CN103619093A - A LED integrated light source - Google Patents

A LED integrated light source Download PDF

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Publication number
CN103619093A
CN103619093A CN201310521999.XA CN201310521999A CN103619093A CN 103619093 A CN103619093 A CN 103619093A CN 201310521999 A CN201310521999 A CN 201310521999A CN 103619093 A CN103619093 A CN 103619093A
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Prior art keywords
module
light source
pwm control
current
pfc controller
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CN201310521999.XA
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Chinese (zh)
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汤志新
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Individual
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Individual
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Priority to CN201310521999.XA priority Critical patent/CN103619093A/en
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Abstract

The invention discloses a LED integrated light source comprising a LED light source module and a driving circuit. The driving circuit comprises an EMI filtering and rectifying circuit, a PFC controller, a driving module, and a PWM control module. The EMI filtering and rectifying circuit filters and rectifies alternating current of inputted AC commercial power and converts the alternating current into direct current. The PFC controller electrically connected with the EMI filtering and rectifying circuit is used for correcting a power factor and outputs constant direct current at an output end. Connected with the PFC controller, the driving module adjusts current flowing through the LED light source connected with the driving module according to a current PWM control signal. The PWM control module generates a current PWM control signal and is electrically connected with the PFC controller and the driving module. With the PFC controller, the LED integrated light source reduces circuit loss, increases electric energy utilization rate, and decreases power consumption in a load condition in a process that the circuit generates steady current. In addition, the LED integrated light source achieves miniaturization of the driving circuit and has advantages of convenient and fast use, high reliability, and low cost.

