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    • 1. 发明授权
    • Optical scanning apparatus
    • 光学扫描装置
    • US5982524A
    • 1999-11-09
    • US924699
    • 1997-09-05
    • Osamu FujimotoHideo MatsudaYoichi ShimazawaKazuyuki OhnishiHidekazu Sakagami
    • Osamu FujimotoHideo MatsudaYoichi ShimazawaKazuyuki OhnishiHidekazu Sakagami
    • G02B26/10G02B26/12H04N1/113G02B26/08G02B5/10
    • G02B26/126
    • The present invention is intended to reduce a f.theta. correction error by correcting an error of an object scanning speed which is produced because a reflecting point of a laser beam moves on a polygon mirror. In an inventive laser scanner, laser light emitted from a laser oscillator is condensed into a beam by a condenser lens at first. This laser beam is reflected by a polygon mirror rotated by a scanning section and is reflected again to a photoreceptor by a curved reflecting mirror. A curved profile of a reflecting plane of the curved reflecting mirror in the main scanning direction is formed so as to be asymmetrical on right and left bounding about a scanning center point. Thereby, variation of speed for scanning the curved reflecting mirror by the light reflected by the polygon mirror may be canceled by the curved reflecting mirror and a speed for scanning the object may be fixed almost at a predetermined speed.
    • 本发明旨在通过校正由于激光束的反射点在多面镜上移动而产生的物体扫描速度的误差来减小fθ校正误差。 在本发明的激光扫描仪中,首先从聚光透镜将从激光振荡器发射的激光聚光成束。 该激光束由被扫描部旋转的多面体镜反射,并被弯曲的反射镜再次反射到感光体。 在主扫描方向上的弯曲反射镜的反射面的弯曲轮廓形成为围绕扫描中心点的左右边界不对称。 由此,由多面镜反射的光来扫描弯曲反射镜的速度变化可能被弯曲的反射镜消除,并且用于扫描物体的速度可以几乎以预定速度固定。
    • 2. 发明授权
    • Image formation apparatus and image formation method
    • 图像形成装置和图像形成方法
    • US06240271B1
    • 2001-05-29
    • US09238150
    • 1999-01-28
    • Yoichi ShimazawaHideo MatsudaYasutaka MaedaShunju AnzaiOsamu FujimotoHidekazu SakagamiKazumi Irie
    • Yoichi ShimazawaHideo MatsudaYasutaka MaedaShunju AnzaiOsamu FujimotoHidekazu SakagamiKazumi Irie
    • G03G1501
    • G06K15/129G03G15/0184G03G2215/0106
    • Developing devices are provided adjacent to a light sensitive element. An intermediate transfer drum is provided adjacent to the light sensitive elements. After exposure of the light sensitive element, a first color or third color image is formed on the light sensitive element. On the other hand, after exposure of the light sensitive element, a second color or fourth color image can be formed on the light sensitive element. The first color image is transferred from the transfer unit to the intermediate transfer drum at the first transfer portion, and the second color image is transferred from the transfer unit at the second transfer portion so as to be superimposed on the first color image. Similarly, the third color image is transferred so as to be superimposed on the second image and the fourth color image is transferred so as to be superimposed on the third color image to the intermediate transfer drum. Accordingly, the first to fourth color images are superimposed. Thereby, downsizing of the device and cost reduction are achieved and image formation speed is facilitated.
    • 显影装置设置在与光敏元件相邻的位置。 中间转印鼓设置成与光敏元件相邻。 在感光元件曝光之后,在感光元件上形成第一彩色或第三彩色图像。 另一方面,在感光元件曝光之后,可以在光敏元件上形成第二彩色或第四彩色图像。 第一彩色图像在第一转印部分从转印单元转印到中间转印鼓,并且第二彩色图像在第二转印部分从转印单元转印以便叠加在第一彩色图像上。 类似地,第三彩色图像被转印以叠加在第二图像上,并且第四彩色图像被转印以便叠加在第三彩色图像上至中间转印鼓。 因此,叠加第一至第四彩色图像。 从而,实现了装置的小型化和成本降低,并且促进了图像形成速度。
    • 3. 发明授权
    • Image formation apparatus and image formation method
    • 图像形成装置和图像形成方法
    • US5915074A
    • 1999-06-22
    • US856321
    • 1997-05-14
    • Yoichi ShimazawaHideo MatsudaYasutaka MaedaShunju AnzaiOsamu FujimotoHidekazu SakagamiKazumi Irie
    • Yoichi ShimazawaHideo MatsudaYasutaka MaedaShunju AnzaiOsamu FujimotoHidekazu SakagamiKazumi Irie
    • G03G15/00G03G15/01G03G15/16G06K15/12H04N1/23G06K15/00
    • G06K15/129G03G15/0184G03G2215/0106
    • Developing devices are provided adjacent to a light sensitive element. An intermediate transfer drum is provided adjacent to the light sensitive elements. After exposure of the light sensitive element, a first color or third color image is formed on the light sensitive element. On the other hand, after exposure of the light sensitive element, a second color or fourth color image can be formed on the light sensitive element. The first color image is transferred from the transfer unit to the intermediate transfer drum at the first transfer portion, and the second color image is transferred from the transfer unit at the second transfer portion so as to be superimposed on the first color image. Similarly, the third color image is transferred so as to be superimposed on the second image and the fourth color image is transferred so as to be superimposed on the third color image to the intermediate transfer drum. Accordingly, the first to fourth color images are superimposed. Thereby, downsizing of the device and cost reduction are achieved and image formation speed is facilitated.
    • 显影装置设置在与光敏元件相邻的位置。 中间转印鼓设置成与光敏元件相邻。 在感光元件曝光之后,在感光元件上形成第一彩色或第三彩色图像。 另一方面,在感光元件曝光之后,可以在光敏元件上形成第二彩色或第四彩色图像。 第一彩色图像在第一转印部分从转印单元转印到中间转印鼓,并且第二彩色图像在第二转印部分从转印单元转印以便叠加在第一彩色图像上。 类似地,第三彩色图像被转印以叠加在第二图像上,并且第四彩色图像被转印以便叠加在第三彩色图像上至中间转印鼓。 因此,叠加第一至第四彩色图像。 从而,实现了装置的小型化和成本降低,并且促进了图像形成速度。
    • 7. 发明授权
    • Pattern image reader device and image stabilizer device incorporated in image forming apparatus
    • 图案图像读取装置和图像稳定装置
    • US06181356B2
    • 2001-01-30
    • US09110609
    • 1998-07-06
    • Kazuyuki OhnishiYoichi ShimazawaSyoichiro Yoshiura
    • Kazuyuki OhnishiYoichi ShimazawaSyoichiro Yoshiura
    • B41J2385
    • G03G15/5058G03G15/0194G03G2215/00042G03G2215/00059G03G2215/0119H04N1/00002H04N1/00015H04N1/00031H04N1/00045H04N1/00053H04N1/4078
    • An object of the present invention is to offer an image stabilizer device capable of effectively improving quality of images produced by an image forming apparatus of a type that changes the size of a basic pixel by controlling an irradiation time of write-in light, and to offer a pattern image reader device used for the purpose. A pattern image reader device 100 is constituted by a reader unit 2 that at least contains a semiconductor laser 3, converging lens 6, and photosensor 5 for reading the amount of reflected light, and the driving section 7 that contains a drive coil 7c for moving the reader unit 2 in the principal scanning direction, and can measure on the order of microns the size of a toner image formed on the surface of a transfer and transport belt 26 in the principal scanning direction by monitoring the output of the photosensor 5 while moving in the principal scanning direction under the control by the CPU 48. The CPU 48 thereafter corrects lookup tables 45a to 45d according to the dot diameter measured in the principal scanning direction.
    • 本发明的目的是提供一种能够有效地提高通过控制写入光的照射时间来改变基本像素的尺寸的图像形成装置产生的图像的质量的图像稳定装置,并且 提供用于此目的的图案读取器设备。 图案图像读取装置100由读取单元2构成,读取单元2至少包含半导体激光器3,会聚透镜6和用于读取反射光量的光电传感器5,驱动部7包含用于移动的驱动线圈7c 读取器单元2在主扫描方向上,并且可以通过在移动的同时监视光传感器5的输出来在主扫描方向上测量形成在传送带26的表面上的调色剂图像的尺寸的微米量级 在CPU48的控制下在主扫描方向上。然后,CPU48根据在主扫描方向上测量的点直径来校正查找表45a至45d。
    • 8. 发明授权
    • Image forming apparatus having an image-quality correction function
    • 具有图像质量校正功能的图像形成装置
    • US5477308A
    • 1995-12-19
    • US157929
    • 1993-11-24
    • Kazuyuki OhnishiYasutaka MaedaYoichi ShimazawaMihoko OkadaYuichi KazakiShin-ichirou OhhashiYoshie Iwakura
    • Kazuyuki OhnishiYasutaka MaedaYoichi ShimazawaMihoko OkadaYuichi KazakiShin-ichirou OhhashiYoshie Iwakura
    • G03G15/00H04N1/32
    • G03G15/50G03G15/5041H04N1/32561G03G2215/00042H04N2201/0081H04N2201/0082
    • An image forming apparatus is designed to compensate for voltage to be applied to an exposure lamp and a charger in accordance with changes in the density of a toner image formed on a photoreceptor that occur from its initial state to its final state after an image forming operation. More specifically, the density of a reference toner image is measured by a toner-density sensor. The amount of change in the density is measured beginning with its initial state by a subtracter, and the amount of compensation for the voltage required for obtaining the optimum image quality is found. By using these amounts of compensation as teaching data, learning is made as to the relationship between the amount of change in the density and the amount of compensation in a neurocomputer. Upon forming an image, the neurocomputer executes operations in accordance with the contents of the learning based on an inputted amount of change in density, and finds an appropriate amount of compensation. With this arrangement, it is possible to constantly obtain copied images having stable image quality, and to lower the cost of image forming apparatuses by reducing the number of parts used for the sensors or other devices.
    • 图像形成装置被设计为根据在成像操作之后从其初始状态发生到其最终状态的感光体上形成的调色剂图像的浓度的变化来补偿施加到曝光灯和充电器的电压 。 更具体地,通过调色剂浓度传感器测量参考调色剂图像的浓度。 通过减法器从其初始状态开始测量密度的变化量,并且找到获得最佳图像质量所需的电压的补偿量。 通过使用这些数量的补偿作为教学数据,就了解了神经计算机中密度变化量与补偿量之间的关系。 在形成图像时,神经计算机根据输入的密度变化量根据学习的内容执行操作,并且找到适当的补偿量。 通过这种布置,可以不断获得具有稳定图像质量的复制图像,并且通过减少用于传感器或其他装置的部件数量来降低图像形成装置的成本。