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Insulation type general use illumination LED driving circuit
InactiveCN101227779AAchieving Power Factor CorrectionLow costElectric light circuit arrangementEmergency protective arrangements for limiting excess voltage/currentPower factorTransformer
The invention belongs to the electronic technical field and relates to a versatile lighting LED driving circuit. The invention comprises an input rectifier circuit, a power factor correction (PFC) control circuit, a transformer surge current and peak voltage absorption circuit, an optical coupler isolation feedback circuit, an isolated switching transformer and an unidirectional rectifier output circuit. The invention takes a power management chip NCP1653 of the OnSemi Company as a control core, primary current of the switching transformer is checked to realize the power factor correction function, a circuit topological structure is a flyback isolated type, the working mode is a continuous conduction mode, the circuit topological structure has the functions of power factor correction, light modulation, constant current constant voltage output and absorbing the surge current of switch element guide circuit instant and the peak voltage of cutting instant, simultaneously, since the invention adopts the power management chip NCP1653, a large amount of peripheral circuit can be saved, and thereby the invention is has the advantages of low cost and small volume and is suitable for batch production.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Energy-saving photovoltaic agricultural greenhouse with dimming function
ActiveCN104170685AWith dimming functionImprove work efficiencyPhotovoltaic supportsClimate change adaptationGreenhouseAgricultural engineering
The invention relates to an energy-saving photovoltaic agricultural greenhouse with a dimming function. The energy-saving photovoltaic agricultural greenhouse comprises a photovoltaic agricultural greenhouse body, a cleaning device, a condensation removal device, a drip irrigation, sprinkling irrigation and fertilization integrated device and a heat exchange device. The energy-saving photovoltaic agricultural greenhouse has the advantages that working efficiency of photovoltaic modules is improved, energy resources are saved, and the growing environment of crops is optimized.
Owner:SUZHOU AIKANG LOW CARBON TECH INST
Infrared detecting device and method for target recognition in sea surface sun bright band
ActiveCN106706132ASuppresses measurement errorsEliminate Radiation Beam Splitting ErrorsRadiation pyrometryOptical detectionTemperature controlMiddle infrared
The invention discloses an infrared detecting device and method for target recognition in a sea surface sun bright band. According to the infrared detecting device, the lenses of two middle infrared cameras form an angle; an infrared polarizer is arranged in front of the lens of a middle infrared camera; a wire gating polarization device is arranged at the light path intersection in front of the lenses of two middle infrared cameras; a diaphragm is arranged on the light path in front of and the wire gating polarization device; a germanium sealing window is arranged in front of the diaphragm; the germanium sealing window and a temperature control hood form a sealed temperature control cavity; and the middle infrared cameras, the infrared polarizer, the wire gating polarization device and the diaphragm are arranged in the temperature control cavity. When detection is carried out, the system of the infrared detecting device is calibrated; the image of the sea surface sun bright band is collected; and target recognition is finally realized after image processing. According to the invention, the image gray scale difference between the target and the surrounding sea area is improved; equal gray-scale massive sea area appearing in the bright band sea area is reduced; and the target recognition ability in the sea surface sun bright band is improved.
Owner:YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
High-voltage linear constant-current LED drive circuit
ActiveCN105072742AFunction increaseWith dimming functionElectric light circuit arrangementPower factorVoltage drop
The present invention discloses a high-voltage linear constant-current LED drive circuit, which comprises a rectifier and filter circuit, an LED load group, an op-amp power supply circuit, a constant-current control circuit and a PFC adjusting circuit. The constant-current control circuit ensures the current flowing through the LED load group to be constant based on the feedback control process. The PFC adjusting circuit improves the waveform of the input current and increases the power factor through adjusting the voltage drop of the LED load group. The rectifier and filter circuit is respectively connected with the op-amp power supply circuit, the LED load group and the PFC adjusting circuit. The op-amp power supply circuit is connected with the constant-current control circuit and the PFC adjusting circuit. The constant-current control circuit is connected with the LED load group. The PFC adjusting circuit is connected with the LED load group. The circuit is simple and reasonable in structure, wherein the linear constant-current function of high PFC, high efficiency and high flexibility is realized based on the current feedback control and the lamp bead segmented control.
Owner:FOSHAN TOPDAY OPTOELECTRONICS TECH
Light dimming method using switch-type switch and related lighting system
ActiveCN102378440AWith dimming functionElectric light circuit arrangementEnergy saving control techniquesEngineeringLighting system
The invention discloses a light dimming method using a switch-type switch and a related lighting system. In the light dimming method, the brightness of a lamp tube group is adjusted according to the state of the switch-type switch. The light dimming method comprises the following steps of: when the lamp tube group is in an initial state, determining the moment to be a first state of the switch-type switch; after the switch-type switch is switched to a second state from the first state at a first time point, gradually adjusting the brightness of the lamp tube group to second brightness from first brightness within the light dimming time from the first time point; within the light dimming time from the first time point, switching the switch-type switch to the first state from the second state at a second time point, switching to the second state from the first state at a third time point; and when the interval between the second time point and the third time point is not greater than a turn-off time, remaining the lamp tube group at the brightness at the second time point. By the method, a light dimming function can be provided by using a conventional switch-type switch.
Owner:普诚创智(成都)科技有限公司
Fluorescent lamp electronic ballast and lighting device
InactiveCN101827488AIncrease powerStable jobElectrical apparatusElectric lighting sourcesActive power factor correctionEffect light
The invention is applicable to the field of fluorescent lamp lighting, and provides a fluorescent lamp electronic ballast and a lighting device; the fluorescent lamp electronic ballast comprises an EMI circuit, a rectifying circuit, an oscillating circuit, an inverting circuit, an active power factor correction circuit, a control circuit and a sampling circuit, wherein the input end of the activepower factor correction circuit is connected to the output end of the rectifying circuit, and a first output end is connected to the input end of the inverting circuit; the input end of the sampling circuit is connected with a fluorescent lamp and carries out sampling on working current of the fluorescent lamp; and the sampling end of the control circuit is connected to the output end of the sampling circuit, the input end thereof is connected to a second output end of the active power factor correction circuit, the output end thereof is connected to the control end of the oscillating circuit, and the control end thereof is connected to the control end of the inverting circuit. The electronic ballast provided by the invention adopts the active power factor correction circuit, and leads a conduction angle of an input circuit to be widened by combining the control circuit and the sampling circuit, thus leading the electronic ballast to work stably in the wide voltage range of 85V-300V.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1
High-power dimming electrodeless lamp
InactiveCN102307424ARealize dimming functionReduce temperature riseElectrical apparatusElectric lighting sourcesActive power factor correctionAlternating current
The invention discloses a high-power dimming electrodeless lamp. The high-power dimming electrodeless lamp comprises an anti-electromagnetic interference filter, a bridge rectifier module, an active power factor corrector, a half-bridge inverter oscillatory circuit, a power output device, a starting controller, a high-frequency coupler, a dimming circuit and an HB0809 integrated circuit, wherein the half-bridge inverter oscillatory circuit is used for converting a direct current voltage into a high-frequency alternating voltage; the power output device is used for supplying output power to the half-bridge inverter oscillatory circuit when the half-bridge inverter oscillatory circuit works; the starting controller is used for controlling the turning on and turning off of the electrodeless lamp; the high-frequency coupler is used for coupling electric energy of the active power factor corrector and the power output device to the lamp tube of the electrodeless lamp; the dimming circuit is connected with an externally connected dimming control circuit; when the externally connected dimming control circuit supplies a 0 to 10-volt direct current (VDC) dimming control voltage signal to the dimming circuit, the dimming circuit works and then converts the alternating voltage into a 18-volt direct voltage; and the HB0809 integrated circuit is connected to the half-bridge inverter oscillatory circuit and used for controlling the alternately turning on and turning off of a first metal oxide semiconductor (MOS) tube and a second MOS tube in the half-bridge inverter oscillatory circuit to set working frequency, ignition time and ignition frequency. By a dimming electrodeless lamp circuit, a dimming function of the high-power electrodeless lamp can be realized.
Owner:NINGGUO HUBANG ELECTRONICS TECH
Dimmable light-emitting-diode illumination system, and driving device and driving method thereof
InactiveCN103987148AWith dimming functionElectrical apparatusElectric light circuit arrangementEngineeringElectric signal
A dimmable light-emitting diode illumination system comprises a light-emitting diode lamp group (10), a switch (20) and a driving apparatus (30). The light-emitting diode lamp group (10) is used for receiving an electric signal and generating light. The switch (20) is connected to the power supply (100) for turning on and off under control in preset time to generate a pulse signal. The driving apparatus (30) is electrically connected to the switch (20) and the light-emitting diode lamp group (10) for receiving electric energy of the power supply (100) and converting the electric energy to an electric signal for the light-emitting diode lamp group (10) when the switch (20) is turned on to drive the light-emitting diode lamp group (10) to generate the light. In addition, the driving apparatus (30) stores an overall brightness value, a preset illumination mode and a brightness adjusting mode. When receiving the pulse signal, the driving apparatus (30) uses one of the modes to drive the light-emitting diode lamp group (10) to generate the light.
Owner:HEP TECH +1
Multifunctional solar shutter system
ActiveCN107060610AImprove utilizationImprove power generation efficiencyPhotovoltaic supportsSolar heating energyWindow shutterEngineering
Disclosed is a multifunctional solar shutter system. A shutter is composed of a rectangular frame and multiple sets of shutter blades mounted in the frame and separated from one another. Each set of shutter blades comprises the fixed shutter blade and the rotatable shutter blade. Heat absorption power generation thin films on the fixed shutter blades are electrically connected with an accumulator. The output end of the accumulator is electrically connected with a motor arranged in the shutter. A heat collecting pipe is mounted in the shutter and is a sinuous coil pipe coiled in the shutter to exchange heat with water in a water tank. A set of connecting rods are arranged in the shutter for rotating the rotatable shutter blades to change the direction of solar rays reflected onto the fixed shutter blades by the light reflecting faces of the rotatable shutter blades to fully guide the solar energy onto the fixed shutter blades for work, and the solar energy is utilized in maximum under the situation of the equal solar irradiation area. Solar power generation and solar heat generation functions are achieved, besides, functions of automatic shutter light adjusting and sun shading are achieved.
Owner:刘尚宇
Novel colored woven trim fabric and weaving process thereof
The invention discloses a novel yarn-dyed window dressing shell fabric and a weaving process thereof, which belongs to the technical field of window dressing shell fabric. The shell fabric comprises light transmitting parts and sun shading parts which are arranged cyclically and alternately, wherein warp-wise raw materials of the light transmitting parts and the sun shading parts consist of semi-gloss polyester low-elasticity yarn A and semi-gloss single-fiber polyester filaments B; the proportion of A and B is 2:1; a widthwise raw material of the light transmitting parts is bright multi-fiber polyester filaments C; and a widthwise raw material of the sun shading parts is dyed low-elasticity yarn D. The novel yarn-dyed window dressing shell fabric has the function of adjusting light; as the light transmitting parts and the sun shading parts are directly and integrally woven on a loom, the light transmitting parts and the sun shading parts are organically combined, are uniform, stiff and smooth in appearance and good in hang-down feeling, and have no splicing trace; in addition, as the light transmitting parts adopt 3 / 3 false yarn tissue and the sun shading parts adopt 1 / 2 twill tissue, the shell fabric has the advantages of good rigidity and shear resistance.
