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Optica Publishing Group
  • Journal of Display Technology
  • Vol. 7,
  • Issue 12,
  • pp. 684-687
  • (2011)

Viewing Angle and Voltage Dependence of the Visibility of Cell Gap Defects in LCD Panels

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Abstract

Perception of visible defects induced by local cell gap variations in liquid crystal display (LCD) panels is studied as a function of the viewing direction and applied voltage. Our results are reported in terms of the LCD sensitivity parameter Κ defined in our previous publication and can be readily used in conjunction with the psycho-physical models of Mura perception. We apply our methods to a particular example of a normally white TN LCD and show that the Mura visibility depends strongly on the viewing angle as well as the applied voltage. We conclude that a complete study of the Κ-parameter as a function of the viewing angle and applied voltage is crucial in the correct assessment of the sensitivity of an LCD panel to cell gap variation.

© 2011 IEEE

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