Portable electronic device with correctable azimuth angle and its correction method
A calibration method and technology of electronic devices, which are applied to measurement devices, the size/direction of magnetic fields, surveying and navigation, etc., and can solve the problems such as the influence of the numerical accuracy of output azimuth angle.
Active Publication Date: 2009-07-22
HTC CORP
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Problems solved by technology
Also due to the diversification of functions and applications, the above-mentioned portable devices usually have different configurations according to different operation modes and requirements, such as slide-type mobile phones, foldable mobile phones, or both vertical and sideways orientations. Smart phones with sliding functions, etc., when the portable device has different usage patterns, the relative position of its internal circuit components changes, and for the electronic compass that is also inside the body, the synthetic magnetic field around it also changes accordingly. If the previous setting value is used for geomagnetic detection, it will affect the accuracy of the output azimuth value
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[0015] The present invention is used in portable electronic devices combined with navigation functions such as pointing and positioning, such as personal digital assistants (personal digital assistant, PDA), mobile phones, smart phones (smart phones) or global positioning systems (global positioning system, GPS). According to the different usage patterns of the device (for example: slide the slide cover of the slide phone to the side or vertical direction (slide-out configuration); lift the top cover of the clamshell phone or borrow the top cover Open and lay flat by the design of double hinges; the use and positioning of detachable screens in portable electronic devices; slide the slide cover of the slide mobile phone in the side direction to the position, and the slide cover can be lifted relative to the horizontal surface A specific angle range (tilted configuration) causes the internal components to have different synthetic magnetic fields to load the corresponding electron...
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The invention relates to a portable electronic device having correctable azimuths and a correction method thereof. When the portable electronic device is operated in different use modes, one or more sensors therein have relative state parameters. When the portable electronic device is in a first use mode, an electronic compass therein loads a relatively preset first setting value according to a senor state parameter corresponding to the first use mode to carry out geomagnetic detection and output data of azimuths. When the portable electronic device changes from the first use mode into a second one, the electronic compass suspends the geomagnetic detection temporarily and loads a relatively preset second setting value according to a senor state parameter corresponding to the changed second use mode to continue the geomagnetic detection and output data of azimuths. The normal geomagnetic detection is continued through loading different preset setting values to rapidly deal with different statuses of disturbing magnetic field.
Description
technical field [0001] The present invention relates to a portable electronic device and its azimuth correction method, in particular to a portable electronic device with a magnetic sensing component and its azimuth correction method, which can measure the azimuth according to different sensing settings. Measured correction. Background technique [0002] With the rapid development of integrated circuits and electromechanical integration technologies, electronic products for navigation and positioning are becoming more and more diversified. Among them, electronic compass provides considerable Capabilities beyond traditional compass or compass. One type of magnetic compass used in the electronic compass provides the azimuth angle data represented by the angle change between the geomagnetic north direction and the target direction as the main sensing data for direction guidance. Usually, the magnetic induction electronic compass contains two or more magnetometers, generally a...
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IPC IPC(8): G01C17/38G01R33/02
Inventor 陈赞元赖玉鹏
Owner HTC CORP