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Patent Searching and Data


Title:
INTERCOM SYSTEM
Document Type and Number:
Japanese Patent JP2000115386
Kind Code:
A
Abstract:

To provide an intercom system with which a video signal is transmitted to a cordless handset and the cordless handset transmits a control data signal.

A cordless handset of the intercom system is provide with an ultrasonic wave reception circuit 302 that receives an ultrasonic wave signal from an interphone master set, a separation circuit 303 that separates a video signal from the received ultrasonic wave signal, a monitor unit 306 that outputs the separated video signal on its screen, a multiplexer circuit 316 that multiplexes a voice signal from a handset microphone on other data signals, a radio wave transmission circuit 317 that transmits the multiplexed voice signal to the interphone master set, an electric lock unlocking button 312, that is operated by the user confirming a visitor displayed on the monitor unit 306 and transmits a unlock control data signal 314 to unlock an electric lock unit 208, and a motor controller 313 that transmits a panning/tilting control data signal 315 to drive a monitor unit 112 thereby applying panning/tilting control to a camera unit 103.


Inventors:
OHASHI TERUO
Application Number:
JP28273398A
Publication Date:
April 21, 2000
Filing Date:
October 05, 1998
Export Citation:
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Assignee:
AIPHONE CO LTD
International Classes:
H04N7/18; E05B49/00; H04B1/38; H04B1/3822; H04B11/00; H04M1/03; H04M9/00; (IPC1-7): H04M9/00; E05B49/00; H04B1/38; H04B11/00; H04M1/03; H04N7/18
Attorney, Agent or Firm:
Moriya Kazuo