Owner:ZHEJIANG YONGSHUN WINDOW MATERIALS CO LTD
Transparent optical article
InactiveCN1365455AWith dimming functionSynthetic resin layered productsPolarising elementsAdhesivePolarizer
A polarizing / dimming transparent optical article having both a polarizing function and a dimming function, such as polarizing / dimming sunglasses, goggles, and lenses. The transparent optical article is a transparent optical article of a laminated structure containing one layer of polarizer sheet, wherein at least one layer other than the polarizer sheet has a dimming function. A plurality of sheets provided with one layer of polarizer sheet and at least one layer of other sheet are bonded together by an adhesive or a tackifier to constitute a composite sheet-like item, and at least one layer of the other sheet and the adhesive or the tackifier in the composite sheet-like item has a dimming function.
Owner:SWANS
A dual-frequency mixed spectrum type and pulse width regulation type dimming electronic ballast
InactiveCN101217848ANo flickering phenomenonChange brightnessElectrical apparatusElectric lighting sourcesDriver circuitDual frequency
The invention provides a dual-frequency lighting mixed pulse width modulation dimming electronic ballast, relating to an electronic ballast. The invention provides a dual-frequency lighting mixed pulse width modulation dimming electronic ballast which can ensure the lightness of the lamp to be in 100% to 30% with reliable light modulation, leads to no flashing lamp phenomenon, is convenient for being applied in single-line illumination control circuits and can be widely applied to existing energy-saving lamps and ballasts. The invention is provides with a rectification circuit, a zero cross detection circuit, a system control circuit, a dual-frequency point power output circuit and a lamp driving circuit. The input terminal of the rectification circuit is externally connected with a power supply; the input terminal of the zero cross detection circuit is connected with the output terminal of the rectification circuit; the input terminal of the system control circuit is connected with the output terminal of the zero cross detection circuit; the power supply input terminal of the dual-frequency point power output circuit is connected with the output terminal of the rectification circuit; the control input terminal of the dual-frequency point power output circuit is connected with the system control circuit; the input terminal of the lamp driving circuit is connected with the output terminal of the dual-frequency point power output circuit; the output terminal of the lamp driving circuit is externally connected with loads.
Owner:李东方 +2
Endoscope probe and novel inherent fluorescence tumor diagnostic apparatus
InactiveCN106037617AEasy diagnosisWith dimming functionMedical imagingVaccination/ovulation diagnosticsFluorescenceDiagnosis methods
The invention provides an endoscope probe. The endoscope probe comprises a light-guide fiber probe. A camera shooting channel, a fluorescence-excited light output channel, a white light output channel and a biopsy channel are arranged in the light-guide fiber probe. A camera is installed in the camera shooting channel, and a white light source is installed in the white light output channel. A camera signal output port, a fluorescence-excited light output interface, a power interface and a biopsy channel inlet are formed in the rear end of the light-guide fiber probe. Novel inherent fluorescence tumor diagnostic apparatus comprises the endoscope probe and a base. A displayer is arranged on the upper surface of the base, an inherent fluorescence generator and a fluorescence-excited light output end are arranged on the side face of the base, the fluorescence-excited light output interface is connected with the fluorescence-excited light output end, and the camera signal output port is connected with the displayer through a guide wire. According to the diagnostic apparatus, a former diagnosis method is abandoned, through perfect combination with a hysteroscope, precancerous lesions can be diagnosed earlier, and precancerous lesion tissue can be accurately found and taken out through the biopsy channel.
Owner:XUZHOU JINWEI MEDICAL ELECTRONICS EQUIP CO LTD
Wide input range outdoor optical recording LED high power density conversion method
InactiveCN107154669ASimple structureReduce lossElectroluminescent light sourcesElectric powerEngineeringSolar cell
The invention discloses a wide input range outdoor optical recording LED high power density conversion method. A charging part having an MPPT function and an LED constant current driving part are provided. By deeply analyzing basic characteristics of a solar cell, a storage battery, and an LED, a bidirectional synchronous rectification DC-DC converter having a main topology based on a Buck-Boost type is designed. During the forward operation of the DC-DC converter, a charging circuit adopts a Buck type topological structure, and is used to charge the storage battery by using an MPPT, constant voltage, constant current combination three-phase charging method. During the backward operation of the DC-DC converter, a discharging circuit adopts a Boost type topological structure, the constant voltage output of the LED lamp is realized, and a PWM dimming function is provided. By adopting an improved control method based on a conventional perturbation observation method, and according to the I-V characteristic of the solar cell, an increment of each time is converted into the step size of the next time actually approaching a control voltage, and therefore overcontrol is prevented, and frequency perturbation is reduced during a steady state of a component.
