×

Exposure device for an electrophotographic apparatus

  • US 7,339,603 B2
  • Filed: 05/03/2004
  • Issued: 03/04/2008
  • Est. Priority Date: 05/16/2003
  • Status: Expired due to Fees
First Claim
Patent Images

1. An exposure device for an electrophotographic apparatus comprising:

  • one or more laser light sources which expose an image carrier in accordance with a print information signal supplied from an external information processing apparatus;

    a resolution switching lens; and

    a switching unit to switch between a low resolution and a high resolution of an image to be formed by inserting and extracting the resolution switching lens into and from a laser optical path,wherein a light emission time of each of the laser light sources with respect to a resolution of the print information signal is changeable, andwherein the light emission time of the laser light source with respect to the print information signal is set to a value by which vertical and lateral widths of each latent image dot on said image carrier are equal to each other.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×