Anwell Semiconductor Corp. Patent applications |
Patent application number | Title | Published |
20140333215 | MULTI-SEGMENT LED DRIVING CIRCUIT - Disclosed is a multi-segment LED driving circuit used in an AC operating mode for outputting a drive current to drive a plurality of serially connected LED strings. The LED driving circuit includes at least one detection part, at least one comparison part and at least one adjusting part. The detection part detects an input voltage and an output voltage at both ends of each string and its next string to form a detected value provided for the comparison part to compare the detected value with a reference value to turn on or off the adjusting part so as to control the strings through which the drive current passes and then sequentially drives the strings to emit light. The LED driving circuit can adjust the load of the circuit immediately based on the change of voltage value of the AC power to ensure the stability of the drive current. | 11-13-2014 |
20140292229 | ELECTROMAGNETIC COUPLING MULTI-OUTPUT CONTROL CIRCUIT - Disclosed is an electromagnetic coupling multi-output control circuit having a detection unit, a switching unit and a coupling unit, and the coupling unit is coupled to a side of a transformer of a power driving device to sense and produce a second driving voltage, such that the transformer has a multi-output function. The switching unit is provided for receiving and outputting the second driving voltage to a second driving load, and the detection unit is provided for detecting the second driving voltage to produce a detection value, so that the switching unit analyzes the detection value and switches outputting a frequency of the second driving voltage to stabilize the voltage value of the second driving voltage, so as to flexibly increase the number of output voltages of the power driving device while lowering the cost and expand the scope of applicability. | 10-02-2014 |
20140035474 | HIGH EFFICIENCY LED DRIVER CHIP AND DRIVER CIRCUIT THEREOF - Disclosed is a high-efficiency LED driver chip and a driver circuit of the chip, and the driver chip includes a detection unit, a comparison unit and a correction unit. The LED detection unit detects the operating current of the LED driver circuit by an external sensing resistor and an internal current mirror to output a setup signal, and the comparison unit detects the driving current of at least one LED by an external comparing resistor to output an initialization signal, so that the correction unit can output a correction signal according to the setup signal and the initialization signal to reduce the power loss of the circuit while maintaining the driving current constant, so as to improve the illumination quality and the service life of the LED. | 02-06-2014 |
20120212147 | Flyback Energy Converter - The present invention is to provide a flyback energy converter comprising a transformer having a primary winding, a secondary winding and an auxiliary winding, a load electrically connected with the secondary winding, a switch serially connected with the primary winding and a primary controlling circuit. The primary controlling circuit comprises a voltage measurement terminal and a switch controlling terminal. The voltage measurement terminal measures an output voltage wave provided from the auxiliary winding to get a part of times in the part of the output voltage wave, so as to enlarge the part of times to a total time. According to a predetermined timing transferred from the total time, the switch controlling terminal controls the switch. | 08-23-2012 |
20120081008 | CONTROL CIRCUIT MODULE OF LIGHT-EMITTING DIODE LAMP - The present invention relates to a control circuit module of light-emitting diode (LED) lamp, which comprises: a AC to DC element, for transferring mains AC power to DC power; a plurality of groups of LED; a plurality of switches, corresponding to the number of the groups of LED, for controlling to turn on/off the each group; a linear voltage regulator, for cutting the DC power from the AC to DC element to a plurality of voltage sections; a switch selector, for selecting to open/close the switches according to the voltage sections from the linear voltage regulator; a current selector, for capturing available current sections from the voltage sections of the linear voltage regulator; and a LED current setup device, for controlling the current sections to open/close the plurality of switches by a user according to the LED current setup device and the current selector. | 04-05-2012 |