Patents by Inventor Shu-Yuen Ron Hui
Shu-Yuen Ron Hui 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: 8294418Abstract: The present invention provides a power transfer device for charging a wireless communication device having a communication bandwidth, and an associated method of transferring power. The device and method of the invention use a spread-spectrum technique to reduce or minimize interference signals within the communication bandwidth and within the power transfer device.Type: GrantFiled: February 3, 2010Date of Patent: October 23, 2012Assignee: ConvenientPower, Ltd.Inventors: Shu Yuen Ron Hui, Quan Xue, Kwun Chiu Wan
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Patent number: 8269456Abstract: There is provided a planar inductive battery charging system designed to enable electronic devices to be recharged. The system includes a planar charging module having a charging surface on which a device to be recharged is placed. Within the charging module and parallel to the charging surface is at least one and preferably an array of primary windings that couple energy inductively to a secondary winding formed in the device to be recharged. The invention also provides secondary modules that allow the system to be used with conventional electronic devices not formed with secondary windings.Type: GrantFiled: November 19, 2010Date of Patent: September 18, 2012Assignee: City University of Hong KongInventor: Shu-yuen Ron Hui
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Publication number: 20120194126Abstract: There is provided a planar inductive battery charging system designed to enable electronic devices to be recharged. The system includes a planar charging module having a charging surface on which a device to be recharged is placed. Within the charging module and substantially parallel to the charging surface are multiple primary windings formed in a multi-layer structure that couple energy inductively to a secondary winding formed in the device to be recharged. A winding of a first layer is offset relative to a winding of a second layer. The invention also provides secondary modules that allow the system to be used with conventional electronic devices not formed with secondary windings.Type: ApplicationFiled: March 21, 2012Publication date: August 2, 2012Applicant: CITY UNIVERSITY OF HONG KONGInventor: Shu-yuen Ron HUI
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Publication number: 20120146525Abstract: This invention is concerned with the control and design of a passive or an active LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15,000 hours, the proposed system can be developed with robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. The proposed circuits can become dimmable systems if the AC input voltage can be adjusted by external means.Type: ApplicationFiled: August 20, 2010Publication date: June 14, 2012Applicant: CITY UNIVERSITY OF HONG KONGInventors: Shu Yuen Ron Hui, Wu Chen
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Publication number: 20120086394Abstract: There is provided a planar inductive battery charging system designed to enable electronic devices to be recharged. The system includes a planar charging module having a charging surface on which a device to be recharged is placed. Within the charging module and parallel to the charging surface is at least one and preferably an array of primary windings that couple energy inductively to a secondary winding formed in the device to be recharged. The invention also provides secondary modules that allow the system to be used with conventional electronic devices not formed with secondary windings.Type: ApplicationFiled: October 10, 2011Publication date: April 12, 2012Applicant: CITY UNIVERSITY OF HONG KONGInventor: Shu Yuen Ron HUI
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Publication number: 20120080420Abstract: The present invention provides a power control circuit connectable to a load adapted to receive a power supply, the power control circuit adapted to absorb power from the power supply and adapted to deliver power to the power supply to stabilize at least one electrical parameter of the power supply. The present invention also provides an associated method of stabilizing at least one electrical parameter of a power supply connectable to a load, the method including absorbing power from the power supply or delivering power to the power supply. The at least one electrical parameter of the power supply includes parameters such as voltage and frequency.Type: ApplicationFiled: October 3, 2011Publication date: April 5, 2012Applicants: VERSITECH LIMITED, CITY UNIVERSITY OF HONG KONGInventors: Shu Yuen Ron HUI, Chi Kwan LEE, Felix Fulih WU
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Patent number: 8125154Abstract: There is provided a method that can detect the lamp type of fluorescent lamps and operate the lamp at the appropriate lamp power. The proposed method involves the classification of lamp characteristics of existing fluorescent lamps and the use of logic detection method such as a fuzzy logic detection and control technique to zoom into the right type of lamp. The information used in the lamp detection includes (1) lamp filament/electrode resistance, (2) lamp voltage and (3) lamp current. These three pieces of information can be used to select the appropriate fluorescent lamp type so that the control gear can operate the lamp at the right rated power. The importance of this invention can lead to a universal electronic ballast that can detect and operate all fluorescent lamps commonly available. It can also be used in a limited capacity to control a limited range of lamps.Type: GrantFiled: July 29, 2008Date of Patent: February 28, 2012Assignee: City University of Hong KongInventors: Shu Yuen Ron Hui, Leung Ming Lee
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Publication number: 20120020075Abstract: Methods and numerical tools for designing and optimizing LED systems are provided to achieve a desired luminous performance and to increase reliability and operating lifetime. In addition, methods for designing LED illumination systems are also disclosed to determine an optimum operating power for a desired output luminous flux, given the condition of the rated power of the LED and the heatsink. By the invention, LED illumination systems can be designed with a suitable choice of LED and/or heatsink.Type: ApplicationFiled: February 12, 2010Publication date: January 26, 2012Applicant: City University of Hong KongInventor: Shu Yuen Ron Hui
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Patent number: 8102235Abstract: Optimal operating techniques are disclosed for using coreless printed-circuit-board (PCB) transformers under (1) minimum input power conditions and (2) maximum energy efficiency conditions. The coreless PCB transformers should be operated at or near the ‘maximum impedance frequency’ (MIF) in order to reduce input power requirement. For maximum energy efficiency, the transformers should be at or near the “maximum efficiency frequency” (MEF) which is below the MIF. The operating principle has been confirmed by measurement and simulation. The proposed operating techniques can be applied to coreless PCB transformers in many circuits that have to meet stringent height requirements, for example to isolate the gates of power MOSFET and IGBT devices from the input power supply.Type: GrantFiled: July 30, 2010Date of Patent: January 24, 2012Assignee: City University of Hong KongInventors: Shu Yuen Ron Hui, Sai Chun Tang
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Patent number: 8049301Abstract: A planar transformer structure, which can be constructed in an integrated semiconductor circuit without using traditional metallic windings. To avoid large thermal expansion of metallic spiral windings and associated mechanical stress on a metal-semiconductor interface, it is suggested that highly doped semiconductor materials with or without silicides and salicides can be used to form windings or conducting paths because their thermal expansion coefficients are similar to that of semiconductor material. The planar semiconductor transformer may find application for low-power and signal transfer that needs electrical isolation.Type: GrantFiled: September 21, 2007Date of Patent: November 1, 2011Assignee: City University of Hong KongInventor: Shu Yuen Ron Hui
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Patent number: 8040103Abstract: A battery charging apparatus comprises an inductive charging platform including a charging surface on which an electrical device to be charged is to be placed, and a first winding for generating lines of magnetic flux generally perpendicular to the charging surface. To compensate for voltage sag caused by a reduction in the flux generated by the first winding, a second winding is located within an area defined by the first winding for generating an auxiliary magnetic flux generally perpendicular to the charging surface.Type: GrantFiled: August 18, 2006Date of Patent: October 18, 2011Assignee: City University of Hong KongInventors: Shu-Yuen Ron Hui, Xun Liu
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Publication number: 20110199799Abstract: Systems, methods, and devices that employ self-driven gate-drive circuitry to facilitate controlling power switches to emulate a diode bridge to synchronously rectify a power signal are presented. A single-phase or multi-phase synchronous rectifier can comprise at least a first pair of switches of a first conducting path and a second pair of switches of a second conducting path that can form or emulate a diode bridge. To facilitate emulating turn-on and turn-off conditions of a diode, a switch can be turned on when voltage across the switch is forward-biased and turned off when switch current is reversed; also, there can be at least one current-controlled switch in each conducting path. Self-driven gate-drive circuitry employs low power components that can facilitate controlling respective switching of the at least first pair and second pair of switches, wherein switching of the switches is also controlled at start-up to emulate a diode bridge.Type: ApplicationFiled: October 6, 2010Publication date: August 18, 2011Applicant: CITY UNIVERSITY OF HONG KONGInventors: Shu Yuen Ron Hui, Wenxing Zhong, Ho Wing Choi
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Publication number: 20110199045Abstract: The present invention provides a power transfer device that wirelessly transfers AC power for charging at least one load, and an associated method of wirelessly transferring power. The device and method of the invention use phase-shift control to control the wireless transfer of the AC power.Type: ApplicationFiled: February 15, 2010Publication date: August 18, 2011Applicant: ConvenientPower HK LtdInventors: Shu Yuen Ron Hui, Wing Choi Ho
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Publication number: 20110187318Abstract: The present invention provides a power transfer device for charging a wireless communication device having a communication bandwidth, and an associated method of transferring power. The device and method of the invention use a spread-spectrum technique to reduce or minimize interference signals within the communication bandwidth and within the power transfer device.Type: ApplicationFiled: February 3, 2010Publication date: August 4, 2011Applicant: ConvenientPower HK LtdInventors: Shu Yuen Ron Hui, Quan Xue, Kwun Chiu Wan
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Publication number: 20110134673Abstract: The present invention provides an AC-DC converter and AC-DC conversion method for converting an AC input provided by a power transfer winding. The AC-DC converter includes a rectifying means for rectifying the AC input into a rectified output, and a control means for controlling the rectifying means based on a comparison between a reference signal and a voltage feedback signal, the voltage feedback signal being based on the rectified output.Type: ApplicationFiled: December 4, 2009Publication date: June 9, 2011Applicant: ConvenientPower HK LtdInventors: Wing Choi Ho, Wai Pong Choi, Shu Yuen Ron Hui
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Publication number: 20110109265Abstract: There is provided a planar inductive battery charging system designed to enable electronic devices to be recharged. The system includes a planar charging module having a charging surface on which a device to be recharged is placed. Within the charging module and parallel to the charging surface is at least one and preferably an array of primary windings that couple energy inductively to a secondary winding formed in the device to be recharged. The invention also provides secondary modules that allow the system to be used with conventional electronic devices not formed with secondary windings.Type: ApplicationFiled: November 19, 2010Publication date: May 12, 2011Applicant: CITY UNIVERSITY OF HONG KONGInventor: Shu-yuen Ron HUI
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Publication number: 20110084655Abstract: The present invention provides a portable electronic device including an antenna having a major planar cross-section, and a power transfer coil having windings parallel to a coil plane, the coil plane extending to the perimeter of the power transfer coil. The antenna and the power transfer coil are arranged such that the major planar cross-section is substantially perpendicular to the coil plane if a line directed perpendicularly from the coil plane intersects the major planar cross-section. An associated method of assembling a portable electronic device is also provided.Type: ApplicationFiled: October 9, 2009Publication date: April 14, 2011Applicant: ConvenientPower HK LtdInventors: Shu Yuen Ron Hui, Quan Xue, Kwun Chiu Wan
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Publication number: 20110070830Abstract: The present invention provides an antenna network for passively or actively enhancing signal transmission or reception of one or more portable transceiver devices. The antenna network includes one or more antennas, each having a coupling portion and a radiating portion, the coupling portion being distributed across a coupling area and the radiating portion being located away from the coupling area, whereby signal transmission or reception of the one or more portable transceiver devices can occur through the radiating portion when the one or more portable transceiver devices are located within the coupling area.Type: ApplicationFiled: September 24, 2009Publication date: March 24, 2011Applicant: ConvenientPower HK LtdInventors: Quan Xue, Shu Yuen Ron Hui, Kwun Chiu Wan
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Publication number: 20110050292Abstract: Optimal operating techniques are disclosed for using coreless printed-circuit-board (PCB) transformers under (1) minimum input power conditions and (2) maximum energy efficiency conditions. The coreless PCB transformers should be operated at or near the ‘maximum impedance frequency’ (MIF) in order to reduce input power requirement. For maximum energy efficiency, the transformers should be at or near the “maximum efficiency frequency” (MEF) which is below the MIF. The operating principle has been confirmed by measurement and simulation. The proposed operating techniques can be applied to coreless PCB transformers in many circuits that have to meet stringent height requirements, for example to isolate the gates of power MOSFET and IGBT devices from the input power supply.Type: ApplicationFiled: July 30, 2010Publication date: March 3, 2011Applicant: CITY UNIVERSITY OF HONG KONGInventors: Shu Yuen Ron HUI, Sai Chun TANG
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Patent number: 7872445Abstract: There is provided a planar inductive battery charging system designed to enable electronic devices to be recharged. The system includes a planar charging module having a charging surface on which a device to be recharged is placed. Within the charging module and parallel to the charging surface is at least one and preferably an array of primary windings that couple energy inductively to a secondary winding formed in the device to be recharged. The invention also provides secondary modules that allow the system to be used with conventional electronic devices not formed with secondary windings.Type: GrantFiled: June 17, 2009Date of Patent: January 18, 2011Assignee: City University of Hong KongInventor: Shu-yuen Ron Hui