Low power, low cost illuminated keyboards and keypads
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United States of America Patent
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-
Aug 10, 2004
Grant Date -
May 31, 2001
app pub date -
Jan 4, 2001
filing date -
Aug 26, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Methods are provided for adapting existing manufacturing processes for non-illuminated data-entry devices and mouses to the manufacture of illuminated data-entry devices. Luminescent sheets of one or more colors underlying optically transmissive device components provide illumination of the components visual to a user of the device. The optically transmissive components may be doped with phosphors or tinted to provide components that emit light of different colors. The intensity of illumination of the luminescent sheet may be controlled by the user and may vary in response to the background light of the environment.
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