Patents by Inventor Yu-Hsiao Chao

Yu-Hsiao Chao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8575852
    Abstract: A multi-lamp driving system includes a power stage circuit, a pulse width modulation (PWM) controller, a plurality of transformer circuits, and an abnormal detection circuit. Each of the transformer circuits includes a first primary winding and a second primary winding connected in series and a first secondary winding and a second secondary winding respectively outputting AC power signals to drive at least one lamp. The abnormal detection circuit is connected to a junction of the first primary winding and the second primary winding of each of the transformer circuits, and determines if voltages of the junction of the first primary winding and the second primary winding of each of the transformer circuits are different to determine if the at least two lamps are normal. The abnormal detection circuit further generate control signals to control the PWM controller upon the condition that one of the at least two lamps are abnormal.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: November 5, 2013
    Assignee: Ampower Technology Co., Ltd.
    Inventors: Chih-Chan Ger, Yu-Hsiao Chao, Cheng-Ta Lin
  • Patent number: 8450698
    Abstract: An ion airflow generating device includes a number of generator stages, each of which includes a number of generators. Each generator includes a needle-shaped emitter and a ring-shaped receiver. The receivers in the same stage are arranged in an array. Each receiver defines a groove in an outer circumferential surface thereof along a direction parallel to the central axis thereof. Each two adjacent receivers in a former generator stage connect with each other, and the grooves thereof cooperatively define a hole for holding an emitter in a next generator stage. The receivers in the next generator stage symmetrically offset from the receivers in the former generator stage such that each emitter aligns to the center of a corresponding receiver.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: May 28, 2013
    Assignee: Ampower Technology Co., Ltd.
    Inventors: Tsung-Liang Hung, Chi-Hsiung Lee, Yu-Hsiao Chao, Nai-Chun Chang
  • Patent number: 8446106
    Abstract: A light emitting diode (LED) driving system comprises a plurality of current limitation circuits and a plurality of over-voltage protection circuits to driving a plurality of LED strings. Each of the current limitation circuits comprises a first switch comprising a control pole receiving a reference voltage, a first pole correspondingly connected to a LED string, and a second pole connected to the ground via a first resistor and a second switch comprising a control pole connected to the second pole of the first switch via a second resistor, a first pole receiving the reference voltage, and a second pole grounded. Each of the over-voltage protection circuits comprises a zener diode, a third switch and a first capacitor.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 21, 2013
    Assignee: Ampower Technology Co., Ltd.
    Inventors: Chi-Hsiung Lee, Yu-Hsiao Chao
  • Patent number: 8335090
    Abstract: 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.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: December 18, 2012
    Assignee: Ampower Technology Co., Ltd.
    Inventors: Wei-Chi Huang, Tsung-Liang Hung, Yu-Hsiao Chao, Chi-Hsiung Lee
  • Publication number: 20120256557
    Abstract: A multi-lamp driving system includes a power stage circuit, a pulse width modulation (PWM) controller, a plurality of transformer circuits, and an abnormal detection circuit. Each of the transformer circuits includes a first primary winding and a second primary winding connected in series and a first secondary winding and a second secondary winding respectively outputting AC power signals to drive at least one lamp. The abnormal detection circuit is connected to a junction of the first primary winding and the second primary winding of each of the transformer circuits, and determines if voltages of the junction of the first primary winding and the second primary winding of each of the transformer circuits are different to determine if the at least two lamps are normal. The abnormal detection circuit further generate control signals to control the PWM controller upon the condition that one of the at least two lamps are abnormal.
    Type: Application
    Filed: June 24, 2011
    Publication date: October 11, 2012
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: CHIH-CHAN GER, YU-HSIAO CHAO, CHENG-TA LIN
  • Patent number: 8248749
    Abstract: 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.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: August 21, 2012
    Assignee: Ampower Technology Co., Ltd.
    Inventors: Wei-Chi Huang, Chi-Hsiung Lee, Yu-Hsiao Chao, Tsung-Liang Hung
  • Publication number: 20120139420
    Abstract: A light emitting diode (LED) driving system comprises a plurality of current limitation circuits and a plurality of over-voltage protection circuits to driving a plurality of LED strings. Each of the current limitation circuits comprises a first switch comprising a control pole receiving a reference voltage, a first pole correspondingly connected to a LED string, and a second pole connected to the ground via a first resistor and a second switch comprising a control pole connected to the second pole of the first switch via a second resistor, a first pole receiving the reference voltage, and a second pole grounded. Each of the over-voltage protection circuits comprises a zener diode, a third switch and a first capacitor.
