Long-Afterglow Electroluminescent Lamp
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United States of America Patent
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Issued Date -
May 3, 2007
app pub date -
Nov 3, 2005
filing date -
Nov 3, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A long-afterglow phosphor is added to an electroluminescent lamp in order to continue to provide illumination after the electrical power has been removed from the lamp. When the electroluminescent lamp is powered, it emits light caused the stimulation of an electroluminescent phosphor in the electric field. The emitted light further stimulates a long-afterglow phosphor so that when the lamp is turned off, and the electroluminescent phosphor ceases to emit light, the afterglow phosphor continues to provide a visible illumination at a lower intensity for many additional minutes or hours.
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