| 摘要 |
In an optical grid output and/or grid input device, comprising a two-dimensional grid field (24) having light sources (30) and/or light sensors at the grid points (28), a mask (46) whose position is variable relative to the grid field (24), and a control circuit (60) for selectively switching the light sources on and off and for determining the locations of the light-receiving light sensors in each case as a function of the instantaneous relative position of the mask (46), it is proposed to construct the mask as a perforated mask having hole dimensions (P) which are small with respect to the light-emitting surface dimensions ( DELTA X, DELTA Y) of the individual light sources (30) and/or with respect to the light capture area dimensions of the individual light sensors, the arrangement of the holes (50) and the movement path of the mask (46) being defined in such a manner that the holes (50) scan the individual areas (42). <IMAGE>
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