Multi-color display lighting by led

Details Multi-color display lighting by led Multi-color display lighting by led

1996-01-29

1997-12-09

Cariaso, Alan

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 31, 362 32, 362231, 362293, 40444, 40547, F21V 800

Patent

active

056952694

ABSTRACT:
An LCD display is backlit by a main light pipe with LEDs of a first color along one edge or opposed edges which uniformly flood the display with the first color, and with an LED of a second color coupled by a second light pipe to another edge to introduce light to local areas of the main light pipe. Filters of the second color over the local areas are illuminated by the second color LED. Prismatic sheets between the main light pipe and the LCD aid in the uniform distribution of the first color and improve display brightness by directing light toward the operator's eyebox.

REFERENCES:
patent: 2646637 (1953-02-01), Nierenberg et al.
patent: 3302012 (1967-01-01), Reppisch
patent: 3761704 (1973-09-01), Takeichi et al.
patent: 4924356 (1990-05-01), French et al.
patent: 5043850 (1991-08-01), Dreyer, Jr.
patent: 5375043 (1994-12-01), Tokunaga

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