Seino K.,Afit Corporation |
Ino S.,Afit Corporation |
Hirahara H.,Afit Corporation |
Konuma T.,Afit Corporation |
And 2 more authors.
International Conference on Digital Printing Technologies | Year: 2011
In a single-layer organic photoconductor, depletion charging and surface charge injection are important issues in the electrophotographic process. During the initial stages of the charging process, a finite amount of free and shallow trap generated charges are swept out of the bulk of the photoconductive layer. Also, surface charges from corona ions can be injected into the layer due to the adsorption of corona generated chemicals on the free surface. Such depletion charging and surface charge injection reduce the charge acceptance. In single-layer high gamma photoreceptors, the charge acceptance is not reduced in any degree in spite of abundant depletable carriers and excess surface charge injection. The photoinduced and dark discharge characteristics of such high gamma photoreceptors are found to be well described by a mathematical structural trap model which takes into account both carrier depletion and surface charge injection. ©2011 Society for Imaging Science and Technology.
Seino K.,AFIT Corporation |
Iino S.,AFIT Corporation |
Hirahara H.,AFIT Corporation |
Konuma T.,AFIT Corporation |
And 2 more authors.
Journal of Imaging Science and Technology | Year: 2014
A single-layer organic photoreceptor for electrophotography with relatively low concentrations of phthalocyanine pigments dispersed in a suitable insulating binder polymer, which exhibits the induction effect, is generally referred to as a high-gamma photoreceptor. Surface charges from corona ions can be injected into the photoconductive layer through chemicals adsorbed on the free surface generated by corona discharge. It has been confirmed experimentally and theoretically that an overcoat layer is effective in protecting the surface of the high-gamma photoreceptor from surface-charge injection. In this study, a high-gamma photoreceptor with X-type metal-free phthalocyanine pigment dispersed in polyester binder polymer is overcoated with isocyanate. The theoretical model, which takes into account the distributed structural-trap depth, demonstrates well the photoreceptor's photoinduced-discharge and dark-discharge characteristics. © 2014 Society for Imaging Science and Technology.
AFIT Corporation | Date: 2013-11-27
A novel liquid toner development system is disclosed. The liquid development system includes conductive core-shell particles comprising silver-copper or copper-silver. A novel apparatus and method relying on the novel liquid toner development system results in electro-conductive patterning capable of high conductivity with low background fogging, reduced processing time and reduced environmental impact.