CN103139982A - Alternating current direct-coupled type light-emitting diode lighting apparatus - Google Patents
Alternating current direct-coupled type light-emitting diode lighting apparatus Download PDFInfo
- Publication number
- CN103139982A CN103139982A CN2012104919340A CN201210491934A CN103139982A CN 103139982 A CN103139982 A CN 103139982A CN 2012104919340 A CN2012104919340 A CN 2012104919340A CN 201210491934 A CN201210491934 A CN 201210491934A CN 103139982 A CN103139982 A CN 103139982A
- Authority
- CN
- China
- Prior art keywords
- current
- emitting diode
- circuit
- light
- constant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The present invention relates to an alternating current direct-coupled type light-emitting diode lighting apparatus, and more particularly, to a light-emitting diode lighting apparatus which includes a rectifier diode for converting alternating current power into direct current power, a first light-emitting diode constituted by one or more light-emitting diodes, and a second light-emitting diode constituted by one or more light-emitting diodes, the lighting apparatus including: a first constant current circuit which allows constant current to flow to the first and second light-emitting diodes; a current sensing circuit which senses sensing current flowing to the second light-emitting diode through the first light-emitting diode; a second constant current circuit which supplies second constant current to the first light-emitting diode when the sensing current does not exist; and a third constant current circuit which supplies third constant current to the second light-emitting diode when the sensing current does not exist.
Description
Technical field
The present invention relates to a kind of light emitting diode illuminating apparatus, especially a kind ofly by half-wave or full-wave rectifying circuit, light-emitting diode is directly connected to the interchange direct coupled type light emitting diode illuminating apparatus that AC power is improved luminous efficiency and alleviated the total harmonic distortion phenomenon.
Background technology
As the characteristic of diode, will allow current flowing if applied the voltage more than forward threshold voltage when light-emitting diode is applied forward voltage.The form that one or more light-emitting diode is connected in series, connection in series-parallel connects is connected by the full-wave rectification diode by exchanging the direct coupled type light-emitting diode that directly drives.When applying the power supply of full-wave rectification, light-emitting diode is connected (Turn-on) and is made electric current flow through and begin ray under the voltage more than forward threshold voltage.
Even apply voltage below the light-emitting diode turn-on voltage, light-emitting diode does not have current flowing yet, during take single cycle as benchmark, causes optical efficiency to descend and produces the total harmonic distortion phenomenon because the connection interval of light-emitting diode is shorter.
When increasing the light-emitting diode quantity be connected in series, connecting required voltage can increase a lot and to connect the interval shorter, thereby foregoing problems is further aggravated, and can improve production cost.
In contrast, when reducing the light-emitting diode quantity that is connected in series, although can reduce needed voltage when starting, more fatal problem can occur, that allows light-emitting diode bear overcurrent and shorten its life-span exactly.And the change in voltage of AC power can cause above-mentioned optical efficiency to descend and the overcurrent phenomenon.
Therefore, therefore need to develop the light-emitting diode assembly with following effect, that is, the light-emitting diode assembly that not affected by the change in voltage of power supply, increases optical efficiency, reduces total harmonic distortion, prevents overcurrent, reduces production costs.
Fig. 1 has shown the alternating-current light emitting diode drive circuit that rectifier diode Dr and current regulating resistance Rr and light-emitting diode De are connected in series.Fig. 2 has shown the AC supply voltage V that Fig. 1 applies
ACWith electric current I
AC, commutating voltage Vcc and the electric current I cc waveform that flowed.
As shown in Figure 1, AC power V
ACAllow commutating voltage Vcc be applied to light-emitting diode De through resistance R r by the form that is rectified diode Dr full-wave rectification.Forward threshold voltage sum at the contained basic light-emitting diode of the forward threshold voltage light-emitting diode De of the light-emitting diode De that is connected in series) below, as illustrated in fig. 2 can be at certain hour t1, t3 does not have electric current I cc to flow.Commutating voltage Vcc t2 during greater than forward threshold voltage Vth, electric current I cc begins to flow, the electric current I cc sizableness that flows in the difference of commutating voltage Vcc and forward threshold voltage Vth divided by resistance R r, when therefore input rectifying voltage increased, the electric current of the light-emitting diode of flowing through may be greater than maximum permissible current.
Required voltage during connection, be that forward threshold voltage Vth can be ratio ground increase along with the basic light-emitting diode quantity that is connected in series, thereby make interval shortening of connection of light-emitting diode and allow total harmonic distortion (Total Harmonics Distortion, THD) increase and reduce optical efficiency, can allow electric current over allowable current when reducing forward threshold voltage or increasing supply voltage through light-emitting diode and shorten its life-span and reduce reliability.
Above-mentioned total harmonic distortion worldwide is restricted owing to causing the dry ripple of various electricity, need to use more light-emitting diode for fall when the optical efficiency of light-emitting diode descends, when therefore producing a certain amount of light-emitting device, needed cost also can and then increase.
