Patents by Inventor Raman Nair Harish Gopala Pillai
Raman Nair Harish Gopala Pillai 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: 20230018632Abstract: An occupancy sensor device may comprise a lens having a rated focal length, the lens to refract infrared radiation to converge at a point at the rated focal length; a passive infrared (PIR) sensor comprising detecting elements; and a body coupled with the lens and the PIR sensor to fix a distance between the lens and the PIR sensor, wherein the distance is less than a rated focal length of the lens and between the rated focal length of the lens and the lens, and the detecting elements of the PIR sensor are positioned to capture infrared radiation refracted by the lens. Some embodiments comprise a PIR sensor comprising an exposure area to capture infrared radiation incident to the exposure area; the PIR sensor comprising a first circuit board and a second circuit board coupled with the PIR sensor, the second circuit board perpendicular to the first circuit board.Type: ApplicationFiled: July 15, 2021Publication date: January 19, 2023Applicant: LEVITON MANUFACTURING CO., INC.Inventors: Vikas Asthana, Yuming Qin, Raman Nair Harish Gopala Pillai
-
Publication number: 20220166251Abstract: Embodiments may include a control device comprising an antenna; a near-field communications (NFC) module coupled with the antenna; a power storage coupled with the NFC module to harvest energy from a radio frequency (RF) field; and a wireless communications interface coupled with the power storage to receive power to generate and transmit a non-NFC radio transmission in response to the energy harvested from the RF field. Further embodiments may include a processor of the wireless communications interface to decrement a dim level in response to energy harvested from the RF field via a first antenna and to increment the dim level in response to energy harvested from the RF field via a second antenna. The wireless communications interface may then generate and transmit a non-NFC radio transmission to change the dim level.Type: ApplicationFiled: November 23, 2021Publication date: May 26, 2022Inventor: Raman Nair Harish Gopala Pillai
-
Patent number: 10356869Abstract: External programming of at least one processor (30) of a LED driver (10). In a normal operation mode a first control input (22B/22C) of the LED driver (10) may be provided to a first processor input of the processor and a second control input (22B/22C) of the LED driver may be provided to a second processor input of the processor (30). In a programming mode the first and second control inputs (22B, 22C) may be provided to programming inputs of the processor (30) to thereby enable programming of the processor (30) via the first and second control inputs (22B, 22C).Type: GrantFiled: January 12, 2017Date of Patent: July 16, 2019Assignee: SIGNIFY HOLDING B.V.Inventors: Raman Nair Harish Gopala Pillai, Kaustuva Acharya
-
Publication number: 20180302971Abstract: A lighting driver (500) includes a controller (560) which controls the lighting driver to selectively operate in one of two different states, including a first state (850) wherein the output current is substantially constant regardless of the RMS value of an AC Mains in put voltage (15) applied across AC Mains connection terminals (502), and a second state (860) wherein the slope of the input impedance across the AC Mains connection terminals is maintained to be positive regardless of the AC Mains input voltage. The controller is configured to latch the lighting driver into the second state whenever the RMS value of the AC Mains voltage is less than a minimum RMS threshold voltage for a time period greater than a first threshold time period (TTHRESHOLD_1), or greater than a maximum RMS threshold voltage for a time period greater than a second threshold time period (TTHRESHOLD_2).Type: ApplicationFiled: May 20, 2016Publication date: October 18, 2018Inventors: BERND CLAUBERG, ALEJANDRO LOPEZ, RAMAN NAIR HARISH GOPALA PILLAI
-
Patent number: 9854651Abstract: A programmable lighting device includes a power stage, a controller, a nonvolatile memory and a near field communication device. The power stage is configured to receive power from an external supply and supplying power to at least one light source. The controller is configured to control operation of the power stage according to an operating parameter and/or configuration setting for the programmable lighting device. The nonvolatile memory device stores the operating parameter and/or configuration setting. The near field communication device receives a radio frequency signal which communicates the operating parameter and/or configuration setting, and in response thereto stores the operating parameter and/or configuration setting in the nonvolatile memory. The near field communication device generates a supply voltage for powering the nonvolatile memory device from the RF signal.Type: GrantFiled: January 6, 2017Date of Patent: December 26, 2017Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Bing Lai, Bernd Clauberg, Raman Nair Harish Gopala Pillai, Alan James Marble
-
Publication number: 20170142799Abstract: External programming of at least one processor (30) of a LED driver (10). In a normal operation mode a first control input (22B/22C) of the LED driver (10) may be provided to a first processor input of the processor and a second control input (22B/22C) of the LED driver may be provided to a second processor input of the processor (30). In a programming mode the first and second control inputs (22B, 22C) may be provided to programming inputs of the processor (30) to thereby enable programming of the processor (30) via the first and second control inputs (22B, 22C).Type: ApplicationFiled: January 12, 2017Publication date: May 18, 2017Inventors: Raman Nair HARISH GOPALA PILLAI, Kaustuva ACHARYA
-
Patent number: 9606523Abstract: External programming of at least one processor (30) of a LED driver (10). In a normal operation mode a first control input (22B/22C) of the LED driver (10) may be provided to a first processor input of the processor and a second control input (22B/22C) of the LED driver may be provided to a second processor input of the processor (30). In a programming mode the first and second control inputs (22B, 22C) may be provided to programming inputs of the processor (30) to thereby enable programming of the processor (30) via the first and second control inputs (22B, 22C).Type: GrantFiled: April 2, 2013Date of Patent: March 28, 2017Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Raman Nair Harish Gopala Pillai, Kaustuva Acharya
-
Patent number: 9565744Abstract: A programmable lighting device includes a power stage, a controller, a nonvolatile memory and a near field communication device. The power stage is configured to receive power from an external supply and supplying power to at least one light source. The controller is configured to control operation of the power stage according to an operating parameter and/or configuration setting for the programmable lighting device. The nonvolatile memory device stores the operating parameter and/or configuration setting. The near field communication device receives a radio frequency signal which communicates the operating parameter and/or configuration setting, and in response thereto stores the operating parameter and/or configuration setting in the nonvolatile memory. The near field communication device generates a supply voltage for powering the nonvolatile memory device from the RF signal.Type: GrantFiled: August 19, 2014Date of Patent: February 7, 2017Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Bing Lai, Bernd Clauberg, Raman Nair Harish Gopala Pillai, Alan James Marble
-
Publication number: 20160165702Abstract: A programmable lighting device includes a power stage, a controller, a nonvolatile memory and a near field communication device. The power stage is configured to receive power from an external supply and supplying power to at least one light source. The controller is configured to control operation of the power stage according to an operating parameter and/or configuration setting for the programmable lighting device. The nonvolatile memory device stores the operating parameter and/or configuration setting. The near field communication device receives a radio frequency signal which communicates the operating parameter and/or configuration setting, and in response thereto stores the operating parameter and/or configuration setting in the nonvolatile memory. The near field communication device generates a supply voltage for powering the nonvolatile memory device from the RF signal.Type: ApplicationFiled: August 19, 2014Publication date: June 9, 2016Inventors: Bing LAI, Bernd CLAUBERG, Raman Nair HARISH GOPALA PILLAI, Alan James MARBLE
-
Patent number: 9301347Abstract: A programmable driver for driving a solid state lighting device includes a processing circuit, a voltage feedback loop and a power stage. The processing circuit is configured to determine a voltage reference signal based on a nominal current setting and a predetermined power limit. The voltage feedback loop is configured to receive the voltage reference signal and to determine a difference between a reference voltage indicated by the voltage reference signal and a drive voltage of the solid state lighting device. The power stage is configured to limit maximum output voltage for driving the solid state lighting device based at least in part on the determined difference between the reference voltage and the drive voltage of the solid state lighting device provided by the voltage feedback loop.Type: GrantFiled: August 30, 2012Date of Patent: March 29, 2016Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Kaustuva Acharya, Raman Nair Harish Gopala Pillai, Yimin Chen, Ajay Tripathi
-
Patent number: 9198256Abstract: A light driver having a primary side driver configured to convert an input from a mains power supply to a primary side output, and a secondary side driver coupled to the primary side driver and configured to rectify and filter the primary side output to provide a driver output current for driving a light load. A microcontroller controls the light driver at start-up so that the secondary side driver is powered-on and the primary side driver is in a non-powered state during a soft-start period, and subsequent to the soft-start period the secondary side driver is set to be in a low output state when powered-on and thereafter set to a state so that driver output current of the secondary side driver increases the light output from the light load from an initial dim level to a nominal dim level without flicker.Type: GrantFiled: December 20, 2011Date of Patent: November 24, 2015Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Yimin Chen, Nicholaos Hillas, Ajay Tripathi, Kaustuva Acharya, Raman Nair Harish Gopala Pillai
-
Patent number: 9035571Abstract: An electronic ballast with dimming circuit including an electronic ballast dimming circuit receiving an analog dimming signal, the electronic ballast dimming circuit including an input dimming circuit (210) operable to receive the analog dimming signal (252) at an analog dimming signal input (212); and an output dimming circuit (220) operably connected to the input dimming circuit (210), the output dimming circuit (220) being operable to receive a fixed frequency signal (222) having a variable duty cycle and to generate an analog dimming control signal (224) in response to the analog dimming signal (252). Output voltage at the analog dimming signal input (212) is a function of the variable duty cycle of the fixed frequency signal (222) when the analog dimming signal (252) is not present at the analog dimming signal input (212).Type: GrantFiled: September 3, 2010Date of Patent: May 19, 2015Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Robert A. Erhardt, William Lawrence Keith, Raman Nair Harish Gopala Pillai, Jerzy Janczak, Ningliang Mi, Srinivasa Baddela
-
Publication number: 20150094827Abstract: External programming of at least one processor (30) of a LED driver (10). In a normal operation mode a first control input (22B/22C) of the LED driver (10) may be provided to a first processor input of the processor and a second control input (22B/22C) of the LED driver may be provided to a second processor input of the processor (30). In a programming mode the first and second control inputs (22B, 22C) may be provided to programming inputs of the processor (30) to thereby enable programming of the processor (30) via the first and second control inputs (22B, 22C).Type: ApplicationFiled: April 2, 2013Publication date: April 2, 2015Inventors: Raman Nair Harish Gopala Pillai, Kaustuva Acharya
-
Patent number: 8957604Abstract: A system for implementing mains-voltage-based dimming of a solid state lighting module includes a transformer, a mains sensing circuit and a processing circuit. The transformer includes a primary side connected to a primary side circuit and a secondary side connected to a secondary side circuit, the primary and second side circuits being separated by an isolation barrier. The mains sensing circuit receives a rectified mains voltage from the primary side circuit and generates a mains sense signal indicating amplitude of the rectified mains voltage. The processing circuit receives the mains sense signal from the mains sensing circuit across the isolation barrier, and outputs a dimming reference signal to the secondary side circuit in response to the mains sense signal. Light output by the solid state lighting module, connected to the secondary side circuit, is adjusted in response to the dimming reference signal output by the processing circuit.Type: GrantFiled: July 24, 2012Date of Patent: February 17, 2015Assignee: Koninklijke Philips N.V.Inventors: Raman Nair Harish Gopala Pillai, Kaustuva Acharya, Ajay Tripathi
-
Publication number: 20140285103Abstract: A programmable driver for driving a solid state lighting device includes a processing circuit, a voltage feedback loop and a power stage. The processing circuit is configured to determine a voltage reference signal based on a nominal current setting and a predetermined power limit. The voltage feedback loop is configured to receive the voltage reference signal and to determine a difference between a reference voltage indicated by the voltage reference signal and a drive voltage of the solid state lighting device. The power stage is configured to limit maximum output voltage for driving the solid state lighting device based at least in part on the determined difference between the reference voltage and the drive voltage of the solid state lighting device provided by the voltage feedback loop.Type: ApplicationFiled: August 30, 2012Publication date: September 25, 2014Inventors: Kaustuva Acharya, Raman Nair Harish Gopala Pillai, Yimin Chen, Ajay Tripathi
-
Publication number: 20140176008Abstract: A system for implementing mains-voltage-based dimming of a solid state lighting module includes a transformer, a mains sensing circuit and a processing circuit. The transformer includes a primary side connected to a primary side circuit and a secondary side connected to a secondary side circuit, the primary and second side circuits being separated by an isolation barrier. The mains sensing circuit receives a rectified mains voltage from the primary side circuit and generates a mains sense signal indicating amplitude of the rectified mains voltage. The processing circuit receives the mains sense signal from the mains sensing circuit across the isolation barrier, and outputs a dimming reference signal to the secondary side circuit in response to the mains sense signal. Light output by the solid state lighting module, connected to the secondary side circuit, is adjusted in response to the dimming reference signal output by the processing circuit.Type: ApplicationFiled: July 24, 2012Publication date: June 26, 2014Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Raman Nair Harish Gopala Pillai, Kaustuva Acharya, Ajay Tripathi
-
Publication number: 20130271040Abstract: A light driver having a primary side driver configured to convert an input from a mains power supply to a primary side output, and a secondary side driver coupled to the primary side driver and configured to rectify and filter the primary side output to provide a driver output current for driving a light load. A microcontroller controls the light driver at start-up so that the secondary side driver is powered-on and the primary side driver is in a non-powered state during a soft-start period, and subsequent to the soft-start period the secondary side driver is set to be in a low output state when powered-on and thereafter set to a state so that driver output current of the secondary side driver increases the light output from the light load from an initial dim level to a nominal dim level without flicker.Type: ApplicationFiled: December 20, 2011Publication date: October 17, 2013Applicant: Koninklijke Philips N.V.Inventors: Yimin Chen, Nicholaos Hillas, Ajay Tripathi, Kaustuva Acharya, Raman Nair Harish Gopala Pillai
-
Publication number: 20120200232Abstract: An electronic ballast with dimming circuit including an electronic ballast dimming circuit receiving an analog dimming signal, the electronic ballast dimming circuit including an input dimming circuit (210) operable to receive the analog dimming signal (252) at an analog dimming signal input (212); and an output dimming circuit (220) operably connected to the input dimming circuit (210), the output dimming circuit (220) being operable to receive a fixed frequency signal (222) having a variable duty cycle and to generate an analog dimming control signal (224) in response to the analog dimming signal (252). Output voltage at the analog dimming signal input (212) is a function of the variable duty cycle of the fixed frequency signal (222) when the analog dimming signal (252) is not present at the analog dimming signal input (212).Type: ApplicationFiled: September 3, 2010Publication date: August 9, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Robert A. Erhardt, William Lawrence Keith, Raman Nair Harish Gopala Pillai, Jerzy Janczak, Ningliang Mi, Srinivasa Baddela