting diode drive source circuit 3 can be much smaller than the period T of the voltage waveform of the cycle 2T of alternating voltage waveform Cac and first output.For this reason, light emitting diode drive source circuit 3 can comprise known frequency adjustment circuit.Therefore; under the driving of the 3rd such output; LED source 4 is the frequency 1/t that changes of luminosity that the variation of the magnitude of voltage of t occurs much larger than the frequency 1/2T of alternating voltage (for example according to the cycle; 50Hz or 60Hz), therefore can protect the eyesight of the user under the illumination of the LED source 4 that is in such driving.
As shown in Figure 3, the voltage waveform that is provided to the 3rd output of LED source 4 can be triangular wave (shown in curve C dc1), square wave (shown in curve C dc2), sinusoidal wave (shown in curve C dc3) or sawtooth waveforms (shown in curve C dc4 and Cdc5).For this reason, light emitting diode drive source circuit 3 can comprise known waveform shaping circuit, so that the 3rd output that is provided to light emitting diode drive source circuit 3 from voltage regulator circuit 2 has an above-mentioned voltage waveform.
As shown in Figure 3, the valley point voltage value of the 3rd output is greater than zero, and the crest voltage value of the 3rd output is less than the crest voltage value Vpeak of first output.For example, the valley point voltage value of the 3rd output can be more than or equal to the luminous operating voltage of LED source 4.For this reason, light emitting diode drive source circuit 3 can be regulated second output of voltage regulator circuit 2, to obtain three output of valley point voltage value Vbottom more than or equal to predetermined threshold value Vth.Described threshold value Vth can be the luminous operating voltage of LED source 4, and for example, threshold value Vth is the minimum voltage that guarantees that LED source 4 is luminous.Therefore, light emitting diode in the LED source 4 is luminous continuously under the driving of the 3rd such output, thereby can prevent aforesaid because of the discontinuous luminous various shortcomings that cause of light emitting diode, prolong the life-span of light emitting diode, improve capacity usage ratio, improve luminous efficiency, reduce the heat that light emitting diode produced.
In addition, the adjusting because of voltage regulator circuit 2 makes second magnitude of voltage of exporting that is provided to light emitting diode drive source circuit 3 less than first magnitude of voltage of exporting.Correspondingly, from light emitting diode drive source circuit 3 be provided to LED source 4 the 3rd output crest voltage value Vtop can less than provide from rectifier circuit 1 first output crest voltage value Vpeak.Therefore, in current exemplary embodiment, the scope Vtop～Vbottom of magnitude of voltage of the 3rd output that is provided to LED source 4 is much smaller than the scope Vpeak～0V (referring to Fig. 1) according to the magnitude of voltage of the driving voltage of prior art.So; the magnitude of voltage because of the 3rd output of the LED source 4 that drives by such the 3rd output in scope Vtop～Vbottom, change the change of luminous intensity that causes can much smaller than according to the LED source of prior art because of driving voltage value changes the change of luminous intensity that causes in scope Vpeak～0V, thereby vision protection more effectively.
Above-described voltage regulator circuit 2 and light emitting diode drive source circuit 3 are two independent circuit, yet, exemplary embodiment is not limited thereto, and in some instances, voltage regulator circuit 2 can be integrated in the circuit with light emitting diode drive source circuit 3.
As shown in Figure 2, the light source driving circuit according to exemplary embodiment can also comprise current regulating circuit 6.Current regulating circuit 6 is connected between the negative pole end of the negative pole end of LED source 4 and rectifier circuit 1, is adjusted to predetermined value with the electric current that will flow in LED source 4.Current regulating circuit 6 can play a part the quantitative of output voltage and/or electric current and/or can regulate continuously, to satisfy the requirement of different lighting apparatus.For example, current regulating circuit 6 can comprise variable resistance, thereby, be adjusted to different values with the electric current that will output to the negative pole end of rectifier circuit 1 from the negative pole end of LED source 4 by can be continuously or the stepping ground resistance value of regulating this variable resistance.Therefore, can realize continuously or the brightness of LED source 4 is regulated on stepping ground.In another example, current regulating circuit 6 can be resaistance-capacity coupling circuit, wherein, current regulating circuit 6 can comprise low-impedance capacitor (smmothing capacitor), for carrying out filtering, make LED source 4 obtain more level and smooth, stable voltage with further at the issuable high-voltage pulse of LED source 4 duration of works.
