Patent ID: 7889214

Claim:
Method for reproducing colour images by sequentially reproducing monochromatic images, wherein monochromatic primary colour images are reproduced by projecting respective filtered multispectral light onto an imaging device, wherein the multispectral light is projected onto a colour filter arrangement via optical means that are arranged in the light path, wherein in a sequence of changeable filters of the colour filter arrangement a transition between two neighboured colour filters produces light of a secondary colour, and wherein different brightness values are achieved by the imaging device passing on light to a screen as a number of light pulses of a corresponding duration, wherein, for a first primary colour, which has the smallest share in the colour filter arrangement, the minimum pulse duration is selected to be as short as physically possible with respect to the switching speed of the imaging device, that the minimum pulse durations for the other primary colours are adjusted according to the ratio of the share of the respective colour filter segments in the total colour filter arrangement, that the time during which a secondary colour is reproduced during a transition between two monochromatic primary colour filters is selected to essentially fully extend between the end of the reproduction of the preceding primary colour and the beginning of the reproduction of the subsequent primary colour, that the light projected onto the screen during the transitions between neighbouring colour filters is used for increasing the maximum light output, and that the minimum pulse duration for projecting light during the transition between neighbouring colour filters is selected to be essentially the same as the minimum pulse duration for the first primary colour, whereby the dynamic range of the display is increased.