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Electronic equipment

A technology of electronic equipment and main body, which is applied to branch equipment, equipment with sensors, circuits, etc., and can solve problems such as wrong detection of azimuth angle.

Inactive Publication Date: 2003-06-04
YAMAHA CORP
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  • Abstract
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  • Application Information

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Problems solved by technology

Since the output of the Y-axis magnetic sensor changes not only with the azimuth angle but also with fluctuations of other factors (that is, the inclination angle of the geomagnetic field and the inclination angle of the longitudinal axis), so, assuming that the inclination angle is constant, the electronic equipment is configured as When recognizing the output of the X-axis magnetic sensor and the output of the Y-axis magnetic sensor as the detection value of the local geomagnetic field and determining the vertical-axis azimuth angle only from the detection value, the azimuth angle may be erroneously detected

Method used

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Embodiment Construction

[0070] Embodiments of the present invention are described with reference to the drawings.

[0071] First, a first embodiment of an electronic device according to the present invention is described. As shown in the schematic front view of FIG. 1, a cellular phone 10 as an electronic device has a main body 11 in the shape of a general rectangular parallelepiped whose sides extend respectively along X-axis, Y-axis and Z-axis perpendicular to each other. . In this example, when the main body 11 is in use, the X axis coincides with the horizontal axis or the first axis of the main body 11 , and the Y axis coincides with the longitudinal axis or the second axis of the main body 11 . Also, in this example, the Y axis is used as the third axis of the main body 11, while the horizontal plane is used as a reference plane; the azimuth α is defined as the azimuth angle along the positive direction of the Y axis; the inclination angle β is defined as the Y axis (on the positive side ) an...

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Abstract

A cellular phone includes an X-axis magnetic sensor for outputting a first value corresponding to a component of an external magnetic field along the direction of a transverse axis of the main body, and a Y-axis magnetic sensor for outputting a second value corresponding to a component of the external magnetic field along the direction of a longitudinal axis of the main body. The cellular phone includes a ROM which stores a conversion table defining the relation between the first and second values and values of azimuth and inclination angle of the longitudinal axis of the main body. The cellular phone determines the azimuth and inclination angle on the basis of the first and second values actually output from the X-axis and Y-axis magnetic sensors and with reference to the conversion table.

Description

technical field [0001] The present invention relates to an electronic device comprising in its main body: a first axis magnetic sensor for outputting a value corresponding to an external magnetic field component along a first axis direction; and a second axis magnetic sensor for outputting a value corresponding to According to the value of the external magnetic field component in the direction of the second axis, the second axis intersects the first axis at a predetermined angle, and the second axis can detect the azimuth of the third axis and / or the third axis of the main body according to the values ​​output by these magnetic sensors. The tilt angle of the three axes. Background technique [0002] Recently, it has been considered to include a magnetic sensor in an electronic device such as a cellular phone in order to detect the direction of a local geomagnetic field with the magnetic sensor, thereby providing an azimuth detection function to the electronic device. In thi...

Claims

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Application Information

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IPC IPC(8): G01C17/28H04M1/72403
CPCH04M2250/12H04M1/72522A63F13/00A63F2300/406G01C17/28A63F2300/204A63F2300/6045A63F2300/105A63F2300/205H04M1/72403G01C9/06G01C17/32A63F13/57
Inventor 加藤博万佐藤秀树后藤道彦村松利彦
Owner YAMAHA CORP
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