    Type: Application
    Filed: June 21, 2011
    Publication date: June 7, 2012
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: CHI-HSIUNG LEE, YU-HSIAO CHAO
  • Publication number: 20120049083
    Abstract: An ion airflow generating device includes a number of generator stages, each of which includes a number of generators. Each generator includes a needle-shaped emitter and a ring-shaped receiver. The receivers in the same stage are arranged in an array. Each receiver defines a groove in an outer circumferential surface thereof along a direction parallel to the central axis thereof. Each two adjacent receivers in a former generator stage connect with each other, and the grooves thereof cooperatively define a hole for holding an emitter in a next generator stage. The receivers in the next generator stage symmetrically offset from the receivers in the former generator stage such that each emitter aligns to the center of a corresponding receiver.
    Type: Application
    Filed: October 18, 2010
    Publication date: March 1, 2012
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: TSUNG-LIANG HUNG, CHI-HSIUNG LEE, YU-HSIAO CHAO, NAI-CHUN CHANG
  • Patent number: 8120271
    Abstract: A multi-lamp driving circuit for driving a plurality of lamp groups includes an inversion circuit configured to drive the plurality of lamp groups and a current balance circuit electrically connected between the inversion circuit and the plurality of lamp groups. The current balance circuit includes a plurality of transformers, each including a first magnetic loop composed of a first primary winding and a first secondary winding and a second magnetic loop composed of a second primary winding and a second secondary winding. Numbers of turns of the second primary winding and the second secondary winding of each of the plurality of transformers are equivalent, and numbers of turns of the first primary winding and the first secondary winding of each of the plurality of transformers are equivalent.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: February 21, 2012
    Assignee: Ampower Technology Co., Ltd.
    Inventors: Chi-Hsiung Lee, Yu-Hsiao Chao, Hung-Yi Chen
  • Publication number: 20110308769
    Abstract: 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.
    Type: Application
    Filed: August 27, 2010
    Publication date: December 22, 2011
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: WEI-CHI HUANG, CHI-HSIUNG LEE, YU-HSIAO CHAO, TSUNG-LIANG HUNG
  • Publication number: 20110253348
    Abstract: 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.
    Type: Application
    Filed: July 28, 2010
    Publication date: October 20, 2011
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: WEI-CHI HUANG, YU-HSIAO CHAO, TSUNG-LIANG HUNG, CHI-HSIUNG LEE, CHENG-TA LIN
  • Patent number: 7986106
    Abstract: A discharge lamp driving device includes a power stage circuit, a transformer circuit, a control circuit, a feedback circuit and a lamp protection circuit. The lamp protection circuit includes a current sensing circuit, a reference voltage selecting circuit, a comparing circuit and a protection signal generating circuit. The current sensing circuit senses current signals flowing through the lamps, and transforms the current signals to voltage signals. The reference voltage selecting circuit is connected to the current sensing circuit. The comparing circuit is connected to the current sensing circuit and the comparing circuit. The protection signal generating circuit is connected between the comparing circuit and the control circuit. The control circuit is connected to the comparing circuit.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: July 26, 2011
    Assignee: Ampower Technology Co., Ltd.
    Inventors: Hung-Yi Chen, Chi-Hsiung Lee, Yu-Hsiao Chao
  • Publication number: 20110103114
    Abstract: 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.
    Type: Application
    Filed: December 30, 2009
    Publication date: May 5, 2011
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: WEI-CHI HUANG, TSUNG-LIANG HUNG, YU-HSIAO CHAO, CHI-HSIUNG LEE
  • Publication number: 20100181928
    Abstract: A multi-lamp driving circuit for driving a plurality of lamp groups includes an inversion circuit configured to drive the plurality of lamp groups and a current balance circuit electrically connected between the inversion circuit and the plurality of lamp groups. The current balance circuit includes a plurality of transformers, each including a first magnetic loop composed of a first primary winding and a first secondary winding and a second magnetic loop composed of a second primary winding and a second secondary winding. Numbers of turns of the second primary winding and the second secondary winding of each of the plurality of transformers are equivalent, and numbers of turns of the first primary winding and the first secondary winding of each of the plurality of transformers are equivalent.
    Type: Application
    Filed: October 22, 2009
    Publication date: July 22, 2010
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: CHI-HSIUNG LEE, YU-HSIAO CHAO, HUNG-YI CHEN
  • Publication number: 20100019694
    Abstract: A discharge lamp driving device includes a power stage circuit, a transformer circuit, a control circuit, a feedback circuit and a lamp protection circuit. The lamp protection circuit includes a current sensing circuit, a reference voltage selecting circuit, a comparing circuit and a protection signal generating circuit. The current sensing circuit senses current signals flowing through the lamps, and transforms the current signals to voltage signals. The reference voltage selecting circuit is connected to the current sensing circuit. The comparing circuit is connected to the current sensing circuit and the comparing circuit. The protection signal generating circuit is connected between the comparing circuit and the control circuit. The control circuit is connected to the comparing circuit.
    Type: Application
    Filed: November 24, 2008
    Publication date: January 28, 2010
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: HUNG-YI CHEN, CHI-HSIUNG LEE, YU-HSIAO CHAO
  • Publication number: 20090315472
    Abstract: A backlight module positioned on a printed circuit board (PCB) includes a power control circuit, a transformer, and a voltage detection component. The power control circuit outputs power signals. The transformer has a primary winding and at least one secondary winding. The primary winding is connected to the power control circuit and receives the power signals. The voltage detection component is positioned on a high voltage terminal of the secondary winding of the transformer, detecting voltage variations in the high voltage terminal of the secondary winding of the transformer, and outputting the detected voltage variation to the power control circuit. The power control circuit adjusts the output power signals according to the detected voltage variation.
    Type: Application
    Filed: April 2, 2009
    Publication date: December 24, 2009
    Applicant: AMPOWER TECHNOLOGY CO., LTD.
    Inventors: CHI-HSIUNG LEE, HUNG-CHANG LIANG, YU-HSIAO CHAO
  • Patent number: 7425800
    Abstract: A driving device for driving a light source module (32) includes a switch circuit (30), a transformer circuit (31), a voltage sensing circuit (34), a current sensing circuit (35), and a PWM controller (33). The switch circuit converts a received direct current (DC) power signal to an alternating current (AC) signal. The transformer circuit converts the AC signal to an appropriate signal to drive the light source module. The voltage sensing circuit receives the DC power signal and senses a voltage level of the DC power signal. The current sensing circuit receives the DC power signal and senses a current level of the DC power signal. The PWM controller controls the AC signal output from the switch circuit according to the sensed voltage and current levels.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: September 16, 2008
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Yu-Hsiao Chao, Tsang-Chuan Lin, Chi-Hsiung Lee
  • Patent number: 7274158
    Abstract: A system for driving a lamp module (13) includes a converter (11), a driving circuit (12), and a pulse width modulation (PWM) controller (14). The lamp module includes a plurality of lamps. The converter converts a received voltage to a direct current (DC) voltage. The driving circuit converts the DC voltage to an alternating current (AC) voltage. The PWM controller is connected between the converter and the lamp module, for regulating the DC voltages outputted from the converter according to current flowing through the lamps of the lamp module. In one embodiment, the system includes a bus inverter controller. The bus inverter controller is connected between the driving circuit and the lamp module, for regulating a working frequency thereof and controlling the AC voltage outputted from the driving circuit when the lamps are turned on. The system has a reduced number of PWM controllers and a relatively low cost.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: September 25, 2007
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Chi-Hsiung Lee, Yu-Hsiao Chao, Che-Chen Fan Chiang, Cheng-Chueh Tsai, Shian-Nan Lin
  • Publication number: 20070188108
    Abstract: A driving device for driving a light source module (32) includes a switch circuit (30), a transformer circuit (31), a voltage sensing circuit (34), a current sensing circuit (35), and a PWM controller (33). The switch circuit converts a received direct current (DC) power signal to an alternating current (AC) signal. The transformer circuit converts the AC signal to an appropriate signal to drive the light source module. The voltage sensing circuit receives the DC power signal and senses a voltage level of the DC power signal. The current sensing circuit receives the DC power signal and senses a current level of the DC power signal. The PWM controller controls the AC signal output from the switch circuit according to the sensed voltage and current levels.
    Type: Application
    Filed: October 11, 2006
    Publication date: August 16, 2007
    Applicant: HON HAI Precision Industry CO., LTD.
    Inventors: Yu-Hsiao Chao, Tsang-Chuan Lin, Chi-Hsiung Lee
  • Publication number: 20070164690
    Abstract: A discharge lamp driving device, for driving a plurality of lamp modules (23), includes a plurality of power stage circuits (22), a plurality of driving circuits (24), a multi-phase controller (21), and a controller (25). The power stage circuits, respectively corresponding to the lamp modules, converts received direct current (DC) signals to alternating current (AC) signals to drive the corresponding lamp modules. The driving circuits, respectively connected to corresponding power stage circuits, output driving signals to control outputs of the corresponding power stage circuits. The multi-phase controller, connected to the driving circuits, controls timing of the driving circuits outputting the driving signals. The controller, connected to the driving circuits, controls duty cycles of the driving signals.
    Type: Application
    Filed: October 26, 2006
    Publication date: July 19, 2007
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: YU-HSIAO CHAO, CHI-HSIUNG LEE