Circuit for blanking the video of a television set for a time af

Details Circuit for blanking the video of a television set for a time af Circuit for blanking the video of a television set for a time af

1986-02-04

1987-09-08

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 74, H04N 973, H04N 916

Patent

active

046927930

ABSTRACT:
A color picture tube for displaying a color picture which has a signal supply that includes a plurality of primary color signal channels for supplying a plurality of primary color signals to the color picture tube and current detecting means connected to the signal supply so as to detect currents flowing through the color picture tube and an automatic white balance circuit for controlling the signal supply in response to the detected currents detected by the current detecting means including a power responsive circuit for generating a control signal when a power switch for the television receiver is turned on and a gate pulse generator which blanks except during reference signal insertion connected to the signal supply to inhibit the supply of primary color signals to the picture display means and first circuit means connected to the power responsive circuit to actuate the gate pulse generator when the power switch is turned on and second circuit means connected to the current detecting means for deactuating the gate pulse generator after the current which flows through the display tube exceeds a predetermined value.

REFERENCES:
patent: 4356508 (1982-10-01), Okada
patent: 4450476 (1984-05-01), Tallant
patent: 4587566 (1986-05-01), Hinn

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