A colour sequential display method, the method comprising, in each frame of a plurality of frames: providing illumination to a display panel, wherein the provided illumination, for each of a first subframe, a second subframe and a third subframe of each frame each occupying a separate respective temporal part of each frame but not necessarily in that order, comprises: (i) substantially only a first illumination colour in the first subframe; (ii) substantially only a second illumination colour in the third subframe; and (iii) both the first illumination colour and the second illumination colour provided simultaneously in the second subframe to provide a third illumination colour, the third illumination colour being an illumination colour provided by mixing of the first and second illumination colours; and the method further comprising, in at least one frame of the plurality of frames: driving at least one pixel of a plurality of pixels to perform only one of: (a) during the first subframe to display a first output colour corresponding to the first illumination colour; or (b) during the third subframe to display a second output colour corresponding to the second illumination colour; or (c) during the second subframe to display a third output colour corresponding to the third illumination colour; and characterised in that the first illumination colour, the second illumination colour, and the third mixed illumination colour are the only illumination colours provided by the illumination source. providing illumination to a display panel, wherein the provided illumination, for each of a first subframe, a second subframe and a third subframe of each frame each occupying a separate respective temporal part of each frame but not necessarily in that order, comprises: (i) substantially only a first illumination colour in the first subframe; (ii) substantially only a second illumination colour in the third subframe; and (iii) both the first illumination colour and the second illumination colour provided simultaneously in the second subframe to provide a third illumination colour, the third illumination colour being an illumination colour provided by mixing of the first and second illumination colours; (i) substantially only a first illumination colour in the first subframe; (ii) substantially only a second illumination colour in the third subframe; and (iii) both the first illumination colour and the second illumination colour provided simultaneously in the second subframe to provide a third illumination colour, the third illumination colour being an illumination colour provided by mixing of the first and second illumination colours; and the method further comprising, in at least one frame of the plurality of frames: driving at least one pixel of a plurality of pixels to perform only one of: (a) during the first subframe to display a first output colour corresponding to the first illumination colour; or (b) during the third subframe to display a second output colour corresponding to the second illumination colour; or (c) during the second subframe to display a third output colour corresponding to the third illumination colour; and characterised in that (a) during the first subframe to display a first output colour corresponding to the first illumination colour; or (b) during the third subframe to display a second output colour corresponding to the second illumination colour; or (c) during the second subframe to display a third output colour corresponding to the third illumination colour; and characterised in that the first illumination colour, the second illumination colour, and the third mixed illumination colour are the only illumination colours provided by the illumination source.