Patents by Inventor Carsten Deppe
Carsten Deppe 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: 8258713Abstract: Supply circuits for supplying voltage and current signals to light sources (6) comprise switches (22, 32, 42, 52) and controllers (21, 31, 41, 51) to control the switches (22, 32, 42, 52) for reducing values of frequency components of harmonic content of power spectra of the light sources (6). By switching one of the voltage and current signals or by switching signals that result in one of the voltage and current signals, the other one of the voltage and current signals can be adjusted. The power spectrum of the light source (6) may be a function of the voltage and current signals. By adjusting one of them, the power spectrum can be adjusted such that values of frequency components of the harmonic content of the power spectrum are reduced. As a result, visible flicker is reduced in the light originating from the light source (6) without the use of energy storage capacitors for reducing this visible flicker.Type: GrantFiled: June 23, 2008Date of Patent: September 4, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Carsten Deppe, Ulrich Boeke, Chenyang Liu, Peter Luerkens
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Patent number: 8217593Abstract: In this method an arc-length control value, indicating the current length of a discharge arc of the gas-discharge lamp (1), is monitored and the lamp (1) is driven in a first operation mode (OMP) with a first current wave-shape when the arc-length control value indicates that the arc-length is higher than a switching threshold, which first current wave-shape is selected to result in a tip (31) growing on an electrode (30) of the lamp (1), and the lamp (1) is driven in a second operation mode (OMn) with a second current wave-shape when the arc-length control value indicates that the arc-length is lower than a switching threshold, which second current wave-shape is selected such that the tip (31) on the electrode (30) is at least partly melted back.Type: GrantFiled: July 8, 2008Date of Patent: July 10, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Jens Pollmann-Retsch, John-john Pieter Jan Van Den Bergh, Uwe Mackens, Pavel Pekarski, Mark Carpaij, Carsten Deppe
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Publication number: 20120146544Abstract: In light emitting diode circuits (1) comprising serially coupled first and second circuits (11, 12) with first and second light emitting diodes, third circuits (13) are coupled in parallel with the second circuits (12) for controlling the first light emitting diodes in the first circuits (11) and/or third light emitting diodes in fourth circuits (14). This allows more options, more optimizations, more flexibility and/or more efficiency. The light emitting diode circuit (1) receives a supply voltage from a source (2, 3) for feeding the light emitting diode circuit (1). The third circuit (13) receives a feeding voltage from the second circuit (12) for feeding the third circuit (13). The feeding voltage may be a voltage present across the second circuit (12). The third circuit (13) may further control the second light emitting diodes in the second circuit (12).Type: ApplicationFiled: September 1, 2010Publication date: June 14, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Georg Sauerlaender, Carsten Deppe
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Publication number: 20120126714Abstract: Bleeder circuits (1) for combinations of phase cutting dimmers (2) and light emitting diode circuits (3) comprise active circuitry (4) to increase a number of options. The active circuitry (4) may comprise a current limiting circuit (5) for limiting a current flowing through the bleeder circuit (1). The active circuitry (4) may comprise a voltage detecting circuit (6) for activating or deactivating, in response to a detection result, the current limiting circuit (5) and may comprise control circuitry such as a micro processor circuit (7) for controlling the current limiting circuit (5) and may comprise a control circuit (9) for using information derived from a current flowing through the light emitting diode circuit (3) for controlling the current limiting circuit (5) and for controlling at least a part of the light emitting diode circuit (3) that comprises anti-parallel light emitting diodes (31-32) or serial and/or parallel light emitting diodes (33-36).Type: ApplicationFiled: July 27, 2010Publication date: May 24, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Carsten Deppe, Georg Sauerländer
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Publication number: 20120091906Abstract: Disclosed is a lighting device including a circuit including at least two parallel-connected light-emitting diodes of opposite pole in a first parallel branch and comprising at least two parallel-connected light-emitting diodes of opposite pole in a second parallel branch, and also including a capacitor and a coil. At least one of the diodes emits red light, blue light, and/or white light.Type: ApplicationFiled: December 22, 2011Publication date: April 19, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Carsten DEPPE, Matthias Wendt
