Mechanical keypad with touch pad function
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United States of America Patent
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Jun 26, 2012
Grant Date -
Dec 9, 2010
app pub date -
Oct 11, 2009
filing date -
Jun 4, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A mechanical keypad with touch panel function includes a key set including a plurality of keycaps and a keytop covering the keycaps, a backlight layer under the key set, a capacitive touch unit selectively disposed under several keycaps, an elastic layer including an elastomer and a plunger corresponding to the keycaps and disposed under the capacitive touch unit as well as a circuit board including metal domes and dome sheets corresponding to the keycaps. Each metal dome provides a mechanical feedback force so that the keycaps are able to be in indirect contact with the metal domes and the dome sheets by means of the plunger.
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