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    CROSS SCAN BEAM POSITIONER FOR MULTIPLE CHANNEL LASER ROS
    3.
    发明专利
    CROSS SCAN BEAM POSITIONER FOR MULTIPLE CHANNEL LASER ROS 未知

    公开(公告)号：CA1229367A

    公开(公告)日：1987-11-17

    申请号：CA466699

    申请日：1984-10-31

    Applicant: XEROX CORP

    Inventor： JOHNSON RICHARD V ,  TURNER WILLIAM D

    IPC: G02B26/10 ,  G01D9/42 ,  G02F1/03 ,  G02F1/05 ,  G02F1/315 ,  G06K15/12 ,  H04N1/113

    Abstract: A multi-channel laser ROS scanner for simultaneously scanning laser beam components across multiple lines of a photosensitive surface including appratus for determining deviations in the position of the surface from a desired position due to undesired photosensitive surface velocity variations whereby an error correction signal can be generated, and a TIR modulator having a plurality of interdigitated, addressable drive electrodes. The total number of drive electrodes Nt of the TIR modulator is greater than the collective number of drive electrodes Ns needed to provide the desired pixel resolution for all of the simultaneously scanned lines. When the photosensitive surface is maintained at a desired velocity, such velocity being determined in a conventional manner by system parameters, the surface is correctly positioned and Ns adjacent drive electrodes located generally centrally within the TIR electrode configuration are addressed by the video data signals for the multiple scan lines, causing the laser beam components to exit the TIR modulator with an unshifted or "normal" propagation direction within the optical window of the modulator resulting in scan lines being recorded at desired positions on the photoreceptive surface. Should the photosensitive surface deviate from its desired position at a given time, the error signal functions to cause Ns different adjacent drive electrodes to be addressed whereby the laser beam components exiting the TIR modulator are shifted in propagation direction such that they strike the photosensitive surface at a placement which corrects for the position deviation.

    5.
    发明专利
    未知

    公开(公告)号：DE69618081D1

    公开(公告)日：2002-01-31

    申请号：DE69618081

    申请日：1996-05-31

    Applicant: XEROX CORP

    Inventor： TURNER WILLIAM D

    IPC: B41J2/445 ,  B41J2/465 ,  B41J2/525 ,  G02F1/13 ,  G02F1/1335 ,  G03G5/02 ,  G03G5/14 ,  G03G15/01 ,  H04N1/50 ,  H04N1/195

    Abstract: A printer includes an active matrix liquid crystal display (AMLCD) light valve with a matrix of a plurality of filter elements, a backlight that emits a plurality of wavelengths of electromagnetic energy that correspond to the plurality of filter elements, and a multi-layer photoreceptor that is sensitive to the plurality of wavelengths of electromagnetic energy. The backlight flash exposes the AMLCD light valve. The distinct wavelengths of electromagnetic energy passing through each of the filter elements of the AMLCD light valve are focused onto the surface of the photoreceptor. Each layer of the photoreceptor is sensitive to only one of the distinct wavelengths of electromagnetic energy passing through the filter elements of the AMLCD light valve. Thus, a full color latent image is flash exposed onto the photoreceptor. A very compact lenslet array is used to focus the image onto the photoreceptor. This reduces the overall space requirements of the printer, making it readily suitable for desktop applications.

    6.
    发明专利
    未知

    公开(公告)号：DE69517741D1

    公开(公告)日：2000-08-10

    申请号：DE69517741

    申请日：1995-04-13

    Applicant: XEROX CORP

    Inventor： HOLMES MAURICE F ,  THOMPSON MALCOLM J ,  BROWN JOHN S ,  TURNER WILLIAM D

    IPC: G03G15/04 ,  B41J2/465 ,  G06T1/00 ,  H04N1/028 ,  H04N1/036 ,  H04N1/04 ,  H04N1/195 ,  G06K15/12

    Abstract: The present invention is a digital imaging system (30) for a copier that comprises a full-frame, two-dimensional sensor array (42) to capture a document's (32) image and a full-frame output light valve with backlight (36) to flash expose the image onto a photoreceptor belt. The document is flash exposed to illuminate the page (32) and the full-page image is captured by the full-frame, two dimensional sensor array (42). The sensor array (42) then reads out the digital image data in response to a driver (46). The data is then input into the full-frame digital output light valve (50). The driver (46) provides for the synchronous control of the system. Optionally, an electronic subsystem may perform digital image processing according to user demand - before the data arrives at the output light valve (50). After image processing (if any), the digital data, supplied to the full-page output light valve (50), forms a pattern on the display according to the data. The patterned image is then flash exposed by a backlight (36), through the light valve (50), and onto a photoreceptor (56).

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