Input device for using geomagnetic sensor and a method thereof for generating input signal
First Claim
1. An input device generating an input signal when the input device is rotated so that a rotation angle is changed, the input signal corresponding to the rotation angle, the input device comprising:
- a geomagnetic sensor outputting a voltage corresponding to geomagnetism; and
a control part calculating an azimuth using the voltage output from the geomagnetic sensor and calculating the rotation angle by comparing the calculated azimuth to a previously measured azimuth, thereby generating the input signal corresponding to the rotation angle when the input device is tilted within a certain range and ignoring the rotation angle when the device is tilted beyond a certain range.
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Accused Products
Abstract
An input device using a geomagnetic sensor includes a geomagnetic sensor outputting a voltage corresponding to geomagnetism, and a control part calculating an azimuth using the voltage output from the geomagnetic sensor and calculating the rotation angle by comparing the azimuth to a previously measured azimuth, thereby generating the input signal corresponding to the rotation angle when the input device is tilted within a certain range. Accordingly, unwanted generation of the input signal is prevented when the input device is tilted by more than a certain angle.
29 Citations
16 Claims
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1. An input device generating an input signal when the input device is rotated so that a rotation angle is changed, the input signal corresponding to the rotation angle, the input device comprising:
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a geomagnetic sensor outputting a voltage corresponding to geomagnetism; and a control part calculating an azimuth using the voltage output from the geomagnetic sensor and calculating the rotation angle by comparing the calculated azimuth to a previously measured azimuth, thereby generating the input signal corresponding to the rotation angle when the input device is tilted within a certain range and ignoring the rotation angle when the device is tilted beyond a certain range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for generating an input signal in an input device when the input device is rotated so that a rotation angle is changed, the input signal corresponding to the rotation angle, the method comprising:
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(a) outputting a voltage corresponding to geomagnetism; (b) calculating an azimuth based on the voltage and calculating the rotation angle by comparing the azimuth to a previously measured azimuth; and (c) generating the input signal corresponding to the rotation angle when the input device is tilted within a certain range and ignoring the rotation angle when the device is tilted beyond a certain range. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification