Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
1998-07-21
2001-06-05
Shalwala, Bipin (Department: 2673)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S426000, C348S661000
Reexamination Certificate
active
06243083
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a video signal processor or processing circuit suited for being used in, for example, a display for a computer.
2. Description of the Related Art
In a conventional display for a computer, for example, because a video signal produced by the computer is generally high in contrast, such the video signal is displayed as it is on the display without being emphasized in its contour.
In recent years, however, with the spread of a so-called internet, a CD-ROM and the like, fetching of a photograph, a natural picture image and a moving picture to a computer is carried out. In that case, a video signal obtained by fetching the natural picture image is different from a video signal produced by the conventional computer in that, for example, its contour and the like are apt to be blurred. Therefore, when such the video signal is displayed on a display, a fear that a clear-cut image can not be obtained is arising.
SUMMARY OF THE INVENTION
Therefore, according to the present invention, a plurality of inputted primary color signals are mixed at a predetermined ratio respectively, and a high frequency component of the mixed signal is extracted and added to each of the plurality of primary color signals, by which the contour of the video signals such as an natural picture image or the like can be corrected and a clear-cut picture image can be obtained.
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Arimizu Akira
Inoue Toshiaki
Mitarai Shozo
Kananen Ronald P.
Osorio Ricardo
Rader Fishman & Grauer
Shalwala Bipin
Sony Corporation
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