Error detection for multi-segmented indicia display

Details Error detection for multi-segmented indicia display Error detection for multi-segmented indicia display

1980-02-04

1981-11-17

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340701, 340791, 340756, G09G 304

Patent

active

043014500

ABSTRACT:
An error detecting unambiguous multi-segmented indicia display method and apparatus is disclosed wherein an "OFF" segment is illuminated differently than an "ON" segment of the display to verify that the "OFF" segment is indeed "OFF" and not a malfunctioning "ON" segment. In the preferred embodiment a pulsating voltage is supplied to the "OFF" segments to provide a lower integrated average voltage and therefore a lower brilliance of display. In an alternate embodiment a contiguous "OFF" segment of one color is provided next to each "ON" segment so as to indicate unambiguously that each non-illuminated "ON" segment is in fact indicating "OFF".

REFERENCES:
patent: 3585629 (1971-06-01), Baynard, Jr.
patent: 3609751 (1971-09-01), Siegel
patent: 3719937 (1973-03-01), Doyle
patent: 3753226 (1973-08-01), Schnurmann et al.
patent: 3813664 (1974-05-01), Geyer et al.
patent: 3866171 (1975-02-01), Loshbough

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