RESOLUTION CONVERSION RECORDING SYSTEM

PURPOSE:To minimize the load of hardware and record image data without any deformed black pixels by providing a variable modulation device which varies a laser beam modulation time per pixel for every recording line in a subscan direction. CONSTITUTION:If a selector controlled signal SLD is entered...

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Bibliographic Details
Main Author ARAI SEIJI
Format Patent
LanguageEnglish
Published 16.03.1990
Subjects
CALCULATING
CINEMATOGRAPHY
COMPUTING
CORRECTION OF TYPOGRAPHICAL ERRORS
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HANDLING RECORD CARRIERS
HOLOGRAPHY
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
MAGNETOGRAPHY
PERFORMING OPERATIONS
PHOTOGRAPHY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PRESENTATION OF DATA
PRINTING
RECOGNITION OF DATA
RECORD CARRIERS
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:PURPOSE:To minimize the load of hardware and record image data without any deformed black pixels by providing a variable modulation device which varies a laser beam modulation time per pixel for every recording line in a subscan direction. CONSTITUTION:If a selector controlled signal SLD is entered into a selector 26, laser beam is modulated, in a subscan direction, by the temporal width of a single pixel period for the first scan, 6/8 pixel period for the second scan and 5/8 pixel period for the third and fourth scans. Consequently, the distribution of optical intensity on a photosensitive surface is such as shown by (a), if the variation time remains unchanged. That is, the optical intensity in the boundary section with pixels PX becomes excessive, and 'black deformation' phenomenon occurs. However, if the variation time is allowed to change, the optical intensity (b) of a multi-recorded section 8 on the photosensitive surface becomes gradually lower with no 'black deformation', each time the frequency of recording is updated.
Bibliography:Application Number: JP19880229363