公开(公告)号：US4096559A

公开(公告)日：1978-06-20

申请号：US804385

申请日：1977-06-07

申请人： Hiroshi Sakurada ,  Toshihiko Tojo

发明人： Hiroshi Sakurada ,  Toshihiko Tojo

IPC分类号： H05B6/68 ,  H02M3/315 ,  H02M7/515 ,  H02M7/525 ,  H03B9/10

CPC分类号： H02M7/525 ,  H02M3/3155 ,  H03B9/10

摘要： A power supply circuit for a high voltage driven device, particularly a magnetron, is described. The power supply circuit comprises first and second switching elements, an inverter circuit including a commutating reactor connected in series with the first and second switching elements and a capacitor connected to a center tap of the commutating reactor, a transformer connected to an output of the inverter circuit, and a third switching element connected in parallel with a series circuit comprising the capacitor, the primary winding of the transformer and a portion of the commutating reactor. When the magnitude of a current flowing in the transformer exceeds a predetermined level, the third switching element is fired to establish a discharge loop for the capacitor through the series circuit whereby the amplitude of the current supplied to the transformer is limited below the predetermined level.

摘要翻译： 描述了用于高电压驱动装置，特别是磁控管的电源电路。 电源电路包括第一和第二开关元件，包括与第一和第二开关元件串联连接的换向电抗器的反相器电路和连接到换向电抗器的中心抽头的电容器，连接到逆变器的输出端的变压器 电路以及与包括电容器，变压器的初级绕组和换向电抗器的一部分的串联电路并联连接的第三开关元件。 当在变压器中流动的电流的大小超过预定电平时，第三开关元件被点火，以通过串联电路建立用于电容器的放电回路，由此提供给变压器的电流的幅度被限制在预定水平以下。

公开(公告)号：US4759612A

公开(公告)日：1988-07-26

申请号：US888429

申请日：1986-07-23

申请人： Hideaki Nakatsuka ,  Mikio Kanazaki ,  Yasuhiko Kando ,  Toshihiko Tojo ,  Shinji Hasegawa

发明人： Hideaki Nakatsuka ,  Mikio Kanazaki ,  Yasuhiko Kando ,  Toshihiko Tojo ,  Shinji Hasegawa

IPC分类号： G02F1/133 ,  G02F1/1335 ,  G02F1/139 ,  G02F1/13

CPC分类号： G02F1/1397 ,  G02F1/133533

摘要： A liquid crystal display device comprises a liquid crystal layer sandwiched between upper and lower electrode substrates subjected to aligning treatment. The liquid crystal layer includes a nematic liquid crystal added with a chiral material and has a 160.degree.-360.degree. twisted helical structure. A pair of polarizers are disposed adjacent to the electrode substrates with their polarization or absorption axes inclined by respective predetermined angles with respect to the aligning directions of the electrode substrates. At least one of the polarizers is formed by a color polarizer for compensating a wavelength dependence of transmittance (or the coloring due to birefringence) resulting from the anti-coincidence between the polarization or absorption axis of the polarizer and the aligning direction of the electrode substrate, i.e. an optical axis of liquid crystal molecules adjacent to the substrate, so that light emerging from the device becomes approximately achromatic or colorless.

摘要翻译： 液晶显示装置包括夹在经过对准处理的上电极基板和下电极基板之间的液晶层。 液晶层包括添加有手性材料的向列型液晶，并具有160°-360°扭曲的螺旋结构。 一对偏振器邻近电极基板设置，其极化或吸收轴相对于电极基板的排列方向倾斜各自的预定角度。 偏振器中的至少一个由彩色偏振器形成，用于补偿由偏振片的偏振或吸收轴与电极基板的排列方向之间的反重合导致的透射率（或由于双折射引起的着色）的波长依赖性 即与基板相邻的液晶分子的光轴，使得从该器件出射的光变成大致无色或无色。