Method, control circuit, computer program product and printing device for an electrophotographic process with temperature-compensated discharge depth regulation

US7027078B2 · kind B2 · utility

Assignee

• Oce Printing Systems GmbH · DE

Inventor

• Heiner Reihl · Freising, DE

Key dates

• Filing date: Oct 31, 2003
• Grant date: Apr 11, 2006
• Expiry date: May 25, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G2215/0478
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

With a control device to optimize charge image generation in an electrophotographic process, a light-sensitive and temperature-sensitive photoconductor layer is exposed pixel-by-pixel with a temperature-sensitive light source. The photoconductor layer becomes more sensitive with rising temperature, such that given a predetermined light quantity it discharges deeper. With rising temperature, given the same actuating power, the light source emits a lesser luminous power. The luminous power of the light source and the discharge depth of the photoconductor layer are temperature-dependent via adjustment of the current and/or the luminous duration that flows through the light source and/or the luminous duration. During the measurement of the discharge depth, a temperature measured in the course of the measurement event is used as a reference value for the temperature compensation of the light source.