Ex parte Takita et al.

Board of Patent Appeals and Interferences

Dec 7, 1999

08132998 (B.P.A.I. Dec. 7, 1999)

Application for patent filed October 7, 1993.1
1
THIS OPINION WAS NOT WRITTEN FOR PUBLICATION
The opinion in support of the decision being entered today
(1) was not written for publication in a law journal and
(2) is not binding precedent of the Board.
Paper No. 21
UNITED STATES PATENT AND TRADEMARK OFFICE
_____________
BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
_____________
Ex parte ISAO TAKITA,
TSUTOMU FURUHASHI, HIROYUKI NITTA, TOSHIO FUTAMI
and
SATORU TSUNEKAWA
_____________
Appeal No. 1997-0830
Application 08/132,9981
______________
HEARD: November 16, 1999
_______________
Appeal No. 1997-0830
Application 08/132,998
2
Before FLEMING, RUGGIERO and LALL, Administrative Patent
Judges.
FLEMING, Administrative Patent Judge.
DECISION ON APPEAL
This is a decision on appeal from the final rejec-
tion of claims 5 through 18, 27 through 50, and 64 through 77,
all of the claims pending in the present application.
Claims 1 through 4, 19 through 26, and 51 through 63 have been
cancelled.
The invention relates to a liquid-crystal driving
circuit for use in a liquid-crystal display system.
Independent claim 64 is reproduced as follows:
64. A liquid-crystal display system for tonal
displays, including:
a liquid-crystal panel having a plurality of scan-
ning lines and a plurality of data lines;
a Y driver circuit by which one of the plurality of
scanning lines to have a voltage applied thereto is selected,
and which transmits the voltage to the selected one of the
plurality of scanning lines;
Appeal No. 1997-0830
Application 08/132,998
3
an X driver circuit which is supplied with display
data, and which transmits a voltage corresponding to the
display data to each of the plurality of data lines;
a power source, which supplies voltages to the Y
driver circuit and the X driver circuit, the supply voltages
of the X driver circuit being n voltages having different n
voltage levels;
a control signal generator circuit for generating a
time signal which divides one horizontal scanning cycle into a
first period and a subsequent second period;
wherein said X driver circuit includes a voltage
divider circuit which generates m voltages having m different
voltage levels from said n voltages of n different voltage
levels
supplied from said power source (n