公开(公告)号：EP0554109A1

公开(公告)日：1993-08-04

申请号：EP93300664.5

申请日：1993-01-29

申请人： SHARP KABUSHIKI KAISHA

发明人： Koden, Mitsuhiro ,  Tagawa, Akira ,  Takeda, Hitoshi ,  Katsuse, Hirofumi ,  Shiomi, Makoto ,  Numao, Takaji ,  Gouda, Hiroshi ,  Katakami, Masayuki ,  Kondo, Naofumi ,  Katayama, Mikio

IPC分类号： G09G3/36 ,  G02F1/137

CPC分类号： G02F1/141 ,  G02F2203/30 ,  G09G3/2011 ,  G09G3/207 ,  G09G3/3629 ,  G09G3/3651 ,  G09G2310/06 ,  G09G2320/0247

摘要： A liquid crystal display includes a liquid crystal cell including a pair of substrates (1,2) opposite to each other, each substrate having an electrode film and an orientation control layer (9, 19) thereon, and a ferroelectric liquid crystal filled between the substrates; and a pair of polarizing plates which are provided opposite to each other in the state of "cross nicol" on both sides of the liquid crystal cell (18); the ferroelectric liquid crystal being bistable in the liquid crystal cell (18), the polarizing plates being oriented in such a manner that one of their polarizing directions conforms to one of extinction positions of the ferroelectric liquid crystal under no electric field, the liquid crystal cell being applied with an alternating voltage for changing an apparent tilt angle of the ferroelectric liquid crystal depending on the applied voltage value, resulting in display with gray scale.

摘要翻译： 液晶显示器包括：液晶单元，其包括彼此相对的一对基板（1,2），每个基板上具有电极膜和取向控制层（9,19），并且填充在所述液晶单元 基板; 以及在液晶单元（18）的两侧以“十字形尼科”状态彼此相对设置的一对偏振片; 所述铁电液晶在所述液晶单元（18）中是双稳态的，所述偏振片的取向方式为使得其偏振方向之一在无电场下符合所述铁电液晶的消光位置之一，所述液晶单元 施加用于根据施加的电压值改变铁电液晶的表观倾斜角度的交流电压，导致灰度显示。

公开(公告)号：EP0549337A1

公开(公告)日：1993-06-30

申请号：EP92311745.1

申请日：1992-12-23

申请人： SHARP KABUSHIKI KAISHA

发明人： Itoh, Nobuyuki

IPC分类号： G09G3/36

CPC分类号： G09G3/3637 ,  G09G3/2011 ,  G09G3/207

摘要： A liquid crystal display device is provided to realize a tone display. The liquid crystal display is arranged to have a display panel (1) having a plurality of pixels ranged in a matrix manner. Those pixels are formed of a pair of transparent electrodes (5,6) and a liquid crystal layer (4) filled therebetween. A scan voltage (VS) is applied to one transparent electrode (5) for specifying a pixel row. A signal voltage (VD) is applied to the other transparent electrode (6) for defining luminous or non-luminous sections of each pixel. A bias electrode (7) is provided on at least one side of each pixel. Further, a bias voltage (Vb) applying unit is also provided to apply a bias voltage (Vb) for a tone display for adjusting an electric-field gradient along the pixel width onto the bias electrode (7) in synchronous with the application of the signal voltage (VD) onto the other transparent electrode.

摘要翻译： 提供一种实现色调显示的液晶显示装置。 液晶显示器被布置为具有以矩阵方式设置的多个像素的显示面板（1）。 这些像素由一对透明电极（5,6）和填充在其间的液晶层（4）形成。 扫描电压（VS）被施加到用于指定像素行的一个透明电极（5）。 信号电压（VD）被施加到另一个透明电极（6），用于限定每个像素的发光或非发光部分。 偏置电极（7）设置在每个像素的至少一侧。 此外，还提供了偏置电压（Vb）施加单元，以与用于将偏压（Vb）施加单元同时施加用于将用于将像素宽度的电场梯度调整到偏置电极（7）上的色调显示器施加偏压（Vb） 信号电压（VD）到另一个透明电极上。

公开(公告)号：EP0448105A3

公开(公告)日：1993-01-07

申请号：EP91104461.8

申请日：1991-03-21

申请人： CANON KABUSHIKI KAISHA

发明人： Kaneko, Shuzo, Canon Kabushiki Kaisha ,  Yoshida, Akio, Canon Kabushiki Kaisha ,  Fujiwara, Ryoji, Canon Kabushiki Kaisha

IPC分类号： G09G3/36

CPC分类号： G09G3/3651 ,  G09G3/2011 ,  G09G3/207 ,  G09G2310/061 ,  G09G2310/065

摘要： A method of driving an active matrix liquid crystal device, in which pixels of a liquid crystal display device having a memory performance are sequentially driven by an active matrix device, wherein
   after a recording signal voltage to determine an optical state of a liquid crystal of the pixel was applied every pixel, a grounding signal is applied with an elapse of a predetermined time.

公开(公告)号：EP0510606A1

公开(公告)日：1992-10-28

申请号：EP92106873.0

申请日：1992-04-22

申请人： CANON KABUSHIKI KAISHA

发明人： Okada, Shinjiro, c/o Canon Kabushiki Kaisha

IPC分类号： G09G3/36

CPC分类号： G09G3/3637 ,  G09G3/2011 ,  G09G3/207 ,  G09G2310/0205 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2310/065 ,  G09G2320/0209

摘要： A liquid crystal display apparatus has a display section for displaying an image or other data. The display section including scanning electrodes and signal electrodes which are arranged to cross each other to form a matrix of pixels, and a ferroelectric liquid crystal filling the gap between the scanning electrodes and the signal electrodes. The ferroelectric liquid crystal has first stable states in alignment with the direction of an electric field. The apparatus has a circuit for applying a reset pulse (A) to a selected scanning electrode so as to reset all the pixels on the scanning electrode into the first stable state, and a circuit for applying at least writing pulse (B to D) following the reset pulse so as to write the data in such a sequence that the writing into the pixel having the highest inversion threshold level is conducted first. The apparatus also has a control circuit for controlling the timing of application of the pulses in such a manner that a time interval not shorter than a relaxation time, which is the time required for the liquid crystal to be set again to a state exhibiting the same inversion threshold value as that exhibited before the application of the immediately preceding pulse, is preserved between successive pulses.

摘要翻译： 液晶显示装置具有用于显示图像或其他数据的显示部。 显示部分包括布置成彼此交叉以形成像素矩阵的扫描电极和信号电极，以及填充扫描电极和信号电极之间的间隙的铁电液晶。 铁电液晶具有与电场方向对准的第一稳定状态。 该装置具有用于将复位脉冲（A）施加到所选择的扫描电极以将扫描电极上的所有像素复位到第一稳定状态的电路，以及用于至少施加写入脉冲（B至D）的电路 复位脉冲以便首先对具有最高反转阈值电平的像素进行写入的顺序写入数据。 该装置还具有控制电路，用于以这样的方式控制脉冲施加的定时，使得不短于弛豫时间的时间间隔，这是将液晶再次设置为呈现相同状态所需的时间 在施加紧接在前的脉冲之前呈现的反转阈值在连续脉冲之间被保留。

公开(公告)号：EP0284134B1

公开(公告)日：1992-06-17

申请号：EP88200441.9

申请日：1988-03-08

申请人： Philips Electronics N.V.

发明人： Hartmann, Wilbert J. A. M.

IPC分类号： H04N3/12 ,  G09G3/36

CPC分类号： H04N3/127 ,  G09G3/2011 ,  G09G3/207 ,  G09G3/3651 ,  G09G2310/061

公开(公告)号：EP0469531A2

公开(公告)日：1992-02-05

申请号：EP91112750.4

申请日：1991-07-29

申请人： CANON KABUSHIKI KAISHA

发明人： Okada, Shinjiro

IPC分类号： G09G3/36

CPC分类号： G09G3/3637 ,  G09G3/2011 ,  G09G3/207 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2310/065

摘要： A liquid crystal device is formed by a plurality of scanning electrodes, a plurality of data electrodes intersecting the scanning electrodes, and a bistable liquid crystal showing a first stable orientation state and a second stable orientation state disposed between the scanning electrodes and the data electrodes so as to form a pixel at each intersection of the scanning electrodes and the data electrodes. The liquid crystal device is driven according to a scheme wherein a pixel is written in a first orientation state (or at a gradation level k) in two steps including: a first step of applying a prescribed voltage for causing the second orientation state to the pixel and then applying a voltage of at least V 1 (or a voltage Va) to the pixel, and a second step of applying a voltage of at least V 2 (or a voltage Vb) to the pixel, wherein V 1 (Va) denotes a threshold voltage required for converting a pixel in the second orientation state into the first orientation state (into the gradation level k) after applying the prescribed voltage for causing the second orientation state to the pixel in the first orientation state, and V 2 (Vb) denotes a threshold voltage required for converting a pixel in the second orientation state into the first orientation state (into the gradation level k) after applying the prescribed voltage for causing the second orientation state to the pixel in the second orientation state.

摘要翻译： 液晶装置由多个扫描电极，与扫描电极相交的多个数据电极以及设置在扫描电极和数据电极之间的第一稳定取向状态和第二稳定取向状态的双稳态液晶形成，因此 以在扫描电极和数据电极的每个交叉处形成像素。 根据以下步骤驱动液晶装置的驱动：其中像素以第一取向状态（或灰度级k）被写入两个步骤，包括：将规定电压施加到像素的第二取向状态的第一步骤 然后对像素施加至少为V1（或电压Va）的电压，以及向像素施加至少为V2（或电压Vb）的电压的第二步骤，其中V1（Va）表示阈值电压 在将用于使第二取向状态的第二取向状态施加到第一取向状态的像素的规定电压之后，将第二取向状态的像素转换为第一取向状态（灰度级k），V2（Vb）表示阈值 在将用于使第二取向状态施加到第二定向中的像素的规定电压之后，将第二取向状态的像素转换为第一取向状态（灰度级k）所需的电压 状态。

公开(公告)号：EP0453856A2

公开(公告)日：1991-10-30

申请号：EP91105547.3

申请日：1991-04-08

申请人： CANON KABUSHIKI KAISHA

发明人： Okada, Shinjiro

IPC分类号： G09G3/36 ,  H04N3/12

CPC分类号： G09G3/3637 ,  G09G3/2011 ,  G09G3/207 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2320/041 ,  H04N3/127

摘要： A liquid crystal display apparatus which has a display section in which a group of scan electrodes and a group of signal electrodes are arranged in a matrix shape and a ferroelectric liquid crystal having a bistability in the direction of an electric field is filled between both of said electrode groups and displays an image or information, comprising:
   means for sequentially writing gradation information from a pixel having a high threshold value on a scan line by a pulse to completely reset all of pixels on a selected scan electrode into a first stable state and one or a plurality of pulses subsequent to said reset pulse.

摘要翻译： 一种液晶显示装置，具有显示部，其中一组扫描电极和一组信号电极以矩阵形状排列，并且在电场方向上具有双稳态的铁电液晶被填充在所述 电极组并显示图像或信息，包括：用于通过脉冲在扫描线上从具有高阈值的像素顺序地写入灰度信息以将所选择的扫描电极上的所有像素完全复位为第一稳定状态的装置和一个 或在所述复位脉冲之后的多个脉冲。

公开(公告)号：EP0448105A2

公开(公告)日：1991-09-25

申请号：EP91104461.8

申请日：1991-03-21

申请人： CANON KABUSHIKI KAISHA

发明人： Kaneko, Shuzo, Canon Kabushiki Kaisha ,  Yoshida, Akio, Canon Kabushiki Kaisha ,  Fujiwara, Ryoji, Canon Kabushiki Kaisha

IPC分类号： G09G3/36

CPC分类号： G09G3/3651 ,  G09G3/2011 ,  G09G3/207 ,  G09G2310/061 ,  G09G2310/065

摘要： A method of driving an active matrix liquid crystal device, in which pixels of a liquid crystal display device having a memory performance are sequentially driven by an active matrix device, wherein
   after a recording signal voltage to determine an optical state of a liquid crystal of the pixel was applied every pixel, a grounding signal is applied with an elapse of a predetermined time.

摘要翻译： 一种驱动有源矩阵液晶装置的方法，其中具有存储性能的液晶显示装置的像素由有源矩阵装置顺序地驱动，其中在记录信号电压以确定液晶的光学状态之后， 每个像素施加像素，经过预定时间后施加接地信号。

公开(公告)号：EP0324997A1

公开(公告)日：1989-07-26

申请号：EP88202890.5

申请日：1988-12-15

申请人： Philips Electronics N.V.

发明人： Hartmann, Wilbert Jozef Antoon Marie

IPC分类号： H04N3/12 ,  G09G3/36

CPC分类号： H04N3/127 ,  G09G3/2011 ,  G09G3/207 ,  G09G3/3651 ,  G09G2310/0251 ,  G09G2310/061

摘要： In the case of active drive of a ferro-electric liquid crystal display device the picture elements within the line selection period are first brought to an extreme state by means of a "blanking" signal. To obtain grey scales in a reproducible manner ( via charge compensation) the data signal is preferably presented during a period which is short with respect to the switching period of the ferro-­electric liquid crystal.

摘要翻译： 在铁电液晶显示装置的有源驱动的情况下，通过“消隐”信号，首先将线路选择期间内的图像元素变为极端状态。 为了以可再现的方式（通过电荷补偿）获得灰度级，数据信号优选地在相对于铁电液晶的开关周期短的时段中呈现。

公开(公告)号：EP0224243A2

公开(公告)日：1987-06-03

申请号：EP86116359.0

申请日：1986-11-25

申请人： CANON KABUSHIKI KAISHA

发明人： Mouri, Akihiro ,  Kitayama, Hiroyuki ,  Kaneko, Shuzo ,  Takahashi, Tohru ,  Enari, Masahiko ,  Kuno, Mitsutoshi ,  Toyono, Tsutomu

IPC分类号： G09G3/36

CPC分类号： H04N3/127 ,  G02F1/141 ,  G02F2203/30 ,  G09G3/2011 ,  G09G3/2014 ,  G09G3/207 ,  G09G3/3637 ,  Y10S359/90

摘要： An optical modulation device comprises a first substrate having thereon a first conductor film, a second substrate having thereon a second conductor film disposed opposite to the first conductor film, and an optical modulation material disposed between the first and second substrates. The optical modulation device is driven by forming a potential gradient along the extension of the first conductor film or both the first and second conductor films, and applying an information signal to the first or second conductor film.