Abstract

A thorough study on the gate driver integrated with hydrogenated amorphous-silicon thin-film transistors (a-Si:H TFTs) for active-matrix flat-panel display (AM-FPD) is carried out in this work. The single stage circuit of the a-Si:H gate driver consists of input, pull-up, pull-down, and low-level holding units. The operation principle of the driver is described in detail. The subtle static and dynamic characteristics of the a-Si:H TFT based circuit are analyzed systematically for the first time. The long term reliability issue is also addressed. Design equations for determining the device sizes of the circuit are derived. The TFT-LCD panels integrated with the designed gate driver are fabricated to verify the design efficiency.

© 2012 IEEE

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  2. A. Sazonov, D. Striakhilev, C. Lee, A. Nathan, "Low-temperature materials and thin film transistors for flexible electronics," Proc. IEEE 93, 1420-1428 (2005).
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  20. Y. H. Jang, H. Y. Kim, B. Kim, S. C. Choi, H. N. Cho, C. I. Ryoo, W. Choi, S. Y. Yoon, K. Park, T. Moon, N. W. Cho, C. Kim, "Scaling of a-Si TFT gate drivers," Proc. SID Symp. Dig. (2009) pp. 1088-1091.

2011 (1)

C. L. Lin, C. D. Tu, M. C. Chuang, J. S. Yu, "Design of bidirectional and highly stable integrated hydrogenated amorphous silicon gate driver circuits," J. Display Technol. 7, 10-18 (2011).

2010 (1)

J. W. Choi, J. I. Kim, S. H. Kim, J. Jang, "Highly reliable amorphous silicon gate driver using stable center-offset thin-film transistors," IEEE Trans. Electron Devices 57, 2330-2334 (2010).

2008 (1)

Y. H. Tai, M. H. Tsai, S. C. Huang, "The linear combination model for the degradation of amorphous silicon thin film transistors under drain AC stress," Jpn. J. Appl. Phys. 47, 6228-6235 (2008).

2007 (1)

Y. Ishii, "The world of liquid-crystal display TVs—Past, present, and future," J. Display Technol. 3, 351-360 (2007).

2006 (1)

B. S. Bae, J. W. Choi, J. H. Oh, J. Jang, "Level shifter embedded in drive circuits with amorphous silicon TFTs," IEEE Trans. Electron Devices 53, 494-498 (2006).

2005 (3)

A. Sazonov, D. Striakhilev, C. Lee, A. Nathan, "Low-temperature materials and thin film transistors for flexible electronics," Proc. IEEE 93, 1420-1428 (2005).

K. K. Moez, "Design of a-Si TFT de-multiplexers for driving gate lines in active matrix arrays," IEEE Trans. Electron Devices 52, 2806-2809 (2005).

K. Sakariya, C. K. M. Ng, P. Servati, A. Nathan, "Accelerated stress testing of a-Si:H pixel circuits for AMOLED displays," IEEE Trans. Electron Devices 52, 2577-2583 (2005).

2004 (1)

K. S. Karim, A. Nathan, M. Hack, W. I. Milne, "Drain-bias dependence of threshold voltage stability of amorphous silicon TFTs," IEEE Electron Device Lett. 25, 188-190 (2004).

2003 (1)

L. Reséndiz, M. Estrada, A. Cerdeira, "New procedure for the extraction of a-Si:H TFTs modelparameters in the subthreshold region," Solid-State Electron. 47, 1351-1358 (2003).

2001 (1)

A. Cerdeira, M. Estrada, R. García, A. Ortiz-Conde, F. J. García Sánchez, "New procedure for the extraction of basic a-Si:H TFT model parameters in the linear and saturation regions," Solid-State Electron. 45, 1077-1080 (2001).

IEEE Trans. Electron Devices (3)

K. K. Moez, "Design of a-Si TFT de-multiplexers for driving gate lines in active matrix arrays," IEEE Trans. Electron Devices 52, 2806-2809 (2005).

K. Sakariya, C. K. M. Ng, P. Servati, A. Nathan, "Accelerated stress testing of a-Si:H pixel circuits for AMOLED displays," IEEE Trans. Electron Devices 52, 2577-2583 (2005).

J. W. Choi, J. I. Kim, S. H. Kim, J. Jang, "Highly reliable amorphous silicon gate driver using stable center-offset thin-film transistors," IEEE Trans. Electron Devices 57, 2330-2334 (2010).

IEEE Electron Device Lett. (1)

K. S. Karim, A. Nathan, M. Hack, W. I. Milne, "Drain-bias dependence of threshold voltage stability of amorphous silicon TFTs," IEEE Electron Device Lett. 25, 188-190 (2004).

IEEE Trans. Electron Devices (1)

B. S. Bae, J. W. Choi, J. H. Oh, J. Jang, "Level shifter embedded in drive circuits with amorphous silicon TFTs," IEEE Trans. Electron Devices 53, 494-498 (2006).

J. Display Technol. (2)

Y. Ishii, "The world of liquid-crystal display TVs—Past, present, and future," J. Display Technol. 3, 351-360 (2007).

C. L. Lin, C. D. Tu, M. C. Chuang, J. S. Yu, "Design of bidirectional and highly stable integrated hydrogenated amorphous silicon gate driver circuits," J. Display Technol. 7, 10-18 (2011).

Jpn. J. Appl. Phys. (1)

Y. H. Tai, M. H. Tsai, S. C. Huang, "The linear combination model for the degradation of amorphous silicon thin film transistors under drain AC stress," Jpn. J. Appl. Phys. 47, 6228-6235 (2008).

Proc. IEEE (1)

A. Sazonov, D. Striakhilev, C. Lee, A. Nathan, "Low-temperature materials and thin film transistors for flexible electronics," Proc. IEEE 93, 1420-1428 (2005).

Solid-State Electron. (2)

A. Cerdeira, M. Estrada, R. García, A. Ortiz-Conde, F. J. García Sánchez, "New procedure for the extraction of basic a-Si:H TFT model parameters in the linear and saturation regions," Solid-State Electron. 45, 1077-1080 (2001).

L. Reséndiz, M. Estrada, A. Cerdeira, "New procedure for the extraction of a-Si:H TFTs modelparameters in the subthreshold region," Solid-State Electron. 47, 1351-1358 (2003).

Other (9)

J. W. Choi, M. S. Kwon, J. H. Koo, J. H. Park, S. H. Kim, D. H. Oh, S. Lee, J. Jang, "Noble a-Si:H gate driver with high stability," Proc. SID Symp. Dig. (2008) pp. 1227-1230.

Y. Lee, H. Park, S. Moon, T. Kim, K. Lee, B. H. Berkeley, S. Kim, "Advanced TFT-LCD data line reduction method," Proc. SID Symp. Dig. (2006) pp. 1083-1086.

H. Lebrun, T. Kretz, J. Magarino, N. Szydlo, "Design of integrated drivers with amorphous silicon TFTs for small displays: Basic concepts," Proc. SID Symp. Dig. (2005) pp. 950-953.

I. Hwang, S. Moh, M. Lee, E. Lee, "Design of integrated a-Si gate driver circuits for low power consumption," Proc. SID Symp. Dig. (2008) pp. 842-845.

J. H. Oh, J. H. Hur, Y. D. Son, K. M. Kim, S. H. Kim, E. H. Kim, J. W. Choi, S. M. Hong, J. O. Kim, B. S. Bae, J. Jang, "2.0 inch a-Si:H TFT-LCD with low noise integrated gate driver," Proc. SID Symp. Dig. (2005) pp. 942-945.

S. H. Moon, Y. S. Lee, M. C. Lee, B. H. Berkeley, N. D. Kim, S. S. Kim, "Integrated a-Si:H TFT gate driver circuits on large area TFT-LCDs," Proc. SID Symp. Dig. (2007) pp. 1478-1481.

D. Plus, Shift Register Useful as a Select Line Scanner for Liquid Crystal Display U. S. Patent 52 220 82 (1991).

SMART SPICE User's Manual SILVACO IncAustinTX1 and 2 (004) www.silvaco.com.

Y. H. Jang, H. Y. Kim, B. Kim, S. C. Choi, H. N. Cho, C. I. Ryoo, W. Choi, S. Y. Yoon, K. Park, T. Moon, N. W. Cho, C. Kim, "Scaling of a-Si TFT gate drivers," Proc. SID Symp. Dig. (2009) pp. 1088-1091.

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