1
Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar: Pixel current driver for organic light emitting diode displays. Ignis Innovation, Pearne & Gordon, August 19, 2008: US07414600 (160 worldwide citation)

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 ground ...


2
Arokia Nathan, Gholamreza Reza Chaji, Peyman Servati: Method and system for programming, calibrating and driving a light emitting device display. Ignis Innovation, Pearne & Gordon, November 17, 2009: US07619597 (159 worldwide citation)

A method and system for programming, calibrating and driving a light emitting device display is provided. The system may include extracting a time dependent parameter of a pixel for calibration.


3
Arokia Nathan, Peyman Servati, Kapil Sakariya, Anil Kumar: Pixel driver circuit and pixel circuit having the pixel driver circuit. Ignis Innovation, Pearne & Gordon, August 4, 2009: US07569849 (147 worldwide citation)

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 ...


4
Arokia Nathan, Peyman Servati, Karim S Karim: Organic light emitting diode display having shield electrodes. Ignis Innovation, Pearne & Gordon, July 24, 2007: US07248236 (144 worldwide citation)

An organic light emitting diode (OLED) display includes at least one shield electrode between a cathode layer and an OLED drive circuit. The OLED drive circuit has at least one thin-film transistor (TFT), and the shield electrode is disposed to correspond to the thin-film transistor and closer to th ...


5
Arokia Nathan, Rick Huang, Stefan Alexander: Voltage-programming scheme for current-driven AMOLED displays. Ignis Innovation, Nixon Peabody, February 14, 2012: US08115707 (116 worldwide citation)

A system and method for driving an AMOLED display is provided. The AMOLED display includes a plurality of pixel circuits. A voltage-programming scheme, a current-programming scheme or a combination thereof is applied to drive the display. Threshold shift information, and/or voltage necessary to obta ...


6
Arokia Nathan, G Reza Chaji: OLED luminance degradation compensation. Ignis Innovation, Nixon Peabody, September 27, 2011: US08026876 (97 worldwide citation)

A system and method are disclosed for determining a pixel capacitance. The pixel capacitance is correlated to a pixel age to determine a current correction factor used for compensating the pixel drive current to account for luminance degradation of the pixel that results from the pixel aging.


7
Arokia Nathan, Gholamreza Chaji: OLED luminance degradation compensation. Ignis Innovation, Nixon Peabody, October 2, 2012: US08279143 (93 worldwide citation)

A system and method are disclosed for determining a pixel capacitance. The pixel capacitance is correlated to a pixel age to determine a current correction factor used for compensating the pixel drive current to account for luminance degradation of the pixel that results from the pixel aging.


8
Arokia Nathan, Yuriy Vygranenko, Shahin Jafarabadiashtiani, Peyman Servati: Circuit and method for driving an array of light emitting pixels. Ignis Innovation, Nixon Peabody, July 12, 2011: US07978187 (93 worldwide citation)

A technique for driving a column of pixels that include light emitting elements. The technique incorporates feedback data provided from feedback data sources connected to the data line and to feedback line of the array, pixel driving circuit with feedback path. The technique can also include block o ...


9
Arokia Nathan, Gholamreza Reza Chaji, Peyman Servati: Method and system for programming, calibrating and driving a light emitting device display. Ignis Innovation, Nixon Peabody, September 4, 2012: US08259044 (89 worldwide citation)

A method and system for programming, calibrating and driving a light emitting device display is provided. The system may include extracting a time dependent parameter of a pixel for calibration.


10
Arokia Nathan, G Reza Chaji: Method and system for light emitting device displays. Ignis Innovation, Nixon Peabody, April 12, 2011: US07924249 (89 worldwide citation)

A method and system for light emitting device displays is provided. The system includes one or more pixels, each having a light emitting device, a drive transistor for driving the light emitting device, and a switch transistor for selecting the pixel; and a circuit for monitoring and extracting the ...