On the other hand, when LED source 4 works long hours, the characteristic of the element in element in the light emitting diode drive source circuit 3 and/or the LED source 4 may deterioration or is damaged, and therefore causes the brightness of LED source 4 that the change of not expecting takes place.Current regulating circuit 6 can compensate such brightness and change, thereby guarantees that luminosity is constant, has improved light source driving circuit and the reliability of the LED source that drives by this light source driving circuit.Comprise at current regulating circuit 6 under the situation of variable condenser and/or variable resistance, the capacitance that can be by the manual adjustments variable condenser and/or the resistance value of variable resistance are controlled the voltage that is provided to LED source 4 or are flow through the electric current of LED source 4, thereby guarantee that luminosity is not changed.
In addition, as shown in Figure 2, described light source driving circuit can also comprise the filter regulator circuit 7 that is connected in parallel with LED source 4, is provided to the driving voltage of LED source with further optimization, improves to drive reliability.Filter regulator circuit 7 plays further reduction EMI (the electromagnetic interference (EMI) emissions total amount of sending during equipment work) and disturbs and sensitiveness, improves the power supply performance of light source driving circuit to the voltage stabilizing of LED source 4.At this moment, filter regulator circuit can be eliminated may be in the driving voltage residual harmful clutter that exchanges that produces when working with light emitting diode.In Fig. 2, filter circuit 7 is exemplarily illustrated as and comprises capacitor, yet exemplary embodiment is not limited thereto, and can adopt known various filter regulator circuits to realize filter regulator circuit 7.In addition, in order to guarantee and improve the response speed of light source, the value of the capacitor in the filter regulator circuit 7 has been carried out suitable adjustment, it is very fast to make that light source switches on and off speed.
Obtain optimum operating voltage according to light emitting diode under the satisfied externally primary power source normal power supply condition of the light source driving circuit of exemplary embodiment, and it is very big (under the state of 100V～300V) in voltage pulsation, also can provide power supply, make LED source be able to work.To a shaped article, this circuit parameter need not adjusted after solidifying.
Fig. 4 is the circuit diagram that illustrates according to the light source driving circuit of another exemplary embodiment.
As shown in Figure 4, light source driving circuit comprises rectifier circuit 1, voltage regulator circuit 2 ', protects and improves circuit 5 ' and/or current regulating circuit 6 '.
The input of rectifier circuit 1 is connected to external power source, and the positive terminal of rectifier circuit 1 is connected to first end of current regulating circuit 6 ', and the negative pole end of rectifier circuit 1 is connected to the negative pole end of LED source 4.External power source is that 50Hz or 60Hz, rated voltage are civil power or other AC powers of 110V or 220V for rated frequency for example.Rectifier circuit 1 will be converted to DC voltage from the alternating voltage that external power source provides.Rectifier circuit 1 can be the bridge circuit of routine.In one example, can withstand voltage be higher by selecting, operating current has the commutation diode of 20 times of left and right sides surpluses to realize rectifier circuit 1.
First end of voltage regulator circuit 2 ' (for example, can be called as input) can be connected to the positive terminal of rectifier circuit 1 and first end of current regulating circuit 6 ', second end of voltage regulator circuit 2 ' (for example, can be called as output) can be connected to the negative pole end of rectifier circuit 1 and the negative pole end of LED source 4.Voltage regulator circuit 2 ' can carry out filtering to the output from the positive terminal of rectifier circuit 1, and/or can regulate the voltage from the output of the positive terminal of rectifier circuit 1.For this reason, voltage regulator circuit 2 ' can comprise filter condenser (not shown) and voltage regulation resistance device (not shown).First end of filter condenser is connected to the positive terminal of rectifier circuit 1 and first end of current regulating circuit 6 ', and second end of filter condenser is connected to the negative pole end of LED source 4.Filter condenser can carry out filtering to the output from the positive terminal of rectifier circuit 1.First end of voltage regulation resistance device is connected to the positive terminal of rectifier circuit 1 and first end of current regulating circuit 6 ', and second end of voltage regulation resistance device is connected to the negative pole end of LED source 4.The voltage regulation resistance device can be regulated the voltage from the output of the positive terminal of rectifier circuit 1.
