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    Exposure apparatus for image formation and image formation method
    1.
    发明授权
    Exposure apparatus for image formation and image formation method 失效
    用于图像形成和图像形成方法的曝光装置

    公开(公告)号：US6433803B2

    公开(公告)日：2002-08-13

    申请号：US82619901

    申请日：2001-04-04

    Applicant: SHARP KK

    Inventor： MUTOU YOSHINORI ,  TOYOSHIMA TETSURO ,  IWAMATSU TADASHI ,  AZUMA NOBUYUKI ,  NAKAJIMA YOSHINORI

    IPC: B41J2/44 ,  G03G15/04 ,  H04N1/29 ,  H04N1/40 ,  B41J2/385 ,  G03G13/04

    CPC classification number: H04N1/40043 ,  H04N1/40037

    Abstract: An exposure apparatus for image formation uses power control means provided to a laser driver for controlling exposure energy and accordingly forming an image. Specifically, exposure energy is varied depending on an isolated-dot pattern and an isolated-line pattern by changing the pulse height (drive power) of a drive pulse for each dot. Both of the isolated-line and isolated-dot patterns of a high resolution can thus be reproduced with a high image quality without increase of cost due to requirements for accuracy in processing and positioning of a lens and without decrease of life of a photoreceptor due to a decreased thickness of its photosensitive layer.

    Abstract translation: 用于图像形成的曝光装置使用提供给激光驱动器的功率控制装置来控制曝光能量并因此形成图像。 具体地，通过改变每个点的驱动脉冲的脉冲高度（驱动功率），曝光能量根据孤立点图形和隔离线图案而变化。 因此，由于对透镜的加工和定位的精度的要求以及由于感光体的寿命的降低而导致的高分辨率的孤立线和孤立点图案，因此可以以高图像质量再现高成像质量而不增加成本 其感光层的厚度减小。

    2.
    发明专利
    未知

    公开(公告)号：DE69332214T2

    公开(公告)日：2003-04-24

    申请号：DE69332214

    申请日：1993-06-29

    Applicant: SHARP KK

    Inventor： TOYOSHIMA TETSURO ,  UEDA TETSUYUKI ,  INOUE ATSUSHI ,  KAMIMURA TAISUKE ,  FUJITA HIDEAKI ,  YAMANAKA TAKAYUKI

    IPC: G03G15/06 ,  G03G15/08

    Abstract: The present invention relates to a developing device for developing, by using a developer (13, 16; 27, 107), a latent image formed on a surface of an image data forming member (7; 21; 101), comprising: a developer accommodating section (14; 26; 103) for accommodating the developer; a developer retaining member (2; 23; 102) for receiving the developer from the developer accommodating section (14; 26; 103) and transporting the developer to the latent image formed on the image data forming member (7; 21; 101); an electrode (4; 24; 104) provided at a position which is downstream from the developer accommodating section (14; 26; 103) and upstream from the image data forming member (7; 21; 101) in a direction in which the developer is transported, the electrode (4; 24; 104) being opposed to the developer retaining member (2; 23; 102); and voltage applying means (10; 25; 105, 106) for applying a DC voltage between the electrode (4; 24; 104) and the developer retaining member (2; 23; 102) so that the electric sign of the electrode (4; 24; 104) be identical to that of the toner charge.

    3.
    发明专利
    未知

    公开(公告)号：DE69305889T2

    公开(公告)日：1997-04-10

    申请号：DE69305889

    申请日：1993-03-05

    Applicant: SHARP KK

    Inventor： IWAMATSU TADASHI ,  TOYOSHIMA TETSURO

    IPC: G02B26/10

    Abstract: A holographic scanner for scanning a surface (9) with a light beam (14) is provided. The holographic scanner includes a light source (16) for emitting light used as the light beam, a front hologram (2) for diffracting the light (10) emitted from the light source to produce a first diffracted beam (12), a rotary hologram disk (11) having a disk plane and rotatable around an axis thereof vertical to the disk plane, the rotary hologram disk including a plurality (6) of scanning holograms arranged on the disk plane in a circumferential direction, the scanning holograms diffracting the first diffracted beam (12) to produce a second diffracted beam (13), and a rear hologram (3) for diffracting the second diffracted beam to produce a third diffracted beam (14), the third diffracted beam being used as the light beam for illuminating the scanning plane.

    4.
    发明专利
    未知

    公开(公告)号：DE69816741T2

    公开(公告)日：2004-04-15

    申请号：DE69816741

    申请日：1998-10-15

    Applicant: SHARP KK

    Inventor： TATSUMI HIROSHI ,  TOYOSHIMA TETSURO ,  SAKAI TAKASHI

    IPC: G03G15/06 ,  G03G15/00 ,  G03G15/08 ,  G03G15/09

    Abstract: A switching element (5) and a protective resistance (6) are connected between a developing roller (1) and a developing bias source (7), which switching element (5) switches on and off a connection between the developing roller (1) and the developing bias source (7), and which protective resistance (6) is connected to the switching element (5) in series. Controlling means and bias stabilizing means are provided, which controlling means switches on the switching element (5) when a developing bias voltage is to be applied to the developing roller (1) and switches off the switching element (5) when the developing roller (1) is caused to be in an electrically floating state without applying the developing bias voltage, and which bias stabilizing means (4) is disposed between the developing roller (1) and a ground and maintains a predetermined stable voltage only when the switching element (5) is switched on. Accordingly, a high-quality image can be formed with a low power consumption.

    5.
    发明专利
    未知

    公开(公告)号：DE69718602D1

    公开(公告)日：2003-02-27

    申请号：DE69718602

    申请日：1997-10-29

    Applicant: SHARP KK

    Inventor： TOYOSHIMA TETSURO ,  AZUMA NOBUYUKI ,  YAMANAKA TAKAYUKI

    IPC: G03G15/08

    Abstract: A developing device has a development roller for carrying toner on a surface thereof, a toner supply roller for supplying the toner to the development roller, a flat spring which comes into contact with the development roller, charges the toner to be supplied to the development roller and applies the toner to the development roller while regulating the thickness of a layer of the toner. The flat spring has a plurality of flat-plate parts including a contact flat-plate part which comes into contact with the development roller, and a curved part which connects the flat-plate parts to each other. In this structure, by arbitrarily selecting dimensional parameters of the flat spring, it is possible to easily obtain various flat springs having different properties. Therefore, for example, the stress to the toner and the stress to the members can be easily reduced simultaneously with a design of the flat spring. Moreover, it is possible to improve the uniformity of the toner layer thickness in the axis direction of the development roller and the uniformity of charging of the toner.

    7.
    发明专利
    未知

    公开(公告)号：DE69320882D1

    公开(公告)日：1998-10-15

    申请号：DE69320882

    申请日：1993-06-29

    Applicant: SHARP KK

    Inventor： TOYOSHIMA TETSURO ,  UEDA TETSUYUKI ,  INOUE ATSUSHI ,  KAMIMURA TAISUKE ,  FUJITA HIDEAKI ,  YAMANAKA TAKAYUKI

    IPC: G03G15/06 ,  G03G15/08

    Abstract: The present invention relates to a developing device for developing, by using a developer (13, 16; 27, 107), a latent image formed on a surface of an image data forming member (7; 21; 101), comprising: a developer accommodating section (14; 26; 103) for accommodating the developer; a developer retaining member (2; 23; 102) for receiving the developer from the developer accommodating section (14; 26; 103) and transporting the developer to the latent image formed on the image data forming member (7; 21; 101); an electrode (4; 24; 104) provided at a position which is downstream from the developer accommodating section (14; 26; 103) and upstream from the image data forming member (7; 21; 101) in a direction in which the developer is transported, the electrode (4; 24; 104) being opposed to the developer retaining member (2; 23; 102); and voltage applying means (10; 25; 105, 106) for applying a DC voltage between the electrode (4; 24; 104) and the developer retaining member (2; 23; 102) so that the electric sign of the electrode (4; 24; 104) be identical to that of the toner charge.

    9.
    发明专利
    未知

    公开(公告)号：DE69816741D1

    公开(公告)日：2003-09-04

    申请号：DE69816741

    申请日：1998-10-15

    Applicant: SHARP KK

    Inventor： TATSUMI HIROSHI ,  TOYOSHIMA TETSURO ,  SAKAI TAKASHI

    IPC: G03G15/06 ,  G03G15/00 ,  G03G15/08 ,  G03G15/09

    Abstract: A switching element (5) and a protective resistance (6) are connected between a developing roller (1) and a developing bias source (7), which switching element (5) switches on and off a connection between the developing roller (1) and the developing bias source (7), and which protective resistance (6) is connected to the switching element (5) in series. Controlling means and bias stabilizing means are provided, which controlling means switches on the switching element (5) when a developing bias voltage is to be applied to the developing roller (1) and switches off the switching element (5) when the developing roller (1) is caused to be in an electrically floating state without applying the developing bias voltage, and which bias stabilizing means (4) is disposed between the developing roller (1) and a ground and maintains a predetermined stable voltage only when the switching element (5) is switched on. Accordingly, a high-quality image can be formed with a low power consumption.

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