CN104582160B - A kind of LED/light source module - Google Patents
A kind of LED/light source module Download PDFInfo
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- CN104582160B CN104582160B CN201410830530.9A CN201410830530A CN104582160B CN 104582160 B CN104582160 B CN 104582160B CN 201410830530 A CN201410830530 A CN 201410830530A CN 104582160 B CN104582160 B CN 104582160B
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Abstract
The invention discloses a kind of LED/light source module, including sampling unit, LED/light source module include by the first LED modules and the first constant current unit tie point in series, the 2nd LED modules and the second constant current unit the second branch road in series ... the n-th LED modules and the n-th constant current unit the n-th branch road in series, the sampling unit is connected with each constant current unit, by the different arrangement modes and the current value of setting branch road constant current unit of LED in LED modules and its shut-off, voltage is connected, the periodic flicker phenomenon that alternating voltage change can be avoided to produce.Because the electric current of every branch road is constant, LED will not cause the change of electric current because of the change of junction temperature, improve reliability.The increase of branch road quantity can make drive current waveform close to sine wave, improve the power factor and efficiency of light-emitting device.LED modules are constituted especially with luminescent lifetime controllable LED, the twilight sunset that can be lighted using LED further overcomes LED scintillations caused by alternating current.
Description
The present invention is that original applying number is that 201210005714.2, original application day is on 01 10th, 2012, former denomination of invention
For the divisional application of the White LED light-emitting device of the direct constant current driving of alternating current.
Technical field
The present invention relates to field of LED illumination, more particularly to a kind of LED/light source module.
Background technology
LED is expected to turn into a new generation's illumination as a kind of New Solid light source, the advantages of with its energy-saving and environmental protection, long lifespan
Light source.It is well known that existing LED is nearly all to use DC powered, and our production and living electricity consumption is alternating current.Cause
This, it is necessary to which a power supply changeover device, direct current is converted to by alternating current in the LED product used at present.Power supply changeover device
Introduce, bring many negative effects.First, life-span of the life-span of power supply changeover device well below LED itself so that lighting device
Service life shorten；Second, power supply changeover device can reduce the efficiency of light-emitting device；Third, in low-power applications, power supply turns
Parallel operation can cause the increase of decline and the current total harmonic distortion of power factor.In order to give full play to the advantage of semiconductor lighting,
The LED light emission device that can be directly driven with alternating current turns into current study hotspot.
It is whole according to reverse parallel connection or bridge-type using plurality of LEDs component mostly in existing AC LED public technology
The circuit topological structure of stream is formed by connecting, to meet the driving requirement of alternating electromotive force.But, alternating current is according to certain frequency
Cyclic fluctuation, due to the presence of LED itself cut-in voltages, when instantaneous voltage exceedes cut-in voltage, LED can just be turned on simultaneously
It is luminous.Conversely, LED be off it is non-luminous.This circuit make it that LED luminous efficiency is very low, and with alternating voltage ripple
It is dynamic light-emitting flash phenomenon occur.
International monopoly WO 2004/023568A1 " LIGHT-EMITTING DEVICE HAVING LIGHT-EMITTING
In ELEMENTS ", it is proposed that integrated LED chip array on a sapphire substrate, so as to provide a kind of hair of alternating electromotive force driving
Electro-optical device, but without the light-emitting flash for solving the problems, such as LED.
United States Patent (USP) US 7,489,086B2 " AC LIGHT EITTING DIODE AND AC LED DRIVE
METHODS AND APPARATUS " provide a kind of AC LED device, and the invention is a kind of device by multiple LED integration packagings
Part, LED light-emitting flash phenomenon caused by alternating current is made up using the visual persistence effect of human eye.The patent is without fundamentally
Solve the light-emitting flash phenomenon that AC voltage cycle fluctuation is caused.
It can be seen that, in disclosed LED alternating-current actuation techniques, all in the presence of a shortcoming：LED driving current can be with exchange
The fluctuation of voltage and fluctuate, cause occur brightness change when LED is luminous, produce the phenomenon of light-emitting flash.Meanwhile, LED component
Core is a PN junction diode, and its I-V characteristic is approximate exponential function, after the voltage at LED two ends is more than cut-in voltage,
The electric current for flowing through PN junction is exponentially increased.The AC driving method of prior art, due to not using constant-current circuit, in LED junction
During temperature rise, its cut-in voltage can decline, because input voltage is constant so that LED forward current is sharply increased, meeting when serious
LED PN junction is set to cause thermal breakdown, permanent damages.
Publication No. CN102209415A Chinese patent discloses a kind of direct power supply circuit of LED alternating-current, including rectification
Circuit, n sections of LED strings and n roads overvoltage protection constant-current source corresponding with n sections of LED strings, according to direction of current flow, LED
One end of string and rectification circuit output end are connected, and are connected respectively to per one end of road overvoltage protection constant-current source corresponding
LED string section, the other end is commonly connected to another output end of rectification circuit.The operation principle of documents is overvoltage protection
Constant-current source controls the turn-on and turn-off of constant-current source by the overvoltage value at constant-current source two ends, so as to control every section of LED light on and off.
Documents, which are disadvantageous in that, can not solve, because ac period is powered the LED scintillations brought, to make
The luminous efficiency for obtaining LED string is relatively low.
Although documents disclose the light on and off for controlling every section of LED string respectively by overvoltage protection constant-current source, contrast
File does not disclose the arrangement mode of the LED array of the present invention, does not disclose special using the technology of luminescent lifetime controllable LED yet
Levy, those skilled in the art's technical characteristic according to disclosed in documents is not allowed to be readily conceivable that the present invention's is " controllable by luminescent lifetime
LED be combined with LED arrangement modes, reach reduction LED light-emitting flash phenomenon ", the present invention is not present above-mentioned documents
Technical enlightenment, the present invention is non-obvious compared with documents.Different arrangement modes and hair that the present invention passes through LED
Light life-span controllable LED combination, and pass through the circuit of the constant respective branch of constant current unit, LED junction temperature is reduced, LED is improved
General exchange electric drive circuit can be coordinated in the reliability of module, practical application, you can preferably solve LED periodic flickers
The problem of.
The content of the invention
The technical problems to be solved by the invention, LED light emission device is directly driven aiming at prior art alternating current
There is provided a kind of White LED light-emitting device of the direct constant current driving of alternating current for problem.
The present invention solves the technical problem, and the technical scheme of use is that the white light LEDs of the direct constant current driving of alternating current are sent out
Electro-optical device, including ac input end, protection location and rectification unit, it is characterised in that the first output end of the rectification unit
And second be parallel between output end tie point, the second branch road ... the n-th branch road, the tie point is by the first LED modules
It is in series with the first constant current unit, it is described second route the 2nd LED modules and the second constant current unit it is in series ... ... institute
State n-th the n-th LED module of route and the n-th constant current unit is in series, each constant current unit is connected with sampling unit, wherein
N >=1, and be integer；
The ac input end is used to connect alternating current, and operating current is provided for device；
The protection location is connected with ac input end, is that device is provided protection against；
The rectification unit is connected with protection location, and rectification is carried out to the alternating current that protection location is exported；
The sampling unit is used to sample to the output voltage of rectification unit, and outputs a control signal to each constant current
Unit；
Each constant current unit is connected with sampling unit, the electric current of constant respective branch and the control exported according to sampling unit
Signal turns on and off respective branch；
The LED modules are made up of LED array, and the LED in the LED array is the controllable LED of luminescent lifetime.
In the light-emitting device technical scheme of the present invention, the parallel branch of the constant current unit composition of n bar LED modules and its series connection
Rectification circuit output end is connected to, by the current value of setting branch road constant current unit and its shut-off, voltage is connected, can avoid
The periodic flicker phenomenon that alternating voltage change is produced.Due to every branch road electric current when be constant, the LED in LED modules
The change of electric current will not be caused because of the change of junction temperature, LED reliability is improved.By theory analysis it is recognised that branch
The increase of way amount can make drive current waveform close to sine wave, improve the power factor and efficiency of light-emitting device.Particularly
LED modules are constituted using luminescent lifetime controllable LED, the twilight sunset that can be lighted using LED further overcomes LED caused by alternating current to dodge
Bright phenomenon, and the efficiency of LED light emission device is improved, extend LED service life.
Specifically, the controllable LED luminescent lifetimes of the luminescent lifetime are 1~100ms.
The extension of LED luminescent lifetimes, is conducive to overcoming scintillation.
Further, the luminescent lifetime is 10~30ms.
The luminescent lifetime time of the scope matches with ac period (1/50s or 1/60s), can rightly play
Its twilight sunset advantage, and be technically easier to realize, cost is also lower.
Further, the LED array is made up of at least one LED being arranged on same printed circuit board, or integrated
At least one LED of encapsulation on the same substrate is constituted, or integrated at least one LED on the same semiconductor substrate is constituted.
LED all in LED modules is arranged on same printed circuit board, is most simple, warp under state-of-the-art
The method for packing of Ji；By LED integration packagings all in LED modules on the same substrate, referring to will be all in LED modules
LED carries out secondary encapsulation, is integrated on same heat-radiating substrate；LED all in LED modules is integrated in same semi-conductive substrate
On, this is to use semiconductor integrated circuit technique, realizes that LED's is integrated on same semiconductor chip.These technologies are all to work as
The LED integration packaging technologies of preceding comparative maturity.
Specifically, LED is in parallel in each LED module and/or is connected in series.
The connection combinations of LED suitably, such as in parallel, series connection or series-parallel connection, more can adapt to alternating current and directly drive in LED modules
Dynamic use environment, easily adjusts electric current, the voltage parameter of each LED module.
Further, the first LED modules, the 2nd LED modules ... the LED quantity included in the n-th LED modules is respectively
12、22、……n2, corresponding constant current unit electric current be respectively I, 2I ... nI；I is the first constant current unit electric current.
This regularity of distribution of LED quantity in LED modules, it is possible to achieve the multiple proportion of individual branch current, makes total current
Waveform is conducive to improving the power factor and efficiency of light-emitting device close to sine wave.
Further, as n >=2, same LED belongs to different LED modules simultaneously.
LED interlaced arrangements in each LED module can be made same or several LED while belonging to different by the program
LED modules, realize LED multiplexing, it is possible to reduce the LED quantity of light-emitting device, improve light-emitting device luminosity it is uniform
Property, be conducive to overcoming scintillation.
Specifically, the protection location includes fuse and/or piezo-resistance, the fuse is connected on exchange input
End, the piezo-resistance is connected in parallel on ac input end.
Fuse is conventional current-limiting protection element, and piezo-resistance is then conventional voltage-limiting protection element, their combination
Most basic current limliting and voltage-limiting protection can be completed, and cost is low, it is easy for installation, it is convenient for Two-level ensemble.
Further, the protection location also includes common mode choke and/or gas-discharge tube, the common mode choke string
Ac input end is associated in, the gas-discharge tube is connected in parallel on ac input end.
Increase common mode choke and gas-discharge tube, common mode choke can be disturbed with suppression common mode, gas-discharge tube can be with
Lighting device is protected not injured by thunder and lightning etc..
Specifically, full-wave rectifying circuit or half-wave rectifying circuit that the rectification unit is made up of commutation diode are constituted.
Using commutation diode as rectifier cell, small in volume is convenient for Two-level ensemble encapsulation.
Specifically, the sampling unit is made up of resistor network.
Resistor network is especially suitable for gathering DC parameter, is easy to set the operating point of constant current unit off and on.
The beneficial effects of the invention are as follows using the direct constant-current driving LED module of alternating electromotive force, circuit is simple, small volume, again
Amount is light, and cost is low.By appropriate preset each branch current and switching voltage, LED light emission device when can mitigate alternating current fluctuation
Periodic flicker, and when alternating current instantaneous voltage is too high, constant current unit shut-off, LED modules do not light, and improve power supply
Utilization ratio, reduces power consumption.Simultaneously as using current constant control, it is to avoid LED modules are because of variations injunction temperature, electric current mistake
Situation about burning greatly, extends the service life of device.LED modules are constituted using luminescent lifetime controllable LED, can be utilized
The luminous twilight sunset of LED further overcomes LED scintillations caused by alternating current, and improves the efficiency of LED light emission device, extends LED
Service life.In the present invention, the luminous twilight sunset of LED is combined with circuit advantage, and effect is obvious.
Brief description of the drawings
Fig. 1 is the structured flowchart of the present invention；
Fig. 2 is the circuit theory diagrams of embodiment 1；
Fig. 3 is the schematic diagram of embodiment 2；
Fig. 4 is the schematic diagram of embodiment 3；
Fig. 5 is voltage and current waveform.
Embodiment
Below in conjunction with the accompanying drawings and embodiment, technical scheme is described in detail.
Luminescent lifetime controllable LED, refers to the LED that luminescent lifetime is 1~100ms.Defined according to luminescence, luminescent lifetime is
Luminous intensity drops to the time needed for the 1/e of maximum intensity when exciting.
Luminescent lifetime controllable LED in the present invention, contains inorganic and/or luminous organic material the combination of one or more.Than
Such as：CaS：Eu；CaS:Bi,Tm；ZnS:Tb；CaSrS2:Eu,Dy；SrGa2S4:Dy；Ga2O3:Eu；(Y,Gd)BO3:Eu3+；
Zn2SiO4:Mn2+；YBO3:Tb3+；Y(V,P)O4:Eu3+；SrAl2O4:Eu2+；SrAl2O4:Eu2+,B；SrAl2O4:Eu2+,Dy3+,B；
BaAl2O4:Eu2+；CaAl2O4:Eu2+；Sr3SiO5:Eu2+,Dy3+；BaMgAl10O17:Eu2+,Mn2+；Tb(acac)2(AA)phen；
Y2O2S:Eu3+,Y2SiO5:Tb3+；SrGa2S4:Ce3+；Y3(Al,Ga)5O12:Tb3+；Ca2Zn4Ti15O36∶Pr3+；CaTiO3:Pr3+；
Zn2P2O7:Tm3+；Ca2P2O7:Eu2+,Y3+；Sr2P2O7:Eu2+,Y3+；Lu2O3:Tb,Sr2Al6O11:Eu2+；Mg2SnO4:Mn2+；
CaAl2O4:Ce3+,Tb3+；Sr4Al14O25:Tb3+；Ca10(PO4)6(F,Cl):Sb,Mn；Sr2MgSi2O7:Eu2+；Sr2CaSi2O7:
Eu2+；Zn3(PO4)2:Mn2+,Ga3+；CaO:Eu3+；Y2O2S:Mg2+,Ti3+；Y2O2S:Sm3+；SrMg2(PO4)2:Eu2+,Gd3+；
BaMg2(PO4)2:Eu2+,Gd3+；Zn2SiO4:Mn,As；KLaF4:Er；CdSiO3：Dy3+；MgSiO3：Eu2+, Mn2+In one kind or
It is a variety of.
The White LED light-emitting device of the direct constant current driving of alternating current of the present invention, structured flowchart is as shown in figure 1, including handing over
Flow input 1, protection location 2, rectification unit 3, and the first output end 31 (being usually positive pole) of rectification unit 3 and second defeated
Go out tie point in parallel between end 32 (be usually negative pole), the second branch road ... the n-th branch road.Tie point is by the first LED moulds
The constant current unit 61 of group 51 and first is in series, and second the 2nd LED module 52 of route and the second constant current unit 62 are connected
Composition ... ... n-th route, the n-th LED modules 5n and the n-th constant current unit 6n is in series, and each constant current unit is with adopting
Sample unit is connected, wherein n >=1, and is integer.Ac input end 1, which is used to connect, to be exchanged, and operating current is provided for device；Protection
Unit 2 is connected with ac input end, is that device is provided protection against；Rectification unit 3 is connected with protection location 2, to protection location 2
The alternating current of output carries out rectification, output sinusoidal wave pulse electric current (as shown in Figure 5 a)；Sampling unit 4 is used for rectification unit
Output voltage is sampled, and outputs a control signal to each constant current unit；Each constant current unit is connected with sampling unit 4, permanent
The control signal determined the electric current of respective branch and exported according to sampling unit 4 turns on and off respective branch.
The operation principle of the present invention is briefly described below：
Electric main (being usually sine wave alternating current) enters protection location 2, rectified unit by exchanging input interface 1
3 carry out rectification, and as sinusoidal wave pulse voltage, its voltage waveform is as shown in Figure 5 a.In an ac period T, with input
Voltage is raised, and reaches the cut-in voltage of the first LED modules 51, the first LED modules 51 enter working condition, and electric current gradually increases, and reaches
Constant current state is operated in the predetermined current after to the predetermined current of the first constant current unit 61.Continue to raise with voltage, voltage is arrived
The default shut-off voltage of the first constant current unit 61 is reached, the first constant current unit 61 is turned off, and the first LED modules 51 do not light.Now
Two constant current units 62 are connected, and the 2nd LED modules 52 are started working, and the 2nd LED modules 52 enter after constant current state with the second constant current
The electric current that unit 62 is set maintains constant current operation state, and as voltage continues to rise, the second constant current unit 62 is turned off, with such
Push away, until the n-th LED modules 5n starts working, constant current unit above is all off.If setting the constant current of the first constant current unit 61
Electric current is I, and the continuous current of the second constant current unit 62 is that 2I ... ... the n-th constant current unit continuous currents are nI, and in theory, packet is got over
Many, current waveform is closer to sine wave, and as shown in Figure 5 b, power factor is also higher, and efficiency is also higher, but circuit is also more multiple
Miscellaneous, placement-and-routing is also more difficult.Therefore, in actual applications, the LED module structures of limited constant current unit and respective amount are chosen
Into limited bar branch road.
Embodiment 1
As shown in Fig. 2 this example protection location 2 is made up of fuse F and piezo-resistance VR, it is defeated that fuse F is connected on exchange
On the phase line L for entering end 1, piezo-resistance VR is connected in parallel between the phase line L of ac input end 1 and zero line N.Protection location 2 and all-wave
The rectification unit 3 that rectification circuit D1 is constituted is connected, the output end of rectification unit 34 branch roads of parallel connection.
Tie point is in series by the first LED modules and the first constant current unit, and the first LED modules are by a LED11 structure
Into its anode connection rectification circuit D1 positive poles, negative terminal is connected to rectification circuit D1 negative poles by the first constant current unit.This example is sampled
It is made up of resistor network, including resistance R1~R8.Resistance R1 is connected in parallel on rectification circuit D1 positive poles and negative pole after being connected with resistance R2
Between, resistance R1 and resistance R2 tie point are the sampled point of the first constant current unit, and are connected with the first constant current unit control end.
In the branch road of this example second, the 2nd LED modules are made up of 4 LED, 2 × 2 arrays constituted, including LED21, LED22, LED31
And LED32, they connect in the way of two groups of homopolarities after two LED series aiding connections are in parallel, as shown in Figure 2.2nd LED modules are just
End connection rectification circuit D1 positive poles, negative terminal is connected to rectification circuit D1 negative poles by the second constant current unit.Resistance R3 and resistance R4
It is connected in parallel on after series connection between rectification circuit D1 positive poles and negative pole, resistance R3 and resistance R4 tie point adopting for the second constant current unit
Sampling point, and be connected with the second constant current unit control end.The 3rd LED modules in the branch road of this example the 3rd be made up of 9 LED 3 × 3
Array composition, including LED41, LED42, LED43；LED51、LED52、LED53；LED61、LED62、LED63.These LED
Connected in the way of three groups of homopolarities after three series aiding connections are in parallel, referring to Fig. 2.3rd LED modules anode connection rectification circuit D1
Positive pole, negative terminal is connected to rectification circuit D1 negative poles by the 3rd constant current unit.Resistance R5 is connected in parallel on rectification after being connected with resistance R6
Between circuit D1 positive poles and negative pole, resistance R5 and resistance R6 tie point is the sampled point of the 3rd constant current unit, and with it is the 3rd permanent
Flow the connection of unit control end.In the branch road of this example the 4th, the 4th LED modules are made up of 16 LED, 4 × 4 arrays constituted, including
LED71、LED72、LED73、LED74；LED81、LED82、LED83、LED84；Rectification circuit D1 negative poles LED91, LED92,
LED93、LED94；LED01、LED02、LED03、LED04.These LED are in the way of four groups of homopolarities after four series aiding connections are in parallel
Connection, referring to Fig. 2.4th LED modules anode connects rectification circuit D1 positive poles, and negative terminal is connected to by the 4th constant current unit.Electricity
Resistance R7 is connected in parallel between rectification circuit D1 positive poles and negative pole after being connected with resistance R8, and resistance R7 and resistance R8 tie point are the 4th
The sampled point of constant current unit, and be connected with the 4th constant current unit control end.This example rectification circuit D1 negative poles are common.
It is connected by plug with power network, this example light-emitting device obtains alternating electromotive force, alternating current passes through protection location, and by whole
Stream unit is rectified into direct current (being strictly speaking sinusoidal wave pulse direct current, waveform is as shown in Figure 5 a) and is supplied to voltage sample list
Member, constant current unit and LED modules.In each ac cycle T, rectification circuit D1 output voltages are started from scratch rising, work as voltage
When rise reaches the cut-in voltage of the first LED modules, the first constant current unit is connected, and the first LED modules start to light, into work
State.Voltage continues to raise, and constant current unit 1 is worked with the constant current 20mA of setting, the first LED module electric currents is reached 20mA
Rated current.When voltage rise reaches default shut-off voltage, the first constant current unit shut-off, the first LED modules are stopped, the
One LED modules extinguish, and the 2nd LED modules start to light, into working condition.Voltage is raised, and the second constant current unit is to set
Fixed constant current 40mA work, makes the 2nd LED module electric currents reach 40mA rated current.When voltage is increased to the second constant current list
When member is up to default shut-off voltage, the second constant current unit shut-off, the 2nd LED modules are stopped, and the 3rd LED modules start work
Make, as voltage is raised, the 3rd constant current unit is worked with the constant current 60mA set, reaches the 3rd LED module electric currents
To 60mA rated current.When voltage rise reaches default shut-off voltage, the 3rd constant current unit shut-off, the 4th constant current unit connects
Logical, the 4th LED modules are started working, and when voltage continues to raise, the 4th constant current unit is worked with constant current 80mA, makes the 4th
LED module electric currents reach 80mA rated current.It is the current waveform schematic diagram of this example as shown in Figure 5 b, electric current is not as seen from the figure
The same stage is multiplied, and its waveform convergence is sinusoidal.Make this example light-emitting device that there is very high efficiency and power factor.4th is permanent
Stream unit also has defencive function, when voltage exceedes default shut-off voltage, the shut-off of the 4th constant current unit.In whole light-emitting device
LED modules are all off, and protection light-emitting device is unlikely to damage.
(the LED modules of this example tie point can also regard 1 × 1 as to LED array in the LED modules of each in this example
LED array), the LED that can be arranged on same printed circuit board is constituted, or uses integration packaging technology, and they are collected
Constituted into being encapsulated on same heat-radiating substrate, integrated circuit technology can also be utilized, they are integrated in same semi-conductive substrate
It is upper to constitute.
Embodiment 2
Fig. 3 show this example circuit diagram, it can be seen that this example is except LED modular structures and its connected mode and reality
Apply example 1 different outer, other structures are same as Example 1.Only the LED modular structures of four branch roads are described below, other
Structure and its course of work refer to the description of embodiment 1, pardon not repeating herein.The first LED modules in this example tie point
It is made up of a LED31, the first LED modules anode is connected with rectification circuit D1 positive poles, the first LED modules negative terminal is permanent by first
Stream unit is connected to rectification circuit D1 negative poles.The 2nd LED modules in the branch road of this example second include LED31, LED32, LED21,
LED22 totally 4 LED.When the first constant current unit is turned off, this 4 LED constitute 2 × 2 array,
Wherein LED31 is one group with LED32 series aiding connections, and LED21 is one group, this two groups of homopolarities with LED22 series aiding connections
Parallel connection constitutes the 2nd LED modules, and the 2nd LED modules anode is connected with rectification circuit D1 positive poles, and negative terminal passes through the second constant current list
Member is connected to rectification circuit D1 negative poles.The LED modules of this example the 3rd include LED31, LED32, LED33, LED21, LED22,
LED23, LED11, LED12, LED13 totally 9 LED.When the first constant current unit and the second constant current unit are turned off, this 9 LED
The array of composition 3 × 3, wherein LED31, LED32, LED33 series aiding connection are one group, LED21, LED22, LED23 series aiding connection
One group, LED11, LED12, LED13 series aiding connection are one group, and this three groups of homopolarity this example constitute the 3rd LED modules.3rd LED
Module anode is connected with rectification circuit D1 positive poles, and negative terminal is connected to rectification circuit D1 negative poles by the 3rd constant current unit.Likewise,
When the first constant current unit, the second constant current unit and the 3rd constant current unit are turned off in Fig. 3, the LED31 of four groups of series aiding connections,
LED32, LED33, LED34, LED21, LED22, LED23, LED24, LED11, LED12, LED13, LED14, LED01,
4 × 4 LED array that LED02, LED03, LED04 are constituted constitutes the 4th LED modules of this example, the 4th LED modules anode with
Rectification circuit D1 positive poles are connected, and negative terminal is connected to rectification circuit D1 negative poles by the 4th constant current unit.In this example, each subcircuits
In the same manner as in Example 1, it is also into multiple proportion, if tie point electric current is I, other branch roads are followed successively by 2I, 3I and 4I.
LED in each LED module of this example employs series connection and the mode in parallel combined, and part LED belongs to simultaneously
Multiple LED modules.As in Fig. 3, LED31 belongs to all LED modules simultaneously, LED22 and LED32 belong to simultaneously second, third with
4th LED modules, LED33, LED23 and LED13 are while the third and fourth LED modules.Using this multiplexing structure, greatly subtract
The quantity of luminescence unit is lacked, has reduced light-emitting device cost, and be conducive to overcoming scintillation.
Embodiment 3
As shown in figure 4, this example circuit diagram is compared with Example 2, each LED module connected mode has been done further
Four LED modules in optimization, four branch roads are made up of 16 LED, using 4 × 4 matrix topology structure.The LED of this example the first
Module is made up of totally LED01, LED11, LED21 and LED31 1 × 4 array that 4 LED in parallel are constituted.The LED moulds of this example the 2nd
Group is by LED01, LED11, LED21, LED31, and LED02, LED12, LED22, LED32 LED that totally 8 series and parallels are combined are constituted
2 × 4 arrays composition.The LED modules of this example the 3rd by LED01, LED11, LED21, LED31, LED02, LED12, LED22,
Totally 12 LED strip connection 3 × 4 arrays in parallel being bonded are constituted by LED32, LED03, LED13, LED23, LED33, this example the 4th
LED modules are by LED01, LED11, LED21, LED31, LED02, LED12, LED22, LED32, LED03, LED13, LED23,
Totally 16 LED strip connection 4 × 4 arrays in parallel being bonded are constituted by LED33, LED04, LED14, LED24, LED34, other parts
Annexation and operation principle referring to above-described embodiment.This example circuit maximum feature is that each branch current is identical, that is, is owned
The electric current of constant current unit setting is identical, is 4 times of a LED constant current driving current.
Through above-mentioned detailed explaination, it can be seen that voltage sampling unit monitoring input voltage of the invention, while also having
To the defencive function of LED modules.When big fluctuation occurs in alternating voltage, constant current unit can also disconnect in time, protect LED
Module is because electric current is excessive and damages.The constant current unit of the present invention can be constituted using resolution element and/or integrated circuit, it is desirable to
With switch control functions (can carry out switching off and on control), because physical circuit belongs to this area mature technology, the present invention
It is not described in detail.
It should be noted that, although the structure of the present invention is described in detail in above-described embodiment, but the present invention is not limited
The replacement being just contemplated that without creative work from above-described embodiment in above-described embodiment, every those skilled in the art
Structure, belongs to protection scope of the present invention.
Claims (9)
1. a kind of LED/light source module, including sampling unit, it is characterised in that the LED/light source module is included by the first LED moulds
Organize second in series with the first constant current unit tie point in series, the 2nd LED modules and the second constant current unit
Road ... the n-th LED modules and the n-th constant current unit the n-th branch road in series, the sampling unit connect with each constant current unit
Connect, wherein,
The first LED modules, the 2nd LED modules ... in the n-th LED modules comprising LED quantity be respectively 1 × n, 2 ×
N ... n × n, and it is identical to flow through the electric current of each constant current unit, wherein n are equal to 4, and
The first LED modules are by the first LED (LED01), the 2nd LED (LED11), the 3rd LED (LED21), the 4th LED
(LED31) the array composition of four LED compositions 1 × 4 in parallel in the same direction；
The 2nd LED modules include the first LED (LED01), the 2nd LED (LED11), the 3rd LED (LED21), the 4th LED
(LED31), the 5th LED (LED02), the 6th LED (LED12), the 7th LED (LED22), the 8th LED (LED32) totally eight LED,
When first constant current unit is turned off, this eight LED constitute 2 × 4 array, with four groups of homopolarities after two LED series aiding connections
Mode in parallel constitutes the 2nd LED modules；
The 3rd LED modules include the first LED (LED01), the 2nd LED (LED11), the 3rd LED (LED21), the 4th LED
(LED31), the 5th LED (LED02), the 6th LED (LED12), the 7th LED (LED22), the 8th LED (LED32), the 9th LED
(LED03), the tenth LED (LED13), the 11st LED (LED23), the 12nd LED (LED33) totally ten two LED, when described
When one constant current unit and second constant current unit shut-off, this 12 LED constitute 3 × 4 array, are gone here and there in the same direction with three LED
Four groups of homopolarity modes in parallel constitute the 3rd LED modules after connection；
The 4th LED modules include the first LED (LED01), the 2nd LED (LED11), the 3rd LED (LED21), the 4th LED
(LED31), the 5th LED (LED02), the 6th LED (LED12), the 7th LED (LED22), the 8th LED (LED32), the 9th LED
(LED03), the tenth LED (LED13), the 11st LED (LED23), the 12nd LED (LED33), the 13rd LED (LED04),
14 LED (LED14), the 15th LED (LED24), the 16th LED (LED34) totally ten two LED, when the first constant current list
During first, described second constant current unit and the 3rd constant current unit shut-off, this 16 LED constitute 4 × 4 array, with four
Four groups of homopolarity modes in parallel constitute the 4th LED modules after LED series aiding connections；
Wherein, the LED modules are made up of LED array, and the LED in the LED array is the controllable LED of luminescent lifetime.
2. LED/light source module as claimed in claim 1, it is characterised in that
The luminescent lifetime controllable LED contains one or more inorganic and/or luminous organic material combinations, including：CaS：Eu；
CaS:Bi,Tm；ZnS:Tb；CaSrS2:Eu,Dy；SrGa2S4:Dy；Ga2O3:Eu；(Y,Gd)BO3:Eu3+；Zn2SiO4:Mn2+；
YBO3:Tb3+；Y(V,P)O4:Eu3+；SrAl2O4:Eu2+；SrAl2O4:Eu2+,B；SrAl2O4:Eu2+,Dy3+,B；BaAl2O4:Eu2+；
CaAl2O4:Eu2+；Sr3SiO5:Eu2+,Dy3+；BaMgAl10O17:Eu2+,Mn2+；Tb(acac)2(AA)phen；Y2O2S:Eu3+,
Y2SiO5:Tb3+；SrGa2S4:Ce3+；Y3(Al,Ga)5O12:Tb3+；Ca2Zn4Ti15O36∶Pr3+；CaTiO3:Pr3+；Zn2P2O7:Tm3 +；Ca2P2O7:Eu2+,Y3+；Sr2P2O7:Eu2+,Y3+；Lu2O3:Tb,Sr2Al6O11:Eu2+；Mg2SnO4:Mn2+；CaAl2O4:Ce3+,
Tb3+；Sr4Al14O25:Tb3+；Ca10(PO4)6(F,Cl):Sb,Mn；Sr2MgSi2O7:Eu2+；Sr2CaSi2O7:Eu2+；Zn3
(PO4)2:Mn2+,Ga3+；CaO:Eu3+；Y2O2S:Mg2+,Ti3+；Y2O2S:Sm3+；SrMg2(PO4)2:Eu2+,Gd3+；BaMg2
(PO4)2:Eu2+,Gd3+；Zn2SiO4:Mn,As；KLaF4:Er；CdSiO3：Dy3+；MgSiO3：Eu2+, Mn2+In one kind or many
Kind.
3. LED/light source module as claimed in claim 2, it is characterised in that each constant current unit is connected with sampling unit, constant
The electric current of the respective branch and control signal exported according to sampling unit turns on and off respective branch.
4. a kind of LED/light source module, including sampling unit, it is characterised in that the LED/light source module is included by the first LED moulds
Organize second in series with the first constant current unit tie point in series, the 2nd LED modules and the second constant current unit
Road ... the n-th LED modules and the n-th constant current unit the n-th branch road in series, the sampling unit connect with each constant current unit
Connect, wherein,
The first LED modules, the 2nd LED modules ... comprising LED quantity be respectively 1 in the n-th LED modules2、22、……
n2, corresponding constant current unit electric current be respectively I, 2I ... nI；I is the first constant current unit electric current；Wherein n be equal to 4, and
The first LED modules in tie point are made up of the first LED (LED31)；
The 2nd LED modules in second branch road include the first LED (LED31), the 2nd LED (LED32), the 3rd LED (LED21) and
4th LED (LED22) totally four LED, when the first constant current unit is turned off, this four LED constitute 2 × 2 array, with two
Two groups of homopolarity modes in parallel constitute the 2nd LED modules after LED series aiding connections；
The 3rd LED modules in 3rd branch road include the first LED (LED31), the 2nd LED (LED32), the 3rd LED (LED21),
4th LED (LED22), the 5th LED (LED33), the 6th LED (LED23), the 7th LED (LED11), the 8th LED (LED12) and
9th LED (LED13) totally nine LED, when first constant current unit and second constant current unit are turned off, this nine LED
The array of composition 3 × 3, the 3rd LED modules are constituted in the way of three groups of homopolarities after three LED series aiding connections are in parallel；
The 4th LED modules in 4th branch road include the first LED (LED31), the 2nd LED (LED32), the 3rd LED (LED21),
4th LED (LED22), the 5th LED (LED33), the 6th LED (LED23), the 7th LED (LED11), the 8th LED (LED12),
Nine LED (LED13), the tenth LED (LED34), the 11st LED (24), the 12nd LED (LED14), the 13rd LED (LED01),
14th LED (LED02), the 15th LED (LED03) and the 16th LED (LED04) totally ten six LED, when first constant current
When unit, second constant current unit and the 3rd constant current unit shut-off, this 16 LED constitute 4 × 4 array, with four
Four groups of homopolarity modes in parallel constitute the 4th LED modules after LED series aiding connections；
Wherein, the LED modules are made up of LED array, and the LED in the LED array is the controllable LED of luminescent lifetime.
5. LED/light source module as claimed in claim 4, it is characterised in that
The luminescent lifetime controllable LED contains one or more inorganic and/or luminous organic material combinations, including：CaS：Eu；
CaS:Bi,Tm；ZnS:Tb；CaSrS2:Eu,Dy；SrGa2S4:Dy；Ga2O3:Eu；(Y,Gd)BO3:Eu3+；Zn2SiO4:Mn2+；
YBO3:Tb3+；Y(V,P)O4:Eu3+；SrAl2O4:Eu2+；SrAl2O4:Eu2+,B；SrAl2O4:Eu2+,Dy3+,B；BaAl2O4:Eu2+；
CaAl2O4:Eu2+；Sr3SiO5:Eu2+,Dy3+；BaMgAl10O17:Eu2+,Mn2+；Tb(acac)2(AA)phen；Y2O2S:Eu3+,
Y2SiO5:Tb3+；SrGa2S4:Ce3+；Y3(Al,Ga)5O12:Tb3+；Ca2Zn4Ti15O36∶Pr3+；CaTiO3:Pr3+；Zn2P2O7:Tm3 +；Ca2P2O7:Eu2+,Y3+；Sr2P2O7:Eu2+,Y3+；Lu2O3:Tb,Sr2Al6O11:Eu2+；Mg2SnO4:Mn2+；CaAl2O4:Ce3+,
Tb3+；Sr4Al14O25:Tb3+；Ca10(PO4)6(F,Cl):Sb,Mn；Sr2MgSi2O7:Eu2+；Sr2CaSi2O7:Eu2+；Zn3
(PO4)2:Mn2+,Ga3+；CaO:Eu3+；Y2O2S:Mg2+,Ti3+；Y2O2S:Sm3+；SrMg2(PO4)2:Eu2+,Gd3+；BaMg2
(PO4)2:Eu2+,Gd3+；Zn2SiO4:Mn,As；KLaF4:Er；CdSiO3：Dy3+；MgSiO3：Eu2+, Mn2+In one kind or many
Kind.
6. LED/light source module as claimed in claim 5, it is characterised in that each constant current unit is connected with sampling unit, constant
The electric current of the respective branch and control signal exported according to sampling unit turns on and off respective branch.
7. a kind of LED/light source module, including sampling unit, it is characterised in that the LED/light source module is included by the first LED moulds
Organize second in series with the first constant current unit tie point in series, the 2nd LED modules and the second constant current unit
Road ... the n-th LED modules and the n-th constant current unit the n-th branch road in series, the sampling unit connect with each constant current unit
Connect, wherein,
The first LED modules, the 2nd LED modules ... comprising LED quantity be respectively 1 in the n-th LED modules2、22、……
n2, corresponding constant current unit electric current be respectively I, 2I ... nI；I be the first constant current unit electric current, wherein n be equal to 4, and
First LED modules are made up of a LED；
2nd LED modules include four LED, and four LED constitute 2 × 2 array, with two groups after two LED series aiding connections
Homopolarity mode in parallel connects and composes the 2nd LED modules；
3rd LED modules include nine LED, and nine LED constitute 3 × 3 array, with three groups after three LED series aiding connections
Homopolarity mode in parallel connects and composes the 3rd LED modules, and the 3rd LED modules anode connection rectification circuit (D1) is born
End is connected to rectification circuit (D1) negative pole by the 3rd constant current unit；
4th LED modules include 16 LED, and 16 LED constitute 4 × 4 array, after four LED series aiding connections
Four groups of homopolarity modes in parallel connect and compose the 4th LED modules；
Wherein, the LED modules are made up of LED array, and the LED in the LED array is the controllable LED of luminescent lifetime.
8. LED/light source module as claimed in claim 7, it is characterised in that
The luminescent lifetime controllable LED contains one or more inorganic and/or luminous organic material combinations, including：CaS：Eu；
CaS:Bi,Tm；ZnS:Tb；CaSrS2:Eu,Dy；SrGa2S4:Dy；Ga2O3:Eu；(Y,Gd)BO3:Eu3+；Zn2SiO4:Mn2+；
YBO3:Tb3+；Y(V,P)O4:Eu3+；SrAl2O4:Eu2+；SrAl2O4:Eu2+,B；SrAl2O4:Eu2+,Dy3+,B；BaAl2O4:Eu2+；
CaAl2O4:Eu2+；Sr3SiO5:Eu2+,Dy3+；BaMgAl10O17:Eu2+,Mn2+；Tb(acac)2(AA)phen；Y2O2S:Eu3+,
Y2SiO5:Tb3+；SrGa2S4:Ce3+；Y3(Al,Ga)5O12:Tb3+；Ca2Zn4Ti15O36∶Pr3+；CaTiO3:Pr3+；Zn2P2O7:Tm3 +；Ca2P2O7:Eu2+,Y3+；Sr2P2O7:Eu2+,Y3+；Lu2O3:Tb,Sr2Al6O11:Eu2+；Mg2SnO4:Mn2+；CaAl2O4:Ce3+,
Tb3+；Sr4Al14O25:Tb3+；Ca10(PO4)6(F,Cl):Sb,Mn；Sr2MgSi2O7:Eu2+；Sr2CaSi2O7:Eu2+；Zn3
(PO4)2:Mn2+,Ga3+；CaO:Eu3+；Y2O2S:Mg2+,Ti3+；Y2O2S:Sm3+；SrMg2(PO4)2:Eu2+,Gd3+；BaMg2
(PO4)2:Eu2+,Gd3+；Zn2SiO4:Mn,As；KLaF4:Er；CdSiO3：Dy3+；MgSiO3：Eu2+, Mn2+In one kind or many
Kind.
9. LED/light source module as claimed in claim 8, it is characterised in that each constant current unit is connected with sampling unit, constant
The electric current of the respective branch and control signal exported according to sampling unit turns on and off respective branch.
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| CN201410830530.9A CN104582160B (en) | 2012-01-10 | 2012-01-10 | A kind of LED/light source module |
| CN201210005714.2A CN103200728B (en) | 2012-01-10 | 2012-01-10 | White-light light emitting diode (LED) luminous device directly driven in constant current by alternating current |
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Citations (3)
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|---|---|---|---|---|
| WO2007055519A1 (en) * | 2005-11-09 | 2007-05-18 | Yuyang Telecom Co., Ltd | Constant current pulse width modulation driving circuit for light emitting diode |
| CN102202441A (en) * | 2010-03-23 | 2011-09-28 | 陕西西电科大华成电子股份有限公司 | Constant-current controller topology circuit powered directly by alternating current power supply for LED lighting lamp |
| CN102209415A (en) * | 2011-05-30 | 2011-10-05 | 桂林源通网络软件有限公司朝阳路分公司 | Light emitting diode (LED) alternating-current direct power supply circuit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007055519A1 (en) * | 2005-11-09 | 2007-05-18 | Yuyang Telecom Co., Ltd | Constant current pulse width modulation driving circuit for light emitting diode |
| CN102202441A (en) * | 2010-03-23 | 2011-09-28 | 陕西西电科大华成电子股份有限公司 | Constant-current controller topology circuit powered directly by alternating current power supply for LED lighting lamp |
| CN102209415A (en) * | 2011-05-30 | 2011-10-05 | 桂林源通网络软件有限公司朝阳路分公司 | Light emitting diode (LED) alternating-current direct power supply circuit |
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