Fig. 3 has shown the alternating-current light emitting diode drive circuit that improves total harmonic distortion THD, the first light-emitting diode Da and the second light-emitting diode Db of inverse parallel form are connected in series in current regulating resistance R, the capacitor C 1 of improving total harmonic distortion is formed in tie point na, the first light-emitting diode Da between resistance R and the first light-emitting diode Da and the tie point nb between the second light-emitting diode Db, power supply V
ACThere is no to be directly connected to light-emitting diode through resistance under the situation of rectifier diode.
Fig. 4 has shown the voltage V that is applied to light-emitting diode shown in Figure 3
ACWith electric current I
AC, voltage waveform Vcc, the current waveform IDa that flows by the first light-emitting diode Da and the current waveform IDb that flows by the second light-emitting diode Db.
The first light-emitting diode Da does not have the electric current process when forward threshold voltage Vth is following.When forward threshold voltage Vth is above, forward the first light-emitting diode Da2 in positive half period in the first light-emitting diode Da has electric current I Da2 to flow, and reverse the first light-emitting diode Da1 has electric current I Da1 to flow and becomes the first LED current Ida in negative half-cycle.
The second light-emitting diode Db also can be when voltage rises towards positive direction when forward threshold voltage Vth is following allows the charging current process by capacitor C 1, also can allow the discharging current process by capacitor C 1 when rising towards negative direction.
When forward threshold voltage Vth is above, at forward the second light-emitting diode Db2, electric current I Db2 process is arranged by forward the first light-emitting diode Da2 in positive half period, at reverse the second light-emitting diode Db1, electric current I Db1 process is arranged by reverse the first light-emitting diode Da1 in negative half-cycle, thereby become the second LED current Idb.Yet, during voltage drop, do not have the C1 electric current process by electric capacity, do not have electric current process the same as the first light-emitting diode Da when threshold voltage vt h is following.
When supply voltage rises, produce charging and discharging currents by the second light-emitting diode Db in capacitor C 1 and make at power supply V
ACThe electric current I that flows
ACTotal harmonic distortion obtain to a certain degree improvement, but the electric capacity life-span is shorter and need bear high voltage, electric capacity not only price is higher, its size also makes product be difficult to miniaturization.
And, the charging and discharging currents that can only just can be improved the capacitor C 1 of total harmonic distortion on the second light-emitting diode Db of half that is equivalent to light-emitting diode used flows, therefore flow through the electric current of the second light-emitting diode Db greater than the electric current of the first light-emitting diode Da that flows through, can form overcurrent and can't be as the enough glow currents of light-emitting diode supply at the second light-emitting diode Db during take maximum current supply the first light-emitting diode Da.
Therefore, can't allow the maximum permissible current of basic light-emitting diode flow through the first light-emitting diode Da and the second light-emitting diode, thereby make optical efficiency descend.
And, supply voltage V
ACBe subject to the impact of change in voltage and when increasing, the current value of first and second light-emitting diode of flowing through can be greater than the maximum permissible current value, therefore considers change in voltage and can't allow the flow through electric current of light-emitting diode reach maximum permissible value, thereby reduced optical efficiency.
The problem of above-mentioned prior art can arrange as follows, in order to improve total harmonic distortion, even also allow certain source current I below the forward threshold voltage of light-emitting diode
ACFlow, but only can allow electric current flow in the part of light-emitting diode, can't allow the maximum permissible current of indivedual light-emitting diodes flow and make optical efficiency descend; Use high voltage electric capacity in order to reduce total harmonic distortion, but the more expensive change in voltage that increases production cost, supply voltage of, price shorter due to the electric capacity life-span makes the current value of the light-emitting diode of flowing through surpass the maximum permissible current value when causing voltage to raise, and then shortens the life-span of light-emitting diode.
The technical problem to be addressed by invention
In order to address the above problem, the purpose of this invention is to provide and exchange the direct coupled type light emitting diode illuminating apparatus, it can regulate a connection scope in power cycle, allows certain electric current flow through light-emitting diode and be improved total harmonic distortion and optical efficiency below forward threshold voltage.
Another purpose of the present invention is to provide and exchanges the direct coupled type light emitting diode illuminating apparatus, and it consists of a semiconductor device and is minimized production cost.
Solve the technical scheme of problem
In order to solve above-mentioned existing issue and to realize above-mentioned purpose, light emitting diode illuminating apparatus of the present invention comprises the rectifier diode that AC power is converted to DC power supply, the first light-emitting diode that is made of more than one light-emitting diode reaches the second light-emitting diode that is made of more than one light-emitting diode, it is characterized in that comprising: the first constant-current circuit allows certain electric current above-mentioned first, second light-emitting diode of flowing through; Current detection circuit detects the detection electric current that flows to the second light-emitting diode by above-mentioned the first light-emitting diode; The second constant-current circuit when the detection electric current that flows to the second light-emitting diode by above-mentioned the first light-emitting diode does not exist, is first light-emitting diode supply the second continuous current; And the 3rd constant-current circuit, when the detection electric current that flows to the second light-emitting diode by above-mentioned the first light-emitting diode does not exist, be the second light-emitting diode supply the 3rd continuous current.
In the present invention, above-mentioned the first constant-current circuit is connected between rectifier diode and the first light-emitting diode.
In the present invention, above-mentioned the first constant-current circuit is connected between the first light-emitting diode and current detection circuit.
In the present invention, above-mentioned the first constant-current circuit is connected between current detection circuit and the second light-emitting diode.
In the present invention, above-mentioned the first constant-current circuit is connected in series the second light-emitting diode.
In the present invention, above-mentioned the first constant-current circuit is made of a JFET.
In the present invention, above-mentioned the first constant-current circuit is made of CRD Current Regulator Diode.
In the present invention, above-mentioned the first constant-current circuit is made of a JFET and a BJT or the 2nd BJT.
In the present invention, above-mentioned the first constant-current circuit is made of the BCR Bipolar CurrentRegulator that comprises a BJT or the 2nd BJT, the first resistance, the second resistance, the first diode, the second diode.
In the present invention, the 3rd diode of above-mentioned current detection circuit and the 3rd resistance and the 4th resistance are connected in series.
In the present invention, above-mentioned the second constant-current circuit has the current detecting terminal, current input terminal is sub, current output terminal is sub, and also comprise: constant-current circuit is made of the 2nd JFET; Detect electric current current potential translation circuit, detect electric current and keep the 5th certain JFET and consist of with allowing by the 5th BJT of the current potential of change detection electric current; Current detection circuit, by the 3rd JFET that detects electric current with provide the 5th resistance of reference potential to consist of; The output current regulating circuit is made of the 4th JFET of detection output current, the 4th diode, the 6th resistance and the 7th resistance of adjustment reference potential; And the anti-large circuit of output current, consisted of by the 3rd BJT.
In the present invention, above-mentioned output current regulating circuit also comprises the 5th diode and is connected in series with the 4th diode.
In the present invention, the anti-large circuit of above-mentioned output current also comprises the 4th BJT and consists of the Darlington transistor structure with the 3rd BJT.
In the present invention, above-mentioned output current regulating circuit also comprises the 5th diode and is connected in series with the 4th diode, and the anti-large circuit of above-mentioned output current also comprises the 4th BJT and consists of the Darlington transistor structure with the 3rd BJT.
In the present invention, above-mentioned the 3rd constant-current circuit has the current reference of detection terminal, current detecting terminal, current input terminal is sub, current output terminal is sub, and also comprise: constant-current circuit is made of the 2nd JFET; Current detection circuit, by the 3rd JFET that detects electric current with provide the 5th resistance of reference potential to consist of; The output current regulating circuit is made of the 4th JFET of detection output current, the 4th diode, the 6th resistance and the 7th resistance of adjustment reference potential; And the anti-large circuit of output current, consisted of by the 3rd BJT.
In the present invention, above-mentioned output current regulating circuit also comprises the 5th diode and is connected in series with the 4th diode.
In the present invention, the anti-large circuit of above-mentioned output current also comprises the 4th BJT and consists of the Darlington transistor structure with the 3rd BJT.
In the present invention, above-mentioned output current regulating circuit also comprises the 5th diode and is connected in series with the 4th diode, and the anti-large circuit of above-mentioned output current also comprises the 4th BJT and consists of the Darlington transistor structure with the 3rd BJT.
Beneficial effect
As previously mentioned, the present invention can realize current switch (Switch), detect the electric current of the light-emitting diode of flowing through when having applied AC power, if with the next all light-emitting diodes of electric current process that allow, therefore can regulate easily exchanging total harmonic distortion and optical efficiency at the light-emitting diode threshold voltage.
And optical efficiency of the present invention is higher and can prevent the overcurrent that change in voltage causes and be improved the reliability of lighting device, can also improve total harmonic distortion.
Description of drawings
Fig. 1 is the existing embodiment that exchanges with light emitting diode illuminating apparatus.
Fig. 2 is the waveform of electric current shown in Figure 1 and voltage characteristic.
Fig. 3 is existing another embodiment that exchanges with light emitting diode illuminating apparatus.
Fig. 4 is the waveform of electric current shown in Figure 3 and voltage characteristic.
Fig. 5 is the embodiment that the present invention exchanges the direct coupled type light emitting diode illuminating apparatus.
Fig. 6 is the waveform that has shown electric current shown in Figure 5 and voltage characteristic.
Fig. 7 is the circuit diagram that the first constant-current circuit shown in Figure 5, current detection circuit, the second constant-current circuit, the 3rd constant-current circuit are applicable to the applicable result of embodiment.
Fig. 8 a is the different embodiment in position of the first constant-current circuit shown in Figure 5 to Fig. 8 c.
Fig. 9 a is another embodiment of the first constant-current circuit shown in Figure 5 to Fig. 9 e.
Figure 10 a is another embodiment of current detection circuit shown in Figure 5 to Figure 10 b.
Figure 11 a is another embodiment of the second constant-current circuit shown in Figure 5 to Figure 11 c.
Figure 12 a is another embodiment of the 3rd constant-current circuit shown in Figure 5 to Figure 12 c.
Embodiment
Describe preferred embodiment of the present invention in detail below in conjunction with accompanying drawing.
