A Driving Scheme for AMOLED Displays Based on Current Feedback

A scheme of driving AMOLED displays with amorphous silicon (a-Si) thin film transistors (TFTs) is presented. By exploiting current feedback, a transresistance amplifier as column driver, and an accelerating current pulse, the driving scheme provides fast programming and low sensitivity of OLED curre...

Full description

Saved in:
Bibliographic Details
Main Authors: Ashtiani, S.J., Nathan, A.
Format: Conference Proceeding
Language:English
Subjects:
Acceleration
Active matrix organic light emitting diodes
Amorphous silicon
CMOS technology
Driver circuits
Feedback
Flat panel displays
Organic light emitting diodes
Pulse amplifiers
Thin film transistors
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A scheme of driving AMOLED displays with amorphous silicon (a-Si) thin film transistors (TFTs) is presented. By exploiting current feedback, a transresistance amplifier as column driver, and an accelerating current pulse, the driving scheme provides fast programming and low sensitivity of OLED current to shift in V T in a-Si TFTs. Prototypes of the pixel circuit and the transresistance amplifier were fabricated in an a-Si TFT process and a 0.8-mum 20-V CMOS technology. Measurements show less than 5% change in the OLED current for 2.5 V shift in V T . Settling times smaller than 70 mus were achieved for programming currents as small as 100 nA
ISSN:0886-5930
2152-3630
DOI:10.1109/CICC.2006.320873