title: Light shutter using dichroic-dye-doped long-pitch cholesteric liquid crystals.
abstract: We propose a light shutter device using dichroic-dye-doped liquid crystals (LCs) whose Bragg reflection wavelength is set to be infrared by controlling the pitch of cholesteric liquid crystals (ChLCs). A dye-doped long-pitch ChLC cell is switchable between the dark planar state and the transparent homeotropic state. It has the advantages of high transmittance, low operation voltage, and an easy fabrication process relative to previous LC light shutter devices. The proposed light shutter device is expected to achieve high visibility for transparent organic light-emitting diode displays and emerging smart windows, which can be used in airplanes, cars, and other similar applications.
authors: Byeong-Hun
authors: BH
authors: Yu
authors: Jae-Won
authors: JW
authors: Huh
authors: Ki-Han
authors: KH
authors: Kim
authors: Tae-Hoon
authors: TH
authors: Yoon
mesh_terms: D002942:Circular Dichroism / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D050866:Liquid Crystals / Q000737:chemistry* / Q000528:radiation effects; D010781:Photography / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*