Patents by Inventor Pui-In Mak
Pui-In Mak 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: 11931282Abstract: The present disclosure provides a bracewear for spinal correction and a system for posture training. The system for posture training involves both active and passive corrective forces by using the bracewear and a biofeedback system to address the spinal correction, which can eliminate the adversity of conventional hard braces and reduce the psychological and physiological barriers to treatment.Type: GrantFiled: October 15, 2020Date of Patent: March 19, 2024Assignee: The Hong Kong Polytechnic UniversityInventors: Yiu-Wan Joanne Yip, Yin Ling Sit, Ting Hin Mak, Kit Lun Yick, Tsz Hei Cheung, Sui Pui Ng, Kenny Yat Hong Kwan, Mei Chun Cheung, Ming Fai Chan
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Patent number: 11517904Abstract: Provided is a digital microfluidic device for quick polymerase chain reaction. The digital microfluidic device includes an enclosed chamber for holding droplets comprising PCR mixtures. The chamber has an upper layer and a lower layer, which provide a top heater and a bottom heater contained in a thermal electrode respectively to form dual heaters. The lower layer further has an array of electrodes and a dielectric layer, e.g. Norland Optical adhesive 61, coating thereon. Such arrangement of the digital microfluidic device allows quick and homogeneous heating of droplets to lower the heating voltage, shorten the reaction time, and prevent the dielectric layer from breakdown during the thermal cycle.Type: GrantFiled: May 20, 2019Date of Patent: December 6, 2022Assignee: University of MacauInventors: Yanwei Jia, Liang Wan, Cheng Dong, Haoran Li, Tianlan Chen, Pui-In Mak, Rui Paulo da Silva Martins
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Patent number: 11201503Abstract: An exemplary embodiment of the present invention is a wireless power transmission circuit that provides power to a load of variable resistance with an alternating current (AC) power source induced at a secondary coil in a secondary side of the circuit by a primary coil in a primary side of the said circuit. The wireless power transmission circuit includes a switch-controlled capacitor (SCC) and a semi-active rectifier (SAR). The SCC connects to the AC power source. The SCC includes a first capacitor connected in parallel with two electrically controllable switches in series. The SAR connects to output of the SCC for rectifying the output of the SCC, wherein the SAR comprises a bridge circuit that includes two electrically controllable switches. A control angle of the SCC and a conduction angle of the SAR are regulated to provide a load impedance that matches the impedance of the coils.Type: GrantFiled: December 12, 2019Date of Patent: December 14, 2021Assignee: University of MacauInventors: Zhicong Huang, Chi-Seng Lam, Pui-In Mak, Rui Paulo Da Silva Martins
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Publication number: 20210184499Abstract: An exemplary embodiment of the present invention is a wireless power transmission circuit that that provides power to a load of variable resistance with an alternating current (AC) power source induced at a secondary coil in a secondary side of the circuit by a primary coil in a primary side of the said circuit. The wireless power transmission circuit includes a switch-controlled capacitor (SCC) and a semi-active rectifier (SAR). The SCC connects to the AC power source. The SCC includes a first capacitor connected in parallel with two electrically controllable switches in series. The SAR connects to output of the SCC for rectifying the output of the SCC, wherein the SAR comprises a bridge circuit that includes two electrically controllable switches. Both switches in the SCC are turned on for half a cycle and complement to each other and are turned off with a time delay relative to the zero cross points of the AC power source, and the time delay is a control angle of the SCC.Type: ApplicationFiled: December 12, 2019Publication date: June 17, 2021Inventors: Zhicong HUANG, Chi-Seng LAM, Pui-In MAK, Rui Paulo da Silva MARTINS
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Publication number: 20200362400Abstract: The present disclosure discloses an enhancing agent and a kit for enhancing nucleic acid amplification reaction and a method for performing nucleic acid amplification reaction, relating to the field of biotechnology. The enhancing agent disclosed in the present disclosure has a domain capable of binding to fluorescent dye and a quenching group for quenching fluorescence emitted by the fluorescent dye bound to the domain binds. As the binding affinity between the above domain and the fluorescent dye is lower than the binding affinity between a target amplification product of nucleic acid amplification reaction and the fluorescent dye, the enhancing agent not only can reduce inhibition of high-concentration fluorescent dye to amplification reaction, but also can enhance signal intensity of the fluorescent dye in the nucleic acid amplification reaction based on microfluidic chip, improving reliability of application of the fluorescent dye as amplification indicator on the microfluidic chip.Type: ApplicationFiled: February 17, 2020Publication date: November 19, 2020Inventors: Yanwei Jia, Ren Shen, Pui-In Mak, Rui Paulo da Silva Martins
