Appeal No. 1997-0384
Application 08/086,498
given length of time in order to scroll an image across a
screen. Thus, scrolling is concerned with interference
between image frames, whereas refreshing is not.
As specifically recognized by Hilsum, "[r]efreshing is to
be distinguished from resetting or rewriting which involves
changing the information or scene displayed" (column 1, lines
41 to 43). We note that the scrolling of appellants’ claims
on appeal involves just that, rewriting or changing the
information displayed, so that an image appears to scroll
across the screen. Accordingly, although Hilsum discusses a
decay rate in relation to a display, Hilsum concerns
refreshing (activating a display element for a given time) and
not scrolling (unactivating or blanking a display element for
a given time). Indeed, the portion of Hilsum relied on by the
examiner actually describes a display element (element 3 of
11
Figure 3) as being "in the operated state for a period
determined by the length of the pulses plus the decay rate of
the particular display effect used after removal of the
pulses" (Hilsum, column 4, lines 58 to 61).
Appellants argue (Brief, page 4) that Hilsum does not
concern scrolling images on a display. We agree. As
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