CN102374448B - Illumination device - Google Patents
Illumination device Download PDFInfo
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- CN102374448B CN102374448B CN201010250721.XA CN201010250721A CN102374448B CN 102374448 B CN102374448 B CN 102374448B CN 201010250721 A CN201010250721 A CN 201010250721A CN 102374448 B CN102374448 B CN 102374448B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention relates to an illumination device which comprises an LED (light emitting diode) module, a power factor correcting circuit, a non-regulation-type isolation-type direct-current converter and a regulation-type isolation-type direct-current converter, wherein the LED module is provided with a plurality of LEDs; the power factor correcting circuit is used for power factor correcting for an alternating current power supply, and outputting a corrected direct-current voltage; the non-regulation-type isolation-type direct-current converter is used for generating an output voltage in the fixed voltage range according to the corrected direct-current voltage, wherein the non-regulation-type isolation-type direct-current converter is of open loop control; and the regulation-type isolation-type direct-current converter is used for generating fixed current or fixed voltage according to the output voltage so as to drive the LED module. The illumination device provided by the invention has low cost, small dimension, light weight and less power consumption.
Description
Technical field
The present invention relates to lighting device, relate in particular to a kind of lighting device with plural light-emitting diode (LED) module.
Background technology
The characteristic of long, light and handy, low power consumption of, life-span durable owing to having and do not contain hazardous substance (for example mercury), is therefore used the lighting engineering of light emitting diode (LED) to become Lighting Industry and semiconductor industry very important developing direction in future.For example, light emitting diode is widely used in the backlight module of white light illumination device, indicator lamp, vehicle-used signal lamp, headlight for vehicle, flash lamp, liquid crystal display, the light source of projector, outdoor display unit (for example street lamp, signboard, outdoor application backlight) ... etc.
Current light-emitting diode illumination source cannot direct control under AC power, therefore need to use a power system in order to according to AC power, drive light-emitting diode illumination source.But this power system can increase cost, the dimension and weight of lighting device and consume more electric energy.Therefore, need a kind of new power system to overcome these problems.
Summary of the invention
The object of this invention is to provide a kind of lighting device, in order to overcome the existing lighting device cost driving with power system, dimension and weight increase, to consume more defect.
The invention provides a kind of lighting device, comprise at least one light-emitting diode (LED) module, each light-emitting diode (LED) module comprises plural light emitting diode; One power factor correction circuit, in order to an AC power is carried out to power factor correcting, and exports the DC voltage after a correction; One non-modulated type isolated DC converter, in order to according to the DC voltage after proofreading and correct, produces the output voltage in a set voltage range, and wherein non-modulated type isolated DC converter is out the direct current transducer of circuit controls and buck; And the non-isolated direct current transducer of at least one adjustment type, in order to the output voltage of exporting according to non-modulated type isolated DC converter, produce a fixed current or a fixed voltage, to drive light-emitting diode (LED) module.
The invention provides a kind of lighting device, comprise a non-modulated type isolated DC converter, DC voltage after proofreading and correct from one of a power factor correction circuit in order to basis, produce the output voltage in a set voltage range, wherein non-modulated type isolated DC converter is out the direct current transducer of circuit controls and buck, and comprises DC voltage and output voltage after one first transformer is proofreaied and correct in order to electrical isolation; Plural number light-emitting diode (LED) module, each light-emitting diode (LED) module comprises plural light emitting diode; And the non-isolated direct current transducer of plural adjustment type, in order to the output voltage of exporting according to non-modulated type isolated DC converter, produce a fixed current or a fixed voltage, to drive light-emitting diode (LED) module.
The present invention also provides a kind of lighting device, comprises a light-emitting diode (LED) module, and described light-emitting diode (LED) module comprises plural light emitting diode; One power factor correction circuit, in order to an AC power is carried out to power factor correcting, and exports the DC voltage after a correction; One non-modulated type isolated DC converter, in order to according to the DC voltage after proofreading and correct, produces an output voltage, and wherein non-modulated type isolated DC converter, for opening circuit controls, makes output voltage not be adjusted in a fixed value; And the non-isolated direct current transducer of an adjustment type, in order to the output voltage of exporting according to non-modulated type isolated DC converter, produce a fixed current or a fixed voltage, to drive above-mentioned light-emitting diode (LED) module, wherein non-modulated type isolated DC converter comprises DC voltage and the output voltage after one first transformer is proofreaied and correct in order to electrical isolation, but the non-isolated direct current transducer of adjustment type does not comprise transformer.
In the present invention, because the non-modulated type isolated DC converter that only need open circuit controls and auto-excitation type control design carrys out the DC voltage after processing power factor correction circuit is proofreaied and correct, the regulation isolated type DC-DC converter of controlling than loop circuit can be promoted in efficiency.Meanwhile, owing to not needing to feedback control, simpler in circuit design, the volume of power-supply system also can reduce and cost also can reduce.
