CN105517275A - A driving circuit, a dimming controller and a method for adjusting power of a light source - Google Patents
A driving circuit, a dimming controller and a method for adjusting power of a light source Download PDFInfo
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- CN105517275A CN105517275A CN201510641716.4A CN201510641716A CN105517275A CN 105517275 A CN105517275 A CN 105517275A CN 201510641716 A CN201510641716 A CN 201510641716A CN 105517275 A CN105517275 A CN 105517275A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 5
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000005286 illumination Methods 0.000 abstract 3
- 230000001939 inductive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
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- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- 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]
- H05B45/10—Controlling the intensity of the light
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/185—Controlling the light source by remote control via power line carrier transmission
-
- 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
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
A driving circuit, a dimming controller and a method for adjusting power of a light source are provided. The dimming controller includes a monitoring terminal, a control terminal and a power supply terminal, wherein the monitoring terminal is used for receiving switch monitoring signals indicating on/off states of a power supply switch, the power supply switch transmits power from an AC power supply to a rectifier, a power converter receives the power from the rectifier and outputs power to a light source when the power supply is switched on, an average current flowing through the power supply when the power supply is switched on is adopted as a first current, the control terminal is used for providing control signals to adjust the average current according to the switch monitoring signals so as to control illumination of the light source, and the power supply terminal is used for receiving power from the AC power supply through the power supply switch when the power supply is switched on, and receiving power from the AC power supply through an illumination indicator when the power supply is switched off. After the power supply is switched on, switched off and switched on again, the dimming controller can change or memory the illumination of the light source according to a time interval from the time the power supply is switched on to the time the power supply is switched on again.
Description
Technical field
The present invention relates to a kind of light source driving circuit, particularly relate to a kind of drive circuit and the control method with light adjusting controller.
Background technology
In recent years, light source such as light-emitting diode (LEDs) was improved along with the technological progress of the aspect such as material and manufacturing process.Light-emitting diode is used in multiple industrial circle because having the advantages such as efficient, long service life, color clear, such as automobile, computer, telecommunications, military affairs and consumer electronics field etc.An application example replaces conventional light source (such as tungsten lamp) with LED etc.
Figure 1 shows that a kind of structure chart of traditional light-emitting diode (LED) drive circuit 100.LED driving circuit 100 uses light-emitting diode chain 106 as light source.Light-emitting diode chain 106 comprises the light-emitting diode of one group of series connection.Electric power converter 102 is by input voltage V
iNconvert the direct voltage V of needs to
oUT, to export to light-emitting diode chain 106.Switch 104 is coupled with electric power converter 102, for enable or forbid to the input voltage V of light-emitting diode chain 106
iN, thus be switched on or switched off LED.Electric power converter 102 receives from electric current inductive reactance R
sENfeedback signal, and adjust output voltage V
oUTrequired light output is produced to make light-emitting diode chain 106.The shortcoming of this scheme is the light output of light-emitting diode chain 106 is the grade preset, and can not be regulated by user.
Figure 2 shows that the structure chart of another kind of traditional light-emitting diode (LED) drive circuit 200.Electric power converter 102 is by input voltage V
iNconvert the direct voltage V of needs to
oUT, power to give light-emitting diode chain 106.Switch 104 is coupled with electric power converter 102, for enable or forbid to the input voltage V of light-emitting diode chain 106
iN, thus be switched on or switched off LED.LED chain 106 is coupled with linear LED current rectifier 208.Operational amplifier 210 in linear LED current adjuster 208 is by reference signal REF and from electric current inductive reactance R
sENcurrent monitor signal compare, and produce control signal with linear model lower joint transistor 202 resistance.Therefore, the electric current flowing through light-emitting diode chain 106 is adjusted accordingly.For this scheme, in order to control the output of light-emitting diode chain 106, user needs to use special equipment to regulate reference signal REF, such as, have the custom switches regulating button or the switch that can receive remote control signal.
