Patent ID: 8917431

Claim:
Holographic colour display device comprising, in an optical path: light source means, focussing optical means, a controllable light modulator, and an optical image separation means with vertical separating elements, where the focussing optical means image sufficiently coherent light through controllable pixels of the controllable light modulator into an observer plane, said controllable pixels are arranged in the form of a matrix, and where the light is superposed to form visibility regions for observer eyes, and where the vertical separating elements of the optical image separation means image pixel columns in which holograms are encoded into respective visibility regions for each observer eye, wherein The image separation means is assigned with an external colour filter whose material comprises parallel vertical colour stripes of primary colours which are periodically repeated in a horizontal direction in the colour filter, The light modulator comprises a sequence of two inscribed holograms for each primary colour which are interleaved for a left and a right observer eye in six pixel columns, where the sequence of the holograms is periodically repeated in a horizontal direction in the light modulator, and periods of the colour filters and of the holograms have an identical size and are arranged in relation to each other such that each separating element is assigned with one colour stripe of the colour filter and at least two pixel columns with holograms of the primary colour of that colour stripe, in order to generate multi-coloured visibility regions.