Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1991-07-03
1993-02-02
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Recording apparatus
315381, 358220, H04N 320, H04N 324
Patent
active
051842254
ABSTRACT:
A television receiver includes a high voltage kinescope driver amplifier having an input for receiving a video signal and a further input for receiving a character input signal from a low voltage character amplifier. When switching from a "run" mode to a "stand-by" mode, a control circuit generates a turn-off command signal for disabling the kinescope high voltage supply and concurrently initiating turn-off of the receiver deflection circuit at a controlled rate during a transition interval between the "run" and "standby" operating modes. The turn-off command is further applied during the transition interval to an input of the character amplifier so as to over-ride any character signal which may be present to drive the output of the character amplifier to a maximum brightness level which, in turn, over-rides any video signal applied to the high voltage amplifier. Accordingly, the kinescope is driven to a maximum brightness level during the transition interval regardless of the values of either the video signal or the character signal thereby fully discharging the kinescope, avoiding potential spot burn and preventing after-glow.
REFERENCES:
patent: 3407330 (1968-10-01), Wilmarth
patent: 3462640 (1969-08-01), Eltgroth
patent: 3535445 (1970-10-01), Griffey
patent: 4488181 (1984-12-01), Haferl
patent: 4723167 (1988-02-01), Griffey
Heidebroek Wolfgang
Hsing Zeith W. C.
Coalter Richard G.
Emanuel Peter M.
Kostak Victor R.
Powell Mark R.
Thomson Consumer Electronics S.A.
LandOfFree
Television receiver with spot burn protection and after-glow sup does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Television receiver with spot burn protection and after-glow sup, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Television receiver with spot burn protection and after-glow sup will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-10307