Summary of the invention
The invention provides a kind of for regulating the light adjusting controller of light source, described light adjusting controller comprises: monitoring port, for receiving the ON/OFF state of switch monitor signal of instruction mains switch, electric energy is transferred to rectifier from AC power by wherein said mains switch, electric power converter receives input electric energy from described rectifier and provides output electric energy to described light source when described power switch conducts, and when described power switch conducts, the average current flowing through described light source is the first current value; Control port, for providing control signal to regulate described average current according to described switch monitors signal, thus controls the brightness of described light source; And power port, for when described power switch conducts, receive the electric energy from described AC power by described mains switch, and when described mains switch disconnects, by the electric energy of illuminated indicator reception from described AC power.
Present invention also offers a kind of drive circuit controlling light source, described drive circuit comprises: electric power converter, there is provided export electric energy to light source for the input electric energy that receives from rectifier, wherein when the power switch conducts, the delivery of electrical energy from AC power is given described rectifier by described mains switch; And be coupled in the light adjusting controller of described electric power converter, for receiving the ON/OFF state of switch monitor signal indicating described mains switch, and the average current of described light source is flowed through according to described switch monitors Signal Regulation, thus regulate the brightness of described light source, wherein, when described power switch conducts, the described average current flowing through described light source is the first current value, when described mains switch disconnects, electric current flow to the ground of described drive circuit via the current path being coupled in described light adjusting controller from described AC power.
Present invention also offers a kind of method regulating light source electric power.Described method comprises: be used for self-rectifying device commutating voltage give described light source energy supply; Receive the ON/OFF state of switch monitor signal of instruction mains switch, the delivery of electrical energy of AC power is given described rectifier by wherein said mains switch; If described power switch conducts, regulate average current to the first current value flowing through described light source; Measure described mains switch from the time interval be disconnected to next time between conducting; And the described average current flowing through described light source is adjusted according to described switch monitors signal and the described time interval.
Accompanying drawing explanation
Below by way of the description in conjunction with some embodiments of the present invention and accompanying drawing thereof, object of the present invention, specific structural features and advantage can be understood further.
Figure 1 shows that a kind of structural representation of conventional light emitting diodes drive circuit;
Figure 2 shows that the structural representation of another kind of conventional light emitting diodes drive circuit;
Figure 3 shows that the structural representation of light source driving circuit according to an embodiment of the invention;
Figure 4 shows that the structural representation of the light adjusting controller in Fig. 3 according to an embodiment of the invention;
Figure 5 shows that the operation chart of light source driving circuit according to an embodiment of the invention;
Figure 6 shows that the signal waveforms of light source driving circuit according to an embodiment of the invention;
Figure 7 shows that the flow chart of the method regulating light source electric power according to an embodiment of the invention; And
Figure 8 shows that the method flow diagram regulating light source electric power according to another embodiment of the present invention.
Embodiment
Below will provide detailed description to embodiments of the invention.Although the present invention is undertaken setting forth and illustrating by these execution modes, it should be noted that the present invention is not merely confined to these execution modes.On the contrary, all substitutes, variant and the equivalent in invention spirit and invention scope that appended claim defines is contained in the present invention.
In addition, in order to better the present invention is described, in embodiment hereafter, give numerous details.It will be understood by those skilled in the art that do not have these details, the present invention can implement equally.In other example, known method, flow process, element and circuit are not described in detail, so that highlight purport of the present invention.
Figure 3 shows that the structural representation of light source driving circuit 300 according to an embodiment of the invention.Light source driving circuit 300 comprises rectifier 304 (such as bridge rectifier).Rectifier 304 is coupled with AC power 320 by lighting switch 302.Lighting switch 302 can be installed on the wall, for controlling the light source in family.Lighting switch 302 comprises illuminated indicator.Illuminated indicator can be the light-emitting diode 306 shown in Fig. 3, also can be the light source (as neon light) of other types.Light-emitting diode 306 is connected with resistance R2.Lighting switch 302 also comprises the mains switch Q1 be coupled between AC power 320 and rectifier 304.In one embodiment, mains switch Q1 is similar to double control switch, can install on wall at home.Mains switch Q1 is also in parallel with light-emitting diode 306 and resistance R2.When mains switch Q1 is conducting state, electric energy transfers to rectifier 304 from AC power 320.When mains switch Q1 is off state, electric current flow to the ground of light source driving circuit 300 by current path from AC power 320, and current path comprises resistance R2, light-emitting diode 306, rectifier 304, resistance R10, inductance L 1 and resistance R8.Like this, light-emitting diode 306 is lit, and user also can locate lighting switch 302 in the dark.
