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Title:
OPTICAL WRITING PRINTER
Document Type and Number:
Japanese Patent JPH05177868
Kind Code:
A
Abstract:

PURPOSE: To especially uniformize printing density and to form an image having constant resolving power in an optical writing printer performing optical writing on a photosensitive body using a printing head wherein a plurality of light emitting elements are arranged in an array form.

CONSTITUTION: When image data is written in a frame memory 26, the number of the black dots contained in the image data is counted by a counter/ comparator part 25 to calculate data of a printing ratio. A CPU 20 outputs the corresponding image data to an LED head circuit on the basis of the data of the printing ratio to optically write the same on a photosensitive drum to control an optical writing time. By this constitution, the lights from light emitting elements are uniformized in brightness and image density after the formation of an image becomes constant regardless of the change of the printing ratio.


Inventors:
KATSUMI MITSUGI
Application Number:
JP34645191A
Publication Date:
July 20, 1993
Filing Date:
December 27, 1991
Export Citation:
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Assignee:
CASIO ELECTRONICS MFG CO
CASIO COMPUTER CO LTD
International Classes:
B41J2/44; B41J2/45; B41J2/455; (IPC1-7): B41J2/44; B41J2/45; B41J2/455
Attorney, Agent or Firm:
Yoshiyuki Osuge



 
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