公开(公告)号：US5095376A

公开(公告)日：1992-03-10

申请号：US556580

申请日：1990-07-24

申请人： Takao Umeda ,  Tetsuya Nagata ,  Tatsuo Igawa

发明人： Takao Umeda ,  Tetsuya Nagata ,  Tatsuo Igawa

IPC分类号： G09G3/36 ,  B41J2/445 ,  B41J2/447 ,  G02F1/133 ,  G06K15/12

CPC分类号： G06K15/1252 ,  B41J2/4473

摘要： An apparatus and method for driving an optical printer having at least one liquid crystal optical switch including a ferroelectric liquid crystal layer interposed between a pair of substrates having electrodes on confronting surfaces thereof, the at least one liquid crystal switch being disposed between a light source and a photosensitive surface, a light transmission state of the at least one liquid crystal optical switch being controlled by application of a voltage signal to the at least one liquid crystal optical switch so as to control light transmission to the photosensitive surface. A first voltage signal is applied to the liquid crystal of at least one liquid crystal optical switch in a writing period in which the light transmission state is determined in accordance with a printing signal for printing. A second voltage signal having a DC component of one polarity is applied to the liquid crystal layer in a retention period. A third voltage signal having a DC component of an opposite polarity is applied to the liquid crystal layer in a reset period in which the at least one liquid crystal optical switch is placed in a light interrupting state, and a fourth voltage signal having a DC component of the one polarity is applied to the liquid crystal layer in a period other than an excluding period which is formed of the writing period, the retention period and the reset period.

摘要翻译： 一种用于驱动光学打印机的装置和方法，所述光学打印机具有至少一个液晶光学开关，所述液晶光学开关包括介于具有在其相对表面上的电极的一对基板之间的铁电液晶层，所述至少一个液晶开关设置在光源和 感光表面，通过向至少一个液晶光开关施加电压信号来控制至少一个液晶光开关的透光状态，以控制对感光表面的光透射。 在根据用于打印的打印信号确定光透射状态的写入周期中，对至少一个液晶光开关的液晶施加第一电压信号。 具有一个极性的DC分量的第二电压信号在保持期间被施加到液晶层。 具有相反极性的DC分量的第三电压信号在至少一个液晶光开关处于遮光状态的复位时段中被施加到液晶层，并且具有DC分量的第四电压信号 在由写入期间，保持期间和复位期间形成的排除期间以外的期间向液晶层施加一个极性。

公开(公告)号：US5373351A

公开(公告)日：1994-12-13

申请号：US917709

申请日：1992-07-16

申请人： Takao Umeda ,  Tetsuya Nagata ,  Yasuo Takuma ,  Tatsuo Igawa

发明人： Takao Umeda ,  Tetsuya Nagata ,  Yasuo Takuma ,  Tatsuo Igawa

IPC分类号： G03G15/00 ,  G03G15/08 ,  G03G15/16 ,  G03G21/00

CPC分类号： G03G15/5037 ,  G03G15/08 ,  G03G15/1655 ,  G03G15/5033

摘要： A parallel circuit of a capacitor and a varistor is connected between a ground and an aluminum cap of a photosensitive drum having a photoconductor sheet wound on a surface of an aluminum drum. The capacitor is charged by a charger. A developer roll connected to a bias voltage supply is provided with a retraction mechanism and is controlled so that the developer roll is separated from the drum mechanically upon start of operation of a recording apparatus until a potential of the cap is increased to a predetermined value and a developing agent layer does not come into contact with the cap. Alternatively to retraction of the developing roll, the developing roll may be stopped to control a height of bristle of developing agent or a bias voltage of the developer may be reversed.

摘要翻译： 电容器和变阻器的并联电路连接在具有缠绕在铝鼓的表面上的感光鼓的感光鼓的接地和铝盖之间。 电容器由充电器充电。 连接到偏置电压源的显影辊具有退回机构，并被控制，使得显影辊在记录装置的操作开始时机械地与鼓分离直到盖的电位增加到预定值，并且 显影剂层不与盖接触。 替代显影辊的缩回，可以停止显影辊以控制显影剂的刷毛的高度，或显影剂的偏压可以颠倒。

公开(公告)号：US5177531A

公开(公告)日：1993-01-05

申请号：US685195

申请日：1991-04-15

申请人： Toru Miyasaka ,  Takao Umeda ,  Tetsuya Nagata ,  Tatsuo Igawa

发明人： Toru Miyasaka ,  Takao Umeda ,  Tetsuya Nagata ,  Tatsuo Igawa

IPC分类号： G01R29/12 ,  G01R29/14 ,  G03G15/00 ,  G03G15/02 ,  G03G15/04 ,  G03G15/043 ,  G03G15/22 ,  G03G21/00

CPC分类号： G03G15/5037 ,  G01R29/14

摘要： An electrostatic recorder including an electrostatic latent image measuring instrument for measuring a state of an electrostatic latent image formed on a photosensitive substance, and executed a printing process until an electrostatic latent image formed on a surface of a photosensitive substance based on measured data is transferred onto a blank form as a visual image by a transfer device by adjusting control factors such as exposure, exposure time, electrostatic charge voltage, development bias, temperature and humidity. The electrostatic latent image measuring instrument is provided with distance sensors which, when a measuring electrode is disposed near to the photosensitive substance, maintains a constant distance therebetween. It is thus possible to measure an electrostatic latent image even if the photosensitive substance is eccentric. Furthermore, an arc between the measuring electrode and the photosensitive substance is prevented by utilizing a gas having a high arc starting voltage between the measuring electrode and the photosensitive substance of the electrostatic latent image measuring instrument.

公开(公告)号：US5559578A

公开(公告)日：1996-09-24

申请号：US175867

申请日：1993-12-30

申请人： Takao Umeda ,  Toru Miyasaka ,  Osamu Namikawa ,  Isamu Komatsu ,  Tetsuya Nagata ,  Yasuo Takuma ,  Tatsuo Igawa

发明人： Takao Umeda ,  Toru Miyasaka ,  Osamu Namikawa ,  Isamu Komatsu ,  Tetsuya Nagata ,  Yasuo Takuma ,  Tatsuo Igawa

IPC分类号： G03G15/00 ,  G03G15/02 ,  G03G15/08 ,  G03G15/16 ,  G03G21/00

CPC分类号： G03G15/5037 ,  G03G15/0266 ,  G03G15/08 ,  G03G15/1655 ,  G03G15/55 ,  G03G15/553 ,  G03G15/75 ,  G03G15/752

摘要： An electrostatic recording apparatus and a management system thereof wherein the recording apparatus includes a photoconductor drum having a cap provided at an opening of the drum and a photoconductor sheet wound on a portion of the drum other than the opening, with the photoconductor drum being rotated. The cap is electrified and a capacitor is provided between the cap and a terminal and charged through the cap to maintain the cap in an electrified state. A potential of the terminal is equal to a ground potential or a potential approximating the ground potential. Further, a controller is provided for discharging the electrified electric charge of the cap in response to a discharge instruction. A managing system may be provided for judging the state of the electrostatic recording apparatus.

摘要翻译： 一种静电记录装置及其管理系统，其中记录装置包括具有设置在鼓的开口处的盖的感光鼓和缠绕在除开口之外的滚筒的一部分上的感光鼓，使感光鼓旋转。 盖子通电，并且在盖子和端子之间提供电容器并通过盖子充电以将盖子保持在带电状态。 端子的电位等于接地电位或接近地电位的电位。 此外，提供控制器，用于响应于放电指令而对盖的带电电荷进行放电。 可以提供用于判断静电记录装置的状态的管理系统。

公开(公告)号：US4746196A

公开(公告)日：1988-05-24

申请号：US46171

申请日：1987-05-05

申请人： Takao Umeda ,  Tetsuya Nagata ,  Yuzuru Simazaki ,  Tatsuo Igawa ,  Yasuro Hori

发明人： Takao Umeda ,  Tetsuya Nagata ,  Yuzuru Simazaki ,  Tatsuo Igawa ,  Yasuro Hori

IPC分类号： G09G3/18 ,  G02F1/133 ,  G09G3/36 ,  G02F1/13 ,  G09G3/00

CPC分类号： G09G3/3629 ,  G09G3/3696 ,  G09G2310/06 ,  G09G2310/063 ,  Y10S359/90

摘要： A multiplexed driving method of an optical switching element employing ferroelectric liquid crystal with a negative dielectric anisotropy including signal electrodes and common signal electrodes arranged in matrix and a ferroelectric liquid crystal layer disposed therebetween so as to constitute pixels at the respective facing portions of the signal electrodes and the common signal electrodes comprising a step of applying a common writing signal voltage to one of the common signal electrode to select pixels to which information be written, simultaneously applying a common status holding AC signal voltage to the other common signal electrodes covering non-selected pixels and simultaneously applying one of two signal pulses with opposite polarities to the signal electrodes, whereby resultant information writing voltages formed in combination of the common writing signal voltage and the signal pulses, which are enough to determine the orientation of the ferroelectric liquid crystal molecules, are applied on the selected pixels and resultant AC status holding voltage formed in combination of the common status holding AC signal voltage and the signal pulses which determine the limited bias voltage for the resultant AC voltage are applied on the non-selected pixels.

