Illumination system for a dial of a timepiece

Details Illumination system for a dial of a timepiece Illumination system for a dial of a timepiece

1998-01-05

2000-01-25

Tso, Laura K.

Illumination

Illuminated scale or dial

Internal light source

368 67, 362 23, 362 26, G09B 1930

Patent

active

060171278

ABSTRACT:
A wristwatch dial illumination system with a light guide beneath a light transmissive dial receiving light from an LED mounted on a PC board below the light guide. A pattern of white reflective dots on the bottom surface,of the light guide selectively ejects internally reflected light toward the dial and an absorption pattern of light absorbing material selectively absorbs ejected light, including the bright spot from the LED.

REFERENCES:
patent: 4026103 (1977-05-01), Ichikawa et al.
patent: 4323951 (1982-04-01), Pasco
patent: 4771368 (1988-09-01), Tsukamoto et al.
patent: 5639158 (1997-06-01), Sato

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