CN201954334U - Switching constant-current constant-brightness LED lighting source - Google Patents
Switching constant-current constant-brightness LED lighting source Download PDFInfo
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- CN201954334U CN201954334U CN2011200578719U CN201120057871U CN201954334U CN 201954334 U CN201954334 U CN 201954334U CN 2011200578719 U CN2011200578719 U CN 2011200578719U CN 201120057871 U CN201120057871 U CN 201120057871U CN 201954334 U CN201954334 U CN 201954334U
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- 238000005286 illumination Methods 0.000 claims description 18
- 230000006641 stabilisation Effects 0.000 claims description 11
- 238000011105 stabilization Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 230000003313 weakening effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 206010034960 Photophobia Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a switching constant-current constant-brightness LED (light-emitting diode) lighting source, which is formed by the method that a photosensitive resistor is connected with a constant-brightness lighting control circuit through a temperature-compensation circuit, an EMC (Electro Magnetic Compatibility) protective circuit is connected with an LED light source through a rectification circuit and a switching constant-current type LED driving circuit, and the constant-brightness lighting control circuit is connected with the switching constant-current type LED driving circuit. The conversion efficiency of the switching constant-current type LED driving circuit can reach more than 85%, the temperature-compensation circuit can be used for revising the nonlinearity of the photosensitive resistor on lighting intensity measurement at different ambient temperatures, simultaneously is used for detecting the radiation condition of the LED light source and is adjusted by the constant-brightness lighting control circuit so as to ensure the LED light source to work within a normal temperature range, the service life of the LED light source is prolonged, and the maintenance cost is reduced. The output current of the switching constant-current constant-brightness LED driving circuit is gradually increased along with the weakening of light rays, and is gradually decreased along with the gradual enhancing of light intensity so as to further save energy.
Description
Technical field:
The utility model relates to a kind of LED lighting source, especially has the LED lighting source of switch current stabilization and constant luminance.
Background technology:
High brightness, ultra-high brightness LED are solid state lighting electric light sources of new generation, because of a series of characteristics such as its brightness height, luminous efficiency height, life-span length are subjected to people's attention highly, have very application prospects.Current, in short supply and national the vigorously advocating under the energy-saving and cost-reducing background in global energy, along with science and technology development, at lighting field, the application of LED luminous product is just attracting common people's sight, characteristics such as it has energy-saving and environmental protection, the life-span is long, volume is little, luminous efficiency height can be widely used in illumination occasions such as home lighting, road lighting, city lighting.
In various illumination occasions, have only the led light source of efficient energy-saving not all right, also need the high-efficiency LED drive circuit and automatic control technology.Led drive circuit is the parts of the needed dc source of led light source that 220V electric main electric energy is changed into, and its characteristic has directly determined the service property (quality) of LED.Led drive circuit has constant voltage and constant current two big classes, and the constant-current type LED drive circuit has linear constant current implementation and switching mode constant current implementation again.The led drive circuit of comprehensive this several types of contrast, the switching mode constant-current drive circuit has efficient height, low cost and other advantages, is the most energy-conservation led drive circuit.The introducing of automatic control technology can further improve energy-saving effect, as patentee Zhou Anping, the name of application on April 9th, 2008 is called " Dimmable LED illuminating lamp " CN200820085623.3, open day: on January 7th, 2009, publication number: patent CN201177243), the Dimmable LED illuminating lamp that this utility model provides, with light emitting diode (LED), power circuit and LED driving circuit constitute, have in drive circuit with timer integrated circuit (NE555) is the light modulation pwm control circuit (I) of core, the light modulation pwm control circuit has PWM output (3), other has the luminous constant-current source chip circuit (II) that has voltage input end of driving LED, and this voltage input end is connected through resistance (R3) with PWM output in the light modulation pwm control circuit.Voltage input end input PWM at the constant-current source chip circuit can regulate the bright dark of LED.
Summary of the invention:
The purpose of this utility model is exactly to provide a kind of at the deficiencies in the prior art switch current stabilization drive circuit and constant luminance control is combined, and reaches when guaranteeing illuminating effect the constant luminance LED lighting source of a kind of switch current stabilization of conserve energy greatly.
The purpose of this utility model is achieved through the following technical solutions,
The constant luminance LED lighting source of switch current stabilization, be to be connected with constant luminance illumination control circuit 5 by photo resistance 3 temperature compensated circuit 4, EMC protection circuit 1 is connected with led light source 7 with switch constant-current type led drive circuit 6 through rectification circuit 2, and constant luminance illumination control circuit 5 connects and composes with switch constant-current type led drive circuit 6.
Switch constant-current type led drive circuit 6 is to be connected and composed through PWM controller 8 and high-power switch device 10 by current sensor 9.
Beneficial effect: switch constant-current type led drive circuit 6 transformation efficiencies can reach more than 85%, and high transformation efficiency means energy waste still less, lower caloric value, have application potential widely aspect the application of high-power LED light source.Temperature-compensation circuit 4 can be revised non-linear that the intensity of illumination of 3 pairs of photo resistance under the varying environment temperature measures, have the heating situation that detects led light source 7 simultaneously and adjust by constant luminance illumination control circuit 5, thereby guarantee that led light source is operated in normal temperature range, increase the service life, reduce maintenance cost.Constant luminance control function can automatically be adjusted the output current of switch constant-current type led drive circuit 6 according to the power of natural lighting, and it is constant that ambient brightness is remained.Such as, light dies down gradually at dusk, and the output current of switch constant-current type constant luminance led drive circuit can increase gradually; Early morning, the output current of switch constant-current type constant luminance led drive circuit can reduce gradually along with natural daylight intensity strengthens gradually.
Description of drawings:
The constant luminance LED lighting light source structure block diagram of Fig. 1 switch current stabilization
Fig. 2 is the structured flowchart of switch constant-current type led drive circuit 6 in the accompanying drawing 1
The specific embodiment:
Be described in further detail below in conjunction with drawings and Examples;
The constant luminance LED lighting source of switch current stabilization, be to be connected with constant luminance illumination control circuit 5 by photo resistance 3 temperature compensated circuit 4, EMC protection circuit 1 is connected with led light source 7 with switch constant-current type led drive circuit 6 through rectification circuit 2, and constant luminance illumination control circuit 5 connects and composes with switch constant-current type led drive circuit 6.
Switch constant-current type led drive circuit 6 is to be connected and composed through PWM controller 8 and high-power switch device 10 by current sensor 9.
Fig. 1 is the theory diagram of the constant luminance LED lighting source of switch current stabilization, comprises EMC protection circuit 1, rectification circuit 2, photo resistance 3, temperature-compensation circuit 4, constant luminance illumination control circuit 5, switch constant-current type led drive circuit 6 and led light source 7.
Fig. 2 is a switch constant-current type led drive circuit 6, is to be made of PWM controller 8, current sense circuit 9 and high-power switch device 10.The brightness control signal input of PWM controller is connected the output of constant luminance illumination control circuit 5; The output of current sensor 9 links to each other with PWM controller 8; The output of PWM controller 8 links to each other with high-power switch device 10.
EMC protection circuit 1 adopts the high ZMG2206-11 type EMC filter circuit of integrated level, and ZMG2206-11 type EMC filter circuit can effectively absorb surge, eliminate the influence of disturbing following section; Rectification circuit 2 adopts four silicon rectifier diodes to constitute full-wave rectifying circuit, finishes the conversion of AC-to DC; The QL5532 series visible light photo resistance to the visible light sensitivity is adopted in photo resistance 3; Temperature-compensation circuit 4 adopts the thermistor opposite with the photo resistance temperature characterisitic as temperature sensor; The input of constant luminance illumination control circuit 5 is through the intensity of illumination after the temperature-compensating, produces the control signal of output current size to switch constant-current type led drive circuit 6 according to illumination signal and the contrast of constant luminance value; PWM controller 8 adopts the PWM integral control circuit LNK306 of the switching mode constant current output of high integration in the switch constant-current type led drive circuit 6, and operating frequency is up to 66KHz, and efficient can reach more than 90%; Current sense circuit 9 adopts the precision resistance of little prevention; High-power switch device 10 adopts high withstand voltage nmos device; Led light source 7 adopts the cascaded structure of multiple optical diode.Civil power constitutes the circuit for power conversion part that high efficiency AC-DC, direct current become the switching mode constant current by EMC protection 1 and rectification circuit 2 and switch constant-current type led drive circuit 6; Photo resistance 3, temperature-compensation circuit 4 constitute the brightness sensing circuit, realize the measurement to ambient brightness; Thereby the output current that constant luminance illumination control circuit 5 is adjusted switch constant-current type led drive circuit 6 according to ambient brightness value is implemented under the different available light conditions led light source and works under different drive currents that ambient brightness is remained is constant.
