Ultrafast switching of randomly-aligned nematic liquid crystals.
We propose an ultrafast nematic liquid crystal (LC) device without alignment layers, where both the dark and bright states can be realized by applying an electric field. A vertical electric field is applied to vertically align the LCs for the dark state, whereas an in-plane electric field is applied to homogeneously align the LCs for the bright state. We achieved a total response time of less than 3 ms in the proposed device. This device may contribute, not only to a significant improvement of the switching speed in liquid crystal devices, but also to the simplification of the device fabrication by the omission of the alignment layer coating and the rubbing process.
Department of Electronics Engineering, Pusan National University, Busan 609-735, South Korea 2Samsung Electronics Co, Ltd, Gyeonggi-do 446-711, South Korea.
Dong Han
DH
Song
Jung-Wook
JW
Kim
Ki-Han
KH
Kim
Soon Joon
SJ
Rho
Hyeokjin
H
Lee
Heeseop
H
Kim
Tae-Hoon
TH
Yoon
D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D050866:Liquid Crystals / Q000737:chemistry* / Q000528:radiation effects*; D008422:Materials Testing; D011829:Radiation Dosage; D012031:Refractometry / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*