| 摘要 |
PROBLEM TO BE SOLVED: To provide an intercom system capable of setting the sensor detection area of a sensor camera in details by the operation of a living room master unit. SOLUTION: A human sensitive sensor includes: a pyroelectric sensor element 17; an optical lens composed of many lens small bodies 19a for dividing far infrared rays in the imaging range of a camera into prescribed areas and making them be incident on the pyroelectric sensor element 17; a transmission type liquid crystal panel 18 installed between the pyroelectric sensor element 17 and the optical lens 19, where mask areas 18a for shielding the far infrared rays are divided and formed matched with the prescribed areas; and a liquid crystal panel control part 15 for ON/OFF controlling the respective mask areas 18a of the liquid crystal panel 18. The living room master unit is provided with a mask area setting part for operating the liquid crystal panel 18. COPYRIGHT: (C)2009,JPO&INPIT
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