| 摘要 |
The present invention relates to a fault detection apparatus for segmented digital displays of a capacitive nature. Current probes (53) interposed between the segment drivers (52) and the segments detect the current pulses required by the on and off segments resulting from the square wave energization applied thereto. Discrepancies between the current pulses and the commanded data provide segment fault status. A serial bus (38) transmits the display data from a Control Unit (30, 36) to the display and transmits the Segment Status Data from the display to the Control Unit. The current pulses are sampled pursuant to a pulse mode or square wave mode of operation. |