The running of the constant luminance LED lighting source of switch current stabilization: civil power 220V alternating current is by EMC protection circuit 1, rectification circuit 2 becomes direct current and supplies with switch constant-current type led drive circuit 6, photo resistance 3, temperature-compensation circuit 4 is realized the luminous intensity detection circuit, input realizes switch constant-current type led drive circuit 6 output current regulating constant luminance illumination control circuit 5 according to light intensity, switch constant-current type led drive circuit 6 export to led light source 7, the change meeting of the luminous intensity of led light source 7 is fed back to constant luminance control circuit 5 by photo resistance 3, form the closed-loop control of constant luminance thus, finally realize the illumination of constant luminance.
Claims (2)
1. the constant luminance LED lighting source of a switch current stabilization, it is characterized in that, be to be connected with constant luminance illumination control circuit (5) by the temperature compensated circuit of photo resistance (3) (4), EMC protection circuit (1) is connected with led light source (7) with switch constant-current type led drive circuit (6) through rectification circuit (2), and constant luminance illumination control circuit (5) connects and composes with switch constant-current type led drive circuit (6).
2. according to the constant luminance LED lighting source of the described a kind of switch current stabilization of claim 1, it is characterized in that switch constant-current type led drive circuit (6) is to be connected and composed through PWM controller (8) and high-power switch device (10) by current sensor (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200578719U CN201954334U (en) | 2011-03-08 | 2011-03-08 | Switching constant-current constant-brightness LED lighting source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200578719U CN201954334U (en) | 2011-03-08 | 2011-03-08 | Switching constant-current constant-brightness LED lighting source |
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| CN201954334U true CN201954334U (en) | 2011-08-31 |
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| CN2011200578719U Expired - Fee Related CN201954334U (en) | 2011-03-08 | 2011-03-08 | Switching constant-current constant-brightness LED lighting source |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102932996A (en) * | 2012-11-09 | 2013-02-13 | 江苏中江物联网科技有限公司 | Intelligent micro-control lamplight system |
| CN103843460A (en) * | 2011-10-12 | 2014-06-04 | Dialog半导体有限公司 | Controllers for solid state light bulb assemblies |
| CN103851389A (en) * | 2014-01-15 | 2014-06-11 | 深圳市瑞丰光电子股份有限公司 | LED (light-emitting diode) optical engine module and lighting device |
| CN114967809A (en) * | 2022-05-24 | 2022-08-30 | 芯海科技（深圳）股份有限公司 | Current stabilizing circuit and current stabilizing method thereof, integrated circuit and electronic equipment |
-
2011
- 2011-03-08 CN CN2011200578719U patent/CN201954334U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103843460A (en) * | 2011-10-12 | 2014-06-04 | Dialog半导体有限公司 | Controllers for solid state light bulb assemblies |
| CN103843460B (en) * | 2011-10-12 | 2016-04-13 | Dialog半导体有限公司 | For the controller of Solid-state light bulb assembly |
| CN102932996A (en) * | 2012-11-09 | 2013-02-13 | 江苏中江物联网科技有限公司 | Intelligent micro-control lamplight system |
| CN102932996B (en) * | 2012-11-09 | 2015-09-30 | 江苏中江物联网科技有限公司 | Intelligent micro-control lamplight system |
| CN103851389A (en) * | 2014-01-15 | 2014-06-11 | 深圳市瑞丰光电子股份有限公司 | LED (light-emitting diode) optical engine module and lighting device |
| CN114967809A (en) * | 2022-05-24 | 2022-08-30 | 芯海科技（深圳）股份有限公司 | Current stabilizing circuit and current stabilizing method thereof, integrated circuit and electronic equipment |
| CN114967809B (en) * | 2022-05-24 | 2023-10-27 | 芯海科技（深圳）股份有限公司 | Current stabilizing circuit, current stabilizing method thereof, integrated circuit and electronic equipment |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20150308 |
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| EXPY | Termination of patent right or utility model |