Patent ID: 8487258

Claim:
A pyroelectric infrared detection element comprising: a pyroelectric element including a first electrode, a second electrode opposite to said first electrode, and an infrared absorption part having pyroelectric properties and interposed between said first electrode and said second electrode; an output terminal unit including a first output terminal and a second output terminal used for extracting a current generated by said pyroelectric element in response to a change in a temperature; a first wiring part designed to connect said first output terminal to said first electrode; and a second wiring part designed to connect said second output terminal to said second electrode, wherein said first electrode is formed on a first surface of a pyroelectric substrate made of pyroelectric material in a thickness direction, and said second electrode is formed on a second surface of said pyroelectric substrate in the thickness direction, and said infrared absorption part is defined as a part of said pyroelectric substrate interposed between said first electrode and said second electrode, and said first output terminal and said second output terminal are formed on said pyroelectric substrate, and said first wiring part includes a connecting line constituted by an electrically conductive layer formed on said first surface so as to connect said first output terminal to said first electrode, and a canceling line designed to cancel electric charges generated at said connecting line in response to a change in a temperature of said pyroelectric substrate, and said canceling line is constituted by an electrically conductive layer formed on said second surface so as to be not directly connected to said second electrode but to be electrically connected to said connecting line, and said second wiring part includes a second connecting line constituted by an electrically conductive layer formed on said second surface so as to connect said second output terminal to said second electrode, and a second canceling line designed to cancel electric charges generated at said second connecting line in response to a change in a temperature of said pyroelectric substrate, and said second canceling line is constituted by an electrically conductive layer formed on said first surface so as to be not directly connected to said first electrode but to be electrically connected to said second connecting line.