Agfa Gevaert Nv

Marcellus H De Meyer

Raymond A Roosen

Marcel J Monbaliu

Wilhelmus Janssens

In a liquid crystal display wherein a liquid crystal material is contained in a gap defined between two surfaces, at least one of the said facing surfaces of the gap is constructed by a multi-color relief layer obtained by the color-development of a single hydrophilic colloid silver halide emulsion layer. The relief layer has different regions of multiple different thicknesses corresponding to the plurality of colors thereof, the thickness of each such relief region being characteristic of the particular color of that region. Each different relief region contains a dye of the corresponding color derived from a color coupling agent by the color development and a diffusion-resistant colorless compound derived from a colorless coupling agent by said color development. The colorless compound is present in each relief region in an amount which is different from that in each other relief region and is characteristic of that region. The different thicknesses of the relief layer are so determined in relation to the wave lengths of the corresponding colors that an improvement in visual contrast between electrically energized and electrically non-energized regions of the display is obtained.

Liquid crystal display

Method for the production of a multicolor filter array wherein individual color pixels are delineated by a light absorbing contour pattern, which method comprises the steps of:

Method for the production of a multicolor filter array

A process for the manufacture of a relief element useful in liquid crystal display panels to control the gap-width of the liquid crystal layer, which process comprises the steps of:

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Edegem, Belgium

Marcellus H De Meyer