摘要翻译： 采用具有负介电各向异性的铁电液晶的光开关元件的多路复用驱动方法，该介质各向异性包括以矩阵形式布置的信号电极和公共信号电极，以及设置在它们之间的铁电液晶层，以在信号电极的各个相对部分处构成像素 并且公共信号电极包括将公共写入信号电压施加到公共信号电极之一以选择要写入信息的像素的步骤，同时将保持AC信号电压的公共状态施加到覆盖未选择的其它公共信号电极 并且同时向信号电极施加具有相反极性的两个信号脉冲之一，由此产生的共同写入信号电压和信号脉冲组合的结果信息写入电压足以确定铁电液晶分子的取向 对所选择的像素进行施加，并且将合成的共同状态保持AC信号电压和确定用于所得AC电压的限制偏置电压的信号脉冲形成的合成AC状态保持电压施加在未选择的像素上。

公开(公告)号：US5252954A

公开(公告)日：1993-10-12

申请号：US492588

申请日：1990-03-13

申请人： Tetsuya Nagata ,  Takao Umeda ,  Tatsuo Igawa

发明人： Tetsuya Nagata ,  Takao Umeda ,  Tatsuo Igawa

IPC分类号： G09G3/18 ,  G02F1/13 ,  G02F1/133 ,  G09G3/36

CPC分类号： G09G3/3692 ,  G09G3/3629 ,  G09G2310/06 ,  G09G2310/063 ,  G09G2310/065 ,  G09G2320/041

摘要： A driving method is provided for an electrooptical device having scanning and signal electrodes arranged in a matrix with a plurality of picture elements formed in association with intersections of the electrodes. Voltages of high-frequency pulses are applied to both the scanning and signal electrodes, and a DC voltage pulse for setting the optical state of the electrooptical material is applied to the picture elements during a selected period for the scanning electrodes, while a high-frequency AC voltage for holding the previously set optical state of the electrooptical material is applied to the picture elements during a non-selected period for the scanning electrodes. A circuit is also provided for carrying out the method, and an electrooptical apparatus is provided employing the electrooptical device described above.

摘要翻译： 提供了一种电光装置的驱动方法，该电光装置具有排列成矩阵的扫描信号电极和与电极的交点相关联地形成的多个像素。 将高频脉冲的电压施加到扫描电极和信号电极，并且将用于设置电光材料的光学状态的DC电压脉冲在扫描电极的选定时段期间施加到像素，而高频 在扫描电极的非选择时段期间，将用于保持电光材料的先前设定的光学状态的AC电压施加到像素。 还提供了用于实施该方法的电路，并且使用上述电光装置提供电光装置。

公开(公告)号：US4783149A

公开(公告)日：1988-11-08

申请号：US916724

申请日：1986-10-08

申请人： Takao Umeda ,  Tetsuya Nagata ,  Yuzuru Simazaki ,  Tatsuo Igawa ,  Yasuro Hori

发明人： Takao Umeda ,  Tetsuya Nagata ,  Yuzuru Simazaki ,  Tatsuo Igawa ,  Yasuro Hori

IPC分类号： B41J2/445 ,  G02F1/133 ,  G02F1/1362 ,  G06K15/12 ,  G02F1/13

CPC分类号： G06K15/1252 ,  G02F1/13306 ,  G02F1/1362

摘要： The invention relates to a liquid crystal optical switch array in which optical switch elements are opened and closed by the time-sharing drive and to an optical printer using this optical switch array. The optical switch element comprises a ferroelectric liquid crystal having a relaxative memory effect, signal electrodes and scanning electrodes which sandwich the liquid crystal layer, and a resistor element which is formed between the scanning electrode and the liquid crystal. A line selection signal is sequentially supplied to the scanning electrodes, these scanning electrodes become substantially the open state when the selection signal is not supplied. When the scanning electrodes are open, the resistor element has a predetermined resistance value. When the selection signal is supplied to the scanning electrodes, the resistor element has a lower resistance value.

摘要翻译： 本发明涉及一种通过分时驱动将光开关元件打开和关闭的液晶光开关阵列以及使用该光开关阵列的光学打印机。 光开关元件包括具有松弛记忆效应的铁电液晶，夹着液晶层的信号电极和扫描电极，以及形成在扫描电极和液晶之间的电阻元件。 线选择信号被顺序提供给扫描电极，当不提供选择信号时，这些扫描电极变为基本上是打开状态。 当扫描电极打开时，电阻元件具有预定的电阻值。 当选择信号被提供给扫描电极时，电阻元件具有较低的电阻值。

公开(公告)号：US5321477A

公开(公告)日：1994-06-14

申请号：US952732

申请日：1992-11-24

申请人： Tetuya Nagata ,  Takao Umeda ,  Takao Takuma ,  Tatsuo Igawa ,  Masato Miwa

发明人： Tetuya Nagata ,  Takao Umeda ,  Takao Takuma ,  Tatsuo Igawa ,  Masato Miwa

IPC分类号： G03G15/16

CPC分类号： G03G15/1645 ,  G03G15/165

摘要： It has been discovered that a cause of a transfer member winding on an image carrier at the time of transfer is attributable to a discharge in a gap formed between a forward end of the image carrier and a transfer member transporter and is characterized in that the discharge in that gap is ineffectuated by being controlled. An image-forming apparatus capable of preventing not only the winding on the image carrier, but also the fouling of the forward end even when the transfer member is changed in size, is provided by controlling the discharge in the gap. The gap may be ineffectuated by being pressed physically using a guide, thereby preventing the discharge in the gap. As an alternative, the transfer charge amount is controlled in accordance with the position where the forward end of the image carrier passes the transfer element.

摘要翻译： PCT No.PCT / JP92 / 00452 Sec。 371日期：1992年11月24日 102（e）日期1992年11月24日PCT提交1992年4月10日PCT公布。 出版物WO92 / 18912 PCT 日期：1992年10月29日。已经发现，在转印时在图像载体上缠绕的转印构件的原因归因于在图像载体的前端和转印构件转运体之间形成的间隙中的放电 其特征在于，该间隙中的放电被控制而无效。 通过控制间隙中的放电，能够提供即使当转印部件尺寸改变时，不仅可以防止图像载体上的卷绕，而且防止前端的结垢的图像形成装置。 通过使用引导件物理地按压间隙可能无法实现间隙，从而防止间隙中的放电。 作为替代，转印电荷量根据图像载体的前端经过转印元件的位置被控制。

公开(公告)号：US4586790A

公开(公告)日：1986-05-06

申请号：US466488

申请日：1983-02-15

申请人： Takao Umeda ,  Takao Miyashita ,  Yuzuru Shimazaki ,  Tatsuo Igawa ,  Ken Sasaki ,  Shigeru Matsuyama

发明人： Takao Umeda ,  Takao Miyashita ,  Yuzuru Shimazaki ,  Tatsuo Igawa ,  Ken Sasaki ,  Shigeru Matsuyama

IPC分类号： G02B5/30 ,  G02F1/13 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1337 ,  G09F9/30

CPC分类号： G02F1/13363 ,  G02F1/133305 ,  G02F2001/133635 ,  G02F2413/04 ,  G02F2413/08

摘要： In a display panel consisting essentially of a pair of substrates whose opposed surfaces are equipped with transparent conductive layers and at least one of which consists of an organic polymer film, and of a display member interposed between said pair of substrates, the improvement wherein said organic polymer film is a uniaxially stretched polyester film.

摘要翻译： 在基本上由一对基板组成的显示面板中，其相对表面配备有透明导电层，并且其中至少一个由有机聚合物膜构成，并且介于所述一对基板之间的显示元件，其中所述有机物 聚合物膜是单轴拉伸聚酯膜。

公开(公告)号：US4769659A

公开(公告)日：1988-09-06

申请号：US10429

申请日：1987-02-03

申请人： Takao Umeda ,  Kazuya Ooishi ,  Tatsuo Igawa ,  Yasuro Hori

发明人： Takao Umeda ,  Kazuya Ooishi ,  Tatsuo Igawa ,  Yasuro Hori

IPC分类号： G09G3/18 ,  G02F1/01 ,  G02F1/13 ,  G02F1/133 ,  G06K15/12 ,  G01D15/14

CPC分类号： G06K15/1252 ,  G02F1/0121 ,  G02F1/13306 ,  Y10S359/90

摘要： A printer for printing a desired print pattern on print regions of a paper having non-print regions including a light source, a control device including a plurality of optical switch elements having opposed electrodes with a ferroelectric liquid crystal material being interposed therebetween, and a photosensitive drum to which transmission light of the optical switch elements is radiated for enabling printing the pattern on the paper. The control device applies a positive or negative voltage between the opposed electrodes of each of the plurality of optical switch element selectively during a first period so as to control the quantity of transmission light between the opposed electrodes, and effects a short-circuit by simultaneously applying a substantially zero voltage between the opposed electrodes of all of the plurality of optical switch elements during a second period so as to reduce the quantity of non-uniform existence of ions in the ferroelectric light crystal material between the opposed electrodes. The second period is a period provided before and/or after the first period and the second period being shorter than the first period with the second period corresponding to at least one of the non-print regions at leading and trailing end portions of the paper among the non-print regions of the paper.