Illuminated laptop keyboard with uniform illumination
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Oct 16, 2012
Grant Date -
Jul 7, 2011
app pub date -
Jan 6, 2010
filing date -
Jan 6, 2010
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A laptop keyboard in one embodiment includes a rectangular key printing film formed of an optically transmissive material and comprising keys; a rectangular luminescent sheet formed of optically transmissive silicone rubber, the luminescent sheet being mounted below the key printing film; an LED light source disposed to a side of the luminescent sheet; and a capacitive layer mounted below the luminescent sheet and comprising an insulative layer and pairs of upper and lower conductors wherein a pressing of the key changes capacitance of the pair of upper and lower conductors for typing or performing a predetermined command. Light emitted by the LED light source is directed to the luminescent sheet which in turn directs the light upward toward the key printing film.
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