Patents by Inventor Pankaj Agarwal

Pankaj Agarwal 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: 8467204
    Abstract: A high voltage power supply is provided. The high voltage power supply includes an inverter which converts a DC voltage input to the high voltage power supply into a first AC voltage, a transformer including an input winding unit and a plurality of output winding units, wherein the input winding unit receives the first AC voltage from the inverter and the plurality of output winding units generates and outputs a second AC voltage, and a voltage multiplier unit which boosts the second AC voltage output by the transformer and outputs a boosted voltage, and the voltage multiplier unit includes a plurality of voltage multipliers which are connected to each other in series and the plurality of voltage multipliers may be connected to the plurality of output winding units respectively.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: June 18, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Pankaj Agarwal, Kang-hyun Yi, Sung-jin Choi, Joon-hyun Yang
  • Publication number: 20130121065
    Abstract: A dynamic wordline assist circuit for improving performance of an SRAM. An SRAM is disclosed that includes a plurality of memory cells, wherein each memory cell is coupled to a wordline and a pair of bitlines; and a wordline assist circuit coupled to the wordline, wherein the wordline assist circuit includes a first input for activating the wordline assist circuit during a read or write cycle and includes a second input for deactivating the wordline assist circuit during the read or write cycle after a delay.
    Type: Application
    Filed: November 15, 2011
    Publication date: May 16, 2013
    Applicant: International Business Machines Corporation
    Inventors: Pankaj Agarwal, Vaibhav V. Prabhu, Krishnan S. Rengarajan
  • Patent number: 8427896
    Abstract: A dynamic wordline assist circuit for improving performance of an SRAM. An SRAM is disclosed that includes a plurality of memory cells, wherein each memory cell is coupled to a wordline and a pair of bitlines; and a wordline assist circuit coupled to the wordline, wherein the wordline assist circuit includes a first input for activating the wordline assist circuit during a read or write cycle and includes a second input for deactivating the wordline assist circuit during the read or write cycle after a delay.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: April 23, 2013
    Assignee: International Business Machines Corporation
    Inventors: Pankaj Agarwal, Vaibhav V. Prabhu, Krishnan S. Rengarajan
  • Patent number: 8411019
    Abstract: A display apparatus includes a display panel, a light source unit including a plurality of light sources that irradiate the display panel with light, a first control signal generating unit that inverts and forward rectifies a scan signal for scanning of the light source unit, a second control signal generating unit that inverts and backward rectifies an overdrive signal for overcurrent emission of the light source unit and has its output port coupled to an output port of the first control signal generating unit, and an inverter that supplies current to the light source unit based on a control signal output from the output port of the first control signal generating unit and the output port of the second control signal generating unit.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: April 2, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Pankaj Agarwal, Kyoung-geun Lee
  • Patent number: 8279569
    Abstract: An apparatus for preventing abnormal voltage, a light emitting module, and a display apparatus are provided. The present apparatus for preventing abnormal voltage extracts the highest voltage and the lowest voltage among voltage applied from a plurality of loads, includes two voltage distribution units distributing the highest voltage and the lowest voltage, and detects whether the highest voltage and the lowest voltage applied from the voltage distribution unit are within a predetermined range. Accordingly, the apparatus for preventing abnormal voltage is not affected greatly in terms of its size and cost even if the number of loads to be protected increases.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: October 2, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Pankaj Agarwal, Sung-jin Choi, Tae-hoon Kim
  • Publication number: 20120185301
    Abstract: Systems and methods for process optimization pertaining to Suppliers-Inputs-Process-Outputs-Customers (SIPOC) diagram for different processes optimization are described herein. In one implementation, a process optimization system is utilized for process optimization. The process optimization system comprises a processor, and a memory. The memory comprises a comparison module and an evaluation module. The evaluation module is configured to receive one or more evaluation parameters and evaluate a rating score for at least one attribute based at least in part on the one or more evaluation parameters. The comparison module is configured to determine one or more benchmark parameters based on the rating score, and provide one or more benchmark parameters.
    Type: Application
    Filed: January 11, 2012
    Publication date: July 19, 2012
    Applicant: Tata Consultancy Services Limited
    Inventors: Raman V.K., Ranjan Bandopadhyay, Pankaj Agarwal, Pawan Suri, Viraj Saraiya
  • Patent number: 8049431
    Abstract: An apparatus and a method for driving a light source are provided. The apparatus includes a power converting unit which converts a direct current (DC) power into an alternating current (AC) power for driving the light source, and a control unit which controls the power converting unit to convert the DC power into the AC power according to a pulsewave.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: November 1, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Pankaj Agarwal, Joon-hyun Yang
  • Publication number: 20110242853
    Abstract: A high voltage power supply is provided. The high voltage power supply includes an inverter which converts a DC voltage input to the high voltage power supply into a first AC voltage, a transformer including an input winding unit and a plurality of output winding units, wherein the input winding unit receives the first AC voltage from the inverter and the plurality of output winding units generates and outputs a second AC voltage, and a voltage multiplier unit which boosts the second AC voltage output by the transformer and outputs a boosted voltage, and the voltage multiplier unit includes a plurality of voltage multipliers which are connected to each other in series and the plurality of voltage multipliers may be connected to the plurality of output winding units respectively.
    Type: Application
    Filed: November 22, 2010
    Publication date: October 6, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pankaj AGARWAL, Kang-hyun YI, Sung-jin CHOI, Joon-hyun YANG
  • Publication number: 20110234012
    Abstract: A wireless power transceiving system includes a power transmitting apparatus which converts power into a resonance wave and transmits the resonance wave, and a power receiving apparatus which receives the transmitted resonance wave and converts the resonance wave into DC power using a series resonant rectifier circuit which is impedance matched with impedance of the power receiving apparatus at a frequency of the resonance wave.
    Type: Application
    Filed: September 10, 2010
    Publication date: September 29, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kang-hyun YI, Sung-jin CHOI, Pankaj AGARWAL, Joon-hyun YANG
  • Publication number: 20110234186
    Abstract: A high voltage power supply is provided. The high voltage power supply includes a soft-start circuit unit which outputs a natural voltage that decreases exponentially as time elapses and converts the natural voltage into a forced voltage having a predetermined scale if an enable signal is applied, a controller which compares the natural voltage output from the soft-start circuit unit with a reference voltage and outputs a control signal, and a converting unit which delays outputting a final voltage during a first predetermined time period and outputs the final voltage, which gradually increases as time elapses according to the control signal.
    Type: Application
    Filed: November 22, 2010
    Publication date: September 29, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pankaj AGARWAL, Joon-hyun YANG, Sung-jin CHOI
  • Publication number: 20110222153
    Abstract: Three-dimensional (3D) glasses which are capable of being charged by a remote controller, the remote controller, and a charging system using the same are provided. The charging system includes: a remote controller and 3D glasses, wherein the remote controller generates a signal for wirelessly charging the 3D glasses, and the 3D glasses are charged by receiving the generated signal from the remote controller and generating power using the received signal. Therefore, the 3D glasses may be charged while being used, thereby improving a user convenience.
    Type: Application
    Filed: November 19, 2010
    Publication date: September 15, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pankaj AGARWAL, Min-cheol HWANG
  • Publication number: 20110122167
    Abstract: A backlight unit and a display apparatus are provided. The display apparatus includes a power supply unit which outputs a first voltage; a light emitting unit which includes a first end connected to the power supply unit, and a second end, the first end receiving the first voltage from the power supply unit; and a compensation unit which includes a first end connected to the second end of the light emitting unit, and which compensates a deviation between the first voltage and a rated voltage of the light emitting unit.
    Type: Application
    Filed: June 21, 2010
    Publication date: May 26, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tae-hoon KIM, Sang-hoon LEE, Sung-jin CHOI, Myoung-jun LEE, Pankaj AGARWAL, Youn-hee KIM
  • Publication number: 20110122169
    Abstract: A display apparatus is provided. The display apparatus includes: a display panel; and a backlight unit which provides the display panel with backlight. The backlight unit includes: a converter which converts a voltage of a received power and outputs an output power, a plurality of light source modules which receives the output power from the converter, and a control unit which determines powering conditions to operate the plurality of the light source modules in a specific state for each of the plurality of light source modules, and controls the converter sequentially based on the determined powering conditions.
    Type: Application
    Filed: July 19, 2010
    Publication date: May 26, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-jin CHOI, Sang-hoon LEE, Tae-hoon KIM, Pankaj AGARWAL, Myoung-jun LEE, Youn-hee KIM
  • Publication number: 20110102475
    Abstract: A display apparatus, a backlight unit, a backlight providing method for controlling a plurality of light emitting diode (LED) strings are provided. The display apparatus includes a display panel, and a backlight unit (BLU) which projects backlight onto the display panel, wherein the BLU includes a plurality of light emitting diode (LED) strings, and a power supply unit which supplies minimum voltage from among the voltages needed to operate the plurality of LED strings to the plurality of LED strings. Therefore, the plurality of LED strings can have the same luminance.
    Type: Application
    Filed: June 4, 2010
    Publication date: May 5, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pankaj AGARWAL, Sang-hoon LEE, Sung-jin CHOI, Tae-hoon KIM, Myoung-jun LEE, Youn-hee KIM
  • Publication number: 20110089849
    Abstract: A display apparatus and a backlight unit which control a plurality of lamps, and a display driving method are provided. The display apparatus includes a display, and a backlight unit which provides a backlight to the display. The backlight includes a plurality of lamps, and a lamp driver which adjusts a frequency of power supplied to the plurality of lamps until all of the plurality of lamps enter a running mode.
    Type: Application
    Filed: June 4, 2010
    Publication date: April 21, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pankaj AGARWAL, Sang-hoon LEE
  • Publication number: 20110057960
    Abstract: A backlight apparatus and a display apparatus are provided. The backlight apparatus includes N first switch units to switch a plurality of currents flowing in respective N light emitting element arrays according to an input brightness control signal, N second switch units to switch a plurality of currents flowing in respective N capacitors according to the input brightness control signal, and a reference current generation unit to generate and output a reference current based on the input brightness control signal. An inverter unit adjusts a total current supplied to all of the light emitting element arrays in total to be equal to the reference current if the total current is different from the reference current.
    Type: Application
    Filed: April 16, 2010
    Publication date: March 10, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tae-hoon KIM, Sung-jin CHOI, Pankaj AGARWAL, Joon-hyun YANG
  • Publication number: 20100309597
    Abstract: An apparatus for preventing abnormal voltage, a light emitting module, and a display apparatus are provided. The present apparatus for preventing abnormal voltage extracts the highest voltage and the lowest voltage among voltage applied from a plurality of loads, includes two voltage distribution units distributing the highest voltage and the lowest voltage, and detects whether the highest voltage and the lowest voltage applied from the voltage distribution unit are within a predetermined range. Accordingly, the apparatus for preventing abnormal voltage is not affected greatly in terms of its size and cost even if the number of loads to be protected increases.
    Type: Application
    Filed: March 16, 2010
    Publication date: December 9, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pankaj AGARWAL, Sung-jin CHOI, Tae-hoon KIM
  • Publication number: 20100253665
    Abstract: A current balancing apparatus, a power supply apparatus, a lighting apparatus, and a current balancing method for preventing luminance imbalance are provided. The current balancing apparatus includes a balancer for balancing an AC current and a rectifier for generating a DC current by rectifying the balanced current. Hence, the luminance imbalance caused by dispersion of a light source can be addressed.
    Type: Application
    Filed: January 19, 2010
    Publication date: October 7, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung-jin CHOI, Tae-hoon KIM, Pankaj AGARWAL
  • Publication number: 20090128544
    Abstract: A display apparatus includes a display panel, a light source unit including a plurality of light sources that irradiate the display panel with light, a first control signal generating unit that inverts and forward rectifies a scan signal for scanning of the light source unit, a second control signal generating unit that inverts and backward rectifies an overdrive signal for overcurrent emission of the light source unit and has its output port coupled to an output port of the first control signal generating unit, and an inverter that supplies current to the light source unit based on a control signal output from the output port of the first control signal generating unit and the output port of the second control signal generating unit.
    Type: Application
    Filed: August 29, 2008
    Publication date: May 21, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pankaj AGARWAL, Kyoung-geun LEE
  • Publication number: 20080224628
    Abstract: An apparatus and a method for driving a light source are provided. The apparatus includes a power converting unit which converts a direct current (DC) power into an alternating current (AC) power for driving the light source, and a control unit which controls the power converting unit to convert the DC power into the AC power according to a pulsewave.
    Type: Application
    Filed: September 11, 2007
    Publication date: September 18, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Pankaj AGARWAL, Joon-hyun YANG