Invention Grant
US07921572B2 Accuracy indications for an electronic compass in a portable device
有权
便携式设备中的电子罗盘的精度指示
- Patent Title: Accuracy indications for an electronic compass in a portable device
- Patent Title (中): 便携式设备中的电子罗盘的精度指示
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Application No.: US12479196Application Date: 2009-06-05
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Publication No.: US07921572B2Publication Date: 2011-04-12
- Inventor: Robert Mayor , Patrick S. Piemonte , Ronald K. Huang , Parin Patel
- Applicant: Robert Mayor , Patrick S. Piemonte , Ronald K. Huang , Parin Patel
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Main IPC: G01C17/38
- IPC: G01C17/38
Abstract:
Multiple instances of a geomagnetic field are calculated. Multiple instances of an average magnitude of a subset of the instances of the geomagnetic field are also calculated. When the average magnitude changes by more than a first predetermined threshold, the user is informed that compass accuracy has degraded. Other embodiments are also described and claimed.
Public/Granted literature
- US20100307015A1 ACCURACY INDICATIONS FOR AN ELECTRONIC COMPASS IN A PORTABLE DEVICE Public/Granted day:2010-12-09
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