Light source driving circuit 300 comprises electric power converter 310, for receiving the input electric energy from rectifier 304, and provides output electric energy to light source (such as light-emitting diode chain 312).In the example shown in Fig. 3, electric power converter 310 comprises control switch Q2, inductance L 1 and diode D1.Light adjusting controller 308 is coupled with electric power converter 310, for receiving the state of switch monitor signal of instruction mains switch Q1.The state of mains switch Q1 comprises conducting state and off-state.Light adjusting controller 308 flows through the average current of light-emitting diode chain 312 according to switch monitors Signal Regulation, thus regulates the brightness of light-emitting diode chain 312.In addition, light adjusting controller 308 is coupled with current path as described above (comprising resistance R2, light-emitting diode 306, rectifier 304, resistance R10, inductance L 1 and resistance R8).Like this, when mains switch Q1 disconnects, light adjusting controller 308 is still powered.Light source driving circuit 300 also comprises current inductor R1.The current monitor signal ISEN (as shown in Figure 4) of current inductor R1 for providing instruction to flow through the electric current of light-emitting diode chain 312.
In one embodiment, the port of light adjusting controller 308 comprises CLK, RT, COMP, VDD, CS, DRV and GND.Monitoring port CLK is coupled with rectifier 304 by resistance R3, is coupled by the reference of resistance R6 and controller 308 simultaneously.Monitoring port CLK is for receiving the state of switch monitor signal of instruction mains switch Q1, and the state of mains switch Q1 comprises off-state and conducting state.In one embodiment, switch monitors signal can the common node between resistance R3 and resistance R6 produce.Port RT is coupled with the ground of light source driving circuit 300 by resistance R7.The resistance of resistance R7 determines the charging current of the electric capacity (not shown in Fig. 3) in light adjusting controller 308, thus also determines the frequency of the pulse signal that light adjusting controller 308 produces.
Power port VDD is coupled with AC power 320 by rectifier 304 and lighting switch 302, and gives light adjusting controller 308 energy supply.When mains switch Q1 conducting, power port VDD receives the electric energy from AC power 320 by rectifier 304 and mains switch Q1.When mains switch Q1 disconnects, power port VDD receives the electric energy from AC power 320 by rectifier 304 and illuminated indicator (such as light-emitting diode 306).
Control port DRV is coupled with control switch Q2.Light adjusting controller 308, for providing control signal according to switch monitors signal, to control control switch Q2, and then regulates the average current flowing through light-emitting diode chain 312.Current monitoring port CS is coupled with current inductor R1, flows through the current monitor signal ISEN of the electric current of light-emitting diode chain 312 for receiving instruction.Port COMP is coupled by the reference of electric capacity and light adjusting controller 308.Be coupled to the reference of port GND and light adjusting controller 308.
In one embodiment, light adjusting controller 308 has three predetermined voltage threshold: the first predetermined voltage threshold VDD_ON, the second predetermined voltage threshold VDD_OFF and the 3rd predetermined voltage threshold VDD_RESET.If the voltage of power port VDD is greater than the first predetermined voltage threshold VDD_ON (such as 15V), light adjusting controller 308 is powered.Light adjusting controller 308 controls control switch Q2 to light light-emitting diode chain 312, and regulates the average current of light-emitting diode chain 312.If the voltage of power port VDD is low to moderate lower than the second predetermined voltage threshold VDD_OFF (such as 9V) from the voltage drop higher than the first predetermined voltage threshold VDD_ON, light adjusting controller 308 controls control switch Q2 to extinguish light-emitting diode chain 312.Such as due to AC power 320 fault, if the voltage drop of power port VDD is low to moderate lower than the 3rd predetermined voltage threshold VDD_RESET (such as 4V), light adjusting controller 308 quits work.In one embodiment, when mains switch Q1 disconnects, the voltage of the power port VDD of light source driving circuit 300 is greater than the 3rd predetermined voltage threshold VDD_RESET and is less than the first predetermined voltage threshold VDD_ON, at this moment light-emitting diode chain 312 extinguishes, and light adjusting controller 308 still keeps "on" position.