Owner:深圳市和拓创新科技有限公司 +1
Multifunctional alarm clock
InactiveCN105511249AWith reminder functionHas a heating effectAcoustic time signalsBatteries circuit arrangementsEffect lightComputer module
The invention provides a multifunctional alarm clock and belongs to the control field. The multifunctional alarm clock includes a controller module, a power source module, a voice module, a key module, a small-sized fan module, a heating fan module and a lighting lamp module; the output end of the power souse module is connected with one input end of the controller module, so that the power souse module provides power for the controller module; the input ends of the voice module, the small-sized fan module, the heating fan module and the lighting lamp module are connected with the output ends of the controller module; and the output end of the key module is connected with the other input end of the controller module. The voice calling of the voice module is adopted to replace traditional alarm, so that the alarm clock has a prompting function; in summer, the small-sized fan module can be turned on, so that a daily fan can be replaced; in winter, the heating fan module can be turned on, so that a heating effect can be realized; the lighting lamp module is an LED lighting lamp and has a dimming function; and therefore, with the multifunctional alarm clock adopted, the problem of functional singleness of an existing alarm clock can be solved.
Owner:朱菡雯
Sunshade apparatus
ActiveCN103568785AWith dimming functionIncrease overhead clearanceMechanical apparatusAntiglare equipmentEngineering
Provided is a sunshade apparatus (1) disposed under a sunroof panel (S3) installed in a fixed roof (S1) of a vehicle (S), comprising a frame (3) having a plurality of frame openings (13) arranged in a width direction of the vehicle, and a plurality of polarizing panel sets (5) each of which is disposed correspondingly to one of the frame openings. The frame is formed to be higher in the middle portion thereof than both end portions thereof in the width direction so as to follow the shape of the fixed roof (S1), and each polarizing panel set inclines to be higher as approaching the middle portion of the vehicle in the width direction.
Owner:YACHIYO IND CO LTD
Split type multi-energy-saving lamp illumination system
InactiveCN101541133AImprove power factorExtend your lifeElectrical apparatusElectric lighting sourcesFiltrationWorking temperature
The invention provides a split type multi-energy-saving lamp illumination system. The system is formed by connecting a bridge-type output end of a rectifying circuit to a high-frequency transformation circuit, then connecting the half-bridge output of the high-frequency transformation circuit to a filter circuit, and finally connecting to a driving circuit. The invention comprises the following steps: firstly, rectifying an AC and correcting by adding APFC power; then, carrying out high-frequency transformation and adding frequency modulation to adjust light to obtain the high-frequency AC; and finally connecting to a plurality of driving circuits by LC filtration to respectively drive a plurality of energy-saving lamps. By adopting the technical scheme, one high-performance ballast can drive a plurality of energy-saving lamps, and has the light-adjusting function without additionally arranging control circuits on the lamps. The split type energy-saving lamps have high power factors for avoid adding APFC circuit corrected power on each lamp. Due to the reasons, the split type energy-saving lamps can use less electronic parts, decreases the size and the finished products, has low working temperature and longer electronic part service life than that of a common energy-saving lamp and reduces the generation of electronic garbage so as to be environment-friendly and energy-saving and have practical values.
