Light pen
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United States of America Patent
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Nov 29, 2011
Grant Date -
Apr 21, 2011
app pub date -
Jan 11, 2008
filing date -
Jan 15, 2007
priority date (Note) -
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Abstract
First and second magnets of a light pen according to the present invention are used for replacing a conventional spring to be a switch structure of the light pen. Whereby, the elastic fatigue problem is not yielded, the switch structure is enabled to be more durable and dependable and can be used as a switch structure for a light pen whose stroke between two electric contact points from a separation state to a contact state is shorter.
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