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6.3: Writable Cholesteric Liquid Crystal Display and the Algorithm Used to Detect its Image
Author(s) -
Lee D. W.,
Shiu J. W.,
Sha Y. A.,
Chang Y. P.
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 - 10.1889/1.2785226
Subject(s) - cholesteric liquid crystal , capacitance , pixel , liquid crystal , image (mathematics) , liquid crystal display , materials science , parasitic capacitance , state (computer science) , optics , algorithm , optoelectronics , computer science , computer vision , chemistry , physics , electrode
Writable Cholesteric Liquid Crystal Display and the algorithm used to detect its image were developed. We could use any hard tip, ex: the tip of a forefinger, to directly write an image on the surface of Cholesteric Liquid Crystal Display (CHLCD). By measuring the capacitance of one pixel of test cell (12mm × 15mm/ 1×1), F‐state or P‐state could be detected. By measuring the capacitance of one pixel of 4.1″ CHLCD (241um × 241um/ 320×320), F‐state or P‐state could not be detected, due to the effect of parasitic capacitance. Therefore, high frequency measurement and the algorithm were developed to detect the image on CHLCD.