Speedometer display having fiber optic illumination system

Details Speedometer display having fiber optic illumination system Speedometer display having fiber optic illumination system

1988-05-06

1990-06-19

Lazarus, Ira S.

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 32, F21V 800

Patent

active

049358502

ABSTRACT:
A speedometer display is disclosed having a front, opaque indicator dial upon which are provided numeric and scale mark indication which are constructed of transparent, parallel fiber optic bundles extending transversely through the opaque display. Parallel to and behind the display, a light interrupter plate having a reflective surface adjacent the fiber optic bundles is rotationally attached to the speedometer needle shaft for rotation. Immediately behind and parallel to this interrupter plate is a color filter segment plate having a plurality of color filters which are back illuminated by artificial illumination means. The speedometer marks and numbers corresponding to speeds to the right of a given speedometer needle position are illuminated by reflected ambient light transmitted through the fiber optic bundles and reflected from the interrupter plate. Those marks and numbers to the left of the speedometer needle are illuminated by transmitted back light which passes through the filter segments and illuminates the back portion of the numeric and mark fiber optic bundles as they are uncovered by rotation of the interrupter plate. The provision of a plurality of filter elements allows progressive color coding of each segment to indicate varying degrees of operator caution as the rate shown increases.

REFERENCES:
patent: 2060427 (1936-11-01), Robinson
patent: 2108342 (1938-02-01), Le Fevre
patent: 2165498 (1939-07-01), Moody
patent: 2286737 (1942-06-01), Hilt
patent: 3857361 (1974-12-01), Gibson et al.

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