Owner:ZHUJIANG SWITCH FACTORY GUANGDONG PROV
Compact light-regulation electromagnet induction lamp
InactiveCN100499956CWith dimming functionWith miniaturizationElectrical apparatusElectric lighting sourcesPower factorFluorescence
Owner:SHANGHAI HONGYUAN LIGHTING & ELECTRICAL EQUIP
Light emitting diode (LED) drive unit
InactiveCN104159356AAvoid damageReduce manufacturing costElectric light circuit arrangementMOSFETControl signal
The invention provides a light emitting diode (LED) drive unit, comprising a microprocessor having a control signal output end, a constant current control circuit having an integrated circuit, and at least one dimming circuit having a MOSFET (Metal-Oxide -Semiconductor Field Effect Transistor). The integrated circuit has an LED output positive end and an LED output negative end, wherein the LED output positive end is electrically connected to a positive end of an LED module group, and the LED output negative end is electrically connected to a source electrode of the MOSFET. A drain electrode of the MOSFET is electrically connected to a negative end of the LED module group. A signal output end of the microprocessor is electrically connected to a gate electrode of the MOSFET, and outputs a control signal for controlling on-off of the LED module group, so that the working cycle of the LED module group is adjusted, and the purpose of dimming is achieved further. The invention can select an integrated circuit without a PWM function for lowering manufacturing cost.
Owner:连展科技电子(昆山)有限公司
LED lamp with dimming function
PendingCN111712009AWith dimming functionDimming function hasElectrical apparatusElectric circuit arrangementsDimmerControl theory
The invention relates to an LED lamp with a dimming function. The LED lamp comprises an LED lamp body; a dimming assembly arranged on the LED lamp body and changing the resistance value of the dimmingassembly according to the adjusting signal and / or operation; a control device arranged in the LED lamp body, electrically connected with the dimming assembly and used for detecting the resistance value of the dimming assembly and adjusting the output current according to the resistance value of the dimming assembly; and an output unit connected with the control device, receiving the output current and transmitting the output current to the LED lamp. The LED lamp has the dimming function, has no requirement for the dimming function of a chip, does not need to use a dimmer or be matched with agateway, a sensor, a remote controller and the like, and is simple in dimming function, low in cost and convenient to use.
Owner:SHENZHEN TOPBAND CO LTD
Compact light-regulation electromagnet induction lamp
InactiveCN1561152AWith dimming functionWith miniaturizationElectrical apparatusElectric lighting sourcesPower factorFluorescence
This invention is about lamp especially about compact adjustable electromagnetism inductive lamp. It contains a magnetic induction coil, it can be controlled by the circuit of high frequency current transport to the magnetic ring, and the ring produces higher strength of magnetic induction. The alternating magnetic field bring electric magnetic energy come into the inner of the lamp, then produce voltage to make the gas and mercury ionize. The ionized atoms of mercury project to ultraviolet ray shoot on the powder of fluorescence then the lamp is bright.
Owner:SHANGHAI HONGYUAN LIGHTING & ELECTRICAL EQUIP
High-density packaged light-emitting diode (LED) desk lamp
ActiveCN102235589ASmall sizeProtect eyesElectric lightingElectric light circuit arrangementEngineeringHigh density
The invention provides a high-density packaged light-emitting diode (LED) desk lamp. The high-density packaged LED desk lamp comprises a lamp holder, wherein not less than 6 LED chip modules are packaged in each 7mm unit area of a lamp holder bottom plate; 120 LED chip modules are packaged on the 140mm lamp holder bottom plate; and the LED desk lamp is connected with a 15W12V low-voltage external constant current power supply. The whole desk lamp is made of an aluminum alloy material and can radiate high-density packaged LEDs to avoid the light attenuation of the LEDs; the high-density packaged LEDs are adopted, so the whole high-density packaged LED desk lamp has small volume and is energy-saving and environment-friendly; the desk lamp has a dimming function and can realize stepless dimming in the range of 0 to 100 percent; and the LED desk lamp does not have stroboflash and has the function of protecting eyes.