brief description of the drawings
The present invention can follow with embodiment appended graphic and be understood, appended graphic be also a part of embodiment.Those skilled in the art can understand the present patent application the scope of the claims should be assert to include embodiments of the invention and modification thereof largo, wherein:
Fig. 1 is the structured flowchart of an embodiment of lighting device of the present invention;
Fig. 2 is the structural representation of an embodiment of power factor correction circuit of the present invention;
Fig. 3 is the structural representation of an embodiment of regulation isolated type DC-DC converter of the present invention;
Fig. 4 is the structural representation of an embodiment of the non-isolated direct current transducer of adjustment type of the present invention;
Fig. 5 is the structured flowchart of another embodiment of lighting device of the present invention;
Fig. 6 A is the structural representation of the first embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 B is the structural representation of the second embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 C is the structural representation of the 3rd embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 D is the structural representation of the 4th embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 E is the structural representation of the 5th embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 F is the structural representation of the 6th embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 G is the structural representation of the 7th embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 H is the structural representation of the 8th embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 I is the structural representation of non-modulated type isolated DC converter of the present invention the 9th embodiment;
Fig. 6 J is the structural representation of the tenth embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 K is the structural representation of non-modulated type isolated DC converter of the present invention the 11 embodiment;
Fig. 6 L is the structural representation of the 12 embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 7 A is the structural representation of an embodiment of the rectification circuit in non-modulated type isolated DC converter of the present invention;
Fig. 7 B is the structural representation of another embodiment of the rectification circuit in non-modulated type isolated DC converter of the present invention;
Fig. 7 C is the structural representation of the another embodiment of the rectification circuit in non-modulated type isolated DC converter of the present invention;
Fig. 7 D is the structural representation of an embodiment again of the rectification circuit in non-modulated type isolated DC converter of the present invention.
Primary clustering symbol description:
10,10 ": power factor correction circuit; 100,200: lighting device;
40,40 ", 40A: light-emitting diode (LED) module; R1～R39, R101: resistance;
C1～C34, C101～C104: electric capacity; L1～L5: inductance;
CT1～CT3: controller; ZD1～ZD8: Zener diode;
D1～D20, D101～D108: diode; S1～S3, SW1～SW4: switch module;
T1, T101～T103: transformer; Q1～Q6: double carrier transistor;
VOUT: output voltage; VIN: input voltage;
20: regulation isolated type DC-DC converter;
20 ", 20A～20L: non-modulated type isolated DC converter;
30,30 ": the non-isolated direct current transducer of adjustment type;
M1～M6: metal oxide semiconductcor field effect transistor.
Detailed description of the invention
Fig. 1 is the structured flowchart of an embodiment of lighting device of the present invention.As shown in Figure 1, lighting device 100 comprises a power factor correction circuit (power factor correction circuit) 10, a regulation isolated type DC-DC converter (regulated isolation DC to DC converter) 20, the non-isolated direct current transducer of an adjustment type (regulated non-isolation DC to DC converter) 30 and a light-emitting diode (LED) module 40.In certain embodiments, the non-isolated direct current transducer 30 of adjustment type can be all multiple with the number of light-emitting diode (LED) module 40.For example, lighting device 100 can be an outdoor display unit, for example street lamp, signboard, outdoor application backlight ... etc., but be not limited to this.Lighting device 100 can be backlight module, the projector of indicator lamp, vehicle-used signal lamp, headlight for vehicle, flash lamp, liquid crystal display light source ... etc.
Power factor correction circuit 10, regulation isolated type DC-DC converter 20 and the non-isolated direct current transducer 30 of adjustment type form a power system of lighting device 100.Power factor correction circuit 10 carries out power factor correcting in order to receive an AC power, to meet the requirement of IEC6100-3-2 Class C to Harmonics of Input distortion, for example total current harmonic distortion be less than 33% and power factor be greater than 0.9.For example, the AC power that power factor correction circuit 10 receives can be 120～277VAC (U.S.'s specification), 220～240VAC (European Union or Chinese specification) or 100VAC (Japanese specification), but is not limited to this.Power factor correction circuit 10 can be made up of boost converter (boost converter), step-down controller (buck converter) and the one in type of voltage step-up/down converter (bust-boost converter) the power factor correction controller of arranging in pairs or groups.
DC voltage after regulation isolated type DC-DC converter 20 is proofreaied and correct in order to received power factor correction circuit 10, produces the output voltage of an isolation, stable and direct current to the non-isolated direct current transducer 30 of adjustment type.For example, regulation isolated type DC-DC converter 20 is in order to produce the DC voltage that is fixed as 12V or 24V.In other words, regulation isolated type DC-DC converter 20 is a step-down type dc converter.Regulation isolated type DC-DC converter 20 can be made up of the pulse width modulation controller (PWM controller) of arranging in pairs or groups of the one in flyback isolating converter (flyback isolated converter) and forward type isolating converter (forward isolated converter), to reach the requirement of regulated output voltage.Note what is called " isolated " direct current transducer refers to that direct current transducer has at least one transformer input voltage and output voltage are separated.
The non-isolated direct current transducer 30 of adjustment type is as a LED drive, the DC voltage of exporting in order to receive regulation isolated type DC-DC converter 20, produce a fixed current or fixed voltage to light-emitting diode (LED) module 40, so that light-emitting diode (LED) module 40 is luminous.For example, the non-isolated direct current transducer 30 of adjustment type is determined electric current (DC current) in order to what produce 350mA or 700mA.The non-isolated direct current transducer 30 of adjustment type is formed by boost converter (boost converter), step-down controller (buck converter) and the one in type of voltage step-up/down converter (bust-boost converter) pulse width modulation controller of arranging in pairs or groups, to reach the requirement of stabilizing output current control.
Each of light-emitting diode (LED) module 40 can form a module by many light emitting diode serial or parallel connections, and in order to the demand of brightness, and light-emitting diode (LED) module 40 determines under electric current for operating in, and its required voltage can be higher or lower than input voltage.In Fig. 1, only show a light-emitting diode (LED) module 40, but for example, in some application (outdoor signboard or outdoor back lighting), lighting device 100 also can comprise the non-isolated direct current transducer of multiple adjustment types (LED drive) 30 and multiple light-emitting diode (LED) modules 40.Each light-emitting diode (LED) module 40 works alone, and is not subject to the impact of other light-emitting diode (LED) module 40.In some instances, light-emitting diode (LED) module 40 also can be formed by many light emitting diode micromeritics serial or parallel connections, but is not limited to this.
Fig. 2 is the structural representation of an embodiment of power factor correction circuit of the present invention.As shown in Figure 2, power factor correction circuit 10 is made up of resistance R 1～R15, capacitor C 1～C11, inductance L 1～L3, diode D1～D7, switch module S1 and controller CT1.Fig. 3 is the structural representation of an embodiment of regulation isolated type DC-DC converter of the present invention.Regulation isolated type DC-DC converter is made up of transistor Q101, resistance R 16～R30, capacitor C 12～C23, inductance L 4, transformer T1, diode D8～D16 and D19, photo-coupler (photo coupler) D17 and D18, switch module S2 and controller CT2.Fig. 4 is the structural representation of an embodiment of the non-isolated direct current transducer of adjustment type of the present invention.The non-isolated direct current transducer 30 of adjustment type is as a LED drive, and is made up of resistance R 31～R39, capacitor C 24～C34, inductance L 5, diode D20, switch module S3 and controller CT3, in order to drive LED lighting module 40A.
In order further to promote the efficiency of power system (being power factor correction circuit 10, regulation isolated type DC-DC converter 20 and the non-isolated direct current transducer 30 of adjustment type), the structured flowchart of another embodiment that Fig. 5 is lighting device of the present invention.As shown in Figure 5, lighting device 200 comprises a power factor correction circuit 10 ", a non-modulated type isolated DC converter 20 ", the non-isolated direct current transducer 30 of adjustment type " and light-emitting diode (LED) module 40 ", wherein power factor correction circuit 10 " and light-emitting diode (LED) module 40 " action similar to the power factor correction circuit 10 shown in Fig. 1 and light-emitting diode (LED) module 40, therefore be not repeated in this.In certain embodiments, the non-isolated direct current transducer 30 of adjustment type " with light-emitting diode (LED) module 40 " number also can be all 1.
Be noted that, in this embodiment, be non-modulated type isolated DC converter 20 with regulation isolated type DC-DC converter 20 differences shown in Fig. 1 " in order to produce unfixed (float) output voltage in a set voltage range to the non-isolated direct current transducer 30 of adjustment type.In certain embodiments, set voltage range is defined by a higher limit and lower limit, higher limit and lower limit represent respectively non-modulated type isolated DC direct current conversion 20 " load voltage value of device while operating in a full load condition and a Light Condition, and the difference of higher limit and lower limit is less than 100.For example, this set voltage range can be 0～100V, but is not limited to this.In other words, non-modulated type isolated DC converter 20 " output voltage that produces can be any one in 5V, 10V, 50V or 0V to 100V.Therefore, non-modulated type isolated DC converter 20 " what export is a revocable output voltage, the output voltage that is fixed as 12V or 24V from 20 outputs of regulation isolated type DC-DC converter is different.The non-isolated direct current transducer 30 of adjustment type is as LED drive, in order to receive non-modulated type isolated DC converter 20 " revocable DC voltage of exporting, produce a fixed current or a fixed voltage to corresponding light-emitting diode (LED) module 40 ".
In the present embodiment, non-modulated type isolated DC converter 20 " can be a step-down controller and there is the symmetrical work period, meaning is that primary side is identical with the work period of secondary side.For example, non-modulated type isolated DC converter 20 " can be one and open semibridge system isolating converter (half-bridge isolated converter) or the full-bridge type isolating converter (full-bridge isolated converter) of circuit controls and/or auto-excitation type control design.In other words,, in this embodiment, need, by a pulse width modulation controller according to output voltage, switch module not feedback control and output voltage is maintained to a fixed voltage.In the application of 180 watts, open the non-modulated type isolated DC converter 20 that the semibridge system isolating converter of circuit controls and auto-excitation type control design is realized " control flyback isolating converter than loop circuit can promote 5% in efficiency.Meanwhile, owing to not needing pulse width modulation controller to feedback control, make circuit design simpler, the volume of power-supply system also can reduce 30% and cost also can reduce.
Fig. 6 A is the structural representation of the first embodiment of non-modulated type isolated DC converter of the present invention.As shown in Figure 6A, non-modulated type isolated DC converter 20A is an auto-excitation type and the semibridge system direct current transducer of opening circuit controls, and the voltage exported of non-modulated type isolated DC converter 20A is non-adjusting.For example, non-modulated type isolated DC converter 20A is in order to received power factor correction circuit 10 " voltage exported, produce a revocable output voltage VO UT lower than 60V.For example, in the time that AC power is 220～240VAC, power factor correction circuit 10 " voltage the exported DC voltage that is 400V.If when AC power is 120～277VAC, power factor correction circuit 10 " voltage the exported DC voltage that is 450V.Moreover the work period of non-modulated type isolated DC converter 20A primary side and secondary side is symmetrical.The output voltage VO UT of non-modulated type isolated DC converter 20A can be lower than input voltage VIN, and can be along with load change.For example, work as full load, output voltage VO UT can be on the low side, and in the time of underloading, output voltage VO UT can be higher.
