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33.2: Study of the Dynamics of the Disclinations of Reflective TN‐LCDS by Using a High‐Resolution Digital Camera
Author(s) -
Ho K. C.,
Lu M.
Publication year - 1999
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 - 10.1889/1.1834133
Subject(s) - pixel , optics , intensity (physics) , physics , tilt (camera) , liquid crystal display , inversion (geology) , photodiode , materials science , image resolution , geometry , geology , mathematics , paleontology , structural basin
A study of the dynamic evolution of disclinations in a liquid crystal display is reported for the first time. Using a high resolution digital camera, the case of the disclinations in a normally black, reflective, TN cell under column inversion driving is studied. It is found that the distorted fringe field dominated regions are independent of the pixel pitch, while the switching of the central portion of the normal domain is affected by the pitch of the pixels. For the pixels larger than 20um, the reflectivity of the central portion is comparable to the intensity at frame inversion. The intensity loss is mainly due to fringe field regions. For 10um pixel, the normal tilt domain is hardly switched due to strong influence of fringe field, resulting in a substantial loss in intensity. We describe a pixel switching model of the average display intensity that agrees reasonably well with the large area intensity measured by thez photodiode.