CN103687176A - Linear LED driver circuit using fractional divider to regulate voltage - Google Patents
Linear LED driver circuit using fractional divider to regulate voltage Download PDFInfo
- Publication number
- CN103687176A CN103687176A CN201310219121.0A CN201310219121A CN103687176A CN 103687176 A CN103687176 A CN 103687176A CN 201310219121 A CN201310219121 A CN 201310219121A CN 103687176 A CN103687176 A CN 103687176A
- Authority
- CN
- China
- Prior art keywords
- voltage
- series
- current
- led
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 230000033228 biological regulation Effects 0.000 claims description 25
- 230000006641 stabilisation Effects 0.000 claims description 13
- 238000011105 stabilization Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention relates to a linear LED drive circuit for regulating voltage by using a fractional voltage divider, which comprises a power supply loop consisting of a rectifying unit, an LED module and a constant current controller, a serial-parallel fractional voltage divider connected to the LED module and a voltage division controller connected to the serial-parallel fractional voltage divider; the series-parallel fractional voltage divider comprises a voltage dividing capacitor; the voltage-dividing capacitor is connected in series with the LED module, and is connected between at least one LED unit and a grounding end of the LED module when discharging; the voltage on the voltage-dividing capacitor is equal to the voltage on the two ends of the LED unit; therefore, the invention can determine the voltage value on the voltage-dividing capacitor by setting the number of the LED units which are connected to the constant current controller in series, and reduce the input voltage to any fractional voltage-dividing value which is suitable for the number of the LED strings, so that the invention can be suitable for different voltages.
Description
Technical field
The present invention is a kind of linear LED drive circuit, and espespecially a kind of mark voltage divider that uses is with the linear LED drive circuit of regulation voltage.
Background technology
Alternating current is modal electric power transmission & distribution mode on the market at present, and its reason is by exchange way transferring electric power more than coming more efficiently by direct current mode transferring electric power; And its standard of voltage that at present Utilities Electric Co. sends the AC power of each family to is 110 volts or 220 volts, but in fact the voltage of the received AC power of user not as above-mentioned ideal, have on the contrary a little error range; In general, roughly drop on+-10% scope of above-mentioned error range; For instance, if the effective value of the voltage of AC power is 110 volts, the voltage of the AC power of 99 volts to 122 volts is all permissible error range.
Light-emitting diode (LED; Light Emitting Diode) be current common lighting apparatus on the market, compared to conventional incandescent bulb, have more high-luminous-efficiency, low power consumption and oligosaprobic characteristic; Yet because light-emitting diode itself only can one-way conduction, therefore difficult giving used the alternating current being widely used at present; For this reason, industry is just developed a kind of linear LED drive circuit; Please refer to shown in Figure 10, this linearity LED drive circuit includes:
One rectification unit 50, is connected to an AC power AC/IN, and above-mentioned AC power AC/IN is converted to a Voltage pulsating direct-current supply;
One LED unit 51, is connected in series this rectification unit 50, and includes a plurality of LED light sources; And
Certain current controller 52, is connected in series this LED unit 51, and forms an electric power loop; Wherein this is determined the flow through electric current of this LED unit 51 of current controller 52 order and is fixed as certain value.
From said structure, existing linear LED drive circuit is converted to above-mentioned AC power AC/IN after Voltage pulsating direct-current supply in its rectification unit 50, for fear of the AC power AC/IN spread of voltage because of Utilities Electric Co., and cause like products to produce different brightness; Therefore existing linear LED drive circuit is just determined current controller 52 fixed flow through the electric current of this LED unit 51 by this, reach by this and make this LED unit stablize shinny object; Therefore, when the voltage drop of above-mentioned AC power, this determines the voltage that current controller 52 reduces its two ends then, and when the voltage of above-mentioned AC power AC/IN rises, this determines the voltage that current controller 52 improves its two ends then again; The voltage at these 51 two ends, LED unit is consistent at any time, and then reaches fixed flow through the effect of the electric current of this LED unit 51.
Yet, because the permissible error range of voltage of aforementioned AC power AC/IN is 99 volts to 122 volts; Therefore, linear LED drive circuit manufacturer just must design different linear LED drive circuits for different voltage ranges, and then causes on the cost of manufacturer and storage pressure; Therefore be necessary to propose preferably solution for said circumstances.
Summary of the invention
Because above-mentioned existing linear LED drive circuit can be because of the difference of its voltage range of AC power height, and there is applicable problem; Therefore main purpose of the present invention provides a kind of mark voltage divider that uses with the linear LED drive circuit of regulation voltage.
For addressing the above problem, the invention discloses a kind of mark voltage divider that uses with the linear LED drive circuit of regulation voltage, include:
One rectification unit, is connected to an AC power, and above-mentioned AC power is converted to a Voltage pulsating direct-current supply;
One LED module, is connected in series this rectification unit, and includes the LED unit of a plurality of serial connections;
Certain current controller, is connected in series between this LED module and an earth terminal, and forms an electric power loop; Wherein this is determined the flow through electric current of this electric power loop of current controller order and is fixed as certain value;
One series-parallel mark voltage divider, is connected between this rectification unit and this LED module, and has series model and paralleling model, and includes a dividing potential drop electric capacity; Wherein this series model makes this dividing potential drop capacitance series between this rectification unit and this LED module, and this paralleling model makes this dividing potential drop electric capacity be connected to wherein between at least one LED unit and this earth terminal; And
One minute pressure controller, inside has a voltage safety value, and is connected to this rectification unit and this series-parallel mark voltage divider; Wherein this minute pressure controller detects the magnitude of voltage of the Voltage pulsating direct-current supply that this rectification unit exports; And when the magnitude of voltage of above-mentioned Voltage pulsating direct-current supply surpasses this voltage safety value, controlling this series-parallel mark voltage divider is series model; Otherwise controlling this series-parallel mark voltage divider is paralleling model.
