OSA's Digital Library

Journal of Display Technology

Journal of Display Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 10, Iss. 5 — May. 1, 2014
  • pp: 345–351

An Enhanced Voltage Programming Pixel Circuit for Compensating GB-Induced Variations in Poly-Si TFTs for AMOLED Displays

Chih-Hsiang Ho, Chao Lu, and Kaushik Roy

Journal of Display Technology, Vol. 10, Issue 5, pp. 345-351 (2014)


View Full Text Article

Acrobat PDF (1462 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

The variation and reliability issues of display backplane pose major challenges for poly silicon (poly-Si) active matrix organic light-emitting diode (AMOLED) displays. Adjacent poly-Si thin-film transistors (TFTs) exhibit different threshold voltages and mobilities due to random distribution of grain boundaries (GBs). Furthermore, the threshold voltage and mobility of TFTs have noticeable shift in time because of electrical stress. In this study, we propose an improved voltage programming pixel circuit for compensating the shift of threshold voltage and mobility in driver TFTs (DTFTs) as well as compensating the supply voltage degradation. HSPICE simulation results demonstrate that the drive current for OLED has a deviation of less than $\pm$ 2% for a mobility variation of $\pm$ 40% and a maximum deviation of 30 nA when the threshold voltage varies from 0.3 to $-$ 0.3 V. Moreover, if the supply voltage degrades from 10 to 8.5 V, the drive current shift is less than 15%.

© 2014 IEEE

Citation
Chih-Hsiang Ho, Chao Lu, and Kaushik Roy, "An Enhanced Voltage Programming Pixel Circuit for Compensating GB-Induced Variations in Poly-Si TFTs for AMOLED Displays," J. Display Technol. 10, 345-351 (2014)
http://www.opticsinfobase.org/jdt/abstract.cfm?URI=jdt-10-5-345

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited