In-plane switching of a twisted-nematic liquid crystal cell for single-cellgap transflective display

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

doi:10.1117/12.764194

29 January 2008 In-plane switching of a twisted-nematic liquid crystal cell for single-cellgap transflective display

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

Author Affiliations +

Proceedings Volume 6911, Emerging Liquid Crystal Technologies III; 691103 (2008) https://doi.org/10.1117/12.764194
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

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.

Citation Download Citation

Tae-Hoon Yoon, Gak Seok Lee, Jeong Hyun Lee, Dong Han Song, Jae Chang Kim, Dae Lim Park, Seong Soo Hwang, Dae Hyun Kim, and Sung Il Park "In-plane switching of a twisted-nematic liquid crystal cell for single-cellgap transflective display", Proc. SPIE 6911, Emerging Liquid Crystal Technologies III, 691103 (29 January 2008); https://doi.org/10.1117/12.764194

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