First end of current regulating circuit 6 ' (for example, can be called as input) can be connected to the positive terminal of rectifier circuit 1, and second end of current regulating circuit 6 ' (for example, can be called as output) can be connected to the positive terminal of LED source 4.Current regulating circuit 6 ' can be regulated the electric current from the output of the positive terminal of rectifier circuit 1.For this reason, current regulating circuit 6 ' can comprise the current-limiting resistor (not shown).First end of current-limiting resistor is connected to the positive terminal of rectifier circuit 1, and second end of current-limiting resistor is connected to the positive terminal of LED source 4.Current-limiting resistor can be regulated the electric current from the output of the positive terminal of rectifier circuit 1.
In addition, can also comprise the protection between the input that is connected external power source and rectifier circuit 1 and improve circuit 5 ' according to the light source driving circuit of current exemplary embodiment, as shown in Figure 4.For example, protect and improve circuit 5 ' and can comprise capacitor (not shown) and resistor (not shown).Resistor in series is connected between external power source and the rectifier circuit 1, to regulate the voltage that is provided to the output of rectifier circuit 1 from external power source.Capacitor is connected in series between external power source and the rectifier circuit 1, is provided to high frequency clutter the output of rectifier circuit 1 to filter from external power source.Therefore; effectively protect the whole light source drive circuit; improved the EMC performance (i.e. measurement system resists the Electro Magnetic Compatibility that other electromagnetic radiation sources disturb) of integrated light source, can effectively reduce EMI (the electromagnetic interference (EMI) emissions total amount of sending during equipment work) simultaneously and disturb and sensitiveness.In addition, the protection of describing with reference to Fig. 2 above also can using and improve circuit 5 and replace protection and improve circuit 5 '.
Be connected the protection between the input of external power source and rectifier circuit 1 and improve circuit 5 ' (or protection and improve circuit 5) and guaranteed to be provided to the magnitude of voltage of alternating voltage of rectifier circuit 1 and the stability of frequency, and then guarantee to be provided to the stability of the driving voltage of LED source.Therefore, can prevent the above-mentioned defective that exists in the prior art such as brightness variation, flicker, cisco unity malfunction or damage of the LED source that causes because of instantaneous high pressure and high frequency, the reliability and the life-span of having improved LED source.
In the above in the exemplary embodiment of describing with reference to Fig. 2, voltage regulator circuit 2, light emitting diode drive source circuit 3, protect and improve in circuit 5 and the current regulating circuit 6 at least one comprise can in, the semiconductor integrated circuit of normal operation under the temperature conditions of low latitudes.Therefore, light source driving circuit as shown in Figure 2 and the outdoor illumination that comprises this light source driving circuit go for such as in, the temperature of low latitudes, heat condition, for example, can as in being suitable for, the street lamp that uses of low latitudes.Yet, because the characteristic of ordinary semiconductor integrated circuit, for example, comprising the characteristic of semiconductor transistor, caused the ordinary semiconductor integrated circuit can not normal running under extreme environment, for example, the ordinary semiconductor integrated circuit can't be operated under extreme cold or extreme hot environment.Therefore, if the light source driving circuit that comprises the ordinary semiconductor integrated circuit as shown in Figure 2 is applied to cold area, for example be applied to the outdoor street lamp of drive installation at cold district, then may be because the low excessively element such as semiconductor transistor etc. wherein that causes of environment temperature can't operate as normal.Yet,, can adopt the element of can be at-5.0 ℃ or being lower than operate as normal under-5.0 ℃ the temperature conditions to construct light source driving circuit as shown in Figure 4 according to current exemplary embodiment.For example, though can adopt environment temperature be equal to or less than-40 ℃ also can operate as normal the resistor and the element of capacitor etc. construct as shown in Figure 4 voltage regulator circuit 2 ', protect and improve circuit 5 ' and/or current regulating circuit 6 '.Therefore, light source driving circuit as shown in Figure 4 and the outdoor illumination that comprises this light source driving circuit go for the temperature conditions such as cold of high latitude area, for example, and can be as being suitable for the street lamp that high latitude area uses.