For addressing the above problem, the invention also discloses a kind of mark voltage divider that uses with the linear LED drive circuit of regulation voltage, include:
One rectification unit, is connected to an AC power, and above-mentioned AC power is converted to a Voltage pulsating direct-current supply;
One LED module, is connected in series this rectification unit, and includes the LED unit of a plurality of serial connections;
Certain current controller, is connected in series between this LED module and an earth terminal, and forms an electric power loop; Wherein this is determined the flow through electric current of this electric power loop of current controller order and is fixed as certain value;
One series-parallel mark voltage divider, is connected to this LED module and this is determined between current controller, and has series model and paralleling model, and includes a dividing potential drop electric capacity; Wherein this series model is used for making this dividing potential drop capacitance series to determine between current controller in this LED module and this, and this paralleling model makes this dividing potential drop electric capacity be connected to wherein between at least one LED unit and this earth terminal; And
One minute pressure controller, inside has a voltage safety value, and is connected to this rectification unit and this series-parallel mark voltage divider; Wherein this minute pressure controller detects the magnitude of voltage of the Voltage pulsating direct-current supply that this rectification unit exports; And when the magnitude of voltage of above-mentioned Voltage pulsating direct-current supply surpasses this voltage safety value, controlling this series-parallel mark voltage divider is series model; Otherwise controlling this series-parallel mark voltage divider is paralleling model.
From said structure, the present invention by series model make this dividing potential drop electric capacity by the magnitude of voltage dividing potential drop some of this Voltage pulsating direct-current supply to this dividing potential drop electric capacity, to reduce this, determine the voltage on current controller two ends, by paralleling model, make this dividing potential drop electric capacity discharge at least one LED unit again; Because this dividing potential drop electric capacity its voltage when the paralleling model is same as the voltage of at least one LED unit; Therefore,, when this dividing potential drop electric capacity is connected in series on this LED module time again, above-mentioned Voltage pulsating direct-current supply dividing potential drop some is equal to the voltage of this at least one LED unit to the magnitude of voltage on this dividing potential drop electric capacity; Therefore, the present invention can be by the quantity of setting the above-mentioned LED unit being connected with dividing potential drop electric capacity, and then determine the magnitude of voltage on this dividing potential drop electric capacity, so that the present invention can be applicable to different voltage; And make the manufacturer of aforementioned AC LED drive circuit design different linear LED drive circuits for different voltage ranges; Only need to design an identical circuit, and according to the different above-mentioned serial connection of requirements set to this quantity of determining the LED unit of current controller, can make the present invention be applied to the voltage range of different AC power; Use on the cost that solves manufacturer and storage pressure.
Accompanying drawing explanation
Fig. 1 is that the present invention uses mark voltage divider with the circuit diagram of the first embodiment of the linear LED drive circuit of regulation voltage.
Fig. 2 is the circuit diagram of second embodiment of the invention.
Fig. 3 is the circuit diagram of third embodiment of the invention.
Fig. 4 is the circuit diagram of fourth embodiment of the invention.
Fig. 5 is that the present invention uses mark voltage divider with the circuit diagram of the 5th embodiment of the linear LED drive circuit of regulation voltage.
Fig. 6 is the circuit diagram of sixth embodiment of the invention.
Fig. 7 is the circuit diagram of seventh embodiment of the invention.
Fig. 8 is the mode chart of the electric current and voltage of its each element of seventh embodiment of the invention.
Fig. 9 is that the present invention uses mark voltage divider with the oscillogram of the pulsating dc voltage of the linear LED drive circuit of regulation voltage.
Figure 10 is the circuit diagram of existing linear LED drive circuit.
Wherein, Reference numeral:
10 rectification unit 11 LED modules
Current controller is determined in 12 LED unit 13
14 voltage-controlled transistor 15 current detecting units
16 current stabilization control unit 17 low-frequency filters
20 series-parallel mark voltage divider 21 dividing potential drop electric capacity
22 control diode 23 selector switches
24 switching diode 25 storage capacitors
26 ground connection diode 30 minutes pressure controllers
The series-parallel mark voltage divider of 31 multiplexer 40
41 dividing potential drop electric capacity 42 are controlled diode
43 selector switch 44 switching diodes
45 pass-transistor 46 bypass resistances
47 select diode 50 rectification units
Current controller is determined in 51 LED unit 52
Embodiment
Please refer to shown in Fig. 1, for the present invention uses mark voltage divider with the first embodiment of the linear LED drive circuit of regulation voltage, include:
One rectification unit 10, is connected to an AC power AC/IN, and above-mentioned AC power AC/IN is converted to a Voltage pulsating direct-current supply; In the present embodiment, this rectification unit 10 is a full-wave rectifier;
One LED module 11, is connected in series this rectification unit 10, and includes the LED unit 12 of a plurality of serial connections; In the present embodiment, above-mentioned LED module 11 includes two LED unit 12, and each LED unit 12 includes many LED light sources;
Certain current controller 13, is connected in series between this LED module 11 and an earth terminal, and forms an electric power loop; Wherein this is determined the flow through electric current of this electric power loop of current controller 13 order and is fixed as certain value; In the present embodiment, this is determined the current detecting unit 15 and that current controller 13 includes a voltage-controlled transistor 14, this voltage-controlled transistor 14 of serial connection and is electrically connected to the current stabilization control unit 16 of this voltage-controlled transistor 14 and this current detecting unit 15; Wherein this voltage-controlled transistor 14 is connected in series to this LED module 11 with this current detecting unit 15, and forms above-mentioned electric power loop; And this current detecting unit 15 detects the electric current of this electric power loop of flowing through, and by a low-frequency filter 17, detected current signal is sent to this current stabilization control unit 16; This current stabilization control unit 16, according to above-mentioned current signal by the flow through electric current of this electric power loop of these voltage-controlled transistor 14 FEEDBACK CONTROL, maintains the current stabilization of this electric power loop again;
One series-parallel mark voltage divider 20, is connected between this rectification unit 10 and this LED module 11, and has series model and paralleling model, and includes a dividing potential drop electric capacity 21; Wherein this series model makes this dividing potential drop electric capacity 21 be serially connected with between this rectification unit 10 and this LED module 11, and this paralleling model makes this dividing potential drop electric capacity 21 be connected to wherein between at least one LED unit 12 and this earth terminal; In the present embodiment, this dividing potential drop electric capacity 21 has anode and negative terminal; This series-parallel mark voltage divider 20, further includes a control diode 22, a selector switch 23 and a switching diode 24 again, wherein:
This controls diode 22 serial connections to this dividing potential drop electric capacity 21, and includes an anode and a negative electrode; Wherein this controls the anodic bonding of diode 22 to the negative terminal of this dividing potential drop electric capacity 21;
One end of this selector switch 23 is connected to this rectification unit 10, and the other end is connected to wherein between two LED unit 12;
This switching diode 24 includes an anode and a negative electrode, and its negative electrode is connected between this dividing potential drop electric capacity 21 and this control diode 22, and its anodic bonding is to this earth terminal again; And
Within one minute, pressure controller 30, inside have a voltage safety value VF, and are connected to this rectification unit 10 and this series-parallel mark voltage divider 20; Wherein this minute pressure controller 30 detects the magnitude of voltage Vdc of the Voltage pulsating direct-current supply that these rectification units 10 export; And when the magnitude of voltage Vdc of above-mentioned Voltage pulsating direct-current supply surpasses this voltage safety value VF, controlling this series-parallel mark voltage divider 20 is series model; Otherwise controlling this series-parallel mark voltage divider 20 is paralleling model; Please refer to shown in Fig. 1, in the present embodiment, within this minute, pressure controller 30 is connected to this selector switch 23, and when the magnitude of voltage Vdc of above-mentioned Voltage pulsating direct-current supply is greater than voltage safety value VF, controls this selector switch 23 and present cut-off state, otherwise present conducting state.
From said structure, the first embodiment of the present invention detects the magnitude of voltage Vdc of the Voltage pulsating direct-current supply that these rectification units 10 export by this minute pressure controller 30, and then determines that this series-parallel mark voltage divider 20 is series model or paralleling model; When this series-parallel mark voltage divider 20 is series model, make these dividing potential drop electric capacity 21 serial connections to this LED module 11, make the magnitude of voltage Vdc dividing potential drop some of above-mentioned Voltage pulsating direct-current supply to this dividing potential drop electric capacity 21, to reduce this, determine the voltage on current controller 13 two ends, and this dividing potential drop electric capacity 21 is charged in this simultaneously; Moreover, when this series-parallel mark voltage divider 20 is paralleling model, makes this dividing potential drop electric capacity 21 be connected to wherein between at least one LED unit 12 and this earth terminal, and make 21 pairs of these at least one LED unit of this dividing potential drop electric capacity discharge, use stabling current is provided.
Because above-mentioned dividing potential drop electric capacity 21 its voltage system when the paralleling model is same as the voltage of at least one LED unit 12; Therefore,, when this dividing potential drop electric capacity 21 is connected in series on this LED module 20 time again, above-mentioned Voltage pulsating direct-current supply dividing potential drop some is equal to the voltage of at least one LED unit 12 to the magnitude of voltage on this dividing potential drop electric capacity 21; Therefore the present invention can be by the quantity of setting the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 21, and then determine the magnitude of voltage on this dividing potential drop electric capacity 21, so that the present invention can be applicable to different voltage.
Please refer to shown in Fig. 2, is second embodiment of the invention, and its structure is roughly identical with the first embodiment; Its difference is in the present embodiment, and above-mentioned LED module 11 includes three LED unit 12; And this use mark voltage divider further includes with the linear LED drive circuit of regulation voltage:
One multiplexer 31, is connected to this minute pressure controller 30, and is serially connected with between this selector switch 23 and this LED module 11; Wherein this multiplexer 31 is connected between each LED unit 12, and by the control of this minute pressure controller 30, this selector switch 23 is optionally connected to wherein between two LED unit 12.
Because this second embodiment is further serially connected with a multiplexer 31 between this selector switch 23 and each LED unit 12; Therefore, the present invention can optionally be connected to wantonly two LED unit 12 Zhi Jian ﹔ therefore user can be by the switching of this multiplexer 31 by this multiplexer 31, set the quantity of the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 21, and then determine the magnitude of voltage on this dividing potential drop electric capacity 21.
Please refer to shown in Fig. 3, is the 3rd preferred embodiment of the present invention, and its structure is roughly identical with the first embodiment; Its difference is in the linear LED drive circuit with regulation voltage in this use mark voltage divider and further includes:
One storage capacitors 25, its one end is connected between this diverter switch 23 and this LED module 11, the other end be connected to this switching diode 24 positive utmost point ﹔ and
One ground connection diode 26, includes an anode and a negative electrode, and its negative electrode is connected between this storage capacitors 25 and this switching diode 24, again its anodic bonding to one earth terminal; Wherein this switching diode 24 is by this ground connection diode 26 and then be connected to this earth terminal.
