Patents by Inventor Christiaan Van Dijk
Christiaan Van Dijk 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: 20230049832Abstract: A Direct Current, DC, voltage source arranged for providing a DC voltage based on an input voltage between two input terminals, wherein said DC voltage source comprises a transformer arranged for receiving a supply current, at a first side of the transformer, and for transforming said supply current to a circulating current at a second side of the transformer, a first and a second input terminal for receiving an input voltage for setting a DC voltage to be provided by said DC voltage source, a first diode, wherein an anode of said first diode is connected to a first end of said second side of said transformer, and wherein a cathode of said first diode is connected to said first input terminal, a current regulator circuit for assuring that an amount of current circulating current is shunted from the first diode.Type: ApplicationFiled: January 12, 2021Publication date: February 16, 2023Inventors: Bernhard Christiaan VAN DIJK, Paul Robert VELDMAN
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Patent number: 11522462Abstract: A switch mode power converter comprises an inverter, a transformer having a primary side winding and a secondary side winding and a first inductor in series with the primary side winding. A second inductor is provided magnetically coupled to the first inductor, and a voltage at one end of the second inductor is used as a feedback signal for indirectly measuring (i.e. approximating) the secondary side voltage, but with measurement at the primary side.Type: GrantFiled: November 19, 2019Date of Patent: December 6, 2022Assignee: Signify Holding B.V.Inventor: Bernhard Christiaan Van Dijk
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Patent number: 11310882Abstract: A circuit is for generating a DC voltage supply from a higher voltage AC signal. A first capacitor (C1) is in series between an input (12) and a first node (N1), a first diode (D1) is in forward direction between the first node and a DC voltage supply node (Nout), a second capacitor (C2) is between the DC voltage supply node and a reference terminal, and a second diode (D2) is in forward direction between the reference terminal and the first node. This defines a general charge pump architecture. A third capacitor (C3) is then provided between the first node and a second node (N2) and a controllable voltage supply (60) defines the voltage at the second node (N2). This adjustable node voltage improves the efficiency of the circuit, in that excess current can be dissipated efficiently, and it can be implemented with a simple circuit.Type: GrantFiled: December 12, 2019Date of Patent: April 19, 2022Assignee: SIGNIFY HOLDING B.V.Inventors: Bernhard Christiaan Van Dijk, Paul Robert Veldman
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Publication number: 20220070984Abstract: A circuit is for generating a DC voltage supply from a higher voltage AC signal. A first capacitor (C1) is in series between an input (12) and a first node (N1), a first diode (D1) is in forward direction between the first node and a DC voltage supply node (Nout), a second capacitor (C2) is between the DC voltage supply node and a reference terminal, and a second diode (D2) is in forward direction between the reference terminal and the first node. This defines a general charge pump architecture. A third capacitor (C3) is then provided between the first node and a second node (N2) and a controllable voltage supply (60) defines the voltage at the second node (N2). This adjustable node voltage improves the efficiency of the circuit, in that excess current can be dissipated efficiently, and it can be implemented with a simple circuit.Type: ApplicationFiled: December 12, 2019Publication date: March 3, 2022Inventors: Bernhard Christiaan VAN DIJK, Paul Robert VELDMAN
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Publication number: 20220029544Abstract: A switch mode power converter comprises an inverter, a transformer having a primary side winding and a secondary side winding and a first inductor in series with the primary side winding. A second inductor is provided magnetically coupled to the first inductor, and a voltage at one end of the second inductor is used as a feedback signal for indirectly measuring (i.e. approximating) the secondary side voltage, but with measurement at the primary side.Type: ApplicationFiled: November 19, 2019Publication date: January 27, 2022Inventor: BERNHARD CHRISTIAAN VAN DIJK