Fig. 5 is the schematic diagram that illustrates according to the outdoor illumination of exemplary embodiment.Fig. 6 is the schematic cross sectional views that illustrates according to the light source board in the outdoor illumination of exemplary embodiment.Figure 5 illustrates as example, yet exemplary embodiment is not limited thereto, can be other outdoor illumination such as Projecting Lamp, Square Lamp according to the outdoor illumination of exemplary embodiment according to the street lamp of the outdoor illumination of exemplary embodiment.
Outdoor illumination according to exemplary embodiment can comprise light source driving circuit plate and light source board.The light source driving circuit plate is provided with light source driving circuit.For example, on the light source driving circuit plate, can be provided with the light source driving circuit of describing with reference to Fig. 2 to Fig. 4 as top.The LED source that is electrically connected to described light source driving circuit is installed on light source board, and this LED source can comprise a plurality of light emitting diodes.According to exemplary embodiment, described a plurality of light emitting diodes can comprise little smooth firing angle light emitting diode.In the time will being embodied as street lamp according to the outdoor illumination of exemplary embodiment, as shown in Fig. 5 and Fig. 6, this street lamp can comprise light source driving circuit plate 11, light source board 12, and can also comprise lampshade 14 and base 15.As shown in Figure 5, light source driving circuit plate 11 and light source board 12 can be arranged in the lampshade 14.Yet exemplary embodiment is not limited thereto, and can only light source board 12 be arranged in the lampshade 14, and light source driving circuit plate 11 is arranged in the base 15.From the light that is installed in LED source 4 emission on the light source board 12 can transmission lampshade 14 by printing opacity be launched into the outdoor illumination outside.
The LED source 4 that is installed on the light source board 12 can comprise a plurality of light emitting diode groups that are connected in parallel, and each light emitting diode group can comprise a plurality of LEDs that are connected in series.
Be included in the vertical direction that a plurality of LEDs in the LED source 4 can be installed to be with respect to light source board 12 and tilt, as shown in Figure 6.By above-mentioned layout, first area HTA and second area LTA can formed between the body at each LED on the light source board 12, wherein, the distance in the HTA of first area between the body of LED is less than the distance in second area LTA between the body of LED.For example, can be by being arranged in the inclination of the LED on the light source board 12, make distance between the body of the LED that at least some are adjacent less than the distance between the body of other adjacent LEDs at least.Therefore, even (for example with the pin arrangement pattern of the essentially identical rule of pin distances, matrix pattern) LED is installed on the light source board 12, also can forms first area HTA and second area LTA by LED is installed obliquely.
Because compare with the distance between the body of LED in second area LTA, distance between the body of the LED in the HTA of first area is less, promptly, the body of the LED in the HTA of first area is more intensive, so when LED source 4 was luminous, the temperature of first area HTA can be higher than the temperature of second area.Therefore, first area HTA also can be called high-temperature area, and second area LTA also can be called low-temperature region.Because of each regional temperature difference can cause each regional air pressure difference.That is, the air pressure of high-temperature area is lower than the air pressure of low-temperature region.Therefore, the principle that produces wind according to the air horizontal movement as can be known, the hypobaric high-temperature area of the air flow of anticyclonic low-temperature region, thus produce wind.When LED source 4 is luminous, because compare with the LED in second area LTA, the body of the LED in the HTA of first area is more intensive, so temperature height and air pressure in the HTA of first area are low, and the temperature in second area LTA is low and air pressure is high.Because of such draught head has produced the air-flow that flows to first area HTA (high-temperature area) from second area LTA (low-temperature region), that is, and natural wind.By flowing of such air-flow, accelerated the heat transmission between the air that LED is in contact with it, thereby can dispel the heat to LED better from low-temperature region to high-temperature area.
One of important factors that influences semiconductor light-emitting-diode and application product life-span thereof is its heat dissipation problem.The heat radiation of current high power led lighting product is to rely on bulky heat dissipation equipment to carry out forcing heat radiation from heat conduction, heat radiation or with accessory equipments such as ventilating fans.Low power LED itself is little because of its operating current, caloric value is little, considers heat dissipation design in its application product hardly, therefore adopts equal altitudes, equidistant, equal angular proper alignment mode usually.This way can be ignored really to the low-power applications product, but then should in design, need think better of and solve the problem of its heat radiation at the illuminating product of the medium-term and long-term work of improper ventilation environment to making relatively large power application product (as street lamp) and needing.According to exemplary embodiment, tilt by the vertical direction that light emitting diode is installed as with respect to light source board, thereby formed many passage of heats of natural wind that the motion principle that has utilized atmosphere produces are dispelled the heat, and have therefore reached the optimum efficiency of natural heat dissipation preferably.
