Appeal No. 2006-1726
Application No. 09/725,849
the scanning signals supplied to the scanning lines Yj
and Yj-1.
On the other hand, in the scanning signal in the
discharging mode a precharge voltage in an overcharging
period Tdc is set to-VPRE, which is opposite in
polarity to the first selecting voltage (VS1) about the
middle value of data signals, and a second selecting
voltage in a discharging period Td, output
successively, is set to VS2 having the same polarity as
VS1 about the middle value of data signals and smaller
in absolute value than VS1. The overcharging period
Tdc of supply to each of the scanning signals Y1 to Ym
is set as the first half ½ H of one horizontal period H
while the discharging period Td of supply to each of
the scanning signals Y1 to Ym is set as the second half
½ of the one horizontal period H. Tdcj, Tdj, Tdci-1,
and Tdj-1 written in FIGS. 8(B), 8(C), and 8(D)
respectively denote the overcharging and discharging
periods in the discharging modes of the scanning
signals supplied to the scanning lines Yj and Yj-1.
With the above discussion in mind, we find that Takahashi
teaches providing a first selecting voltage as a scanning signal
in a first horizontal period to charge the liquid crystal pixels.
We also find that Takahashi teaches providing a second selecting
voltage in the second half of a second horizontal period to
discharge the overcharge voltage across the liquid crystal pixel
cells. One of ordinary skill in the art would have duly
recognized from Takahashi’s teachings that the two signals are
applied in two different frames for respectively charging and
discharging the liquid crystal pixels. Consequently, we find
error in the Examiner’s stated position, which concludes that
8
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