Data recording using randomized variations to prevent visual art

Details Data recording using randomized variations to prevent visual art Data recording using randomized variations to prevent visual art

1994-09-23

1999-06-22

Barlow, Jr., John E.

Incremental printing of symbolic information

Ink jet

Controller

347 15, B41J 2938, B41J 2205

Patent

active

059147318

ABSTRACT:
A column band pattern memory (10) stores six different column band patterns "SML, SLM, MSL, MLS, LSM, and LMS" obtained by re-arranging three different area modulation ranks (L, M, and S). A column band pattern generator (12) irregularly selects one of the column band patterns stored in the column band pattern memory (10) on the basis of a numerical value generated by a random number generator (11). The selected column band pattern is input to a dot area determination unit (13), and dot areas in units of columns are determined on the basis of the order of dot area modulation ranks (e.g., the order of S, M, and L) in the selected column band pattern. A pulse controller (14) performs pulse control to form dots in accordance with the dot areas determined by the dot area determination unit (13).

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Patent Abstracts of Japan, vol. 6, No. 61 (M-123) (939) Apr. 20, 1982 & JP-A-57 002 773 ( Nippon Denshin Denwa Kosha) Jan. 8, 1982.

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