Patents by Inventor Andrea Stona
Andrea Stona 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: 11545890Abstract: A device and a method for providing an electrical current to an electrical load is disclosed. In particular, the device comprises a memory storage device for storing a plurality of ideal voltage waveforms; an electronic controller arranged in data communication with the memory storage device, the electronic controller operable to select one of the plurality of ideal voltage waveforms to compute a reference voltage and a switching period based on a predetermined rule; and an electronic switch arranged to receive the switching period to switch the electronic switch between an on state and an off state, wherein the electrical current is calculated based on a function of the reference voltage and the switching period of the electronic switch.Type: GrantFiled: August 10, 2018Date of Patent: January 3, 2023Assignee: OPULENT ELECTRONICS INTERNATIONAL PTE. LTD.Inventors: Kai Fook Francis Wee, Andrea Stona, Hai Boon Tan
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Publication number: 20200252004Abstract: A device and a method for providing an electrical current to an electrical load is disclosed. In particular, the device comprises a memory storage device for storing a plurality of ideal voltage waveforms; an electronic controller arranged in data communication with the memory storage device, the electronic controller operable to select one of the plurality of ideal voltage waveforms to compute a reference voltage and a switching period based on a predetermined rule; and an electronic switch arranged to receive the switching period to switch the electronic switch between an on state and an off state, wherein the electrical current is calculated based on a function of the reference voltage and the switching period of the electronic switch.Type: ApplicationFiled: August 10, 2018Publication date: August 6, 2020Applicant: OPULENT ELECTRONICS INTERNATIONAL PTE. LTD.Inventors: Kai Fook Francis WEE, Andrea STONA, Hai Boon TAN
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Patent number: 9894727Abstract: A LED driver having at least one Integrated Circuit (IC), the IC programmable using a hardware description language; a first electronic switch operable to provide a first switching time period to control power factor voltage, the first switching time period programmable by the at least one IC; and a second electronic switch operable to provide a second switching time period to regulate ripple free constant DC electrical current flowing into the at least one LED, the second switching time period is programmable by the at least one IC.Type: GrantFiled: July 13, 2016Date of Patent: February 13, 2018Assignee: OPULENT ELECTRONICS INTERNATIONAL PTE LTDInventors: Kai Fook Francis Wee, Chye Boon Tan, Hai Boon Tan, Andrea Stona, Soon Thiam Chan
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Patent number: 9877363Abstract: A device for providing regulated current to an electrical load comprising a current controller operable at predetermined intervals (clock cycles) to receive:—i. a desired input reference voltage; and ii. a feedback voltage obtained from an electronic switch; wherein the current controller is operable to compare the feedback voltage with the desired input reference voltage and provide regulated current to the electrical load based on calculation of the switch off time of the electronic switch at each clock cycle; the calculation of the switch off time operable to achieve a continuous-conduction-mode (CCM) for the device under normal operating conditions, is disclosed.Type: GrantFiled: February 9, 2015Date of Patent: January 23, 2018Assignee: OPULENT ELECTRONICS INTERNATIONAL PTE LTDInventors: Francis Kai Fook Wee, Leopoldo Groppi, Andrea Stona
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Publication number: 20170118814Abstract: A LED driver having at least one Integrated Circuit (IC), the IC programmable using a hardware description language; a first electronic switch operable to provide a first switching time period to control power factor voltage, the first switching time period programmable by the at least one IC; and a second electronic switch operable to provide a second switching time period to regulate ripple free constant DC electrical current flowing into the at least one LED, the second switching time period is programmable by the at least one IC.Type: ApplicationFiled: July 13, 2016Publication date: April 27, 2017Applicant: OPULENT ELECTRONICS INTERNATIONAL PTE LTDInventors: Kai Fook Francis Wee, Chye Boon Tan, Hai Boon Tan, Andrea Stona, Soon Thiam Chan
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Publication number: 20160338159Abstract: A device for providing regulated current to an electrical load comprising a current controller operable at predetermined intervals (clock cycles) to receive:—i. a desired input reference voltage; and ii. a feedback voltage obtained from an electronic switch; wherein the current controller is operable to compare the feedback voltage with the desired input reference voltage and provide regulated current to the electrical load based on calculation of the switch off time of the electronic switch at each clock cycle; the calculation of the switch off time operable to achieve a continuous-conduction-mode (CCM) for the device under normal operating conditions, is disclosed.Type: ApplicationFiled: February 9, 2015Publication date: November 17, 2016Applicant: OPULENT ELECTRONICS INTERNATIONAL PTE LTDInventors: FRANCIS KAI FOOK WEE, LEOPOLDO GROPPI, ANDREA STONA
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Patent number: 9408273Abstract: A system for driving a plurality of high powered LED units, the system comprising a single driver for providing ripple free constant direct current to a plurality of high powered LED lamp units, wherein the single driver comprises a digital controller programmable to adjust the ripple free constant direct current at every predetermined time interval based on detection and computation of the duration taken for the energy to be discharged to the LED lamp unit to adjust the ripple free constant direct current. The above system achieves a one driver to many LED lamp units such that it alleviates or eliminates the need to have a driver attached to each LED lamp unit.Type: GrantFiled: November 2, 2012Date of Patent: August 2, 2016Assignee: OPULENT ELECTRONICS INTERNATIONAL PTE LTD.Inventors: Kai Fook Francis Wee, Chye Boon Tan, Hai Boon Tan, Andrea Stona, Soon Thiam Chan
