Imaging apparatus and method of predicting the photoreceptor replacement interval
AssigneeXerox Corporation
InventorsAaron Michael Burry, Michael F. Zona, Eric S. Hamby
Life of this patent
Estimating the term…
Abstract
A system and method by which, in photoreceptor devices that use non-contact charging, an impending failure of a photoreceptor can be accurately estimated based on a determined thickness of a charge transport layer in the photoreceptor. The systems and methods may include measuring current delivered to the photoreceptor charge transport layer, measuring voltage of the photoreceptor transport layer, determining a slope of the charge device, determining the thickness of the charge transport layer based on at least one of the measured current value, voltage value, or charge device slope, and determining a photoreceptor replacement interval based on the determined thickness.
Claims20
A method of predicting a photoreceptor replacement interval, comprising:
- measuring a charging current of a charging device;
- measuring a grid current from at least one of grid wires and a shield;
- measuring a voltage of a photoreceptor charge transport layer of a photoreceptor;
- computing a thickness of the photoreceptor charge transport layer based on the measured charging current, the measured grid current, and the measured voltage of the photoreceptor charge transport layer;
- determining a replacement interval based on the computed thickness of the photoreceptor charge transport layer;
- and
- at least one of storing or outputting the replacement interval.
A system for predicting a photoreceptor replacement interval, the system comprising:
- a first current measuring device that measures charge current supplied to coronode wires and outputs a first current value;
- a second current measuring device that measures grid current delivered to at least one of grid wires and a shield and outputs a second current value;
- a voltage measuring device that measures voltage of the photoreceptor charge transport layer and outputs a photoreceptor charge transport layer voltage value;
- a processor that
- receives the first current value, the second current value, and the photoreceptor charge transport layer voltage value, and
- determines a photoreceptor replacement interval based on a thickness of the photoreceptor charge transport layer, wherein the determined thickness of the photoreceptor charge transport layer is based on the first current value, the second current value, and the photoreceptor charge transport layer voltage value;
- a storage device for storing the photoreceptor replacement interval;
- and
- a display device for displaying the photoreceptor replacement interval.
Dependencies are inferred from the claim text.