Owner:SHANGHAI CHARLES ELECTRONICS +1
Electrodeless lamp device having light adjusting function
InactiveCN102840476AWith dimming functionAppropriate intensityElectrical apparatusElectric circuit arrangementsIlluminanceEngineering
The invention relates to an electrodeless lamp device having a light adjusting function. The electrodeless lamp device is connected with an external power source, and comprises an electrodeless lamp, a ballast, and a control unit. The electrodeless lamp comprises a lamp body, a magnetic ring coiled on the outer side of the lamp body, a coil used to wind the magnetic ring. The ballast is electrically connected with the coil, and the control unit is electrically connected with the ballast, and can be used to control the ballast. The ballast can be used to convert the external power source into a frequency voltage, therefore the required color temperature and the wave length strength of the electrodeless lamp can be provided. The environmental illumination can be controlled, the proper light can be provided, and the illumination costs can be reduced.
Owner:陈启彰
Split type multi-energy-saving lamp illumination system
InactiveCN101541133BImprove power factorExtend your lifeElectrical apparatusElectric lighting sourcesFiltrationWorking temperature
Owner:ZHUJIANG SWITCH FACTORY GUANGDONG PROV
Cold cathode desk lamp
InactiveCN101943348BReduce lossesIncrease illuminationElectric lighting sourcesGas discharge lamp detailsEffect lightCold cathode
The invention relates to a cold cathode desk lamp which comprises a lamp cap, a lamp holder, a switch and a power line, wherein a rotating device is arranged on the lamp holder; the lamp cap is connected with the lamp holder through the rotating device; a light source fixing plate is arranged in the lamp cap; a cold cathode lamp and an inverter are fixed on the light source fixing plate; a reflective material is arranged on the light source fixing plate; the caliber of the cold cathode lamp is 2.4mm-8.0mm, and the cold cathode lamp is an M-shaped lamp, a U-shaped lamp, an MU-shaped lamp or a straight lamp; an intelligent IC half-bridge driven control chip is adopted by the inverter; and a touch switch is adopted. The cold cathode desk lamp of the invention has stable light rays, frequent switching resistance and good color rendering, does not have stroboscopic and flickering phenomena, can effectively protect the vision and effectively improve the lighting effect, has long service life, and is favorable for environmental protection.
Owner:YICHANG JINSEN OPTRONICS TECH
LED power circuit with dimming function
InactiveCN106793296ASimple structureImprove practicalityElectrical apparatusElectroluminescent light sourcesCurrent limitingDimmer
The invention discloses an LED power circuit with dimming function, comprising an input protection unit, a current-limiting buck module, an adjustable light rectifier chip, a voltage dividing unit and an LED set; the input end of the input protection unit is connected with an alternating current power source, the output end of the input protection unit is connected with the current-limiting buck module and the adjustable light rectifier chip sequentially, two output ends of the adjustable light rectifier chip are connected with the input end of the voltage dividing unit and one input end of the LED set respectively, and the output end of the voltage dividing unit is connected with the other input end of the LED set. The invention discloses the LED power circuit with dimming function which is provided with the adjustable light rectifier chip and fitly and externally connected with an electronic ballast and a dimmer, and dimming can be provided for the LED set. Adding a dimming circuit to the power circuit is not required any longer; compared with existing power circuits, the LED power circuit is simple in structure and high in practicality, and components use small space.
Owner:HUIZHOU YOUTECH OPTOELECTRONICS TECH
Dimmable LED constant current source driving circuit
InactiveCN111542156AReduce lossExtend your lifeElectrical apparatusSignal processing circuitsLight signal
The invention discloses a dimmable LED constant current source drive circuit which comprises a dimming signal processing circuit for receiving dimming voltage, converting the dimming voltage into an input signal and transmitting the input signal to a current control circuit; a current acquisition circuit which is used for feeding back a signal representing the real-time current of the circuit to the current control circuit; the current control circuit which receives the input signal transmitted by the dimming signal processing circuit and the signal fed back by the current acquisition circuit,and outputs a signal to a boost converter control circuit; a voltage acquisition circuit which feeds back an output voltage magnitude signal to the boost converter control circuit; the boost converter control circuit which controls a boost converter circuit to output the corresponding voltage so that the output current is constant. The dimmable constant-current source is a single-stage boosting circuit, the function loss of the dimmable constant-current source is only one stage and is much smaller than that of a traditional two-stage circuit, the heat production amount is reduced, and the service life of components is indirectly prolonged; through actual calculation and measurement, the efficiency is as high as 98%, and the practicability is high.
