• 제목/요약/키워드: ink-jet

검색결과 241건 처리시간 0.03초

Fabrication of Polymer TFT Arrays on Plastic Substrates Using a Low Temperature Manufacturing Process

  • Kao, Chi-Jen;Wang, Yi-Kai;Peng, Yu-Rung;Yang, Tsung-Hua;Hu, Tarng-Shiang;Hou, Jack
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
    • /
    • pp.1568-1570
    • /
    • 2008
  • In this paper, fabrication of a $60{\times}48$ polymer TFT array with a top-gate structure on plastic substrates using a low temperature printing process will be presented and the device structure and manufacturing processes will be discussed. The polymer TFT array showed excellent air stability and uniform electrical characteristics over a large area. Finally, a 1.5 inch EPD display with 50 dpi resolution using the polymer TFT array will be demonstrated for e-film device applications.

  • PDF

Inkjet-print patterned transparent conductive CNT films

  • Kim, Mun-Ja;Shin, Jun-Ho;Lee, Jong-Hak;Lee, Hyun-Chul;Yoo, Ji-Beom
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
    • /
    • pp.1119-1121
    • /
    • 2006
  • Using a chemical radical we modified the surface property of PET substrates. The chemically treated substrate surface improved dispersion of CNTs on substrate and provides suitable adhesion of CNTs to substrate. In addition, an ink-jet printed patterning technique effectively improved the transparency of transparent conductive CNT composite films.

  • PDF

미세 펀칭 구멍의 디버링 특성에 관한 연구 (A Study on the Characteristics of Deburring for Micro Punching Holes)

  • 안병운;최용수;박성준;윤종학
    • 한국공작기계학회:학술대회논문집
    • /
    • 한국공작기계학회 2003년도 추계학술대회
    • /
    • pp.329-333
    • /
    • 2003
  • In micro hole punching process the burr occurs inevitably, but the burr must be minimized in order to improve the quality and accuracy of the product. In this study, magnetic field assisted polishing technique is applied to remove the burr which exists in nozzles for ink-jet printer head and proved to be a feasible for deburring by experiment. The deburring characteristics of sheet metals was investigated changing with polishing time. After the deburring, the burr size has remarkably reduced and roundness of the hole also has improved.

  • PDF

CCD 카메라를 사용한 전기수력학적 잉크젯 토출 현상 가시화 (Visualization of Electro-hydrodynamic Ink Jetting using CCD Camera)

  • 권계시;이대용
    • 한국정밀공학회지
    • /
    • 제29권3호
    • /
    • pp.295-301
    • /
    • 2012
  • The method for spraying of liquids through an electrical field has become a printing method since it can make very small droplet. For electro-hydrodynamic jet printing to become a reliable jetting tool, the jetting performance should be characterized with respect to various jetting conditions. To optimize jetting conditions, the jetting behavior should be measured. In this study, we present a visualization techniques to measure jetting behavior from electro-hydrodynamic (EHD) inkjet head. Unlike most previous method, we use the CCD camera to measure the jetting behavior. For this purpose, LED light is synchronized with jetting signal and sequential image was obtained by adjusting the delay time of the LED light. Finally, merits and demerits of using CCD camera were discussed to measure jetting image from EHD inkjet head.

Printed Polymer Thin-Film Transistors for Flexible Display

  • 이지열;김도환;유병욱;김주영;문현식;이방린;박정일;구본원;진용완;이상윤
    • 한국재료학회:학술대회논문집
    • /
    • 한국재료학회 2010년도 춘계학술발표대회
    • /
    • pp.18.1-18.1
    • /
    • 2010
  • Here, we introduce our R&D status and strategies for printed electronics containing the two types of aspects such as materials and process/architectures. Specially, in this talk, we focus on the high-performance polymer thin film transistors (PTFTs) backplanes fabricated by ink-jet printing using new polymer semiconductors for the applications of flexible display.

  • PDF

프린터의 Black Printer Algorithm에 관한 연구 (A Study on the Black Printer Algorithm for Ink Jet Printer)

  • 김홍기;조맹섭
    • 한국정보처리학회:학술대회논문집
    • /
    • 한국정보처리학회 2000년도 추계학술발표논문집 (상)
    • /
    • pp.441-444
    • /
    • 2000
  • BPA(Black Printer Algorithm)은 잉크젯 프린터에서 사용되는 C(사이안), M(마젠타), Y(옐로우) 잉크에 대한 검정(Black) 잉크의 양을 결정하는 알고리즘이다. CMY 잉크로 인쇄한 이미지의 칼라 품질은 모니터가 재생할 수는 있는 칼라 영역보다 적다. 또한 CMY 잉크를 각각 100% 씩 섞었을 때 이론적으로는 검정 색이 나와야 하나 실제는 검정 색을 정확하게 재현하지 못한다. 그래서 대부분의 프린터는 검정(K) 잉크를 기본으로 제공하며 CMY 잉크로 표현될 회색 영역의 부분을 검정 잉크로 대신 표현해 주기 때문에 프린터의 재현 영역을 확장시킬 수 있다. 또한 검정 잉크의 사용으로 인쇄품질의 색조 대비(contrast)를 증가시킬 수 있고 CMY 잉크를 검정 잉크로 대신 인쇄하기 때문에 CMY 잉크를 절약하는 효과를 얻을 수 있다. 본 논문에서는 본 잉크젯 프린터의 K(black) 잉크와 CMY(cyan, magenta, yellow) 잉크와의 관계를 살펴보았고 이 특성을 이용해 검정 잉크를 조절하는 방법 중에 하나인 3차 다항식의 BPA(Black Printer Algorithm)를 구현하였다. 결과에서는 성능 테스트에 대한 내용과 성능 향상을 위한 방법에 대해 논의하였다.

