US Patent 9534777 Carpet unit arrangement having a light source

The invention provides a carpet unit arrangement comprising a carpet unit and a light source. The carpet unit comprises a carpet or a carpet tile, wherein the carpet unit comprises a user face, formed by carpet tuft yarns, and an opposite back face. Seen in a direction from the user face to the back face, the light source is arranged behind the user face of the carpet unit. The light source is further arranged to provide light downstream of the user face of the carpet unit. The carpet unit is an axminster-based carpet unit, comprising wefts, warps and said tuft yarns.