Non-modulated type isolated DC converter 20A is made up of capacitor C 101～C104, diode D101～D104, transformer T101～T102 and switch module SW1～SW2, wherein diode D101 and D102 and electric capacity form a rectification circuit, and diode D103 and D104, resistance R 101 and capacitor C 104 form a start-up circuit.Switch module SW1 and SW2 can be two-way admittance assembly (for example MOSFET), also can be the combination of one-way conduction assembly (IGBT or BJT) and diode.For example, diode D101 and D102 are commutation diode, and diode D104 is a two-way admittance thyristor (DIAC).Capacitor C 1 is storage capacitors with C2, can be electrochemical capacitor or plastics electric capacity, but is not limited to this.Transformer T101 is an isolating transformer, and transformer T102 is the driving transformer of switch module SW1 and SW2, can be saturation type transformer or unsaturation formula transformer.
Capacitor C 101 has a first end and is coupled to the anode of input voltage VIN, and one second end is coupled to capacitor C 102.Capacitor C 102 has a first end and is coupled to the second end of capacitor C 101, and one second end is coupled to the negative terminal (being earthing potential) of input voltage VIN.The first siding ring of transformer T101 has a first end and is coupled to the second end of capacitor C 102, and one second end is coupled to transformer T102.The second siding ring of transformer T101 has a first end and is coupled to the negative electrode of diode D101, and one second end is coupled to the negative electrode of diode D102.Capacitor C 103 has a first end and is coupled to the anode of diode D101 and D102, and one second end is coupled to the centre cap of the second siding ring of transformer T101.The rectification circuit that diode D101 and D102 and capacitor C 103 form, in order to become DC voltage to be stored in capacitor C 103 ac voltage rectifier producing on the second siding ring of transformer T101.
Switch module SW1 has a first end and is coupled to the first end of capacitor C 101, and one second end is coupled to switch module SW2.Switch module SW2 has a first end and is coupled to the second end of switch module SW1, and one second end is coupled to earthing potential.Transformer T102 is coupled between transformer T101 and switch module SW1～SW2, and has three groups of coils, and main coil is coupled to transformer T101, and first, second coil is respectively in order to driving switch assembly SW1 and SW2.For example, the two ends of the first coil are coupled to respectively control end and the second end of switch module SW1, and the two ends of the second coil are coupled to respectively control end and the second end of switch module SW2.In this embodiment, switch module SW1 has identical ON time (meaning is symmetric periodic) with SW2.For example, the switching frequency of switch module SW1 and SW2, between 20KHz to 33KHz or more than 40KHz, to avoid the frequency range of infrared remote controller, but is not limited to this.In addition, this switching frequency also can change along with load, works as full load, and switching frequency is on the low side, and in the time of underloading, switching frequency is higher.
Resistance R 101 has a first end and is coupled to the first end of switch module SW1, and one second end is coupled to the anode of diode D103, and the negative electrode of diode D103 is coupled to the second end of switch module SW1.Diode D104 has a first end and is coupled to the second end of resistance R 101 and one second end and is coupled to the control end of switch module SW2, is coupled to earthing potential and capacitor C 104 has first end and one second end that a first end is coupled to diode D104.
Input voltage VIN can be charged to capacitor C 104 by resistance R 101, for example, in the time that the stored voltage of capacitor C 104 is greater than a set voltage (32V), diode D104 is breakdown, make capacitor C 104 produce discharge current by diode D104, and by switch module SW2 conducting, to reach the object of startup.By switch module SW1 and the conducting of SW2 alternately, input voltage VIN can convert high-frequency ac square wave on the first siding ring of transformer T101.After switch module SW1 and the conducting of SW2 alternately, the voltage in capacitor C 104 can discharge by switch module SW2, therefore diode D104 can not cause restarting.
Because switch module SW1 and SW2 in non-modulated type isolated DC converter 20A are controlled by the voltage on first, second coil across transformer T102, therefore be an auto-excitation type and the semibridge system direct current transducer of opening circuit controls.As from the foregoing, power system of the present invention can supply power to multi-group light-emitting diode module, and does not need to use a controller (for example pulse width modulation controller) to carry out the control of loop circuit, and output voltage VO UT is controlled to a fixed value.Therefore, circuit design is can be more simple, cost is lower, and the volume of power system also can reduce 30%.Moreover, controlling flyback isolating converter than loop circuit, non-modulated type isolated DC converter 20A can make power system in efficiency, promote 5%.
Fig. 6 B is the structural representation of the second embodiment of non-modulated type isolated DC converter of the present invention.As shown in Figure 6B, non-modulated type isolated DC converter 20B is similar to person shown in Fig. 6 A, its difference is that switch module SW1 is with metal oxide semiconductcor field effect transistor (MOSFET) M1 and Zener diode ZD1 and ZD2 replacement, and switch module SW2 is with metal oxide semiconductcor field effect transistor M2 and Zener diode ZD3 and ZD4 replacement.Metal oxide semiconductcor field effect transistor M1 is coupled between the anode of input voltage VIN and the first end of metal oxide semiconductcor field effect transistor M2, and metal oxide semiconductcor field effect transistor M2 is coupled to and the second end and the negative terminal of input voltage VIN of metal oxide semiconductcor field effect transistor M1 between.The two ends of the first coil of transformer T102 are coupled to respectively control end and the second end of metal oxide semiconductcor field effect transistor M1, and the two ends of the second coil of transformer T102 are coupled to respectively control end and the second end of metal oxide semiconductcor field effect transistor M2.Zener diode ZD1 and anti-phase ground of ZD2 coupled in series are between the control end and the second end of metal oxide semiconductcor field effect transistor M1, and Zener diode ZD3 and anti-phase ground of ZD4 coupled in series are between the control end and the second end of metal oxide semiconductcor field effect transistor M2.The action of non-modulated type isolated DC converter 20B is similar to person shown in Fig. 6 A, therefore be not repeated in this.
Fig. 6 C is the structural representation of the 3rd embodiment of non-modulated type isolated DC converter of the present invention.As shown in Figure 6 C, non-modulated type isolated DC converter 20C is similar to person shown in Fig. 6 A, its difference is that switch module SW1 replaces with double carrier transistor Q1 and diode D105, and switch module SW2 replaces with double carrier transistor Q2 and diode D106.Double carrier transistor Q1 is coupled between the anode of input voltage VIN and the colelctor electrode of double carrier transistor Q2, and double carrier transistor Q2 is coupled to and the emitter stage of double carrier transistor Q1 and the negative terminal of input voltage VIN between.The two ends of the first coil of transformer T102 are coupled to respectively base stage and the emitter stage of double carrier transistor Q1, and the two ends of the second coil of transformer T102 are coupled to respectively base stage and the emitter stage of double carrier transistor Q2.The negative electrode and positive electrode of diode D105 is respectively coupled to colelctor electrode and the emitter stage of double carrier transistor Q1, and the negative electrode and positive electrode of diode D106 is respectively coupled to colelctor electrode and the emitter stage of double carrier transistor Q2.The action of non-modulated type isolated DC converter 20C is similar to person shown in Fig. 6 A, therefore be not repeated in this.
Fig. 6 D is the structural representation of the 4th embodiment of non-modulated type isolated DC converter of the present invention.As shown in Figure 6 D, non-modulated type isolated DC converter 20D is similar to person shown in Fig. 6 A, and its difference is that switch module SW1 and SW2 are driven by the voltage on the coil of transformer T101, but not transformer T102.
Fig. 6 E is the structural representation of the 5th embodiment of non-modulated type isolated DC converter of the present invention.As shown in Fig. 6 E, non-modulated type isolated DC converter 20E is similar to person shown in Fig. 6 B, and its difference is that metal oxide semiconductcor field effect transistor M1 and M2 are driven by the voltage on the coil of transformer T101, but not transformer T102.
Fig. 6 F is the structural representation of the 6th embodiment of non-modulated type isolated DC converter of the present invention.As shown in Fig. 6 F, non-modulated type isolated DC converter 20F is similar to person shown in Fig. 6 C, and its difference is that double carrier transistor Q1 and Q2 are driven by the voltage on the coil of transformer T101, but not transformer T102.
Fig. 6 G is the structural representation of the 7th embodiment of non-modulated type isolated DC converter of the present invention.As shown in Figure 6 G, non-modulated type isolated DC converter 20G is similar to person shown in Fig. 6 A, its difference is that capacitor C 101 and C102 are replaced by switch module SW3 and SW4 respectively, and making non-modulated type isolated DC converter 20G is an auto-excitation type and the full-bridge type direct current transducer of opening circuit controls.Now, transformer T102 has five groups of coils, and main coil is coupled to transformer T101, and first to fourth coil is respectively in order to driving switch assembly SW1～SW4.For example, the two ends of the first coil are coupled to respectively control end and the second end of switch module SW1, the two ends of the second coil are coupled to respectively control end and the second end of switch module SW2, the two ends of tertiary coil are coupled to respectively control end and the second end of switch module SW3, and the two ends of the second coil are coupled to respectively control end and the second end of switch module SW4.
Input voltage VIN can be charged to capacitor C 104 by resistance R 101, for example, in the time that the stored voltage of capacitor C 104 is greater than a set voltage (32V), diode D104 is breakdown, make capacitor C 104 produce discharge current by diode D104, and switch module SW2 and SW3 conducting are reached to the object of startup.By transformer T102 alternately actuating switch assembly SW1 and SW4 and SW2 and SW3, input voltage VIN can convert high-frequency ac square wave on the first siding ring of transformer T101.After switch module SW1 and SW4 and SW2 and the conducting of SW3 alternately, the voltage in capacitor C 104 can discharge by switch module SW2, therefore diode D104 can not cause restarting.In this embodiment, all driven by the voltage on the coil of transformer T102 at switch module SW1～SW4, for example, therefore do not need to use a controller (pulse width modulation controller) to come according to output voltage VO UT, switch module SW1～SW4 carried out to the control of loop circuit.
Fig. 6 H is the structural representation of the 8th embodiment of non-modulated type isolated DC converter of the present invention.As shown in Fig. 6 H, non-modulated type isolated DC converter 20H is similar to person shown in Fig. 6 G, its difference is that switch module SW1 is with metal oxide semiconductcor field effect transistor M1 and Zener diode ZD1 and ZD2 replacement, switch module SW2 is with metal oxide semiconductcor field effect transistor M2 and Zener diode ZD3 and ZD4 replacement, switch module SW3 is with metal oxide semiconductcor field effect transistor M3 and Zener diode ZD5 and ZD6 replacement, and switch module SW4 is with metal oxide semiconductcor field effect transistor M4 and Zener diode ZD7 and ZD8 replacement.Metal oxide semiconductcor field effect transistor M1 is coupled between the anode of input voltage VIN and the first end of metal oxide semiconductcor field effect transistor M2, and metal oxide semiconductcor field effect transistor M2 is coupled to and the second end and the negative terminal of input voltage VIN of metal oxide semiconductcor field effect transistor M1 between.Metal oxide semiconductcor field effect transistor M3 is coupled between the anode of input voltage VIN and the first end of metal oxide semiconductcor field effect transistor M4, and metal oxide semiconductcor field effect transistor M4 is coupled to and the second end and the negative terminal of input voltage VIN of metal oxide semiconductcor field effect transistor M3 between.The two ends of the first coil of transformer T102 are coupled to respectively control end and the second end of metal oxide semiconductcor field effect transistor M1, and the two ends of the second coil of transformer T102 are coupled to respectively control end and the second end of metal oxide semiconductcor field effect transistor M2.The two ends of the tertiary coil of transformer T102 are coupled to respectively control end and the second end of metal oxide semiconductcor field effect transistor M3, and the two ends of the 4th coil of transformer T102 are coupled to respectively control end and the second end of metal oxide semiconductcor field effect transistor M4.Zener diode ZD1 and anti-phase ground of ZD2 coupled in series are between the control end and the second end of metal oxide semiconductcor field effect transistor M1, and Zener diode ZD3 and anti-phase ground of ZD4 coupled in series are between the control end and the second end of metal oxide semiconductcor field effect transistor M2.Zener diode ZD5 and anti-phase ground of ZD6 coupled in series are between the control end and the second end of metal oxide semiconductcor field effect transistor M3, and Zener diode ZD7 and anti-phase ground of ZD8 coupled in series are between the control end and the second end of metal oxide semiconductcor field effect transistor M4.The action of non-modulated type isolated DC converter 20B is similar to person shown in Fig. 6 G, therefore be not repeated in this.
Fig. 6 I is the structural representation of the 9th embodiment of non-modulated type isolated DC converter of the present invention.As shown in Fig. 6 I, non-modulated type isolated DC converter 20I is similar to person shown in Fig. 6 G, its difference is that switch module SW1 replaces with double carrier transistor Q1 and diode D105, switch module SW2 replaces with double carrier transistor Q2 and diode D106, switch module SW2 replaces with double carrier transistor Q3 and diode D107, and switch module SW4 replaces with double carrier transistor Q4 and diode D108.Double carrier transistor Q1 is coupled between the anode of input voltage VIN and the colelctor electrode of double carrier transistor Q2, and double carrier transistor Q2 is coupled to and the emitter stage of double carrier transistor Q1 and the negative terminal of input voltage VIN between.Double carrier transistor Q3 is coupled between the anode of input voltage VIN and the colelctor electrode of double carrier transistor Q4, and double carrier transistor Q4 is coupled to and the emitter stage of double carrier transistor Q3 and the negative terminal of input voltage VIN between.The two ends of the first coil of transformer T102 are coupled to respectively base stage and the emitter stage of double carrier transistor Q1, and the two ends of the second coil of transformer T102 are coupled to respectively base stage and the emitter stage of double carrier transistor Q2.The two ends of the tertiary coil of transformer T102 are coupled to respectively base stage and the emitter stage of double carrier transistor Q3, and the two ends of the 4th coil of transformer T102 are coupled to respectively base stage and the emitter stage of double carrier transistor Q4.The negative electrode and positive electrode of diode D105 is respectively coupled to colelctor electrode and the emitter stage of double carrier transistor Q1, and the negative electrode and positive electrode of diode D106 is respectively coupled to colelctor electrode and the emitter stage of double carrier transistor Q2.The negative electrode and positive electrode of diode D107 is respectively coupled to colelctor electrode and the emitter stage of double carrier transistor Q3, and the negative electrode and positive electrode of diode D108 is respectively coupled to colelctor electrode and the emitter stage of double carrier transistor Q4.The action of non-modulated type isolated DC converter 20I is similar to person shown in Fig. 6 G, therefore be not repeated in this.
Fig. 6 J is the structural representation of the tenth embodiment of non-modulated type isolated DC converter of the present invention.As shown in Fig. 6 J, non-modulated type isolated DC converter 20J is similar to person shown in Fig. 6 G, and its difference is that switch module SW1～SW4 is driven by the voltage on the coil of transformer T101, but not transformer T102.
Fig. 6 K is the structural representation of the 11 embodiment of non-modulated type isolated DC converter of the present invention.As shown in Fig. 6 K, non-modulated type isolated DC converter 20K is similar to person shown in Fig. 6 H, and its difference is that metal oxide semiconductcor field effect transistor M1～M4 is driven by the voltage on the coil of transformer T101, but not transformer T102.
Fig. 6 L is the structural representation of the 12 embodiment of non-modulated type isolated DC converter of the present invention.As shown in Fig. 6 L, non-modulated type isolated DC converter 20L is similar to person shown in Fig. 6 I, and its difference is that double carrier transistor Q1～Q4 is driven by the voltage on the coil of transformer T101, but not transformer T102.
