Patent ID: 11907482
Assignee: WACOM CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A pen detection system that detects a pen signal transmitted from a pen to detect a position of the pen, the pen detection system comprising:
a sensor pattern in which a column electrode group including first and second partial column electrode groups and a row electrode group including first and second partial row electrode groups are placed on top of each other in a two-dimensional region;
a first integrated circuit,
that is connected to the first partial column electrode group to acquire a first column level distribution indicating a level distribution of the pen signal in the first partial column electrode group; and
that is connected to the first partial row electrode group to acquire a first row level distribution indicating a level distribution of the pen signal in the first partial row electrode group; and

a second integrated circuit,
that is connected to the second partial column electrode group to acquire a second column level distribution indicating a level distribution of the pen signal in the second partial column electrode group; and
that is connected to the second partial row electrode group to acquire a second row level distribution indicating a level distribution of the pen signal in the second partial row electrode group, wherein

the pen detection system,
derives a column direction position of the pen in the two-dimensional region, based on the first and second column level distributions; and
derives a row direction position of the pen in the two-dimensional region, based on the first and second row level distributions,

wherein,
a predetermined number of at least 4 boundary column electrodes positioned near a boundary between the first partial column electrode group and the second partial column electrode group among a plurality of column electrodes included in the column electrode group are connected to both of the first and second integrated circuits, and
one of the first or second integrated circuits sets a terminal connected to the boundary column electrode to high impedance when the other of the first or second integrated circuits detects a level of the pen signal in the boundary column electrode.