Recording signal generating circuit for printing

Details Recording signal generating circuit for printing Recording signal generating circuit for printing

1989-02-22

1989-08-08

Albritton, C. L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358300, 358447, H04N 123, H04N 140

Patent

active

048558419

ABSTRACT:
A recording signal generating circuit for printing comprises a shift register for sequentially storing image information on a predetermined number of consecutive pixels. A recording signal pulse width setting circuit normally sets a pulse width of a recording signal for each of a pixel information to a standard pulse width. The setting circuit sets a pulse width of the recording signal for a pixel positioned at the center of the shift register (a pixel of interest) to a wider pulse width when an isolated black pixel pattern is detected. Alternatively the setting circuit sets a pulse width of the recording signal for one of the pixels just preceding and following the pixel of interest to a narrower pulse width when an isolated white pixel pattern is detected.

REFERENCES:
patent: 4387983 (1983-06-01), Masegi
patent: 4706130 (1987-11-01), Yamakawa
patent: 4734782 (1988-03-01), Maeshima

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