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Method and apparatus for an electrophotographic printer where voltage magnitude applied to charge roller and intensity of illumination unit vary depending on type of print job submitted

  • US 6,806,895 B2
  • Filed: 09/24/2001
  • Issued: 10/19/2004
  • Est. Priority Date: 01/26/2001
  • Status: Expired due to Fees
First Claim
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1. An electrophotographic image printing method for an electrophotographic imaging apparatus, comprising the steps of:

  • providing an electrophotographic imaging apparatus, the electrophotographic imaging apparatus including;

    a charge roller;

    a developer roller;

    a laser scanning unit;

    a transfer roller;

    an organic photoconductor;

    a power supply unit for supplying power to the charge roller, the developer roller, the laser scanning unit, and the transfer roller; and

    a controller for controlling the power supply unit, the charge roller, the developer roller, the laser scanning unit, the transfer roller, and the organic photoconductor;

    selecting a resolution for electrophotographic printing;

    charging the organic photoconductor by selectively applying, to the charge roller, a charge voltage corresponding to the resolution selected for the electrophotographic printing;

    setting the charge voltage applied to the charge roller to be relatively higher in magnitude for a lower level of the resolution selected than for a higher level of the resolution selected;

    forming an electrostatic latent image on the charged organic photoconductor by means of the laser scanning unit and applying toner particles adhering to the developer roller to the electrostatic latent image to form a visible image; and

    transferring the visible image formed on the organic photoconductor to a print medium.

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