(57) In order to position the light points concurring to form a high number of high-definition
figures, which can be alternatively activated on a variable-message light board, the
technique is provided of constructing each alternative figure through pre-established
grids on which the knots are to be located which are to correspond to the light points
that form the figure itself, and of employing for all alternative figures grids which
are identical to one another, as well as of performing relative translations of said
grids in order to locate relative positions with no points in common or with a umber
of points in common which, though decreases the total number of points, does nor give
rise, in case of employment of optical fibres, to an increase in the number of total
bundles.
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