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10.4: Image Stability in Active‐Matrix Microencapsulated Electrophoretic Displays
Author(s) -
Webber Richard M.
Publication year - 2002
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 - 10.1889/1.1830177
Subject(s) - stability (learning theory) , electrophoresis , lightness , image (mathematics) , matrix (chemical analysis) , metric (unit) , materials science , color balance , biological system , computer vision , artificial intelligence , computer science , mathematics , nanotechnology , chemistry , chromatography , engineering , image processing , color image , composite material , biology , operations management , machine learning
Image stability, that is the unpowered maintenance of any desired lightness state over time, is essential to the development of ultra‐low power information appliance displays. In this paper, we quantify the image stability of displays made with microencapsulated electrophoretic materials. We describe a metric for image stability and show that the image stability for the saturated black and white states of current electrophoretic materials used in active‐matrix displays is at least of order 10 6 s. Image stability is also demonstrated for grayscales, i.e., lightnesses intermediate to those of the saturated states, and we show that it is maintained when subjected to temperature variations over a typical operating range of 0 to 50 °C.