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    • 12. 发明授权
    • Image forming apparatus and image forming method
    • 图像形成装置及图像形成方法
    • US09310722B2
    • 2016-04-12
    • US14005770
    • 2012-03-16
    • Shinya TanakaNaomi SugimotoHaruo IimuraShinji AokiYasuhiko OginoKazuchika SaekiKeigo Nakamura
    • Shinya TanakaNaomi SugimotoHaruo IimuraShinji AokiYasuhiko OginoKazuchika SaekiKeigo Nakamura
    • G03G15/16G03G15/01
    • G03G15/1675G03G15/0131G03G15/0189G03G15/1665G03G15/80
    • [Problem to be solved] To provide an image forming apparatus for suppressing formations of white spots and achieving high quality images, while obtaining sufficient image densities in both of the recessed parts and the projected parts of a recording medium surface.[Solution] An image forming apparatus includes a transfer member 36 that abuts against a surface of an image carrier carrying a toner image and forms a transfer nip, and a power supply 39 that outputs a voltage (transfer bias) for causing the toner image on the image carrier to be transferred onto a recording medium P nipped in the transfer nip. The voltage is switched alternatingly between a transfer direction voltage for causing the toner image to be transferred from the image carrier onto the recording medium and a voltage having an opposite polarity of the transfer direction voltage when the toner image on the image carrier is to be transferred onto the recording medium. A time-averaged value (Vave) of the voltage is set to a transfer direction polarity that causes the toner image to be transferred from the image carrier onto the recording medium, and is set more in the transfer direction than a median voltage (Voff) between a maximum and a minimum of the voltage.
    • [待解决的问题]提供一种用于抑制白点的形成并实现高质量图像的图像形成装置,同时在记录介质表面的凹陷部分和投影部分中获得足够的图像密度。 图像形成装置包括:转印构件36,其抵靠承载调色剂图像的图像载体的表面并形成转印压区;以及电源39,其输出用于使调色剂图像打开的电压(转印偏压) 要传送到夹持在转印辊隙中的记录介质P上的图像载体。 电压在用于使调色剂图像从图像载体转印到记录介质上的转印方向电压和当图像载体上的调色剂图像将被转印时具有与转印方向电压相反的极性的电压交替切换 到记录介质上。 将电压的时间平均值(Vave)设定为使得调色剂图像从图像载体转印到记录介质上的转印方向极性,并且在转印方向上设定为比中值电压(Voff)更大, 在最大和最小的电压之间。
    • 14. 发明授权
    • Image forming apparatus for obtaining good image quality over time
    • 用于随时间获得良好图像质量的图像形成装置
    • US08750736B2
    • 2014-06-10
    • US13415077
    • 2012-03-08
    • Keigo NakamuraHaruo IimuraYasuhiko OginoShinji Aoki
    • Keigo NakamuraHaruo IimuraYasuhiko OginoShinji Aoki
    • G03G15/16
    • G03G15/1675
    • An image forming apparatus includes an image carrying member to carry a toner image, a nip forming member to form a transfer nip with the image carrying member, and a transfer bias outputting unit to output a transfer bias to transfer the toner image from the image carrying member to a recording medium. The transfer bias is composed of a direct current (DC) component and an alternating current (AC) component, and a least one of the DC component and the AC component is subjected to constant voltage control. When constant current control is conducted at a timing other than when the toner image is being transferred from the image carrying member to the recording medium, a detection bias voltage at the transfer nip is detected, and the voltage of at least one of the DC component and the AC component is controlled based on the detected detection bias voltage.
    • 图像形成装置包括:承载构件以承载调色剂图像,夹持形成构件以与图像承载构件形成转印压区;以及转印偏压输出单元,用于输出转印偏压以从承载图像的图像转印调色剂图像 成员到记录介质。 转移偏压由直流(DC)分量和交流(AC)分量组成,直流分量和交流分量中的至少一个进行恒压控制。 当在除了从图像承载构件向记录介质传送调色剂图像之外的定时进行恒定电流控制时,检测转印间隙处的检测偏压,并且至少一个DC分量 并且基于检测到的检测偏压来控制AC分量。
    • 15. 发明申请
    • IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD CAPABLE OF GENERATING STABLE TRANSFER ELECTRIC FIELD
    • 能够生成稳定的传输电场的图像形成装置和图像形成方法
    • US20090123168A1
    • 2009-05-14
    • US12267677
    • 2008-11-10
    • Shinji AokiHaruo Iimura
    • Shinji AokiHaruo Iimura
    • G03G15/16G03G13/16
    • G03G15/1675G03G2215/0129G03G2215/1614
    • An image forming apparatus includes an image carrier for carrying a toner image and a transfer device. In the transfer device, a voltage applier applies a predetermined voltage to a transfer electric field generator. A potential measurement device measures a surface potential of the transfer electric field generator when a predetermined time period elapses after the voltage applier applies the predetermined voltage to the transfer electric field generator. A controller determines a transfer bias to be applied by at least one transfer member to the transfer electric field generator based on the measured surface potential of the transfer electric field generator. The at least one transfer member applies the transfer bias to the transfer electric field generator to generate a transfer electric field. The toner image is transferred from the image carrier onto a toner image receiver by the transfer electric field generated by the transfer electric field generator.
    • 图像形成装置包括用于承载调色剂图像的图像载体和转印装置。 在转印装置中,电压施加器将预定电压施加到转印电场发生器。 电压测量装置在电压施加器将预定电压施加到转印电场发生器之后经过预定时间段时测量转印电场发生器的表面电位。 控制器基于所测量的转移电场发生器的表面电位,确定由至少一个转移元件施加到转印电场发生器的转印偏压。 所述至少一个转印部件将转印偏压施加到转印电场发生器以产生转印电场。 调色剂图像通过由转印电场发生器产生的转印电场从图像载体转印到调色剂图像接收器上。
    • 16. 发明授权
    • Liquid crystal display device with a birefringent compensator
    • 具有双折射补偿器的液晶显示装置
    • US5016988A
    • 1991-05-21
    • US475214
    • 1990-02-05
    • Haruo Iimura
    • Haruo Iimura
    • G02F1/133G02F1/13363G02F1/139
    • G02F1/133634G02F1/1397
    • Disclosed herein is a liquid crystal display device comprising (1) a liquid crystal cell having a structure in which liquid crystal molecules in the liquid crystal layer sandwiched between substrates are oriented substantially in parallel to the surface of the substrate and twisted at an angle of from 120.degree. to 360.degree. in the thickness direction of the liquid crystal layer when the voltage is not applied, (2) a pair of polarizers disposed so as to sandwich the liquid crystal cell therebetween and (3) a birefringence layer disposed between the liquid crystal layer and at least one of the polarizers. The liquid crystal display device can provide black and white display of excellent visual angle characteristic and of excellent quality. Furthermore, the maximum, minimum, and perpendicular refractive indexes, n.sub.x, n.sub.y, and n.sub.z, respectively, of the birefringence layer satisfy the following relationship:n.sub.y
    • 本发明公开了一种液晶显示装置,其特征在于,具备:(1)液晶单元,其具有以下结构:液晶层中夹在基板之间的液晶分子大致平行于基板的表面取向,并以 不施加电压时液晶层的厚度方向为120°〜360°,(2)设置在其间夹着液晶单元的一对偏振片,(3)配置在液晶层之间的双折射层 层和至少一个偏振器。 液晶显示装置可以提供优异的视角特性和优良品质的黑白显示。 此外,双折射层的最大,最小和垂直折射率nx,ny和nz分别满足以下关系:ny
    • 17. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US09020382B2
    • 2015-04-28
    • US13690408
    • 2012-11-30
    • Shinji AokiHaruo IimuraYasuhiko OginoTadashi KasaiNaomi SugimotoShinya TanakaKeigo Nakamura
    • Shinji AokiHaruo IimuraYasuhiko OginoTadashi KasaiNaomi SugimotoShinya TanakaKeigo Nakamura
    • G03G15/16G03G15/01
    • G03G15/0131G03G15/0189G03G15/1675G03G2215/0129
    • An image forming apparatus includes a nip forming member and a transfer bias output device that outputs a transfer bias to form a transfer electric field in a transfer nip between the nip forming member and an intermediate transfer member. Upon transfer of a composite toner image including a particular toner image onto a recording medium in the transfer nip, the transfer bias output device outputs the transfer bias including a first superimposed bias in which a direct current (DC) component is superimposed on an alternating current (AC) component. Upon transfer of the composite toner image without the particular toner image onto the recording medium in the transfer nip, the transfer bias output device outputs one of the transfer bias including a second superimposed bias having a peak-to-peak value of the AC component smaller than that of the first superimposed bias and the transfer bias including only the DC component.
    • 图像形成装置包括辊隙形成构件和转印偏压输出装置,其输送转印偏压以在辊隙形成构件和中间转印构件之间的转印辊隙中形成转印电场。 在将包括特定调色剂图像的复合调色剂图像转印到转印辊隙中的记录介质上时,转印偏压输出装置输出包括其中直流(DC)分量叠加在交流电上的第一重叠偏压的转印偏压 (AC)组件。 在转印偏压输出装置将没有特定调色剂图像的复合调色剂图像转印到记录介质上时,转印偏压输出装置输出包括具有AC分量的峰 - 峰值的第二叠加偏置的转印偏压中的一个较小 比第一重叠偏置和仅包括直流分量的转印偏压的偏置。
    • 18. 发明授权
    • Transfer device and image forming apparatus incorporating same
    • 转印装置和包含其的图像形成装置
    • US08781348B2
    • 2014-07-15
    • US13206957
    • 2011-08-10
    • Yasuhiko OginoHaruo IimuraShinji AokiKeigo Nakamura
    • Yasuhiko OginoHaruo IimuraShinji AokiKeigo Nakamura
    • G03G15/16
    • G03G15/1675G03G15/1605
    • A transfer device includes a controller that controls a transfer bias supply to cause a transfer bias to increase, between an image carrier and a first rotary body disposed opposite the image carrier, a potential of the first rotary body toward an opposite polarity to a charge polarity of toner of a toner image on the image carrier to be higher than a potential of the image carrier, and to change, on the basis of identified recording medium type, a returning peak value which is one of a peak value of positive polarity and a peak value of negative polarity of the transfer bias and which generates an electric field that causes the toner having moved to the recording medium from the image carrier to return to the image carrier from the recording medium in a transfer nip.
    • 传送装置包括控制器,其控制转印偏压供应,以使图像载体和与图像载体相对设置的第一旋转体之间的转印偏压增大,第一旋转体的电位朝向与极性相反的极性 使得图像载体上的调色剂图像的调色剂高于图像载体的电位,并且基于所识别的记录介质类型改变作为正极性峰值的返回峰值和 转印偏压的负极性的峰值,并且产生使得调色剂从图像载体移动到记录介质的电场,从而在转印辊隙中从记录介质返回到图像载体。
    • 20. 发明授权
    • Image forming apparatus and image forming method
    • 图像形成装置及图像形成方法
    • US07662530B2
    • 2010-02-16
    • US11425887
    • 2006-06-22
    • Haruo Iimura
    • Haruo Iimura
    • G03G9/00G03G13/16
    • G03G15/16G03G9/0819G03G9/0823G03G9/0827G03G9/0904G03G9/09716G03G2215/0119
    • Provided is an image forming apparatus containing a latent electrostatic image bearing member, a latent electrostatic image forming unit configured to form a latent electrostatic image on the latent electrostatic image bearing member, a developing unit configured to develop the latent electrostatic image using a toner to form a toner image, and a transferring unit configured to transfer the toner image on a recording medium, wherein a surface of the toner is coated with an external additive containing fine particles having an average particle diameter Da of 100 nm to 300 nm, and a value obtained by dividing an average F of non-electrostatic adhesion between the toner and the latent electrostatic image bearing member by a product of volume average particle diameter of the toner Dt and average particle diameter of the external additive Da, [F/(Dt×Da)] is 7.5×104 N/m2 or less.
    • 本发明提供一种包含静电潜像承载部件,静电潜像形成单元,其构造成在静电潜像承载部件上形成静电潜像的图像形成装置,配置为使用调色剂显影静电潜像的显影单元, 调色剂图像和被配置为将调色剂图像转印在记录介质上的转印单元,其中调色剂的表面涂覆有包含平均粒径Da为100nm至300nm的细颗粒的外部添加剂, 通过将调色剂和静电潜像承载部件之间的非静电粘合的平均F除以调色剂Dt的体积平均粒径和外部添加剂Da的平均粒径的乘积[F /(Dt×Da)] 为7.5×10 4 N / m 2以下。