| CPC G06F 3/04166 (2019.05) [G06F 3/03545 (2013.01); G06F 3/046 (2013.01)] | 10 Claims |
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1. A position detecting device comprising:
a sensor including a plurality of first electrodes arranged in a first direction, a plurality of second electrodes arranged in a second direction intersecting the first direction, and an input surface having a predetermined area, wherein the input surface, in operation, receives a position indication signal from an indicator, wherein the indicator, in operation, detects pen pressure information, includes the pen pressure information in the position indication signal, and transmits the position indication signal;
a position detecting circuit which, in operation, detects an indicated position corresponding to an indication input performed by the indicator on the input surface, as absolute coordinates with a predetermined position on the input surface as an origin, based on output signals from the plurality of first electrodes and the plurality of second electrodes;
a relative coordinate calculating circuit which, in operation, sequentially obtains the absolute coordinates from the position detecting circuit and calculates relative coordinates as a difference between previous absolute coordinates and present absolute coordinates;
an output absolute coordinate value calculating circuit which, in operation, assumes that the indication input is performed on an input area corresponding to the input surface, the input area being an area positioned on a predetermined output absolute coordinate region corresponding to a display screen of a display device, and calculates an output absolute coordinate value of the indicated position corresponding to the indication input by using the relative coordinates from the relative coordinate calculating circuit;
an output circuit which, in operation, outputs the output absolute coordinate value calculated by the output absolute coordinate value calculating circuit;
a pen pressure detecting circuit which, in operation, detects the pen pressure information from the indicator based on the output signals from the plurality of first electrodes and the plurality of second electrodes; and
an input area movement processing circuit which, in operation, changes an output absolute coordinate value indicating a position on the output absolute coordinate region, an origin of the input area being associated with the position, according to the relative coordinates from the relative coordinate calculating circuit in response to a determination that a predetermined input operation is performed based the absolute coordinates from the position detecting circuit and the pen pressure information from the pen pressure detecting circuit,
wherein the indicator is not detected by the position detecting circuit while the predetermined input operation is performed.
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