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11.1: Invited Paper : Switchable Reflective Displays Formed from Holographic Polymer‐Dispersed Liquid Crystals (H‐PDLCs)
Author(s) -
Bunning Timothy J.,
Natarajan Lalgudi V.,
Sutherland Richard L.,
Tondiglia Vincent P.
Publication year - 2000
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1832885
Subject(s) - holography , materials science , reflection (computer programming) , photopolymer , optoelectronics , liquid crystal , polymer , nanoscopic scale , optics , microsecond , nanotechnology , composite material , computer science , polymerization , physics , programming language
Holographically formed polymer dispersed liquid crystals (H‐PDLC) films show excellent promise in the development of switchable transmissive and reflective diffractive optical elements. The use of holographic photopolymerization allows for the development of spatially periodic gratings of nano‐scale sized LC domains. Reflection gratings exhibiting blue, green or red colors can be routinely fabricated and electrical switching has been demonstrated. Reflective H‐PDLCs have been investigated in terms of their electro‐optical performance parameters and their potential as a viable display system. These films exhibit low switching fields, high contrast ratios, high transmission in the on and off states and fast switching speeds on the order of microseconds. The state of the art performance levels and existing challenges in this new technology are broadly discussed.