Patents by Inventor Ren-Jun Xiao
Ren-Jun Xiao 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: 8242749Abstract: A battery testing apparatus includes a charge circuit, a discharge circuit, a computer, and a control circuit. The charge circuit is coupled to a direct current (DC) adapter, the DC adapter charges a battery through the charge circuit. The discharge circuit is coupled to the battery and configured to discharge the battery. The computer records charge/discharge time and charge/discharge cycles of the battery, and calculates capacity and cycle life of the battery according to the time and cycles of charge and discharge. The control circuit has an input terminal coupled to the computer, and a plurality of output terminals respectively coupled to the charge circuit and the discharge circuit, the control circuit controls the charge and discharge circuits charging and discharging the battery.Type: GrantFiled: December 28, 2007Date of Patent: August 14, 2012Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Ren-Jun Xiao, Xiao-Lin Gan, Yu-Kuang Ho
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Patent number: 7930579Abstract: A voltage test circuit for testing a computer power supply includes a voltage input unit configured for receiving voltages from the computer power supply, a voltage output unit configured for outputting the voltages to a plurality of electrical loads, a test unit, a switch control unit, and a capacitive load module. The test unit is connected between the voltage input unit and the voltage output unit for testing output ripple and noise of the voltages. The capacitive load module includes a plurality of capacitive loads. The switch control unit is connected between the voltage input unit and the capacitive module for selecting a suitable capacitive load according to the computer power supply.Type: GrantFiled: October 10, 2007Date of Patent: April 19, 2011Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Zhi-Sheng Yuan, Ren-Jun Xiao, Xiao-Lin Gan, Yu-Kuang Ho
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Patent number: 7817445Abstract: A power supply for a computer includes a transformer, a rectifier, a pulse width modulation (PWM) controller, a relay, a power switch, and a battery. The PWM controller includes a voltage terminal and a pulse terminal. The relay includes a switch and an inductance coil. An alternating current (AC) power supply is connected to a primary inductance coil of the transformer via the rectifier. A secondary inductance coil of the transformer provides a standby voltage. A positive voltage terminal of the rectifier is connected to the pulse terminal of the PWM controller via the primary inductance coil of the transformer. The switch is connected between the positive voltage terminal of the rectifier and the voltage terminal of the PWM controller. The inductance coil and the power switch are connected in series between the battery and ground. The power switch is controlled by powering on or off the computer.Type: GrantFiled: December 29, 2007Date of Patent: October 19, 2010Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Yi-Cai Tan, Ren-Jun Xiao, Zhi-Sheng Yuan
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Patent number: 7570073Abstract: A system for testing power supply performance is provided. The system includes a power supply having a plurality of outputs for outputting voltages, a plurality of display units corresponding to the plurality of outputs, for reflecting performance of the power supply, a plurality of resistance-matching selectors corresponding to the plurality of outputs, for supplying selective resistance, a voltage adjustable direct current source, and a selective switch. The display units are connected between first terminals of the outputs and the resistance-matching selectors, respectively. The resistance-matching selectors are in turn connected to ground. The voltage adjustable direct current source has a pole selectively connected to a second terminal of one of the outputs via the selective switch, and another pole grounded.Type: GrantFiled: August 6, 2007Date of Patent: August 4, 2009Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Ren-Jun Xiao, Xiao-Lin Gan, Yu-Kuang Ho
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Publication number: 20090161397Abstract: A power supply for a computer includes a transformer, a rectifier, a pulse width modulation (PWM) controller, a relay, a power switch, and a battery. The PWM controller includes a voltage terminal and a pulse terminal. The relay includes a switch and an inductance coil. An alternating current (AC) power supply is connected to a primary inductance coil of the transformer via the rectifier. A secondary inductance coil of the transformer provides a standby voltage. A positive voltage terminal of the rectifier is connected to the pulse terminal of the PWM controller via the primary inductance coil of the transformer. The switch is connected between the positive voltage terminal of the rectifier and the voltage terminal of the PWM controller. The inductance coil and the power switch are connected in series between the battery and ground. The power switch is controlled by powering on or off the computer.Type: ApplicationFiled: December 29, 2007Publication date: June 25, 2009Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.Inventors: YI-CAI TAN, REN-JUN XIAO, ZHI-SHENG YUAN
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Publication number: 20090001934Abstract: A battery testing apparatus includes a charge circuit, a discharge circuit, a computer, and a control circuit. The charge circuit is coupled to a direct current (DC) adapter, the DC adapter charges a battery through the charge circuit. The discharge circuit is coupled to the battery and configured to discharge the battery. The computer records charge/discharge time and charge/discharge cycles of the battery, and calculates capacity and cycle life of the battery according to the time and cycles of charge and discharge. The control circuit has an input terminal coupled to the computer, and a plurality of output terminals respectively coupled to the charge circuit and the discharge circuit, the control circuit controls the charge and discharge circuits charging and discharging the battery.Type: ApplicationFiled: December 28, 2007Publication date: January 1, 2009Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.Inventors: REN-JUN XIAO, XIAO-LIN GAN, YU-KUANG HO
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Patent number: 7446541Abstract: A solenoid test device includes a clock circuit, a control circuit, and an output port configured for coupling to two ends of a solenoid. The clock circuit generates a clock signal and sends it to the control circuit. The control circuit periodically and alternately couples one of the two ends of the solenoid to ground via the output port under the control of the clock signal. The solenoid test device is used to generate a periodic control signal to test service life and stability of solenoids.Type: GrantFiled: October 17, 2006Date of Patent: November 4, 2008Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Ren-Jun Xiao, Xiao-Lin Gan, Yu-Kuang Ho
