Detection device and method of controlling detection device
AssigneeSharp Kabushiki Kaisha
InventorsNoboru IWATA, Tatsuhito ARIMURA
Life of this patent
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Abstract
A detection device includes a plurality of detection units formed on a semiconductor circuit, a correction capacitive element that indicates a correction capacitance value for correcting detected capacitance values detected by the detection units, a difference acquisition circuit that acquires a difference value between each of the detected capacitance values and the correction capacitance value, and a conversion circuit that converts the difference value into a digital signal. The correction capacitive element, the difference acquisition circuit, and the conversion circuit are formed on the semiconductor circuit.
Claims13
A detection device comprising:
- a plurality of detection units each formed on a semiconductor circuit and including a detection layer that includes a material whose capacitance value varying when the material comes into contact with a detection target;
- a correction capacitive element indicates a correction capacitance value for correcting detected capacitance values detected by the detection units;
- a difference acquisition circuit that acquires a difference value between each of the detected capacitance values and the correction capacitance value;
- and
- a conversion circuit that converts the difference value into a digital signal, wherein
- the correction capacitive element, the difference acquisition circuit, and the conversion circuit are formed on the semiconductor circuit.
A method of controlling a detection device that detects a detection target based on a change in capacitance, the detection device including:
- a plurality of detection units each formed on a semiconductor circuit and including a detection layer that includes a material whose capacitance value varying when the material comes into contact with a detection target;
- a correction capacitive element that indicates a correction capacitance value for correcting detected capacitance values detected by the detection units;
- a difference acquisition circuit that acquires a difference value between each of the detected capacitance values and the correction capacitance value;
- and
- a conversion circuit that converts the difference value into a digital signal,
- the correction capacitive element, the difference acquisition circuit, and the conversion circuit being formed on the semiconductor circuit,
- the correction capacitive element being a variable capacitive element the correction capacitance value of which is variable,
- the method of controlling the detection device comprising:
- a capacitance value setting step of setting the correction capacitance value in accordance with the difference values obtained by the difference acquisition circuit.
Dependencies are inferred from the claim text.