| 摘要 |
<p>The device consists of a grid array composed of individually controllable and optically mutually contrastable grid elements (10). The latter are delimited by six limitation paths (12, 12', 14, 14', 16, 16') linked together at their end points, and are adjacent to one another, either directly or at a short distance, on common limitation paths of the outer edge. By the bundles of connecting lines, which do not intersect one another, between the end points of limitation paths which face one another, a total of three main directions (22, 24, 26) are defined. The first and second main direction (22, 24) intersect therein at an angle of between 70o and 110o, preferably between 75?o and 90o¿. The third main direction (26) is intersected by the first two main directions (22, 24) at an angle of 30?o to 60o¿ in the first and third, or second and fourth quadrant of the co-ordinate system extended by the first two main directions (22, 24). In the case of joint actuation of adjacent grid elements of one main direction, the optical impression is created of a continuous gap-free strip. In this way, with only relatively few grid elements (10) it is possible to produce alphanumeric characters as well as continuous graphic representations, which are very legible even from a certain distance.</p> |
