Abstract:
A sensor device includes a plurality of row lines WL, a plurality of column lines DL, a plurality of reset lines RL, a plurality of pixel circuits that connect to each one of the plurality of row lines, the plurality of column lines and the plurality of reset lines, and an amplifier circuit. The plurality of pixel circuits respectively includes a pyroelectric element, a reset switch that is driven by the plurality of reset lines and discharges an electric charge of the pyroelectric element, and a pixel selection switch that is driven by the plurality of row lines and outputs a signal, which is based on a change of the electric charge of the pyroelectric element by a discharge, to one of the column lines. The signal based on the change of the electric charge of the pyroelectric element by the discharge is amplified in the amplifier circuit.
Abstract:
A detection circuit for a heat sensor includes a charge circuit provided between a second power supply node and a detection node of a heat sensing element, and a discharge circuit provided between the detection node and a first power supply node. The discharge circuit has a discharge resistance element and a discharge transistor provided in series between the detection node and the first power supply node.
Abstract:
An apparatus for detecting position or temperature distribution of an object has a lens which is rotated around a pyroelectric type infrared sensor to collect incident infrared ray on the sensor while scanning the incident infrared ray in a rotational direction. The optical scanning is operated also in the longitudinal direction by providing with a plurality of lenses having different view in the longitudinal direction, the lenses being rotated sequentialy around the sensor. Further, detection of temperature of an object is conducted without using optical chopper by alternately observing the object and a standard temperature material which is arranged in a part of view, or by providing a stationary slit unit on a curved surface formed around a center axis which is the same as the rotation axis of the lens and a movable slit unit having the same pitch and arranged adjacent to the stationary slit unit and rotating together with the lens to intermitting the incident infrared ray.
Abstract:
A thermal imaging device includes an array of pyroelectric detector elements, supported by an array of pillars, the pillars also being effective to enable the passage of electrical signals between the detector elements and an electrical signal processing means. Each pillar is separated from a respective detector electrode by an elongate electrically conductive strip. The device includes areas of infra-red absorbant material effective to conduct heat from non-electroded parts of the device into adjacent pyroelectric detector elements.
Abstract:
A system including a pyroelectric sensor further including an enclosure, a positive pyroelectric sensing element located within the enclosure, a negative pyroelectric sensing element located adjacent the positive pyroelectric sensing element within the enclosure and a window disposed in the enclosure having an elongated shape with a width of the window parallel to a line joining the respective centers of the sensing elements and the length perpendicular to the line wherein the window is centered over the sensing elements to conduct infrared energy from an external source onto the sensing elements and wherein the width of the window is less than the combined widths of the sensing elements plus any space separating the sensing elements.
Abstract:
A version of the invention comprises a device for controlling or interfacing with a computer or other form of communicable machine based on the pyroelectric effect, and includes at least one optically- and infrared- (IR-) transparent graphene electrode.
Abstract:
An infrared sensor includes: a package; an infrared detecting element formed on the package, the infrared detecting element including a thermal detector and an absorber formed on the thermal detector which is configured to absorb infrared light rays of a specific wavelength that are detected by conversion of the infrared light rays into heat; and a cap formed on the package to cover the infrared detecting element, the cap including: a body having front and rear surfaces, through which the infrared light rays transmit; and a shielding film, with a window formed therein, provided on at least one of the front and rear surfaces of the body, the infrared light rays being reflected by the shielding film other than a portion of the shielding film having the window, and every one of the infrared light rays passing through the window of the cap impinging on the absorber.
Abstract:
A thermoelectric conversion element includes a pair of electrodes and a pyroelectric material, which is a ferroelectric layer, sandwiched between the pair of electrodes. The pyroelectric material includes at least Bi (bismuth), La (lanthanum), and Fe (iron). The molar fraction of La in a Bi/La site in the crystal structure of the pyroelectric material is 0.15 or more and 0.20 or less. Such a thermoelectric conversion element, and a light detection device and electronic apparatus which include the thermoelectric conversion element have a good pyroelectric function without including Pb (lead).
Abstract:
The infrared detecting element has a first base plate that has a first front surface, a first back surface, a first recessed portion, and an infrared detecting section for detecting infrared rays provided in an area of the first front surface that opposes the first recessed portion; a second base plate that has a second front surface, a second back surface on the opposite side of the second front surface, and a second recessed portion provided in an area of the second back surface that faces the first recessed portion; and an adhesion film that bonds the first back surface and the second back surface, wherein a second outer peripheral portion where the second recessed portion intersects with the second back surface surrounds a first outer peripheral portion where the first recessed portion intersects with the first back surface.
Abstract:
A motion sensor has at least two tiers of monitored volumes that are offset from each other. Electromagnetic radiation, such as infrared light, is directed from the monitored volumes onto at least two sets of detector elements having separate outputs on a pyroelectric substrate of an infrared detector. As a warm object, such as a human or an animal, moves through the monitored volumes, the warmth from the object causes the voltage on the outputs of the infrared detector to change. The resultant waveforms are compared and if the two waveforms have a phase relationship corresponding to a critical phase angle that is based on the pitch of the monitored volumes and the offset between the tiers of monitored volumes, an animal-immune motion indication is generated.