Patent application number | Description | Published |
20100127155 | SOLAR-POWERED WIRELESS COMMUNICATION MODULE WITH DAYLIGHT INTENSITY MEASUREMENT - The present invention relates to a solar-powered wireless communication module with daylight intensity measurement, which comprises: a solar cell module, capable of converting solar energy into electricity; a Microcontroller Unit (MCU), coupled to the solar cell module for detecting and outputting values regarding the voltage and the current of the electricity converted from the solar cell module; and a wireless communication unit, powered by the electricity from the solar cell module and coupled to the MCU for transmitting values outputted from the MCU to a control end. | 05-27-2010 |
20100277139 | CONSTANT POWER CONTROL APPARATUS AND CONTROL METHOD THEREOF - A constant power control apparatus and a controlling method thereof are provided. The constant power control apparatus outputs output power to a load element. The constant power control apparatus includes a compensation and modification device, a constant power control device, and a power generation circuit. The compensation and modification device receives an expected output power voltage and a voltage feedback signal relating to the output power. The compensation and modification device transforms the expected output power voltage into a current reference value, and modifies the current reference value to generate a modified current reference value according to the voltage feedback signal. The constant power control device receives the modified current reference value and a current feedback signal relating to the output power, and generates a control signal for use in power modulation. The power generation circuit receives the control signal and outputs the output power. | 11-04-2010 |
20120299507 | LIGHT SOURCE DRIVING DEVICE - A light source driving device configured to drive a light-emitting unit is provided. The light source driving device includes a direct voltage source, a first capacitance unit, and a switching current adjustment circuit. The direct voltage source is coupled with the light-emitting unit and supplies a direct voltage. The first capacitance unit and the light-emitting unit are connected in parallel. The switching current adjustment circuit and the light-emitting unit are connected in series. The switching current adjustment circuit is configured to bear a part of a voltage stress of the direct voltage source and is configured to switch the direct voltage. | 11-29-2012 |
20130082666 | BUCK POWER FACTOR CORRECTION SYSTEM - The invention disclosed buck power factor correction system. The system includes: a first storing device, for storing and discharging energy; a first converter device, coupled to the first storing device, for transferring and converting energy; a second storing device, coupled to the first storing device, for storing and discharging energy; and a second converter device, coupled to the second storing device, for transferring and converting energy. | 04-04-2013 |
20130169242 | ACTIVE BUCK POWER FACTOR CORRECTION DEVICE - The present disclose relates to a power active buck power factor correction device, comprising: a AC source; a rectifying device coupled to the AC source for receiving and rectifying the AC source so as to generate an input voltage; a first converting device coupled to the assistance device for receiving, transmitting, converting and storing energy; a load coupled to the first converting device; and an assistance device coupled to the first converting device for generating an assistance voltage. Specifically, the polarity of the assistance voltage is same with the input voltage, but is contrary to an output voltage, so that the first converting device may continue to work and receive an input current under the input voltage is smaller than the output voltage while the discontinue time of the input current is getting shorter so as to obtain the perfected power factor correction effect. | 07-04-2013 |
20140056046 | PASSIVE POWER FACTOR CORRECTION CIRCUIT, ELECTRONIC DEVICE APPLYING THE SAME AND OPERATION METHODS THEREOF - A passive power factor correction circuit includes: a DC capacitor and an input capacitor, coupled to a rectifying circuit and charged by a DC voltage from the rectifying circuit; an output capacitor, coupled to a load; first diode and a second diode, coupled to the input capacitor and the output capacitor; and an inductor, coupled to the load, the input capacitor and the output capacitor. Charging into and discharging from the DC capacitor are completed within a half cycle of an input AC voltage. | 02-27-2014 |
20140132231 | DC Conversion Circuit - A DC conversion circuit in the disclosure includes a buck-boost converter and a resonant stage circuit. The buck-boost converter has two input ends, a negative output end and a positive output end. The buck-boost converter receives a first DC signal via its two input ends, and outputs a second DC signal via its two output ends. The resonant stage circuit has two input ends and two output ends. The resonant stage circuit receives the second DC signal via its two input ends, converts the second DC signal into energy for power charging, and outputs the energy to a load via its two output ends. Then, the resonant stage circuit converts the energy, which is used for power charging, to form a negative voltage by a resonance effect, and outputs the energy to the load via its two output ends. | 05-15-2014 |
20140139128 | DIRECT CURRENT CONVERSION CIRCUIT - A direct current (DC) conversion circuit suitable for driving a load comprises a buck-boost converter, a resonant stage circuit and an output stage circuit. The buck-boost converter has two input ends receiving a first DC signal, and two output ends outputting a second DC signal. The resonant stage circuit has two input ends receiving the second DC signal. The resonant stage circuit converts the second DC signal to energy and further converts the energy to a negative voltage by a resonance effect. The resonant stage circuit has two input ends outputting the energy. The output stage circuit has two input ends receiving the energy to store the energy, and two output ends outputting energy to the load. | 05-22-2014 |
Patent application number | Description | Published |
20130043797 | Lighting Control Systems and Methods - Systems and methods for lighting control are disclosed. The system may include at least one lighting device providing illumination and a handheld unit coupled with the lighting device to control at least one of a controllable lighting state, a controllable lighting intensity, and a controllable lighting effect of the lighting device. The handheld unit may include an image-capturing device and a processor coupled with the image-capturing device. The processor may be configured to control the image-capturing device to capture an image of a space affected by the lighting device; analyze an luminance level of the space; receive a lighting parameter; and provide a command to the lighting device for controlling at least one of the controllable lighting state, the controllable lighting intensity, and the controllable lighting effect of the lighting device based on at least one of the image, the luminance level, and the lighting parameter. | 02-21-2013 |
20130162143 | LAMP CONTROL SYSTEM, LAMP POWER-SAVING SYSTEM AND METHOD THEREFOR - A power-saving method for a lamp power-saving system is provided. The method includes the following steps. A lamp control unit is provided to control a fluorescent lamp. The lamp control unit includes a power conversion circuit and a preheat and lighting circuit. The preheat and lighting circuit, coupled to the power conversion circuit and two terminals of the fluorescent lamp, preheats and activates the fluorescent lamp, and outputs a feedback signal indicating a current passing through the fluorescent lamp. When the feedback signal indicates the fluorescent lamp is in a preheat mode, a resonant circuit of the preheat and lighting circuit is enabled to preheat the fluorescent lamp via a current path provided by a diode bridge of the preheat and lighting circuit. When the feedback signal indicates the fluorescent lamp is lighted, the current path of the preheat and lighting circuit is disconnected to stop preheating. | 06-27-2013 |