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Publication number: 20120086702Abstract: The present invention relates to a method of operating a projection system comprising several solid state light sources (2, 3, 4) of different colour 13, 14, 15) and at least one spatial light modulator (1) having an array of switchable elements. Said array is illuminated by at least one of said light sources (2, 3, 4) for several illumination periods and is addressed such that the light is timely and spatially modulated to project images onto a screen. In the present method said light sources (2, 3, 4) are controlled to emit light modulated in amplitude (15) and/or time (18) during said illumination periods of said array. With the present method an increased greyscale resolution of the projection system can be achieved.Type: ApplicationFiled: December 19, 2011Publication date: April 12, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Carsten Deppe, Holger Mönch
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Publication number: 20120074791Abstract: To improve energy efficiencies, supply circuits (1) for supplying switch circuits (2) have first supply modes for receiving first amounts of input power from sources (7) and providing first amounts of output power to output circuits (5) comprising control parts (3) of the switch circuits (2) and have second supply modes for receiving second amounts of input power and providing second amounts of output power. The first amounts of output power are larger than the second amounts of output power. The second amounts of input power are larger than zero and smaller than amounts of switch power necessary for operating the switch circuits (2). The switch circuits (2) may comprise relays for switching loads (8). The first amounts of input power may arrive via main contacts of the relays. Switches (47) may switch output signal levels. The relays may be bistable relays.Type: ApplicationFiled: March 9, 2010Publication date: March 29, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Carsten Deppe, Mathias Wendt
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Patent number: 8106592Abstract: The invention describes a method of driving a discharge lamp (1), wherein a blackening value (N) is determined, which blackening value (N) represents a level of blackening of the interior of the lamp (1), and a recovery parameter (2, T) is calculate based on the blackening value (N). When the lamp power is increased above the saturation power level, the lamp (1) is driven according to the recovery parameter (2, T) for the duration of a specific recovery time. The invention further describes a driving arrangement (70, 70?), and a projector system (10) comprising a high-pressure discharge lamp (1) and such a driving arrangement (70, 70?).Type: GrantFiled: August 7, 2007Date of Patent: January 31, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Tom Munters, Pavel Pekarski, Carsten Deppe
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Patent number: 8084945Abstract: The invention relates to a circuit (2) comprising at least two parallel-connected light-emitting diodes (4, 5) opposite poled in a first parallel branch (12) and comprising at least two parallel-connected light-emitting diodes (6, 7) opposite poled in a second parallel branch (13), and also comprising a capacitor (8) and a coil (9). According to the invention, the first parallel branch (12) has a capacitor (8) and the second parallel branch (13) has the coil (9). On account of the capacitive parallel branch (10) and the inductive parallel branch (11), idle currents arise which are phase-shifted with respect to one another. The idle currents compensate one another and light changes of the oppositely-poled diode pairs take place at different points in time. A light current is then smoothed.Type: GrantFiled: June 3, 2005Date of Patent: December 27, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Carsten Deppe, Matthias Wendt
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Publication number: 20110309762Abstract: Converters (1) for supplying pulsed power to light sources (8) comprise switching parts (2) and controlling parts (3) for adapting switching parameters of the switching parts (2) for improving a performance. The switching part (2) may comprise first/second switches (41, 42) that are in first/second modes during a first time interval of a cycle and vice versa during a second time intervals of a cycle. A group of cycles results in a pulse of the pulsed power. A switching parameter such as the first time interval of a first cycle may be shortened to reduce overshoot. A switching parameter such as the second time interval of the first cycle may be shortened or lengthened. A switching parameter such as the second time interval of a last cycle may be lengthened or shortened to reduce overshoot. A third switch (93) for switching the light source (8) is activated and de-activated delayedly to improve transient behavior.Type: ApplicationFiled: February 23, 2010Publication date: December 22, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Carsten Deppe, Reinhold Elferich
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Patent number: 8067903Abstract: Disclosed is a method for driving a gas discharge lamp in at least two operation modes, including the step of applying an alternating voltage to the gas discharge lamp, the alternating voltage having a first polarity during a first time interval and a second polarity opposite to the first polarity during a second time interval. The first time interval and the second time interval are repeated alternately. During a second operation mode, the electrical power being provided to the gas discharge lamp is smaller compared to a first operation mode, and the duration of the first time interval is at least a multiple of the duration of the second time interval.Type: GrantFiled: February 9, 2007Date of Patent: November 29, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Carsten Deppe, Hendrik Anton Van Esveld, Tobias Georg Tolle
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Patent number: 8063586Abstract: Disclosed is a method of driving a discharge lamp, wherein a value of pressure in the lamp is determined during operation of the lamp at a dimmed power level, a correction factor is determined based on the dimmed power level pressure value, a required power value for a requested light output level is calculated using the correction factor, and the lamp is driven according to the required power value.Type: GrantFiled: February 21, 2007Date of Patent: November 22, 2011Assignee: Koninklijke Philips Electronics N.V.Inventor: Carsten Deppe
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Patent number: 8022644Abstract: Ignition of a gas discharge lamp 10, which has a gas containing main space and two inner electrodes, of a lighting unit 4 of a lighting system is achieved by the use of a high frequency resonance circuit. The resonance circuit is connected to the inner electrodes and to a supply device 2, which supplies an alternating supply voltage. An outer electrode 22 is arranged near one the inner electrodes and to a node of the resonance circuit. Upon supplying the supply voltage a high voltage alternating burst will be generated at the outer electrode. This will result into a discharge of the gas in the main space. In turn, this will induce a discharge of the remaining gas. Then the frequency of the supply voltage will increase and a small reactive current only will remain to flow through the resonance circuit.Type: GrantFiled: July 3, 2006Date of Patent: September 20, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Carsten Deppe, Peter Luerkens, Raul Duran
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Patent number: 8008872Abstract: The invention describes a method of shutting down a high pressure discharge lamp (1) in which a pair of electrodes (2) is disposed in an arc tube (3), which method comprises reducing, upon receipt of a shut-down request (SR), the lamp power (P) towards a reduced power level (PR) required to sustain a long-term arc discharge between the electrodes (2), and driving the lamp (1) towards the reduced power level (PR) for a reduced power duration before completely shutting down the lamp power (P), whereby, prior to reducing the lamp power (P) towards the reduced power level (PR), the lamp power (P) is reduced to an undershoot power level (Pu), which undershoot power level (Pu) is lower than the reduced power level (PR) required to sustain a long-term arc discharge between the electrodes (2), and the lamp is driven at this undershoot power level (Pu) for an undershoot power duration (tu) before increasing the lamp power (P) again to approach the reduced power level (PR).Type: GrantFiled: April 25, 2007Date of Patent: August 30, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Tobias Georg Tolle, Ludo Valere Maurice Schreel, Carsten Deppe
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Patent number: 7978743Abstract: A driver circuit for driving loads such as LED, OLED or LASER diode devices includes a switching converter that has a switching element and reactive elements to provide an output switching voltage by sequential switching operations of the switching element. The load is connected to the output switching voltage. A linear current driver circuit is connected in series to the load and includes an amplification element and a feedback circuit with a current control input. In order to enable the circuit to be easily used, a control unit is provided with a sensing input for a current or voltage at the linear current driver. A microcontroller executes a control program for processing the sensing input and providing both a current control output and a switching control output, set in accordance with a set current value.Type: GrantFiled: March 12, 2008Date of Patent: July 12, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Carsten Deppe, Matthias Wendt
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Publication number: 20110148317Abstract: A method for driving a high-pressure gas discharge lamp of a projector system, which is suitable to produce and to supply to a light valve device during a projection interval (4) a light beam of a basic color which is selected from several basic colors (G, R, B). The lamp is driven by a lamp current. During said projection interval light valves of the light valve device are controlled in a pulse width modulation manner to have each valve provide a respective wanted light integral over said projection interval. During at least one of a number of successive projection intervals associated with one basic color a magnitude of the lamp current is temporarily reduced for at least a time that all light valves can be controlled for said one basic color.Type: ApplicationFiled: March 3, 2011Publication date: June 23, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: CARSTEN DEPPE, HOLGER MOENCH, TOM MUNTERS, CHRISTOFHER DANIEL CHARLES HOOIJER
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Patent number: 7954961Abstract: A method for driving a high-pressure gas discharge lamp of a projector system, which is suitable to produce and to supply to a light valve device during a projection interval (4) a light beam of a basic color which is selected from several basic colors (G, R, B). The lamp is driven by a lamp current. During said projection interval light valves of the light valve device are controlled in a pulse width modulation manner to have each valve provide a respective wanted light integral over said projection interval. During at least one of a number of successive projection intervals associated with one basic color a magnitude of the lamp current is temporarily reduced for at least a time that all light valves can be controlled for said one basic color.Type: GrantFiled: June 26, 2006Date of Patent: June 7, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Carsten Deppe, Holger Moench, Tom Munters, Christofher Daniel Charles Hooijer
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Patent number: 7909473Abstract: There is described a method for operating a high-intensity discharge lamp (2), in which the high-intensity discharge lamp (2) is acted upon by an AC current (I) which commutates between positive pulses (Ip) and negative pulses (In) with a predefined current amplitude (IA), wherein a pulse width ratio between the pulse width of a positive pulse (Ip) and the pulse width of an adjacent negative pulse (In) is modulated in such a way that the mean current value (I) of two successive positive and negative pulses (Ip, In) fluctuates periodically between positive and negative values. In addition, the value of the current amplitude (IA) is modulated in accordance with a predefined modulation function (M). A description is also given of a corresponding lamp driver (10) for a high-intensity discharge lamp (2) and of a projection system (1) comprising such a lamp driver (10).Type: GrantFiled: September 1, 2006Date of Patent: March 22, 2011Assignee: Koninklijke Philips Electronics N.V.Inventor: Carsten Deppe
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Patent number: 7887196Abstract: A method for operating a projection system (1) is described, wherein a brightness level (B1, B2, B3, B4, B5, B6) in an image (IM) is represented by the total length of a number of light switch-on phases within a particular image cycle (VT). A high pressure discharge lamp (2) of the projection system (1) is operated via a lamp driver with an essentially square-wave alternating current (IL) SO that an overshoot sequence (0), which occurs in the alternating current (IL) after a current zero crossing during operation of the high pressure discharge lamp (2), has a frequency so high that for each possible brightness level at least one full period (P) of the overshoot sequence (0) lies essentially within a light switch-on or switch-off phase (ts) following the zero crossing. A projection system (1) and a lamp driver (10) for a high pressure discharge lamp (2) in such a projection system (1) are also described.Type: GrantFiled: April 21, 2006Date of Patent: February 15, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Carsten Deppe, Tom Munters, Christofher Daniel Charles Hooijer, Hans Feijen, Sander Habets
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Publication number: 20100325456Abstract: An average power consumption of receiving units (3,5,7) for controlling apparatuses (4,6,8) in response to operation control signals from transmitting units (2) may be reduced by introducing devices (1,21) for controlling the power consumption of the receiving units (3,5,7) in response to detections of states of the apparatuses (4,6,8). The devices (1) may comprise controllers (30) for controlling the power consumption in a wireless, non-wireless, physical and/or logical manner. The devices (1) may comprise monitors (33) for monitoring power consumption, currents and/or voltages at the receiving units (3,5,7) and/or the apparatuses (4,6,8).Type: ApplicationFiled: February 2, 2009Publication date: December 23, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Matthias Wendt, Bozena Erdmann, Carsten Deppe, Georg Sauerlaender