In practical operation, when mains switch Q1 is conducting state, rectifier 304 is by the alternating voltage V of input
aCconvert commutating voltage V to
rEC.Voltage rise on power port VDD is extremely higher than the first predetermined voltage threshold VDD_ON.Light adjusting controller 308 works and controls control switch Q2.If light adjusting controller 308 connects control switch Q2, commutating voltage V
rECpower to light-emitting diode chain 312 and charge to inductance L 1, electric current flows through control switch Q2, current inductor R1, inductance L 1, light-emitting diode chain 312 to ground.If light adjusting controller 308 disconnects control switch Q2, electric current flows through inductance L 1, light-emitting diode chain 312 to diode D1, and inductance L 1 is powered to light-emitting diode chain 312 by electric discharge.Like this, by controlling the conducting state of control switch Q2, light adjusting controller 308 regulate from electric power converter 310 output electric energy and flow through the average current of light-emitting diode chain 312.
When mains switch Q1 is off state, electric current flow to the ground of power driving circuit 300 via current path from AC power 320, current path comprises resistance R2, light-emitting diode 306, rectifier 304, resistance R10, the reference ground of light adjusting controller 308, inductance L 1 and resistance R8.Light adjusting controller 308 is coupled with current path by power port VDD, thus realizes being powered when mains switch Q1 disconnects.
Figure 4 shows that the structural representation of the light adjusting controller 308 in Fig. 3 according to an embodiment of the invention.Figure 5 shows that the operation chart of light source driving circuit 300 according to an embodiment of the invention.Figure 6 shows that the signal waveforms according to one embodiment of the invention light source driving circuit 300.Composition graphs 5 and Fig. 6 are described by Fig. 4.
Light adjusting controller 308 comprises startup and low pressure lock-in circuit 402, timer 404, triggers monitoring means 406, reference signal generator 408, saw-toothed oscillator 410, pulse signal producer 412, filter 414, amplifier 416, comparator 418 and control signal generator 420.In another embodiment, light adjusting controller 308 does not comprise filter 414.
Startup and low pressure lock-in circuit 402 are coupled in power port VDD, for optionally starting one or more parts of light adjusting controller 308 inside according to different power levels (such as according to voltage and three predetermined voltage threshold VDD_ON, VDD_OFF and VDD_RESET of power port VDD).
Trigger monitoring means 406 for being received the ON/OFF state of switch monitor signal of instruction mains switch Q1 by port CLK and correspondingly producing drive singal with control timer 404 according to switch monitors signal.Timer 404 is for measuring mains switch Q1 from the time interval be disconnected to next time between conducting.Reference signal generator 408 is coupled with timer 404, for producing reference signal ADJ according to the Output rusults of timer 404.Filter 414 is coupled with current inductor R1 by port CS, for received current monitor signal ISEN, and produces according to current monitor signal ISEN the induced signal IAVG that instruction flows through the average current of light-emitting diode chain 312.Amplifier 416 is for producing error signal VEA by benchmark signal ADJ and induced signal IAVG.Saw-toothed oscillator 410 for producing sawtooth signal SAW under the control of pulse signal producer 412.Comparator 418 is for comparing error signal VEA with sawtooth signal SAW.Control signal generator 420 produces control signal (such as pulse width modulating signal PWM1), to control control switch Q2 (as shown in Figure 3) for the pulse signal RESET produced according to Output rusults and the pulse signal producer 412 of comparator 418.
Fig. 5 shows the state of voltage (voltage on such as resistance R6) on the port CLK of the conducting state of mains switch Q1, light adjusting controller 308 and reference signal ADJ.Such as, when after mains switch Q1 first time conducting, reference generator 408 produces the reference signal ADJ with the first estate.Therefore, the average current of light-emitting diode chain 312 is the first current value.When mains switch Q1 first time disconnects, the voltage on resistance R6 is down to 0.At this moment, by port CLK, light adjusting controller 308 detects that instruction mains switch Q1 is off state of switch monitor signal.Similarly, when mains switch Q1 conducting, the voltage rise on resistance R6 is to predeterminated voltage, and therefore, by port CLK, light adjusting controller 308 detects that instruction mains switch Q1 is the switch monitors signal of conducting state.In one embodiment, if the voltage of port CLK is at preset duration T
eNkeep in (such as 30ms) being less than magnitude of voltage V
t1(such as 3V), triggers monitoring means 406 and produces drive singal to start timer 404.If the voltage of port CLK is increased to magnitude of voltage V
t2, trigger monitoring means 406 and produce drive singal with pause timer 404.Like this, mains switch Q1 can be measured by timer 404 from the time interval be disconnected to next time between conducting and obtain.In one embodiment, if switch monitors signal designation mains switch Q1 is preset duration T upon opening
sTinside conducting again, control port DRV provide control signal with by the average current of light-emitting diode chain 312 from the first current value adjustment to the second current value.If switch monitors signal designation mains switch Q1 is preset duration T upon opening
sTconducting again after termination, control port DRV provides control signal so that the average current of light-emitting diode chain 312 is remained described first current value.In the example as shown in fig. 5, mains switch Q1 is less than preset duration T from the time interval T1 disconnected (being labeled as " first time disconnects ") to conducting next time (being labeled as " second time conducting ")
sT.Because T1 is less than T
sT, when the conducting of mains switch Q1 second time, reference signal ADJ is adjusted to the second grade from the first estate by reference signal generator 408.Correspondingly, when the conducting of mains switch Q1 second time, the average current of light-emitting diode chain 312 is from the first current value adjustment to the second current value, and the second current value is higher than the first current value.In the example as shown in fig. 5, mains switch Q1 is greater than preset duration T from the time interval T2 disconnected (being labeled as " second time disconnects ") to conducting next time (being labeled as " third time conducting ")
sT.Because T2 is greater than T
sT, reference signal generator 408 keeps reference signal ADJ constant, and therefore the average current of light-emitting diode chain 312 remains unchanged.In light adjusting controller 308, amplifier 416 produces error signal VEA according to reference signal ADJ and induced signal IAVG.In one embodiment, the light adjusting controller 308 in Fig. 3 has two light adjusting grades.Reference signal ADJ is after being adjusted to the second grade, if mains switch Q1 is switched on after being disconnected again, and is less than preset duration T from the time interval be disconnected to again between conducting
sT, reference signal ADJ is recalled to the first estate.In another embodiment, light adjusting controller 308 has the light adjusting grade of three or more.If mains switch Q1 is repeatedly disconnected conducting again, and be at every turn less than preset duration T from the time interval being disconnected to conducting next time
sT, reference signal ADJ will recall to the first estate again after being progressively transferred to each grade.
As shown in Fig. 6 and Fig. 4, in one embodiment, by the impact of pulse signal RESET, control signal generator 420 generation has the pulse width modulating signal PWM1 of the first estate (such as logical one) to connect control switch Q2.When control switch Q2 conducting, current monitor signal ISEN raises.Under the impact of pulse signal RESET, the sawtooth signal SAW that saw-toothed oscillator 410 produces increases from initial value INI.When the voltage of sawtooth signal SAW is increased to the voltage of error signal VEA, control signal generator 420 generation has the pulse width modulating signal PWM1 of the second grade (such as logical zero) to disconnect control switch Q2, current monitor signal ISEN decreases, and sawtooth signal SAW is reset to initial value INI.Until saw-toothed oscillator 410 receives the next pulse of reset signal RESET, sawtooth signal SAW increases again from initial value INI.
In one embodiment, the duty ratio of pulse width modulating signal PWM1 is determined by error signal VEA.If the voltage of induced signal IAVG is less than the voltage of reference signal ADJ, amplifier 416 raises the voltage of error signal VEA to increase the duty ratio of pulse width modulating signal PWM1.Therefore, the average current flowing through light-emitting diode chain 312 increases, until the voltage of induced signal IAVG is increased to the voltage of reference signal ADJ.If the voltage of induced signal IAVG is greater than the voltage of reference signal ADJ, amplifier 416 reduces the voltage of error signal VEA to reduce the duty ratio of pulse width modulating signal PWM1.Therefore, the average current flowing through light-emitting diode chain 312 reduces, until the voltage drop of induced signal IAVG is low to moderate the voltage of reference signal ADJ.Like this, the average current flowing through light-emitting diode chain 312 keeps substantially constant, remains on the target current value determined by reference signal ADJ.
