Pointing device enabling means, input device and portable device incorporating same
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United States of America Patent
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Feb 24, 2009
Grant Date -
Oct 13, 2005
app pub date -
Apr 16, 2003
filing date -
Apr 23, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to means for enabling actuation of a pointing device and more particularly a means for detecting activity of a pointing device, so that the pointing is energized only when it needs to be in operation. The means include an activity sensor for sensing activation of the pointing device, said activity sensor comprising a threshold comparator, wherein the activity sensor is adapted to enable energization of the pointing device when the sensed activation of the pointing device exceeds a threshold. The pointing device is used for moving a pointer or prompt in a display, e.g. in mobile telephone. The present invention also relates to an input device with such a pointing device and a portable device incorporating same. The invention is directed to saving energy in portable devices avoiding accidental activation of the pointing device and automatic switching off to reduce the power consumption.
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