Optical input for computer systems - has multiple optical transmitters and receivers operated in time shared mode

摘要

The optical input system has a number of optical transmitter (1) and receivers (2) that are screened relative to the user (8) by a light transmitting medium. In order to handle a large number of inputs the multiple optical paths are operated in a time shared mode. The input transmitters are enabled using a time shared control stage (4) and the received signals are handled by a similar unit (3). The timing is provided by a generator circuit (5) with a coupled timebase unit (6). ADVANTAGE - Uses time shared signal transmission for energy saving.