In light adjusting controller 308, pulse signal generator 412 is connected to the reference ground of light adjusting controller 308 by port RT and resistance R7, and produces pulse signal RESET to connect control switch Q2.The frequency of pulse signal RESET is determined by the resistance of resistance R7.
If the voltage drop of port VDD is low to moderate the 3rd predetermined voltage threshold VDD_RESET (such as due to the power failure of AC power 320), light adjusting controller 308 disconnects.After light adjusting controller 308 is connected again, reference signal ADJ will be set to default level (such as the first estate).
Figure 7 shows that the flow chart 700 of the method regulating light source electric power according to an embodiment of the invention.Composition graphs 3 is described by Fig. 7.
In a step 702, light source (such as light-emitting diode chain 312) is energized, and the brightness of light-emitting diode chain 312 is adjusted to the first brightness value by the light adjusting controller 308 in light source driving circuit 300.In step 704, the mains switch (such as mains switch Q1) be coupled between AC power 320 in light source driving circuit 300 and rectifier 304 disconnects.In step 706, the startup of the break trigger timer 404 of mains switch Q1.In step 708, if timer 404 measures mains switch Q1 preset duration T upon opening
sTinterior conducting, performs step 710, otherwise, return step 702 to keep light-emitting diode chain 312 at the first brightness value.In step 720, the brightness of light-emitting diode chain 312 is adjusted to the second brightness value from the first brightness value.In step 712, mains switch Q1 disconnects again.In step 714, the startup of the disconnection of mains switch Q1 shot timers 404 again.In step 716, if timer 404 measures the preset duration T of mains switch Q1 after this disconnects
sTinterior conducting, returns step 702 so that the brightness of light-emitting diode chain 312 is adjusted to the first brightness value from the second brightness value, otherwise returning step 710 to keep the brightness of light-emitting diode chain 312 is the second brightness value.
Figure 8 shows that the flow chart 800 of the method regulating light source electric power according to an embodiment of the invention.Composition graphs 3 is described by Fig. 8.In step 802, the commutating voltage energy supply of light source (such as light-emitting diode chain 312) origin self-rectifying device 304.In step 804, light adjusting controller 308 receives the ON/OFF state of switch monitor signal of instruction mains switch Q1, wherein electric energy is transferred to rectifier 304 from AC power 320 by mains switch Q1, and the state of mains switch Q1 comprises conducting state and off-state.In step 806, if mains switch Q1 conducting, light adjusting controller 308 regulates average current to the first current value flowing through light source.In step 808, timer 404 measures mains switch Q1 from the time interval be disconnected to next time between conducting.In step 810, light adjusting controller 308 regulates according to switch monitors signal and time interval of measuring in step 808 the average current flowing through light source.In one embodiment, if the time interval that timer 404 measures be less than preset duration T
sT, the average current flowing through light source is adjusted to the second current value from the first current value.Otherwise, if timer 404 measure interval greater than preset duration T
sT, the average current flowing through light source remains on the first current value.
Advantageously, in this way, light source driving circuit of the present invention can regulate the electric energy of light source according to the ON/OFF state of switch monitor signal (such as with the lighting switch of the illuminated indicator of ON/OFF) of instruction mains switch.User can regulate the light output of light source by operating power switch, and does not need extra light modulation device (the having the switch regulating button of such as external dimmer device or customization), and cost reduces simultaneously.In addition, the light adjusting controller in light source driving circuit is still powered by the enable current path of illuminated indicator when mains switch is in off-state.Like this, light adjusting controller can be disconnected at mains switch and switched on again after, to change from the time interval be disconnected to next time between conducting according to mains switch or remember the brightness of light source.
Embodiment and accompanying drawing are only conventional embodiment of the present invention above.Obviously, various supplement, amendment and replacement can be had under the prerequisite not departing from the present invention's spirit that claims define and invention scope.It should be appreciated by those skilled in the art that the present invention can change in form, structure, layout, ratio, material, element, assembly and other side under the prerequisite not deviating from invention criterion according to concrete environment and job requirement in actual applications to some extent.Therefore, embodiment disclosed here is only illustrative rather than definitive thereof, and scope of the present invention is defined by claims and legal equivalents thereof, and the description before being not limited thereto.
Claims (19)
1. for regulating a light adjusting controller for light source, it is characterized in that, described light adjusting controller comprises:
Monitoring port, for receiving the ON/OFF state of switch monitor signal of instruction mains switch, electric energy is transferred to rectifier from AC power by wherein said mains switch, electric power converter receives input electric energy from described rectifier and provides output electric energy to described light source when described power switch conducts, and when described power switch conducts, the average current flowing through described light source is the first current value;
Control port, for providing control signal to regulate described average current according to described switch monitors signal, thus controls the brightness of described light source; And
Power port, for when described power switch conducts, receives the electric energy from described AC power by described mains switch, and when described mains switch disconnects, by the electric energy of illuminated indicator reception from described AC power.
2. light adjusting controller according to claim 1, it is characterized in that, if conducting again in mains switch preset duration upon opening described in described switch monitors signal designation, then described control port provide described control signal with by described average current from described first current value adjustment to the second current value.
3. light adjusting controller according to claim 1, it is characterized in that, conducting again after if the preset duration upon opening of mains switch described in described switch monitors signal designation stops, then described control port provides described control signal so that described average current is remained described first current value.
4. light adjusting controller according to claim 1, is characterized in that, described light adjusting controller also comprises:
Triggering monitoring means, for receiving described switch monitors signal, and correspondingly producing drive singal according to described switch monitors signal; And
Be coupled in the timer of described triggering monitoring means, controlled by described drive singal, for measuring described mains switch from the time interval be disconnected to next time between conducting.
5. light adjusting controller according to claim 4, is characterized in that, described light adjusting controller also comprises:
Be coupled in the reference signal generator of described timer, produce reference signal for the Output rusults according to described timer.
6. light adjusting controller according to claim 5, it is characterized in that, if the described time interval is less than preset duration, then described reference signal is adjusted to the second grade from the first estate by described reference signal generator, if and described interval greater than described preset duration, then described reference signal is remained on described the first estate by described reference signal generator.
7. light adjusting controller according to claim 5, is characterized in that, described light adjusting controller also comprises:
Amplifier, produce error signal for the induced signal being flowed through the described average current of described light source by more described reference signal and instruction, wherein said control signal is determined according to described error signal.
8. light adjusting controller according to claim 7, is characterized in that, described light adjusting controller also comprises:
Current monitoring port, flows through the current monitor signal of the electric current of described light source for receiving instruction; And
Be coupled in the filter of described current monitoring port, for producing described induced signal according to described current monitor signal.
9. a drive circuit, is characterized in that, described drive circuit comprises:
Electric power converter, provide export electric energy to light source for the input electric energy that receives from rectifier, wherein when the power switch conducts, the delivery of electrical energy from AC power is given described rectifier by described mains switch; And
Be coupled in the light adjusting controller of described electric power converter, for receiving the ON/OFF state of switch monitor signal indicating described mains switch, and the average current of described light source is flowed through according to described switch monitors Signal Regulation, thus regulate the brightness of described light source, wherein, when described power switch conducts, the described average current flowing through described light source is the first current value, when described mains switch disconnects, electric current flow to the ground of described drive circuit via the current path being coupled in described light adjusting controller from described AC power.
10. drive circuit according to claim 9, is characterized in that, described electric power converter comprises:
Be coupled in the control switch of described light source, described light adjusting controller is used for controlling described control switch according to described switch monitors signal, to regulate the described average current flowing through described light source, wherein, if conducting again in mains switch preset duration upon opening described in described switch monitors signal designation, then described light adjusting controller is used for described average current from described first current value adjustment to the second current value.
11. drive circuits according to claim 9, is characterized in that, described electric power converter comprises:
Be coupled in the control switch of described light source, described light adjusting controller is used for controlling described control switch according to described switch monitors signal, to regulate the described average current flowing through described light source, wherein, conducting again after if the preset duration upon opening of mains switch described in described switch monitors signal designation stops, then described light adjusting controller is used for described average current to remain on described first current value.
12. drive circuits according to claim 9, is characterized in that, described light adjusting controller comprises:
Trigger monitoring means, for receiving described switch monitors signal and correspondingly producing drive singal according to described switch monitors signal; And
Be coupled in the timer of described triggering monitoring means, controlled by described drive singal, for measuring described mains switch from the time interval be disconnected to next time between conducting.