From said structure, when this series-parallel mark voltage divider 20 during for paralleling model except making this dividing potential drop electric capacity 21 is connected to wherein between at least one LED unit 12 and earth terminal, with season this dividing potential drop electric capacity 21 in parallel with this storage capacitors 25; Use when this dividing potential drop electric capacity 21 is when discharging, this storage capacitors 25 can be charged to it simultaneously, when this dividing potential drop electric capacity 21 is when charging, 25 pairs of at least one LED unit 12 of this storage capacitors discharge again, and the electric current of this at least one LED unit of further flowing through is more stable.
Please refer to shown in Fig. 4, is fourth embodiment of the invention, and its structure is roughly identical with the first embodiment; Its difference be in, in the present embodiment, above-mentioned LED module 11 includes three LED unit 12; And this use mark voltage divider further includes with the linear LED drive circuit of regulation voltage:
One multiplexer 31, is connected to this minute pressure controller 30, and is serially connected with between this selector switch 23 and this LED module 11; Wherein this multiplexer 31 is connected between each LED unit 12, and by the control 30 of this minute pressure controller, this selector switch 23 is optionally connected to wherein between two LED unit 12;
One storage capacitors 25, its one end is connected between this diverter switch 23 and this multiplexer 31, the other end be connected to this switching diode 24 positive utmost point ﹔ and
One ground connection diode 26, its negative electrode is connected between this storage capacitors 25 and this switching diode 24, again its anodic bonding to one earth terminal; Wherein this switching diode 24 is by this ground connection diode 26 and then is connected to this earth terminal.
From said structure, this 4th embodiment, in conjunction with the feature of aforementioned two kinds of embodiment, not only can pass through the switching of this multiplexer 31, and then determine the magnitude of voltage on this dividing potential drop electric capacity 21; Also can further provide more stable electric current by this storage capacitors 25.
Please refer to shown in Fig. 5, for the present invention uses mark voltage divider with the 5th embodiment of the linear LED drive circuit of regulation voltage, include:
One rectification unit 10, is connected to an AC power AC/IN, and above-mentioned AC power AC/IN is converted to a Voltage pulsating direct-current supply; In the present embodiment, this rectification unit 10 is a full-wave rectifier
One LED module 11, is connected in series this rectification unit 10, and includes a plurality of LED unit 12; In the present embodiment, above-mentioned LED module 11 includes two LED unit 12, and each LED unit 12 includes many LED light sources;
Certain current controller 13, is connected in series between this LED module 11 and an earth terminal, and forms an electric power loop; Wherein this is determined the flow through electric current of this electric power loop of current controller 13 order and is fixed as certain value; In the present embodiment, this is determined the current detecting unit 15 and that current controller 13 includes a voltage-controlled transistor 14, this voltage-controlled transistor 14 of serial connection and is electrically connected to the current stabilization control unit 16 of this voltage-controlled transistor 14 and this current detecting unit 15; Wherein this voltage-controlled transistor 14 is connected in series to this LED module 11 with this current detecting unit 15, and form above-mentioned electric power loop: and this current detecting unit 15 detects the electric current of this electric power loop of flowing through, and by a low-frequency filter 17, detected current signal is sent to this current stabilization control unit 16; This current stabilization control unit 16, according to above-mentioned current signal by the flow through electric current of this electric power loop of these voltage-controlled transistor 14 FEEDBACK CONTROL, maintains the current stabilization of this electric power loop again;
One series-parallel mark voltage divider 40, is connected to this LED module 11 and this is determined between current controller 13, and has series model and paralleling model, and includes a dividing potential drop electric capacity 41; Wherein this series model makes this dividing potential drop electric capacity 41 be serially connected with this LED module 11 and this is determined between current controller 13, and this paralleling model makes this dividing potential drop electric capacity 41 be connected to wherein between at least one LED unit 12 and this earth terminal; In the present embodiment, this dividing potential drop electric capacity 41 has anode and negative terminal; This series-parallel mark voltage divider 40, further includes a control diode 42, a selector switch 43, a switching diode 44, pass-transistor 45 and bypass resistance 46 again, wherein:
This controls diode 42 serial connections to this dividing potential drop electric capacity 41, and includes an anode and a negative electrode; Wherein the negative electrode of this control diode 43 is connected to the anode of this dividing potential drop electric capacity 41;
One end of this selector switch 43 is connected between this control diode 42 and this dividing potential drop electric capacity 41, and the other end is connected to wherein between two LED unit 12;
This switching diode 44 includes an anode and a negative electrode, and its negative electrode is connected to the negative terminal of this dividing potential drop electric capacity 21, again its anodic bonding to one earth terminal;
This pass-transistor 45, is connected to the anode of this control diode 42, and includes a control end Vg;
These bypass resistance 46 its one end serial connections are to this pass-transistor 45, and the other end is connected to this earth terminal; And
Within one minute, pressure controller 30, inside have a voltage safety value VF, and are connected to this rectification unit 10 and this series-parallel mark voltage divider 40; Wherein this minute pressure controller 30 detects the magnitude of voltage Vdc of the Voltage pulsating direct-current supply that these rectification units 10 export; And when the magnitude of voltage Vdc of above-mentioned Voltage pulsating direct-current supply surpasses this voltage safety value VF, controlling this series-parallel mark voltage divider is series model; Otherwise controlling this series-parallel mark voltage divider is paralleling model; In the present embodiment, this minute pressure controller 30 is connected to the control end of this selector switch 43 and this pass-transistor 45, and when the magnitude of voltage Vdc of above-mentioned Voltage pulsating direct-current supply is greater than voltage safety value VF, control this selector switch 43 and present cut-off state with this pass-transistor 45, otherwise present conducting state.