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Patent number: 10756643Abstract: A flipping-capacitor rectifier circuit that enhances an output power of a piezoelectric energy harvester (PEH). The flipping-capacitor rectifier circuit includes a flipping capacitor, a plurality of switches, and an active rectifier. The flipping capacitor is connected in parallel with the PEH and forms at least three reconfiguration phases by turning on one or more of the switches. The active rectifier connects with the flipping capacitor in parallel and rectifies an AC voltage of the PEH. The flipping capacitor flips a voltage across a capacitor of the PEH to enhance the output power of the PEH by extracting power from the capacitor of the PEH.Type: GrantFiled: November 24, 2017Date of Patent: August 25, 2020Assignee: UNIVERSITY OF MACAUInventors: Zhiyuan Chen, Man-Kay Law, Pui-In Mak, Rui Paulo da Silva Martins
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Publication number: 20190358636Abstract: Provided is a digital microfluidic device for quick polymerase chain reaction. The digital microfluidic device includes an enclosed chamber for holding droplets comprising PCR mixtures. The chamber has an upper layer and a lower layer, which provide a top heater and a bottom heater contained in a thermal electrode respectively to form dual heaters. The lower layer further has an array of electrodes and a dielectric layer, e.g. Norland Optical adhesive 61, coating thereon. Such arrangement of the digital microfluidic device allows quick and homogeneous heating of droplets to lower the heating voltage, shorten the reaction time, and prevent the dielectric layer from breakdown during the thermal cycle.Type: ApplicationFiled: May 20, 2019Publication date: November 28, 2019Inventors: Yanwei JIA, Liang WAN, Cheng DONG, Haoran LI, Tianlan CHEN, Pui-In MAK, Rui Paulo da Silva MARTINS
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Patent number: 10436726Abstract: A palm-size portable ?NMR relaxometer system for performing multi-step multi-sample chemical/biological assays, comprising a PCB having a CMOS ?NMR transceiver and a DMF device integrated thereon. A portable magnet has an inner gap configured to at least partially receive the DMF device. The DMF device comprises a platform of electrodes including a sensing site and receives one or more samples for analysis at an electrode and automatically transports the one or more samples on individual paths sequentially to the sensing site, for performing sensing on each sample sequentially. A Butterfly coil disposed on the PCB and underneath the DMF device and is at least partially received in the inner gap. The Butterfly coil excites the sample at the ?NMR sensing site by transducing a magnetic field produced at the sensing site to an electrical signal which is processed by the CMOS ?NMR transceiver to produce an analytical signal.Type: GrantFiled: October 13, 2015Date of Patent: October 8, 2019Assignee: UNIVERSITY OF MACAUInventors: Ka-Meng Lei, Pui-In Mak, Man-Kay Law, Rui Paulo Da Silva Martins
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Publication number: 20190291112Abstract: Provided is a microfluidic chip for generating a plurality of droplets comprising plural droplet-forming units serially connected together, an inlet for receiving the loading fluid and providing the loading fluid to the plural droplet-forming units, and an outlet for discharging the loading fluid remained after passing through the plural droplet-forming units. Each of the individual droplet-forming unit include an inflow channel, a neck channel, a droplet-forming well and a bypass channel therearound, a restricted flow port element, and an outflow channel, the arrangement of which allows the microfluidic chip to form robust and stable droplets for reliable and flexible drug screening assays using a small sample input size.Type: ApplicationFiled: March 21, 2019Publication date: September 26, 2019Inventors: Ada Hang-Heng WONG, Chuxia DENG, Yanwei JIA, Haoran LI, Pui-In MAK, Rui Paulo da Silva MARTINS, Yan LIU, Chi Man VONG, Hang Cheong WONG, Pak Kin WONG, Haitao WANG, Heng SUN
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Publication number: 20190165688Abstract: A flipping-capacitor rectifier circuit that enhances an output power of a piezoelectric energy harvester (PEH). The flipping-capacitor rectifier circuit includes a flipping capacitor, a plurality of switches, and an active rectifier. The flipping capacitor is connected in parallel with the PEH and forms at least three reconfiguration phases by turning on one or more of the switches. The active rectifier connects with the flipping capacitor in parallel and rectifies an AC voltage of the PEH. The flipping capacitor flips a voltage across a capacitor of the PEH to enhance the output power of the PEH by extracting power from the capacitor of the PEH.Type: ApplicationFiled: November 24, 2017Publication date: May 30, 2019Inventors: Zhiyuan CHEN, Man-Kay LAW, Pui-In MAK, Rui Paulo da Silva MARTINS