Fig. 5 is the circuit diagram that the present invention exchanges the direct coupled type light emitting diode illuminating apparatus, and Fig. 6 is the waveform that has shown electric current shown in Figure 5 and voltage characteristic.
See also Fig. 5 and Fig. 6, utilize rectifier diode 10 the AC power V that is fed to general house or office
ACBe transformed into DC power supply, that is the power Vcc of rectification have commutating voltage 11 morphological characters of some cycles as illustrated in fig. 6.
The first light-emitting diode 20 that above-mentioned power Vcc voltage is supplied to the first constant-current circuit 100 of being connected in series, be made of more than one light-emitting diode, current detection circuit 200, the second light-emitting diode 21 that is consisted of by more than one light-emitting diode, have glow current when the forward threshold voltage of above-mentioned cascaded structure is above, namely detects electric current 12 processes.When threshold voltage was above, voltage increased the electric current cause and can be according to the physical characteristic of diode exponential function formula ground and increase, and therefore allowed electric current keep the effect of the first constant-current circuit 100 that flows definitely extremely important.
Above-mentioned the first constant-current circuit 100 is made of power input terminal a and the lead-out terminal b of the certain electric current of output, although can utilize resistance to prevent to a certain extent overcurrent when there is no the first constant-current circuit 100, but the overcurrent that mains voltage variations causes can allow the life-span of lighting device significantly shorten, if consist of safely under above-mentioned overcurrent, cause the luminous cycle of supply voltage of single cycle shorten and make optical efficiency descend.
Yet, above-mentioned the first constant-current circuit 100 can not be subjected to the commutating voltage Vcc variable effect ground certain electric current of supply and be increased dramatically the light period in single power supply cycle, can also supply induced current with the maximum current that light-emitting diode is allowed, thereby can allow the life-span of lighting device and optical efficiency be optimized.
At this moment, above-mentioned the first constant-current circuit 100 as Fig. 8 a to as shown in Fig. 8 c with rectifier diode 10, the first light-emitting diode 20, the second light-emitting diode 21 in a certain circuit be connected in series rear use.That is, above-mentioned the first constant-current circuit 100 uses after being connected between some in rectifier diode 10 and the first light-emitting diode 20, the first light-emitting diode 10 and current detection circuit 200, current detection circuit 200 and the second light-emitting diode 21, perhaps is connected in series rear use with the second light-emitting diode 21.As illustrated in fig. 6, when only being moved with detection electric current 12 by commutating voltage 11, the total harmonic distortion phenomenon of various electric clutters can appear causing with respect to the current characteristics of voltage.
As the method that reduces this total harmonic distortion phenomenon, when forward threshold voltage is following, that is to detect the detection current circuit 200 that relies on Fig. 5 when electric current does not exist and the second constant-current circuit 300 be that the first light-emitting diode 20 is when supplying certain electric current (the second continuous current), relying on the 3rd constant-current circuit 400 is that the 3rd continuous current provides extra current 13 for the second light-emitting diode 21 certain electric currents of supply, thereby improves total harmonic distortion, power factor (power factor) and optical efficiency.
At this moment, the magnitude of current is the second continuous current and the 3rd continuous current sum, presents with extra current 13 waveform morphologies in detection electric current 12 front and back of Fig. 6, and operation voltage is in threshold voltage vt h and half interval action of threshold voltage 1/2Vth.
Above-mentioned detection current circuit 200 is made of the sub-c of the current input terminal that is connected to the first light-emitting diode 20, the sub-d of current output terminal that is connected to the second circuit of LED 21, the second detection terminal f that is connected to the first detection terminal e of the second constant-current circuit 300 and is connected to the 3rd constant-current circuit 400, when the electric current that input terminal c and lead-out terminal d flow through, will be at detection terminal e, voltage occurs and disconnects the electric current of the second constant-current circuit 300 and the 3rd constant-current circuit 400 in f.
above-mentioned the second constant-current circuit 300 is by the continuous current input terminal j that is connected to the tie point n2 between the first light-emitting diode 20 and detection current circuit 200, be connected to the continuous current lead-out terminal m of the reference voltage GND of supply voltage, be connected to the sub-k of detection current input terminal of the first detection terminal d that detects current circuit 200 and be connected to the detection current reference terminal l that detects the tie point n3 between current circuit 200 and the second light-emitting diode 21 and consist of, when not existing as the detection electric current, the first light-emitting diode 20 is supplied the circuit of certain electric currents, the voltage vcc of rectification from half left and right of forward threshold voltage till the forward threshold voltage, that is, when not existing, the detection electric current do not supply certain electric currents to the first light-emitting diode 20.
above-mentioned the 3rd constant-current circuit 400 is by the continuous current input terminal g that is connected to commutating voltage Vcc terminal n1, be connected to the continuous current lead-out terminal i that detects the tie point n3 between current circuit 200 and the second light-emitting diode 21 and the sub-h formation of detection current input terminal that is connected to the second detection terminal d that detects current circuit 200, the same with above-mentioned the second constant-current circuit 300, when not existing as the detection electric current, the second light-emitting diode 21 is supplied the circuit of certain electric currents, the voltage vcc of rectification is the second light-emitting diode 21 certain electric currents of supply from half left and right of forward threshold voltage till the detection current flowing.