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Publication number: 20150312989Abstract: A system for driving a plurality of high powered LED units, the system comprising a single driver for providing ripple free constant direct current to a plurality of high powered LED lamp units, wherein the single driver comprises a digital controller programmable to adjust the ripple free constant direct current at every predetermined time interval based on detection and computation of the duration taken for the energy to be discharged to the LED lamp unit to adjust the ripple free constant direct current. The above system achieves a one driver to many LED lamp units such that it alleviates or eliminates the need to have a driver attached to each LED lamp unit.Type: ApplicationFiled: November 2, 2012Publication date: October 29, 2015Applicant: OPULENT ELECTRONICS INTERNATIONAL PTE LTDInventors: Kai Fook Francis Wee, Chye Boon Tan, Hai Boon Tan, Andrea Stona, Soon Thiam Chan
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Patent number: 9084303Abstract: In a device and method for providing electrical current to a Light Emitting diode (LED) via switch mode power converter, at least one Integrated Circuit (IC) is provided and uses a hardware description language; an electronic switch configurable to have a switching time period. An Analog to Digital converter (ADC) is configured to obtain a digitized voltage input. A voltage comparator is configured to obtain a discharge time of an inductive element of the switch mode power converter at each time period. During operation, the IC obtains the digitized voltage input, the discharge time of the inductive element, the desired electrical current, a reference constant, and the switching time period of the electronic switch as inputs and calculates the switch-on time of the electronic switch at each switching time period, so that the switch-on time of the electronic switch regulates the electrical current flowing into the LED.Type: GrantFiled: June 4, 2010Date of Patent: July 14, 2015Assignee: Opulent Electronics International Pte. LtdInventors: Kai Fook Francis Wee, Andrea Stona, Leopoldo Groppi, Kwok Wing Man, Foo Wing Chong
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Publication number: 20130106304Abstract: In a device and method for providing electrical current to a Light Emitting diode (LED) via switch mode power converter, at least one Integrated Circuit (IC) is provided and uses a hardware description language; an electronic switch configurable to have a switching time period. An Analogue to Digital converter (ADC) is configured to obtain a digitized voltage input. A voltage comparator is configured to obtain a discharge time of an inductive element of the switch mode power converter at each time period. During operation, the IC obtains the digitized voltage input, the discharge time of the inductive element, the desired electrical current, a reference constant, and the switching time period of the electronic switch as inputs and calculates the switch-on time of the electronic switch at each switching time period, so that the switch-on time of the electronic switch regulates the electrical current flowing into the LED.Type: ApplicationFiled: June 4, 2010Publication date: May 2, 2013Applicant: OPULENT ELECTRONICS INTERNATIONAL PTE LTDInventors: Kai Fook Francis Wee, Andrea Stona, Leopoldo Groppi, Kwok Wing Man, Foo Wing Chong
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Patent number: 7994421Abstract: A photovoltaic device has nanoparticles sandwiched between a conductive substrate and a charge selective transport layer. Each of the nanoparticles has a ligand shell attached to the nanoparticle core. A first type of ligand is electron rich and attached to one hemisphere of the nanoparticle core, while a second type of ligand is electron poor and attached to an opposite hemisphere of the core. Consequently, the ligand shell induces an electric field within the nanoparticle, enhancing the photovoltaic effect. The arrangement of ligands types on different sides of the nanoparticle is obtained by a process involving ligand substitution after adhering the nanoparticles to the conductive substrate.Type: GrantFiled: October 30, 2008Date of Patent: August 9, 2011Assignee: Voxtel, Inc.Inventors: George M. Williams, David M. Schut, Andreas Stonas
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Publication number: 20090211629Abstract: A photovoltaic device has nanoparticles sandwiched between a conductive substrate and a charge selective transport layer. Each of the nanoparticles has a ligand shell attached to the nanoparticle core. A first type of ligand is electron rich and attached to one hemisphere of the nanoparticle core, while a second type of ligand is electron poor and attached to an opposite hemisphere of the core. Consequently, the ligand shell induces an electric field within the nanoparticle, enhancing the photovoltaic effect. The arrangement of ligands types on different sides of the nanoparticle is obtained by a process involving ligand substitution after adhering the nanoparticles to the conductive substrate.Type: ApplicationFiled: October 30, 2008Publication date: August 27, 2009Inventors: George M. Williams, David M. Schut, Andreas Stonas
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Publication number: 20070044043Abstract: A system for imaging a substrate can comprise an image data source, an electromagnetic radiation source operatively connected to the image data source and configured to emit electromagnetic radiation in accordance with information provided by the image data source, and a DBR film applied to a substrate. The DBR film can comprise two types of film layers, wherein the two types of film layers are each stable at ambient temperature, each of the two types of film layers having a glass transition temperature (TG) that is lower than the temperature needed to produce deformation of bulk material of the two types of film layers upon interaction with the electromagnetic radiation.Type: ApplicationFiled: August 22, 2005Publication date: February 22, 2007Inventors: David Schut, Andreas Stonas, Robert Bass, Timothy Weber