Printing System Models - Control of Color Imaging Systems: Analysis and Design - page 571

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FIGURE 10.13 Example of the gray-scale image without a biased development electrode.

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FIGURE 10.14 Example of the gray-scale image with a biased development electrode.

| V h |

V dev

V bias

V clean

| V L |

FIGURE 10.15 Development and cleaning voltages in a CAD system.

discharged region, then the development and cleaning voltages can be written as
(Figure 10.15)

V dev ¼ V h V bias
V clean ¼ V bias V L

( 10 : 28 )

For DAD, which is more commonly used than CAD, only the discharged areas of the
photoconductor will attract toner from the development zone. Other negatively