Patents by Inventor Huai Zhu
Huai Zhu 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: 7894217Abstract: An exemplary direct current (DC) to DC converter includes a first rectifying and filtering circuit configured to receive an alternating current (AC) voltage and transform the AC voltage to a first DC voltage, a pulse width modulation (PWM) circuit, a first transformer configured to receive the first DC voltage and transform the first DC voltage to a second AC voltage under control of the PWM circuit, and a second rectifying and filtering circuit including a first transistor and a control circuit for switching on or switching off the first transistor so as to transform the second AC voltage to a second DC voltage.Type: GrantFiled: September 2, 2008Date of Patent: February 22, 2011Assignees: Innocom Technology (Shenzhen) Co., Ltd., Chimel Innolux CorporationInventors: Huai-Zhu Yan, Tong Zhou
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Patent number: 7839021Abstract: An exemplary multiplexed direct current regulation output circuit (2) includes a feedback circuit (22), a sampling circuit (30), a power control chip (21), a first output (27), a second output (28), a first half wave rectifier circuit (23), a second half wave rectifier circuit (24), a first filter circuit (25), a second filter circuit (26), a transformer (20), and a balance control circuit (29). The transformer is configured to provide low voltages to the first output via the first half wave rectifier circuit and the first filter circuit in series, and provide high voltages to the second output via the second half wave rectifier circuit and the second filter circuit in series. The balance control circuit is configured to control a voltage at the second output.Type: GrantFiled: January 28, 2008Date of Patent: November 23, 2010Assignees: Innocom Technology (Shenzhen) Co., Ltd., Chimei Innolux CorporationInventors: Tong Zhou, Kun Le, Huai-Zhu Yan
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Patent number: 7773391Abstract: An exemplary DC to DC converter (200) includes a first DC input (210) connected to a first DC power supply; a second DC input (220) connected to a second DC power supply; a transformer (230) including a primary winding (231), a sub-primary winding (232), and a secondary winding (233) for outputting a AC voltage; a pulse reverse circuit (260) including an input for receiving a square pulse and an output for providing the reverse square pulse; a first switch transistor (240) including a source connected to ground, a drain connected to the first DC input via the primary winding, and a gate connected to the output of the pulse reverse circuit; a second switch transistor (250) including a source connected to ground, a drain connected to ground via the sub-primary winding and a capacitor in series, and a gate connected to the output of the pulse reverse circuit.Type: GrantFiled: July 2, 2007Date of Patent: August 10, 2010Assignees: Innocom Technology (Shenzhen) Co., Ltd., Innolux Display Corp.Inventors: Huai-Zhu Yan, Tong Zhou
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Patent number: 7755915Abstract: An exemplary power supply circuit (20) includes a first commutating and filter circuit (21), a transformer (24), a second commutating and filter circuit (25), a transistor (27), a pulse width modulation circuit (26) outputting a control signal to control operation state of the transistor, and a feedback circuit (29). An external alternating current voltage is converted into a direct current with a cooperation operating of the transistor, the first commutating and filter circuit, the transformer, and the second commutating and filter circuit. The feedback circuit feeds an operating state of the transformer back to the pulse width modulation circuit, and the pulse width modulation circuit outputs corresponding control signals to turn on or turn off the transistor.Type: GrantFiled: December 3, 2007Date of Patent: July 13, 2010Assignees: Innocom Technology (ShenZhen) Co., Ltd., Innolux Display Corp.Inventors: Huai-Zhu Yan, Tong Zhou, Hong-Bo Zhou, Kun Le
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Publication number: 20090059624Abstract: An exemplary direction current (DC) to DC converter includes a first rectifying and filtering circuit configured to receive an alternating current (AC) voltage and transform the AC voltage to a first DC voltage, a pulse width modulation (PWM) circuit, a first transformer configured to receive the first DC voltage and transform the first DC voltage to a second AC voltage under control of the PWM circuit, and a second rectifying and filtering circuit including a first transistor and a control circuit for switching on or switching off the first transistor so as to transform the second AC voltage to a second DC voltage.Type: ApplicationFiled: September 2, 2008Publication date: March 5, 2009Inventors: Huai-Zhu Yan, Tong Zhou
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Publication number: 20080252281Abstract: An exemplary switching power supply circuit includes at least a power input terminal, a power control chip, and a soft start circuit. The power input terminal is configured for receiving an operating voltage applied to the switching power supply circuit, and the power control chip is configured for modulating a pulse width of an output current of an optical coupler in the soft start circuit to gain a pulse width voltage of the switching power supply circuit. The soft start circuit includes a first resistor, a second resistor, a capacitor, and a transistor performing an amplifying function.Type: ApplicationFiled: October 1, 2007Publication date: October 16, 2008Inventors: Huai-Zhu Yan, Tong Zhou
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Publication number: 20080211312Abstract: An exemplary multiplexed direct current regulation output circuit (2) includes a feedback circuit (22), a sampling circuit (30), a power control chip (21), a first output (27), a second output (28), a first half wave rectifier circuit (23), a second half wave rectifier circuit (24), a first filter circuit (25), a second filter circuit (26), a transformer (20), and a balance control circuit (29). The transformer is configured to provide low voltages to the first output via the first half wave rectifier circuit and the first filter circuit in series, and provide high voltages to the second output via the second half wave rectifier circuit and the second filter circuit in series. The balance control circuit is configured to control a voltage at the second output.Type: ApplicationFiled: January 28, 2008Publication date: September 4, 2008Inventors: Tong Zhou, Kun Le, Huai-Zhu Yan
