Multipoint sensor
AssigneeStantum
InventorsPascal Joguet, Julien Olivier
Life of this patent
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Abstract
The invention relates to a multipoint sensor (1), including: an upper layer (3) made of conducting tracks arranged in lines; a lower layer (6) made of conducting tracks arranged in columns; spacers (4) provided between the upper layer and the lower layer so as to insulate the upper layer (3) and the lower layer (6), characterised in that the sensor further includes at least one resistive intermediate layer (5) provided between the spacers and at least one layer from among the upper conducting layer and the lower conducting layer.
Claims14
A multipoint sensor (1) comprising:
- an upper layer (3) constituted by conductive tracks organized in rows;
- a lower layer (6) constituted by conductive tracks organized in columns;
- spacers (4) positioned between the upper layer and the lower layer so as to insulate the upper layer (3) and the lower layer;
- the sensor further comprises at least one resistive intermediate layer (5) positioned between the spacers and at least one of the conductive upper layer and the conductive lower layer;
- characterized in that the lower layer (6) has a linear resistance, and the upper layer (3) has a linear resistance, and the intermediate layer (5) has a vertical resistance and the vertical resistance of the intermediate layer (5) is greater than the linear resistance of the lower layer (6) and the linear resistance of the upper layer (3).
A multipoint sensor according to one of the preceding claims in which the vertical resistance of the intermediate layer (5) is a hundred times greater than the vertical resistance of the lower layer and of the upper layer.
A multipoint sensor according to one of the preceding claims in which The rows of the conductive upper layer (3) and the columns of the conductive lower layer (6) form a matrix of square cells.
A multipoint sensor according to the preceding claim in which the square cells have sides of 1.5 millimeters.
A multipoint sensor according to one of the preceding claims in which the vertical resistance of the intermediate layer (5) has a value ranging from 50 kiloOhms to 200 kiloOhms.
A multipoint sensor according to one of the preceding claims in which the intermediate layer (5) is of silicone.
A multipoint sensor according to one of the preceding claims in which the upper layer is constituted by rows of indium tin oxide ITO.
A multipoint sensor according to one of the preceding claims in which the lower layer is constituted by columns of indium tin oxide ITO.
A multipoint sensor according to one of the preceding claims in which the conductive upper layer is situated under a layer (2) of polyethylene terephthalate PET.
A multipoint sensor according to one of the preceding claims in which the conductive lower layer is situated above a layer of glass (7).
A multipoint sensor according to one of the preceding claims in which the intermediate layer is transparent.
A multipoint sensor according to one of the preceding claims in which the intermediate layer has a much higher impedance than the impedance of the conductive material of the upper and lower layers.
Dependencies are inferred from the claim text.