| 摘要 |
To be able to process the coordinate information from a light-pen directly in a display system, an electronic light-pen connection is shown which can be subsequently attached to an existing display system as an additional feature. In this arrangement, clock pulses are counted in a dot counter (6) and a line counter (8) until the light- pen (4) is activated and inhibits the counters (6, 8) via an AND gate (5). A subsequent microcomputer (9) evaluates the counters (6, 8) so that a computer (3) in the display system can be driven with corresponding data via an interface (11). <IMAGE> |