Preferably, be included in a plurality of LEDs in the LED source 4 and can be installed to be tilt 0 ° to 5 ° angle of vertical direction with respect to light source board 12.Usually, 0 ° to 5 ° is the allowable error scope of light emitting diode mounting process, does not have the problem of light loss.In addition, under the situation of the light emitting diode big, can strengthen mounting inclination angle because of the lighting angle selected according to the purposes of product.
The illuminating product that the 180W of 5400 light emitting diodes has been installed by this mounting means has been carried out about 168 hours continuous luminous survey.Up to EOT, the internal temperature of this product remains at below 60 ℃ from the test beginning.From the result of this test as can be seen, because so irregular passage of heat, make and in small-power semiconductor diode illuminating product, can realize suppressing the temperature rise in the passage and the effect of power-assisted natural heat dissipation.This not only helps really to embody the meaning of semiconductor cold light source illumination, simultaneously to having carried out effective correction with traditional temperature rise mode of energising close association service time.This radiating mode is a kind of lively application that produces the natural wind energy physical principle, the input expense of having saved a large amount of heat dissipation equipments and having utilized auxiliary equipment such as fan to force heat radiation, and the more important thing is and realized once well energy-conserving and environment-protective in the optical semiconductor product-derived.
In addition, because the vertical direction that LED is installed as with respect to light source board 12 tilts, so can enlarge the illumination zone of outdoor illumination.
According to exemplary embodiment, can be used for outdoor illumination by the LED that the light firing angle is little.According to the industry regulation of light emitting diode classification, light emitting diode can be divided into according to its light firing angle: little smooth firing angle light emitting diode, and its light firing angle is less than 40 °; Middle light firing angle light emitting diode, its light firing angle is in 40 ° to 80 ° scope; Big light firing angle light emitting diode, its light firing angle is greater than 80 °.In existing lighting device manufacturing process, require to adopt the light emitting diode of light firing angle, and the light firing angle of for example little smooth firing angle light emitting diode does not meet the light emitting diode of above-mentioned requirements and can be regarded as " substandard products " and be dropped more than or equal to certain value.Yet,, little smooth firing angle light emitting diode is used for outdoor illumination according to current exemplary embodiment.
Because little smooth firing angle light emitting diode is applied to outdoor illumination, so as shown in Figure 5, the field of illumination of the light of outdoor illumination emission can be divided into non-uniform areas and homogeneous area.Non-uniform areas be light that each LED from outdoor illumination sends do not mix or mix uneven zone, homogeneous area is the well-mixed zone of light that each LED from outdoor illumination sends.Though the light firing angle of each LED of outdoor illumination is less and therefore cause non-uniform areas bigger, but because the vertical direction that LED is installed as with respect to light source board 12 tilts, and outdoor illumination is set to usually apart from position far away, User Activity space, so be in by mixed uniformly state when the light from the outdoor illumination emission arrives the User Activity space.Here, the User Activity space is meant individual's the residing space of common activity in production/life activity.Therefore, though outdoor illumination adopts little smooth firing angle light emitting diode, because the vertical direction that LED is installed to be with respect to light source board 12 tilts, so can in the User Activity space, obtain uniform illumination light.
On the other hand, because the light of outdoor illumination emission has bigger non-uniform areas (promptly, bigger zone, do not have mixed from the light of each LED emission), therefore, light can not occur in this bigger non-uniform areas because of stack or the relevant loss that causes.Because light firing angle or big light firing angle light emitting diode are to prevent providing the illumination light that still is in non-uniform areas to the User Activity space in the unified employing of traditional light source, so light therefrom can mix with the light of launching from other light emitting diode after light firing angle or the big light firing angle light emitting diode emission immediately, thereby has caused serious light loss.In other words, the light firing angle is big more, and the light loss that causes is also just big more.Yet, in current exemplary embodiment, because adopted the outdoor illumination of little smooth firing angle LED to be set at apart from position far away, User Activity space, so can allow the light of outdoor illumination emission to be had big non-uniform areas before shining the User Activity space evenly mixing, thereby make that the light of remote light source 200 emissions is just mixed when arriving the User Activity zone, thereby reduced the loss of the light of remote light source 200 emissions.For example, the light loss of the light source of light firing angle or big light firing angle light emitting diode is about 40% in traditional employing, and can only be about 4% according to the light loss of the outdoor illumination of current exemplary embodiment.
