OSA's Digital Library

Journal of Display Technology

Journal of Display Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 5, Iss. 7 — Jul. 1, 2009
  • pp: 257–264

A Driving Scheme for Active-Matrix Organic Light-Emitting Diode Displays Based on Current Feedback

Shahin J. Ashtiani and Arokia Nathan

Journal of Display Technology, Vol. 5, Issue 7, pp. 257-264 (2009)


View Full Text Article

Acrobat PDF (1014 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

This paper presents a method of driving active-matrix organic light-emitting diode (AMOLED) displays with amorphous silicon (a-Si) thin-film transistors (TFTs). By using current feedback, the method effectively compensates for the effect of shift in the threshold voltage $(V_{T})$ of a-Si TFTs on the OLED current. A CMOS transresistance amplifier is used as the column driver to cancel the effect of large parasitic capacitance of data lines. An accelerating pulse is used at the start of the programming cycle to improve the settling at low currents. A detailed analysis has been done to investigate the effect of circuit components on the sensitivity of the OLED current to $V_{T}$ shift and the settling behavior of the circuit. Prototypes of pixel circuits and the transresistance amplifier were fabricated in an a-Si TFT process and a 0.8-$\mu{\hbox{m}}$ 20-V CMOS technology, respectively. Measurements show less than 5% change in the OLED current for 2.5-V shift in $V_{T}$ of TFTs. Settling times smaller than 50 $\mu{\hbox{s}}$ were achieved for parasitic capacitances of 50–200 pF and programming currents as small as 200 nA.

© 2009 IEEE

Citation
Shahin J. Ashtiani and Arokia Nathan, "A Driving Scheme for Active-Matrix Organic Light-Emitting Diode Displays Based on Current Feedback," J. Display Technol. 5, 257-264 (2009)
http://www.opticsinfobase.org/jdt/abstract.cfm?URI=jdt-5-7-257


Sort:  Year  |  Journal  |  Reset

References

  1. G. Gu, S. R. Forrest, "Design of flat-panel displays based on organic light-emitting devices," IEEE J. Sel. Topics in Quantum Electron. 4, 83-99 (1998).
  2. J. N. Bardsley, "International OLED technology roadmap," IEEE J. Sel. Topics in Quantum Electron. 10, 3-9 (2004).
  3. M. A. Baldo, D. F. O'brien, Y. You, A. Shoustikov, S. Sibley, M. E. Thompson, S. R. Forrest, "Highly efficient phosphorescent emission from organic electroluminescent devices," Nature 395, 151 (1998).
  4. M. Stewart, R. S. Howell, L. Dires, K. Hatalis, "Polysilicon TFT technology for active matrix OLED displays," IEEE Trans. Electron Devices 48, 845-851 (2001).
  5. C. D. Dimitrakopoulos, P. R. L. Malenfant, "Organic thin film transistors for large area electronics," Adv. Mater. 14, 99-117 (2002).
  6. M. J. Powell, "The physics of amorphous-silicon thin-film transistors," IEEE Trans. Electron Devices 36, 2753-2763 (1989).
  7. M. J. Powell, C. van Berkel, J. R. Hughes, "Time and temperature dependence of instability mechanisms in amorphous silicon thin-film transistors," App. Phys. Lett. 54, 1323-1325 (1989).
  8. A. Kumar, A. Nathan, G. E. Jabbour, "Does TFT mobility impact pixel size in AMOLED backplanes?," IEEE Trans. Electron Devices 52, 2386-2394 (2005).
  9. Y. He, R. Hattori, J. Kanicki, "Current-source a-Si:H thin-film transistor circuit for active-matrix organic light-emitting displays," IEEE Electron Device Lett. 21, 590-592 (2000).
  10. A. Nathan, A. Kumar, K. Sakariya, P. Servati, S. Sambandan, D. Striakhilev, "Amorphous silicon thin film transistor circuit integration for organic LED displays on glass and plastic," IEEE J. Solid-State Circuits 39, 215-222 (2003).
  11. S. J. Ashtiani, P. Servati, D. Striakhilev, A. Nathan, "A 3-TFT current-programmed pixel circuit for active-matrix organic light-emitting diode displays," IEEE Trans. Electron Devices 52, 1514-1518 (2005).
  12. S. Ono, Y. Kobayashi, "An accelerative current-programming method for AM-OLED," IEICE Trans. Electronics E88-C, 264-269 (2005).
  13. A. Nathan, G. R. Chaji, S. J. Ashtiani, "Driving schemes for a-Si and LTPS AMOLED displays," J. Display Technol. 1, 267-277 (2005).
  14. J. Goh, H.-J. Chung, J. Jang, "A new pixel circuit for active matrix organic light emitting diodes," IEEE Electron Device Lett. 23, 544-546 (2002).
  15. J. Goh, J. Jang, K. Cho, C. Kim, "A new a-Si:H thin-film transistor pixel circuits for active matrix organic light-emitting diodes," IEEE Electron Device. Lett. 24, 583-585 (2003).
  16. S. Jafarabadiashtiani, "A new driving method for a-Si AMOLED displays based on voltage feedback," SID Int. Symp. Dig. Tech. Papers, (2005) pp. 316-317.
  17. S. J. Ashtiani, A. Nathan, "A fast driving scheme for a-Si:H AMOLED displays based on voltage feedback," Proc Annu. Meeting LEOS 2005 (2005) pp. 925-926.
  18. S. J. Ashtiani, A. Nathan, "A driving scheme for AMOLED display based on current feedback," Proc. IEEE Custom Integr. Circuits Conf. (2006) pp. 289-292.

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited