| 摘要 |
Position and orientation of a stylus with respect to a sensing surface of a host electronic device are provided by sensing first and second electromagnetic fields at a sensing surface, the first and second electromagnetic fields varying in strength in response to stylus orientation, and determining the orientation from a difference in sensed field strength between the first and second electromagnetic fields. The first and second electromagnetic fields may be produced by proximal and distal electromagnetic transmitters of the stylus. The orientation may be used, for example, to control the response of a computer drawing application executed on the host electronic device.
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