In addition, because the angle of inclination difference of LED, thus can realize the illuminating effect similar or identical with the illuminating effect of shadowless lamp, thus further protected in eyesight according to the user under the illumination of the outdoor illumination of exemplary embodiment.
As mentioned above, in the prior art, adopt equal altitudes, equidistant, equal angular proper alignment mode that light emitting diode is installed usually.Yet,, adopt not the mode of isogonism that LED is installed according to example embodiment, promptly, the vertical direction that LED is installed as with respect to light source board 12 tilts, and the angle of inclination of each LED can be incomplete same, as shown in Figure 6.In Fig. 6, have different distances between the body of each LED, but the distance between the pin of each LED can be identical.In other words, can be (for example with the pin arrangement pattern of the essentially identical rule of pin distances, matrix pattern) LED is installed on the light source board 12, and the vertical direction that only LED is installed as with respect to light source board 12 tilts, thereby for example is irregularly formed first area HTA and second area LTA.Yet, exemplary embodiment is not limited thereto, can LED be installed with the incomplete same pin arrangement pattern of pin distances, and/or LED is installed as with respect to the vertical direction of light source board 12, thereby form first area HTA and second area LTA.
According to an exemplary embodiment, can be by selecting the quantity of LED, to realize the outdoor illumination of various rated power.
According to exemplary embodiment, above-mentioned semiconductor cold light source outdoor illumination is connected to the external power source such as civil power, 220V, 50Hz alternating current are through above-mentioned light source driving circuit optimization, rectification, adjusting, output be equivalent to light emitting diode group operating voltage and the pressure drop of light source regulating circuit and DC voltage, make the normal luminous work of semiconductor cold light source (that is, LED source 4).During deenergization, each circuit in the light source driving circuit forms effective repid discharge loop automatically, and the semiconductor cold light source is extinguished rapidly, bleeds off electric charge in the circuit simultaneously rapidly.
According to the outdoor illumination luminous efficiency height of exemplary embodiment, have light source nargin, anti-power supply interference performance is strong.Its power consumption is very little simultaneously, and caloric value keeps the low temperature of lamp constant, and can realize that long-term illumination does not affect one's power of vision far below known LED source.For versatility and low cost, lamp housing adopts the general light fixture material of outdoor illumination, satisfies being extensive use of and installation requirement, and all components and parts have been realized production domesticization.Circuit board mounting base and lampshade all adopt the versatility lamp outer casing, size and instructions for use according to the light fixture size, can make the outdoor illumination of different wattages respectively, indexs such as its interchangeability, protection against electric shock, insulation and economize on electricity intensity, mechanical strength, security all meet national standard.
According to exemplary embodiment, LED source can be the semiconductor cold light source.Adopted semiconductor cold light source regulating circuit in the outdoor illumination, the light emitting diode group obtains optimum operating voltage under the satisfied externally primary power source normal power supply condition, and it is very big (under the state of 100V～300V) in voltage pulsation, also can stablize provides power supply, makes the light emitting diode cold light source be able to work.To a shaped article, this circuit need not adjusted after solidifying.
In outdoor illumination according to exemplary embodiment, can consider at the same time that the basis of the light firing angle of each light emitting diode comes up to arrange light emitting diode on light source board, thereby mix from the light of each light emitting diode emission of outdoor illumination, to obtain the even brightness illumination light.Therefore; in outdoor illumination according to exemplary embodiment; do not need to abandon little smooth firing angle light emitting diode; make the overwhelming majority even the whole light emitting diodes produced all can be utilized; thereby greatly reduced production cost; and exempted recovery technology substantially to the light emitting diode that abandons, can the light emitting diode of fundamentally protecting environment to be not dropped and/the recovery technology of the light emitting diode that abandons is polluted.
