Fringe field tailoring with sub-pixel patterns for improved...

Details Fringe field tailoring with sub-pixel patterns for improved... Fringe field tailoring with sub-pixel patterns for improved...

2006-08-01

2006-08-01

Rogers, Scott (Department: 2626)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003270, C382S269000

Reexamination Certificate

active

07085003

ABSTRACT:
Utilization of fringe field tailoring pixels with sub-pixel patterns are introduced into the bitmap of an image to obtain local control of the normal and tangential electric fields and thereby improve image development. These fringe field tailoring pixels embody multiple sub-pixel pulses so as to alter the electric fields as developed upon the photoreceptor. These fringe field tailoring pixels compensate for the otherwise undesirable electric fringe fields as found on the edge of image shapes. These undesirable fringe fields pull toner away from image edges and cause other “slow toner” effects, particularly in high speed systems. Application of fringe field tailoring pixels with their sub-pixel patterns to the edge of an image shape modifies the fringe electric fields so as to encourage pulling toner onto the photoreceptor at the image edge. This ensures adequate toner supply to all parts of the image so that the desired printing pixels will print as intended.

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Robert J. Meyer and Allen T. Retzlaff, Jr. entitled “Auxiliary Pixel Patterns for Improving Print Quality”, U.S. application No. 09/362,021, filed Jul. 27, 1999 (D/96602).
Robert J. Meyer and Allen T. Retzlaff, Jr. entitled “Improved Digital Halftone with Auxiliary Pixels”, U.S. application No. 09/362,022, filed Jul. 27, 1999 (D/96602Q1).
Robert J. Meyer and Allen T. Retzlaff, Jr. entitled “Non-Printing Patterns for Improving Font Print Quality”, U.S. application No. 09/362,020, filed Jul. 27, 1999 (D/96602Q2).

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