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Publication number: 20200389093Abstract: A switch mode power converter has a transformer for isolating the output and an opto-isolator for providing both voltage and current feedback. A light source of the opto-isolator is in series between first and second adjustment signals, wherein one is based on current sensing and the other is based on voltage sensing. A light detector of the opto-isolator provides an isolated feedback signal for controlling the converter.Type: ApplicationFiled: November 12, 2018Publication date: December 10, 2020Inventors: JACOB TIETEMA, PAUL ROBERT VELDMAN, BERNHARD CHRISTIAAN VAN DIJK
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Patent number: 10314135Abstract: The present invention relates to an LED retrofit lamp (1) for being connected to a high frequency electronic ballast (26), the high frequency electronic ballast (26) being adapted for providing a voltage and a current to the LED retrofit lamp (1). The LED retrofit lamp (1) comprises an LED unit (4), an adapting unit (30) for adapting the voltage and the current provided by the high frequency electronic ballast (26) to a voltage and a current for operating the LED unit (4), a detecting unit (40) for detecting an electrical value that depends on the current provided by the high frequency electronic ballast (26), and a ballast protection unit (60) for performing, in dependence of the detected electrical value, an operation for protecting the high frequency electronic ballast (26) from an overcurrent situation. This allows avoiding an unsafe situation, such as when the high frequency electronic ballast (26) is overheated.Type: GrantFiled: August 27, 2014Date of Patent: June 4, 2019Assignee: SIGNIFY HOLDING B.V.Inventors: Borong Su, Bernhard Christiaan van Dijk, William Peter Mechtildis Marie Jans, Haimin Tao
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Patent number: 10110118Abstract: An apparatus (400A, 400B, 400C, 400D, 500A, 500B, 800) supplies power to an output thereof. The apparatus includes: an isolation transformer (110) and a rectifier (120). The isolation transformer has a parasitic capacitance (Cp) between one of its input terminals (1S/1F) and one of its output terminals (2S/2F). The rectifier has a pair of input terminals connected to the output terminals of the isolation transformer, and a pair of output terminals connected across the apparatus' output. The rectifier includes a plurality of diodes (D1/D2/D3/D4) connected in a bridge. The apparatus also includes a compensation device for compensating for an increase in an output voltage across the output of the apparatus due to a charge pump effect of the parasitic capacitance. The compensation device includes at least one compensation capacitor (410, 510/520, 810/812) connected across one of the diodes of the bridge.Type: GrantFiled: September 6, 2015Date of Patent: October 23, 2018Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Sanbao Zheng, Bernhard Christiaan Van Dijk, Zhihua Song
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Publication number: 20180023770Abstract: The invention relates to a light emitting device (2) for retrofitting a fluorescent lamp comprising two sets of connecting pins (21, 23, 21?, 23?) for connecting the light emitting system (1) to a lighting fixture, one first (611) and one second (613) filament unit, encapsulated in a bulb and fed through it, electrically coupled to the connecting pins (611, 613) and a solid state light source connected between the filament units.Type: ApplicationFiled: January 28, 2016Publication date: January 25, 2018Inventors: Raimundo DE HEER GALISTEO, Bernhard Christiaan VAN DIJK, Haimin TAO, Tian Xiang WEN, Sascha KONDIC, Pieter Johannes STOBBELAAR, Paul Robert VELDMAN
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Publication number: 20170279347Abstract: An apparatus (400A, 400B, 400C, 400D, 500A, 500B, 800) supplies power to an output thereof. The apparatus includes: an isolation transformer (110) and a rectifier (120). The isolation transformer has a parasitic capacitance (Cp) between one of its input terminals (1S/1F) and one of its output terminals (2S/2F). The rectifier has a pair of input terminals connected to the output plurality of diodes (D1/D2/D3/D4) connected in a bridge. The apparatus also includes a compensation device for compensating for an increase in an output voltage across the output of the apparatus due to a charge pump effect of the parasitic capacitance. The compensation device includes at least one compensation capacitor (410, 510/520, 810/812) connected across one of the diodes of the bridge.Type: ApplicationFiled: September 6, 2015Publication date: September 28, 2017Inventors: Sanbao ZHENG, Bernhard Christiaan VAN DIJK, Zhihua SONG