  • PDF

3차원 프린팅(3DP) 공정을 기반으로 한 임의형상제작(SFF) 시스템 개발에 관한 연구 (A Study on the Development of SFF System based on 3DP Process)

  • 이원희;김정수;이민철;김동수
    • 한국정밀공학회지
    • /
    • 제23권7호
    • /
    • pp.168-176
    • /
    • 2006
  • Nowadays, Three dimensional printing (3DP) technique that is one of solid freeform fabrication (SFF) technology has been notable issue, and has been applied by various fields. The SFF system can fabricate three dimensional objects of solid freeform with high speed and low cost using ink jet printing technology. In this research, a SFF system to analyze 3DP process technology is developed. We applied sliding mode control with sliding perturbation observer (SMCSPO) algorithm and minimized position error to the developed SFF system. We analyzed and optimized process variables such as jetted volume, layer thickness, powder bed and so on experimentally. Also. the dimensional error of a developed SFF system is evaluated. Finally, the feasibility of application to bio manufacturing is presented through successful fabrication of teeth and cranium model.

Threshold Voltage Shift in (4-pentylphenylethynyl)-dithienyl-anthracene Organic Thin-film Transistor with Self-assembled Monolayer

  • Lee, Sun-Hee;Kim, Sung-Hoon;Han, Seung-Hoon;Choi, Min-Hee;Jeong, Yong-Bin;Choo, Dong-Joon;Jang, Jin
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
    • /
    • pp.858-860
    • /
    • 2009
  • We have applied self-assembled monolayer to make high performance and stable OTFT on the organic gate dielectric. The ${\beta}$-phenethyltrichlorosilane (SAM) was coated on the organic gate dielectric and then active layer was printed. Significant improvements in on-currents and threshold voltage shift were achieved for the SAM treated devices compared to device without SAM.

  • PDF

잉크젯프린터의 칼라 보정을 위한 오차역전파 알고리즘의 매핑 연구 (A Study on the Mapping for Adjustment of Colors on Ink Jet Printer with Error Back Propagation)

  • 김홍기;조맹섭
    • 한국정보과학회:학술대회논문집
    • /
    • 한국정보과학회 2000년도 가을 학술발표논문집 Vol.27 No.2 (2)
    • /
    • pp.323-325
    • /
    • 2000
  • 정보통신의 발전에 따라 컴퓨터 및 주변 장치간에 칼라를 정확히 재생할 수 있는 능력이 산업 경쟁력에 중요한 요소로 부상하고 있다. 본 논문에서는 모니터 상의 이미지를 프린터로 인쇄하기 위하여 사용되는 기존의 참조테이블(Look Up Table) 방식을 살펴보고 이 기능을 대체할 수 있는 신경회로망에 의한 칼라보정 매핑 방법을 제안하였다. 참조테이블 방식에서는 3차원으로 구성된 테이블을 구성하기가 쉽지 않고 구간 사이의 칼라값은 보간법을 써서 구해야 한다. 신경회로망에 의한 방법에서는 일단 학습을 완료하면 실시간으로 칼라를 보정해 주는 장점이 있다. 실험에서는 두 가지 방법에 의한 칼라 샘플의 모델을 통한 결과 값을 비교해 보고 상호간의 장단점과 성능 향상을 위한 방법을 토의하였다.

  • PDF

Fabricating Using Nano-particulates with Direct Write Technology

  • Sears, James;Colvin, Jacob;Carter, Michael
    • 한국분말야금학회:학술대회논문집
    • /
    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
    • /
    • pp.372-373
    • /
    • 2006
  • Modern business trends call for miniaturization of electronic systems. One of the major impedances in this miniaturization is the conductive and inductive components in chips and circuit boards. Direct Write Technology can write these soft magnetic materials, thus allowing for further miniaturization of inductor devices. Another obstacle in electronics fabrication is the size limitations of thick screen-printing and the material limitations in ink jet printing. Direct Write Technologies address both of these limitations by providing feature sizes less than 20 microns with a wide range of materials possibilities. A discussion of the application of these nano-particulate materials by Direct Write Technologies will be presented.

  • PDF