Keyboard apparatus the operation side of which can be illuminated
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 4, 2001
Grant Date -
N/A
app pub date -
Jan 18, 2000
filing date -
Jan 19, 1999
priority date (Note) -
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Abstract
The keyboard apparatus includes a plurality of key switches manipulated by keytops and a backlight means comprising an EL sheet for illuminating the operation side S constituted of the keytops from under it wherein the key switches are provided with permeable keytops and impermeable character portions and the backlight means has light emission positions allocated corresponding to key placements.
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