Patent application number | Description | Published |
20090302768 | INVERTER CIRCUIT FOR LIGHT SOURCE - An inverter circuit drives a light source module. An input signal circuit provides electrical signals. A power stage circuit converts the electrical signals to square-wave signals. A transformer circuit converts the square-wave signals to alternating current (AC) signals capable of powering the light source module. A voltage detection circuit detects voltage applied on the light source module so as to output a detected voltage signal. A feedback circuit feeds current flowing through the light source module so as to output a current feedback signal. A protection circuit is connected to the voltage detection circuit and the feedback circuit, for outputting a latch signal according to the detected voltage signal or the current feedback signal. A pulse-width modulation control circuit outputs a switch signal to the power stage circuit according to the latch signal. The input signal circuit also provides the electrical signals to the protection circuit. | 12-10-2009 |
20100182347 | DUAL-LAMP DRIVING CIRCUIT - A dual-lamp driving circuit includes a first frequency switch control circuit, a second frequency switch control circuit, a pulse-width modulation (PWM) control circuit, a first power stage circuit, a second power stage circuit, a conversion circuit, and a feedback circuit. The first frequency switch control circuit receives a first enable signal, and outputs a first frequency switch signal according to the first enable signal. The second frequency switch control circuit receives a second enable signal, and outputs a second frequency switch signal according to the second enable signal. The PWM control circuit outputs various PWM control signals according to the first frequency switch signal and the second frequency switch signal. The feedback circuit feeds back a first current signal from the first lamp to the frequency switch control circuit, and a second current signal from the second lamp to the frequency switch control circuit. | 07-22-2010 |
20100289425 | BACKLIGHT DRIVING SYSTEM UTILIZING ONE PWM CONTROLLER TO CONTROL TWO BACKLIGHT UNITS SEPARATELY - A backlight driving system comprises a first inverter circuit, a second inverter circuit, a pulse width modulation (PWM) controller, a frequency regulator and a switch circuit. The pulse width modulation (PWM) controller generates an illumination signal to control the first and second inverter circuits to illuminate first and second backlight units in response to a first enable signal, and generates a maintaining signal to control the first and second inverter circuits to maintain stable lighting of the first and second backlight units in response to a first feedback signal. The frequency regulator controls the PWM controller to generate the illumination signal and the maintaining signal in response to a second enable signal and a second feedback signal, respectively. The switch circuit connects the PWM controller to the second inverter circuit in response to the second enable signal. | 11-18-2010 |
20100328837 | ION GENERATOR AND HEAT DISSIPATION DEVICE USING THE SAME - An ion generator to generate ion flow to ventilate heat comprises an emitter, a receiver and a power supply. The emitter comprises a needle electrode having one needle shaped tip configured as a discharging portion. The receiver comprises a plurality of flow channels for airflow and at least one receiving portion. The at least one receiving portion comprises a line edge arranged around a concave spherical surface, and the discharging portion is at a substantial center of the concave spherical surface. The power supply provides a voltage potential difference between the discharging portion of the emitter and the receiving portions of the receiver. | 12-30-2010 |
20110103114 | SOLAR POWER CONVERSION CIRCUIT AND POWER SUPPLY SYSTEM USING THE SAME - A solar power supply system includes at least one solar power conversion circuit and an inverter circuit. Each solar power conversion circuit comprises a solar module and a direct current (DC) module. The solar module converts the solar power into the DC signals. The DC module with two-stage conversion comprises a DC transformer circuit and a maximum power point tracking circuit, to boost the DC signals and adjust output power of the solar module to a maximum value. The inverter circuit converts the boosted DC signals output from the solar power conversion circuits into AC signals and combines the AC signals into the AC utility network. | 05-05-2011 |
20110253348 | IONIC THERMAL DISSIPATION DEVICE - An ionic thermal dissipation device includes an ionic wind generating system and a power system to drive the ionic wind generating system. The power system first converts external direct current power signals into alternating current (AC) power signals, and boosts the AC power signals. The power system doubles voltage of the boosted AC power signals, and rectifies the boosted AC power signals to generate high voltage direct current power signals to drive the ionic wind generating system. The power system also detects current signals generated by ion excitation of the ionic wind generating system, and regulates the high voltage direct current power signals according to the detected current signals. | 10-20-2011 |
20110308769 | IONIC THERMAL DISSIPATION DEVICE - An ionic thermal dissipation device includes an ionic wind generation system and a power system. The power system first converts external direct current (DC) power signals into first alternating current (AC) power signals, and boosts, increases voltage, and rectifies the first AC power signals to generate high voltage DC power signals to drive the ionic wind generation system. The power system also detects current signals generated by ion excitation of the ionic wind generation system and voltage signals of the high voltage DC power signals, and regulates the high voltage DC power signals and time of driving the ionic wind generation system according to a first PWM signal and a first analog signal from an electronic device and the detected current signals and voltage signals. | 12-22-2011 |
20120055529 | JUNCTION BOX - A junction box connected to a plurality of solar cell panels connected in series and under control a control device, includes a plurality of diodes, two ports, a switch, and a communication module. The plurality of diodes is forwardly connected in series to form a diode string with two ends, and each of the plurality of diodes is electrically connected to a corresponding one of the plurality of solar cell panels in parallel. The two ports are respectively connected to the two ends of the diode string and the plurality of solar cell panels, and output DC power of the plurality of solar cell panels. The switch is connected between the diode string and the two ports. The communication module is connected to the switch, and receives control signals from the control device to turn on or off the switch to control output of the DC power of the solar cell panels from the two ports. | 03-08-2012 |
20120055530 | JUNCTION BOX AND SOLAR POWER SYSTEM - A solar power system includes a plurality of photovoltaic (PV) modules and a control device. Each PV module includes a plurality of solar cell panels connected in series and a junction box. The junction box detects parameters of the corresponding PV module, generates a reporting signal, and transmits the reporting signal to the control device. The control device receives the reporting signals from the plurality of PV modules, compares a stored amount of the plurality of PV modules with an amount of the received reporting signals to determine if the plurality of PV modules are abnormal, and generates a state indication signal according to the determination. The control device further transmits the state indication signal to corresponding junction boxes according to identifications of the corresponding PV modules in the received reporting signals to make the corresponding junction boxes indicate states accordingly. | 03-08-2012 |
20120218243 | POWER SUPPLY SYSTEM AND DISPLAY DEVICE USING THE SAME - A power supply system for a display device includes a switch circuit, a transformer and an output filter circuit connected in series, and a controller connected to the switch circuit. The power supply system also comprises a transforming circuit and a superposition circuit. The transforming circuit adjusts amplitude of scanning signals generated by a scanning circuit to generate adjusted scanning signals. The superposition circuit samples high voltage output power signals output by the output filter circuit, superposes the sampled high voltage output power signals and the adjusted scanning signals together to generate a superposition signal, and sends the superposition signal to the controller. | 08-30-2012 |
20120236604 | FLYBACK CONVERTER WITH LEADING EDGE BLANKING MECHANISM - A flyback converter having a leading edge blanking (LEB) element keeps detecting whether or not primary-side current of the flyback converter reaches a predetermined threshold, beyond which the flyback converter could be damaged, in a predetermined LEB time corresponding to a leading edge of primary-side current. The flyback converter is turned off when the primary-side current exceeds the predetermined threshold. | 09-20-2012 |
20120243262 | POWER SUPPLY SYSTEM - A power supply system includes an electromagnetic interference (EMI) filter circuit, a rectifier and filter circuit, a switch circuit, a transformer, a feedback circuit and a controller. The feedback circuit includes a voltage divider circuit, a filter circuit, and a voltage and temperature compensation circuit. The voltage divider circuit generates a voltage dividing signal, and includes a first lossless element and a second lossless element connected in series between an output of the transformer and the ground, and the voltage dividing signal is generated at a node of the first and second lossless elements. The filter circuit filters the voltage dividing signal into a direct current (DC) signal. The voltage and temperature compensation circuit does voltage compensation and temperature compensation to the DC signal to generate a feedback signal, and sends the feedback signal to the controller. | 09-27-2012 |
20130016474 | HEAT DISSIPATING ASSEMBLY OF PHOTOVOLTAIC JUNCTION BOXAANM GER; CHIH-CHANAACI Jhongli CityAACO TWAAGP GER; CHIH-CHAN Jhongli City TWAANM LIAO; YU-HSIANGAACI Jhongli CityAACO TWAAGP LIAO; YU-HSIANG Jhongli City TWAANM CHEN; SHANG-TINGAACI Jhongli CityAACO TWAAGP CHEN; SHANG-TING Jhongli City TWAANM HUNG; TSUNG-LIANGAACI Jhongli CityAACO TWAAGP HUNG; TSUNG-LIANG Jhongli City TW - A photovoltaic junction box includes a housing, a circuit board received in the housing, a plurality of metal brackets, and a plurality of bypass diodes. The plurality of metal brackets are secured to the circuit board. The plurality of bypass diodes are respectively secured to the plurality of metal brackets and electrically connected to the circuit board. | 01-17-2013 |