Browse Prior Art Database

Printer Resolution Lamp

IP.com Disclosure Number: IPCOM000119425D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 1 page(s) / 27K

Publishing Venue

IBM

Related People

Adley, JM: AUTHOR [+4]

Abstract

Electrophotographic printers require charge elimination lamps (erase) somewhere in the process to facilitate cleaning or transfer. If, in addition to light that effects photoconductor discharge (520mm - 850mm), some U-V light (340mm - 380mm) is also present (see figure), the surface conductance of the photoconductor is reduced. This is accomplished by a combination of converting DEH within the photoconductor to an indazole, and by altering the surface charge trap states of the photoconductor.

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Printer Resolution Lamp

      Electrophotographic printers require charge elimination lamps
(erase) somewhere in the process to facilitate cleaning or transfer.
If, in addition to light that effects photoconductor discharge (520mm
- 850mm), some U-V light (340mm - 380mm) is also present (see
figure), the surface conductance of the photoconductor is reduced.
This is accomplished by a combination of converting DEH within the
photoconductor to an indazole, and by altering the surface charge
trap states of the photoconductor.

      Use of such a lamp provides high resolution over the life of
the photoconductor.  High levels of U-V energy (>10J/cm2) may cause
the maximum discharge levels (residual charge) to increase, but
surface conductance will remain low throughout the useful
photoconductor life (useful life is a machine-dependent parameter).

      Disclosed anonymously.