Patents by Inventor Balaji Venugopal Virajpet

Balaji Venugopal Virajpet 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).

  • Control of light-emitting-diode backlight illumination through frame insertion
    Patent number: 8547323
    Abstract: 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: Grant
    Filed: March 23, 2012
    Date of Patent: October 1, 2013
    Assignee: Atmel Corporation
    Inventors: Dilip Sangam, Balaji Venugopal Virajpet, Tushar Dhayagude
  • Control of light-emitting-diode backlight illumination through frame insertion
    Patent number: 8378961
    Abstract: 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: Grant
    Filed: January 15, 2010
    Date of Patent: February 19, 2013
    Assignee: Atmel Corporation
    Inventors: Dilip Sangam, Balaji Venugopal Virajpet, Tushar Dhayagude
  • CONTROL OF LIGHT-EMITTING-DIODE BACKLIGHT ILLUMINATION THROUGH FRAME INSERTION
    Publication number: 20120306944
    Abstract: 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: Application
    Filed: March 23, 2012
    Publication date: December 6, 2012
    Applicant: ATMEL Coporation
    Inventors: Dilip Sangam, Balaji Venugopal Virajpet, Tushar Dhayagude
  • CONTROL OF LIGHT-EMITTING-DIODE BACKLIGHT ILLUMINATION THROUGH FRAME INSERTION
    Publication number: 20110175935
    Abstract: 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: Application
    Filed: January 15, 2010
    Publication date: July 21, 2011
    Applicant: MSILICA INC
    Inventors: Dilip S, Balaji Venugopal Virajpet, Tushar Dhayagude