Patents by Inventor Wing Cheong Chan
Wing Cheong Chan 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: 20230366881Abstract: The application relates to a method and device for quantitatively analyzing the detection results of lateral flow-type test kits. Disclosed is a method for quantitatively analyzing the test results of a lateral flow-type test kit wherein the test kit includes a result area in which a control C-line region and a detection T-line region are set.Type: ApplicationFiled: March 29, 2023Publication date: November 16, 2023Inventors: Cheung Hoi Yu, Shui Ying Tsang, Wing Cheong Chan
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Patent number: 11804711Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: GrantFiled: January 4, 2022Date of Patent: October 31, 2023Assignee: STRIPE, INC.Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
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Publication number: 20220131371Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: ApplicationFiled: January 4, 2022Publication date: April 28, 2022Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
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Patent number: 11251611Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: GrantFiled: June 8, 2020Date of Patent: February 15, 2022Assignee: BBPOS LIMITEDInventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
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Publication number: 20200303921Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: ApplicationFiled: June 8, 2020Publication date: September 24, 2020Inventors: Wing Cheong CHAN, Hwai Sian TSAI, Chi Wah LO
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Patent number: 10686313Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: GrantFiled: February 25, 2019Date of Patent: June 16, 2020Assignee: BBPOS LIMTEDInventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
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Publication number: 20190190262Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: ApplicationFiled: February 25, 2019Publication date: June 20, 2019Inventors: WING CHEONG CHAN, HWAI SIAN TSAI, CHI WAH LO
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Patent number: 10256627Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: GrantFiled: October 5, 2017Date of Patent: April 9, 2019Assignee: BBPOS LimitedInventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
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Publication number: 20180048147Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: ApplicationFiled: October 5, 2017Publication date: February 15, 2018Inventors: WING CHEONG CHAN, HWAI SIAN TSAI, CHI WAH LO
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Patent number: 9793712Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: GrantFiled: September 19, 2014Date of Patent: October 17, 2017Assignee: BBPOS LIMITEDInventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
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Publication number: 20150001946Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: ApplicationFiled: September 19, 2014Publication date: January 1, 2015Inventors: WING CHEONG CHAN, HWAI SIAN TSAI, CHI WAH LO
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Patent number: 8840017Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: GrantFiled: July 31, 2012Date of Patent: September 23, 2014Assignee: BBPOS LimitedInventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
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Patent number: 8336771Abstract: A dangle, which plugs into the audio/earpiece jack of host devices, allows them to accept payment cards as a point of sale (POS) terminal. It contains a magnetic stripe (magstripe) card reader, a smart card reader, and/or a proximity card reader (reader(s)); a microprocessor or microcontroller (CPU); and a circuit for drawing power from a digital audio signal (power circuit). Payment card data is collected by the reader(s), passed to the CPU where it is encrypted, encoded, and modulated, sent to the host device through the Microphone input contact of the audio/earpiece jack, then transmitted via one the host device's networks to a merchant account provider for processing. A digital audio signal, constantly generated by the host device, provides power to the dongle via the power circuit. The power circuit converts the digital audio signal to stable DC power with the appropriate voltage for powering the dongle's other components.Type: GrantFiled: April 27, 2010Date of Patent: December 25, 2012Assignee: BBPOS LimitedInventors: Hwai Sian Tsai, Wing Cheong Chan
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Publication number: 20120293001Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.Type: ApplicationFiled: July 31, 2012Publication date: November 22, 2012Applicant: BBPOS LIMITEDInventors: Wing Cheong CHAN, Hwai Sian TSAI, Chi Wah LO
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Publication number: 20110087589Abstract: Debit or credit card transaction data includes one or a combination of digital card data read from a debit or credit card, transaction amount, shop identification information, and personal identification information like PIN numbers. This card transaction 5 data is in digital form. Where sales are performed on-the-go, it is now necessary to contact the card data center manually to obtain necessary information, for example approval code for the sales. Although it seems straight forward to send the digital card data over a mobile phone to resolve this issue, this approach has various problems including lack of support of all mobile 10 phones for data communication, expensive subscription fee to data plan is required, and unbounded delay in the transaction time. The current invention provides a method for performing debit or credit card transactions over mobile phone networks.Type: ApplicationFiled: October 9, 2009Publication date: April 14, 2011Applicant: BBPOS LimitedInventors: Derek Wing Cheong CHAN, Alan MORGAN
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Patent number: 7915858Abstract: Methods and principles are described for systematizing localized charging, load identification and bi-directional communication in a planar battery charging system. Also described is control circuitry for selectively energizing a primary winding when a load is placed on the platform. The optimization of the size of the receiver winding compared to the transmitter winding is discussed, while the associated communication methods include techniques for load identification, compatibility checks, hand-shaking and communication of charging status.Type: GrantFiled: October 30, 2007Date of Patent: March 29, 2011Assignee: City University of Hong KongInventors: Xun Liu, Wing Choi Ho, Ron Shu Yuen Hui, Wing Cheong Chan
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Publication number: 20090108805Abstract: Methods and principles are described for systematizing localized charging, load identification and bi-directional communication in a planar battery charging system. Also described is control circuitry for selectively energizing a primary winding when a load is placed on the platform. The optimization of the size of the receiver winding compared to the transmitter winding is discussed, while the associated communication methods include techniques for load identification, compatibility checks, hand-shaking and communication of charging status.Type: ApplicationFiled: October 30, 2007Publication date: April 30, 2009Applicant: City University of Hong KongInventors: Xun Liu, Wing Choi Ho, Ron Shu Yuen Hui, Wing Cheong Chan
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Publication number: 20050157854Abstract: A recording system for a Private Branch Automatic Exchange (PBAX) comprises a recording unit for recording a telephone conversation on the public line side of the PBAX and coding units for connecting to private lines of the PBAX and for identifying to the recording unit the private line in use. The recording unit may include a transformer for detecting a telephone conversation signal, a processor and a storage medium.Type: ApplicationFiled: January 16, 2004Publication date: July 21, 2005Inventors: Chi Wah Lo, Tai Kwan Tang, Hwai Sian Tsai, Wing Cheong Chan