Description

A kind of LED integrated optical source
Technical field
The present invention relates to LED general illumination light sources technical field, especially relate to a kind of LED integrated optical source.
Background technology
LED is current mode semiconductor device, by certain electric current, will work also luminous, want LED working stability and just must provide constant electric current, in LED encapsulation technology, common practice is to be encapsulated on a heat-radiating substrate after one or plurality of LEDs chip matrix are arranged, more supporting external constant-current driving power supply is to guarantee LED useful life, when adopting mains-supplied, must be rectified into DC power supply, yet according to the number of LED, best bet is to adopt switching regulator stabilized current power supply.And voltage ripple factor after rectification is larger, so will add in actual use electrochemical capacitor, carry out filtering, but after adding electrochemical capacitor, ripple factor has improved, but power factor has reduced.
And the electrolytic capacitor volume that prior art is utilized is large, the size of the drive circuit of driving LED lighting apparatus is being carried out having difficulties in miniaturization, and the life-span of the parts such as capacitor is short, can cause the problem in the life-span that shortens integral LED drive circuit.
In addition, the transformer that prior art is utilized is compared with other element, and volume is quite large and have problems in efficiency, in the miniaturization of drive circuit, has difficulties.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, the integrated type LED light source of the loss of a kind of power stability, reduction circuit and the utilance of enhancing electric energy is provided.
The object of the invention is to be achieved through the following technical solutions:
A kind of integrated LED light source, comprise LED light source module and drive circuit, described drive circuit comprises that the alternating current of the electric main to inputting carries out filter rectification, and alternating current is changed into galvanic EMI filter rectifier, when being electrically connected to for correcting power factors with EMI filter rectifier, at output, export the pfc controller of Constant Direct Current electric current, be connected with described pfc controller, according to electric current pwm control signal, adjust the driver module of the electric current passing through in the LED light source module being connected with self, and PWM control module, it produces described electric current pwm control signal, described PWM control module is electrically connected to pfc controller, driver module.By pfc controller, at circuit, produce in the process of stabling current, reduced the loss of circuit, strengthened the utilance of electric energy, reduced the power consumption under loading condition; Simultaneously, the present invention can be in the standardization LED light source module of direct current work to reach connection electric main by EMI filter rectifier, pfc controller and PWM control module, removed external driving power source system from, thereby realize the miniaturization of drive circuit, easy to use, reliability is high, and cost is low.
Preferably, also have a common mode filtering inductance between driver module and LED light source module, the positive and negative electrode of driver module connects respectively the input of common mode filtering inductance, and two outputs of common mode filtering inductance are LED light source module for power supply.
Concrete, described EMI filter rectifier comprises for receiving the rectification module of input AC electricity and for receiving the rear class module of the direct voltage after rectification, described rectification module comprises the first rectifier bridge and the second rectifier bridge, between the forward ac input end of the first rectifier bridge and civil power, be connected with inductance, negative sense DC output end is connected with the negative sense DC output end of the second rectifier bridge by the first diode, and described the first rectifier bridge is connected with the input of rear class module with the forward dc output of the second rectifier bridge.Without using extra electrolytic capacitor, be about to AC rectification and become DC power supply, avoided because of the chronic leakage of the electrolyte in electrochemical capacitor, causing the problem of the LED lamp lost of life in prior art, greatly extended LED light fixture working life.
Optionally, between described electric main and EMI filter rectifier, also there is a lightning protection circuit.
The present invention has the following advantages and beneficial effect compared to existing technology:
The present invention, by pfc controller, produces in the process of stabling current at circuit, has reduced the loss of circuit, has strengthened the utilance of electric energy, has reduced the power consumption under loading condition; Simultaneously, the present invention can be in the standardization LED light source module of direct current work to reach connection electric main by EMI filter rectifier, pfc controller and PWM control module, removed external driving power source system from, thereby realize the miniaturization of drive circuit, easy to use, reliability is high, and cost is low.
Accompanying drawing explanation
Fig. 1 is the theory diagram of integrated LED light source of the present invention;
Fig. 2 is the circuit theory diagrams of EMI filter rectifier.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the present embodiment provides a kind of LED integrated optical source, comprise LED light source module 4 and drive circuit, described drive circuit comprises that the alternating current of the electric main to inputting carries out filter rectification, and alternating current is changed into galvanic EMI filter rectifier 1, when being electrically connected to for correcting power factors with EMI filter rectifier, at output, export the pfc controller 2 of Constant Direct Current electric current, be connected with described pfc controller 2, according to electric current pwm control signal, adjust the driver module 3 of the electric current passing through in the LED light source module being connected with self, and PWM control module 5, it produces described electric current pwm control signal, described PWM control module 5 is electrically connected to pfc controller 2, driver module 3.The electric current that PWM control module produces and the current comparator of pfc controller inside compare, and adjust the variation of output current, by driver module, the brightness of LED light source module are changed.
Between driver module and LED light source module, also have a common mode filtering inductance, the positive and negative electrode of driver module output connects respectively the input of common mode filtering inductance, and two outputs of common mode filtering inductance are LED light source module for power supply.By common mode filtering inductance, use in LED drive circuit to reduce its electromagnetic interference.
Concrete, described EMI filter rectifier comprises for receiving the rectification module 6 of input AC electricity and for receiving the rear class module 7 of the direct voltage after rectification, described rectification module 7 comprises the first rectifier bridge and the second rectifier bridge, between the forward ac input end of the first rectifier bridge and civil power, be connected with inductance, negative sense DC output end is connected with the negative sense DC output end of the second rectifier bridge by the first diode, and described the first rectifier bridge is connected with the input of rear class module with the forward dc output of the second rectifier bridge.Without using extra electrolytic capacitor, be about to AC rectification and become DC power supply, avoided because of the chronic leakage of the electrolyte in electrochemical capacitor, causing the problem of the LED lamp lost of life in prior art, greatly extended LED light fixture working life.
Optionally, between described electric main and EMI filter rectifier, also there is a lightning protection circuit.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.

Claims (4)

1. a LED integrated optical source, comprise LED light source module and drive circuit, it is characterized in that, described drive circuit comprises that the alternating current of the electric main to inputting carries out filter rectification, and alternating current is changed into galvanic EMI filter rectifier, when being electrically connected to for correcting power factors with EMI filter rectifier, at output, export the pfc controller of Constant Direct Current electric current, be connected with described pfc controller, according to electric current pwm control signal, adjust the driver module of the electric current passing through in the LED light source module being connected with self, and PWM control module, it produces described electric current pwm control signal, described PWM control module is electrically connected to pfc controller, driver module.
2. LED integrated optical source according to claim 1, it is characterized in that, between driver module and LED light source module, also there is a common mode filtering inductance, the positive and negative electrode of driver module connects respectively the input of common mode filtering inductance, and two outputs of common mode filtering inductance are LED light source module for power supply.
3. LED integrated optical source according to claim 2, it is characterized in that, described EMI filter rectifier comprises for receiving the rectification module of input AC electricity and for receiving the rear class module of the direct voltage after rectification, described rectification module comprises the first rectifier bridge and the second rectifier bridge, between the forward ac input end of the first rectifier bridge and civil power, be connected with inductance, negative sense DC output end is connected with the negative sense DC output end of the second rectifier bridge by the first diode, described the first rectifier bridge is connected with the input of rear class module with the forward dc output of the second rectifier bridge.
4. according to LED integrated optical source described in claim 1-3 any one, it is characterized in that between described electric main and EMI filter rectifier, also thering is a lightning protection circuit.
CN201310521999.XA 2013-10-29 2013-10-29 A LED integrated light source Pending CN103619093A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107454716A (en) * 2017-08-09 2017-12-08 山东旭程照明科技有限公司 A kind of light-operated driving control system of double induction LEDs
CN107517516A (en) * 2017-08-15 2017-12-26 山东旭程照明科技有限公司 A kind of double bright control systems of radar induction LED driving

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202396059U (en) * 2012-01-06 2012-08-22 昆山市华英精密模具工业有限公司 Led driving power supply
CN202435663U (en) * 2011-12-20 2012-09-12 成都成电硅海科技股份有限公司 Non-isolated LED constant-current driving power source with high power factor
CN202857051U (en) * 2012-09-04 2013-04-03 江苏尚明光电有限公司 Novel LED lamp drive device
CN203086808U (en) * 2013-01-17 2013-07-24 厦门理工学院 Mixed color LED adjustable color temperature constant illumination intelligent LED plane lighting device
CN203104850U (en) * 2013-03-18 2013-07-31 张新安 Light emitting diode (LED) lamp drive power supply adopting pulse width modulation (PWM) dimming
CN103228083A (en) * 2013-04-25 2013-07-31 陕西科技大学 Intelligent dimming LED driving power supply
CN103277759A (en) * 2013-05-13 2013-09-04 东莞市中实创半导体照明有限公司 Mains supply power-supplying LED integrated light source
CN203243575U (en) * 2013-05-16 2013-10-16 电子科技大学中山学院 High-power LED lighting driver

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202435663U (en) * 2011-12-20 2012-09-12 成都成电硅海科技股份有限公司 Non-isolated LED constant-current driving power source with high power factor
CN202396059U (en) * 2012-01-06 2012-08-22 昆山市华英精密模具工业有限公司 Led driving power supply
CN202857051U (en) * 2012-09-04 2013-04-03 江苏尚明光电有限公司 Novel LED lamp drive device
CN203086808U (en) * 2013-01-17 2013-07-24 厦门理工学院 Mixed color LED adjustable color temperature constant illumination intelligent LED plane lighting device
CN203104850U (en) * 2013-03-18 2013-07-31 张新安 Light emitting diode (LED) lamp drive power supply adopting pulse width modulation (PWM) dimming
CN103228083A (en) * 2013-04-25 2013-07-31 陕西科技大学 Intelligent dimming LED driving power supply
CN103277759A (en) * 2013-05-13 2013-09-04 东莞市中实创半导体照明有限公司 Mains supply power-supplying LED integrated light source
CN203243575U (en) * 2013-05-16 2013-10-16 电子科技大学中山学院 High-power LED lighting driver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107454716A (en) * 2017-08-09 2017-12-08 山东旭程照明科技有限公司 A kind of light-operated driving control system of double induction LEDs
CN107454716B (en) * 2017-08-09 2023-07-21 山东旭程照明科技有限公司 Double-induction LED light-operated driving control system
CN107517516A (en) * 2017-08-15 2017-12-26 山东旭程照明科技有限公司 A kind of double bright control systems of radar induction LED driving
CN107517516B (en) * 2017-08-15 2023-10-27 山东旭程照明科技有限公司 Radar induction LED driven double-brightness control system

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Application publication date: 20140305