Filter
Top Products
COPYRIGHT
©
1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
4-17
CHAPTER 4 IMAGE PROCESSING SYSTEM
H. Image Memory
The copier is equipped with the following image memory:
[1] Image server (hard disk)
[2] Memory board (DRAM; page memory)
Figure 4-306 Image Memory Block Diagram
Figure 4-307 Flow of Image Data
IP PCB
MFC PCB
Memory board
Scanner input
PDL input
DRAM
CCD PCB
Image
processing
Compression /
expansion
Rotation
Memory
control
Stores images, and generates a selected number of sets.
PDL board
Frame erasing
Black density
count
Data transfer
control
To image server
1. For main scanning direction, control is
based on synchronization with the BD
signal.
For sub scanning direction, control is
based on synchronization with the
PTOP signal (image leading edge
signal generated from the registration
ON signal).
2. Controls the destination of image data.
Hard disk
Page memory to enable
synchronization of image
signals for each page.
De-compression
Compression
Image data
Memory board
Memory board
Hard disk
To laser driver PCB
Stores images in page memory
once, and waits until the previous
image is compressed.
Develops and stores images in page
memory to enable synchronization
of image signals for each page.