Multiscreen display circuit for displaying video signal sources having different aspect ratios
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United States of America Patent
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-
Nov 15, 1994
Grant Date -
N/A
app pub date -
Jun 8, 1992
filing date -
Jun 13, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention sequentially selects and outputs one of a plurality of video image sources 1 by an image signal source switching means 2, processes the video images by thinning circuit portions 3 and 4, writes in the video data into an image memory 5 and display the images on an image display device 6. Depending upon the detection output of an aspect ratio detecting circuit portion 12, which detects an aspect ratio of an image display of each of the video image source 1, thinning ratios of the thinning circuits 3 and 4 and a write in control circuit portion 9 for the image memory are switched in order to obtain a multiscreen display circuit which can display video signal sources having different aspect ratios.
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