Method of depicting an image

A mat comprising upstanding pile elements each of which has a first surface and an opposed second surface whereby said first surfaces are the only visible surfaces when the mat is viewed in one direction and the second surfaces are the only visible surfaces when the mat is viewed in the opposite direction, each of said first surfaces having part of a first image applied thereto, such parts together constituting the first image, and each of said second surfaces having part of a second image applied thereto, such parts together constituting the second image.

A method of producing images which comprises providing a mat having a backing and a pile upstanding from the backing and constituted by strands which have discrete opposed surfaces, manipulating the strands so that they lie over in one direction to expose one surface of each strand, applying a first image to said one surfaces of the strands, manipulating the strands so that they lie over in the opposite direction to expose the other surfaces of the strands, applying a second image to said other surfaces, and manipulating the strands back to their position normal to the backing.

A method of producing a mat which carries two images one of which is visible as an accurate image when the mat is viewed in one direction and the other of which is visible as an accurate image when the mat is viewed in the other direction, which method comprises printing images in alternating strips, and inverted with respect to one another, onto a sheet, securing an edge zone of the sheet to a backing layer, folding the sheet adjacent to said edge zone to provide a double thickness rib one external face of which carries part of one image and the other external face of which carries part of the other image, attaching the rib, on the opposite side to said zone, to the backing layer and repeating the attaching and folding sequence to provide a multitude of parallel ribs.

A method of producing two images one of which is visible as the predominant image when viewed in one direction and the other of which is visible as the predominant image when viewed in the opposite direction, the method comprising applying inverted first and second images immediately adjacent one another along the viewing line.

In combination a mat comprising a plurality of light emitting diodes and a computer for controlling the diodes to illuminate those required to produce an image.