Appeal No. 2002-0587 Page 9
Application No. 08/922,300
enough rate so that transistor 58 will be turned on to cause the
beam to be horizontally deflected off the screen.”
From the disclosure of Martin that voltages +V4 and +V5 will
decay off at a slow enough rate so that transistor 58 will be
turned on to cause the beam to be deflected off of the screen if
the power supply fails, we find that Martin teaches gradually
lowering the input voltages +V4 and +V5 to the deflection yoke
when the power supply to the display device is interrupted.
Although we agree with appellant (brief, page 8) that modifying
the admitted prior art by slowly dropping the voltage at the
control grid as taught by Martin would only result in slowly
dropping the voltage at the control grid in the admitted prior
art, we find that Martin's additional teaching of slowly decaying
the voltage to the horizontal deflection yoke would have
suggested to an artisan gradually dropping the voltage of the
voltage source V1 of the horizontal/vertical constant voltage
circuit of the admitted prior art. Accordingly, we do not agree
with appellant's assertion (brief, page 8) that "Martin only
teaches, slowly dropping the voltage at the control grid 14 of
the monitor" (underlining added).
With respect to appellant's assertion (reply brief, page 7)
that the present invention is directed toward a display device
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