Abstract

We have developed a high-transmittance in-plane switching (HT-IPS) liquid crystal display (LCD) using special electrode design on the same substrate. The featured electrode configuration generates substantial horizontal electric fields between the electrode groups, and fringe fields with rich horizontal components within the regions of electrode groups. The former is similar to the IPS mode and the latter is similar to the fringe-field switching (FFS) mode. The HT-IPS mode exhibits a high transmittance (>90% of twisted nematic (TN) mode), as well as wide viewing angle for cells using both positive and negative dielectric anisotropy LC materials. In addition, we also compare the electro-optical performance of the HT-IPS with IPS and FFS cells under the same conditions.

© 2006 IEEE

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  2. M. Ohe, K. Kondo, "Electro-optical characteristics and switching behavior of the in-plane switching mode," Appl. Phys. Lett. 67, 3895-3897 (1995).
  3. M. Schadt, W. Helfrich, "Voltage-dependent optical activity of a twisted nematic liquid crystal," Appl. Phys. Lett. 18, 127-128 (1971).
  4. S. H. Lee, S. L. Lee, H. Y. Kim, "Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching," Appl. Phys. Lett. 73, 2881-2883 (1998).
  5. S. H. Lee, S. M. Lee, H. Y. Kim, J. M. Kim, S. H. Hong, Y. H. Jeong, C. H. Park, Y. J. Choi, J. Y. Lee, J. W. Koh, H. S. Park, "18.1 ' Ultra-FFS TFT-LCD with super image quality and fast response time," SID Symp. Dig. (2001) pp. 485-487.
  6. Y. M. Jeon, I. S. Song, S. H. Lee, H. Y. Kim, S. Y. Kim, Y. J. Lim, "Optimized electrode design to improve transmittance in the fringe-field switching (FFS) liquid crystal cell," SID Symp. Dig. (2005) pp. 328-331.
  7. Autronic-MELCHERS GmbH http://www.autronic-melchers.com/.
  8. A. Lien, "Extended Jones matrix representation for the twisted nematic liquid-crystal display at oblique incidence," Appl. Phys. Lett. 57, 2767-2769 (1990).
  9. R. Lu, X. Zhu, S. T. Wu, Q. Hong, T. X. Wu, "Ultra wide view liquid crystal displays," J. Display Technology 1, 3-14 (2005).
  10. X. Zhu, Z. Ge, S. T. Wu, "Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays," J. Display Technol. 2, 2-20 (2006).
  11. Z. Ge, X. Zhu, S. T. Wu, T. X. Wu, High transmittance and wide viewing angle liquid crystal display devices (2005) U.S. Patent Appl. pending.

Appl. Phys. Lett.

A. Lien, "Extended Jones matrix representation for the twisted nematic liquid-crystal display at oblique incidence," Appl. Phys. Lett. 57, 2767-2769 (1990).

Appl. Phys. Lett.

M. Ohe, K. Kondo, "Electro-optical characteristics and switching behavior of the in-plane switching mode," Appl. Phys. Lett. 67, 3895-3897 (1995).

M. Schadt, W. Helfrich, "Voltage-dependent optical activity of a twisted nematic liquid crystal," Appl. Phys. Lett. 18, 127-128 (1971).

S. H. Lee, S. L. Lee, H. Y. Kim, "Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching," Appl. Phys. Lett. 73, 2881-2883 (1998).

J. Appl. Phys.

R. A. Soref, "Field effects in nematic liquid crystals obtained with interdigital electrodes," J. Appl. Phys. 45, 5466-5468 (1974).

J. Display Technol.

X. Zhu, Z. Ge, S. T. Wu, "Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays," J. Display Technol. 2, 2-20 (2006).

J. Display Technology

R. Lu, X. Zhu, S. T. Wu, Q. Hong, T. X. Wu, "Ultra wide view liquid crystal displays," J. Display Technology 1, 3-14 (2005).

Other

Z. Ge, X. Zhu, S. T. Wu, T. X. Wu, High transmittance and wide viewing angle liquid crystal display devices (2005) U.S. Patent Appl. pending.

S. H. Lee, S. M. Lee, H. Y. Kim, J. M. Kim, S. H. Hong, Y. H. Jeong, C. H. Park, Y. J. Choi, J. Y. Lee, J. W. Koh, H. S. Park, "18.1 ' Ultra-FFS TFT-LCD with super image quality and fast response time," SID Symp. Dig. (2001) pp. 485-487.

Y. M. Jeon, I. S. Song, S. H. Lee, H. Y. Kim, S. Y. Kim, Y. J. Lim, "Optimized electrode design to improve transmittance in the fringe-field switching (FFS) liquid crystal cell," SID Symp. Dig. (2005) pp. 328-331.

Autronic-MELCHERS GmbH http://www.autronic-melchers.com/.

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