CN102374448A - Illumination device - Google Patents
Illumination device Download PDFInfo
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- CN102374448A CN102374448A CN201010250721XA CN201010250721A CN102374448A CN 102374448 A CN102374448 A CN 102374448A CN 201010250721X A CN201010250721X A CN 201010250721XA CN 201010250721 A CN201010250721 A CN 201010250721A CN 102374448 A CN102374448 A CN 102374448A
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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
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
Owing to have the characteristic of long, light and handy, the low power consumption of durable, life-span and do not contain hazardous substance (for example mercury), therefore use 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 light source of white light illumination device, indicator lamp, automobile-used signal lamp, automobile-used headlight, flash lamp, backlight liquid crystal display module, projector, outdoor display unit (for example street lamp, signboard, outdoor backlight application) ... or the like.
Present light-emitting diode illumination source can't direct control under AC power, so need to use a power system in order to according to AC power, the driven for emitting lights diode illumination source.Yet 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 purpose of this invention is to provide a kind of lighting device, increase, consume more defective in order to overcome existing lighting device cost, the dimension and weight that drives with power system.
The present invention provides a kind of lighting device, comprises at least one light-emitting diode (LED) module, and 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 power factor correcting, and is exported a DC voltage after proofreading and correct; One non-modulated type isolated DC converter in order to according to the DC voltage after proofreading and correct, produces the output voltage in the 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 being exported according to non-modulated type isolated DC converter, produce a fixed current or a fixed voltage, so that the driven for emitting lights diode (led) module.
The present invention provides a kind of lighting device; Comprise a non-modulated type isolated DC converter; In order to according to the DC voltage after proofreading and correct from one of a power factor correction circuit; Produce the output voltage in the 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; The 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 being exported according to non-modulated type isolated DC converter, produce a fixed current or a fixed voltage, so that the driven for emitting lights diode (led) module.
The present invention also provides a kind of lighting device, comprises a light-emitting diode (LED) module, and 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 power factor correcting, and is exported a DC voltage after proofreading and correct; 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 makes output voltage not be adjusted in a fixed value for opening circuit controls; And the non-isolated direct current transducer of an adjustment type; In order to the output voltage of being exported according to non-modulated type isolated DC converter; Produce a fixed current or a fixed voltage; So that 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; Come the DC voltage after processing power factor correction circuit is proofreaied and correct owing to only need open the non-modulated type isolated DC converter of circuit controls and auto-excitation type control design, the adjustment type isolated DC converter of control can promote on efficient than the loop circuit.Simultaneously, owing to not feedbacking control, simpler on circuit design, the volume of power-supply system also can reduce and cost also can reduce.
Description of drawings
The present invention can follow appended graphic and by being understood with embodiment, appended graphic also be the part of embodiment.Those skilled in the art can understand claim of the present invention and should be assert largo to include embodiments of the invention and modification thereof, 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 adjustment type isolated 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 first embodiment of non-modulated type isolated DC converter of the present invention;
Fig. 6 B is the structural representation of 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 the 9th embodiment of the present invention;
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 the 11 embodiment of the present invention;
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 the 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 the 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 the 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 the non-modulated type isolated DC converter of the present invention.
The 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: two-carrier transistor;
VOUT: output voltage; VIN: input voltage;
20: adjustment type isolated 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.
The specific embodiment
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, one adjustment type isolated DC converter (regulated isolation DC to DC converter) the non-isolated direct current transducer of 20, one adjustment type (regulated non-isolation DC to DC converter) 30 and one light-emitting diode (LED) module 40.In certain embodiments, the non-isolated direct current transducer 30 of adjustment type can be all a plurality of 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 backlight application ... or the like, but be not limited to this.Lighting device 100 can be indicator lamp, automobile-used signal lamp, automobile-used headlight, flash lamp, backlight liquid crystal display module, projector light source ... or the like.
The non-isolated direct current transducer 30 of power factor correction circuit 10, adjustment type isolated DC converter 20 and adjustment type constitutes a power system of lighting devices 100.Power factor correction circuit 10 carries out power factor correcting in order to receive an AC power so that meet the requirement of IEC6100-3-2 Class C to the Harmonics of Input distortion, for example total current harmonic distortion less than 33% and power factor greater than 0.9.For example, the AC power that power factor correction circuit 10 is received 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 improved controller and constituted by the power factor of arranging in pairs or groups of one in boost converter (boost converter), step-down controller (buck converter) and the type of voltage step-up (bust-boost converter).
