Correction of horizontal and vertical deflection waveforms

In a CRT display horizontal/vertical synchronizing signals (H, V) are separated from a video signal (CVBS) in a synchronizing separation circuit (1). Position information S of a vertical frame is generated on the basis of the horizontal/vertical synchronizing signals in a count-down processor (2) an...

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Bibliographic Details
Main Authors SHIRAHAMA, AKIRA, TAMURA, TAKAHIKO, UESHIMA, JUN
Format Patent
LanguageEnglish
French
German
Published 08.12.2004
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:In a CRT display horizontal/vertical synchronizing signals (H, V) are separated from a video signal (CVBS) in a synchronizing separation circuit (1). Position information S of a vertical frame is generated on the basis of the horizontal/vertical synchronizing signals in a count-down processor (2) and then converted to corrected vertical frame information W in a function circuit (3). The corrected vertical frame information W is provided to a vertical deflection waveform generator (4) and to a horizontal deflection correction waveform generator (5) to produce a vertical deflection waveform signal (VSAW) and a horizontal deflection correcting waveform signal (E/W). The corrected vertical frame information W may be compared with predetermined voltages (Vref) in comparators (7, 8) to detect an effective frame range in the vertical direction.
Bibliography:Application Number: EP19960303888