Still picture transmission device

Details Still picture transmission device Still picture transmission device

1990-08-07

1991-09-10

Ng, Jin F.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

358 85, H04N 712, H04N 714

Patent

active

050480723

ABSTRACT:
A picture transmission unit having a detection circuit for detecting a tone signal, a header signal, or still picture data sent from the telephone circuit immediately before the still picture data are sent and recognizing the transmission of the still picture data, a memory for storing the still picture data temporarily, a sub-power source for always feeding power to the picture transmission unit and the memory in addition to a power supply device, a switching means for switching power from the power supply device automatically, and a main control and processing unit for controlling the whole apparatus is provided, in which when the detection circuit detects a tone signal, a header signal, or still picture data and recognizes the transmission of the still picture data, power from the power supply device is turned on to feed the whole apparatus and automatically display the still picture data stored in the memory on a display.

REFERENCES:
patent: 4258387 (1981-03-01), Lemelson et al.
patent: 4291198 (1981-09-01), Anderson et al.
patent: 4485400 (1984-11-01), Lemelson et al.
patent: 4593323 (1986-06-01), Kanda et al.
patent: 4701946 (1987-10-01), Oliva et al.
patent: 4715059 (1987-12-01), Cooper-Hart et al.
patent: 4739413 (1988-04-01), Meyer
patent: 4856045 (1989-08-01), Hoshina

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