Patent ID: 7898381

Claim:
A sensor sheet comprising: a first sheet having thereon a plurality of electrodes arranged apart from each other in a lengthwise direction and a transverse direction to form a matrix; a second sheet which is laminated on the first sheet, and has thereon a plurality of electrodes arranged apart from each other in the two directions to form a matrix, the electrodes respectively facing the electrodes of the first sheet; and a plurality of pressure-sensitive resistors each arranged between one of the electrodes on the first sheet and one of the electrodes on the second sheet; wherein a first opening, a second opening, and a cut line are formed between each pair of electrodes adjacent to each other in one oblique direction between the lengthwise direction and the transverse direction: the first opening being formed between the pair of electrodes, and near a first electrode of the pair of electrodes; the second opening being formed between the first opening and a second electrode of the pair of electrode, and near the second electrode; and the cut line being formed with a pair of borders extending in the one oblique direction, and connecting the first opening and the second opening, and wherein the first opening is defined by a plurality of borders including a first border and a second border, the first border being connected to a first one of the pair of borders of the cut line and extending in the transverse direction, and the second border being connected to a second one of the pair of borders of the cut line, and extending in the lengthwise direction, and the second opening is defined by a plurality of borders including a third border and a fourth border, the third border being connected to the second one of the pair of borders of the cut line and extending in the transverse direction, and the fourth border being connected to the first one of the pair of borders of the cut line and extending in the lengthwise direction.