Fig. 7 is the circuit diagram that the first constant-current circuit shown in Figure 5, current detection circuit, the second constant-current circuit, the 3rd constant-current circuit are applicable to the applicable result of embodiment.
See also Fig. 7, the first constant-current circuit 100a is made of a JFET J1, and gate terminal is connected to source terminal and makes grid voltage necessarily realize continuous current.
The second constant-current circuit 300a comprises: the constant-current circuit 510 that is made of the 2nd JFET J2; Detect electric current and keep the detection electric current current potential translation circuit 550 that the 5th certain JFET J5 consists of with allowing by the 5th BJT Q5 of the current potential of change detection electric current; The current detection circuit 520 that is consisted of by the 3rd JFET J3 that detects electric current and the 5th resistance R 5 that the reference potential of the 3rd JFET J3 is provided; By the 4th JFET J4 that detects output current, regulate above-mentioned the 4th JFET J4 reference potential the 4th diode D4, the 6th resistance R 6 and detect the output current regulating circuit 530 that the 7th resistance R 7 of the second continuous current consists of; Prevent large circuit 540 by the output current that the 3rd BJT Q3 consists of.
The 3rd constant-current circuit 400a comprises: the constant-current circuit 510 that is made of the 2nd JFET J2; The current detection circuit 520 that is consisted of by the 3rd JFET J3 that detects electric current and the 5th resistance R 5 that the reference potential of the 3rd JFET J3 is provided; By the 4th JFET J4 that detects output current, regulate above-mentioned the 4th JFET J4 reference potential the 4th diode D4, the 6th resistance R 6 and detect the output current regulating circuit 530 that the 7th resistance R 7 of the 3rd continuous current consists of; Prevent large circuit 540 by the output current that the 3rd BJTQ3 consists of.
To Fig. 7, the elemental motion principle is described below in conjunction with Fig. 5, commutating voltage Vcc is during less than half threshold voltage 1/2Vth, and the first constant-current circuit 100, the second constant-current circuit 300 and the 3rd constant-current circuit 400 are not taked action, so LED does not take action yet.
Commutating voltage Vcc is during greater than half threshold voltage 1/2Vth and less than threshold voltage vt h, be subject to the second constant-current circuit 300,300a and the 3rd constant-current circuit 400, the restriction of 400a and allow extra current 13 flow, commutating voltage Vcc is during greater than threshold voltage vt h, is subject to the restriction of the first constant-current circuit 100,100a and allows and detect electric current 12 and flow.
Commutating voltage Vcc is greater than threshold voltage vt h and greater than the second constant- current circuit 300, and 300a and the 3rd constant-current circuit 400 during the 400a sum, become from extra current 13 flow transitions to detecting the mobile change point of electric current 12.
Fig. 9 a is the embodiment of the first constant-current circuit 100a shown in Figure 7, and the first constant-current circuit 100b is realized by CRD Current Regulator Diode.
Fig. 9 b is another embodiment of the first constant-current circuit 100a shown in Figure 7, and the first constant-current circuit 100c is made of a JFET J1 and a PNP BJT Q1, by a PNP BJTQ1, the electric current of the above-mentioned JFET J1 that flows through is amplified rear realization.
Fig. 9 c is another embodiment of the first constant-current circuit 100a shown in Figure 7, and the first constant-current circuit 100d is made of a JFET J1 and the 2nd NPN BJT Q2, by the 2nd NPN BJTQ2, the electric current of the above-mentioned JFET J1 that flows through is amplified rear realization.
Fig. 9 d is another embodiment of the first constant-current circuit 100a shown in Figure 7, the first constant-current circuit 100e is by comprising the first resistance R 1, the second resistance R 2, the first diode D1, the BCR Bipolar Current Regulator of the second diode D2 and a PNP BJT Q1 consists of, above-mentioned the first diode D1 and the second diode D2 are connected in series and form certain threshold voltage and in order to allow the flow through electric current of the first resistance R 1 keep and flow definitely and amplified by a PNP BJT Q1, the second 2 of resistance R are that the base terminal change voltage of a PNP BJT Q1 is formed continuous current ground action.
Fig. 9 e is another embodiment of the first constant-current circuit 100a shown in Figure 7, the first constant-current circuit 100f is made of the BCR that comprises the first resistance R 1, the second resistance R 2, the first diode D1, the second diode D2 and the 2nd NPN BJT Q2, above-mentioned the first diode D1 and the second diode D2 are connected in series and form certain threshold voltage and in order to allow the flow through electric current of the first resistance R 1 keep and flow definitely and amplified by the 2nd NPN BJT Q2, and the second 2 of resistance R are that the base terminal of the 2nd NPN BJT Q2 changes voltage and formed continuous current ground and move.
Figure 10 a is the embodiment of current detection circuit 200a shown in Figure 7, the 3rd resistance R 3 of current detection circuit 200b, the 3rd diode D3 and the 4th resistance R 4 are connected in series, when the electric current that is input to input terminal c flows to lead-out terminal d by the 3rd resistance R 3, the 3rd diode D3 and the 4th resistance R 4, allow the first detection terminal e and the second detection terminal f formation voltage.
