| 摘要 |
The invention relates to a method and to a device for controlling a data processing system, a light beam being emitted from a pointing device to a control surface which is equipped with one or more optical position detectors which are connected to the data processing system and said data processing system being influenced in accordance with the impact point of the light beam on the control surface. In order to be able to input different characters using the pointing device independently from where the light beam emitted by the pointing device is currently pointing, the light intensity emitted by the pointing device to the control surface oscillates in a pulse sequence characteristic for individual characters. According to the invention, the optical position detector is a flat luminescence optical wave guide with local photoelectric sensors enabling it to achieve the required high resolution. In an advantageous further embodiment, the identity of a pointing device is coded in the pulse sequence, said pointing device enabling a clear distinction of several input devices. |
