Patents by Inventor Hsien-Chang Chiu
Hsien-Chang Chiu 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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Publication number: 20240175690Abstract: A magnet-guiding switching system includes a lane magnetic field device, a switching controlling module and a route controlling center. As the switching controlling unit informs the magnetic field switching unit to turn on the first switching electromagnets and to turn off the second switching electromagnets according to the driving signal, the vehicle is guided by magnetic fields of the first switching electromagnets to drive from the first section of the first route to the second section along the guiding section; as the switching controlling unit informs the magnetic field switching unit to turn on the second switching electromagnets and to turn off the first switching electromagnets according to the driving signal, the vehicle is guided by magnetic fields of the second switching electromagnets to drive from the first section of the first route to the continuous section of the second route along the switching section.Type: ApplicationFiled: November 30, 2022Publication date: May 30, 2024Inventors: Hsien-Chang CHIU, Cheng-Hsien WANG
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Patent number: 8860351Abstract: A fan speed control circuit is provided. The circuit includes a sensor, a control chip, a first integrated circuit, an integrated operational amplifier, a second integrated circuit, and a feedback comparator. The sensor senses a temperature of an electronic component. The control chip outputs a PWM signal corresponding to the temperature to a fan. The first integrated circuit and the second integrated circuit respectively generate a first equivalent voltage and a second equivalent voltage. The integrated operational amplifier amplifies the first equivalent voltage to generate an upper limit voltage and reduces the first equivalent voltage to generate a lower limit voltage. The feedback comparator compares the second equivalent voltage with the upper limit voltage and the lower limit voltage to generate a comparison value. The control chip adjusts the duty cycle of the PWM signal according to the comparison value, and outputs the adjusted PWM signal to the fan.Type: GrantFiled: November 14, 2012Date of Patent: October 14, 2014Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Hsien-Chang Chiu
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Publication number: 20140070749Abstract: A fan speed control circuit is provided. The circuit includes a sensor, a control chip, a first integrated circuit, an integrated operational amplifier, a second integrated circuit, and a feedback comparator. The sensor senses a temperature of an electronic component. The control chip outputs a PWM signal corresponding to the temperature to a fan. The first integrated circuit and the second integrated circuit respectively generate a first equivalent voltage and a second equivalent voltage. The integrated operational amplifier amplifies the first equivalent voltage to generate an upper limit voltage and reduces the first equivalent voltage to generate a lower limit voltage. The feedback comparator compares the second equivalent voltage with the upper limit voltage and the lower limit voltage to generate a comparison value. The control chip adjusts the duty cycle of the PWM signal according to the comparison value, and outputs the adjusted PWM signal to the fan.Type: ApplicationFiled: November 14, 2012Publication date: March 13, 2014Inventor: HSIEN-CHANG CHIU
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Patent number: 8483913Abstract: The present invention discloses a self-calibration method for an electric power steering system, which can self-calibrate the sensors to a normalized state to prevent from signal distortion, whereby to maintain stable steering sense of the driver and promote robustness and performance of the EPS system. The self-calibration method includes a signal offset compensation tactic and a zero-point signal self-calibration tactic. The present invention determines whether to undertake self-calibration according to judgement tactics, including a sensor power supply judgement tactic, a sensor correctness judgement tactic, and a self-calibration triggering condition. The self-calibration method can increase the correctness of sensors, maintain the original steering-assisting function and promote robustness of the EPS system.Type: GrantFiled: March 1, 2011Date of Patent: July 9, 2013Assignee: Automotive Research & Test CenterInventors: Jin-Yan Hsu, Chih-Jung Yeh, Tsung-Hsien Hu, Hsien-Chang Chiu
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Patent number: 8461792Abstract: A pulse width modulation (PWM) fan controller includes a sensor, a generator, a selector, and a multiplexer. The sensor is configured for sensing a current temperature of an electronic device. The generator is configured for generating different PWM signals, each of which is suitable for regulating the rotational speed of a fan for dissipating heat for the electronic device of a corresponding temperature. The selector is configured for generating a selection control signal based upon the current temperature of the electronic device. The selection control signal is used for selecting a PWM signal corresponding to the current temperature of the electronic device from the PWM signals from the generator. The multiplexer is configured for performing the selection of the PWM signal.Type: GrantFiled: May 13, 2011Date of Patent: June 11, 2013Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Chien-Jen Huang, Hsien-Chang Chiu
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Publication number: 20120223666Abstract: A pulse width modulation (PWM) fan controller includes a sensor, a generator, a selector, and a multiplexer. The sensor is configured for sensing a current temperature of an electronic device. The generator is configured for generating different PWM signals, each of which is suitable for regulating the rotational speed of a fan for dissipating heat for the electronic device of a corresponding temperature. The selector is configured for generating a selection control signal based upon the current temperature of the electronic device. The selection control signal is used for selecting a PWM signal corresponding to the current temperature of the electronic device from the PWM signals from the generator. The multiplexer is configured for performing the selection of the PWM signal.Type: ApplicationFiled: May 13, 2011Publication date: September 6, 2012Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: CHIEN-JEN HUANG, HSIEN-CHANG CHIU
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Publication number: 20120173081Abstract: The present invention discloses a self-calibration method for an electric power steering system, which can self-calibrate the sensors to a normalized state to prevent from signal distortion, whereby to maintain stable steering sense of the driver and promote robustness and performance of the EPS system. The self-calibration method includes a signal offset compensation tactic and a zero-point signal self-calibration tactic. The present invention determines whether to undertake self-calibration according to judgement tactics, including a sensor power supply judgement tactic, a sensor correctness judgement tactic, and a self-calibration triggering condition. The self-calibration method can increase the correctness of sensors, maintain the original steering-assisting function and promote robustness of the EPS system.Type: ApplicationFiled: March 1, 2011Publication date: July 5, 2012Applicant: AUTOMOTIVE RESEARCH & TEST CENTERInventors: JIN-YAN HSU, CHIH-JUNG YEH, TSUNG-HSIEN HU, HSIEN-CHANG CHIU
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Patent number: 6402173Abstract: A gravity tricycle is driven by a power-saving drive device.Type: GrantFiled: January 22, 2001Date of Patent: June 11, 2002Inventor: Hsien-Chang Chiu