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Patent number: 10016759Abstract: According to one aspect of the present disclosure, a control-engaged electrode-driving method for droplet actuation is provided. The method includes, a first pulse is provided to a first electrode for kicking off a droplet till a centroid of the droplet reaching a centroid of the first electrode. A second pulse is provided to a second electrode when a leading edge of the droplet reaching the second electrode.Type: GrantFiled: April 10, 2015Date of Patent: July 10, 2018Assignee: UNIVERSITY OF MACAUInventors: Cheng Dong, Tianlan Chen, Jie Gao, Yanwei Jia, Pui-In Mak, Mang-I Vai, Rui Paulo da Silva Martins
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Patent number: 9808800Abstract: According to one aspect of the present disclosure, a control-engaged electrode-driving method for droplet actuation is provided. The method includes, a first voltage is provided to a first electrode for licking off a droplet. A second voltage is naturally discharged to a third voltage for maintaining a droplet movement. A fourth voltage is provided to the first electrode for accelerating the droplet. Naturally discharging from the second voltage to the third voltage and providing the fourth voltage to the first electrode are repeated. The first voltage is provided to a second electrode when a centroid of the droplet reaching a centroid of the first electrode. Naturally discharging from the second voltage to the third voltage and providing the fourth voltage to the second electrode are repeated.Type: GrantFiled: April 10, 2015Date of Patent: November 7, 2017Assignee: UNVERSITY OF MACAUInventors: Tianlan Chen, Cheng Dong, Jie Gao, Yanwei Jia, Pui-In Mak, Mang-I Vai, Rui Paulo da Silva Martins
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Patent number: 9751083Abstract: According to one aspect of the present disclosure, a digital microfluidic system is provided. The digital microfluidic system includes a device, a control electronics, a field programmed gate array (FPGA), and a computer. The device includes a droplet on an electrode array, where the electrode array includes a plurality of electrodes. The control electronics connects to the device and provides an actuation pulse to the electrodes, where the control electronics generates a capacitance-derived frequency signal. The FPGA connects to the control electronics and collects the capacitance-derived frequency signal. The computer connects to the FPGA, the computer uses a frequency of the capacitance-derived frequency signal to calculate a precise droplet position and generates a duration voltage signal.Type: GrantFiled: April 7, 2015Date of Patent: September 5, 2017Assignee: UNIVERSITY OF MACAUInventors: Jie Gao, Tianlan Chen, Cheng Dong, Yanwei Jia, Pui-In Mak, Mang-I Vai, Rui Paulo da Silva Martins
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Patent number: 9680448Abstract: The present invention discloses a gain-boosted n-path passive-mixer-first receiver. According to another aspect of the present disclosure, a gain-boosted n-path passive-mixer-first receiver is provided. The receiver includes a number n of switch-capacitor (sc) sets, a resistor, and a transconductance amplifier. The sc sets connect in parallel, and the sc sets have a first node and a second node. The resistor connects to the first node. The transconductance amplifier connects to the resistor and the second node.Type: GrantFiled: September 23, 2015Date of Patent: June 13, 2017Assignee: UNIVERSITY OF MACAUInventors: Pui-In Mak, Zhicheng Lin, Rui Paulo da Silva Martins
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Patent number: 9673781Abstract: According to another aspect of the present disclosure, a radio-frequency-to-baseband-function-reuse receiver with shared amplifiers for common-mode and differential-mode amplification is provided. The receiver includes two set networks connected in parallel. The set networks includes a first and a second input capacitors, a first and a second output capacitors, a first transconductance amplifier having an input terminal, a second transconductance amplifier having an input terminal, a first switch, and a second switch. The first and the second input capacitors connect to a first node. The first and the second output capacitors connect to a second node. The first transconductance amplifier connects between the first input capacitor and the first output capacitor. The second transconductance amplifier connects between the second input capacitor and the second output capacitor. The first switch connects between the input terminal of the first transconductance amplifier and the second node.Type: GrantFiled: October 16, 2015Date of Patent: June 6, 2017Assignee: UNIVERSITY OF MACAUInventors: Pui-In Mak, Zhicheng Lin, Rui Paulo da Silva Martins
