Appeal No. 97-2020
Application 07/957,107
generally available to one of ordinary skill in the art, that
would have led one to combine the relevant teachings. Ashland
Oil, Inc. v. Delta Resins & Refractories, Inc., 776 F.2d 281,
297 n.24, 227 USPQ 657, 667 n.24 (Fed. Cir. 1985), cert.
denied, 475 U.S. 1017 (1986).
Here, knowledge by the person of ordinary skill in
the art would have included an awareness that the three drive
methods of De Jule (those including amplitude modulation,
width modulation and a combination of both) were different,
and
that each would have provided its own distinct operating
characteristics for matrix displays, with inherent advantages
and disadvantages. That person would have been motivated to
combine the above teaching of De Jule to the admitted prior
art to overcome disadvantages of the purely amplitude
modulated system of the admitted prior art and/or to benefit
from the one or more advantages to be realized by utilizing De
Jule's combined amplitude and width modulated drive signals
with a matrix display. It is a self-evident proposition that
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