Circuit for eyesight protection in a television set

Details Circuit for eyesight protection in a television set Circuit for eyesight protection in a television set

1986-05-29

1987-12-29

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

3581941, 340557, 455603, H04N 565

Patent

active

047164697

ABSTRACT:
This disclosure depicts a circuit for protecting eyesight from the screen of a TV set. A infrared transmitter is provided on a side of the front of the TV set so that pulse signals therefrom are received on a receiving-amplifying portion for remote control already installed in the TV set after reflecting upon a viewer within a predetermined distance from the TV screen. A monostable multivibrator has an input for receiving pulse output signals from the remote control receiving-amplifying portion in response to reflected pulse signals applied thereto and also has an output. A delay circuit portion has an input operatively connected to output of the monostable circuit portion and also has an output, producing the level signals on the ouput thereof when higher level signals are applied on its input over a predetermined time and otherwise producing lower level signals. A video amplifier driving circuit portion for controlling the "ON" and "OFF" of an video amplifier has an input operatively connected to the output of the delay circuit portion and also has an output selectively disabling the video amplifier in response to the occurrence of reflected pulse signals for a predetermined period of time.

REFERENCES:
patent: 4417278 (1983-11-01), Hemsleigh et al.

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