Electromagnetic stylus with auto-switching
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United States of America Patent
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Sep 24, 2013
Grant Date -
Nov 17, 2011
app pub date -
Dec 7, 2010
filing date -
May 11, 2010
priority date (Note) -
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Abstract
An electromagnetic stylus includes a body, a core and an induction coil. The body includes a first shell and a second shell telescopically sleeved on the first shell. The core is received in and has a nib end extending out of the first shell. The induction coil is sleeved on one end of the core and is received in the first shell. The first shell is made of material without electromagnetic wave shielding capability. The second shell is made of material with electromagnetic wave shielding capability. The second shell is configured to slide along the first shell between two positions, to shield or not to shield part of the induction coil.
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