Though illustrated and described the example of exemplary embodiment, but what those skilled in the art should understand that is, exemplary embodiment is not limited thereto, and is not breaking away under the situation of the spirit and scope that limit as claim, can carry out various changes and modification at this.
Claims (10)
1. outdoor illumination is characterized in that comprising:
The light source driving circuit plate, the light source driving circuit plate is provided with light source driving circuit;
Light source board is equipped with the LED source that is electrically connected to described light source driving circuit on light source board, this LED source comprises a plurality of light emitting diodes, and described a plurality of light emitting diodes comprise that the light firing angle is less than 40 ° light emitting diode.
2. outdoor illumination as claimed in claim 1, it is characterized in that being included in the vertical direction that a plurality of light emitting diodes in the LED source are installed to be with respect to light source board tilts, to form first area and second area on the light source board between the body at each light emitting diode, wherein, the distance in the first area between the body of light emitting diode is less than the distance in second area between the body of light emitting diode.
3. outdoor illumination as claimed in claim 2 is characterized in that being included in a plurality of light emitting diodes in the LED source and is installed to be tilt 0 ° to 5 ° angle of vertical direction with respect to light source board.
4. outdoor illumination as claimed in claim 1 is characterized in that described light source driving circuit comprises rectifier circuit, voltage regulator circuit and light emitting diode drive source circuit, wherein,
Rectifier circuit is connected to external power source, will be provided to voltage regulator circuit through first output of rectification with the positive terminal by rectifier circuit,
Voltage regulator circuit is regulated the voltage of first output, is lower than second output of the voltage of first output with formation voltage,
The light emitting diode drive source circuit receives second output and regulates second output from voltage regulator circuit, have with generation specific period voltage the 3rd output and the 3rd output is provided to the positive terminal of LED source, wherein, described specific period is less than the cycle of the voltage of first output.
5. outdoor illumination as claimed in claim 4 is characterized in that the voltage waveform of described the 3rd output is zig-zag, square waveform, triangular waveform or sinusoidal waveform.
6. outdoor illumination as claimed in claim 4, the valley point voltage value that it is characterized in that the 3rd output is greater than zero, and the crest voltage value of the 3rd output is less than the crest voltage value of first output.
7. outdoor illumination as claimed in claim 6 is characterized in that the luminous operational voltage value of the valley point voltage value of the 3rd output more than or equal to LED source.
8. as any described outdoor illumination of claim among the claim 4-7, it is characterized in that described light source driving circuit also comprises current regulating circuit, this current regulating circuit is connected between the negative pole end of the negative pole end of LED source and rectifier circuit, is adjusted to predetermined value with the electric current that will flow in LED source.
9. as any described outdoor illumination of claim among the claim 4-7; it is characterized in that described light source driving circuit also comprises protection and improves circuit; this protection and improve circuit and be connected between external power source and the rectifier circuit, and be provided to being connected in series in the inductor between external power source and the rectifier circuit and filtering the capacitor that is connected in parallel with rectifier circuit that is provided to high frequency clutter the output of rectifier circuit from external power source and form of high frequency clutter the output of rectifier circuit by alleviating from external power source.
10. outdoor illumination as claimed in claim 1 is characterized in that described light source driving circuit comprises rectifier circuit, voltage regulator circuit and current regulating circuit, wherein,
The input of rectifier circuit is connected to external power source, and the positive terminal of rectifier circuit is connected to first end of current regulating circuit, and the negative pole end of rectifier circuit is connected to the negative pole end of LED source,
First end of voltage regulator circuit is connected to the positive terminal of rectifier circuit and first end of current regulating circuit, second end of voltage regulator circuit is connected to the negative pole end of LED source, voltage regulator circuit carries out filtering to the output from the positive terminal of rectifier circuit, and adjusting is from the voltage of the output of the positive terminal of rectifier circuit
Second end of current regulating circuit is connected to the positive terminal of LED source,
Wherein, rectifier circuit, voltage regulator circuit and current regulating circuit can be at-40 ℃ or are lower than under-40 ℃ the environment temperature and work.
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| CN2011102200367A CN102297373A (en) | 2011-08-02 | 2011-08-02 | Outdoor illuminating device |
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| CN2011102200367A CN102297373A (en) | 2011-08-02 | 2011-08-02 | Outdoor illuminating device |
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Application publication date: 20111228 |