Scanning method for sensor coils in coordinate data input device
DCFirst Claim
1. In a coordinate data input system which includes a sensor plate containing a plurality of sensor coils arranged parallel to the detecting direction and a pointing device, and detects the coordinate data on the pointing device by an interaction between each one of the sensor coils and the pointing device, a scanning method for succeedingly selecting one from the sensor coils to detect the signal generated by the interaction comprising;
- an interval scanning operation for scanning, skipping the predetermined number of sensor coils, the limited sensor coils located at the predetermined interval space of the whole sensor coils.
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Abstract
A primary object is to provide a scanning method resulting in high speed and correct operation in a coordinate data detecting process. The scanning method for succeedingly selecting sensor coils arranged on a sensor plate in a coordinate data input device comprises an interval scanning operation in which a limited number of the whole sensor coils are selected at a predetermined interval space to detect coordinate data of a pointing device. In one preferable mode, the above described interval scanning operation is repeated until a signal representing the existence of the pointing device is detected, and this interval scanning operation is performed on the respective sensor coil arrays. Each interval space includes one to three sensor coils.
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Citations
17 Claims
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1. In a coordinate data input system which includes a sensor plate containing a plurality of sensor coils arranged parallel to the detecting direction and a pointing device, and detects the coordinate data on the pointing device by an interaction between each one of the sensor coils and the pointing device, a scanning method for succeedingly selecting one from the sensor coils to detect the signal generated by the interaction comprising;
an interval scanning operation for scanning, skipping the predetermined number of sensor coils, the limited sensor coils located at the predetermined interval space of the whole sensor coils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
Specification