Visual display with time multiplexing

A display device comprising:

• a display, operable to generate a real image;
• and
• an optical system, comprising a plurality of optical channels, each of the optical channels comprising one or more lenslets, arranged to generate one or more sub-images from one or more respective partial real images on the display associated with that channel, by each lenslet projecting light from the display to an eye position;
• wherein the sub-images combine to form a virtual image viewable from the eye position so that different optical channels image a same portion of the display to different portions of the virtual image;
• comprising a light switching system allowing a flow of light through selected ones of the channels from the display to the pupil range and preventing a flow of light through other selected ones of the channels from the display to the pupil range;
• and
• wherein the light switching system is arranged to successively open the optical channels to allow light to flow successively through the optical channels and, while each of the optical channels is open, the display is arranged to display the one or more respective partial real images associated with that channel.