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Publication number: 20170102344Abstract: A palm-size portable ?NMR relaxometer system for performing multi-step multi-sample chemical/biological assays, comprising a PCB having a CMOS ?NMR transceiver and a DMF device integrated thereon. A portable magnet has an inner gap configured to at least partially receive the DMF device. The DMF device comprises a platform of electrodes including a sensing site and receives one or more samples for analysis at an electrode and automatically transports the one or more samples on individual paths sequentially to the sensing site, for performing sensing on each sample sequentially. A Butterfly coil disposed on the PCB and underneath the DMF device and is at least partially received in the inner gap. The Butterfly coil excites the sample at the ?NMR sensing site by transducing a magnetic field produced at the sensing site to an electrical signal which is processed by the CMOS ?NMR transceiver to produce an analytical signal.Type: ApplicationFiled: October 13, 2015Publication date: April 13, 2017Applicant: UNIVERSITY OF MACAUInventors: Ka-Meng LEI, Pui-In MAK, Man-Kay LAW, Rui Paulo DA SILVA MARTINS
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Patent number: 9479140Abstract: A complex-pole load is configured as a parallel circuit, having 4 transistors arranged in pairs. Each pair of transistors has a transistor gated by a control voltage sources, and connected in parallel with a transistor diode connected for gating by the respective input. The control voltage sources result in the circuit synthesizing a first order complex pole at a positive IF (+IF) or a negative IF (?IF) for channel selection and image rejection, offering image rejection and channel selection concurrently.Type: GrantFiled: April 17, 2014Date of Patent: October 25, 2016Assignee: UNIVERSITY OF MACAUInventors: Zhicheng Lin, Pui-In Mak, Rui Paulo da Silva Martins
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Publication number: 20160296929Abstract: According to one aspect of the present disclosure, a control-engaged electrode-driving method for droplet actuation is provided. The method includes, a first voltage is provided to a first electrode for licking off a droplet. A second voltage is naturally discharged to a third voltage for maintaining a droplet movement. A fourth voltage is provided to the first electrode for accelerating the droplet. Naturally discharging from the second voltage to the third voltage and providing the fourth voltage to the first electrode are repeated. The first voltage is provided to a second electrode when a centroid of the droplet reaching a centroid of the first electrode. Naturally discharging from the second voltage to the third voltage and providing the fourth voltage to the second electrode are repeated.Type: ApplicationFiled: April 10, 2015Publication date: October 13, 2016Inventors: Tianlan CHEN, Cheng DONG, Jie GAO, Yanwei JlA, Pui-In MAK, Mang-I VAI, Rui Paulo da Silva MARTINS
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Publication number: 20160296935Abstract: According to one aspect of the present disclosure, a digital microfluidic system is provided. The digital microfluidic system includes a device, a control electronics, a field programmed gate array (FPGA), and a computer. The device includes a droplet on an electrode array, where the electrode array includes a plurality of electrodes. The control electronics connects to the device and provides an actuation pulse to the electrodes, where the control electronics generates a capacitance-derived frequency signal. The FPGA connects to the control electronics and collects the capacitance-derived frequency signal. The computer connects to the FPGA, the computer uses a frequency of the capacitance-derived frequency signal to calculate a precise droplet position and generates a duration voltage signal.Type: ApplicationFiled: April 7, 2015Publication date: October 13, 2016Inventors: Jie GAO, Tianlan CHEN, Cheng DONG, Yanwei JIA, Pui-In MAK, Mang-I VAI, Rui Paulo da Silva MARTINS
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Publication number: 20160296934Abstract: According to one aspect of the present disclosure, a control-engaged electrode-driving method for droplet actuation is provided. The method includes, a first pulse is provided to a first electrode for kicking off a droplet till a centroid of the droplet reaching a centroid of the first electrode. A second pulse is provided to a second electrode when a leading edge of the droplet reaching the second electrode.Type: ApplicationFiled: April 10, 2015Publication date: October 13, 2016Inventors: Cheng DONG, Tianlan CHEN, Jie GAO, Yanwei JIA, Pui-In MAK, Mang-I VAI, Rui Paulo da Silva MARTINS