Fringe field switching of a twisted nematic liquid crystal device for a single-cell-gap transflective display.
We propose an optical configuration of a twisted nematic liquid crystal device driven by a fringe field for a single-cell-gap transflective display. The dark state of the reflective part is realized by a nematic liquid crystal layer with a twist angle of 63.6 degrees and retardation of 194 nm, while a quarter-wave plate is inserted for the dark state of the transmissive part. Wavelength dispersion of the liquid crystal layer is suppressed by introducing a half-wave plate. Different directions of electric fields rotate liquid crystals to 15 degrees for the bright state of the reflective part, but to -30 degrees for that of the transmissive part. With the proposed configuration, we can realize a high-brightness single-gamma transflective display in a single-cell-gap structure without any in-cell retardation layers.
Lee
Gak Seok
GS
School of Electrical Engineering, Pusan National University, Busan, South Korea.
Lee
Jeong Hyun
JH
Song
Dong Han
DH
Kim
Jae Chang
JC
Yoon
Tae-Hoon
TH
Park
Dae Lim
DL
Hwang
Seong Soo
SS
Kim
Dae Hyun
DH
Park
Sung Il
SI