Patents by Inventor Tushar Dhayagude
Tushar Dhayagude 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).
-
Patent number: 11496335Abstract: Facilitating ad hoc daisy-chaining of dynamically addressable devices having configurable physical layer interfaces together in a serial manner is presented herein. A system can include a group of devices communicatively coupled with respective devices of the group of devices in a daisy-chained manner via physical layer (PHY) interfaces of the respective devices including a group of available communication protocol configurations including a low voltage differential signaling (LVDS) based PHY configuration, a controller area network (CAN) based PHY configuration, and/or a single-ended serial communication PHY configuration including a complementary metal-oxide-semiconductor (CMOS) based interface or a transistor-transistor logic (TTL) based interface.Type: GrantFiled: October 16, 2020Date of Patent: November 8, 2022Assignee: DOMINANT TECHNOLOGIES (SINGAPORE) PTE LTDInventors: Tushar Dhayagude, EunGu Kim, Tan Eng Wah, Chow Kim Poh
-
Publication number: 20220123959Abstract: Facilitating ad hoc daisy-chaining of dynamically addressable devices having configurable physical layer interfaces together in a serial manner is presented herein. A system can include a group of devices communicatively coupled with respective devices of the group of devices in a daisy-chained manner via physical layer (PHY) interfaces of the respective devices including a group of available communication protocol configurations including a low voltage differential signaling (LVDS) based PHY configuration, a controller area network (CAN) based PHY configuration, and/or a single-ended serial communication PHY configuration including a complementary metal-oxide-semiconductor (CMOS) based interface or a transistor-transistor logic (TTL) based interface.Type: ApplicationFiled: October 16, 2020Publication date: April 21, 2022Inventors: Tushar Dhayagude, EunGu Kim, Tan Eng Wah, Chow Kim Poh
-
Patent number: 9064461Abstract: System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the bad condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the backlight circuitry closes the compensation, feedback loop and provides an input signal to the load-aware controller. The dimming controller implements phase-shifted pulse-modulation dimming, which based on duty cycle can establish a dimming equilibrium with two load conditions. The load aware controller includes a set of compensation blocks arranged in parallel, with a single compensation block connected to the input signal and that provides the control signal.Type: GrantFiled: November 11, 2013Date of Patent: June 23, 2015Assignee: Atmel CorporationInventors: Zhiyu Yang, Kien Vi, Dilip Sangam, Tushar Dhayagude
-
Publication number: 20140139126Abstract: System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the bad condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the backlight circuitry closes the compensation, feedback loop and provides an input signal to the load-aware controller. The dimming controller implements phase-shifted pulse-modulation dimming, which based on duty cycle can establish a dimming equilibrium with two load conditions. The load aware controller includes a set of compensation blocks arranged in parallel, with a single compensation block connected to the input signal and that provides the control signal.Type: ApplicationFiled: November 11, 2013Publication date: May 22, 2014Applicant: Atmel CorporationInventors: ZHIYU YANG, KIEN VI, DILIP SANGAM, TUSHAR DHAYAGUDE
-
Patent number: 8604856Abstract: Systems, circuits and methods for phase-shifting pulse width modulated signal generation are disclosed. In some embodiments, a phase-shifting pulse width modulation circuit is configured to output pulses based on an input pulse width modulated signal. The pulses are staggered relative to one another, and can be received by a light-emitting diode driver for driving a light-emitting diode string at one or more time periods. The phase-shifting pulse width modulation circuit can include a counter-based programmable delay subcircuit consisting of two counter-based programmable delay blocks.Type: GrantFiled: December 21, 2012Date of Patent: December 10, 2013Assignee: Atmel CorporationInventors: Zhiyu Yang, Dilip Sangam, Tushar Dhayagude
-
Patent number: 8581828Abstract: System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the load condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the backlight circuitry closes the compensation feedback loop and provides an input signal to the load-aware controller. The dimming controller implements phase-shifted pulse-modulation dimming, which based on duty cycle can establish a dimming equilibrium with two load conditions. The load aware controller includes a set of compensation blocks arranged in parallel, with a single compensation block connected to the input signal and that provides the control signal.Type: GrantFiled: April 30, 2010Date of Patent: November 12, 2013Assignee: Atmel CorporationInventors: Zhiyu Yang, Kien Vi, Dilip S, Tushar Dhayagude
-
Patent number: 8581810Abstract: The present invention relates to circuits and methods for controlling one or more LEDs or LED drivers. The circuit comprises a programmable decentralized controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters. The controller is also configured to adjust one or more controllable parameters until one or more detectors indicate that one or more measurable parameters in one of the LEDs or LED drivers meet a reference condition. The controller is configured to then set one or more of the controllable parameters to operate at a value relative to the value of the controllable parameters at which the reference condition was met.Type: GrantFiled: June 24, 2008Date of Patent: November 12, 2013Assignee: Atmel CorporationInventors: Tushar Dhayagude, Hendrik Santo
-
Patent number: 8547323Abstract: System(s) and methode s) are provided to regulate backlighting in a light emitting diode (LED)-based display through a sequence of alternate pulse-width-modulation (PWM) frame or sub-frame insertions. Alternate PWM frames or sub-frames can be black or non-black. A plurality of pixels in the display is partitioned into at least one zone including one or more rows of pixels; the at least one zone determines sub-frame period based on refresh frequency of the display. A sequence of alternate PWM sub-frames includes at least one alternate sub-frame and at least one normal sub-frame. Alternate PWM frames or alternate PWM sub-frames include a phase delay during which a backlight unit is turned off, and a PWM sequence in which the backlight unit is turned on with a finite duty cycle for the remainder of the PWM frame or sub-frame.Type: GrantFiled: March 23, 2012Date of Patent: October 1, 2013Assignee: Atmel CorporationInventors: Dilip Sangam, Balaji Venugopal Virajpet, Tushar Dhayagude
-
Publication number: 20130193859Abstract: Systems, circuits and methods for phase-shifting pulse width modulated signal generation are disclosed. In some embodiments, a phase-shifting pulse width modulation circuit is configured to output pulses based on an input pulse width modulated signal. The pulses are staggered relative to one another, and can be received by a light-emitting diode driver for driving a light-emitting diode string at one or more time periods. The phase-shifting pulse width modulation circuit can include a counter-based programmable delay subcircuit consisting of two counter-based programmable delay blocks.Type: ApplicationFiled: December 21, 2012Publication date: August 1, 2013Inventors: Zhiyu Yang, Dilip Sangam, Tushar Dhayagude
-
Patent number: 8441199Abstract: The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.Type: GrantFiled: December 29, 2009Date of Patent: May 14, 2013Assignee: Atmel CorporationInventors: Hendrik Santo, Matthew D. Schindler, Dilip Sangam, Tushar Dhayagude
-
Patent number: 8378961Abstract: System(s) and method(s) are provided to regulate backlighting in a light emitting diode (LED)-based display through a sequence of alternate pulse-width-modulation (PWM) frame or sub-frame insertions. Alternate PWM frames or sub-frames can be black or non-black. A plurality of pixels in the display is partitioned into at least one zone including one or more rows of pixels; the at least one zone determines sub-frame period based on refresh frequency of the display. A sequence of alternate PWM sub-frames includes at least one alternate sub-frame and at least one normal sub-frame. Alternate PWM frames or alternate PWM sub-frames include a phase delay during which a backlight unit is turned off, and a PWM sequence in which the backlight unit is turned on with a finite duty cycle for the remainder of the PWM frame or sub-frame. A sequence of alternate PWM sub-frames can be configured internally or externally.Type: GrantFiled: January 15, 2010Date of Patent: February 19, 2013Assignee: Atmel CorporationInventors: Dilip Sangam, Balaji Venugopal Virajpet, Tushar Dhayagude
-
Patent number: 8339174Abstract: Systems, circuits and methods for phase-shifting pulse width modulated signal generation are disclosed. In some embodiments, a phase-shifting pulse width modulation circuit is configured to output pulses based on an input pulse width modulated signal. The pulses are staggered relative to one another, and can be received by a light-emitting diode driver for driving a light-emitting diode string at one or more time periods. The phase-shifting pulse width modulation circuit can include a counter-based programmable delay subcircuit consisting of two counter-based programmable delay blocks.Type: GrantFiled: February 25, 2010Date of Patent: December 25, 2012Assignee: Atmel CorporationInventors: Zhiyu Yang, Dilip S, Tushar Dhayagude
-
Publication number: 20120306944Abstract: System(s) and methode s) are provided to regulate backlighting in a light emitting diode (LED)-based display through a sequence of alternate pulse-width-modulation (PWM) frame or sub-frame insertions. Alternate PWM frames or sub-frames can be black or non-black. A plurality of pixels in the display is partitioned into at least one zone including one or more rows of pixels; the at least one zone determines sub-frame period based on refresh frequency of the display. A sequence of alternate PWM sub-frames includes at least one alternate sub-frame and at least one normal sub-frame. Alternate PWM frames or alternate PWM sub-frames include a phase delay during which a backlight unit is turned off, and a PWM sequence in which the backlight unit is turned on with a finite duty cycle for the remainder of the PWM frame or sub-frame.Type: ApplicationFiled: March 23, 2012Publication date: December 6, 2012Applicant: ATMEL CoporationInventors: Dilip Sangam, Balaji Venugopal Virajpet, Tushar Dhayagude
-
Patent number: 8314572Abstract: The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.Type: GrantFiled: March 23, 2009Date of Patent: November 20, 2012Assignee: Atmel CorporationInventors: Matthew Schindler, Tushar Dhayagude, Hendrik Santo, Dilip Sangam
-
Patent number: 8217887Abstract: The present invention discloses apparatus and techniques relating to the intelligent control of a display's backlight LED strings. The present invention provides for controlling the display intensity on a region-by-region basis and for adjusting the intensity multiple times within the duration of a frame. The present invention also provides backlight adjustment in a manner that emphasizes certain colors and deemphasizes certain colors. The present invention also provides for adjustment of the backlight based on the ambient temperature.Type: GrantFiled: January 23, 2008Date of Patent: July 10, 2012Assignee: Atmel CorporationInventors: Dilip Sangam, Hendrik Santo, Tushar Dhayagude, Klen Vi, Sean Chen
-
Publication number: 20110267375Abstract: System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the load condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the backlight circuitry closes the compensation feedback loop and provides an input signal to the load-aware controller. The dimming controller implements phase-shifted pulse-modulation dimming, which based on duty cycle can establish a dimming equilibrium with two load conditions. The load aware controller includes a set of compensation blocks arranged in parallel, with a single compensation block connected to the input signal and that provides the control signal.Type: ApplicationFiled: April 30, 2010Publication date: November 3, 2011Applicant: mSilica IncInventors: Zhiyu Yang, Kien Vi, Dilip S., Tushar Dhayagude
-
Publication number: 20110204810Abstract: Systems, circuits and methods for phase-shifting pulse width modulated signal generation are disclosed. In some embodiments, a phase-shifting pulse width modulation circuit is configured to output pulses based on an input pulse width modulated signal. The pulses are staggered relative to one another, and can be received by a light-emitting diode driver for driving a light-emitting diode string at one or more time periods. The phase-shifting pulse width modulation circuit can include a counter-based programmable delay subcircuit consisting of two counter-based programmable delay blocks.Type: ApplicationFiled: February 25, 2010Publication date: August 25, 2011Applicant: MSILICA INCInventors: Zhiyu Yang, Dilip S., Tushar Dhayagude
-
Publication number: 20110175935Abstract: System(s) and method(s) are provided to regulate backlighting in a light emitting diode (LED)-based display through a sequence of alternate pulse-width-modulation (PWM) frame or sub-frame insertions. Alternate PWM frames or sub-frames can be black or non-black. A plurality of pixels in the display is partitioned into at least one zone including one or more rows of pixels; the at least one zone determines sub-frame period based on refresh frequency of the display. A sequence of alternate PWM sub-frames includes at least one alternate sub-frame and at least one normal sub-frame. Alternate PWM frames or alternate PWM sub-frames include a phase delay during which a backlight unit is turned off, and a PWM sequence in which the backlight unit is turned on with a finite duty cycle for the remainder of the PWM frame or sub-frame. A sequence of alternate PWM sub-frames can be configured internally or externally.Type: ApplicationFiled: January 15, 2010Publication date: July 21, 2011Applicant: MSILICA INCInventors: Dilip S, Balaji Venugopal Virajpet, Tushar Dhayagude
-
Publication number: 20100237786Abstract: The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.Type: ApplicationFiled: December 29, 2009Publication date: September 23, 2010Applicant: mSilica IncInventors: Hendrik Santo, Matthew D. Schindler, Dilip S., Tushar Dhayagude
-
Publication number: 20090315467Abstract: The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.Type: ApplicationFiled: March 23, 2009Publication date: December 24, 2009Applicant: mSilica IncInventors: Matthew Schindler, Tushar Dhayagude, Hendrik Santo, Dilip S