Image forming apparatus

Details Image forming apparatus Image forming apparatus

1996-06-14

1998-06-30

Reinhart, Mark J.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

B41J 247

Patent

active

057741662

ABSTRACT:
An oscillator generates a rectangular wave, based on which sawtooth waves are produced. When a synchronizing signal which is created when a laser beam from a laser diode is incident on a photosensor, is detected, a voltage of one of the sawtooth waves is sampled to hold it as a sample-hold signal. Comparators compare the sample-hold signal with the sawtooth waves, and a flip flop alternately outputs one of the compared results, to produce a pixel clock which regularly keeps a constant time relation to the synchronizing signal.

REFERENCES:
patent: 4695805 (1987-09-01), Massingill et al.
patent: 5502578 (1996-03-01), Smitt

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