2-DIMENSIONAL MODULATION TRANSFER-FUNCTION OF LUMINANCE ON DISPLAY IMAGES WITH A MOSAIC PIXEL STRUCTURE

The mosaic pixel structure of displays such as LCDs influences human v isual characteristics differently than the raster scans of conventiona l CRTs. Specifically it has two weak points, the sampling patterns are inferior to raster scans, and the resolution is less good because few er pixels are used. Therefore it is very important to further improve the design of the mosaic pixel structure. This paper describes a new f ormula that interprets the relation between the modulation transfer fu nction (MTF) and mosaic pixel structures. The formula for the MTF of m osaic pixel structure displays is derived from two dimensional pixel s tructures as well as the pixel aperture with a weighted intensity of l uminance. Using this formula, the effects of pixel aperture and pitch, and color dot arrangement can be qualitatively estimated and evaluate d.