公开(公告)号：US06806894B2

公开(公告)日：2004-10-19

申请号：US10631473

申请日：2003-07-31

Applicant: Yuichi Seki

Inventor： Yuichi Seki

IPC: B41J2385

CPC classification number: H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02443 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04758 ,  H04N2201/04798

Abstract: There is provided an image forming apparatus that is capable of securing required printing quality by properly correcting a main scanning scale. In a pixel division modulating process, for each of one or more correction points (at l-th, m-th, and n-th pixels) on each of lines along which scanning is carried out on a photosensitive drum 11 by laser light, the final bit data of pixel-division-modulated pixel data of a pixel immediately preceding each correction point is added to the pixel data of a pixel located at the correction point as the leading bit data of the pixel-division-modulated pixel data of this pixel. The same processing as above is sequentially performed on pixel data of pixels located subsequently to the correction point to sequentially shift predetermined bit data of pixel data of pixels to pixel data of the respective following pixels, to thereby generate pixel data of a new pixel. The generated pixel data of the new pixel is outputted in synchronism with an image clock of a fixed frequency.

Abstract translation: 提供了一种图像形成装置，其能够通过适当地校正主扫描标尺来确保所需的打印质量。 在像素分割调制处理中，对于通过激光在感光鼓11上进行扫描的每条线上的一个或多个校正点（第1，第m和第n像素）中的每一个， 紧接在每个校正点之前的像素的像素分割调制像素数据的最终比特数据被添加到位于校正点的像素的像素数据，作为该像素分割调制像素数据的前导比特数据 像素。 对位于校正点后面的像素的像素数据顺序执行与上述相同的处理，以将像素的像素数据的预定位数据顺序地移位到各个跟随像素的像素数据，从而生成新像素的像素数据。 所生成的新像素的像素数据与固定频率的图像时钟同步输出。

公开(公告)号：US20030118141A1

公开(公告)日：2003-06-26

申请号：US10024416

申请日：2001-12-21

Applicant: Xerox Corporation

Inventor： Michael B. Neary

IPC: H03D003/24

CPC classification number: H03L7/189 ,  H03L7/199 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/02443 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04758 ,  H04N2201/04772 ,  H04N2201/04794 ,  H04N2201/04798

Abstract: A method for calibrating a VCO within a phase locked loop circuit is disclosed. First, a DAC output voltage is set to its minimum, and a counter M is adjusted until a comparator is its threshold voltage. Next, the DAC is set to another voltage, and counter M is again adjusted to the comparator threshold. This process is repeated for as many steps as desired. When the phase locked loop circuit requests an instantaneous frequency, an interpolation of the requested frequency against the curve created by the above-described method gives the value required by the DAC.

Abstract translation: 公开了一种在锁相环电路内校准VCO的方法。 首先，将DAC输出电压设置为最小值，并且调整计数器M直到比较器为其阈值电压。 接下来，将DAC设置为另一电压，并且将计数器M再次调整为比较器阈值。 根据需要重复这个步骤。 当锁相环电路请求瞬时频率时，根据上述方法产生的曲线对所请求频率的插值给出DAC需要的值。

公开(公告)号：EP1811762A2

公开(公告)日：2007-07-25

申请号：EP07250219.8

申请日：2007-01-19

Applicant: Ricoh Company, Ltd.

Inventor： Hatano, Takashi c/o Ricoh Co., Ltd

IPC: H04N1/04

CPC classification number: H04N1/387 ,  H04N1/00795 ,  H04N1/00801 ,  H04N1/00811 ,  H04N1/00816 ,  H04N1/0402 ,  H04N1/053 ,  H04N2201/04703 ,  H04N2201/04758 ,  H04N2201/04789

Abstract: An image reading device includes reading means, which reads an original into image data by scanning the original in the main scanning direction at an image reading width while the original is being fed in a sub scanning direction; and setting means, which sets the image reading width to a maximum reading width of the reading means when reading settings information including a user instruction for setting the image reading width to the maximum reading width is input.

Abstract translation: 图像读取装置包括：读取装置，其通过在原稿沿副扫描方向进给的同时以原稿沿主扫描方向以图像读取宽度扫描原稿而读取图像数据; 并且当将包括用于将图像读取宽度设置为最大读取宽度的用户指令的设置信息输入时，将图像读取宽度设置为读取装置的最大读取宽度的设置装置。

公开(公告)号：EP0659011B1

公开(公告)日：1999-12-08

申请号：EP94307160.5

申请日：1994-09-30

Applicant: XEROX CORPORATION

Inventor： Wilson, James M.

IPC: H04N1/047 ,  H04N1/191 ,  G06K15/12

CPC classification number: H04N1/0473 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/02441 ,  H04N2201/0471 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04749 ,  H04N2201/04758 ,  H04N2201/04794 ,  H04N2201/04796

Abstract: A raster scanning system (30) is disclosed which utilizes a laser light source (32) with a plurality of diodes (34,36), at least two of which are offset relative to each other. Either one diode or two offset diodes (34,36) will be selected to scan one scan line. If two offset diodes (34,36) are selected, two light beams (38,40) can be generated to scan two partially overlapping paths (spots Sa, Sb) to form a scan line (spot Sr; Fig. 3). By changing the intensity of the two light beams (38,40) or by selecting two different offset diodes (34,36), the scan line (spot Sr; Fig. 3) can be moved up or down in the sagittal plane (50). This concept can be used to correct the wobble of a scan line (spot Sr; Fig. 3) in which case, either one diode or two offset diodes (34,36) will be selected to scan one scan line (spot Sr; Fig. 3) in its correct position. Also, the same concept can be used to correct a bow of a scan line (spot Sr; Fig. 3) in which case, either one diode or two offset diodes (34,36) will be selected for each pixel to correct the bow in accordance with a pre-defined correction data for that pixel which is stored in a memory.

公开(公告)号：EP0808054A3

公开(公告)日：1999-05-12

申请号：EP97108051.0

申请日：1997-05-16

Applicant: NEC CORPORATION

Inventor： Matsui, Daisuke

IPC: H04N1/047

CPC classification number: H04N1/0473 ,  H04N1/107 ,  H04N1/193 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04734 ,  H04N2201/04758 ,  H04N2201/04794

Abstract: An image reading apparatus that, when the speed for reading document exceeds a permissible reading speed of the reader 2, a data controller 100 automatically converts the image data 11 to converted data having the same line image data as the line image data following to the line image data supplied from the reader 2 when the relative moving speed between the reader 2 and the document 1 exceeds a predetermined value, and supplies the converted data to the image processor 5.

Abstract translation: 一种图像读取装置，当读取文件的速度超过读取器2的允许读取速度时，数据控制器100自动将图像数据11转换为具有与行之后的行图像数据相同的行图像数据的转换数据 当读取器2和文档1之间的相对移动速度超过预定值时从读取器2提供的图像数据，并将转换的数据提供给图像处理器5.

公开(公告)号：EP0549204A1

公开(公告)日：1993-06-30

申请号：EP92311288.2

申请日：1992-12-10

Applicant: XEROX CORPORATION

Inventor： Paoli, Thomas L.

IPC: H04N1/04

CPC classification number: H04N1/0473 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04734 ,  H04N2201/04758 ,  H04N2201/04793 ,  H04N2201/04794

Abstract: In a raster scanning optical output device, for example in a laser printer, an array (50) of independently addressable light emitting devices, such as an array of solid state lasers, is used to control spot position on an image plane (32) in the slow scan direction. The array is disposed such that the spots produced by the light beams (72a,72b) emitted from each element of the array impinge on the image plane displaced in the slow scan direction from one another. The total distance between all the spots is less than the distance between fast scan direction scan lines. Only a single element of the array is operated per scan line, thus only a single spot is formed on the image plane per scan line. Control of which of the elements of the array emits a light beam per scan line allows control of the spot position in the slow scan direction for that scan line.

Abstract translation: 在光栅扫描光输出装置中，例如在激光打印机中，使用诸如固态激光器阵列的可独立寻址的发光装置的阵列（50）来控制图像平面（32）上的光点位置 慢扫描方向。 阵列被布置成使得由从阵列的每个元件发射的光束（72a，72b）产生的光斑撞击在彼此沿慢扫描方向移位的图像平面上。 所有点之间的总距离小于快速扫描方向扫描线之间的距离。 每个扫描线仅对阵列的单个元件进行操作，因此每个扫描线在图像平面上仅形成一个点。 控制每个扫描线阵列中的哪一个元件发射光束可以控制该扫描线的慢扫描方向的光点位置。

公开(公告)号：EP0471996A3

公开(公告)日：1992-08-05

申请号：EP91112395.8

申请日：1991-07-24

Applicant: MANAGEMENT GRAPHICS, INC.

Inventor： Olson, Thor A. ,  Keeney, Richard A.

IPC: H04N1/04 ,  H04N1/036 ,  H04N5/87

CPC classification number: H04N1/047 ,  H04N1/036 ,  H04N1/1004 ,  H04N5/87 ,  H04N2201/02425 ,  H04N2201/02439 ,  H04N2201/0315 ,  H04N2201/0471 ,  H04N2201/04718 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04758 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

Abstract: Registration of an image with respect to a recording medium in a film recorder or the like is provided by first roughly positioning the recording medium in a support. A beam is then scanned across an unused portion of the recording medium until it impinges a fixed reference mark such as a sprocket hole edge. The coordinates of the beam are determined at the reference mark, and a registration signal is computed therefrom. The beam is then scanned across the recording medium in response to the registration signal to record information in registered relation to the reference mark. An intensity profile of the beam is calculated as it passes over an edge of the recording medium. The focus of the beam is then adjusted according to the intensity profile. Adjustment of both beam focus and lens focus is provided.

公开(公告)号：EP1035730B1

公开(公告)日：2008-08-13

申请号：EP00105049.1

申请日：2000-03-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kato, Manabu, c/o Canon Kabushiki Kaisha

IPC: H04N1/50

CPC classification number: H04N1/053 ,  G02B26/123 ,  G02B26/127 ,  H04N1/1135 ,  H04N1/1911 ,  H04N1/506 ,  H04N2201/02439 ,  H04N2201/04713 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04758 ,  H04N2201/04781 ,  H04N2201/04794

Abstract: A multibeam scanning optical apparatus comprises a light source, an incident optical system, an optical deflector, a scanning optical system, a detection optical element, and a photodetector. A plurality of light beams modulated in accordance with information signals are emitted from the light source and lead to the optical deflector, typically a rotary polygon mirror, by way of the incident optical system, typically a collimator lens and a cylindrical lens. The light beams deflected by the optical deflector are then focussed on a surface to be scanned, typically a photosensitive drum, by way of the scanning optical system having an f&thetas; characteristic. Part of the deflected light beams are lead to the photodetector by way of the detection optical system in order to control the timing of the start of scanning so that the centers of the scanning areas of the plurality of light beams agree with each other on the surface to be scanned. In case of a color image forming apparatus comprising a plurality of scanning optical apparatus, the above control scheme can be applied even when the scanning optical apparatus have a single beam light source.

公开(公告)号：EP1517539A3

公开(公告)日：2005-09-21

申请号：EP04028760.9

申请日：2000-03-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kato, Manabu

IPC: H04N1/50 ,  H04N1/04

CPC classification number: H04N1/053 ,  G02B26/123 ,  G02B26/127 ,  H04N1/1135 ,  H04N1/1911 ,  H04N1/506 ,  H04N2201/02439 ,  H04N2201/04713 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04758 ,  H04N2201/04781 ,  H04N2201/04794

Abstract: A multibeam scanning optical apparatus comprises a light source, an incident optical system, an optical deflector, a scanning optical system, a detection optical element, and a photodetector. A plurality of light beams modulated in accordance with information signals are emitted from the light source and led to the optical deflector, typically a rotary polygon mirror, by way of the incident optical system, typically a collimator lens and a cylindrical lens. The light beams deflected by the optical deflector are then focussed on a surface to be scanned, typically a photosensitive drum, by way of the scanning optical system having an fθ characteristic. Part of the deflected light beams are led to the photodetector by way of the detection optical system in order to control the timing of the start of scanning so that the centers of the scanning areas of the plurality of light beams agree with each other on the surface to be scanned. In case of a color image forming apparatus comprising a plurality of scanning optical apparatus, the above control scheme can be applied even when the scanning optical apparatus have a single beam light source. The starting points of scanning of light beams of different wave lengths are allowed to differ from each other in a main scanning direction.

公开(公告)号：EP1035730A3

公开(公告)日：2003-10-01

申请号：EP00105049.1

申请日：2000-03-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kato, Manabu, c/o Canon Kabushiki Kaisha

IPC: H04N1/50

CPC classification number: H04N1/053 ,  G02B26/123 ,  G02B26/127 ,  H04N1/1135 ,  H04N1/1911 ,  H04N1/506 ,  H04N2201/02439 ,  H04N2201/04713 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04758 ,  H04N2201/04781 ,  H04N2201/04794

Abstract: A multibeam scanning optical apparatus comprises a light source, an incident optical system, an optical deflector, a scanning optical system, a detection optical element, and a photodetector. A plurality of light beams modulated in accordance with information signals are emitted from the light source and lead to the optical deflector, typically a rotary polygon mirror, by way of the incident optical system, typically a collimator lens and a cylindrical lens. The light beams deflected by the optical deflector are then focussed on a surface to be scanned, typically a photosensitive drum, by way of the scanning optical system having an fθ characteristic. Part of the deflected light beams are lead to the photodetector by way of the detection optical system in order to control the timing of the start of scanning so that the centers of the scanning areas of the plurality of light beams agree with each other on the surface to be scanned. In case of a color image forming apparatus comprising a plurality of scanning optical apparatus, the above control scheme can be applied even when the scanning optical apparatus have a single beam light source.