Light guide apparatus

Details Light guide apparatus Light guide apparatus

1998-11-25

1999-08-10

Husar, Stephen

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362489, 362511, 116288, G01D 1128

Patent

active

059347821

ABSTRACT:
A light guide apparatus for use on a motor vehicle instrument panel is disclosed. In order to bring as much light as possible into a dial pointer 20, the panel has a translucent plate 22, the front face of which forms the dial face. Light is introduced into the translucent plate through a plurality of light pipes 44, and is then directed into a catchment area 30 for pointer illumination by converging facets 35,38 formed in the plate. The facets are arranged with a wide opening which receives light traveling in the plate and with a tapering or converging area in which the light incident in the wide opening is continuously reflected into the pointer illumination catchment area.

REFERENCES:
patent: 4899260 (1990-02-01), Schrammek et al.
patent: 5047761 (1991-09-01), Sell
patent: 5546888 (1996-08-01), Skiver et al.
patent: 5703612 (1997-12-01), Salmon et al.

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