Picture display device arranged for displaying a mixed picture signal as an interlaced television picture
AssigneeU.S. Philips Corporation
InventorJan A. C. Korver
Life of this patent
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Abstract
A picture display device arranged for displaying, as an interlaced television picture, a mixed picture signal on a picture display tube, this picture signal including a television signal produced in accordance with a television standard and a digitally generated picture and/or text information signal, received from, for example, a teletext decoding circuit. In order to eliminate an annoying "jitter" which occurs in a portion of the displayed picture in which the digitally generated picture and/or text information signal is also displayed, a signal is generated which substantially eliminates the interlace in the said portion of the picture.
Claims17
A picture display device having means for displaying as an interlaced television picture on a picture display tube, a mixed picture signal including a television signal produced in accordance with a television standard, a digitally generated picture, and a text information signal, comprising:
- means for generating field and line deflection signals for deflecting one or more electron beams when produced in said picture display tube, and
- means for generating a signal for additionally deflecting said electron beams in the vertical direction for substantially eliminating the interlace in a portion of said displayed picture in which said digitally generated picture and text information signals are displayed, said additional deflection signal having a picture frequency such that the picture lines displayed on said picture display screen of said picture display tube substantially coincide.
Dependencies are inferred from the claim text.