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41. 发明公开

EP0229287A3 Optical change-over switch 失效
标题翻译：光转换开关
公开(公告)号：EP0229287A3
公开(公告)日：1989-05-24
申请号：EP86116694.0
申请日：1986-12-01
申请人： HITACHI, LTD.
发明人： Gunji, Yasuhiro , Okada, Sadayuki , Isogai, Masato , Kondo, Katsumi , Ibamoto, Masahiko , Kuwabara, Kazuhiro Hitachi Ibaraki Kogyo , Kanke, Atsushi
IPC分类号： G02F1/31 , G02F1/137
CPC分类号： G02F1/1326 , G02F1/141
摘要： The liquid crystal cell (30) for the optical change-over switch comprises a pair of transparent substrates (l), a pair of transparent flat electrodes (2) provided on the respective opposing surfaces of the substrates, orientation control films (3) provided on the flat electrodes (2), two pair of comb shaped electrodes (33) respectively provided on the orientation control films (3), and a ferroelectric liquid crystal layer (4) confined between the substrates (l). The optical incidence plane (3l) to the cell (30) is so selected that the plane (3l) is away from the helical axes (9) of the ferroelectric liquid crystal in the cell (30) in the order of somewhat greater than the tilt angle ( ϑ t ) of the ferroelectric liquid crystal. The pair of flat electrodes (2) generate a first electric field (37a) perpendicular to the layer (32) and orient the long axes of the ferroelectric liquid crystal molecules into a first orientation (35a′) parallel to the layer (32) to induce a first refractive index which causes simultaneous reflection of unpolarized light beam (7 + 8) with a predetermined incidence angle ( ϑ ). The two pair of comb shaped electrodes (33) generate a second electric field (37b′) parallel to the layer and perpendicular to the helical axes (9) and orient the long axes of the molecules into a second orientation (35b′) not in parallel to the layer (32) to induce a second refractive index which causes simultaneous transmission of the unpolarized light beam (7 + 8) with the predetermined incidence angle ( ϑ ).

42. 发明公开

EP0304939A2 Optical part including integral combination of optical fiber and light emitting or receiving element and method of manufacturing the same 失效
标题翻译：光学元件，包括一个光纤和一个光发射或光接收元件，并且其制造方法的复合化合物。
公开(公告)号：EP0304939A2
公开(公告)日：1989-03-01
申请号：EP88113967.9
申请日：1988-08-26
申请人： HITACHI, LTD. , HITACHI CABLE, LTD.
发明人： Tanno, Seikichi , Taketani, Noriaki , Eguchi, Shuji , Asano, Hideki , Shimazaki, Yukio , Takuma, Yuuetsu , Ibamoto, Masahiko , Mukai, Junji
IPC分类号： G02B6/42 , C08F220/10 , G01F23/28 , B29D11/00 , B29C39/00
CPC分类号： G02B6/4202 , G01F23/2927 , G01P3/486 , G02B6/4212 , G02B6/4298
摘要： An optical part for light transmission comprises a light conductor formed of a core (23) of a transparent material and a clad (24) of a material having a smaller refractive index than the core material, and a light emitting and/or receiving element (21), wherein the light emitting and/or receiving element (21) is integrally combined with the core (23) of the light conductor by a material which is the same as that of the core material or by a material having the same refractive index as the core material and having a greater rigidity than the material forming the clad and/or jacket (24). The optical part can be used in a high temperature environment as well as a room temperature environment without involving any appreciable loss in light transmission.
摘要翻译：用于光传输的光学部件包括形成的透明材料并且具有比所述芯材小的折射率的材料构成的包层（24）的芯（23）的一个光导体和发光和/或接收元件（ 21）worin光发射和/或接收元件（21）一体地通过材料的光导体的芯（23），所有这些是相同的那样芯材的或由一个材料具有相同的折射率组合作为芯材，并具有比形成包层和/或护套（24）的材料具有更大的刚性。该光学部件可在高温环境下以及不涉及在光传输任何明显的损失室温环境中使用。

43. 发明公开

EP0229287A2 Optical change-over switch 失效
标题翻译：光学转换开关
公开(公告)号：EP0229287A2
公开(公告)日：1987-07-22
申请号：EP86116694.0
申请日：1986-12-01
申请人： HITACHI, LTD.
发明人： Gunji, Yasuhiro , Okada, Sadayuki , Isogai, Masato , Kondo, Katsumi , Ibamoto, Masahiko , Kuwabara, Kazuhiro Hitachi Ibaraki Kogyo , Kanke, Atsushi
IPC分类号： G02F1/31 , G02F1/137
CPC分类号： G02F1/1326 , G02F1/141
摘要： The liquid crystal cell (30) for the optical change-over switch comprises a pair of transparent substrates (l), a pair of transparent flat electrodes (2) provided on the respective opposing surfaces of the substrates, orientation control films (3) provided on the flat electrodes (2), two pair of comb shaped electrodes (33) respectively provided on the orientation control films (3), and a ferroelectric liquid crystal layer (4) confined between the substrates (l). The optical incidence plane (3l) to the cell (30) is so selected that the plane (3l) is away from the helical axes (9) of the ferroelectric liquid crystal in the cell (30) in the order of somewhat greater than the tilt angle ( ϑ t ) of the ferroelectric liquid crystal. The pair of flat electrodes (2) generate a first electric field (37a) perpendicular to the layer (32) and orient the long axes of the ferroelectric liquid crystal molecules into a first orientation (35a′) parallel to the layer (32) to induce a first refractive index which causes simultaneous reflection of unpolarized light beam (7 + 8) with a predetermined incidence angle ( ϑ ). The two pair of comb shaped electrodes (33) generate a second electric field (37b′) parallel to the layer and perpendicular to the helical axes (9) and orient the long axes of the molecules into a second orientation (35b′) not in parallel to the layer (32) to induce a second refractive index which causes simultaneous transmission of the unpolarized light beam (7 + 8) with the predetermined incidence angle ( ϑ ).
摘要翻译：用于光学切换开关的液晶单元（30）包括一对透明基板（1），设置在基板的各个相对表面上的一对透明平板电极（2），提供的定向控制膜（3）在平板电极（2）上，分别设置在定向控制膜（3）上的两对梳形电极（33）以及被限制在基板（1）之间的铁电液晶层（4）。到单元（30）的光入射平面（31）被这样选择，使得平面（31）远离单元（30）中的铁电液晶的螺旋轴（9），其顺序略大于铁电液晶的倾角（θt）。该对平板电极（2）产生垂直于层（32）的第一电场（37a），并将铁电液晶分子的长轴定向成平行于层（32）到第一方向（35a'）的第一方向引起第一折射率，该第一折射率引起具有预定入射角（θ）的非偏振光束（7 + 8）的同时反射。两对梳形电极（33）产生平行于层且垂直于螺旋轴（9）的第二电场（37b'），并且将分子的长轴定向成未进入的第二方向（35b'）平行于层（32）以引起第二折射率，该第二折射率引起具有预定入射角（θ）的非偏振光束（7 + 8）的同时透射。

44. 发明授权

EP0073045B1 Method of controlling an induction motor by a PWM inverter 失效
标题翻译：通过PWM逆变器控制感应电动机的方法
公开(公告)号：EP0073045B1
公开(公告)日：1986-12-10
申请号：EP82107656.9
申请日：1982-08-20
申请人： Hitachi, Ltd.
发明人： Tanamachi, Tokunosuke , Narita, Hiroshi , Ibamoto, Masahiko , Okamatsu, Shigetoshi
IPC分类号： H02M7/70 , H02P7/63
CPC分类号： H02M7/527

45. 发明公开

EP0073045A2 Method of controlling an induction motor by a PWM inverter 失效
标题翻译：通过PWM逆变器控制感应电动机的方法
公开(公告)号：EP0073045A2
公开(公告)日：1983-03-02
申请号：EP82107656.9
申请日：1982-08-20
申请人： Hitachi, Ltd.
发明人： Tanamachi, Tokunosuke , Narita, Hiroshi , Ibamoto, Masahiko , Okamatsu, Shigetoshi
IPC分类号： H02M7/70 , H02P7/63
CPC分类号： H02M7/527
摘要： For controlling the rotational speed of an induction motor (3), a pulse-width modulated inverter (2) is provided which converts direct current to alternating current, the converted current being fed to the motor (3). The output voltage and frequency of the inverter (2) is controlled in relation to the motor speed by changing the number of pulses in a half-cycle of the inverter output voltage in accordance with the DC supply voltage and/or with the motor current and/or in accordance with electrical fluctuations which are disturbances in a controlling system for the inverter output voltage.
摘要翻译：为了控制感应电动机（3）的转速，提供脉宽调制逆变器（2），其将直流电转换成交流电，转换后的电流被馈送到电动机（3）。逆变器（2）的输出电压和频率通过根据直流电源电压和/或电动机电流改变逆变器输出电压的半周期中的脉冲数来控制与电动机速度相关的 /或者根据作为逆变器输出电压的控制系统中的干扰的电气波动。

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