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New method to separate the different reflection contributions of reflective displays

New method to separate the different reflection contributions of reflective displays,Thibault Bignon,Pierre Boher,Thierry Leroux,Jean Noel Curt

New method to separate the different reflection contributions of reflective displays  
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We present a new method to perform viewing angle measurements on LCD reflective displays. The method is based on the use of commercial Fourier optics viewing angle instruments capable of measuring simultaneously nearly all the incidence and azimuth angles and of controlling very precisely the illumination of the sample. The main advantage compared to other instruments is that a clever illumination procedure with two different conditions allows the separation of the intrinsic reflective contribution of the display and of its parasitic front end reflection contribution. Thus, intrinsic performances of the display can be obtained at any incidence and azimuth angles and realistic observer conditions can be simulated. In the present paper we present the new method and different measurement results. We examine in particular the influence of the illumination wavelength on the reflection properties of the displays.
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