Fig. 7 A is the structural representation of an embodiment of the rectification circuit in non-modulated type isolated DC converter of the present invention.As shown in Figure 7 A, this rectification circuit is similar to person shown in Fig. 6 A, its difference is also to comprise metal oxide semiconductcor field effect transistor M5 and M6, wherein metal oxide semiconductcor field effect transistor M5 has a first end and is coupled to the negative electrode of diode D101, one second end couples the anode as for diode D101, and one control end couple the second end of the second siding ring of transformer T101, and having a first end, metal oxide semiconductcor field effect transistor M6 is coupled to the negative electrode of diode D102, one second end couples the anode as for diode D102, and one control end couple the first end of the second siding ring of transformer T101.In other words,, in non-modulated type isolated DC converter, metal oxide semiconductcor field effect transistor M5 and M6 and switch module SW1～SW4 are driven by the voltage on the coil of transformer T101.
Fig. 7 B is the structural representation of another embodiment of the rectification circuit in non-modulated type isolated DC converter of the present invention.As shown in Figure 7 B, this rectification circuit is similar to person shown in Fig. 7 A, its difference is that metal oxide semiconductcor field effect transistor M5 replaces with double carrier transistor Q5, and metal oxide semiconductcor field effect transistor M6 replaces with double carrier transistor Q6, wherein double carrier transistor Q5 has a colelctor electrode and is coupled to the negative electrode of diode D101, one emitter stage couples the anode as for diode D101, and one base stage couple the second end of the second siding ring of transformer T101, and having a colelctor electrode, double carrier transistor Q6 is coupled to the negative electrode of diode D102, one emitter stage couples the anode as for diode D102, and one base stage couple the first end of the inferior lateral coil of transformer T101.In other words,, in non-modulated type isolated DC converter, double carrier transistor Q5 and Q6 and switch module SW1～SW4 are all driven by the voltage on the coil of transformer T101.
Fig. 7 C is the structural representation of the another embodiment of the rectification circuit in non-modulated type isolated DC converter of the present invention.As shown in Fig. 7 C, this rectification circuit is similar to person shown in Fig. 7 A, and its difference is also to comprise a transformer T103, in order to drive metal oxide semiconductcor field effect transistor M5 and M6.Transformer T103 has a main coil and is coupled to the centre cap of the secondary side of transformer T101, and one first coil is in order to drive metal oxide semiconductcor field effect transistor M5, and one second coil is in order to drive metal oxide semiconductcor field effect transistor M6.The two ends of the first coil couple respectively control end and the second end of metal oxide semiconductcor field effect transistor M5, and the two ends of one second coil are coupled to respectively control end and the second end of metal oxide semiconductcor field effect transistor M6.In other words, metal oxide semiconductcor field effect transistor M5 and M6 are driven by the voltage on the coil of transformer T103.
Fig. 7 D is the structural representation of an embodiment again of the rectification circuit in non-modulated type isolated DC converter of the present invention.As shown in Fig. 7 D, this rectification circuit bag is similar to person shown in Fig. 7 C, its difference is that metal oxide semiconductcor field effect transistor M5 replaces with double carrier transistor Q5, and metal oxide semiconductcor field effect transistor M6 replaces with double carrier transistor Q6, wherein double carrier transistor Q5 has a colelctor electrode and is coupled to the negative electrode of diode D101, one emitter stage couples the anode as for diode D101, and one base stage couple the second end of the second siding ring of transformer T101, and having a colelctor electrode, double carrier transistor Q6 is coupled to the negative electrode of diode D102, one emitter stage couples the anode as for diode D102, and one base stage couple the first end of the second siding ring of transformer T101.In other words, double carrier transistor Q5 and Q6 and switch module SW1～SW4 are all driven by the voltage on the coil of transformer T101.
Moreover, metal oxide semiconductcor field effect transistor M5 at the secondary side of transformer T101 in Fig. 7 A～Fig. 7 D is identical with the ON time of the switch module of the ON time of M6 or double carrier transistor Q5 and Q6 and the primary side of transformer T101, and its switching frequency is also identical.
Although the present invention discloses as above with preferred embodiment, not in order to limit the present invention.In addition, those skilled in the art will be understood that the present patent application the scope of the claims should be assert to include all embodiment of the present invention and modification thereof largo.
Claims (20)
1. a lighting device, is characterized in that, comprising:
At least one light-emitting diode (LED) module, each light-emitting diode (LED) module comprises plural light emitting diode;
One power factor correction circuit, in order to an AC power is carried out to power factor correcting, and exports the DC voltage after a correction;
One non-modulated type isolated DC converter, in order to according to a load of the DC voltage after described correction and described non-modulated type isolated DC converter, produce the output voltage in a set voltage range, wherein said non-modulated type isolated DC converter is out the direct current transducer of circuit controls and buck; And
The non-isolated direct current transducer of at least one adjustment type, in order to the output voltage of exporting according to described non-modulated type isolated DC converter, produces a fixed current or a fixed voltage, to drive described light-emitting diode (LED) module.
2. lighting device according to claim 1, is characterized in that, described non-modulated type isolated DC converter comprises that one first transformer is in order to DC voltage and described output voltage after proofreading and correct described in electrical isolation.
3. lighting device according to claim 1, is characterized in that, described non-modulated type isolated DC converter comprises at least one transformer and plural switch module, and described switch module is driven by the voltage on the coil of described transformer.
4. lighting device according to claim 1, it is characterized in that, described set voltage range is defined by a higher limit and lower limit, load voltage value when the described load that described higher limit and described lower limit are respectively described non-modulated type isolated DC converter is a full load condition and a Light Condition, and the difference of described higher limit and described lower limit is less than 100.
