Appeal No. 97-2028
Application No. 07/954,290
layer loses a spiral molecular alignment thereof to establish two
bi-stable molecular alignments;
drive means connected to the plurality of scanning
electrodes for applying scanning electrode signals and
sequentially applying selecting scanning electrode signals to
each of the plurality of scanning electrodes and connected to the
plurality of display electrodes for applying display electrode
signals synchronized with the scanning electrode signals to the
plurality of display electrodes; and
converting means for converting the two bi-stable molecular
alignments to corresponding optical ON and OFF display states,
respectively;
wherein selecting electrical signals produced by combining
the selecting scanning electrode signals and the display
electrode signals are applied to the layer between the scanning
electrodes and the display electrodes in a selecting period of
the scanning electrodes for sufficiently changing one of the two
bi-stable molecular alignments to the other bi-stable molecular
alignment and A.C. electric signals produced by combining the
scanning electrode signals and the display electrode signals, the
A.C. electric signals having an amplitude and a pulse width
insufficient to change the bi-stable molecular alignments, and
are applied to the layer between the scanning electrodes and the
display electrodes in a non-selecting period of the scanning
electrodes to hold the other bi-stable molecular alignment, such
that the pulse width of each voltage polarity included in the
A.C. electric signals does not exceed a time width of said each
selecting period of the scanning electrode.
The reference relied on by the examiner is:
Kawakami et al. (Kawakami) 4,062,626 Dec. 13, 1977
Claims 42 through 116 stand rejected on the ground of
interference estoppel.
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