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Proceedings Paper

In-plane switching of a twisted-nematic liquid crystal cell for single-cellgap transflective display
Author(s): Tae-Hoon Yoon; Gak Seok Lee; Jeong Hyun Lee; Dong Han Song; Jae Chang Kim; Dae Lim Park; Seong Soo Hwang; Dae Hyun Kim; Sung Il Park
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Paper Abstract

We propose an optical configuration of a twisted-nematic liquid crystal (TNLC) device driven by an in-plane electric field for a single-cellgap transflective display. The dark state of the reflective part is realized by a nematic liquid crystal layer with the twisted angle of 63.6° and the retardation of 194 nm, while a quarter-wave plate is inserted for the dark state of the transmissive part. Wavelength dispersion of the TNLC layer is suppressed by introducing a half-wave plate, whose optimum angle is found by using the Muller matrix method. Different directions of electric fields rotate liquid crystals to 15° for the bright state of the reflective part, but to -30° for that of the transmissive part. With the proposed configuration, we can realize a single-gamma transflective display in single cellgap structure without any in-cell retardation layers. By fabricating a 2.0" qCIF+ (176×RGB×220) prototype panel, we demonstrated both high reflection/transmission and single gamma of the proposed configuration.

Paper Details

Date Published: 29 January 2008
PDF: 8 pages
Proc. SPIE 6911, Emerging Liquid Crystal Technologies III, 691103 (29 January 2008); doi: 10.1117/12.764194
Show Author Affiliations
Tae-Hoon Yoon, Pusan National Univ. (South Korea)
Gak Seok Lee, Pusan National Univ. (South Korea)
Jeong Hyun Lee, Pusan National Univ. (South Korea)
Dong Han Song, Pusan National Univ. (South Korea)
Jae Chang Kim, Pusan National Univ. (South Korea)
Dae Lim Park, L.G. Philips LCD (South Korea)
Seong Soo Hwang, L.G. Philips LCD (South Korea)
Dae Hyun Kim, L.G. Philips LCD (South Korea)
Sung Il Park, L.G. Philips LCD (South Korea)

Published in SPIE Proceedings Vol. 6911:
Emerging Liquid Crystal Technologies III
Liang-Chy Chien, Editor(s)

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