Abstract

To overcome the offset voltage (V<sub>OS</sub>) of output buffer due to large variation on characteristics of thin-film transistor (TFT) in low-temperature polysilicon (LTPS) technology, a class-B output buffer with offset compensation circuit for the data driver is presented in this paper. This proposed class-B output buffer can operate at 50-kHz operation frequency with a 2-8-V output swing for extended graphic array (XGA) application, and it has been demonstrated in 3-µm LTPS technology. Using the offset compensation technique, the V<sub>OS</sub> of output buffer can be controlled within ±100 mV under 2-to-8 V signal operation to achieve a high resolution and quality liquid crystal display (LCD) panel.

© 2006 IEEE

PDF Article

References

  • View by:
  • |

  1. K. Chung, M.-P. Hong, C.-W. Kim, I. Kang, "Needs and solutions of future flat panel display for information technology industry," IEDM Tech. Dig. (2002) pp. 385-388.
  2. 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.
  3. T. Mizuki, J. S. Matsuda, Y. Nakamura, J. Takagi, T. Yoshida, "Large domains of continuous grain silicon on glass substrate for high-performance TFTs," IEEE Trans. Electron Devices 51, 204-211 (2004).
  4. S. Higashi, D. Abe, Y. Hiroshima, K. Miyashita, T. Kawamura, S. Inoue, T. Shimoda, "Development of high-performance polycrystalline silicon thin-film transistors (TFTs) using defect control process technologies," IEEE Electron Device Lett. 23, 407-409 (2002).
  5. A.-J. Annema, B. Nauta, R. V. van Langevelde, H. Tuinhout, "Analog circuit in ultra-deep-submicron CMOS," IEEE J. Solid-State Circuits 40, 132-143 (2005).
  6. P.-C. Yu, T.-C. Wu, "A class-B output buffer for flat-panel-display column driver," IEEE J. Solid-State Circuits 34, 116-119 (1999).
  7. C.-W. Lu, "A low-power high speed class-AB buffer amplifier for flat-panel-display application," SID, Dig. Tech. Papers (2000) pp. 281-283.
  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. S. Maeda, S. Maegawa, T. Ipposhi, H. Kuriyama, M. Ashida, Y. Inoue, H. Miyoshi, A. Yasuoka, "An analytical method of evaluating variation of the threshold voltage shift caused by the negative-bias temperature stress in poly-Si TFTs," IEEE Trans. Electron Devices 45, 165-172 (1998).
  11. M.-D. Ker, C.-K. Deng, J.-L. Huang, "On-panel design technique of threshold voltage compensation for output buffer in LTPS technology," SID, Dig. Tech. Papers (2005) pp. 288-291.
  12. K. Sera, F. Okumara, H. Uchida, S. Itoh, S. Kaneko, K. Hotta, "High-performance TFTs fabricated by XeCl excimer laser annealing of hydrogenated amorphous-silicon film," IEEE Trans. Electron Devices 36, 2868-2872 (1989).
  13. K. Pangal, J. C. Sturm, S. Wagner, "Hydrogen plasma-enhanced crystallization of amorphous silicon for low-temperature polycrystalline silicon TFTs," IEDM Tech. Dig. (1998) pp. 261-264.
  14. TFT-LCD Driver IC—Data Book Samsung Electronics,YonginKorea (1998).
  15. R. Gregorian, Introduction to CMOS OP-AMPS and Comparators (Wiley, 1999).

Electron. Lett.

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 Trans. Electron Devices

T. Mizuki, J. S. Matsuda, Y. Nakamura, J. Takagi, T. Yoshida, "Large domains of continuous grain silicon on glass substrate for high-performance TFTs," IEEE Trans. Electron Devices 51, 204-211 (2004).

IEEE Electron Device Lett.

S. Higashi, D. Abe, Y. Hiroshima, K. Miyashita, T. Kawamura, S. Inoue, T. Shimoda, "Development of high-performance polycrystalline silicon thin-film transistors (TFTs) using defect control process technologies," IEEE Electron Device Lett. 23, 407-409 (2002).

IEEE J. Solid-State Circuits

A.-J. Annema, B. Nauta, R. V. van Langevelde, H. Tuinhout, "Analog circuit in ultra-deep-submicron CMOS," IEEE J. Solid-State Circuits 40, 132-143 (2005).

P.-C. Yu, T.-C. Wu, "A class-B output buffer for flat-panel-display column driver," IEEE J. Solid-State Circuits 34, 116-119 (1999).

IEEE Trans. Electron Devices

S. Maeda, S. Maegawa, T. Ipposhi, H. Kuriyama, M. Ashida, Y. Inoue, H. Miyoshi, A. Yasuoka, "An analytical method of evaluating variation of the threshold voltage shift caused by the negative-bias temperature stress in poly-Si TFTs," IEEE Trans. Electron Devices 45, 165-172 (1998).

K. Sera, F. Okumara, H. Uchida, S. Itoh, S. Kaneko, K. Hotta, "High-performance TFTs fabricated by XeCl excimer laser annealing of hydrogenated amorphous-silicon film," IEEE Trans. Electron Devices 36, 2868-2872 (1989).

Other

K. Pangal, J. C. Sturm, S. Wagner, "Hydrogen plasma-enhanced crystallization of amorphous silicon for low-temperature polycrystalline silicon TFTs," IEDM Tech. Dig. (1998) pp. 261-264.

TFT-LCD Driver IC—Data Book Samsung Electronics,YonginKorea (1998).

R. Gregorian, Introduction to CMOS OP-AMPS and Comparators (Wiley, 1999).

K. Chung, M.-P. Hong, C.-W. Kim, I. Kang, "Needs and solutions of future flat panel display for information technology industry," IEDM Tech. Dig. (2002) pp. 385-388.

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.

M.-D. Ker, C.-K. Deng, J.-L. Huang, "On-panel design technique of threshold voltage compensation for output buffer in LTPS technology," SID, Dig. Tech. Papers (2005) pp. 288-291.

C.-W. Lu, "A low-power high speed class-AB buffer amplifier for flat-panel-display application," SID, Dig. Tech. Papers (2000) pp. 281-283.

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.