Abstract

This work presents a new external driving scheme that uses the current feedback method with a 3T1C pixel circuit. The proposed circuit provides a stable OLED driving current by compensating for the threshold voltage shift of amorphous-silicon thin-film transistors (a-Si TFTs). For fabricated a-Si TFTs and the 0.35 $\mu$m CMOS process associated with the proposed driving scheme, measurements reveal that the normalized OLED current degradation is less than 5% after 60 hours of operation at 60 $^{\circ}$C. Moreover, for a data line load of 1.69 K$\Omega$/110 pF, the relative error rates between data currents and OLED currents are less than 4% within a settling time of 19 $\mu{{s}}$.

© 2013 IEEE

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  1. A. Nathan, G. R. Chaji, S. J. Ashtiani, "Driving schemes for a-Si and LTPS AMOLED displays," J. Display Technol. 1, 267-277 (2005).
  2. H. J. In, O. K. Kwon, "External compensation of nonuniform electrical characteristics of thin-film transistors and degradation of OLED devices in AMOLED displays," IEEE Electron Device Lett. 30, 377-379 (2009).
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  5. J. H. Lee, W. J. Nam, S. H. Jung, M. K. Han, "A new current scaling pixel circuit for AMOLED," IEEE Electron Device Lett. 25, 280-282 (2004).
  6. S. J. Ashtiani, A. Nathan, "A driving scheme for active-matrix organic light-emitting diode displays based on feedback," J. Display Tech. 2, 258-264 (2006).
  7. S. J. Ashtiani, A. Nathan, "A driving scheme for active-matrix organic light-emitting diode displays based on current feedback," J. Display Tech. 5, 257-264 (2009).
  8. J. Y. Jeon, Y. J. Jeon, Y. S. Son, G. H. Cho, "A double zeros compensated direct fast feedback current driver for medium to large AMOLED displays," IEEE Trans. Circuits Syst. I, Reg. Papers 59, 2197-2209 (2012).
  9. C. C. Wu, C. W. Chen, C. L. Lin, C. J. Yang, "Advanced organic light emitting devices for enhancing display performances," J. Display Technol. 1, 248-266 (2005).
  10. C. L. Lin, C. C. Hung, W. Y. Chang, M. H. Cheng, P. Y. Kuo, Y. C. Chen, "Voltage driving scheme using three TFTs and one capacitor for active-matrix organic light-emitting diode pixel circuits," J. Display Technol. 8, 602-608 (2012).
  11. B. H. You, J. H. Lee, M. K. Han, "Polarity balanced driving scheme to suppress the degradation of $V_{\rm th}$ in a-Si:H TFT due to the positive gate bias stress for AMOLED," J. Display Technol. 3, 40-44 (2007).

2012 (2)

J. Y. Jeon, Y. J. Jeon, Y. S. Son, G. H. Cho, "A double zeros compensated direct fast feedback current driver for medium to large AMOLED displays," IEEE Trans. Circuits Syst. I, Reg. Papers 59, 2197-2209 (2012).

C. L. Lin, C. C. Hung, W. Y. Chang, M. H. Cheng, P. Y. Kuo, Y. C. Chen, "Voltage driving scheme using three TFTs and one capacitor for active-matrix organic light-emitting diode pixel circuits," J. Display Technol. 8, 602-608 (2012).

2009 (2)

S. J. Ashtiani, A. Nathan, "A driving scheme for active-matrix organic light-emitting diode displays based on current feedback," J. Display Tech. 5, 257-264 (2009).

H. J. In, O. K. Kwon, "External compensation of nonuniform electrical characteristics of thin-film transistors and degradation of OLED devices in AMOLED displays," IEEE Electron Device Lett. 30, 377-379 (2009).

2007 (1)

2006 (2)

2005 (2)

C. C. Wu, C. W. Chen, C. L. Lin, C. J. Yang, "Advanced organic light emitting devices for enhancing display performances," J. Display Technol. 1, 248-266 (2005).

A. Nathan, G. R. Chaji, S. J. Ashtiani, "Driving schemes for a-Si and LTPS AMOLED displays," J. Display Technol. 1, 267-277 (2005).

2004 (1)

J. H. Lee, W. J. Nam, S. H. Jung, M. K. Han, "A new current scaling pixel circuit for AMOLED," IEEE Electron Device Lett. 25, 280-282 (2004).

2000 (1)

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).

IEEE Electron Device Lett. (1)

H. J. In, O. K. Kwon, "External compensation of nonuniform electrical characteristics of thin-film transistors and degradation of OLED devices in AMOLED displays," IEEE Electron Device Lett. 30, 377-379 (2009).

IEEE Electron Device Lett. (2)

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).

J. H. Lee, W. J. Nam, S. H. Jung, M. K. Han, "A new current scaling pixel circuit for AMOLED," IEEE Electron Device Lett. 25, 280-282 (2004).

IEEE Trans. Circuits Syst. I, Reg. Papers (1)

J. Y. Jeon, Y. J. Jeon, Y. S. Son, G. H. Cho, "A double zeros compensated direct fast feedback current driver for medium to large AMOLED displays," IEEE Trans. Circuits Syst. I, Reg. Papers 59, 2197-2209 (2012).

J. Display Technol. (1)

C. C. Wu, C. W. Chen, C. L. Lin, C. J. Yang, "Advanced organic light emitting devices for enhancing display performances," J. Display Technol. 1, 248-266 (2005).

J. Display Tech. (2)

S. J. Ashtiani, A. Nathan, "A driving scheme for active-matrix organic light-emitting diode displays based on feedback," J. Display Tech. 2, 258-264 (2006).

S. J. Ashtiani, A. Nathan, "A driving scheme for active-matrix organic light-emitting diode displays based on current feedback," J. Display Tech. 5, 257-264 (2009).

J. Display Technol. (4)

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