Appeal No. 99-0872
Application 08/885,399
sample and hold circuits actually receive incoming digital
signals as input. Instead, the examiner states (Answer at 7):
However, even arguendo that the input signal in the
device of Duwaer is analog, it would have been
obvious for one ordinary skill in the art at the
time the invention was made to use a DAC for
converting the incoming digital signal into analog
signal so that the driving circuitry would have been
able to apply the digital signal to the display
elements having analog operation.
The above-quoted statement is self-contradictory. If it
is assumed that Duwaer’s input signal is analog, as is stated
in the first part of the sentence, then there is no incoming
digital signal for the examiner to properly refer to in the
second part of the same sentence. The examiner further states
(Answer 7):
In addition, it should be noted that applicant also
admitted that a DAC has been used in a conventional
LCD display device for converting the digital input
signal into analog signal (see page 5 in the
specification).
That admission, even if assumed to have been made, does
not help the examiner in an environment where the examiner has
not specifically identified digital input signals for
conversion. None of the other references, Hatada, Ishimaru,
and Fukuda, as relied on and applied by the examiner, cures
the deficiency.
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