Low battery indicator for electro-active spectacles
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United States of America Patent
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Issued Date -
May 8, 2008
app pub date -
Oct 23, 2007
filing date -
Oct 23, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A low power indicator for electro-active spectacle lenses is presented in which the low power indicator is a part of a controller for the electro-active spectacle lenses or is operably connected to the controller. The low power indicator may generate a signal when the power of the power source for the electro-active spectacle lenses is low. The signal may be used by the controller, or other circuitry to activate an indication to a user of the lenses that the power is low. Such an indication may be periodically activating and deactivating one of an optical power of the electro-active lenses, a vibration source, a visible light source, or an audible sound source.
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