Multiple message selective telltale display

Details Multiple message selective telltale display Multiple message selective telltale display

1993-10-25

1996-04-23

Bowler, Alyssa H.

Communications: electrical

Continuously variable indicating

With meter reading

34081554, 345 32, G05B 2302, G09G 300

Patent

active

055107761

ABSTRACT:
A plurality of optical projectors focus telltale messages, one at a time, onto a vehicle instrument panel display area. In one embodiment a logic circuit assigns priority to the messages and displays only the message of higher priority when more than one message is prompted. The projection lamps are high intensity LEDs arranged in parallel but having diodes in series with lower priority lamps to hold them off when a higher priority lamp is energized. A constant current source regulates the LED current. In another embodiment two message lamps are controlled by a logic circuit such that when both are prompted for display an oscillator causes the messages to be displayed alternately, but when either message alone is prompted, its lamp will be energized continuously.

REFERENCES:
patent: 2981941 (1961-04-01), Ogle
patent: 3103646 (1963-09-01), Sheaffer, Jr. et al.
patent: 3286585 (1966-11-01), McCullough et al.
patent: 3366950 (1968-01-01), Wilson
patent: 3370272 (1968-02-01), Kenedi
patent: 4179690 (1979-12-01), Nicholls
patent: 4575718 (1986-03-01), Ludowyk
patent: 5194854 (1993-03-01), Havel

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