5. lighting device according to claim 1, it is characterized in that, described non-modulated type isolated DC converter comprises a transformer, plural the first switch module and plural second switch assembly, described the first switch module couples the primary side of described transformer, and described second switch assembly couples the secondary side of described transformer, and described the first switch module is identical with the turn-on cycle of described second switch assembly.
6. lighting device according to claim 1, is characterized in that, described non-modulated type isolated DC converter comprises:
One first transformer, in order to DC voltage and described output voltage after proofreading and correct described in electrical isolation;
One second transformer, couples described the first transformer, and comprises plural coil; And
Plural number switch module, is driven by the described plural coil of described the second transformer.
7. lighting device according to claim 1, is characterized in that, described non-modulated type isolated DC converter comprises:
One first transformer, in order to DC voltage and described output voltage after proofreading and correct described in electrical isolation; And
Plural number switch module, is driven by the coil of described the first transformer.
8. lighting device according to claim 1, is characterized in that, described non-modulated type isolated DC converter is a semibridge system direct current transducer or a full-bridge type direct current transducer.
9. lighting device according to claim 1, is characterized in that, described lighting device is an outdoor display unit.
10. a lighting device, is characterized in that, comprising:
One non-modulated type isolated DC converter, DC voltage after proofreading and correct from one of a power factor correction circuit in order to basis and a load of described non-modulated type isolated DC converter, produce the output voltage in a set voltage range, wherein said non-modulated type isolated DC converter is out the direct current transducer of circuit controls and buck, and comprises that one first transformer is in order to DC voltage and described output voltage after proofreading and correct described in electrical isolation;
Plural number light-emitting diode (LED) module, each light-emitting diode (LED) module comprises plural light emitting diode; And
The non-isolated direct current transducer of plural number adjustment type, in order to the output voltage of exporting according to described non-modulated type isolated DC converter, produces a fixed current or a fixed voltage, to drive described light-emitting diode (LED) module.
11. lighting devices according to claim 10, it is characterized in that, described set voltage range is defined by a higher limit and lower limit, load voltage value when the described load that described higher limit and described lower limit are respectively described non-modulated type isolated DC converter is a full load condition and a Light Condition, and the difference of described higher limit and described lower limit is less than 100.
12. lighting devices according to claim 11, is characterized in that, described non-modulated type isolated DC converter also comprises plural switch module, and described switch module is driven by the voltage on the coil of described the first transformer.
13. lighting devices according to claim 11, is characterized in that, described non-modulated type isolated DC converter also comprises:
One second transformer, couples described the first transformer, and comprises plural coil; And
Plural number switch module, is driven by the described plural coil of described the second transformer.
14. lighting devices according to claim 11, is characterized in that, described non-modulated type isolated DC converter is a semibridge system direct current transducer or a full-bridge type direct current transducer.
15. lighting devices according to claim 11, is characterized in that, described lighting device is an outdoor display unit.
16. 1 kinds of lighting devices, is characterized in that, comprising:
One light-emitting diode (LED) module, described light-emitting diode (LED) module comprises plural light emitting diode;
One power factor correction circuit, in order to an AC power is carried out to power factor correcting, and exports the DC voltage after a correction;
One non-modulated type isolated DC converter, in order to according to a load of the DC voltage after described correction and described non-modulated type isolated DC converter, produce an output voltage, wherein said non-modulated type isolated DC converter, for opening circuit controls, makes described output voltage not be adjusted in a fixed value; And
The non-isolated direct current transducer of one adjustment type, in order to the output voltage of exporting according to described non-modulated type isolated DC converter, produce a fixed current or a fixed voltage, to drive described light-emitting diode (LED) module, wherein said non-modulated type isolated DC converter comprises that one first transformer is in order to DC voltage and described output voltage after proofreading and correct described in electrical isolation, but the non-isolated direct current transducer of described adjustment type does not comprise transformer.
17. lighting devices according to claim 16, is characterized in that, described non-modulated type isolated DC converter also comprises plural switch module, and described switch module is driven by the voltage on the coil of described transformer.
18. lighting devices according to claim 16, is characterized in that, described non-modulated type isolated DC converter also comprises one second transformer, couples described the first transformer; And plural switch module, driven by the plural coil of described the second transformer.
19. lighting devices according to claim 16, is characterized in that, described non-modulated type isolated DC converter is a semibridge system direct current transducer or a full-bridge type direct current transducer.
20. lighting devices according to claim 16, it is characterized in that, described lighting device is an outdoor display unit.
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| CN103582223B (en) * | 2012-08-07 | 2017-06-16 | 欧司朗股份有限公司 | Lighting device |
| CN105790586B (en) | 2014-12-23 | 2019-02-12 | 台达电子工业股份有限公司 | Power supply system, uninterrupted power system and method for supplying power to |
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| CN101483949A (en) * | 2008-01-09 | 2009-07-15 | 中盟光电股份有限公司 | LED lamp and driving apparatus thereof |
| CN101629709A (en) * | 2008-11-11 | 2010-01-20 | 卓敬傑 | Light emitting diode light-emitting device |
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| MX2008007268A (en) * | 2008-06-06 | 2009-12-07 | Servicios Condumex Sa | Electronic luminaire based on light emitting diodes. |
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| CN101629709A (en) * | 2008-11-11 | 2010-01-20 | 卓敬傑 | Light emitting diode light-emitting device |
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