Lightpipe and lightpipe array for redirecting light from a surfa

Details Lightpipe and lightpipe array for redirecting light from a surfa Lightpipe and lightpipe array for redirecting light from a surfa

1993-05-28

1994-07-05

Yeung, James C.

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 31, 362 32, 362800, G01D 1128

Patent

active

053273281

ABSTRACT:
A lightpipe or lightpipe array is utilized for redirecting light from a surface mounted LED. The lightpipe includes a first surface portion which is aligned with a surface mounted LED on a circuit board when the lightpipe is mounted on the circuit board, a first passageway comprising a plurality of first reflecting surfaces for redirecting light received at the first surface portion in a first direction, a second passageway extending from the first passageway comprising a plurality of second reflecting surfaces for redirecting the light received from the first passageway in a second direction which is different from the first direction, and a light radiating surface portion through which the light received from the second passageway exits so as to provide a visual indicator. Utilization of a plurality of lightpipes in a lightpipe array permits the array in the form of a single molded part to collect light from multiple LEDs and to redirect light to different locations without a perceptible mixture of light between adjacent LEDs.

REFERENCES:
patent: 4163883 (1979-08-01), Boulanger
patent: 4321655 (1982-03-01), Bouvrande
patent: 4800466 (1989-01-01), Bauer et al.
patent: 4935856 (1990-06-01), Dragoon
patent: 5063479 (1991-11-01), Satoh
patent: 5130761 (1992-07-01), Tanaka

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