发明名称 ACCURATE MAGNETIC COMPASS IN MOBILE ELECTRONIC DEVICE
摘要 Methods and apparatus are described herein for calibration and correction of non-constant sensor errors, and in particular non-constant compass errors, that are based in part on changing software and hardware modes of a host device. The non-constant errors induced in the sensor by each mode and combination of modes is determined in a calibration that may be determined during pre-production testing of one or more host devices. The calibration results can be incorporated into software and/or hardware of the host device. During normal operation, a sensor correction can be applied to sensor measurements based in part on the active mode or combination of modes.
申请公布号 US2011106474(A1) 申请公布日期 2011.05.05
申请号 US20090612529 申请日期 2009.11.04
申请人 QUALCOMM INCORPORATED 发明人 KULIK VICTOR;BRUNNER CHRISTOPHER
分类号 G01C17/38 主分类号 G01C17/38
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