Abstract: To provide an infrared sensor that allows heat to be efficiently transferred from an insulating film to a heat sensitive element and has a good responsivity. The infrared sensor according to the present invention includes an insulating film 2; a pair of first adhesive electrodes 3A that is patterned on either surface of the insulating film; a pair of first terminal electrodes 4A that is patterned on either surface of the insulating film; a first heat sensitive element 5A that is provided on either surface of the insulating film and is connected to the pair of first adhesive electrodes; a pair of first pattern wiring parts 6A that is patterned on either surface of the insulating film with one end thereof being connected to the pair of first adhesive electrodes and the other end thereof being connected to the pair of first terminal electrodes; and a heat transfer film 7.

Abstract: To provide an infrared sensor that allows heat to be efficiently transferred from an insulating film to a heat sensitive element and has a good responsivity. The infrared sensor according to the present invention includes an insulating film 2; a pair of first adhesive electrodes 3A that is patterned on either surface of the insulating film; a pair of first terminal electrodes 4A that is patterned on either surface of the insulating film; a first heat sensitive element 5A that is provided on either surface of the insulating film and is connected to the pair of first adhesive electrodes; a pair of first pattern wiring parts 6A that is patterned on either surface of the insulating film with one end thereof being connected to the pair of first adhesive electrodes and the other end thereof being connected to the pair of first terminal electrodes; and a heat transfer film 7.

Abstract: The infrared sensor according to the present invention includes an insulating film; a pair of first terminal electrodes; a pair of second terminal electrodes; a first heat sensitive element; a second heat sensitive element; a pair of first pattern wiring parts and a pair of second pattern wiring parts that are patterned on either surface of the insulating film; an infrared-receiving region that is provided on the other surface of the insulating film so as to oppose to the first heat sensitive element; and an infrared reflection film that is formed on the other surface of the insulating film so as to avoid the infrared-receiving region and to cover at least the portion immediately above the second heat sensitive element, wherein the infrared reflection film has a thermal coupling part in proximity to a portion of the first pattern wiring part.

Abstract: The infrared sensor mounting member of the present invention is able to mount an infrared sensor body, which includes an insulating substrate on which heat sensitive elements and and a plurality of the terminal electrodes are formed, on a mounting substrate by fixing it at the upper portion thereof and includes: an insulating mounting member main body and a plurality of conductive terminal members that are attached to the mounting member main body with the upper end thereof being connected to the terminal electrodes while the lower end thereof being connected to the mounting substrate when the infrared sensor mounting member is mounted thereon. The terminal members are made of a material having a higher thermal conductivity than that of the mounting member main body and have terminal pin portions 7a that are laterally projected.

Abstract: To provide an infrared sensor apparatus that has a small profile and has a small heat capacity of the light guiding path member, and therefore can measure a temperature with high accuracy. The present infrared sensor apparatus includes: an infrared sensor body and a light guiding path member that is provided so as to surround at least the infrared receiving surface of the infrared sensor body and that has an opening immediately above the infrared receiving surface, wherein the light guiding path member is made of a plate material and at least one of the surfaces surrounding the infrared receiving surface is an infrared reflecting surface that is composed of an inclined plate part with the surface thereof on the infrared receiving surface side being inclined towards the opening side.

Abstract: To provide a temperature detection circuit that can detect the high-temperature anomaly of a fuser roller or the like with high accuracy over a wider range of temperature. The temperature detection circuit includes a differential output detection circuit portion C1 having a detection thermistor and a compensation thermistor configured to amplify a difference between an output of the detection thermistor and an output of the compensation thermistor and to detect it as a first differential output; a second differential amplifier portion C2 configured to amplify a difference between the first differential output and the output of the compensation thermistor and to output it as a second differential output; and an AD converter portion C3 configured to convert the output of the compensation thermistor and the second differential output into digital values.

Abstract: The infrared sensor according to the present invention includes an insulating film; a pair of first terminal electrodes; a pair of second terminal electrodes; a first heat sensitive element; a second heat sensitive element; a pair of first pattern wiring parts and a pair of second pattern wiring parts that are patterned on either surface of the insulating film; an infrared-receiving region that is provided on the other surface of the insulating film so as to oppose to the first heat sensitive element; and an infrared reflection film that is formed on the other surface of the insulating film so as to avoid the infrared-receiving region and to cover at least the portion immediately above the second heat sensitive element, wherein the infrared reflection film has a thermal coupling part in proximity to a portion of the first pattern wiring part.

Abstract: An abnormal temperature detection circuit according to the present invention includes: a differential output detection circuit portion C1 having a detection thermistor and a compensation thermistor configured to detect a differential output between an output of the detection thermistor and an output of the compensation thermistor; a threshold setting circuit portion C2 that is an analog circuit configured to change a determination threshold for determining whether a temperature detected by the detection thermistor is an abnormal temperature in accordance with the output of the compensation thermistor and to output the changed determination threshold; and an abnormal temperature determination circuit portion C3 configured to output an abnormal temperature detection signal when the differential output is lower than the determination threshold that has been output.