09589490 is referenced by 7 patents and cites 667 patents.

A system to improve the extraction of transistor and OLED parameters in an AMOLED display includes a pixel circuit having an organic light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input to provide the programming signal, and a storage device to store the programming signal. A charge-pump amplifier has a current input and a voltage output. The charge-pump amplifier includes an operational amplifier in negative feedback configuration. The feedback is provided by a capacitor connected between the output and the inverting input of the operational amplifier. A common-mode voltage source drives the non-inverting input of the operational amplifier. An electronic switch is coupled across the capacitor to reset the capacitor. A switch module including the input is coupled to the output of the pixel circuit and an output is coupled to the input of the charge-pump amplifier.

Title
System and methods for extraction of threshold and mobility parameters in AMOLED displays
Application Number
15/154445
Publication Number
9589490 (B2)
Application Date
May 13, 2016
Publication Date
March 7, 2017
Inventor
Yaser Azizi
Waterloo
CA
Gholamreza Chaji
Waterloo
CA
Agent
Nixon Peabody
Assignee
Ignis Innovation
CA
IPC
G01R 19/00
G09G 3/32
G09G 3/00
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