13. drive circuits according to claim 12, is characterized in that, described light adjusting controller also comprises:
Be coupled in the reference signal generator of described timer, produce reference signal for the Output rusults according to described timer.
14. drive circuits according to claim 13, it is characterized in that, if the described time interval is less than preset duration, then described reference signal generator is used for described reference signal to be adjusted to the second grade from the first estate, if and described interval greater than described preset duration, then described reference signal generator be used for described reference signal is remained on described the first estate.
15. drive circuits according to claim 13, is characterized in that, described light adjusting controller also comprises:
Amplifier, produce error signal for the induced signal being flowed through the average current of described light source by more described reference signal and instruction, wherein said control signal is determined according to described error signal.
16. drive circuits according to claim 15, is characterized in that, described light adjusting controller also comprises:
Current inductor, for the current monitor signal providing instruction to flow through the electric current of described light source; And
Be coupled in the filter of described current inductor, for producing described induced signal according to described current monitor signal.
17. 1 kinds of methods regulating light source electric power, comprising:
Be used for self-rectifying device commutating voltage give described light source energy supply;
Receive the ON/OFF state of switch monitor signal of instruction mains switch, the delivery of electrical energy of AC power is given described rectifier by wherein said mains switch;
If described power switch conducts, then regulate average current to the first current value flowing through described light source;
Measure described mains switch from the time interval be disconnected to next time between conducting; And
The described average current flowing through described light source is adjusted according to described switch monitors signal and the described time interval.
18. methods according to claim 17, is characterized in that, described method also comprises:
If the described time interval is less than preset duration, then when described power switch conducts, by described average current from described first current value adjustment to the second current value.
19. methods according to claim 17, is characterized in that, described method also comprises:
If described interval greater than preset duration, then when described power switch conducts, described average current is remained on described first current value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/509,711 US9253843B2 (en) | 2008-12-12 | 2014-10-08 | Driving circuit with dimming controller for driving light sources |
| US14/509,711 | 2014-10-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105517275A true CN105517275A (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510641716.4A Pending CN105517275A (en) | 2014-10-08 | 2015-09-30 | A driving circuit, a dimming controller and a method for adjusting power of a light source |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3007521A3 (en) |
| CN (1) | CN105517275A (en) |
| TW (1) | TWI593313B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019047146A1 (en) * | 2017-09-08 | 2019-03-14 | 刘远芳 | Direct-adjustment dimming device and corresponding direct-adjustment dimming illumination system, and direct-adjustment dimming method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014065389A1 (en) | 2012-10-25 | 2014-05-01 | Semiconductor Energy Laboratory Co., Ltd. | Central control system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548143A (en) * | 2011-12-28 | 2012-07-04 | 凹凸电子（武汉）有限公司 | Drive circuit, dimmer controller and method for electrically controlling light-emitting diode (LED) light source |
| CN203313463U (en) * | 2013-05-03 | 2013-11-27 | 深圳市雷达光电科技有限公司 | DC power supply system of indoor LED lighting lamps |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IN2012DE00931A (en) * | 2011-12-28 | 2015-09-04 | 02 Micro Inc |
-
2015
- 2015-06-29 EP EP15174194.9A patent/EP3007521A3/en not_active Withdrawn
- 2015-09-30 CN CN201510641716.4A patent/CN105517275A/en active Pending
- 2015-10-02 TW TW104132552A patent/TWI593313B/en active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548143A (en) * | 2011-12-28 | 2012-07-04 | 凹凸电子（武汉）有限公司 | Drive circuit, dimmer controller and method for electrically controlling light-emitting diode (LED) light source |
| CN203313463U (en) * | 2013-05-03 | 2013-11-27 | 深圳市雷达光电科技有限公司 | DC power supply system of indoor LED lighting lamps |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019047146A1 (en) * | 2017-09-08 | 2019-03-14 | 刘远芳 | Direct-adjustment dimming device and corresponding direct-adjustment dimming illumination system, and direct-adjustment dimming method |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201622488A (en) | 2016-06-16 |
| EP3007521A3 (en) | 2016-06-01 |
| EP3007521A2 (en) | 2016-04-13 |
| TWI593313B (en) | 2017-07-21 |
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Application publication date: 20160420 |