Patent ID: 6017127
Filing Date: 2000-01-25
Classification: G01D,G04B

Abstract:
An illumination system for a watch dial comprising:a light guide comprising a light conducting member having a periphery and upper and lower surfaces, and adapted to conduct light throughout by internal reflection between said upper and lower surfaces,a dial to be illuminated disposed above the light guide, said dial comprising a light transmissive member having a periphery substantially coextensive with that of the light guide and having a lower dial surface adjacent the light guide upper surface,at least one concentrated light source disposed below and spaced from the lower surface of said light guide,a light coupling channel extending from the light source to the lower surface of the light guide,an ejection pattern on at least the lower surface of the light guide adapted to selectively eject internally reflected light from the lower surface of the light guide through its upper surface toward the dial, andan absorption pattern on at least the lower dial surface adapted to selectively absorb light from the light source.