Patents by Inventor Venkatesh Chitta
Venkatesh Chitta 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: 20240120829Abstract: A load control device for controlling power delivered from an AC power source to an electrical load may have a closed-loop gate drive circuit for controlling a semiconductor switch of a controllably conductive device. The controllably conductive device may be coupled in series between the source and the load. The gate drive circuit may generate a target signal in response to a control circuit. The gate drive circuit may shape the target signal over a period of time and may increase the target signal to a predetermined level after the period of time. The gate drive circuit may receive a feedback signal that indicates a magnitude of a load current conducted through the semiconductor switch. The gate drive circuit may generate a gate control signal in response to the target signal and the feedback signal, and render the semiconductor switch conductive and non-conductive in response to the gate control signal.Type: ApplicationFiled: December 20, 2023Publication date: April 11, 2024Applicant: Lutron Technology Company LLCInventors: Brian J. Bollinger, Venkatesh Chitta, Firozbabu Cholashari, Jonathan Waldron
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Patent number: 11894764Abstract: A load control device for controlling power delivered from an AC power source to an electrical load may have a closed-loop gate drive circuit for controlling a semiconductor switch of a controllably conductive device. The controllably conductive device may be coupled in series between the source and the load. The gate drive circuit may generate a target signal in response to a control circuit. The gate drive circuit may shape the target signal over a period of time and may increase the target signal to a predetermined level after the period of time. The gate drive circuit may receive a feedback signal that indicates a magnitude of a load current conducted through the semiconductor switch. The gate drive circuit may generate a gate control signal in response to the target signal and the feedback signal, and render the semiconductor switch conductive and non-conductive in response to the gate control signal.Type: GrantFiled: December 27, 2022Date of Patent: February 6, 2024Assignee: Lutron Technology Company LLCInventors: Brian J. Bollinger, Venkatesh Chitta, Firozbabu Cholashari, Jonathan Waldron
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Publication number: 20230319962Abstract: A method for controlling an amount of power delivered to an electrical load may include controlling an average magnitude of a load current towards a target load current that ranges from a maximum-rated current to a minimum-rated current in a normal mode, and controlling the average magnitude of the load current below the minimum-rated current in a burst mode. The burst mode may include at least one burst-mode period that comprises a first time period associated with an active state and a second time period associated with an inactive state. During the burst mode, the method may include regulating a peak magnitude of the load current towards the minimum-rated current during the active state, and stopping the generation of at least one drive signal during the inactive state to control the average magnitude of the load current to be less than the minimum-rated current.Type: ApplicationFiled: June 6, 2023Publication date: October 5, 2023Applicant: Lutron Technology Company LLCInventors: Venkatesh Chitta, Jeffrey S. Hayes, Robert D. Stevens, JR.
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Publication number: 20230239978Abstract: A lighting control system for controlling a cumulative light emitted by a lighting fixture having a plurality of LED light sources may comprise a plurality of LED drivers adapted to be coupled to a respective one of the LED light sources and configured to control an intensity of the respective LED light source, and a controller configured to transmit a single digital message for controlling the cumulative light emitted by the lighting fixture. Each of the plurality of LED drivers is configured to adjust the intensity of the respective LED light source to a preset intensity in response to the single digital message transmitted by the controller.Type: ApplicationFiled: March 30, 2023Publication date: July 27, 2023Applicant: Lutron Technology Company LLCInventors: Venkatesh Chitta, Arya Abraham
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Patent number: 11711875Abstract: A method for controlling an amount of power delivered to an electrical load may include controlling an average magnitude of a load current towards a target load current that ranges from a maximum-rated current to a minimum-rated current in a normal mode, and controlling the average magnitude of the load current below the minimum-rated current in a burst mode. The burst mode may include at least one burst-mode period that comprises a first time period associated with an active state and a second time period associated with an inactive state. During the burst mode, the method may include regulating a peak magnitude of the load current towards the minimum-rated current during the active state, and stopping the generation of at least one drive signal during the inactive state to control the average magnitude of the load current to be less than the minimum-rated current.Type: GrantFiled: April 25, 2022Date of Patent: July 25, 2023Assignee: Lutron Technology Company LLCInventors: Venkatesh Chitta, Jeffrey S. Hayes, Robert D. Stevens, Jr.
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Publication number: 20230125864Abstract: A load control device for controlling power delivered from an AC power source to an electrical load may have a closed-loop gate drive circuit for controlling a semiconductor switch of a controllably conductive device. The controllably conductive device may be coupled in series between the source and the load. The gate drive circuit may generate a target signal in response to a control circuit. The gate drive circuit may shape the target signal over a period of time and may increase the target signal to a predetermined level after the period of time. The gate drive circuit may receive a feedback signal that indicates a magnitude of a load current conducted through the semiconductor switch. The gate drive circuit may generate a gate control signal in response to the target signal and the feedback signal, and render the semiconductor switch conductive and non-conductive in response to the gate control signal.Type: ApplicationFiled: December 27, 2022Publication date: April 27, 2023Applicant: Lutron Technology Company LLCInventors: Brian J. Bollinger, Venkatesh Chitta, Firozbabu Cholashari, Jonathan Waldron
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Patent number: 11622427Abstract: A lighting control system for controlling a cumulative light emitted by a lighting fixture having a plurality of LED light sources may comprise a plurality of LED drivers adapted to be coupled to a respective one of the LED light sources and configured to control an intensity of the respective LED light source, and a controller configured to transmit a single digital message for controlling the cumulative light emitted by the lighting fixture. Each of the plurality of LED drivers is configured to adjust the intensity of the respective LED light source to a preset intensity in response to the single digital message transmitted by the controller.Type: GrantFiled: March 21, 2022Date of Patent: April 4, 2023Assignee: Lutron Technology Company LLCInventors: Venkatesh Chitta, Arya Abraham
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Publication number: 20230072726Abstract: Methods and systems may be used for controlling the color temperature of one or more light sources (e.g., discrete-spectrum light sources) based on fixture capability information. Fixture capability information may be obtained using a configuration tool. The fixture capability information may be determined by the configuration tool, and the fixture capability information determined by the configuration tool may be stored and/or processed. The fixture may have a memory for storing the fixture capability information. The fixture capability information may also be stored in a remote network device. A system controller may obtain the fixture capability information from the fixture or the remote control device. The system controller may generate control instructions based on the fixture capability information and send the control instructions to the fixtures.Type: ApplicationFiled: November 14, 2022Publication date: March 9, 2023Applicant: Lutron Technology Company LLCInventors: Ethan Charles Biery, Craig Alan Casey, Venkatesh Chitta, Brent Protzman, Thomas M. Shearer, Mark S. Taipale
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Patent number: 11569733Abstract: A load control device for controlling power delivered from an AC power source to an electrical load may have a closed-loop gate drive circuit for controlling a semiconductor switch of a controllably conductive device. The controllably conductive device may be coupled in series between the source and the load. The gate drive circuit may generate a target signal in response to a control circuit. The gate drive circuit may shape the target signal over a period of time and may increase the target signal to a predetermined level after the period of time. The gate drive circuit may receive a feedback signal that indicates a magnitude of a load current conducted through the semiconductor switch. The gate drive circuit may generate a gate control signal in response to the target signal and the feedback signal, and render the semiconductor switch conductive and non-conductive in response to the gate control signal.Type: GrantFiled: May 15, 2020Date of Patent: January 31, 2023Assignee: Lutron Technology Company LLCInventors: Brian J. Bollinger, Venkatesh Chitta, Firozbabu Cholashari, Jonathan Waldron
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Patent number: 11503682Abstract: Methods and systems may be used for controlling the color temperature of one or more light sources (e.g., discrete-spectrum light sources) based on fixture capability information. Fixture capability information may be obtained using a configuration tool. The fixture capability information may be determined by the configuration tool, and the fixture capability information determined by the configuration tool may be stored and/or processed. The fixture may have a memory for storing the fixture capability information. The fixture capability information may also be stored in a remote network device. A system controller may obtain the fixture capability information from the fixture or the remote control device. The system controller may generate control instructions based on the fixture capability information and send the control instructions to the fixtures.Type: GrantFiled: October 27, 2020Date of Patent: November 15, 2022Assignee: Lutron Technology Company LLCInventors: Ethan Charles Biery, Craig Alan Casey, Venkatesh Chitta, Brent Protzman, Thomas M. Shearer, Mark S. Taipale
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Publication number: 20220256669Abstract: A method for controlling an amount of power delivered to an electrical load may include controlling an average magnitude of a load current towards a target load current that ranges from a maximum-rated current to a minimum-rated current in a normal mode, and controlling the average magnitude of the load current below the minimum-rated current in a burst mode. The burst mode may include at least one burst-mode period that comprises a first time period associated with an active state and a second time period associated with an inactive state. During the burst mode, the method may include regulating a peak magnitude of the load current towards the minimum-rated current during the active state, and stopping the generation of at least one drive signal during the inactive state to control the average magnitude of the load current to be less than the minimum-rated current.Type: ApplicationFiled: April 25, 2022Publication date: August 11, 2022Applicant: Lutron Technology Company LLCInventors: Venkatesh Chitta, Jeffrey S. Hayes, Robert D. Stevens, JR.
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Publication number: 20220210883Abstract: A lighting control system for controlling a cumulative light emitted by a lighting fixture having a plurality of LED light sources may comprise a plurality of LED drivers adapted to be coupled to a respective one of the LED light sources and configured to control an intensity of the respective LED light source, and a controller configured to transmit a single digital message for controlling the cumulative light emitted by the lighting fixture. Each of the plurality of LED drivers is configured to adjust the intensity of the respective LED light source to a preset intensity in response to the single digital message transmitted by the controller.Type: ApplicationFiled: March 21, 2022Publication date: June 30, 2022Applicant: Lutron Technology Company LLCInventors: Venkatesh Chitta, Arya Abraham
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Patent number: 11317491Abstract: A method for controlling an amount of power delivered to an electrical load may include controlling an average magnitude of a load current towards a target load current that ranges from a maximum-rated current to a minimum-rated current in a normal mode, and controlling the average magnitude of the load current below the minimum-rated current in a burst mode. The burst mode may include at least one burst-mode period that comprises a first time period associated with an active state and a second time period associated with an inactive state. During the burst mode, the method may include regulating a peak magnitude of the load current towards the minimum-rated current during the active state, and stopping the generation of at least one drive signal during the inactive state to control the average magnitude of the load current to be less than the minimum-rated current.Type: GrantFiled: March 29, 2021Date of Patent: April 26, 2022Assignee: Lutron Technology Company LLCInventors: Venkatesh Chitta, Jeffrey S. Hayes, Robert D. Stevens, Jr.
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Patent number: 11284485Abstract: A lighting control system for controlling a cumulative light emitted by a lighting fixture having a plurality of LED light sources may comprise a plurality of LED drivers adapted to be coupled to a respective one of the LED light sources and configured to control an intensity of the respective LED light source, and a controller configured to transmit a single digital message for controlling the cumulative light emitted by the lighting fixture. Each of the plurality of LED drivers is configured to adjust the intensity of the respective LED light source to a preset intensity in response to the single digital message transmitted by the controller.Type: GrantFiled: August 3, 2020Date of Patent: March 22, 2022Assignee: Lutron Technology Company LLCInventors: Venkatesh Chitta, Arya Abraham
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Publication number: 20210219399Abstract: A method for controlling an amount of power delivered to an electrical load may include controlling an average magnitude of a load current towards a target load current that ranges from a maximum-rated current to a minimum-rated current in a normal mode, and controlling the average magnitude of the load current below the minimum-rated current in a burst mode. The burst mode may include at least one burst-mode period that comprises a first time period associated with an active state and a second time period associated with an inactive state. During the burst mode, the method may include regulating a peak magnitude of the load current towards the minimum-rated current during the active state, and stopping the generation of at least one drive signal during the inactive state to control the average magnitude of the load current to be less than the minimum-rated current.Type: ApplicationFiled: March 29, 2021Publication date: July 15, 2021Applicant: Lutron Technology Company LLCInventors: Venkatesh Chitta, Jeffrey S. Hayes, Robert D. Stevens, JR.
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Patent number: 10966299Abstract: A method for controlling an amount of power delivered to an electrical load may include controlling an average magnitude of a load current towards a target load current that ranges from a maximum rated current to a minimum rated current in a normal mode, and controlling the average magnitude of the load current below the minimum rated current in a burst mode. The burst mode may include at least one burst mode period that comprises a first time period associated with an active state and a second time period associated with an inactive state. During the burst mode, the method may include regulating a peak magnitude of the load current towards the minimum rated current during the active state, and stopping the generation of at least one drive signal during the inactive state to control the average magnitude of the load current to be less than the minimum rated current.Type: GrantFiled: May 8, 2020Date of Patent: March 30, 2021Assignee: Lutron Technology Company LLCInventors: Venkatesh Chitta, Jeffrey S. Hayes, Robert D. Stevens, Jr.
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Publication number: 20210045208Abstract: Methods and systems may be used for controlling the color temperature of one or more light sources (e.g., discrete-spectrum light sources) based on fixture capability information. Fixture capability information may be obtained using a configuration tool. The fixture capability information may be determined by the configuration tool, and the fixture capability information determined by the configuration tool may be stored and/or processed. The fixture may have a memory for storing the fixture capability information. The fixture capability information may also be stored in a remote network device. A system controller may obtain the fixture capability information from the fixture or the remote control device. The system controller may generate control instructions based on the fixture capability information and send the control instructions to the fixtures.Type: ApplicationFiled: October 27, 2020Publication date: February 11, 2021Applicant: Lutron Technology Company LLCInventors: Ethan Charles Biery, Craig Alan Casey, Venkatesh Chitta, Brent Protzman, Thomas M. Shearer, Mark S. Taipale
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Publication number: 20210022222Abstract: A lighting control system for controlling a cumulative light emitted by a lighting fixture having a plurality of LED light sources may comprise a plurality of LED drivers adapted to be coupled to a respective one of the LED light sources and configured to control an intensity of the respective LED light source, and a controller configured to transmit a single digital message for controlling the cumulative light emitted by the lighting fixture. Each of the plurality of LED drivers is configured to adjust the intensity of the respective LED light source to a preset intensity in response to the single digital message transmitted by the controller.Type: ApplicationFiled: August 3, 2020Publication date: January 21, 2021Applicant: Lutron Technology Company LLCInventors: Venkatesh Chitta, Arya Abraham
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Publication number: 20200366188Abstract: A load control device for controlling power delivered from an AC power source to an electrical load may have a closed-loop gate drive circuit for controlling a semiconductor switch of a controllably conductive device. The controllably conductive device may be coupled in series between the source and the load. The gate drive circuit may generate a target signal in response to a control circuit. The gate drive circuit may shape the target signal over a period of time and may increase the target signal to a predetermined level after the period of time. The gate drive circuit may receive a feedback signal that indicates a magnitude of a load current conducted through the semiconductor switch. The gate drive circuit may generate a gate control signal in response to the target signal and the feedback signal, and render the semiconductor switch conductive and non-conductive in response to the gate control signal.Type: ApplicationFiled: May 15, 2020Publication date: November 19, 2020Applicant: Lutron Technology Company LLCInventors: Brian J. Bollinger, Venkatesh Chitta, Firozbabu Cholashari, Jonathan Waldron
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Patent number: 10827578Abstract: Methods and systems may be used for controlling the color temperature of one or more light sources (e.g., discrete-spectrum light sources) based on fixture capability information. Fixture capability information may be obtained using a configuration tool. The fixture capability information may be determined by the configuration tool, and the fixture capability information determined by the configuration tool may be stored and/or processed. The fixture may have a memory for storing the fixture capability information. The fixture capability information may also be stored in a remote network device. A system controller may obtain the fixture capability information from the fixture or the remote control device. The system controller may generate control instructions based on the fixture capability information and send the control instructions to the fixtures.Type: GrantFiled: August 16, 2019Date of Patent: November 3, 2020Assignee: Lutron Technology Company LLCInventors: Ethan Charles Biery, Craig Alan Casey, Venkatesh Chitta, Brent Protzman, Thomas M. Shearer, Mark S. Taipale