| 摘要 |
The invention relates to a control device serving as a substitute for a key pad with function keys for operating, for example, a mobile telephone or a button-type electric lock. The function keys intended for keying in the numerals zero to nine and/or a number of letters are arranged in a group (4) forming a pattern across a surface. Each key differs in its shape and orientation from adjacent keys to such a degree that it is possible with a finger, preferably the thumb of one hand, to orientate oneself among the group (4) and to determine which key one is touching with the finger, without looking at the key. |
