• Title/Summary/Keyword: Electrophotography

Search Result 6, Processing Time 0.021 seconds

A Tone Correction Halftone Method Based on Response Characteristic of Digital Printer (디지털 프린터의 출려특성기반 톤 보정 망점화)

  • 신지현
    • Journal of the Korean Graphic Arts Communication Society
    • /
    • v.15 no.1
    • /
    • pp.71-83
    • /
    • 1997
  • In recent years, various kinds of organic photoreceptors have been used for copy machines based on electrophotography. Most of them are constructed into layered devices in which a photogeneration layer is separated from a charge transport layer. They are usually used with application of negative charges. Organic pigment have received considerable attention with phthalocyanine, squaraine, and azo compounds being used to construct zerograpgic photoreceptors with enhanced long wavelength sensitivity, residual potential and zerograpgic gain of squaraine photoconductor were measured from the photoinduced discharge curve. Most of synthesized squaraine derivative couldn`t use for CGM(charge generation material), but it knew that a part of one was able to use it within the possibility. A few appliance is used it know about dependence on CTM(charge transport material) of squaraine derivative. It could know that experiment`s result is 2.5-bis(4-N-N`-diethylaminophenyl)-1,3,4-oxadiazole(OXD) is the bestproduct.

  • PDF

Introduction of the Advanced Imaging Materials -Micro-encapsulating Treatment of Toner- (최신 화상 재료의 소개 -마이크로 캡슐 토너-)

  • Lee, Yong Kyu;Jeong, Kyoung Mo;Koseki, Ken'ichi
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.44 no.6
    • /
    • pp.79-86
    • /
    • 2012
  • The aim of this general remarks is to introduce the results concerning the thermo physical, charging, developing and fusing characteristics of micro-encapsulated (MC) model toners in order to apply to the toner of electrophotographic system at the condition of a low temperature. In order to clarify the fusing mechanism of MC toner, rheological analysis of the toner was chosen. It was suggested that MC toner had a different fusing mechanism compared with non-MC toner. Some kinds of MC model toners showed a good result on adhesion test as well as cohesion test. Also, it was possible to get the good charging and development characteristic of MC toner for printing test with laser printer.

Investigations of DLC Films for Protection of Organic Photoconductors in Electrophotography

  • Ko, Myoung-Wan;Kim, Seong-Young;Shin, Seoung-Yong;Lee, Sang-Hyun;Akihiro Tanaka;Kazunori Umeda;Kazuyuki Mizuhara
    • The Korean Journal of Ceramics
    • /
    • v.3 no.2
    • /
    • pp.88-91
    • /
    • 1997
  • The diamondlike (DLC) films were deposited by RF plasma CVD system which had cathode consisting of mesh sheet, for the purpose of a protection from wear of OPC surface of the electrophotographic photosensitive body. Material charateristics and tribological properties of the films were also investigated and finally copying performance was evaluated with DLC deposited OPC samples. The surface resistance of the DLC film unaffected by the surface potential of the OPC was about $10^{11}{\Omega}$ and its hardness was about 1200 kg/$\textrm{mm}^2$. In this case the film showed typical material strcture of dimondlike hydrocarbon. The friction coefficient of the film was lowered to 0.2~0.3 at the optimum condition in this investigation and their wear resistant was inproved by DLC-deposition on the OPC surface. DLC-deposited OPC samples with a good copying performance without image flow and draft could be obtained at some depositing conditions.

  • PDF

Measurements of Adhesion Force of Micro-Sized Toner Particles Deposited on the Developing Roller Surface in a Non-contact type Laser Printer (비접촉 방식 레이저 프린터 현상롤러 위에 부착된 마이크로 토너 입자의 부착힘 측정)

  • Kim Sang-Yoon;Lee Dae-Young;Sheen Sowon;Eun Jong Moon;Hwang Jungho
    • 정보저장시스템학회:학술대회논문집
    • /
    • 2005.10a
    • /
    • pp.75-80
    • /
    • 2005
  • Study for toner adhesion is known as an important role in electrophotography. In this research, a centrifugal detachment method was used to measure the adhesion force of several hundred particles simultaneously and to determine its sensitivity to particle size. For uncharged toner particles, we estimated the van der Waals force based on the centrifugal farce experiments. Then for charged toner particles, the centrifugal force experiments were carried out. The difference between the results for charged toner particles and the results for uncharged toner particles was compared with the image force calculated from a model which assumed that the toner charge was located at the center of the particle. In the calculations, experimental data obtained by E-SPART (Electrical- Single Particle Aerodynamic Relaxation Time) analyzer were used. The adhesion force of micro-sized toner particles deposited on the DR surface was found to be approximately 1${\~}$3 nN.

  • PDF

Measurements of Adhesion Force of Micro-Sized Toner Particles Deposited on the Developing Roller Surface in a Non-contact type Laser Printer (비접촉 방식 레이저 프린터 현상롤러 위에 부착된 마이크로 토너 입자의 부착힘 측정)

  • Kim, Sang-Yoon;Lee, Dae-Young;Sheen, So-Won;Eun, Jong-Moon;Hwang, Jung-Ho
    • Transactions of the Society of Information Storage Systems
    • /
    • v.2 no.2
    • /
    • pp.105-110
    • /
    • 2006
  • Study for toner adhesion is 3non as an important role in electrophotography. In this research, a centrifugal detachment method was used to measure the adhesion force of several hundred particles simultaneously and to determine its sensitivity to particle size. For uncharged toner particles, we estimated the van der Waals force based on the centrifugal force experiments. Then for charged toner particles, the centrifugal force experiments were carried out. The difference between the results for charged toner particles and the results for uncharged toner particles was compared with the image force calculated from a model which assumed that the toner charge was located at the center of the particle. In the calculations, experimental data obtained by E-SPART (Electrical-Single Particle Aerodynamic Relaxation Time) analyzer were used. The adhesion force of micro-sized toner particles deposited on the DR surface was found to be approximately $1{\sim}3$ nN.

  • PDF

Possibility of Benzene Exposure in Workers of a Semiconductor Industry Based on the Patent Resources, 1990-2010

  • Choi, Sangjun;Park, Donguk;Park, Yunkyung
    • Safety and Health at Work
    • /
    • v.12 no.3
    • /
    • pp.403-415
    • /
    • 2021
  • Background: This study aimed to assess the possibility of benzene exposure in workers of a Korean semiconductor manufacturing company by reviewing the issued patents. Methods: A systematic patent search was conducted with the Google "Advanced Patent Search" engine using the keywords "semiconductor" and "benzene" combined with all of the words accessed on January 24, 2016. Results: As a result of the search, we reviewed 75 patent documents filed by a Korean semiconductor manufacturing company from 1994 to 2010. From 22 patents, we found that benzene could have been used as one of the carbon sources in chemical vapor deposition for capacitor; as diamond-like carbon for solar cell, graphene formation, or etching for transition metal thin film; and as a solvent for dielectric film, silicon oxide layer, nanomaterials, photoresist, rise for immersion lithography, electrophotography, and quantum dot ink. Conclusion: Considering the date of patent filing, it is possible that workers in the chemical vapor deposition, immersion lithography, and graphene formation processes could be exposed to benzene from 1996 to 2010.