公开(公告)号：EP0415772A2

公开(公告)日：1991-03-06

申请号：EP90309516.4

申请日：1990-08-30

申请人： CANON KABUSHIKI KAISHA

发明人： Adachi, Hideki ,  Takizawa, Mitsuharu ,  Nakayama, Miho ,  Fukada, Taisei ,  Nakamura, Shinichi ,  Kuroyanagi, Satoshi ,  Tahara, Hisatsugu ,  Ozaki, Hiroshi ,  Miyata, Masanori

IPC分类号： G03G15/00 ,  G05D13/62

CPC分类号： H02P23/186 ,  Y10S706/90

摘要： In the present invention, the velocity of a motor is controlled by fuzzy inferential reasoning in a transitional period when the motor is started, changed in speed, reversed or stopped. Such fuzzy control eliminates an increase in the length of transitional period caused by a limitation in supply current under conventional PLL control and makes possible a rapid transition to a target velocity. A plurality of fuzzy rules (1030a) are provided and one of these fuzzy rules (1030a) is selected in accordance with the length of the previous transitional period, thereby suppressing the effects of load fluctuation and the influence of a fluctuation in torque caused by a rise in temperature. Therefore, the length for transitional control of a motor can be shortened and the apparatus is reduced in size.

摘要翻译： 在本发明中，马达的启动速度，转速，反转或停止等过渡期间，通过模糊推理来控制马达的速度。 这种模糊控制消除了在常规PLL控制下由供电电流限制引起的过渡周期长度的增加，并且使得能够快速转换到目标速度。 提供多个模糊规则（1030a），并且根据前一过渡时段的长度选择这些模糊规则（1030a）中的一个，从而抑制负载波动的影响和由 温度升高 因此，可以缩短电动机的过渡控制的长度，并且减小装置的尺寸。

公开(公告)号：EP0355374A3

公开(公告)日：1990-03-07

申请号：EP89112756.5

申请日：1989-07-12

申请人： CANON KABUSHIKI KAISHA

发明人： Yamashita, Masataka ,  Togano, Takeshi ,  Terada, Masahiro ,  Yoshida, Akio ,  Kimura, Yoshiko ,  Shinjo, Kenji ,  Kitayama, Hiroyuki ,  Nakamura, Shinichi

IPC分类号： C09K19/42 ,  C09K19/02 ,  G02F1/13

CPC分类号： C09K19/42

摘要： A ferroelectric chiral smectic liquid crystal composition, comprising at least one optically active compound represented by the following formula (I):
wherein R, denotes a linear or branched alkyl group having 1 - 18 cabon atoms capable of having a substituent; R 2 denotes a linear or branched alkyl group having 1 - 14 carbon atoms capable of having a substituent; and X 1 denotes a single bond, -0- or -
and at least one optically active compound represented by the following formula (II): wherein R 3 denotes a linear alkyl group having 1 - 14 carbon atoms; R 4 denotes a linear or branched alkyl group having 1 - 14 carbon atoms capable of having a substituent; and X 2 denotes a single bond, -O- or

公开(公告)号：EP0267585A3

公开(公告)日：1990-01-24

申请号：EP87116600.5

申请日：1987-11-10

申请人： CANON KABUSHIKI KAISHA

发明人： Nohira, Hiroyuki ,  Kamei, Masano ,  Nakamura, Shinichi ,  Katagiri, Kazuharu ,  Terada, Masahiro ,  Yamashita, Masataka ,  Yamada, Yoko, Canon-Ryo ,  Shinjo, Kenji Canon-Ryo ,  Iwaki, Takashi Honatsugi Inoue Bldg. ,  Hioki, Chieko ,  Yoshida, Akio ,  Uchimi, Toshiharu Canon-Ryo

IPC分类号： C09K19/42 ,  C09K19/46

CPC分类号： C09K19/46 ,  C07C327/00 ,  C09K19/2021 ,  C09K19/2028 ,  C09K19/28 ,  C09K19/42

摘要： A liquid crystal composition, comprising: at least one optically active mesomorphic compound having an asymmetric carbon atom to which a fluorine atom is directly bonded, and at least one mesomorphic compound having an optically active group represented by the following formula (1):
wherein R 1 denotes a linear or branched alkyl group having 1 - 18 carbon atoms, x is 0 or 1, y is an integer of 0 - 8, and C* denotes an asymmetric carbon atom.

公开(公告)号：EP0237007A3

公开(公告)日：1988-02-24

申请号：EP87103332

申请日：1987-03-09

申请人： CANON KABUSHIKI KAISHA

发明人： Nohira, Hiroyuki ,  Kamei, Masanao ,  Nakamura, Shinichi ,  Katagiri, Kazuharu

IPC分类号： C07C69/76 ,  C07C69/773 ,  C07D239/26 ,  C09K19/12 ,  C09K19/08 ,  C09K19/46

CPC分类号： C07D239/26 ,  C09K19/06 ,  C09K19/126 ,  C09K19/2021 ,  C09K19/3463 ,  C09K19/46 ,  C09K19/48

摘要： A fluoroalkane derivative represented by the formula:
wherein R denotes an alkyl group having 1 -16 carbon atoms, C * denotes an asymmetric carbon atom, R' denotes an alkyl or alkoxy group having 1 -16 carbon atoms;
respectively denote a phenylene group
a cyclohexylene group
or a pyrimidinylene group
p is 0 or 1, q is 0 or 1 when p is 1, r is 0 or 1; and I, m and n are respectively 0 or a positive integer satisfying the relationship of l + m + n ≧ 1. The fluoroalkane derivative has a fluorine atom providing a large dipole moment and directly connected to an asymmetric carbon atom, so that it provides a high speed responsive characteristic through an increased spontaneous polarization when contained in a liquid crystal - composition, especially a ferroelectric liquid crystal composition.