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).
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Patent number: 8575852Abstract: 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: GrantFiled: June 24, 2011Date of Patent: November 5, 2013Assignee: Ampower Technology Co., Ltd.Inventors: Chih-Chan Ger, Yu-Hsiao Chao, Cheng-Ta Lin
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Patent number: 8450698Abstract: 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: GrantFiled: October 18, 2010Date of Patent: May 28, 2013Assignee: Ampower Technology Co., Ltd.Inventors: Tsung-Liang Hung, Chi-Hsiung Lee, Yu-Hsiao Chao, Nai-Chun Chang
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Patent number: 8446106Abstract: 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: GrantFiled: June 21, 2011Date of Patent: May 21, 2013Assignee: Ampower Technology Co., Ltd.Inventors: Chi-Hsiung Lee, Yu-Hsiao Chao
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Patent number: 8335090Abstract: 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: GrantFiled: December 30, 2009Date of Patent: December 18, 2012Assignee: Ampower Technology Co., Ltd.Inventors: Wei-Chi Huang, Tsung-Liang Hung, Yu-Hsiao Chao, Chi-Hsiung Lee
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Publication number: 20120256557Abstract: 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: ApplicationFiled: June 24, 2011Publication date: October 11, 2012Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: CHIH-CHAN GER, YU-HSIAO CHAO, CHENG-TA LIN
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Patent number: 8248749Abstract: 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: GrantFiled: August 27, 2010Date of Patent: August 21, 2012Assignee: Ampower Technology Co., Ltd.Inventors: Wei-Chi Huang, Chi-Hsiung Lee, Yu-Hsiao Chao, Tsung-Liang Hung
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Publication number: 20120139420Abstract: 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: ApplicationFiled: June 21, 2011Publication date: June 7, 2012Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: CHI-HSIUNG LEE, YU-HSIAO CHAO
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Publication number: 20120049083Abstract: 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: ApplicationFiled: October 18, 2010Publication date: March 1, 2012Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: TSUNG-LIANG HUNG, CHI-HSIUNG LEE, YU-HSIAO CHAO, NAI-CHUN CHANG
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Patent number: 8120271Abstract: 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: GrantFiled: October 22, 2009Date of Patent: February 21, 2012Assignee: Ampower Technology Co., Ltd.Inventors: Chi-Hsiung Lee, Yu-Hsiao Chao, Hung-Yi Chen
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Publication number: 20110308769Abstract: 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: ApplicationFiled: August 27, 2010Publication date: December 22, 2011Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: WEI-CHI HUANG, CHI-HSIUNG LEE, YU-HSIAO CHAO, TSUNG-LIANG HUNG
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Publication number: 20110253348Abstract: 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: ApplicationFiled: July 28, 2010Publication date: October 20, 2011Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: WEI-CHI HUANG, YU-HSIAO CHAO, TSUNG-LIANG HUNG, CHI-HSIUNG LEE, CHENG-TA LIN
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Patent number: 7986106Abstract: 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: GrantFiled: November 24, 2008Date of Patent: July 26, 2011Assignee: Ampower Technology Co., Ltd.Inventors: Hung-Yi Chen, Chi-Hsiung Lee, Yu-Hsiao Chao
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Publication number: 20110103114Abstract: 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: ApplicationFiled: December 30, 2009Publication date: May 5, 2011Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: WEI-CHI HUANG, TSUNG-LIANG HUNG, YU-HSIAO CHAO, CHI-HSIUNG LEE
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Publication number: 20100181928Abstract: 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: ApplicationFiled: October 22, 2009Publication date: July 22, 2010Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: CHI-HSIUNG LEE, YU-HSIAO CHAO, HUNG-YI CHEN
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Publication number: 20100019694Abstract: 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: ApplicationFiled: November 24, 2008Publication date: January 28, 2010Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: HUNG-YI CHEN, CHI-HSIUNG LEE, YU-HSIAO CHAO
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Publication number: 20090315472Abstract: 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: ApplicationFiled: April 2, 2009Publication date: December 24, 2009Applicant: AMPOWER TECHNOLOGY CO., LTD.Inventors: CHI-HSIUNG LEE, HUNG-CHANG LIANG, YU-HSIAO CHAO
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Patent number: 7425800Abstract: 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: GrantFiled: October 11, 2006Date of Patent: September 16, 2008Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Yu-Hsiao Chao, Tsang-Chuan Lin, Chi-Hsiung Lee
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Patent number: 7274158Abstract: 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: GrantFiled: December 20, 2005Date of Patent: September 25, 2007Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Chi-Hsiung Lee, Yu-Hsiao Chao, Che-Chen Fan Chiang, Cheng-Chueh Tsai, Shian-Nan Lin
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Publication number: 20070188108Abstract: 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: ApplicationFiled: October 11, 2006Publication date: August 16, 2007Applicant: HON HAI Precision Industry CO., LTD.Inventors: Yu-Hsiao Chao, Tsang-Chuan Lin, Chi-Hsiung Lee
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Publication number: 20070164690Abstract: 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: ApplicationFiled: October 26, 2006Publication date: July 19, 2007Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: YU-HSIAO CHAO, CHI-HSIUNG LEE