Telephonic communications – Telephone line or system combined with diverse electrical... – Remote control
Patent
1988-05-12
1989-11-21
Ng, Jin F.
Telephonic communications
Telephone line or system combined with diverse electrical...
Remote control
3581941, 455603, 379105, H04M 1100
Patent
active
048827479
ABSTRACT:
An infrared communication device for simultaneously controlling video display systems at a plurality of locations from a single master site. The system is useful with, for example, a teleconferencing system that includes a conventional infrared remote control unit at each conference site and a video display system under the control of an infrared signal transmitted by the remote control unit. the infrared communication device includes an infrared receiver for receiving an infrared control signal, a microprocessor for digitizing the received signal, and a modem. The device also includes an infrared transmitter for retransmitting an infrared control signal identical to the original infrared control signal to the video display system at the master site. A corresponding digitized signal is provided to the modem which communicates with the off-site location over commercial phone lines. The slave modem receives the incoming digital signal which is decoded and then retransmitted as an infrared control signal at that site. A plurality of such infrared communication devices may be used at a plurality of conferencing locations and used in various master/slave modes. In a broad aspect, the communication device may be adapted for use with any infrared light activated video control system and to control systems other than video display systems.
REFERENCES:
patent: 4628541 (1986-12-01), Beavers
patent: 4771283 (1988-09-01), Imoto
patent: 4785472 (1988-11-01), Shapiro
Chan Wing F.
Ng Jin F.
Sales Michael W.
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