| 摘要 |
A paving slab has at least one light source 4 located so as to be visible from its upper surface. The source is preferably a light emitting diode 4 and is mounted on a circuit board 5. A light guide 6, in the form of a clear plastic rod, conducts the light to the viewing surface, and preferably extends slightly beyond the surface so that it can be seen from a wider angle. The plastic rod 6 may be filled with a clear sealant 7 to prevent the slab material from invading the cavity during manufacture. The circuit board is held in position by pillars 8 during formation of the slab. The pillars are cut flush with the base of the slab after it has set.. There may be a plurality of light sources embedded within the paving slab arranged in a pattern. Also, there may be two separate supporting circuit boards provided, with a row of lights located at the opposite edges of a slab. |
