HANDHELD POINTING DEVICE, POINTING METHOD THEREOF AND METHOD FOR IMPROVING STATIC DRIFT
First Claim
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1. A handheld pointing device comprising:
- a first piezoelectric vibrating gyro element for determining a rotation of the handheld pointing device in a first direction and producing a first rotation output;
a second piezoelectric vibrating gyro element for determining the rotation of the handheld pointing device in a second direction and producing a second rotation output; and
a processing unit, coupled to the first piezoelectric and second vibrating gyro element, for producing a pointing output via the first and second rotation output, wherein when the handheld pointing device is used, the processing unit updates a static reference voltage of the first piezoelectric vibrating gyro element via the first rotation output.
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Abstract
The invention discloses a handheld pointing device, a pointing method thereof and method for improving static drift. The handheld pointing device includes a first piezoelectric vibrating gyro element, a second piezoelectric vibrating gyro element and a processing unit. The processing unit is coupled to the first and second piezoelectric vibrating gyro element, respectively. The piezoelectric vibrating gyro elements are used to detect the rotation of the handheld pointing device and produce a first rotation output and a second rotation output. The processing unit is used to produce a pointing signal via the first rotation output and the second rotation output.
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18 Claims
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1. A handheld pointing device comprising:
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a first piezoelectric vibrating gyro element for determining a rotation of the handheld pointing device in a first direction and producing a first rotation output; a second piezoelectric vibrating gyro element for determining the rotation of the handheld pointing device in a second direction and producing a second rotation output; and a processing unit, coupled to the first piezoelectric and second vibrating gyro element, for producing a pointing output via the first and second rotation output, wherein when the handheld pointing device is used, the processing unit updates a static reference voltage of the first piezoelectric vibrating gyro element via the first rotation output. - View Dependent Claims (2, 3, 4)
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5. A pointing method of a handheld pointing device, the method comprising the steps:
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determining the rotation of the handheld pointing device in a first direction and a second direction through a piezoelectric vibrating gyro element and producing a first rotation output and a second rotation output; updating a static reference voltage of the piezoelectric vibrating gyro element in the first direction via the first rotation output; and producing a pointing output via the first rotation output and the second rotation output. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method for a handheld pointing device to improve the static drift comprising:
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calculating a present rotation value via a rotation output provided by a piezoelectric vibrating gyro element; determining whether to update a maximum rotation value and a minimum rotation value according to the present rotation value; determining whether the handheld pointing device is in a static state; and if the handheld pointing device is in the static state for more than a preset time, updating the static reference voltage of the piezoelectric vibrating gyro element via the present rotation value. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification