| 摘要 |
The invention relates to a device for inputting relative co-ordinates which is comprised of: at least one light source (10) for illuminating and/or for transilluminating the front area of an input means; at least one sensor unit (40), which has, on its side assigned to the front area of the input means, at least one scanning unit for recording optical images of the front area of the input means, whereby the scanning unit (402) is placed in at least one cross-over area (240) that is to be covered by the front area of the input means, and; of at least one processing unit for determining the relative position of the front area of the input means. |