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Patent number: 7430123Abstract: A rack for mounting modules of a computer system to be tested includes a chassis including a bracing frame for mounting test components of the computer system, and a top panel attached to the chassis, the top panel includes a braces member, receiving a module for testing, the module is electronically connected to the test components.Type: GrantFiled: September 27, 2006Date of Patent: September 30, 2008Assignees: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Ren-Jun Xiao, Xiao-Lin Gan
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Patent number: 7403021Abstract: A testing circuit for an interface includes a load feeding circuit and a voltage testing circuit. The load feeding circuit includes a resistance-regulating unit, a first comparator, a pass element, and a capacitor. The resistance-regulating unit is connected to a positive input of the first comparator. A negative input of the first comparator is connected to the capacitor and a first terminal of the pass element. An output of the first comparator is connected to a second terminal of the pass element. A third terminal of the pass element is connected to the interface. The voltage testing circuit includes a second comparator and a display member connected to the second comparator. The voltage of the interface and a reference voltage are input to inputs of the second comparator, and the second comparator outputs a signal to control the display member to display a comparison result.Type: GrantFiled: September 11, 2006Date of Patent: July 22, 2008Assignees: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Yi-Cai Tan, Ren-Jun Xiao, Kun-Lung Wu
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Publication number: 20080122477Abstract: A voltage test circuit for testing a computer power supply includes a voltage input unit configured for receiving voltages from the computer power supply, a voltage output unit configured for outputting the voltages to a plurality of electrical loads, a test unit, a switch control unit, and a capacitive load module. The test unit is connected between the voltage input unit and the voltage output unit for testing output ripple and noise of the voltages. The capacitive load module includes a plurality of capacitive loads. The switch control unit is connected between the voltage input unit and the capacitive module for selecting a suitable capacitive load according to the computer power supply.Type: ApplicationFiled: October 10, 2007Publication date: May 29, 2008Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: ZHI-SHENG YUAN, REN-JUN XIAO, XIAO-LIN GAN, YU-KUANG HO
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Publication number: 20080061797Abstract: A system for testing power supply performance is provided. The system includes a power supply having a plurality of outputs for outputting voltages, a plurality of display units corresponding to the plurality of outputs, for reflecting performance of the power supply, a plurality of resistance-matching selectors corresponding to the plurality of outputs, for supplying selective resistance, a voltage adjustable direct current source, and a selective switch. The display units are connected between first terminals of the outputs and the resistance-matching selectors, respectively. The resistance-matching selectors are in turn connected to ground. The voltage adjustable direct current source has a pole selectively connected to a second terminal of one of the outputs via the selective switch, and another pole grounded.Type: ApplicationFiled: August 6, 2007Publication date: March 13, 2008Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.Inventors: REN-JUN XIAO, XIAO-LIN GAN, YU-KUANG HO
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Publication number: 20080007270Abstract: A solenoid test device includes a clock circuit, a control circuit, and an output port configured for coupling to two ends of a solenoid. The clock circuit generates a clock signal and sends it to the control circuit. The control circuit periodically and alternately couples one of the two ends of the solenoid to ground via the output port under the control of the clock signal. The solenoid test device is used to generate a periodic control signal to test service life and stability of solenoids.Type: ApplicationFiled: October 17, 2006Publication date: January 10, 2008Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Ren-Jun Xiao, Xiao-Lin Gan, Yu-Kuang Ho
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Publication number: 20070118322Abstract: A testing circuit for an interface includes a load feeding circuit and a voltage testing circuit. The load feeding circuit includes a resistance-regulating unit, a first comparator, a pass element, and a capacitor. The resistance-regulating unit is connected to a positive input of the first comparator. A negative input of the first comparator is connected to the capacitor and a first terminal of the pass element. An output of the first comparator is connected to a second terminal of the pass element. A third terminal of the pass element is connected to the interface. The voltage testing circuit includes a second comparator and a display member connected to the second comparator. The voltage of the interface and a reference voltage are input to inputs of the second comparator, and the second comparator outputs a signal to control the display member to display a comparison result.Type: ApplicationFiled: September 11, 2006Publication date: May 24, 2007Applicant: HON HAI Precision Industry CO., LTD.Inventors: Yi-Cai Tan, Ren-Jun Xiao, Kun-Lung Wu
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Publication number: 20070109752Abstract: A rack for mounting modules of a computer system to be tested includes a chassis including a bracing frame for mounting test components of the computer system, and a top panel attached to the chassis, the top panel includes a braces member, receiving a module for testing, the module is electronically connected to the test components.Type: ApplicationFiled: September 27, 2006Publication date: May 17, 2007Applicant: HON HAI Precision Industry CO., LTD.Inventors: Ren-Jun Xiao, Xiao-Lin Gan
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Patent number: 7112988Abstract: A system of simulating resistive loads adapted for testing working characteristics of power supplies includes a power supply (100), a linking apparatus (10) and a resistance loading apparatus (40). The power supply has a plurality of outputs (120). The linking apparatus is electrically connected to the outputs of the power supply. The resistive load apparatus is electrically connected to the linking apparatus. The resistive load apparatus includes a plurality of resistance matching selectors.Type: GrantFiled: August 16, 2005Date of Patent: September 26, 2006Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Ren-Jun Xiao
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Publication number: 20060044005Abstract: A system of simulating resistive loads adapted for testing working characteristics of power supplies includes a power supply (100), a linking apparatus (10) and a resistance loading apparatus (40). The power supply has a plurality of outputs (120). The linking apparatus is electrically connected to the outputs of the power supply. The resistive load apparatus is electrically connected to the linking apparatus. The resistive load apparatus includes a plurality of resistance matching selectors.Type: ApplicationFiled: August 16, 2005Publication date: March 2, 2006Applicant: HON HAI Precision Industry CO., LTD.Inventor: Ren-Jun Xiao