Image forming apparatus and control method for reducing the requ

Details Image forming apparatus and control method for reducing the requ Image forming apparatus and control method for reducing the requ

1996-09-11

1998-10-13

Fulller, Benjamin R.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347248, 399 52, 399212, H04N 104

Patent

active

058219773

ABSTRACT:
The invention provides an image forming apparatus which requires only a little standby time at the time of shifting from a standby state to a usual operation state, and accordingly can reduce the required processing time. In a copy machine 2 employed in the invention, a scanner CPU 121 generates a timing signal with a number of clocks substantially equal to the number of clocks of a horizontal synchronization signal, thereby performing shading correction of the output of a CCD line sensor 24 using a shading correction circuit 126. The scanner CPU 121 counts clocks CKS, each of which is obtained by dividing, using the divider 168, the frequency of a reference clock CK by a predetermined value, and outputs a pulse signal as the timing signal substantially in synchronism with the output of a horizontal synchronization signal when the number of counted clocks CKS reaches a predetermined value.

REFERENCES:
patent: 5107279 (1992-04-01), Yamamoto et al.
patent: 5241330 (1993-08-01), Kawabata et al.

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