From said structure, when the fifth embodiment of the present invention makes this series-parallel mark voltage divider 40 for series model, because this dividing potential drop electric capacity 41 is serially connected with this LED module 11 and this is determined between current controller 13; Therefore, identical with first embodiment of the invention, the magnitude of voltage Vdc of this Voltage pulsating direct-current supply is that dividing potential drop some is to this dividing potential drop electric capacity 41; And when this series-parallel mark voltage divider 20 is paralleling model, makes this dividing potential drop electric capacity 41 be connected to wherein between at least one LED unit 12 and this earth terminal, and make this dividing potential drop electric capacity 41 discharge to it, to provide stabling current to give this at least one LED unit 12; Wherein, the discharge path of this dividing potential drop electric capacity 41 is via this selector switch 43, this at least one LED unit 12, this pass-transistor 45, this bypass resistance 46 and this switching diode 44.
Again when above-mentioned series-parallel mark voltage divider 40 enters series model again, because discharging 41 pairs of at least one LED unit 12 of this dividing potential drop electric capacity, therefore the voltage on these dividing potential drop electric capacity 41 its two ends, is equal to above-mentioned Voltage pulsating direct-current supply dividing potential drop some to the magnitude of voltage on this dividing potential drop electric capacity 21 with first embodiment of the invention; Be with similarly, user also can be by the quantity of setting the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 41 in the 5th embodiment, and then determine the magnitude of voltage on this dividing potential drop electric capacity 21.
Please refer to shown in Fig. 6, is the present invention the 6th embodiment preferably, and its structure is roughly identical with the 5th embodiment; Its difference is in the present embodiment, and above-mentioned LED module 11 includes three LED unit 12; And this use mark voltage divider further includes with the linear LED drive circuit of regulation voltage:
One multiplexer 31, is connected to this minute pressure controller 30, and is serially connected with between this selector switch 43 and this LED module 11; Wherein this multiplexer 31 is connected between each LED unit 12, and by the control of this minute pressure controller 30, this selector switch 43 is optionally connected to wherein between two LED unit 12.
From said structure, the present invention preferably the 6th its principle of embodiment is identical with above-mentioned the second embodiment, all, by the switching of this multiplexer 31, set the quantity of the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 41, and then determine the magnitude of voltage on this dividing potential drop electric capacity 21.
Please refer to shown in Fig. 7, is seventh embodiment of the invention, and its structure is roughly identical with the 5th embodiment; Its difference be in, making this selector switch 43 is a selection diode 47, and this selection diode 47 includes an anode and a negative electrode; Wherein this is selected between this control diode 42 of diode 47 its anodic bondings and this dividing potential drop electric capacity 41, and its negative electrode is connected to wherein between two LED unit 12.
Please refer to shown in Fig. 7 and Fig. 8, making its voltage effective value of above-mentioned AC power AC/IN is 110 volts (peak value is 156 volts), and make this voltage safety value VF, it is 120 volts, and the cut-in voltage VLED2 that makes the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 41 is 20 volts, the cut-in voltage VLED1 that makes again all the other each LED unit 12 is 100 volts; Now, the cut-in voltage VLED2 that equals the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 41 due to the magnitude of voltage on this dividing potential drop electric capacity 21 is 20 volts.
Therefore,, when 156 volts of the maximum peak voltages of AC power AC/IN surpass voltage safety value VF (120) volt, making this series-parallel mark voltage divider 40 is series model; And the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 41 bears the voltage of 20 volts, and all the other each LED unit 12 bear the voltage of 100 volts, this dividing potential drop electric capacity 21 bears the voltage of 20 volts and continues charging again, and this is determined current controller 13 and bears remaining 19 volts.
Please merge with reference to shown in Fig. 9, due to above-mentioned and the voltage Vt (20 volts) of dividing potential drop electric capacity 41, equal again the cut-in voltage (20 volts) of the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 41; Therefore, the voltage that this dividing potential drop electric capacity 41 bears (20 volts) accounts for the sixth of the cut-in voltage (120 volts) of all LED unit 12 in this LED module 11, still such kenel can be called except 1.16 circuit; And the cut-in voltage (120 volts) that the voltage that the present invention bears (1+X) VF system is promoted to all LED unit 12 adds the voltage (20 volts) that this dividing potential drop electric capacity 41 bears, the cut-in voltage (120 volts) that wherein above-mentioned X is all LED unit 12 is except the voltage (20 volts) that above this dividing potential drop electric capacity 41 bears, and its value is 0.16.
Comprehensive the above, because the present invention can be by the quantity of setting the above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 21,41, and then determine the magnitude of voltage on this dividing potential drop electric capacity 21, so that the present invention can be applicable to different voltage; Therefore, the manufacturer of AC LED drive circuit only needs to design an identical circuit, and according to the quantity of the different above-mentioned LED unit 12 being connected with dividing potential drop electric capacity 21,41 of requirements set, can make the present invention be applied to the voltage range of different AC power; Use on the cost that solves manufacturer and storage pressure.
Claims (11)
1. use mark voltage divider with a linear LED drive circuit for regulation voltage, it is characterized in that, include:
One rectification unit, is connected to an AC power, and above-mentioned AC power is converted to a Voltage pulsating direct-current supply;
One LED module, is connected in series this rectification unit, and includes a plurality of LED unit;
Certain current controller, is connected in series between this LED module and an earth terminal, and forms an electric power loop; Wherein this is determined the flow through electric current of this electric power loop of current controller order and is fixed as certain value;
One series-parallel mark voltage divider, is connected between this rectification unit and this LED module, and has series model and paralleling model, and includes a dividing potential drop electric capacity; Wherein this series model is for making this dividing potential drop capacitance series between this rectification unit and this LED module, and this paralleling model is for making this dividing potential drop electric capacity be connected to wherein between at least one LED unit and this earth terminal; And
One minute pressure controller, inside has a voltage safety value, and is connected to this rectification unit and this series-parallel mark voltage divider; The magnitude of voltage of the Voltage pulsating direct-current supply that wherein this minute pressure controller exported for detection of this rectification unit; And when the magnitude of voltage of above-mentioned Voltage pulsating direct-current supply surpasses this voltage safety value, controlling this series-parallel mark voltage divider is series model; Otherwise controlling this series-parallel mark voltage divider is paralleling model.
2. use mark voltage divider as claimed in claim 1, with the linear LED drive circuit of regulation voltage, is characterized in that:
This its dividing potential drop electric capacity of series-parallel mark voltage divider has anode and negative terminal, and further includes:
One controls diode, is connected in series to this dividing potential drop electric capacity, and includes an anode and a negative electrode; Wherein this controls the anodic bonding of diode to the negative terminal of this dividing potential drop electric capacity;
One selector switch, its one end is connected to this rectification unit, and the other end is connected to wherein between two LED unit; And
One switching diode, includes an anode and a negative electrode, and its negative electrode is connected between this dividing potential drop electric capacity and this control diode, and its anodic bonding is to this earth terminal again;
And this minute pressure controller is connected to this selector switch, and when the magnitude of voltage of above-mentioned Voltage pulsating direct-current supply is greater than voltage safety value, controls this selector switch and present cut-off state, otherwise present conducting state.
3. use mark voltage divider as claimed in claim 2, with the linear LED drive circuit of regulation voltage, is characterized in that, further includes:
One multiplexer, is connected to this minute pressure controller, and is serially connected with between this selector switch and this LED module; Wherein this multiplexer is connected between each LED unit, and by the control of this minute pressure controller, this selector switch is optionally connected to wherein between two LED unit.
4. use mark voltage divider as claimed in claim 2, with the linear LED drive circuit of regulation voltage, is characterized in that, further includes:
One storage capacitors, its one end is connected between this diverter switch and this LED module, the other end be connected to this switching diode positive utmost point ﹔ and
One ground connection diode, includes an anode and a negative electrode, and its negative electrode is connected between this storage capacitors and this switching diode, again its anodic bonding to one earth terminal; Wherein this switching diode is by this ground connection diode and then be connected to this earth terminal.
5. use mark voltage divider as claimed in claim 2, with the linear LED drive circuit of regulation voltage, is characterized in that, further includes:
One multiplexer, is connected to this minute pressure controller, and is serially connected with between this selector switch and this LED module; Wherein this multiplexer is connected between each LED unit, and by the control of this minute pressure controller, this selector switch is optionally connected to wherein between two LED unit;
One storage capacitors, its one end is connected between this diverter switch and this multiplexer, the other end be connected to this switching diode positive utmost point ﹔ and
One ground connection diode, its negative electrode is connected between this storage capacitors and this switching diode, again its anodic bonding to one earth terminal; Wherein this switching diode is by this ground connection diode and then be connected to this earth terminal.
6. as the linear LED drive circuit of the use mark voltage divider as described in arbitrary in claim 1 to 5 with regulation voltage, it is characterized in that, this is determined current controller and includes:
One voltage-controlled transistor, is connected in series to this LED unit, and forms an electric power loop;
One current detecting unit, is connected in series this voltage-controlled transistor; And the electric current of this electric power loop of flowing through detects in this current detecting unit system; And
One current stabilization control unit, is electrically connected to this voltage-controlled transistor and this current detecting unit, and reads the detected current signal of this current detecting unit by a low-frequency filter; Wherein this current stabilization control unit according to above-mentioned current signal by the flow through electric current of this electric power loop of this voltage-controlled transistor and then adjustment.
7. use mark voltage divider with a linear LED drive circuit for regulation voltage, it is characterized in that, comprise a rectification unit, be connected to an AC power, and above-mentioned AC power is converted to a Voltage pulsating direct-current supply;
One LED module, is connected in series this rectification unit, and includes a plurality of LED unit;
Certain current controller, is connected in series between this LED module and an earth terminal, and forms an electric power loop; Wherein this is determined the flow through electric current of this electric power loop of current controller order and is fixed as certain value;
One series-parallel mark voltage divider, is connected to this LED module and this is determined between current controller, and has series model and paralleling model, and includes a dividing potential drop electric capacity; Wherein this series model system makes this dividing potential drop capacitance series determine between current controller in this LED module and this, and this paralleling model makes this dividing potential drop electric capacity be connected to wherein between at least one LED unit and this earth terminal; And
One minute pressure controller, inside has a voltage safety value, and is connected to this rectification unit and this series-parallel mark voltage divider; Wherein this minute pressure controller detects the magnitude of voltage of the Voltage pulsating direct-current supply that this rectification unit exports; And when the magnitude of voltage of above-mentioned Voltage pulsating direct-current supply surpasses this voltage safety value, controlling this series-parallel mark voltage divider is series model; Otherwise controlling this series-parallel mark voltage divider is paralleling model.