Owner:马少峰
Non-isolating switching power supply with high efficiency and high current regulation ratio
PendingCN105471293AImprove efficiencyReduce volumeEfficient power electronics conversionAc-dc conversionPower flowHeat sink
The invention relates to a non-isolating switching power supply with high efficiency and a high current regulation ratio. The power-supply efficiency can be up to 98% and considerably exceeds 90% power-supply efficiency of an existing switching power supply; and the most important feature is that the output current regulation ratio of the power supply even reaches five per hundred thousand per volt, and considerably exceeds the level of the similar power supply at present. The power supply is small in volume; the number of used elements can be as low as15; and a cooling fin is not needed, so that the cost is low. The output power of the non-isolating switching power supply can reach 150W; the output voltage can be up to 300V; and the lowest output voltage is 0V, so that a short circuit can be achieved; and the non-isolating switching power supply can also have a dimming function. If the non-isolating switching power supply is applied to an LED lamp, the technical problems that an existing drive power supply for the LED lamp is relatively high in energy consumption, not high enough in power-supply efficiency, poor in stability, easy to damage and the cooling fin is a mustare solved.
Owner:张光阳
Fluorescent lamp electronic ballast and lighting device
InactiveCN101827488BIncrease powerStable jobElectrical apparatusElectric lighting sourcesActive power factor correctionEffect light
The invention is applicable to the field of fluorescent lamp lighting, and provides a fluorescent lamp electronic ballast and a lighting device; the fluorescent lamp electronic ballast comprises an EMI circuit, a rectifying circuit, an oscillating circuit, an inverting circuit, an active power factor correction circuit, a control circuit and a sampling circuit, wherein the input end of the activepower factor correction circuit is connected to the output end of the rectifying circuit, and a first output end is connected to the input end of the inverting circuit; the input end of the sampling circuit is connected with a fluorescent lamp and carries out sampling on working current of the fluorescent lamp; and the sampling end of the control circuit is connected to the output end of the sampling circuit, the input end thereof is connected to a second output end of the active power factor correction circuit, the output end thereof is connected to the control end of the oscillating circuit, and the control end thereof is connected to the control end of the inverting circuit. The electronic ballast provided by the invention adopts the active power factor correction circuit, and leads a conduction angle of an input circuit to be widened by combining the control circuit and the sampling circuit, thus leading the electronic ballast to work stably in the wide voltage range of 85V-300V.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1
A high voltage linear constant current led drive circuit
ActiveCN105072742BFunction increaseWith dimming functionElectric light circuit arrangementPower factorEngineering
The invention discloses a high-voltage linear constant-current LED drive circuit, which includes a rectification filter circuit, an LED load group, an operational amplifier power supply circuit, a constant-current control circuit and a PFC adjustment circuit, wherein: the constant-current control circuit uses feedback control to maintain Through the constant current in the LED load group; the PFC adjustment circuit improves the waveform of the input current by adjusting the voltage drop of the LED load group, and improves the power factor; the rectification filter circuit is respectively connected to the operational amplifier power supply circuit, the LED load group and PFC adjustment circuit; the operational amplifier power supply circuit is connected to the constant current control circuit and the PFC adjustment circuit, the constant current control circuit is connected to the LED load group, and the PFC adjustment circuit is connected to the LED load group. The circuit structure of the present invention is simple and reasonable, and realizes the linear constant current function with high PFC, high efficiency and high flexibility through current feedback control and segmental control of lamp beads.
Owner:FOSHAN TOPDAY OPTOELECTRONICS TECH
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