Appeal No. 96-0236
Application 08/187,364
address the problem of changes in the voltage-current
characteristics due to aging. This argument is unconvincing
because the claims do not require that the voltage control
signal provide compensation for this particular problem and
the references need not be combined to solve the particular
problem addressed in Appellant's disclosure. In re Beattie,
974 F.2d 1309, 1312, 24 USPQ2d 1040, 1042 (Fed. Cir. 1992).
Appellant also argues that while Hoshino as modified to
employ Kuijk's non-linear switching elements develops a
voltage control signal (CV) that is used to adjust the drive
voltages, the voltage control signal is not "indicative of"
the current in at least one address conductor (i.e., at least
one display element). We agree, because the frequency of the
status variations in the signal electrode data signals, which
frequency is detected and used to generate the voltage control
signal,
has no fixed relationship to the amount of current flowing in
the display elements. Instead, average current is a function
of the frequency and duration of the selection pulses. Thus,
a given frequency of short-duration selection pulses will
provide less average current than the same frequency of long-
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