Indicator device and illumination device
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United States of America Patent
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Feb 11, 2003
Grant Date -
N/A
app pub date -
Nov 25, 1998
filing date -
Mar 31, 1997
priority date (Note) -
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Abstract
An indicator device is intended to make an indication by illuminating a predetermined indicating surface, and comprises a light source (12) for emitting a light (L1) of the first wavelength and a fluorescent plate (22) disposed between the light source and the indicating surface for changing at least part of the light of the first wavelength projected from the light source into a light (L2) of the second wavelength longer than the first wavelength and projecting it towards the indicating surface.
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