公开(公告)号：US6028579A

公开(公告)日：2000-02-22

申请号：US871375

申请日：1997-06-09

申请人： Akira Tsuboyama ,  Kazunori Katakura ,  Jun Iba

发明人： Akira Tsuboyama ,  Kazunori Katakura ,  Jun Iba

IPC分类号： G09G3/36

CPC分类号： G09G3/3633 ,  G09G3/3629 ,  G09G2310/0205 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2320/0204 ,  G09G2320/0209 ,  G09G2330/021

摘要： A liquid crystal device of the type including a pair of substrates having thereon a group of scanning electrodes and a group of data electrodes, and a chiral smectic liquid crystal disposed between the substrates so as to form a pixel at each intersection of the scanning electrodes and the data electrodes, is driven by a driving method causing less crosstalk. The driving method includes the steps of sequentially applying a scanning selection signal to the scanning electrodes, and applying data signals to the data electrodes in synchronism with the scanning selection signal. The scanning selection signal includes a writing pulse having a pulse width .DELTA.T for determining an optical state of the chiral smectic liquid crystal in cooperation with a data signal. Each data signal includes a data pulse for determining an optical state of the chiral smectic liquid crystal in cooperation with the writing pulse. A plurality of data signals are each designed to have a waveform determined based on a combination of data applied to pixels on at least two consecutively selected scanning electrodes. At least one of said plurality of data signals include an auxiliary pulse having a pulse width shorter than .DELTA.T.

摘要翻译： 一种液晶显示装置，其特征在于，包括一对基板，具有一组扫描电极和一组数据电极，以及设置在基板之间的手性近晶液晶，以便在扫描电极和 数据电极由驱动方法驱动，导致串扰较少。 该驱动方法包括以下步骤：向扫描电极依次施加扫描选择信号，并与扫描选择信号同步地向数据电极施加数据信号。 扫描选择信号包括具有脉冲宽度DELTA T的写入脉冲，用于与数据信号协同确定手性近晶液晶的光学状态。 每个数据信号包括与写入脉冲一起确定手性近晶液晶的光学状态的数据脉冲。 多个数据信号被设计为具有基于施加到至少两个连续选择的扫描电极上的像素的数据的组合确定的波形。 所述多个数据信号中的至少一个包括具有短于DELTA T的脉冲宽度的辅助脉冲。

公开(公告)号：US5966111A

公开(公告)日：1999-10-12

申请号：US736246

申请日：1996-10-24

申请人： Nobuaki Koshoubu ,  Masao Tokunaga

发明人： Nobuaki Koshoubu ,  Masao Tokunaga

IPC分类号： G02F1/133 ,  G09G3/36

CPC分类号： G09G3/3692 ,  G09G3/3633 ,  G09G3/3681 ,  G09G2310/027 ,  G09G2310/0289 ,  G09G2310/061 ,  G09G2320/0204 ,  G09G2320/0247

摘要： Burning and flickering effects of a display screen in a matrix-type liquid crystal display device using an anti-ferroelectric liquid crystal medium are avoided by controlling the duration of the holding period to a certain length. A control circuit measures the cycle of the input of the picture signals to one picture frame, and the duration of the blanking period is controlled according to the result of the measurement in order to keep the duration of the holding period constant.

摘要翻译： 通过将持续时间的持续时间控制到一定长度来避免使用反铁电液晶介质的矩阵型液晶显示装置中的显示屏的燃烧和闪烁效果。 控制电路测量图像信号输入到一个图像帧的周期，并且根据测量结果来控制消隐周期的持续时间，以保持保持周期的持续时间恒定。

公开(公告)号：US5956010A

公开(公告)日：1999-09-21

申请号：US866112

申请日：1997-05-30

申请人： Yasufumi Asao ,  Yasuaki Takeda ,  Hirohide Munakata ,  Yukio Hanyu ,  Nobuhiro Ito

发明人： Yasufumi Asao ,  Yasuaki Takeda ,  Hirohide Munakata ,  Yukio Hanyu ,  Nobuhiro Ito

IPC分类号： G09G3/36

CPC分类号： G09G3/3633 ,  G09G3/3629 ,  G09G2310/06 ,  G09G2310/061

摘要： A liquid crystal apparatus is constituted by a liquid crystal device including a pair of substrates and a liquid crystal disposed between the substrates, and means for applying an asymmetrical drive signal waveform to the liquid crystal. The liquid crystal is capable of having at least two stable states S1 and S2 and capable of causing a cumulative translational movement depending on a change in an external electric field applied to the liquid crystal. To the liquid crystal, an asymmetrical drive signal waveform having an effective frequency range is applied by the above application means so as to provide an absolute value of a difference between an inversion frequency f.sub.01 where a direction of the movement of said liquid crystal is turned in an opposite direction in the state S1 and an inversion frequency f.sub.02 where a direction of the movement of said liquid crystal is turned in an opposite direction in the state S2 smaller than a difference therebetween in the case of applying a symmetrical drive signal waveform to said liquid crystal. The inversion frequencies f.sub.01 and f.sub.02 are within the effective frequency range of the asymmetrical drive signal waveform. The application means is effective in suppressing liquid crystal movement in the liquid crystal device.

