1
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.


2
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 ...


3
Arokia Nathan, Shahin Jafarabadiashtiani, G Reza Chaji: Method and system for driving a pixel circuit in an active matrix display. Ignis Innovation, Nixon Peabody, July 17, 2012: US08223177 (88 worldwide citation)

A method and system for driving a pixel circuit in an active matrix display is provided. The system implements a feedback driving scheme to enhance programming speed of the pixel circuit. The system includes a column driver for driving the pixel circuit with feedback. A controller controls a signal ...


4
Arokia Nathan, G Reza Chaji: Method and system for driving an active matrix display circuit. Ignis Innovation, Nixon Peabody, August 28, 2012: US08253665 (25 worldwide citation)

A method and system for driving an active matrix display is provided. The system includes a drive circuit for a pixel having a light emitting device. The drive circuit includes a drive transistor for driving the light emitting device. The system includes a mechanism for adjusting the gate voltage of ...


5
Arokia Nathan, Stefan Alexander, Peyman Servati, G Reza Chaji, Rick I Heng Huang, Corbin Church: Method and system for compensation of non-uniformities in light emitting device displays. Ignis Innovation, Nixon Peabody, January 11, 2011: US07868857 (9 worldwide citation)

A method and system for compensation of non-uniformities in light emitting device displays is provided. The system includes a module for estimating degradation of an entire pixel circuit based on measurement of a part of the pixel circuit. Based on the estimation, a correction factor is produced to ...


6
Arokia Nathan, G Reza Chaji, Stefan Alexander: System and driving method for light emitting device display. Ignis Innovation, Nixon Peabody, December 24, 2013: US08614652 (6 worldwide citation)

A light emitting device display, its pixel circuit and its driving technique is provided. The pixel includes a light emitting device and a plurality of transistors. A bias current and programming voltage data are provided to the pixel circuit in accordance with a driving scheme so that the current t ...


7
Arokia Nathan, G Reza Chaji: Method and system for driving a light emitting device display. Ignis Innovation, Nixon Peabody, October 14, 2014: US08860636 (3 worldwide citation)

A method and system for driving a light emitting device display is provided. The system provides a timing schedule which increases accuracy in the display. The system may provide the timing schedule by which an operation cycle is implemented consecutively in a group of rows. The system may provide t ...


8
G Reza Chaji, Arokia Nathan: Low power circuit and driving method for emissive displays. Ignis Innovation, Nixon Peabody, January 22, 2013: US08358299 (3 worldwide citation)

A display system, a driver for driving the display array, method of operating the display system and a pixel circuit in the display system are provided. The driver includes: a bidirectional current source having a convertor coupling to a time-variant voltage, for converting the time-variant voltage ...


9
Arokia Nathan, G Reza Chaji, Shahin Jafarabadiashtiani: Compensation technique for luminance degradation in electro-luminance devices. Ignis Innovation, Nixon Peabody, May 29, 2012: US08188946 (3 worldwide citation)

A method and system for compensation for luminance degradation in electro-luminance devices is provided. The system includes a pixel circuit having a light emitting device, a storage capacitor, a plurality of transistors, and control signal lines to operate the pixel circuit. The storage capacitor i ...


10
Arokia Nathan, G Reza Chaji: Method and system for driving a light emitting device display. Ignis Innovation, Nixon Peabody, December 14, 2010: US07852298 (2 worldwide citation)

A method and system for driving a light emitting device display is provided. The system provides a timing schedule which increases accuracy in the display. The system may provide the timing schedule by which an operation cycle is implemented consecutively in a group of rows. The system may provide t ...