Lighting fixtures
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United States of America Patent
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Jun 24, 1997
Grant Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Jun 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Lighting fixtures which feature indicia illuminated more uniformally and with greater brightness than in conventional lighting fixtures. LEDs which operate at a higher frequency/shorter wavelength, such as blue LEDs, emit light which causes the transformation material to reemit, reradiate or emit light at a lower frequency/longer wavelength with increased brightness and uniformity. In a preferred embodiment of the lighting fixtures, blue LEDs cause the transformation material to emit green light for bright and even illumination of indicia such as letters and chevrons in exit signs, and at a wavelength to which the human eye is serendipitously sensitive.
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