Display system

Details Display system Display system

1992-11-23

1994-03-15

Husar, Stephen F.

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 30, 362244, 362339, 362812, 40546, 34081541, 34081542, G01D 1128

Patent

active

052950506

ABSTRACT:
An improved display system includes a prism having a pair of light receiving faces which intersect at an apex. The prism has a light emitting face from which light transmitted. The light emitting face of the prism has a series of parallel linear V-shaped grooves with side surfaces which intersect to form a series of parallel linear ridges which disperse rays of light. A display panel is disposed adjacent to the prism and has a rear side with indicia thereon. The indicia can be read from a front side of the display panel, even in bright sunlight, when a pair of light sources are energized. However, when the light sources are not energized, the indicia on the display panel cannot be observed. A divider panel separates the light sources to enable an observer to determine when one of the light sources is burned out. Reflectors direct light from the light sources toward the light receiving faces of the prism.

REFERENCES:
patent: 1635863 (1927-07-01), Schulz et al.
patent: 2576849 (1951-11-01), Moore
patent: 2907249 (1959-10-01), Hjermstad
patent: 4141058 (1979-02-01), Mizohata et al.
patent: 4794492 (1988-12-01), Vinther
patent: 5039832 (1991-08-01), Polacek et al.
4-Lamp Pushbutton Switches-Series 10E & 10H Twist-Lite, published by MSC Products Eaton Croporation, no publication data.

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