摘要翻译： 液晶装置由包括一对基板和设置在基板之间的液晶的液晶装置构成，以及用于向液晶施加非对称驱动信号波形的装置。 液晶能够具有至少两个稳定状态S1和S2，并且能够根据施加到液晶的外部电场的变化而引起累积的平移运动。 对于液晶，通过上述施加装置施加具有有效频率范围的不对称驱动信号波形，以便提供转换所述液晶的移动方向的反转频率f01之间的差的绝对值 在状态S1中的相反方向和反转频率f02，其中在向对所述液体施加对称的驱动信号波形的情况下，在所述状态S2中，所述液晶的移动方向在相反方向转动， 水晶。 反转频率f01和f02在不对称驱动信号波形的有效频率范围内。 施加装置有效地抑制液晶装置中的液晶运动。

公开(公告)号：US5880706A

公开(公告)日：1999-03-09

申请号：US770153

申请日：1996-12-19

申请人： Koji Nakamura ,  Hirotaka Suzuki ,  Nobuaki Koshobu

发明人： Koji Nakamura ,  Hirotaka Suzuki ,  Nobuaki Koshobu

IPC分类号： G02F1/133 ,  G09G3/36

CPC分类号： G09G3/3692 ,  G09G3/3633 ,  G09G3/3681 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2320/0247

摘要： The present invention provides a liquid crystal display device having a matrix electrode structure in which flicker of picture images displayed on a panel is invisible. Scanning electrodes of the matrix are driven by alternating voltages which include voltages for holding picture images displayed on the panel. Refresh pulse voltages higher than the holding voltages are imposed on the scanning electrodes every time the polarity of the holding voltages is reversed, so that the brightness of the picture images does not change before and after the reversing of the holding voltage polarity. In case an anti-ferroelectric liquid crystal is used as the liquid crystal, the refresh pulse voltages which cause transitions of the liquid crystal states between positive ferroelectric and negative ferroelectric states and do not cause the transition from an anti-ferroelectric state to the ferroelectric states are imposed on the scanning electrodes.

摘要翻译： 本发明提供一种具有矩阵电极结构的液晶显示装置，其中显示在面板上的图像图像的闪烁是不可见的。 矩阵的扫描电极由包括用于保持显示在面板上的图像图像的电压的交流电压驱动。 每当保持电压的极性反转时，刷新高于保持电压的脉冲电压施加在扫描电极上，使得在保持电压极性反转之前和之后图像的亮度不变。 在使用反铁电液晶作为液晶的情况下，刷新脉冲电压导致正铁电和负铁电体状态之间的液晶态的转变，并且不引起从反铁电状态向铁电态的转变 施加在扫描电极上。

公开(公告)号：US5459481A

公开(公告)日：1995-10-17

申请号：US50241

申请日：1993-07-02

申请人： Takaaki Tanaka ,  Yuzuru Sato

发明人： Takaaki Tanaka ,  Yuzuru Sato

IPC分类号： G02F1/133 ,  G09G3/20 ,  G09G3/36

CPC分类号： G09G3/3633 ,  G09G2310/06 ,  G09G2310/061 ,  G09G3/2011

摘要： A time-sharing addressing method for an antiferroelectric phase liquid crystal element that demonstrates tristable switching behavior, wherein the drive voltage waveform is made an alternating current and the time average value of the voltage, including the depolarization field due to spontaneous polarization of the liquid crystal, actually applied to the liquid crystal substance in one frame or two frames is made zero for the purpose of expanding the drive voltage margin and the operating temperature margin of the element, shortening the screen scanning time and preventing degradation of the electro-optical characteristic by suppressing polarization of the electric charge due to spontaneous polarization of the liquid crystal. Also, by providing the blanking period required for relaxation from a ferroelectric phase to an antiferroelectric phase in the non-selection period, the time required for screen scanning is shortened, and by changing the length of the blanking period according to the temperature dependence of the response-relaxation time, the operating temperature margin is expanded.

摘要翻译： PCT No.PCT / JP92 / 00411 Sec。 371日期：1993年7月2日 102（e）日期1993年7月2日PCT 1992年4月3日提交PCT。一种反铁电相液晶元件的分时寻址方法，其表现出三重切换行为，其中驱动电压波形为交流电，时间 在一帧或两帧中实际施加到液晶物质的包括由于液晶的自发极化引起的去极化的电压的平均值为零，以扩大驱动电压余量和工作温度裕度 元件，通过抑制由于液晶的自发极化引起的电荷的偏振，缩短了屏幕扫描时间并防止了电光特性的劣化。 此外，通过在非选择期间中提供从铁电相放电到反铁电相所需的消隐期，屏幕扫描所需的时间缩短，并且通过根据温度依赖性改变消隐周期的长度 响应弛豫时间，工作温度裕度扩大。

公开(公告)号：US5108650A

公开(公告)日：1992-04-28

申请号：US594972

申请日：1990-10-10

申请人： Mitsuhiro Koden ,  Makoto Shiomi ,  Fumiaki Funada ,  Keizo Ito

发明人： Mitsuhiro Koden ,  Makoto Shiomi ,  Fumiaki Funada ,  Keizo Ito

IPC分类号： G02F1/1337 ,  C09K19/20 ,  C09K19/42 ,  C09K19/46 ,  G02F1/13 ,  G02F1/141 ,  G09G3/36

CPC分类号： C09K19/46 ,  G09G3/3633 ,  G02F2001/1412 ,  G09G2310/06 ,  G09G2320/0209

摘要： An antiferroelectric liquid crystal display device including a specific antiferroelectric liquid crystal composition layer comprising at least one compound represented by the following general formula (I): ##STR1## wherein R.sup.1 represents an optionally substituted alkyl or alkoxy group having 1 to 15 carbon atoms, R.sup.2 represents an optionally substituted alkyl group having 1 to 15 carbon atoms, X represents a hydrogen or fluorine atom, m and n independently represents an integer 1 or 2, and * represents an asymmetric carbon atom, and at least one compound represented by the following general formula (II): ##STR2## wherein R.sup.3 represents an optionally substituted alkyl or alkoxy group, having 1 to 15 carbon atoms, R.sup.4 represents an optionally substituted alkyl group, having 1 to 15 carbon atoms, ##STR3## X represents a single bond or --COO--, Y represents a single bond, --O--, or --COO--, and k represents an integer 0 or 1.

公开(公告)号：US5046823A

公开(公告)日：1991-09-10

申请号：US328363

申请日：1989-03-24

申请人： Kahoru Mori ,  Yuichiro Yamada ,  Norio Yamamoto ,  Masao Tokunaga ,  Ichiro Kawamura ,  Yoshiichi Suzuki ,  Takashi Hagiwara ,  Yoshihiko Aihara ,  Noriko Yamakawa ,  Shigenori Sakuma

发明人： Kahoru Mori ,  Yuichiro Yamada ,  Norio Yamamoto ,  Masao Tokunaga ,  Ichiro Kawamura ,  Yoshiichi Suzuki ,  Takashi Hagiwara ,  Yoshihiko Aihara ,  Noriko Yamakawa ,  Shigenori Sakuma

IPC分类号： C09K19/20 ,  G02F1/141 ,  G09G3/36

CPC分类号： C09K19/2028 ,  C09K19/2021 ,  G02F1/141 ,  G09G3/3633 ,  G09G3/3681 ,  G09G3/3692 ,  G09G2310/06 ,  G09G2310/061

摘要： There is disclosed herein a ferroelectric liquid crystal electro-optical apparatus of the maxtrix type comprising a liquid crystal cell having first and second electrode substrates which include n striped line electrodes and m striped column electrodes, respectively, facing at right angles each other. A ferroelectric liquid crystal is put in therebetween so as to form n by m indication picture elements. Also included in the apparatus a scanning drive device adapted to supply a scanning signal and a data signal to the n striped line electrodes and the m striped column electrodes, respectively. The ferroelectric liquid crystal shows three stable states in accordance with an application voltage and has a light transmittance with a hysteresis sufficient to a dynamic drive in accordance with increase or decrease in the application voltage in a predetermined voltage range. The scanning drive device produces a first combination signal as a signal running to variation from a voltage below a refernece voltage in a predetermined one polarity voltage range to a voltage above the reference voltage and produces a second combination signal as a signal which does not exceed the reference voltage in the range, and supplies a direct-current combination signal between the electrodes after the supply of the first and second combination signal thereto.