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Patent number: 9743466Abstract: An LED replacement lamp (20) is described. An LED lighting assembly (40) comprising LED lighting elements is electrically connected to filament emulation circuits, connected to electrical contacts at each of two opposite ends (22a, 22b) of an elongated member. The filament emulation circuits (42) each comprise a first resistor circuit (46) and a second resistor circuit (48) connected to first and second electrical contacts (26a, 24a). The first and second resistor circuits (46, 48) are connected to the LED lighting assembly (40) at a common terminal (50). In order to provide an LED replacement lamp for safe operation even in cases of component failure, and if the replacement lamp (20) is used in incorrect wiring configurations, the first and second resistor circuits (46, 48) each comprise a series connection of at least two resistors, in such a way that in case of failure of one of the resistors, the total resistance of the filament emulation circuits (42) remains above a determined resistance value.Type: GrantFiled: July 23, 2014Date of Patent: August 22, 2017Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Haimin Tao, Bernhard Christiaan Van Dijk, Borong Su
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Patent number: 9622317Abstract: The present invention relates to an LED retrofit lamp (700) adapted for operation with an alternating current. The LED lamp comprises an LED unit (740), a mains current line, first and second switching devices (710, 720) (e.g., first and second relays), and a control unit (730). The control unit (730) detects an ignition voltage on the mains current line. In response to detecting the ignition voltage on the mains current line, the control unit (730) sets the first and second switching devices (710, 720) to a conducting state such that the LED unit (740) is connected to power. By using the first and second switching devices (710, 720), safety of the LED lamp (700) is improved, in particular when installing the lamp (700) into a fixture designed for fluorescent lamps.Type: GrantFiled: August 29, 2014Date of Patent: April 11, 2017Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Bernd Ackermann, Haimin Tao, Georg Sauerlaender, Bernhard Christiaan Van Dijk, Borong Su
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Patent number: 9480123Abstract: The present invention relates to an LED retrofit lamp adapted for operation with an alternating current. The LED lamp comprises an LED unit, first and second switching devices (e.g., first and second relays), a startup voltage supply unit (1010) coupled in parallel to the first switching device, an ignition detection unit (1020) coupled in parallel to the second switching device, and a switch drive unit (1030) for setting the first and second switching devices to a conducting state. If one of the first and second switching devices is shorted either no startup supply voltage or no detection signal is provided, such that the failure is indicated externally to a user.Type: GrantFiled: August 18, 2014Date of Patent: October 25, 2016Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Bernhard Christiaan Van Dijk, Haimin Tao, Borong Su
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Publication number: 20160227622Abstract: The present invention relates to an LED retrofit lamp (700) adapted for operation with an alternating current. The LED lamp comprises an LED unit (740), a mains current line, first and second switching devices (710, 720) (e.g., first and second relays), and a control unit (730). The control unit (730) detects an ignition voltage on the mains current line. In response to detecting the ignition voltage on the mains current line, the control unit (730) sets the first and second switching devices (710, 720) to a conducting state such that the LED unit (740) is connected to power. By using the first and second switching devices (710, 720), safety of the LED lamp (700) is improved, in particular when installing the lamp (700) into a fixture designed for fluorescent lamps.Type: ApplicationFiled: August 29, 2014Publication date: August 4, 2016Inventors: BERND ACKERMANN, HAIMIN TAO, GEORG SAUERLAENDER, BERNHARD CHRISTIAAN VAN DIJK, BORONG SU
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Publication number: 20160174308Abstract: An LED replacement lamp (20) is described. An LED lighting assembly (40) comprising LED lighting elements is electrically connected to filament emulation circuits, connected to electrical contacts at each of two opposite ends (22a, 22b) of an elongated member. The filament emulation circuits (42) each comprise a first resistor circuit (46) and a second resistor circuit (48) connected to first and second electrical contacts (26a, 24a). The first and second resistor circuits (46, 48) are connected to the LED lighting assembly (40) at a common terminal (50). In order to provide an LED replacement lamp for safe operation even in cases of component failure, and if the replacement lamp (20) is used in incorrect wiring configurations, the first and second resistor circuits (46, 48) each comprise a series connection of at least two resistors, in such a way that in case of failure of one of the resistors, the total resistance of the filament emulation circuits (42) remains above a determined resistance value.Type: ApplicationFiled: July 23, 2014Publication date: June 16, 2016Inventors: Haimin Tao, Bernhard Christiaan Van Dijk, Borong Su
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Publication number: 20160174329Abstract: The present invention relates to an LED retrofit lamp (1) for being connected to a high frequency electronic ballast (26), the high frequency electronic ballast (26) being adapted for providing a voltage and a current to the LED retrofit lamp (1). The LED retrofit lamp (1) comprises an LED unit (4), an adapting unit (30) for adapting the voltage and the current provided by the high frequency electronic ballast (26) to a voltage and a current for operating the LED unit (4), a detecting unit (40) for detecting an electrical value that depends on the current provided by the high frequency electronic ballast (26), and a ballast protection unit (60) for performing, in dependence of the detected electrical value, an operation for protecting the high frequency electronic ballast (26) from an overcurrent situation. This allows avoiding an unsafe situation, such as when the high frequency electronic ballast (26) is overheated.Type: ApplicationFiled: August 27, 2014Publication date: June 16, 2016Inventors: Borong SU, Bernhard Christiaan VAN DIJK, William Peter Mechtildis Marie JANS, Haimin TAO
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Publication number: 20160174326Abstract: The present invention relates to an LED retrofit lamp adapted for operation with an alternating current. The LED lamp comprises an LED unit, first and second switching devices (e.g., first and second relays), a startup voltage supply unit (1010) coupled in parallel to the first switching device, an ignition detection unit (1020) coupled in parallel to the second switching device, and a switch drive unit (1030) for setting the first and second switching devices to a conducting state. If one of the first and second switching devices is shorted either no startup supply voltage or no detection signal is provided, such that the failure is indicated externally to a user.Type: ApplicationFiled: August 18, 2014Publication date: June 16, 2016Inventors: BERNHARD CHRISTIAAN VAN DIJK, HAIMIN TAO, BORONG SU
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Patent number: 7365999Abstract: In an up-converter supplied by the mains supply and operating in the critical mode, the on-time of the switching element (2) is modulated so that it is increased in the vicinity of the zero crossings of the mains supply voltage. As a result the THD is lowered.Type: GrantFiled: May 24, 2004Date of Patent: April 29, 2008Assignee: Koninklijke Philips Electronics N.V.Inventors: Henri Arnoud Ignatius Melai, Johan Anton Hendrikx, Bernhard Christiaan Van Dijk, Paul Robert Veldman
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Publication number: 20070208090Abstract: The APPLICATION protects the production of a plurality of vessel-based gas-to liquids plants, at least identical in the conversion of natural gas into synthesis gas. The vessel can be a ship or a barge. The liquids made can be either hydrocarbons, made under Fischer-Tropsch type conditions, or oxygen-containing methanol or dimethyl-ether The given approach offers the possibility for a substantial income possibility, even at substantially increased natural gas costs.Type: ApplicationFiled: June 20, 2005Publication date: September 6, 2007Applicant: VAN DIJK TECHNOLOGIES, L.LC.Inventor: Christiaan van Dijk
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Patent number: 7259523Abstract: In a bride circuit comprising a lamp choke that might partially saturate during the ignition of the lamp, at least one of the switches is switched off when the amount of charge displaced through it in forward direction equals a predetermined value. Despite the partial paturation of the lamp choke the amplitude of the ignition voltage is thereby effectively controlled.Type: GrantFiled: January 14, 2004Date of Patent: August 21, 2007Assignee: Koninklijke Philips Electronics N.V.Inventors: Paul Robert Veldman, Bernhard Christiaan Van Dijk, Jianjun Yu