Figure 10 b is another embodiment of current detection circuit 200a shown in Figure 7, the 3rd diode D3 of current detection circuit 200c, the 3rd resistance R 3 and the 4th resistance R 4 are connected in series, when the electric current that is input to input terminal c flows to lead-out terminal d by the 3rd resistance R 3, the 3rd diode D3 and the 4th resistance R 4, allow the first detection terminal e and the second detection terminal f formation voltage.
Figure 11 a is the embodiment of the second constant-current circuit 300a shown in Figure 7, and in the second constant-current circuit 300b, the anti-large circuit 541 of output current is consisted of Darlington transistor Darlington structure and increased current amplification degree by the 4th BJT and the 3rd BJT Q3.
Figure 11 b is another embodiment of the second constant-current circuit 300a shown in Figure 7, and in the second constant-current circuit 300c, output current regulating circuit 531 is connected in series the 4th diode D4 and the 5th diode D5 and changes the adjusting current potential.
Figure 11 c is another embodiment of the second constant-current circuit 300a shown in Figure 7, in the second constant-current circuit 300d, the anti-large circuit 541 of output current is consisted of the Darlington transistor structure and is increased current amplification degree by the 4th BJT and the 3rd BJT Q3, and 531 of output current regulating circuits are connected in series the 4th diode D4 and the 5th diode D5 and change the adjusting current potential.
Figure 12 a is the embodiment of the 3rd constant-current circuit 400a shown in Figure 7, and in the 3rd constant-current circuit 400b, the anti-large circuit 541 of output current is consisted of the Darlington transistor structure and increased current amplification degree by the 4th BJT Q3 and the 3rd BJT Q3.
Figure 12 b is another embodiment of the 3rd constant-current circuit 400a shown in Figure 7, and in the 3rd constant-current circuit 400c, output current regulating circuit 531 allows the 4th diode D4 and the 5th diode D5 be connected in series and changes the adjusting current potential.
Figure 12 c is another embodiment of the 3rd constant-current circuit 400a shown in Figure 7, in the 3rd constant-current circuit 400d, the anti-large circuit 541 of output current is consisted of the Darlington transistor structure and is increased current amplification degree by BJT Q3 and the 3rd BJT Q3, and output current regulating circuit 531 allows the 4th diode D4 and the 5th diode D5 be connected in series and changes the adjusting current potential.
Preamble is described preferred embodiment of the present invention with embodiment by reference to the accompanying drawings, can realize various distortion and modification in technological thought category of the present invention, this is very obvious to those skilled in the art, therefore must not therefore be defined in this to interest field of the present invention, should determine according to claims and impartial scope thereof.
The explanation of＜main pictorial symbolization 〉
10: rectifier diode 11: commutating voltage
12: detect electric current 13: extra current
21: the second light-emitting diodes of 20: the first light-emitting diodes
Constant-current circuit 200 in 100: the first: current detection circuit
400: the three constant-current circuits of 300: the second constant-current circuits.
Claims (18)
1. one kind exchanges the direct coupled type light emitting diode illuminating apparatus, this light emitting diode illuminating apparatus comprise AC power convert the rectifier diode of DC power supply to, the first light-emitting diode of being consisted of by more than one light-emitting diode and by the second light-emitting diode that more than one light-emitting diode consists of, it is characterized in that comprising:
The first constant-current circuit allows certain electric current above-mentioned first, second light-emitting diode of flowing through;
Current detection circuit detects the detection electric current that flows to the second light-emitting diode by above-mentioned the first light-emitting diode;
The second constant-current circuit when the detection electric current that flows to the second light-emitting diode by above-mentioned the first light-emitting diode does not exist, is first light-emitting diode supply the second continuous current; And
The 3rd constant-current circuit when the detection electric current that flows to the second light-emitting diode by above-mentioned the first light-emitting diode does not exist, is the second light-emitting diode supply the 3rd continuous current.
2. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
Above-mentioned the first constant-current circuit is connected between rectifier diode and the first light-emitting diode.
3. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
Above-mentioned the first constant-current circuit is connected between the first light-emitting diode and current detection circuit.
4. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
Above-mentioned the first constant-current circuit is connected between current detection circuit and the second light-emitting diode.
5. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
Above-mentioned the first constant-current circuit is connected in series the second light-emitting diode.
6. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
Above-mentioned the first constant-current circuit is made of a JFET.
7. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
Above-mentioned the first constant-current circuit is made of CRD (Current Regulator Diode).
8. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
Above-mentioned the first constant-current circuit is made of a JFET and a BJT or the 2nd BJT.
9. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
Above-mentioned the first constant-current circuit is made of the BCR that comprises a BJT or the 2nd BJT, the first resistance, the second resistance, the first diode, the second diode (Bipolar Current Regulator).
10. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1, is characterized in that,
The 3rd diode of above-mentioned current detection circuit, the 3rd resistance and the 4th resistance are connected in series.
11. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1 is characterized in that,
Have current detecting terminal, current input terminal, sub above-mentioned the second constant-current circuit of current output terminal comprises:
Constant-current circuit is made of the 2nd JFET;
Detect electric current current potential translation circuit, detect electric current and keep the 5th certain JFET and consist of with allowing by the 5th BJT of the current potential of change detection electric current;
Current detection circuit, by the 3rd JFET that detects electric current with provide the 5th resistance of reference potential to consist of;
The output current regulating circuit is made of the 4th JFET of detection output current, the 4th diode, the 6th resistance and the 7th resistance of adjustment reference potential; And
Output current is prevented large circuit, is made of the 3rd BJT.
12. interchange direct coupled type light emitting diode illuminating apparatus according to claim 11 is characterized in that,
Above-mentioned output current regulating circuit also comprises the 5th diode and is connected in series with the 4th diode.
13. interchange direct coupled type light emitting diode illuminating apparatus according to claim 11 is characterized in that,
The anti-large circuit of above-mentioned output current also comprises the 4th BJT and consists of the Darlington transistor structure with the 3rd BJT.
14. interchange direct coupled type light emitting diode illuminating apparatus according to claim 11 is characterized in that,
Above-mentioned output current regulating circuit also comprises the 5th diode and is connected in series with the 4th diode, and the anti-large circuit of above-mentioned output current also comprises the 4th BJT and consists of the Darlington transistor structure with the 3rd BJT.
15. interchange direct coupled type light emitting diode illuminating apparatus according to claim 1 is characterized in that,
Have and detect current reference terminal, current detecting terminal, current input terminal, sub above-mentioned the 3rd constant-current circuit of current output terminal and comprise:
Constant-current circuit is made of the 2nd JFET;
Current detection circuit, by the 3rd JFET that detects electric current with provide the 5th resistance of reference potential to consist of;
The output current regulating circuit is made of the 4th JFET of detection output current, the 4th diode, the 6th resistance and the 7th resistance of adjustment reference potential; And
Output current is prevented large circuit, is made of the 3rd BJT.
16. interchange direct coupled type light emitting diode illuminating apparatus according to claim 15 is characterized in that,
Above-mentioned output current regulating circuit also comprises the 5th diode and is connected in series with the 4th diode.
17. interchange direct coupled type light emitting diode illuminating apparatus according to claim 15 is characterized in that,
The anti-large circuit of above-mentioned output current also comprises the 4th BJT and consists of the Darlington transistor structure with the 3rd BJT.
18. interchange direct coupled type light emitting diode illuminating apparatus according to claim 15 is characterized in that,
Above-mentioned output current regulating circuit also comprises the 5th diode and is connected in series with the 4th diode, and the anti-large circuit of above-mentioned output current also comprises the 4th BJT and consists of the Darlington transistor structure with the 3rd BJT.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110128716A KR101128680B1 (en) | 2011-12-05 | 2011-12-05 | Ac direct coupled led lighting device |
| KR10-2011-0128716 | 2011-12-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103139982A true CN103139982A (en) | 2013-06-05 |
| CN103139982B CN103139982B (en) | 2015-05-20 |
Family
ID=46142563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210491934.0A Active CN103139982B (en) | 2011-12-05 | 2012-11-27 | Alternating current direct-coupled type light-emitting diode lighting apparatus |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101128680B1 (en) |
| CN (1) | CN103139982B (en) |
| WO (1) | WO2013085158A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104284488A (en) * | 2014-09-28 | 2015-01-14 | 大连工业大学 | Method for designing alternating-current light-emitting diode circuit |
| US9113523B2 (en) | 2013-05-15 | 2015-08-18 | Iml International | Light-emitting diode lighting device having multiple driving stages |
| CN105792443A (en) * | 2016-05-06 | 2016-07-20 | 熊晓丹 | Power supply circuit for driving IC in LED power source |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101298486B1 (en) | 2012-05-31 | 2013-08-21 | 주식회사 실리콘웍스 | Led lighting system and control circuit thereof |
| KR101478782B1 (en) * | 2012-10-30 | 2015-01-02 | 한국전기연구원 | LED Driving Circuit for AC Driving and Dimming Based on Constant Current of Sine Wave |
| CN103096592B (en) * | 2013-01-07 | 2015-01-28 | 浙江工业大学 | High voltage light-emitting diode (LED) lamp bead driving power supply controlled by sectional indentation type current |
| CN103096591B (en) * | 2013-01-07 | 2015-01-28 | 浙江工业大学 | High voltage light-emitting diode (LED) lamp bead driving power supply controlled by sectional type negative sinusoidal current |
| KR101301087B1 (en) * | 2013-03-06 | 2013-08-28 | (주) 알에프세미 | Apparatus for driving light emitting diode |
| CN106793253B (en) * | 2016-11-24 | 2018-12-28 | 深圳市明微电子股份有限公司 | A kind of LED linear constant-current drive circuit and LED light device |
| KR102003365B1 (en) | 2017-05-24 | 2019-07-24 | 그린칩 주식회사 | Driving apparatus for light emitting diode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201467510U (en) * | 2009-07-08 | 2010-05-12 | 阎智广 | AC temperature-control constant-current multi-section voltage-limiting protective LED lighting lamp circuit |
| CN101730350A (en) * | 2008-10-13 | 2010-06-09 | 云辰电子开发股份有限公司 | Illuminating device starting control method |
| CN201752150U (en) * | 2010-06-07 | 2011-02-23 | 上海合亚经贸有限公司 | LED (light-emitting diode) light non-luminous decay controlled device |
| WO2011052834A1 (en) * | 2009-10-26 | 2011-05-05 | (주)에어텍시스템 | Constant-current-drive led module device |
| KR20110104337A (en) * | 2010-03-16 | 2011-09-22 | 주식회사 에어텍시스템 | Unidirectional lighting emitting diode module device with reduction to harmonics distortion |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990084247A (en) * | 1998-05-02 | 1999-12-06 | 이종규 | AC power LED drive circuit |
| JP2001215913A (en) * | 2000-02-04 | 2001-08-10 | Toko Inc | Lighting circuit |
| KR101047027B1 (en) * | 2009-10-26 | 2011-07-06 | 주식회사 에어텍시스템 | Constant Current Driving Unidirectional LED Module Device |
| KR101027717B1 (en) | 2010-07-22 | 2011-04-12 | 주식회사 에어텍시스템 | Dimming assitant apparatus for ac drived light emitted device and dimming apparatus using it |
-
2011
- 2011-12-05 KR KR1020110128716A patent/KR101128680B1/en active IP Right Grant
-
2012
- 2012-11-14 WO PCT/KR2012/009598 patent/WO2013085158A1/en active Application Filing
- 2012-11-27 CN CN201210491934.0A patent/CN103139982B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101730350A (en) * | 2008-10-13 | 2010-06-09 | 云辰电子开发股份有限公司 | Illuminating device starting control method |
| CN201467510U (en) * | 2009-07-08 | 2010-05-12 | 阎智广 | AC temperature-control constant-current multi-section voltage-limiting protective LED lighting lamp circuit |
| WO2011052834A1 (en) * | 2009-10-26 | 2011-05-05 | (주)에어텍시스템 | Constant-current-drive led module device |
| KR20110104337A (en) * | 2010-03-16 | 2011-09-22 | 주식회사 에어텍시스템 | Unidirectional lighting emitting diode module device with reduction to harmonics distortion |
| CN201752150U (en) * | 2010-06-07 | 2011-02-23 | 上海合亚经贸有限公司 | LED (light-emitting diode) light non-luminous decay controlled device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9113523B2 (en) | 2013-05-15 | 2015-08-18 | Iml International | Light-emitting diode lighting device having multiple driving stages |
| CN104284488A (en) * | 2014-09-28 | 2015-01-14 | 大连工业大学 | Method for designing alternating-current light-emitting diode circuit |
| CN105792443A (en) * | 2016-05-06 | 2016-07-20 | 熊晓丹 | Power supply circuit for driving IC in LED power source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103139982B (en) | 2015-05-20 |
| WO2013085158A1 (en) | 2013-06-13 |
| KR101128680B1 (en) | 2012-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103139982B (en) | Alternating current direct-coupled type light-emitting diode lighting apparatus | |
| CN206212329U (en) | A kind of LED drive circuit | |
| CN103841719B (en) | Driving circuit applied to light emitting diode | |
| CN203590536U (en) | LED driving device with open circuit protection and color temperature and brightness adjusting functions | |
| CN106851892B (en) | The control circuit of light-emitting component | |
| CN202721866U (en) | New type driving circuit which is compatible with LED lamp tube | |
| US20150022100A1 (en) | LED driving device and control method | |
| CN104904314B (en) | Reduce the LED driver circuit of Observable optical flicker using flyback converter by reducing rectification AC power network ripple | |
| CN106576408B (en) | Synchronous mode multichannel light emitting diode drive device | |
| CN106455227A (en) | LED linear constant current control circuit and LED luminous device | |
| CN104427714B (en) | Driving Circuit for Driving LED Load | |
| CN103458557A (en) | LED drive control circuit and LED lamp | |
| CN103152895A (en) | Circuit for driving LEDs (light-emitting diode) by directly using alternating current | |
| CN202799281U (en) | Control device for small LED strings | |
| CN109462917B (en) | Efficient closed-loop linear LED constant current control circuit and control method | |
| CN106304459A (en) | Light emitting diode illuminating apparatus | |
| CN203167384U (en) | AC directly driving LED lamp current control circuit | |
| CN202425146U (en) | Drive circuit of LED (Light-Emitting Diode) lighting device | |
| CN202475884U (en) | Light emitting diode (LED) driving device | |
| CN104010425B (en) | Transformer-free power supply of light-emitting diode for illumination | |
| CN209627751U (en) | A kind of linear LED constant-current control circuit of efficient closed loop | |
| CN206948663U (en) | A kind of multiple-channel output constant current driver circuit for LED | |
| CN105554951A (en) | Current-constant voltage-constant light emitting diode (LED) driving circuit | |
| CN103731953A (en) | Boost converter of driver circuit with thermal compensation | |
| CN202818711U (en) | AC-DC isolation primary side control LED constant current power supply circuit capable of simulating dimming |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |