Patents by Inventor Kapil Sakariya
Kapil Sakariya 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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Patent number: 10395594Abstract: Methods, systems, and apparatuses for controlling an emission of the light emitting devices are described herein. The light emitting devices may be light emitting diode (LED) devices including ?LED devices or organic LED (OLED) devices. Emission control of the LED may be performed using a micro-scale driving circuit (e.g., ?Driver) containing drive transistors for constant current driving of the light emitting devices. One embodiment provides for a display driver hardware circuit including emission logic, the emission logic including comparator logic to compare a data voltage from a storage capacitor to a voltage ramp provided via the TFT backplane, the comparator logic to cause the emission logic to generate an emission pulse to an LED device, and wherein the integrated circuit is to switch and drive a plurality of LED devices. In one embodiment each of the plurality of LED devices is a subpixel for a display device.Type: GrantFiled: August 25, 2016Date of Patent: August 27, 2019Assignee: Apple Inc.Inventors: Thomas Charisoulis, Tore Nauta, Kapil Sakariya, Jean-Jacques P. Drolet
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Publication number: 20150154907Abstract: A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.Type: ApplicationFiled: October 16, 2014Publication date: June 4, 2015Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar
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Patent number: 8890220Abstract: A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.Type: GrantFiled: September 26, 2013Date of Patent: November 18, 2014Assignee: Ignis Innovation, Inc.Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar
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Patent number: 8664644Abstract: A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.Type: GrantFiled: April 19, 2011Date of Patent: March 4, 2014Assignee: Ignis Innovation Inc.Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar
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Publication number: 20140028217Abstract: A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.Type: ApplicationFiled: September 26, 2013Publication date: January 30, 2014Applicant: Ignis Innovation Inc.Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar
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Publication number: 20110193834Abstract: A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.Type: ApplicationFiled: April 19, 2011Publication date: August 11, 2011Applicant: Ignis Innovation Inc.Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar
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Patent number: 7786755Abstract: Methods, systems, computer readable media and means for reducing errors in data caused by noise are provided. In some embodiments of the present invention, circuitry of the device receives timing data from one or more other circuitries and identifies noiseless periods from the timing data. The circuitry then actively adjusts the trigger point threshold of data being transmitted to and/or from the circuitry only during the noiseless periods. The circuitry subsequently monitors the timing data to identify noise periods. In response to identifying a noise period, the device ceases to adjust the trigger point threshold until the noise period is over.Type: GrantFiled: September 29, 2008Date of Patent: August 31, 2010Assignee: Apple Inc.Inventors: Wei Yao, Wei Chen, Kapil Sakariya
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Publication number: 20090284501Abstract: A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.Type: ApplicationFiled: July 16, 2009Publication date: November 19, 2009Applicant: IGNIS INNOVATION INC.Inventors: AROKIA NATHAN, PEYMAN SERVATI, KAPIL SAKARIYA, ANIL KUMAR
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Publication number: 20090202002Abstract: Methods, systems, computer readable media and means for reducing errors in data caused by noise are provided. In some embodiments of the present invention, timing data is transferred from first circuitry to second circuitry. From the timing data, one or both of the first circuitry and the second circuitry detect whether noise is present as a result of the operations of the first circuitry. If it is detected that noise is present the second circuitry waits for the cessation of the noise before functioning again. If it is detected that no noise is present, the second circuitry functions.Type: ApplicationFiled: September 29, 2008Publication date: August 13, 2009Applicant: Apple Inc.Inventors: Wei Yao, Wei Chen, Kapil Sakariya
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Publication number: 20090201048Abstract: Methods, systems, computer readable media and means for reducing errors in data caused by noise are provided. In some embodiments of the present invention, circuitry of the device receives timing data from one or more other circuitries and identifies noiseless periods from the timing data. The circuitry then actively adjusts the trigger point threshold of data being transmitted to and/or from the circuitry only during the noiseless periods. The circuitry subsequently monitors the timing data to identify noise periods. In response to identifying a noise period, the device ceases to adjust the trigger point threshold until the noise period is over.Type: ApplicationFiled: September 29, 2008Publication date: August 13, 2009Applicant: Apple Inc.Inventors: Wei Yao, Wei Chen, Kapil Sakariya
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Patent number: 7573452Abstract: Integrated multiplexer/de-multiplexer for a pixel array is provided. A drive circuit having the de-multiplexer is provided to a gate line arranged for a pixel array. A pixel is selected using the drive circuit. A read circuit having the multiplexer is provided to a data line arranged for the pixel array. Data output from a pixel is read using the read circuit.Type: GrantFiled: August 15, 2002Date of Patent: August 11, 2009Assignee: Ignis Innovation Inc.Inventors: Arokia Nathan, Karim S. Karim, Nitin Mohan, Anil Kumar, Kapil Sakariya
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Patent number: 7569849Abstract: A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.Type: GrantFiled: September 6, 2005Date of Patent: August 4, 2009Assignee: Ignis Innovation Inc.Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar
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Patent number: 7414600Abstract: A pixel current driver comprises a plurality of thin film transistors (TFTs) each having dual gates and for driving OLED layers. A top gate of the dual gates is formed between a source and a drain of each of the thin film transistors, to thereby minimize parasitic capacitance. The top gate is grounded or electrically tied to a bottom gate. The plurality of thin film transistors may be two thin film transistors formed in voltage-programmed manner or five thin film transistors formed in a current-programmed ?VT-compensated manner. Other versions of the current-programmed circuit with different numbers of thin film transistors are also presented that compensate for ?VT. The OLED layer are continuous and vertically stacked on the plurality of thin film transistors to provide an aperture ratio close to 100%.Type: GrantFiled: October 11, 2005Date of Patent: August 19, 2008Assignee: Ignis Innovation Inc.Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar
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Publication number: 20080048951Abstract: The present invention describes a method and apparatus for measuring the voltage and current characteristics of the OLED pixel as it ages and correlating the measured data to the decrease in quantum efficiency and changes in OLED impedance over the life of the OLED, so that corrections can be made to the image drive system to prevent image sticking and color point drift. The method and apparatus of the present invention do not require any additional circuitry or changes in the display design. The circuitry of the present invention is implemented in the display driver integrated circuit (IC) chips. The basis of the invention is the luminance-current-voltage (LIV) curves which characterize the OLED materials over their life time. A series of these curves are stored in memory representing a OLED material at various ages.Type: ApplicationFiled: February 22, 2007Publication date: February 28, 2008Inventors: Walter Naugler, Donald Wile, Kapil Sakariya
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Publication number: 20070182671Abstract: A pixel circuit for use in a display comprising a plurality of pixels is provided. The load-balanced current mirror pixel circuit can compensate for device degradation and/or mismatch, and changing environmental factors like temperature and mechanical strain. The pixel circuit comprises a pixel drive circuit comprising, switching circuitry, a current mirror having a reference transistor and a drive transistor, the reference transistor and the drive transistor each having a first and second node and a gate, the gate of the reference transistor being connected to the gate of the drive transistor; and a capacitor connected between the gate of the reference transistor and a ground potential, and a load connected between the current mirror and a ground potential, the load having a first load element and a second load element, the first load element being connected to the first node of the reference transistor and the second load element being connected to the first node of the drive transistor.Type: ApplicationFiled: September 23, 2004Publication date: August 9, 2007Inventors: Arokia Nathan, Kapil Sakariya, Peyman Servati, Shahin Jafarabadiashtiani
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Publication number: 20060054893Abstract: A pixel driver circuit for driving a light-emitting element and a pixel circuit having the pixel driver circuit are provided. The pixel driver circuit includes a data line, address lines, switch thin film transistors, feedback thin film transistors and drive thin film transistors. The pixel circuit may include an organic light emitting diode, which is driven by the pixel driver circuit.Type: ApplicationFiled: September 6, 2005Publication date: March 16, 2006Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar
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Publication number: 20060027807Abstract: A pixel current driver comprises a plurality of thin film transistors (TFTs) each having dual gates and for driving OLED layers. A top gate of the dual gates is formed between a source and a drain of each of the thin film transistors, to thereby minimize parasitic capacitance. The top gate is grounded or electrically tied to a bottom gate. The plurality of thin film transistors may be two thin film transistors formed in voltage-programmed manner or five thin film transistors formed in a current-programmed ?VT-compensated manner. Other versions of the current-programmed circuit with different numbers of thin film transistors are also presented that compensate for ?VT. The OLED layer are continuous and vertically stacked on the plurality of thin film transistors to provide an aperture ratio close to 100%.Type: ApplicationFiled: October 11, 2005Publication date: February 9, 2006Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya
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Publication number: 20040129933Abstract: A pixel current driver comprises a plurality of thin film transistors (TFTs) each having dual gates and for driving OLED layers. A top gate of the dual gates is formed between a source and a drain of each of the thin film transistors, to thereby minimize parasitic capacitance. The top gate is grounded or electrically tied to a bottom gate. The plurality of thin film transistors may be two thin film transistors formed in voltage-programmed manner or five thin film transistors formed in a current-programmed &Dgr;VT-compensated manner. Other versions of the current-programmed circuit with different numbers of thin film transistors are also presented that compensate for &dgr;VT. The OLED layer are continuous and vertically stacked on the plurality of thin film transistors to provide an aperture ratio close to 100%.Type: ApplicationFiled: January 23, 2004Publication date: July 8, 2004Inventors: Arokia Nathan, Peyman Servati, Kapil Sakariya