Printing control apparatus compatible with printing systems of a

Details Printing control apparatus compatible with printing systems of a Printing control apparatus compatible with printing systems of a

1993-09-21

1994-10-04

Reinhart, Mark J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 121

Patent

active

053531221

ABSTRACT:
A printing control apparatus compatible with printing systems of a laser scanning unit type and a light emitting diode type contemplates a synchronizing signal supplying circuit which receives at least one signal out of a light emitting diode horizontal synchronizing signal generated when a period of a horizontal synchronizing signal of a light emitting diode type coincides with a given counting period and a beam detecting signal, and supplying a horizontal synchronizing signal corresponding to a printing system in response to a synchronizing select signal. A clock generating circuit generates a reference clock necessary for the generation of a plurality of signals and generates a video clock from the reference clock in response to the horizontal synchronizing signal and a latch driving signal from the reference clock. A latch signal generator generates a data latch signal having a given period from the reference clock in response to the latch driving signal. A strobe signal generator generates strobe signals to emit a light emitting diode array. A data output circuit generates video data to be printed according to a mode select signal. A control signal generator provides the synchronizing select signal to the synchronizing signal supplying circuit by latching an external control signal, provides the mode select signal to the data output circuit, and provides a laser diode control signal and a laser scanning unit motor control signal to the laser scanning unit.

REFERENCES:
patent: 4691237 (1987-09-01), Shinizu
patent: 4800442 (1989-01-01), Riseman et al.
patent: 4855767 (1989-08-01), Sato
patent: 4885596 (1989-05-01), Egnea et al.
patent: 5099293 (1992-03-01), Kawai
patent: 5107278 (1992-04-01), Shimada et al.
patent: 5134512 (1992-07-01), Hiwada
patent: 5140675 (1992-08-01), Okada

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