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Publication number: 20080130327Abstract: An exemplary power supply circuit (20) includes a first commutating and filter circuit (21), a transformer (24), a second commutating and filter circuit (25), a transistor (27), a pulse width modulation circuit (26) outputting a control signal to control operation state of the transistor, and a feedback circuit (29). An external alternating current voltage is converted into a direct current with a cooperation operating of the transistor, the first commutating and filter circuit, the transformer, and the second commutating and filter circuit. The feedback circuit feeds an operating state of the transformer back to the pulse width modulation circuit, and the pulse width modulation circuit outputs corresponding control signals to turn on or turn off the transistor.Type: ApplicationFiled: December 3, 2007Publication date: June 5, 2008Inventors: Huai-Zhu Yan, Tong Zhou, Hong-Bo Zhou, Kun Le
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Publication number: 20080117654Abstract: An exemplary multi-output switching power supply (2) includes: a switching power supply controller (21) for generating a pulse signal; a transformer device (20) for providing a first AC voltage and a second AC voltage according to the pulse signal; a first regulation circuit (23, 25) for transforming the first AC voltage into a first DC voltage; a second regulation circuit (24, 26) for transforming the second AC voltage into a second DC voltage; a first output (27) and a second output (28) for respectively providing the first DC voltage and second DC voltage to a heavy load and a light load; a sampling circuit and a feedback circuit configured for generating a feedback signal according to the first DC voltage and the second DC voltage and providing the feedback signal to the switching power supply controller, and a voltage limiting circuit (29) connected between the first and second outputs.Type: ApplicationFiled: November 21, 2007Publication date: May 22, 2008Inventors: Huai-Zhu Yan, Tong Zhou
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Publication number: 20080111807Abstract: An exemplary multi-output switching power supply (2) includes a switching power supply controller (21) for generating a pulse signal; a transformer device (20) for providing a first and a second AC voltages according to the pulse signal; a first half wave rectifier (23) and a first filter circuit (25) connected in series for transforming the first AC voltage to a first DC voltage; a second half wave rectifier (24) and a second filter circuit (26) connected in series for transforming the second AC voltage to a second DC voltage; a first output (27) for providing the first DC voltage to a first load circuit (210); a feedback circuit configured for generating a feedback signal according to the first DC voltage and the second DC voltage, and providing the feedback signal to the switching power supply controller; and a voltage limiting circuit (29) connected between the first output and ground.Type: ApplicationFiled: November 13, 2007Publication date: May 15, 2008Inventors: Huai-Zhu Yan, Tong Zhou
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Patent number: 7372218Abstract: An open protection circuit (300) for a backlight module includes a PWM (350) with a control port (351) to disable the PWM. A switch (371) has a gate and a source connected to the control port. A plurality of first input circuits (330) includes first diodes (331), each of which has a first positive terminal connected to the gate and a negative terminal connected to ground. A plurality of second input circuits (340) include input resistors (341) connected to the control port. A plurality of detecting circuits (310, 380) are connected to the fluorescent lamps (311) and the first and second input circuits respectively. Each detecting circuit includes a sampling resistor (313) connected to one of the negative terminals of the first diodes, thereby the control port of the PWM is pulled low when either one of the fluorescent lamps are open-circuit.Type: GrantFiled: November 27, 2006Date of Patent: May 13, 2008Assignees: Innocom Technology (Shenzhen) Co., Ltd., Innolux Display Corp.Inventors: Tong Zhou, Huai-Zhu Yan, Kun Le
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Publication number: 20080002437Abstract: An exemplary DC to DC converter (200) includes a first DC input (210) connected to a first DC power supply; a second DC input (220) connected to a second DC power supply; a transformer (230) including a primary winding (231), a sub-primary winding (232), and a secondary winding (233) for outputting a AC voltage; a pulse reverse circuit (260) including an input for receiving a square pulse and an output for providing the reverse square pulse; a first switch transistor (240) including a source connected to ground, a drain connected to the first DC input via the primary winding, and a gate connected to the output of the pulse reverse circuit; a second switch transistor (250) including a source connected to ground, a drain connected to ground via the sub-primary winding and a capacitor in series, and a gate connected to the output of the pulse reverse circuit.Type: ApplicationFiled: July 2, 2007Publication date: January 3, 2008Inventors: Huai-Zhu Yan, Tong Zhou
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Publication number: 20070120503Abstract: An open protection circuit (300) for a backlight module includes a PWM (350) with a control port (351) to disable the PWM. A switch (371) has a gate and a source connected to the control port. A plurality of first input circuits (330) includes first diodes (331), each of which has a first positive terminal connected to the gate and a negative terminal connected to ground. A plurality of second input circuits (340) include input resistors (341) connected to the control port. A plurality of detecting circuits (310, 380) are connected to the fluorescent lamps (311) and the first and second input circuits respectively. Each detecting circuit includes a sampling resistor (313) connected to one of the negative terminals of the first diodes, thereby the control port of the PWM is pulled low when either one of the fluorescent lamps are open-circuit.Type: ApplicationFiled: November 27, 2006Publication date: May 31, 2007Inventors: Tong Zhou, Huai-Zhu Yan, Kun Le
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Publication number: 20040241427Abstract: A method of producing metal oxide nanoparticles in an exfoliated silicate framework by forming an aqueous exfoliated silicate suspension by mixing a layered clay into water until clear. To which is added an acidic hydrated metal species precursor solution, formed by dissolving one or more transitional metal salts, and a non-ionic surfactant. This solution is then aged to precipitate a product precursor before the product precursor is separated and washed. The product precursor is calcined to form metal oxide nanoparticles in an exfoliated silicate framework.Type: ApplicationFiled: June 15, 2004Publication date: December 2, 2004Inventors: Huai Zhu, Gao Qing Lu