Abstract

A new proposed gate-bias voltage-generating technique with threshold-voltage compensation for analog circuits in the low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) is proposed. The new proposed gate-bias voltage-generating circuit with threshold-voltage compensation has been successfully verified in an 8-μm LTPS process. The experimental results have shown that the impact of TFT threshold-voltage variation on the biasing circuit can be reduced from 30% to 5% under a biasing voltage of 3 V. The new proposed gate-bias voltage-generating technique with threshold-voltage compensation enables the analog circuits to be integrated and implemented by the LTPS process on glass substrate for an active matrix LCD panel.

© 2007 IEEE

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  1. H. G. Yang, S. Fluxman, C. Reita, P. Migliorato, "Design, measurement and analysis of CMOS polysilicon TFT operational amplifiers," IEEE J. Solid-State Circuits 29, 727-732 (1994).
  2. T. Matsuo, T. Muramatsu, "CG silicon technology and development of system on panel," SID Tech. Dig. (2004) pp. 856-859.
  3. Y. Matsueda, R. Kakkad, Y. S. Park, H. H. Yoon, W. P. Lee, J. B. Koo, H. K. Chung, "2.5-in. AMOLED with integrated 6-bit gamma compensated digital data driver," SID Tech. Dig. (2004) pp. 1116-1119.
  4. K. Yoneda, R. Yokoyama, T. Yamada, "Development trends of LTPS TFT LCDs for mobile application," Symp. VLSI Circuits, Dig. Tech. Papers (2001) pp. 85-90.
  5. R. M. A. Dawson, Z. Shen, M. G. Kanem, R. G. Stewart, C. N. King, P. J. Green, R. T. Flegal, S. Pearson, W. A. Barrow, E. Dickey, K. Ping, C. W. Tang, S. Van Slyke, F. Chen, J. C. Sturm, M. H. Lu, "Design of an improved pixel for a ploy silicon active matrix organic light emitting diode display," SID Tech. Dig. (1998) pp. 11-14.
  6. Y. Hashimoto, S. Saito, K. Yoshida, "An LCD driver LSI for full-color and high resolution TFT-LCD," NEC Res. Develop. 35, 30-37 (1994).
  7. M.-D. Ker, C.-K. Deng, J.-L. Huang, "On-panel design technique of threshold voltage compensation for output buffer in LTPS technology," J. Display Technol. 2, 153-159 (2006).
  8. H.-J. Chung, S.-W. Lee, C.-H. Han, "Poly-Si TFT push-pull analogue buffer for integrated data drivers of poly-Si TFT-LCDs," Electron. Lett. 37, 1093-1095 (2001).
  9. C. Yoo, D.-J. Kim, K.-L. Lee, "Threshold voltage and mobility mismatch compensated analogue buffer for driver-integrated poly-Si TFT LCDs," Electron. Lett. 41, 65-66 (2005).
  10. P. Madeira, R. Hornsey, "Analog circuit design using amorphous silicon thin film transistors," Proc. IEEE Canad. Conf. Elect. Comput. Eng. (1997) pp. 633-636.
  11. P. R. Gray, P. J. Hurst, S. H. Lewis, P. G. Meyer, Analysis and Design of Analog Integrated Circuits (Wiley, 2001) pp. 307-313.

2006 (1)

M.-D. Ker, C.-K. Deng, J.-L. Huang, "On-panel design technique of threshold voltage compensation for output buffer in LTPS technology," J. Display Technol. 2, 153-159 (2006).

2005 (1)

C. Yoo, D.-J. Kim, K.-L. Lee, "Threshold voltage and mobility mismatch compensated analogue buffer for driver-integrated poly-Si TFT LCDs," Electron. Lett. 41, 65-66 (2005).

2001 (1)

H.-J. Chung, S.-W. Lee, C.-H. Han, "Poly-Si TFT push-pull analogue buffer for integrated data drivers of poly-Si TFT-LCDs," Electron. Lett. 37, 1093-1095 (2001).

1994 (2)

H. G. Yang, S. Fluxman, C. Reita, P. Migliorato, "Design, measurement and analysis of CMOS polysilicon TFT operational amplifiers," IEEE J. Solid-State Circuits 29, 727-732 (1994).

Y. Hashimoto, S. Saito, K. Yoshida, "An LCD driver LSI for full-color and high resolution TFT-LCD," NEC Res. Develop. 35, 30-37 (1994).

Electron. Lett. (2)

H.-J. Chung, S.-W. Lee, C.-H. Han, "Poly-Si TFT push-pull analogue buffer for integrated data drivers of poly-Si TFT-LCDs," Electron. Lett. 37, 1093-1095 (2001).

C. Yoo, D.-J. Kim, K.-L. Lee, "Threshold voltage and mobility mismatch compensated analogue buffer for driver-integrated poly-Si TFT LCDs," Electron. Lett. 41, 65-66 (2005).

IEEE J. Solid-State Circuits (1)

H. G. Yang, S. Fluxman, C. Reita, P. Migliorato, "Design, measurement and analysis of CMOS polysilicon TFT operational amplifiers," IEEE J. Solid-State Circuits 29, 727-732 (1994).

J. Display Technol. (1)

M.-D. Ker, C.-K. Deng, J.-L. Huang, "On-panel design technique of threshold voltage compensation for output buffer in LTPS technology," J. Display Technol. 2, 153-159 (2006).

NEC Res. Develop. (1)

Y. Hashimoto, S. Saito, K. Yoshida, "An LCD driver LSI for full-color and high resolution TFT-LCD," NEC Res. Develop. 35, 30-37 (1994).

Other (6)

T. Matsuo, T. Muramatsu, "CG silicon technology and development of system on panel," SID Tech. Dig. (2004) pp. 856-859.

Y. Matsueda, R. Kakkad, Y. S. Park, H. H. Yoon, W. P. Lee, J. B. Koo, H. K. Chung, "2.5-in. AMOLED with integrated 6-bit gamma compensated digital data driver," SID Tech. Dig. (2004) pp. 1116-1119.

K. Yoneda, R. Yokoyama, T. Yamada, "Development trends of LTPS TFT LCDs for mobile application," Symp. VLSI Circuits, Dig. Tech. Papers (2001) pp. 85-90.

R. M. A. Dawson, Z. Shen, M. G. Kanem, R. G. Stewart, C. N. King, P. J. Green, R. T. Flegal, S. Pearson, W. A. Barrow, E. Dickey, K. Ping, C. W. Tang, S. Van Slyke, F. Chen, J. C. Sturm, M. H. Lu, "Design of an improved pixel for a ploy silicon active matrix organic light emitting diode display," SID Tech. Dig. (1998) pp. 11-14.

P. Madeira, R. Hornsey, "Analog circuit design using amorphous silicon thin film transistors," Proc. IEEE Canad. Conf. Elect. Comput. Eng. (1997) pp. 633-636.

P. R. Gray, P. J. Hurst, S. H. Lewis, P. G. Meyer, Analysis and Design of Analog Integrated Circuits (Wiley, 2001) pp. 307-313.

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