Method and apparatus for recording digital data on image-receiving medium
AssigneePro Archive AG
InventorDaniel Fluck
Life of this patent
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Abstract
The invention relates to a method and apparatus for recording digital data on an image-receiving medium (20). The recording head (71) is transported along a slow-scan-direction (Y) and digital image data is recorded along a fast-scan-direction (X). The recording head (71) is decoupled from its drive (60) during recording of digital image data of a line or an image or part of it. The transient movement of the recording head (71) along the fast-scan-direction (X) is detected before and/or during exposure using a sensor system (52, 53) and these signals are used to derive a high precision synchronized clock by suitable interpolation and/or extrapolation for the recording of image data to the image-receiving medium (20).
Claims31
A method for recording digital data on an image-receiving medium by means of a recording head, wherein the image-receiving medium and the recording head are driven and moved relatively to each other along a fast-scan direction, the image-receiving medium and the recording head are driven and moved relatively to each other along a slow-scan direction, and digital image data is recorded on the image-receiving medium, wherein while recording the image data the image-receiving medium and the recording head are moving on relatively to each other along the fast-scan direction, without being driven, by means of inertia, and a non-driven motion behaviour of the recording head relative to the image-receiving medium along the fast-scan direction is detected prior to and/or while recording of the image data, and synchronisation signals and a momentary clock frequency for retrieving and recording the image data are derived therefrom by suitable interpolation and/or extrapolation.
An apparatus for recording digital image data on an image-receiving medium comprising holding means for holding the image-receiving medium, an image data memory for storing the image data to be applied, a recording head for recording the image data supplied from the image data memory onto the image-receiving medium, wherein the held image-receiving medium and the recording head are movable relatively to each other along a fast-scan direction and along a slow-scan direction, a fast-scan drive for driving the held image-receiving medium mid the recording head relatively to each other along the fast-scan direction, a slow-scan drive for driving the held image-receiving medium and the recording head relatively to each other along the slow-scan direction, a fast-scan sensor for detecting the mutual position of the held image receiving medium and the recording head along the fast-scan direction, and a slow-scan sensor for detecting the mutual position of the held image medium and the recording head along the slow-scan direction, wherein the fast-scan drive can be decoupled from the held image-receiving medium and/or from the recording head and a control unit is provided connected to the fast-scan sensor, the slow-scan sensor, the fast-scan drive, the slow-scan drive and the image data memory for detecting a motion behaviour of the recording head relative to the image-receiving medium along the fast-scan direction and for deriving synchronization signals and a momentary clock frequency for retrieving and recording the image data.
Dependencies are inferred from the claim text.