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AssigneeThomson Licensing
InventorsJulien Thollot, Arno Schubert
Estimating the term…
The invention relates to a sequential illumination system for a visual display unit comprising a light source emitting a polychromatic light beam towards said visual display unit within a wavelength range comprising at least three primary colours, and a colour wheel provided with at least three transmissive or reflective segments for transmitting said light beam along an optical path in such a way they successively cut the direction of propagation of said beam. The colour segments are distributed on the said wheel in such an order that the differences of energies perceived by the visual organ of a standard observer (visual stimuli), are as equivalent as possible during the intersegment transitions, when the segments pass along the optical path of the beam. Said invention can be used for movie projection and overhead projection devices.
Imager sequential illumination system comprising:
Method of design of a colour wheel for an imager colour sequential illumination system, the said wheel comprising at least three transmissive and/or reflective segments, the said segments being of different or identical colours and each having a hue, a saturation, a transmissivity or a reflectivity, and a size that are suitable for obtaining a beam exhibiting a reference hue when they scroll sequentially through a zone of transmission of an illumination beam, wherein it comprises a step of measuring the excitation energies induced by the various segments in the visual system of an observer and a step of distributing the coloured segments over the said colour wheel in an order such that the differences of successive excitation energies of the visual system of a standard observer (visual stimuli), during the intersegment transitions, when the segments scroll through the said transmission zone are the least variable possible.
Device of coloured segments comprising a plurality of juxtaposed zones of different colours making it possible to provide, by illumination of the various zones, beams of different colours, wherein the said zones of different colours are arranged in an order such that when they are successively illuminated according to the said order, the differences of energies perceived by the visual system of a standard observer (visual stimuli), during the interzone transitions, when the illumination passes from one zone to the next zone, are the least variable possible.
Dependencies are inferred from the claim text.