8. use mark voltage divider as claimed in claim 7, with the linear LED drive circuit of regulation voltage, is characterized in that, this its dividing potential drop electric capacity of series-parallel mark voltage divider has anode and negative terminal, and further comprises:
One controls diode, is connected in series to this dividing potential drop electric capacity, and includes an anode and a negative electrode; Wherein the negative electrode of this control diode is connected to the anode of this dividing potential drop electric capacity;
One selector switch, its one end is connected between this control diode and this dividing potential drop electric capacity, and the other end is connected to wherein between two LED unit;
One switching diode, includes an anode and a negative electrode, and its negative electrode is connected to the negative terminal of this dividing potential drop electric capacity, again its anodic bonding to one earth terminal;
One pass-transistor, is connected to the anode of this control diode, and includes a control end; And
One bypass resistance, its one end serial connection is to this pass-transistor, and the other end is connected to this earth terminal;
And this minute pressure controller is connected to the control end of this selector switch and this pass-transistor, and when the magnitude of voltage of above-mentioned Voltage pulsating direct-current supply is greater than voltage safety value, controls this selector switch and this pass-transistor and present cut-off state, otherwise present conducting state.
9. use mark voltage divider as claimed in claim 8, with the linear LED drive circuit of regulation voltage, is characterized in that, further includes:
One multiplexer, is connected to this minute pressure controller, and is serially connected with between this selector switch and this LED module; Wherein this multiplexer is connected between each LED unit, and by the control of this minute pressure controller, this selector switch is optionally connected to wherein between two LED unit.
10. use mark voltage divider as claimed in claim 8, with the linear LED drive circuit of regulation voltage, is characterized in that, this selector switch is a selection diode, and this selection diode includes an anode and a negative electrode; Wherein this is selected between this control diode of its anodic bonding of diode and this dividing potential drop electric capacity, and its negative electrode is connected to wherein between two LED unit.
11. as the linear LED drive circuit of the use mark voltage divider as described in arbitrary in claim 7 to 10 with regulation voltage, it is characterized in that, this determines current controller, includes:
One voltage-controlled transistor, is connected in series to this LED unit, and forms an electric power loop;
One current detecting unit, is connected in series this voltage-controlled transistor; And this current detecting unit detects the electric current of this electric power loop of flowing through; And
One current stabilization control unit, is electrically connected to this voltage-controlled transistor and this current detecting unit, and reads the detected current signal of this current detecting unit by a low-frequency filter; Wherein this current stabilization control unit according to above-mentioned current signal by the flow through electric current of this electric power loop of this voltage-controlled transistor and then adjustment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101133925A TW201414349A (en) | 2012-09-17 | 2012-09-17 | Linear LED driving circuit using a fractional voltage divider to regulate voltage |
| TW101133925 | 2012-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103687176A true CN103687176A (en) | 2014-03-26 |
Family
ID=50323090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310219121.0A Pending CN103687176A (en) | 2012-09-17 | 2013-06-04 | Linear LED driver circuit using fractional divider to regulate voltage |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103687176A (en) |
| TW (1) | TW201414349A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9441795B2 (en) | 2013-09-25 | 2016-09-13 | Silicon Hill B.V. | LED lamp with ballast detection and method thereof |
| WO2016151126A1 (en) * | 2015-03-26 | 2016-09-29 | Silicon Hill B.V. | Led lighting system |
| WO2016151109A1 (en) * | 2015-03-26 | 2016-09-29 | Silicon Hill B.V. | Led lighting system |
| EP3240367A1 (en) * | 2016-04-29 | 2017-11-01 | Silicon Hill B.V. | Ballast independent retrofit led lamp with flicker reduction circuitry |
| CN108089766A (en) * | 2018-01-23 | 2018-05-29 | 武汉华星光电半导体显示技术有限公司 | Touch drive circuit, touch control component, touch-control driving method and display touch control device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101489327A (en) * | 2008-01-14 | 2009-07-22 | 杨泰和 | Bi-directional light emitting diode drive circuit in pulsed power non-resonance |
| CN201898641U (en) * | 2010-05-14 | 2011-07-13 | 皇家飞利浦电子股份有限公司 | Self-adaption circuits |
| CN102244955A (en) * | 2010-05-14 | 2011-11-16 | 皇家飞利浦电子股份有限公司 | Adaptive circuit |
| JP2012028247A (en) * | 2010-07-27 | 2012-02-09 | Eye Lighting Syst Corp | Illumination lighting device |
| CN102548129A (en) * | 2010-12-11 | 2012-07-04 | 朗捷科技股份有限公司 | AC LED driving circuit |
| CN202353846U (en) * | 2011-06-22 | 2012-07-25 | 罗姆股份有限公司 | Power supply for illumination of light-emitting diode (LED) |
| CN103687175A (en) * | 2012-08-28 | 2014-03-26 | 朗捷科技股份有限公司 | Linear LED drive circuit using capacitor series-parallel voltage reduction |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201663732U (en) * | 2009-11-23 | 2010-12-01 | 阎智广 | Capacitor transformation circuit of AC 220V LED illuminating lamp |
| JP2012009286A (en) * | 2010-06-25 | 2012-01-12 | Mitsubishi Electric Corp | Led lighting device and led illumination equipment |
| TWM448872U (en) * | 2012-09-17 | 2013-03-11 | Luxul Technology Inc | Linear LED driving circuit using fraction voltage division to regulate voltage |
-
2012
- 2012-09-17 TW TW101133925A patent/TW201414349A/en not_active IP Right Cessation
-
2013
- 2013-06-04 CN CN201310219121.0A patent/CN103687176A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101489327A (en) * | 2008-01-14 | 2009-07-22 | 杨泰和 | Bi-directional light emitting diode drive circuit in pulsed power non-resonance |
| CN201898641U (en) * | 2010-05-14 | 2011-07-13 | 皇家飞利浦电子股份有限公司 | Self-adaption circuits |
| CN102244955A (en) * | 2010-05-14 | 2011-11-16 | 皇家飞利浦电子股份有限公司 | Adaptive circuit |
| JP2012028247A (en) * | 2010-07-27 | 2012-02-09 | Eye Lighting Syst Corp | Illumination lighting device |
| CN102548129A (en) * | 2010-12-11 | 2012-07-04 | 朗捷科技股份有限公司 | AC LED driving circuit |
| CN202353846U (en) * | 2011-06-22 | 2012-07-25 | 罗姆股份有限公司 | Power supply for illumination of light-emitting diode (LED) |
| CN103687175A (en) * | 2012-08-28 | 2014-03-26 | 朗捷科技股份有限公司 | Linear LED drive circuit using capacitor series-parallel voltage reduction |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9441795B2 (en) | 2013-09-25 | 2016-09-13 | Silicon Hill B.V. | LED lamp with ballast detection and method thereof |
| US10136486B2 (en) | 2015-03-26 | 2018-11-20 | Silicon Hill B.V. | LED lighting system |
| WO2016151126A1 (en) * | 2015-03-26 | 2016-09-29 | Silicon Hill B.V. | Led lighting system |
| WO2016151125A1 (en) * | 2015-03-26 | 2016-09-29 | Silicon Hill B.V. | Led lighting system |
| WO2016151109A1 (en) * | 2015-03-26 | 2016-09-29 | Silicon Hill B.V. | Led lighting system |
| NL2014525A (en) * | 2015-03-26 | 2016-10-10 | Silicon Hill Bv | Led lighting system. |
| EP3562271A1 (en) * | 2015-03-26 | 2019-10-30 | Silicon Hill B.V. | Led lighting system |
| US9832837B2 (en) | 2015-03-26 | 2017-11-28 | Silicon Hill B.V. | LED lighting system |
| CN107432066A (en) * | 2015-03-26 | 2017-12-01 | 硅山有限公司 | LED illumination System |
| CN107432066B (en) * | 2015-03-26 | 2019-07-09 | 硅山有限公司 | LED illumination System |
| WO2017186723A1 (en) * | 2016-04-29 | 2017-11-02 | Silicon Hill B.V. | Ballast independent retrofit led lamp with flicker reduction circuitry |
| EP3240367A1 (en) * | 2016-04-29 | 2017-11-01 | Silicon Hill B.V. | Ballast independent retrofit led lamp with flicker reduction circuitry |
| CN108089766A (en) * | 2018-01-23 | 2018-05-29 | 武汉华星光电半导体显示技术有限公司 | Touch drive circuit, touch control component, touch-control driving method and display touch control device |
| CN108089766B (en) * | 2018-01-23 | 2020-03-27 | 武汉华星光电半导体显示技术有限公司 | Touch driving circuit, touch assembly, touch driving method and display touch equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI505745B (en) | 2015-10-21 |
| TW201414349A (en) | 2014-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9820349B2 (en) | Apparatus, method and system for providing AC line power to lighting devices | |
| CN103249217B (en) | Light-emitting diode driving apparatus | |
| US9380656B2 (en) | Power control unit and method for controlling electrical power provided to a load, in particular an LED unit, and voltage control unit for controlling an output voltage of a converter unit | |
| CN102378450B (en) | Led driver circuit and led lighting device using the same | |
| US9750099B2 (en) | Light emitting device with low voltage-endurance components | |
| CN205546088U (en) | A drive circuit and lighting device for emitting diode | |
| US20130002141A1 (en) | Led driving system and method for variable voltage input | |
| US20100308738A1 (en) | Apparatus, Method and System for Providing AC Line Power to Lighting Devices | |
| EP2140732A1 (en) | Improvements relating to lighting systems | |
| JP2013239711A (en) | Device and method for driving led lamp | |
| CN103687176A (en) | Linear LED driver circuit using fractional divider to regulate voltage | |
| CN103843461B (en) | For the drive circuit of Solid-state light bulb assembly | |
| CN103841731B (en) | A kind of switch-segment light adjusting circuit driven for LED | |
| CN103687175A (en) | Linear LED drive circuit using capacitor series-parallel voltage reduction | |
| KR20160077718A (en) | Led lighting apparatus for three phase ac and led lighting system comprising the same | |
| CN103687173A (en) | Universal linear LED drive circuit capable of de-flashing | |
| KR20140146888A (en) | Light emitting diode lighting apparatus and driving method thereof | |
| CN105993205B (en) | For operating the circuit arrangement of LED strings | |
| CN107820348B (en) | Linear full-voltage variable-frequency constant-current circuit and LED lamp with same | |
| US20110255317A1 (en) | Intelligent multi-stage variable-power switch power supply device | |
| US8994283B2 (en) | Circuit for controlling a lighting unit having a periodic power supply with a thyristor | |
| CN103517501A (en) | Light emitting unit driver, drive method and light emitting device | |
| KR101288848B1 (en) | A lighting Control Circuit for LED lighting | |
| TWM448872U (en) | Linear LED driving circuit using fraction voltage division to regulate voltage | |
| US9370062B2 (en) | LED lighting apparatus comprising an energy storage module and method for operating the LED lighting apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |