Halftone processing method in laser printer and apparatus...

Details Halftone processing method in laser printer and apparatus... Halftone processing method in laser printer and apparatus...

2008-01-01

2008-01-01

Tran, Huan (Department: 2861)

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

C347S240000, C347S254000, C358S003060

Reexamination Certificate

active

11131213

ABSTRACT:
A halftone processing method for correcting the variation in light intensity on a photoconductive drum and an apparatus using the same, wherein the method includes the steps of preparing a plurality of dithering functions, detecting the position where image data for forming an electrostatic latent image is scanned on the photoconductive drum, selecting one of the plurality of dithering functions according to the detected scanning position, and halftone-processing the image data using the selected dithering function. Accordingly, the halftone processing method improves print quality by increasing light intensity at the edges of a photoconductive drum by permitting the laser printer to be halftone-processed using dithering functions whose critical values are different for the center and the edges of the photoconductive drum.

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