公开(公告)号：US4386836A

公开(公告)日：1983-06-07

申请号：US220484

申请日：1980-12-29

申请人： Kenji Aoki ,  Haruo Nakamura ,  Teiji Miura ,  Mitsuo Nagata

发明人： Kenji Aoki ,  Haruo Nakamura ,  Teiji Miura ,  Mitsuo Nagata

IPC分类号： F02B75/02 ,  G02F1/133 ,  G03G15/32 ,  G06K15/12 ,  G03G15/00

CPC分类号： G06K15/1252 ,  G02F1/133 ,  G03G15/326 ,  F02B2075/027

摘要： An electro-photographic printer utilizing a liquid crystal material which operates as a light valve. The liquid crystal material is sandwiched between two base plates which include electrodes which define a plurality of micro-shutters. A light source illuminates one side of the liquid crystal material. A driving circuit selectively applies driving signals to the electrodes for selectively opening and closing the micro-shutters to allow light from the light source to pass therethrough. A photo-sensitive drum on the other side of the liquid crystal receives the light transmitted through the liquid crystal to form characters. The characters are transmitted to a recording paper. The liquid crystal material, which has an inverted dielectric anisotropy on opposite sides of the critical frequency, is selectively driven by selectively applying two different frequency signals to the liquid crystal.

摘要翻译： 利用作为光阀操作的液晶材料的电子照相打印机。 液晶材料夹在包括限定多个微快门的电极的两个基板之间。 光源照亮液晶材料的一侧。 驱动电路选择性地向电极施加驱动信号，用于选择性地打开和关闭微快门以允许来自光源的光通过。 液晶另一侧的感光鼓接收透过液晶的光线形成字符。 这些字符被传送到记录纸。 通过选择性地将两个不同的频率信号施加到液晶来选择性地驱动具有临界频率的相对侧上的反向介电各向异性的液晶材料。

公开(公告)号：US4236155A

公开(公告)日：1980-11-25

申请号：US962747

申请日：1978-11-21

申请人： Mitsuo Nagata

发明人： Mitsuo Nagata

IPC分类号： G02F1/139 ,  G09G3/36 ,  G06F3/14

CPC分类号： G09G3/3622 ,  G02F1/1392

摘要： A liquid crystal display device suitable for a matrix display of a large number of lines of picture cells can nevertheless provide high contrast. The liquid crystal material used in the device is suitable for operating in the twisted nematic mode and has a dielectric anisotropy which is positive at low frequency and negative at high frequency. A timing signal is provided to the picture cell, the timing signal comprising a high frequency component and a low frequency component such that the dielectric anisotropies of the liquid crystal are at least nearly equal and opposite in sign. In addition a data signal is supplied, said data signal being equal in frequency to one or the other of the components in the timing signal. The signals are utilized in driving the display by suitable matrix-addressing.

摘要翻译： 适用于大量图像单元的矩阵显示的液晶显示装置可以提供高对比度。 在该装置中使用的液晶材料适用于扭转向列模式的操作，并且具有在低频下为正的高介电各向异性且在高频下为负的介电各向异性。 定时信号被提供给图形单元，定时信号包括高频分量和低频分量，使得液晶的介电各向异性至少几乎相等并相反。 此外，提供数据信号，所述数据信号的频率与定时信号中的一个或另一个分量相等。 这些信号用于通过适当的矩阵寻址来驱动显示器。