Ccd/Ccd Driver - Canon 1000 Service Manual

Color laser copier

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B. CCD/CCD Driver

The CLC1000's image input block is a 3-line CCD line sensor, each line consisting of 5000 photocells

(Figure 3-302). Each line is covered with a red, green, or blue color filter.

The light reflected by an original is projected to the CCD line sensor in reduced form, and the light color-

separated by the R, G, and B color filters is photo-converted. The signal charges occurring after conversion

are synchronized with the shift pulses generated by the analog processor PCB and stored temporarily in the

transfer block (single line); then, they are synchronized with the clock pulses generated by the analog

processor PCB and sent to the CCD in sequence.

Light-receiving block

Transfer block

The transfer block and the output block of each line sensor consist of an odd channel and an even

Clock pulses (odd)

Transfer block (odd)

Light-receiving block

Transfer block (even)

Clock pulses (even)

Figure 3-302

Figure 3-303

CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)

3. OPERATION AND TIMING

Output block (odd)

CCD shift pulses

Output block (even)

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