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P‐106: Single‐Layer Multicolor Reflective Cholesteric Displays
Author(s) -
Lu ShinYing,
Golovin Andrii,
Chien LiangChy
Publication year - 2007
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 - 10.1889/1.2785373
Subject(s) - wavelength , electric field , materials science , optoelectronics , optics , planar , cholesteric liquid crystal , field (mathematics) , liquid crystal , physics , computer graphics (images) , mathematics , quantum mechanics , computer science , pure mathematics
We developed electrically switchable color reflective cholesteric displays based on polymer‐stabilized, short‐pitched cholesteric liquid crystals using electro‐optical cells with planar alignment. The devices enable the switching of a pre‐selected reflective wavelength of the cholesteric to reflect a different wavelength corresponding to the magnitude of applied electric field. The principle of the wavelength shift to a shorter wavelength is a result of field‐induced pitch shortening near the boundaries. It is shown that the polymer stabilized cholesteric cell has an asymmetric structure. One side of the cell reflects a certain wavelength which is tunable with electric field while the other side scatters light. The spectral wavelength shift of the reflected wavelength is about 150nm and the wavelength shift is linearly proportional to the magnitude of applied electric field.