An electrostatic capacitance detection device includes a first electrode, and a second electrode at least a part of which is opposed to the first electrode across a transport path extending in a transport direction in which a detection target having a sheet shape is transported. The first electrode and the second electrode extend in a cross direction intersecting the transport direction and have mutually different shapes. Alternatively, the electrostatic capacitance detection device further includes a first floating electrode disposed on the side of the first electrode opposite to the transport path, and a second floating electrode disposed on the side of the second electrode opposite to the transport path. Alternatively, at least one of the first electrode or the second electrode is provided with a first electric field adjuster or a second electric field adjuster.

An electrostatic capacitance detection device includes a first electrode, and a second electrode at least a part of which is opposed to the first electrode across a transport path extending in a transport direction in which a detection target having a sheet shape is transported. The first electrode and the second electrode extend in a cross direction intersecting the transport direction and have mutually different shapes. Alternatively, the electrostatic capacitance detection device further includes a first floating electrode disposed on the side of the first electrode opposite to the transport path, and a second floating electrode disposed on the side of the second electrode opposite to the transport path. Alternatively, at least one of the first electrode or the second electrode is provided with a first electric field adjuster or a second electric field adjuster.

A sensor device includes a detection electrode opposing an external electrode, and generating a voltage corresponding to a change in capacitance; a capacitive amplifier circuit having a first capacitor and a second capacitor, and configured to detect the voltage generated in the detection electrode, and output a detection signal obtained by amplifying the voltage generated in the detection electrode based on a capacitance ratio between the first capacitor and the second capacitor; a reset switch configured to reset the voltage of the detection electrode to a reference potential; a changeover switch configured to switch the capacitive amplifier circuit between a capacitive amplifier and a voltage follower; a second changeover switch configured to disconnect the first capacitor from the capacitive amplifier circuit; and a second reset switch configured to reset a voltage of the first capacitor to the reference potential.

A sensor device includes a detection electrode opposing an external electrode, and generating a voltage corresponding to a change in capacitance; a capacitive amplifier circuit having a first capacitor and a second capacitor, and configured to detect the voltage generated in the detection electrode, and output a detection signal obtained by amplifying the voltage generated in the detection electrode based on a capacitance ratio between the first capacitor and the second capacitor; a reset switch configured to reset the voltage of the detection electrode to a reference potential; a changeover switch configured to switch the capacitive amplifier circuit between a capacitive amplifier and a voltage follower; a second changeover switch configured to disconnect the first capacitor from the capacitive amplifier circuit; and a second reset switch configured to reset a voltage of the first capacitor to the reference potential.

The present invention relates to a method of encoding information on an information carrier, the method involving providing the information carrier with an electrically conductive pattern on a substrate, wherein the pattern is configured to have different capacitance values at different parts of the electrically conductive pattern when placed on a capacitive touchscreen, wherein information is encoded based on said different capacitance values. Also provided are information carriers, and methods of reading information from such carriers. In preferred embodiments, the pattern comprises multiple pattern elements, and one or more of the pattern elements is a multilayer structure having a lower layer and an upper layer, wherein the conductivity of the upper layer is greater than that of the lower layer.

A capacitance detection device includes a first electrode (1) and a second electrode (2) at least partially facing each other with a conveyance path (5) therebetween, the conveyance path extending along a conveyance direction in which a sheet-like detection object (3) is conveyed, an oscillating circuit to form an electric field (9) between the first electrode (1) and the second electrode (2), a detection circuit to detect a change in capacitance between the first electrode (1) and the second electrode (2), a first board (11) and a second board (12) including at least one of the oscillating circuit or the detection circuit, an insulative first plate (6) arranged between the first electrode (1) and the conveyance path (5), and an insulative second plate (7) arranged between the second electrode (2) and the conveyance path (5).

A capacitance detection device includes a first electrode (1) and a second electrode (2) at least partially facing each other with a conveyance path (5) therebetween, the conveyance path extending along a conveyance direction in which a sheet-like detection object (3) is conveyed, an oscillating circuit to form an electric field (9) between the first electrode (1) and the second electrode (2), a detection circuit to detect a change in capacitance between the first electrode (1) and the second electrode (2), a first board (11) and a second board (12) including at least one of the oscillating circuit or the detection circuit, an insulative first plate (6) arranged between the first electrode (1) and the conveyance path (5), and an insulative second plate (7) arranged between the second electrode (2) and the conveyance path (5).

A device and method for detecting a film thickness are provided. The device includes: a common electrode, a detection electrode, a common electrode voltage generating circuit, and a detection electrode signal processing circuit. A detection channel for a film to be detected is formed between a first common surface and a first detection surface. The common electrode voltage generating circuit is configured to generate a voltage on the common electrode, as to induce an effective signal voltage on the detection electrode. The detection electrode signal processing circuit includes: a reset voltage time sequence control circuit, a time sequence control circuit for transferring the effective signal voltage on the detection electrode and a differential amplifier.

A device and method for detecting a film thickness are provided. The device includes: a common electrode, a detection electrode, a common electrode voltage generating circuit, and a detection electrode signal processing circuit. A detection channel for a film to be detected is formed between a first common surface and a first detection surface. The common electrode voltage generating circuit is configured to generate a voltage on the common electrode, as to induce an effective signal voltage on the detection electrode. The detection electrode signal processing circuit includes: a reset voltage time sequence control circuit, a time sequence control circuit for transferring the effective signal voltage on the detection electrode and a differential amplifier.

The present invention relates to a method of encoding information on an information carrier, the method involving providing the information carrier with an electrically conductive pattern on a substrate, wherein the pattern is configured to have different capacitance values at different parts of the electrically conductive pattern when placed on a capacitive touchscreen, wherein information is encoded based on said different capacitance values. Also provided are information carriers, and methods of reading information from such carriers. In preferred embodiments, the pattern comprises multiple pattern elements, and one or more of the pattern elements is a multilayer structure having a lower layer and an upper layer, wherein the conductivity of the upper layer is greater than that of the lower layer.