Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-06-28
2000-02-08
Zimmerman, Mark K.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345132, 348443, G09G 500
Patent
active
060232625
ABSTRACT:
A graphics controller circuit in a computer system for generating display signals to a television. The graphics controller circuit may downscale a display image to generate a downscaled image. While downscaling, the graphics controller circuit may generate each horizontal line of a downscaled image from a different number of horizontal lines of a display image. In addition, the graphics controller circuit uses clock signals with different frequencies so as to generate each horizontal line of the downscaled image in the same amount of time. The clock frequencies are designed to generate downscaled image horizontal lines at an input rate required for a television. In effect, the graphics controller circuit may avoid dropping display image horizontal lines while downscaling, and also reduce flicker while displaying the downscaled image on a television.
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Bell Robert P.
Cirrus Logic Inc.
Laneau Ronald
Shaw Steven A.
Zimmerman Mark K.
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