<p>As a signal seeking tuner tunes through a number of channels to locate the next active (useable) channel, the display screen of a television receiver is blanked when the receiver is tuned between channels or to an inactive (unuseable) channel for which video signal information is substantially absent. Superimposed over the blanked screen background is a moveable tuning indicator bar, the position of which indicates the channel to which the receiver is tuned. The blanking of the screen prevents the tuning indication from being obscured by background noise.</p>
申请公布号
DE3437501(A1)
申请公布日期
1985.04.25
申请号
DE19843437501
申请日期
1984.10.12
申请人
RCA CORP., NEW YORK, N.Y., US
发明人
MATURO, ROBERT JOSEPH, BRICK, N.J., US;CHIN, DANNY, PLAINSBORO, N.J., US;HENDERSON, JOHN GOODCHILDE NORIE, PRINCETON, N.J., US