Patents by Inventor Dragan Veskovic

Dragan Veskovic 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).

  • Publication number: 20110115293
    Abstract: The invention regards a system and method for using a handheld programming device to configure a lighting control system wirelessly. In one embodiment, at least one device configured with a processing section is installed in the lighting control system. A communications receiver that is operable to receive a signal from the handheld programming device is also installed in the lighting control system, wherein the signal includes an instruction for configuring the lighting control system. Further, the signal is wirelessly sent from the handheld programming device to the communications receiver, and the instruction is transmitted from the communications receiver to a device in the system. The instruction functions to configure the lighting control system.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 19, 2011
    Applicant: LUTRON ELECTRONICS CO., INC.
    Inventors: Audwin W. Cash, Christopher J. Rigatti, Dragan Veskovic
  • Patent number: 7936281
    Abstract: The invention regards a system and method for using a handheld programming device to configure a lighting control system wirelessly. In one embodiment, at least one device configured with a processing section is installed in the lighting control system. A communications receiver that is operable to receive a signal from the handheld programming device is also installed in the lighting control system, wherein the signal includes an instruction for configuring the lighting control system. Further, the signal is wirelessly sent from the handheld programming device to the communications receiver, and the instruction is transmitted from the communications receiver to a device in the system. The instruction functions to configure the lighting control system.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: May 3, 2011
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Audwin W. Cash, Christopher J. Rigatti, Dragan Veskovic
  • Patent number: 7880638
    Abstract: A ballast for use in a multi-ballast lighting system wherein the ballasts are coupled together by a digital communication network. The ballast comprises a power circuit portion for providing an electrical current to power a lamp. The ballast further includes a sensor input circuit for receiving at least one sensor input from a sensor device, a processor receiving an input from the sensor input circuit and providing control signals to control the operation of the ballast, and a communication port coupled to the processor and to the communication network for exchanging data. The ballast processor is operative to receive a serial data that has a portion defining whether the message is in a first or a second format, the first format comprising a DALI standard format and the second format comprising a format providing extended functionality. The ballast processor is capable of processing messages in either the first or second formats.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: February 1, 2011
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Dragan Veskovic, Robert Anselmo, Audwin W. Cash, Matthew A. Skvoretz
  • Patent number: 7843139
    Abstract: An electronic dimming ballast comprises a filament turn-off circuit for controlling the magnitudes of filament voltages supplied to the filaments of a gas discharge lamp. Each of a plurality of filament windings is directly coupled to one of the filaments and is operable to supply a small AC filament voltage to the filaments. The plurality of filament windings and a control winding are loosely magnetically coupled to a resonant inductor of an output circuit of the ballast. A controllably conductive device is coupled across the control winding. When the controllably conductive device is conductive, the voltage across the control winding and the filament windings falls to zero volts. The controllably conductive device is driven with a pulse-width modulated (PWM) signal so as to control the magnitudes of the filament voltages. The filament voltages are provided to the filaments before striking the lamp, and when dimming the lamp near low end.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: November 30, 2010
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Brent Gawrys, Jecko J. Arakkal, Mark S. Taipale, Dragan Veskovic, Mark Charles Fischer
  • Patent number: 7825609
    Abstract: An electronic ballast for driving a gas discharge lamp includes a rectifier to convert an AC mains input voltage to a rectified voltage, a filter circuit for producing a DC bus voltage, an inverter for converting the bus voltage to a high-frequency AC voltage for driving the lamp, an output circuit for supplying an essentially sinusoidal voltage to the lamp, a control circuit for controlling the inverter, and a flyback cat-ear power supply for powering the control circuit. The power supply supplies current to the inverter when the rectified voltage is less than a predetermined level, and draws current only when the inverter is not drawing current directly from the AC mains, so as to make the input current to the ballast substantially sinusoidal. The ballast thus has substantially improved power factor and THD, and operates more efficiently.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: November 2, 2010
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Mark S. Taipale, Venkatesh Chitta, Dragan Veskovic
  • Publication number: 20100246082
    Abstract: A communication circuit for an electronic dimming ballast provides high-voltage miswire protection and improved rise and fall times of a transmitted digital signal. The electronic dimming ballast comprises a control circuit, which is coupled to a digital communication link, for example, a DALI communication link, via the communication circuit. The communication circuit comprises a receiving circuit for detecting when the digital ballast communication link is shorted and for providing a received digital message to the control circuit. The communication circuit also comprises a transmitting circuit for shorting the communication link in response to the control circuit. The communication circuit also includes a high-voltage fault protection circuit for protecting the circuitry of the communication circuit if the communication circuit high-voltage mains voltages. The communication circuit is operable to reliably transmit digital messages having improved rise and fall times.
    Type: Application
    Filed: June 15, 2010
    Publication date: September 30, 2010
    Applicant: LUTRON ELECTRONICS CO., INC.
    Inventors: Venkatesh Chitta, Elik Dvorkin, Dragan Veskovic
  • Publication number: 20100238001
    Abstract: A method of automatically programming a new load control device that replaces an old load control device takes advantage of a remote identification tag (e.g., an RFID tag) located in the vicinity of the old device. The remote identification tag stores an identifier that is representative of a location in which the old device is installed. The method includes the steps of: (1) storing a setting of an old device in a memory of a controller; (2) associating the setting with the identifier of the old device in the memory of the controller; (3) the new device retrieving the identifier from the remote identification tag after the new device is installed in the location of the old device; (4) the new device transmitting the identifier to the controller; and (5) the controller transmitting the setting of the old device to the new device in response to receiving the identifier.
    Type: Application
    Filed: March 5, 2010
    Publication date: September 23, 2010
    Applicant: LUTRON ELECTRONICS CO., INC.
    Inventor: Dragan Veskovic
  • Patent number: 7764479
    Abstract: A communication circuit for an electronic dimming ballast provides high-voltage miswire protection and improved rise and fall times of a transmitted digital signal. The electronic dimming ballast comprises a control circuit, which is coupled to a digital communication link, for example, a DALI communication link, via the communication circuit. The communication circuit comprises a receiving circuit for detecting when the digital ballast communication link is shorted and for providing a received digital message to the control circuit. The communication circuit also comprises a transmitting circuit for shorting the communication link in response to the control circuit. The communication circuit also includes a high-voltage fault protection circuit for protecting the circuitry of the communication circuit if the communication circuit high-voltage mains voltages. The communication circuit is operable to reliably transmit digital messages having improved rise and fall times.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: July 27, 2010
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Venkatesh Chitta, Elik Dvorkin, Dragan Veskovic
  • Patent number: 7764162
    Abstract: The invention regards a system and method for using a handheld programming device to configure a lighting control system wirelessly. In one embodiment, at least one device configured with a processing section is installed in the lighting control system. A communications receiver that is operable to receive a signal from the handheld programming device is also installed in the lighting control system, wherein the signal includes an instruction for configuring the lighting control system. Further, the signal is wirelessly sent from the handheld programming device to the communications receiver, and the instruction is transmitted from the communications receiver to a device in the system. The instruction functions to configure the lighting control system.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: July 27, 2010
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Audwin W. Cash, Rishi Raj Kumar, Christopher J. Rigatti, Dragan Veskovic, John C. Hewson
  • Publication number: 20100117621
    Abstract: A method of determining a setpoint of a load control device for controlling the amount of power delivered to an electrical load located in a space, the method comprising the steps of initially setting the value of the setpoint equal to a desired level; limiting the value of the setpoint to an occupied high-end trim if the space is occupied; limiting the value of the setpoint to a daylighting high-end trim determined by a daylighting procedure; and subsequently reducing the value of the setpoint in response to a load shed parameter.
    Type: Application
    Filed: January 20, 2010
    Publication date: May 13, 2010
    Applicant: LUTRON ELECTRONICS CO., INC.
    Inventors: Dragan Veskovic, Audwin Cash, Christopher J. Rigatti
  • Publication number: 20100117620
    Abstract: A method of determining a setpoint of a load control device for controlling the amount of power delivered to an electrical load located in a space, the method comprising the steps of initially setting the value of the setpoint equal to a desired level; limiting the value of the setpoint to an occupied high-end trim if the space is occupied; limiting the value of the setpoint to a daylighting high-end trim determined by a daylighting procedure; and subsequently reducing the value of the setpoint in response to a load shed parameter.
    Type: Application
    Filed: January 20, 2010
    Publication date: May 13, 2010
    Applicant: LUTRON ELECTRONICS CO., INC.
    Inventors: Dragan Veskovic, Audwin Cash, Christopher J. Rigatti
  • Publication number: 20100006241
    Abstract: A system for reducing sun glare through an opening into a space, the system comprising an electrically controllable window treatment operable to alter the amount of daylight entering the space through the opening; a first sensor mounted within the space and characterized by a sensor gain, the first sensor operable to sense a level of illumination in the space; and a control system operable: to compare the sensed illumination level in the space to a dead-band having upper and lower thresholds; to adjust during a time period when glare from the sun can occur through the opening at least one of: (a) the upper threshold of the dead-band, (b) the lower threshold of the dead-band, and (c) the sensor gain of the first sensor; and to adjust the window treatment in response to the sensed level of illumination to reduce the sun glare.
    Type: Application
    Filed: August 14, 2009
    Publication date: January 14, 2010
    Inventor: Dragan Veskovic
  • Publication number: 20090301672
    Abstract: A system for reducing sun glare through an opening into a space, the system comprising an electrically controllable window treatment operable to alter the amount of daylight entering the space through the opening; a first sensor mounted within the space and characterized by a sensor gain, the first sensor operable to sense a level of illumination in the space; and a control system operable: to compare the sensed illumination level in the space to a dead-band having upper and lower thresholds; to adjust during a time period when glare from the sun can occur through the opening at least one of: (a) the upper threshold of the dead-band, (b) the lower threshold of the dead-band, and (c) the sensor gain of the first sensor; and to adjust the window treatment in response to the sensed level of illumination to reduce the sun glare.
    Type: Application
    Filed: August 14, 2009
    Publication date: December 10, 2009
    Inventor: Dragan Veskovic
  • Patent number: 7619539
    Abstract: A ballast having a microprocessor embedded therein is controlled via four inputs. The ballast includes a high-voltage phase-controlled signal provided by a dimmer and an infrared (IR) receiver through which the ballast can receive data signals from an IR transmitter. The ballast can also receive commands from other ballasts or a master control on the serial digital communication link, such as a DALI protocol link. The fourth input is an analog signal, which is simply a DC signal that linearly ranges in value from a predetermined lower limit to a predetermined upper limit, corresponding to the 0% to 100% dimming range of the load. The output stage of the ballast includes one or more FETs, which are used to control the current flow to the lamp. Based on these inputs, the microprocessor makes a decision on the intensity levels of the load and directly drives the FETs in the output stage.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: November 17, 2009
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Dragan Veskovic, Robert A. Anselmo, Mark Taipale, Matthew Skvoretz, Joel S. Spira
  • Publication number: 20090273286
    Abstract: A ballast having a microprocessor embedded therein is controlled via four inputs. The ballast includes a high-voltage phase-controlled signal provided by a dimmer and an infrared (IR) receiver through which the ballast can receive data signals from an IR transmitter. The ballast can also receive commands from other ballasts or a master control on the serial digital communication link, such as a DALI protocol link. The fourth input is an analog signal, which is simply a DC signal that linearly ranges in value from a predetermined lower limit to a predetermined upper limit, corresponding to the 0% to 100% dimming range of the load. The output stage of the ballast includes one or more FETs, which are used to control the current flow to the lamp. Based on these inputs, the microprocessor makes a decision on the intensity levels of the load and directly drives the FETs in the output stage.
    Type: Application
    Filed: July 15, 2009
    Publication date: November 5, 2009
    Applicant: LUTRON ELECTRONICS CO., INC.
    Inventors: Dragan Veskovic, Robert A. Anselmo, Mark Taipale, Matthew Skvoretz, Joel S. Spira
  • Publication number: 20090273296
    Abstract: A ballast having a microprocessor embedded therein is controlled via four inputs. The ballast includes a high-voltage phase-controlled signal provided by a dimmer and an infrared (IR) receiver through which the ballast can receive data signals from an IR transmitter. The ballast can also receive commands from other ballasts or a master control on the serial digital communication link, such as a DALI protocol link. The fourth input is an analog signal, which is simply a DC signal that linearly ranges in value from a predetermined lower limit to a predetermined upper limit, corresponding to the 0% to 100% dimming range of the load. The output stage of the ballast includes one or more FETs, which are used to control the current flow to the lamp. Based on these inputs, the microprocessor makes a decision on the intensity levels of the load and directly drives the FETs in the output stage.
    Type: Application
    Filed: July 15, 2009
    Publication date: November 5, 2009
    Applicant: Lutron Electronics Co., Inc.
    Inventors: Dragan Veskovic, Robert A. Anselmo, Mark Taipale, Matthew Skvoretz, Joel S. Spira
  • Publication number: 20090273299
    Abstract: An electronic dimming ballast comprises a filament turn-off circuit for controlling the magnitudes of filament voltages supplied to the filaments of a gas discharge lamp. Each of a plurality of filament windings is directly coupled to one of the filaments and is operable to supply a small AC filament voltage to the filaments. The plurality of filament windings and a control winding are loosely magnetically coupled to a resonant inductor of an output circuit of the ballast. A controllably conductive device is coupled across the control winding. When the controllably conductive device is conductive, the voltage across the control winding and the filament windings falls to zero volts. The controllably conductive device is driven with a pulse-width modulated (PWM) signal so as to control the magnitudes of the filament voltages. The filament voltages are provided to the filaments before striking the lamp, and when dimming the lamp near low end.
    Type: Application
    Filed: July 6, 2009
    Publication date: November 5, 2009
    Applicant: LUTRON ELECTRONICS CO., INC.
    Inventors: Brent Gawrys, Jecko J. Arakkal, Mark S. Taipale, Dragan Veskovic, Mark Charles Fischer
  • Patent number: 7588067
    Abstract: A system for reducing sun glare through an opening into a space, the system comprising an electrically controllable window treatment operable to alter the amount of daylight entering the space through the opening; a first sensor mounted within the space and characterized by a sensor gain, the first sensor operable to sense a level of illumination in the space; and a control system operable: to compare the sensed illumination level in the space to a dead-band having upper and lower thresholds; to adjust during a time period when glare from the sun can occur through the opening at least one of: (a) the upper threshold of the dead-band, (b) the lower threshold of the dead-band, and (c) the sensor gain of the first sensor; and to adjust the window treatment in response to the sensed level of illumination to reduce the sun glare.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: September 15, 2009
    Assignee: Lutron Electronics Co., Inc.
    Inventor: Dragan Veskovic
  • Patent number: 7586268
    Abstract: An electronic dimming ballast comprises a filament turn-off circuit for controlling the magnitudes of filament voltages supplied to the filaments of a gas discharge lamp. Each of a plurality of filament windings is directly coupled to one of the filaments and is operable to supply a small AC filament voltage to the filaments. The plurality of filament windings and a control winding are loosely magnetically coupled to a resonant inductor of an output circuit of the ballast. A controllably conductive device is coupled across the control winding. When the controllably conductive device is conductive, the voltage across the control winding and the filament windings falls to zero volts. The controllably conductive device is driven with a pulse-width modulated (PWM) signal so as to control the magnitudes of the filament voltages. The filament voltages are provided to the filaments before striking the lamp, and when dimming the lamp near low end.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: September 8, 2009
    Assignee: Lutron Electronics Co., Inc.
    Inventors: Brent Gawrys, Jecko J. Arakkal, Mark S. Taipale, Dragan Veskovic, Mark Charles Fischer
  • Patent number: 7566137
    Abstract: An illumination maintenance system for maintaining a desired illumination profile in a space throughout at least a portion of a day, the space being illuminable by both daylight and electric light, the system comprising a sensor for sensing an illumination level in at least a portion of the space; a plurality of dimmable electric lamps providing the electric light to supplement the daylight illumination of the space, the electric lamps arranged in one or more zones in the space, the zones defining predefined volumes of the space, each zone having at least one lamp; a control system controlling the dimming levels of the plurality of electric lamps, the at least one lamp of each zone being controlled to a dimming level to achieve a desired illumination level in the respective zone according to the desired illumination profile and compensate for the daylight illumination in the space throughout at least the portion of the day; wherein the dimming level of each lamp is selected by the control system from one of a
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: July 28, 2009
    Assignee: Lutron Electronics Co., Inc.
    Inventor: Dragan Veskovic