DC voltage after adjustment type isolated DC converter 20 is proofreaied and correct in order to received power factor correction circuit 10, generation one are isolated, output voltage stable and direct current is given the non-isolated direct current transducer 30 of adjustment type.For example, adjustment type isolated DC converter 20 is fixed as the DC voltage of 12V or 24V in order to generation.In other words, adjustment type isolated DC converter 20 is a step-down type dc converter.Adjustment type isolated DC converter 20 can be made up of the pulse width modulation controller (PWM controller) of arranging in pairs or groups of one in flyback isolating converter (flyback isolated converter) and the forward type isolating converter (forward isolated converter), so that reach the requirement of regulated output voltage.Be noted that 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; In order to receive the DC voltage that adjustment type isolated DC converter 20 is exported; Produce a fixed current or fixed voltage to a 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 decided electric current (DC current) in order to what produce 350mA or 700mA.The non-isolated direct current transducer 30 of adjustment type is constituted by the pulse width modulation controller of arranging in pairs or groups of one in boost converter (boost converter), step-down controller (buck converter) and the type of voltage step-up (bust-boost converter), stablizes the requirement that output current is controlled so that reach.
Each of light-emitting diode (LED) module 40 can be by the series connection of many light emitting diodes or the module that is formed in parallel, and in order to the demand of brightness, and light-emitting diode (LED) module 40 decides under the 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 during some is used (for example outdoor signboard or outdoor back lighting), lighting device 100 also can comprise the non-isolated direct current transducer of a plurality of adjustment types (LED drive) 30 and a plurality of light-emitting diode (LED) modules 40.Each light-emitting diode (LED) module 40 works alone, and does not receive the influence of other light-emitting diode (LED) module 40.In some instance, 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 adjustment type isolated DC converter of the present invention.Adjustment type isolated 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 efficient of power system (being power factor correction circuit 10, adjustment type isolated DC converter 20 and the non-isolated direct current transducer 30 of adjustment type), Fig. 5 is the structured flowchart of another embodiment of 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 with power factor correction circuit 10 shown in Fig. 1 and light-emitting diode (LED) module 40, so in this no longer tired stating.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 adjustment type isolated DC converter 20 differences shown in Fig. 1 " give the non-isolated direct current transducer 30 of adjustment type in order to unfixed (floating) output voltage that produces in the set voltage range.In certain embodiments; Set voltage range is defined by a higher limit and lower limit; Higher limit and lower limit are represented non-modulated type isolated DC direct current conversion 20 respectively " load voltage value when device operates 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 produced can be any one among 5V, 10V, 50V or the 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 with 20 outputs of adjustment type isolated DC converter is different.The non-isolated direct current transducer of adjustment type 30 is as LED drive; In order to receive non-modulated type isolated DC converter 20 " revocable DC voltage of being exported, 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 " work period of can be a step-down controller and having symmetry, 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 the 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, among this embodiment, do not need by a pulse width modulation controller, feedback control and output voltage is maintained a fixed voltage switch module according to output voltage.In 180 watts application, open circuit controls and auto-excitation type and control the non-modulated type isolated DC converter 20 that the semibridge system isolating converter of design is realized " control flyback isolating converter can promote 5% on efficient than the loop circuit.Simultaneously,, make circuit design simpler owing to do not need pulse width modulation controller to feedback control, the volume of power-supply system also can reduce 30% and cost also can reduce.
Fig. 6 A is the structural representation of first embodiment of non-modulated type isolated DC converter of the present invention.Shown in Fig. 6 A, 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 non-modulated type isolated DC converter 20A voltage exported 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 one be lower than 60V a revocable output voltage VO UT.For example, when AC power is 220～240VAC, power factor correction circuit 10 " voltage exported is the DC voltage of 400V.If AC power is when being 120～277VAC, power factor correction circuit 10 " voltage exported is the DC voltage of 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 when underloading, output voltage VO UT then 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 constitute a rectification circuit, and diode D103 and D104, resistance R 101 and capacitor C 104 constitute a start-up circuit.Switch module SW1 and SW2 can be two-way admittance assembly (for example MOSFET), also can be the combination of unidirectional feed-through assembly (IGBT or BJT) and diode.For example, diode D101 and D102 are commutation diode, and diode D104 is that a pair of is to conducting thyristor (DIAC).Capacitor C 1 is a 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 the anode that one first end is coupled to input voltage VIN, and one second end is coupled to capacitor C 102.Capacitor C 102 has second end that one first end is coupled to 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 second end that one first end is coupled to capacitor C 102, and one second end is coupled to transformer T102.The second siding ring of transformer T101 has the negative electrode that one first end is coupled to diode D101, and one second end is coupled to the negative electrode of diode D102.Capacitor C 103 has the anode that one first end is coupled to 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 are constituted becomes DC voltage to be stored in the capacitor C 103 in order to the ac voltage rectifier that is produced on the second siding ring with transformer T101.
Switch module SW1 has first end that one first end is coupled to capacitor C 101, and one second end is coupled to switch module SW2.Switch module SW2 has second end that one first end is coupled to switch module SW1, and one second end is coupled to earthing potential.Transformer T102 is coupled between transformer T101 and the 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 first coil are coupled to the control end and second end of switch module SW1 respectively, and the two ends of second coil are coupled to the control end and second end of switch module SW2 respectively.In this embodiment, switch module SW1 has identical ON time (meaning is a symmetric periodic) with SW2.For example, the switching frequency of switch module SW1 and SW2 is between 20KHz to 33KHz or more than the 40KHz, avoiding 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 then on the low side, and when underloading, switching frequency is then higher.
Resistance R 101 has first end that one first end is coupled to 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 second end of switch module SW1.Diode D104 has one first end and is coupled to second end of resistance R 101 and the control end that one second end is coupled to switch module SW2, is coupled to earthing potential and capacitor C 104 has first end and one second end that one first end is coupled to diode D104.
Input voltage VIN can be through 104 chargings of 101 pairs of capacitor C of resistance R; When the stored voltage of capacitor C 104 during greater than a set voltage (for example 32V); Diode D104 is breakdown; Make capacitor C 104 produce discharge current by diode D104, and with switch module SW2 conducting, so that reach the purpose of startup.Through switch module SW1 and the conducting of SW2 alternately, input voltage VIN can convert the 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 on the capacitor C 104 can discharge through switch module SW2, so diode D104 can not cause restarting.
Because switch module SW1 and SW2 are controlled by the voltage on first, second coil of transformer T102 among the non-modulated type isolated DC converter 20A, so be an auto-excitation type and the semibridge system direct current transducer of opening circuit controls.By on can know that power system of the present invention can be supplied power and organized light-emitting diode (LED) module at the most, and need not use a controller (for example pulse width modulation controller) to carry out the control of loop circuit, output voltage VO UT is controlled at 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, the control flyback isolating converter than the loop circuit, non-modulated type isolated DC converter 20A can make power system on efficient, promote 5%.
Fig. 6 B is the structural representation of second embodiment of non-modulated type isolated DC converter of the present invention.Shown in Fig. 6 B; Non-modulated type isolated DC converter 20B is similar with person shown in Fig. 6 A; Its difference is switch module SW1 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 first end of anode and metal oxide semiconductcor field effect transistor M2 of input voltage VIN, and metal oxide semiconductcor field effect transistor M2 is coupled to and the negative terminal of second end of metal oxide semiconductcor field effect transistor M1 and input voltage VIN between.The two ends of first coil of transformer T102 are coupled to the control end and second end of metal oxide semiconductcor field effect transistor M1 respectively, and the two ends of second coil of transformer T102 are coupled to the control end and second end of metal oxide semiconductcor field effect transistor M2 respectively.Zener diode ZD1 and ZD2 anti-phase ground coupled in series are between the control end and second end of metal oxide semiconductcor field effect transistor M1, and Zener diode ZD3 and ZD4 anti-phase ground coupled in series are between the control end and second end of metal oxide semiconductcor field effect transistor M2.The action of non-modulated type isolated DC converter 20B is similar with person shown in Fig. 6 A, so in this no longer tired stating.
Fig. 6 C is the structural representation of the 3rd embodiment of non-modulated type isolated DC converter of the present invention.Shown in Fig. 6 C; Non-modulated type isolated DC converter 20C is similar with person shown in Fig. 6 A; Its difference is that switch module SW1 replaces with two-carrier transistor Q1 and diode D105, and switch module SW2 replaces with two-carrier transistor Q2 and diode D106.Two-carrier transistor Q1 is coupled between the colelctor electrode of anode and two-carrier transistor Q2 of input voltage VIN, and two-carrier transistor Q2 is coupled to and the negative terminal of the emitter stage of two-carrier transistor Q1 and input voltage VIN between.The two ends of first coil of transformer T102 are coupled to base stage and the emitter stage of two-carrier transistor Q1 respectively, and the two ends of second coil of transformer T102 are coupled to base stage and the emitter stage of two-carrier transistor Q2 respectively.The negative electrode of diode D105 and anode are respectively coupled to colelctor electrode and the emitter stage of two-carrier transistor Q1, and the negative electrode of diode D106 and anode are respectively coupled to colelctor electrode and the emitter stage of two-carrier transistor Q2.The action of non-modulated type isolated DC converter 20C is similar with person shown in Fig. 6 A, so in this no longer tired stating.
Fig. 6 D is the structural representation of the 4th embodiment of non-modulated type isolated DC converter of the present invention.Shown in Fig. 6 D, non-modulated type isolated DC converter 20D is similar with 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.Shown in Fig. 6 E, non-modulated type isolated DC converter 20E is similar with 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.Shown in Fig. 6 F, non-modulated type isolated DC converter 20F is similar with person shown in Fig. 6 C, and its difference is that two-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.Shown in Fig. 6 G; Non-modulated type isolated DC converter 20G is similar with person shown in Fig. 6 A; Its difference is that capacitor C 101 and C102 are replaced by switch module SW3 and SW4 respectively, make that non-modulated type isolated DC converter 20G is an auto-excitation type and the full-bridge type direct current transducer of opening circuit controls.At this moment, 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 first coil are coupled to the control end and second end of switch module SW1 respectively; The two ends of second coil are coupled to the control end and second end of switch module SW2 respectively; The two ends of tertiary coil are coupled to the control end and second end of switch module SW3 respectively, and the two ends of second coil are coupled to the control end and second end of switch module SW4 respectively.
Input voltage VIN can be through 104 chargings of 101 pairs of capacitor C of resistance R; When the stored voltage of capacitor C 104 during greater than a set voltage (for example 32V); Diode D104 is breakdown; Make capacitor C 104 produce discharge current, and switch module SW2 and SW3 conducting are reached the purpose of startup by diode D104.Through transformer T102 alternately actuating switch assembly SW1 and SW4 and SW2 and SW3, input voltage VIN can convert the 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 on the capacitor C 104 can discharge through switch module SW2, so diode D104 can not cause restarting.In this embodiment; All drive at switch module SW1～SW4 by the voltage on the coil of transformer T102; So need not use a controller (for example pulse width modulation controller) to come switch module SW1～SW4 to be carried out the control of loop circuit according to output voltage VO UT.
Fig. 6 H is the structural representation of the 8th embodiment of non-modulated type isolated DC converter of the present invention.Shown in Fig. 6 H; Non-modulated type isolated DC converter 20H is similar with 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 first end of anode and metal oxide semiconductcor field effect transistor M2 of input voltage VIN, and metal oxide semiconductcor field effect transistor M2 is coupled to and the negative terminal of second end of metal oxide semiconductcor field effect transistor M1 and input voltage VIN between.Metal oxide semiconductcor field effect transistor M3 is coupled between first end of anode and metal oxide semiconductcor field effect transistor M4 of input voltage VIN, and metal oxide semiconductcor field effect transistor M4 is coupled to and the negative terminal of second end of metal oxide semiconductcor field effect transistor M3 and input voltage VIN between.The two ends of first coil of transformer T102 are coupled to the control end and second end of metal oxide semiconductcor field effect transistor M1 respectively, and the two ends of second coil of transformer T102 are coupled to the control end and second end of metal oxide semiconductcor field effect transistor M2 respectively.The two ends of the tertiary coil of transformer T102 are coupled to the control end and second end of metal oxide semiconductcor field effect transistor M3 respectively, and the two ends of the 4th coil of transformer T102 are coupled to the control end and second end of metal oxide semiconductcor field effect transistor M4 respectively.Zener diode ZD1 and ZD2 anti-phase ground coupled in series are between the control end and second end of metal oxide semiconductcor field effect transistor M1, and Zener diode ZD3 and ZD4 anti-phase ground coupled in series are between the control end and second end of metal oxide semiconductcor field effect transistor M2.Zener diode ZD5 and ZD6 anti-phase ground coupled in series are between the control end and second end of metal oxide semiconductcor field effect transistor M3, and Zener diode ZD7 and ZD8 anti-phase ground coupled in series are between the control end and second end of metal oxide semiconductcor field effect transistor M4.The action of non-modulated type isolated DC converter 20B is similar with person shown in Fig. 6 G, so in this no longer tired stating.
Fig. 6 I is the structural representation of the 9th embodiment of non-modulated type isolated DC converter of the present invention.Shown in Fig. 6 I; Non-modulated type isolated DC converter 20I is similar with person shown in Fig. 6 G; Its difference is that switch module SW1 replaces with two-carrier transistor Q1 and diode D105; Switch module SW2 replaces with two-carrier transistor Q2 and diode D106, and switch module SW2 replaces with two-carrier transistor Q3 and diode D107, and switch module SW4 replaces with two-carrier transistor Q4 and diode D108.Two-carrier transistor Q1 is coupled between the colelctor electrode of anode and two-carrier transistor Q2 of input voltage VIN, and two-carrier transistor Q2 is coupled to and the negative terminal of the emitter stage of two-carrier transistor Q1 and input voltage VIN between.Two-carrier transistor Q3 is coupled between the colelctor electrode of anode and two-carrier transistor Q4 of input voltage VIN, and two-carrier transistor Q4 is coupled to and the negative terminal of the emitter stage of two-carrier transistor Q3 and input voltage VIN between.The two ends of first coil of transformer T102 are coupled to base stage and the emitter stage of two-carrier transistor Q1 respectively, and the two ends of second coil of transformer T102 are coupled to base stage and the emitter stage of two-carrier transistor Q2 respectively.The two ends of the tertiary coil of transformer T102 are coupled to base stage and the emitter stage of two-carrier transistor Q3 respectively, and the two ends of the 4th coil of transformer T102 are coupled to base stage and the emitter stage of two-carrier transistor Q4 respectively.The negative electrode of diode D105 and anode are respectively coupled to colelctor electrode and the emitter stage of two-carrier transistor Q1, and the negative electrode of diode D106 and anode are respectively coupled to colelctor electrode and the emitter stage of two-carrier transistor Q2.The negative electrode of diode D107 and anode are respectively coupled to colelctor electrode and the emitter stage of two-carrier transistor Q3, and the negative electrode of diode D108 and anode are respectively coupled to colelctor electrode and the emitter stage of two-carrier transistor Q4.The action of non-modulated type isolated DC converter 20I is similar with person shown in Fig. 6 G, so in this no longer tired stating.
Fig. 6 J is the structural representation of the tenth embodiment of non-modulated type isolated DC converter of the present invention.Shown in Fig. 6 J, non-modulated type isolated DC converter 20J is similar with 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.Shown in Fig. 6 K, non-modulated type isolated DC converter 20K is similar with 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.Shown in Fig. 6 L, non-modulated type isolated DC converter 20L is similar with person shown in Fig. 6 I, and its difference is that two-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 the non-modulated type isolated DC converter of the present invention.Shown in Fig. 7 A; This rectification circuit is similar with person shown in Fig. 6 A; Its difference is also to comprise metal oxide semiconductcor field effect transistor M5 and M6, and wherein metal oxide semiconductcor field effect transistor M5 has the negative electrode that one first end is coupled to diode D101, and one second end couples the anode as for diode D101; And one control end couple second end of the second siding ring of transformer T101; And metal oxide semiconductcor field effect transistor M6 has the negative electrode that one first end is coupled to diode D102, and one second end couples the anode as for diode D102, and a control end couples first end of the second siding ring of transformer T101.In other words, in the 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 the non-modulated type isolated DC converter of the present invention.Shown in Fig. 7 B; This rectification circuit is similar with person shown in Fig. 7 A; Its difference is that metal oxide semiconductcor field effect transistor M5 replaces with two-carrier transistor Q5; And metal oxide semiconductcor field effect transistor M6 replaces with two-carrier transistor Q6, and wherein two-carrier transistor Q5 has the negative electrode that a colelctor electrode is coupled to diode D101, and an emitter stage couples the anode as for diode D101; And one base stage couple second end of the second siding ring of transformer T101; And two-carrier transistor Q6 has the negative electrode that a colelctor electrode is coupled to diode D102, and an emitter stage couples the anode as for diode D102, and a base stage couples first end of the inferior lateral coil of transformer T101.In other words, in the non-modulated type isolated DC converter, two-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 the non-modulated type isolated DC converter of the present invention.Shown in Fig. 7 C, this rectification circuit is similar with 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 the centre cap that a main coil is coupled to the secondary side of transformer T101, and one first coil is in order to driving 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 first coil couple the control end and second end of metal oxide semiconductcor field effect transistor M5 respectively, and the two ends of one second coil are coupled to the control end and second end of metal oxide semiconductcor field effect transistor M6 respectively.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 the non-modulated type isolated DC converter of the present invention.Shown in Fig. 7 D; This rectification circuit bag is similar with person shown in Fig. 7 C; Its difference is that metal oxide semiconductcor field effect transistor M5 replaces with two-carrier transistor Q5; And metal oxide semiconductcor field effect transistor M6 replaces with two-carrier transistor Q6, and wherein two-carrier transistor Q5 has the negative electrode that a colelctor electrode is coupled to diode D101, and an emitter stage couples the anode as for diode D101; And one base stage couple second end of the second siding ring of transformer T101; And two-carrier transistor Q6 has the negative electrode that a colelctor electrode is coupled to diode D102, and an emitter stage couples the anode as for diode D102, and a base stage couples first end of the second siding ring of transformer T101.In other words, two-carrier transistor Q5 and Q6 and switch module SW1～SW4 are all driven by the voltage on the coil of transformer T101.
Moreover; ON time at the switch module of the primary side of the ON time of the metal oxide semiconductcor field effect transistor M5 of the secondary side of transformer T101 and M6 or two-carrier transistor Q5 and Q6 and transformer T101 among Fig. 7 A～Fig. 7 D is identical, and its switching frequency is also identical.
Though the present invention discloses as above with preferred embodiment, be not in order to restriction the present invention.In addition, those skilled in the art will be understood that claim of the present invention 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 power factor correcting, and is exported a DC voltage after proofreading and correct;
One non-modulated type isolated DC converter in order to according to the DC voltage after the above-mentioned correction, produces the output voltage in the set voltage range, and 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, the output voltage in order to be exported according to said non-modulated type isolated DC converter produces a fixed current or a fixed voltage, so that drive said light-emitting diode (LED) module.
2. lighting device according to claim 1 is characterized in that, said non-modulated type isolated DC converter comprises DC voltage and the said output voltage after one first transformer is in order to the said correction of electrical isolation.
3. lighting device according to claim 1 is characterized in that, said non-modulated type isolated DC converter comprises at least one transformer and plural switch module, and said switch module is driven by the voltage on the coil of said transformer.
4. lighting device according to claim 1; It is characterized in that; Said set voltage range is defined by a higher limit and lower limit; Said higher limit and said lower limit are respectively the load voltage value of said non-modulated type isolated DC converter when operating in a full load condition and a Light Condition, and the difference of said higher limit and said lower limit is less than 100.
5. lighting device according to claim 1; It is characterized in that; Said non-modulated type isolated DC converter comprises a transformer, plural first switch module and plural second switch assembly; Said first switch module couples the primary side of said transformer, and said second switch assembly couples the secondary side of said transformer, and the turn-on cycle of said first switch module and said second switch assembly is identical.
6. lighting device according to claim 1 is characterized in that, said non-modulated type isolated DC converter comprises:
One first transformer is in order to DC voltage after the said correction of electrical isolation and said output voltage;
One second transformer couples said first transformer, and comprises plural coil; And
The plural number switch module is driven by the said plural coil of said second transformer.
7. lighting device according to claim 1 is characterized in that, said non-modulated type isolated DC converter comprises:
One first transformer is in order to DC voltage after the said correction of electrical isolation and said output voltage; And
The plural number switch module is driven by the coil of said first transformer.
8. lighting device according to claim 1 is characterized in that, said 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, said lighting device is an outdoor display unit.
10. a lighting device is characterized in that, comprising:
One non-modulated type isolated DC converter; In order to according to the DC voltage after proofreading and correct from one of a power factor correction circuit; Produce the output voltage in the set voltage range; Wherein said non-modulated type isolated DC converter is out the direct current transducer of circuit controls and buck, and comprises DC voltage and said output voltage after one first transformer is in order to the said correction of electrical isolation;
The 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, the output voltage in order to be exported according to said non-modulated type isolated DC converter produces a fixed current or a fixed voltage, so that drive said light-emitting diode (LED) module.
11. lighting device according to claim 10; It is characterized in that; Said set voltage range is defined by a higher limit and lower limit; Said higher limit and said lower limit are respectively the load voltage value of said non-modulated type isolated DC converter when operating in a full load condition and a Light Condition, and the difference of said higher limit and said lower limit is less than 100.
12. lighting device according to claim 11 is characterized in that, said non-modulated type isolated DC converter also comprises plural switch module, and said switch module is driven by the voltage on the coil of said first transformer.
13. lighting device according to claim 11 is characterized in that, said non-modulated type isolated DC converter also comprises:
One second transformer couples said first transformer, and comprises plural coil; And
The plural number switch module is driven by the said plural coil of said second transformer.
14. lighting device according to claim 11 is characterized in that, said non-modulated type isolated DC converter is a semibridge system direct current transducer or a full-bridge type direct current transducer.
15. lighting device according to claim 11 is characterized in that, said lighting device is an outdoor display unit.
16. a lighting device is characterized in that, comprising:
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 power factor correcting, and is exported a DC voltage after proofreading and correct;
One non-modulated type isolated DC converter in order to according to the DC voltage after the said correction, produces an output voltage, and wherein said non-modulated type isolated DC converter makes said output voltage not be adjusted in a fixed value for opening circuit controls; And
The non-isolated direct current transducer of one adjustment type; In order to the output voltage of being exported according to said non-modulated type isolated DC converter; Produce a fixed current or a fixed voltage; So that drive said light-emitting diode (LED) module, wherein said non-modulated type isolated DC converter comprises DC voltage and the said output voltage after one first transformer is in order to the said correction of electrical isolation, but the non-isolated direct current transducer of said adjustment type does not comprise transformer.
17. lighting device according to claim 16 is characterized in that, said non-modulated type isolated DC converter also comprises plural switch module, and said switch module is driven by the voltage on the coil of said transformer.
18. lighting device according to claim 16 is characterized in that, said non-modulated type isolated DC converter also comprises one second transformer, couples said first transformer; And plural switch module, drive by the plural coil of said second transformer.
19. lighting device according to claim 16 is characterized in that, said non-modulated type isolated DC converter is a semibridge system direct current transducer or a full-bridge type direct current transducer.
20. lighting device according to claim 16, it is characterized in that said lighting device is an outdoor display unit.
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| CN201010250721.XA CN102374448B (en) | 2010-08-05 | 2010-08-05 | Illumination device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103582223A (en) * | 2012-08-07 | 2014-02-12 | 欧司朗股份有限公司 | Illuminating device |
| US10056780B2 (en) | 2014-12-23 | 2018-08-21 | Delta Electronics, Inc. | Power supply system, uninterruptible power supply system, and power supply method |
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| US20070206375A1 (en) * | 2000-04-24 | 2007-09-06 | Color Kinetics Incorporated | Light emitting diode based products |
| US20080037239A1 (en) * | 2006-06-30 | 2008-02-14 | James Thomas | Elongated led lighting fixture |
| CN101483949A (en) * | 2008-01-09 | 2009-07-15 | 中盟光电股份有限公司 | LED lamp and driving apparatus thereof |
| US20090303711A1 (en) * | 2008-06-06 | 2009-12-10 | Servicios Condumex S.A. De C.V. | Electronic luminaire based on light emitting diodes |
| CN101629709A (en) * | 2008-11-11 | 2010-01-20 | 卓敬傑 | Light emitting diode light-emitting device |
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| US20070206375A1 (en) * | 2000-04-24 | 2007-09-06 | Color Kinetics Incorporated | Light emitting diode based products |
| US20080037239A1 (en) * | 2006-06-30 | 2008-02-14 | James Thomas | Elongated led lighting fixture |
| CN101483949A (en) * | 2008-01-09 | 2009-07-15 | 中盟光电股份有限公司 | LED lamp and driving apparatus thereof |
| US20090303711A1 (en) * | 2008-06-06 | 2009-12-10 | Servicios Condumex S.A. De C.V. | Electronic luminaire based on light emitting diodes |
| CN101629709A (en) * | 2008-11-11 | 2010-01-20 | 卓敬傑 | Light emitting diode light-emitting device |
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| CN103582223A (en) * | 2012-08-07 | 2014-02-12 | 欧司朗股份有限公司 | Illuminating device |
| US10056780B2 (en) | 2014-12-23 | 2018-08-21 | Delta Electronics, Inc. | Power supply system, uninterruptible power supply system, and power supply method |
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| CN102374448B (en) | 2014-06-18 |
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