Image input/output device for displaying an image on a single panel

An image input/output device comprising a silicon light device panel comprising a plurality of silicon light devices arranged on one of an n-type silicon based substrate and a p-type silicon based substrate in at least two dimensional arrays for at least one of inputting and outputting an image,

• wherein each of the plurality of silicon light device includes a doped region on one surface of the substrate, so that at least one of the plurality of silicon light devices is operable as a light-emitting device and as a light-receiving device, the doped region being doped to a depth with a predetermined dopant of the opposite type to the substrate such that a photoelectrical conversion effect by quantum confinement in a p-n junction between the doped region and the substrate occurs, and
• wherein an electrode is patterned into said one of an n-type silicon based substrate and a p-type silicon based substrate, to enable at least one of inputting and outputting of the image into and from the silicon light device panel on a pixel-by-pixel basis.