A display screen is capable of having regions having different switching speeds as well as regions that are not switched. One region having a first switching speed may be for colour mode display and the other region having a second switching speed different from the first may be for monochrome mode display. Other regions may be off and n ot switched. In alternative versions, three or more switchedregions may be established on a display screen. For example, a monochrome region may be nested inside a colo ur region, in which the colour region may be nested between off regions.