• Title/Summary/Keyword: Printing Technique

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Development of Anti-Glare Coating Technique Using Screen Printing (스크린 프린팅 기법을 이용한 눈부심 방지 기술 개발)

  • Choi, Jeongju
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.6
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    • pp.272-277
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    • 2019
  • In this paper, a manufacturing method of an anti-glare cover glass on LCD for outdoor use is proposed. The main specification of cover glass is hardness and anti-glare. Hardness is achieved by using the tempered glass, and anti-glare(AG) film is laminated to meet anti-glare specification no the tempered glass. However, the AG film is difficult to maintain the AG performance continuously because the abrasion resistance of the PET film itself is as weak as about 3H. Therefore, a novel production procedure using screen printing method is proposed. The proposed coating is implemented by applying $ZnO-B_2O_3-SiO_2$ powder on glass surface and the glass is made with enhanced hardness through tempering process. In order to apply the ZBS powder uniformly on the glass surface, a screen printing process is used. The main parameters to be considered in screen printing are the oil concentration and mesh opening size. Because the amount of ZBS powder applied to the printing process is controlled by these two parameters, the correlativity is confirmed through the experiments. In order to evaluate the performance of the proposed method, the haze, surface roughness and transmittance are selected as the performance index and are compared with the AG film. As a result of comparison, it is verified that the transmittance of the proposed tempered glass is 83.1%, which is slightly lower than 89.5% of AG film, but the hardness is more than double to 7H.

A Study on Hydrophobic Surface Treatment for Microfluidic System Fabrication Based on SLA 3D Printing Method (SLA 3D 프린팅 방식 기반의 미세 유체 시스템 제작을 위한 소수성 표면 처리 연구)

  • Jae Uk Heo;Seo Jun Bae;Do Jin Im
    • Korean Chemical Engineering Research
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    • v.62 no.1
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    • pp.105-111
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    • 2024
  • The SLA (Stereolithography Apparatus) method is a type of 3D printing technique predicated on the transformation of liquid photocurable resin into a solid form through UV laser exposure, and its application is increasing in various fields. In this study, we conducted research to enhance the hydrophobicity and transparency of SLA 3D printing surfaces for microfluidic system production. The enhancement of surface hydrophobicity in SLA outputs was attainable through the application of hydrophobic coating methods, but the coating durability under different conditions varied depending on the type of hydrophobic coating. Additionally, to simultaneously achieve the required transparency and hydrophobic properties for the fabrication of microfluidic systems, we applied hydrophobic coatings to the proposed transparency enhancement method from prior research and compared the changes in contact angles. Teflon coating was proposed as a suitable hydrophobic coating method for the fabrication of microfluidic systems, given its excellent transparency and high coating durability in various environmental conditions, in comparison to titanium dioxide coating. Finally, we produced an Electrophoresis of Charged Droplet (ECD) chip, one of the digital microfluidics systems, using SLA 3D printing with the proposed Teflon coating method (Fluoropel 800). Droplet manipulation was successfully demonstrated with the fabricated chip, confirming the potential application of SLA 3D printing technology in the production of microfluidic systems.

A microcomputer controlled alignment system using moire sensors

  • Takada, Yutaka;Seike, Yoshiyuki;Uchida, Yoshiyuki;Akao, Yasuo;Yamada, Jun
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10b
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    • pp.1961-1965
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    • 1991
  • This paper deals with an automatic and precision alignment technique for proximity printing in x-ray lithography, using two pairs of moire gratings, with moire signals from each pair being 180.deg. out of phase with each other. We constructed an automatic and precision alignment experimental system which could measure both transmitted moire signals and reflected moire signals at the same time. The automatic alignment was achieved using transmitted moire signals and also reflected moire signals as a control signal for a stage driver. The alignment position of the system was monitored not only by a control signal but also by a non-control signal. The effect of transmitted and reflected moire signals upon alignment accuracy was discussed. We concluded that the technique using diffracted moire signals is a viable automatic and precision alignment technique.

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Fabrication of Liquid Crystal Matrix Display (액정 매트릭스 표시기의 제작)

  • Bae, Jeong-Ryeol;An, Hyeong-Geun;Gwon, Yeong-Se
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.20 no.5
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    • pp.16-22
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    • 1983
  • Liquid crystal matrix display is fabricated. ITO transparent electrode and silver paste metal electrode are coated on glad substrate using silk screen printing technique, and SiO is coated on the transparent electrode by evaporation. Liquid crystal molecules are aligled by rubbing technique and displays of Alphanumeric and Hangul are tried using the dynamic scattering effect and the 3: 1 selection method.

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Development of digital textile design using marbling dyeing technique and Photoshop for DTP (포토샵을 이용하여 공예적 기법인 마블링 패턴을 DTP 출력용 텍스타일 디자인으로 개발)

  • Kim, Sin-Hee
    • Journal of Fashion Business
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    • v.13 no.2
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    • pp.115-122
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    • 2009
  • Marbling dyeing technique shows beautiful flowing pattern because the pattern is transferred to the medium by the pigments floating onto the viscous solution base. However, this marbling pattern does not have any reproducibility and the result of accidental pattern formation. Marbling process contains many complicated procedures such as making marbling base, mordanting the medium, and bubble removal with size limitation. Computer changed the many aspects in textile design and digital technique is used in many design production. However, it is impossible to produce marbling pattern with digital drawing. In this research, the digital textile design starting from marbling pattern was developed for digital textile printing. Marbling was done to produce the initial motifs and scanned. Several marbling media such as silk, polyester, and paper were used. Photoshop was used to process and develop textile design based on these marbling motifs. One repeat was developed and various colorways were tried. The developed textile design were printed using DTP.

The Study on Technique and Design Appeared in Textile of Miaos in China (중국내 묘족의 직물에 나타난 기법과 문양 고찰)

  • 부애진;홍정민
    • Journal of the Korean Society of Costume
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    • v.37
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    • pp.149-162
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    • 1998
  • This study is thed Embroidery, Cross-stitchery, Weaving, Wax-Printing of technique and design appeared in textile of Miaos dwells in south-west among the minority people of china. The study is as follows. First, the technique of textile1) satin stitch, couching stitch, french-knot stitch, etc. using anther silk thread or cotton thread color 2) cross-stitchery 3) hand-weaving technique which is shaped other warp or weft using simple loom 4) the technique of dyeing of pattern using effect with wax. These methods are singly used mixing together, therefore doubled beauty. Second, these technuque of ornament have other independence, specially ornament apron, sling, sleeve borders, slack borderss, edge of upper garment, take off and put on easily, heighten effect of various ornament, can preserve many years. Third, Maker, female born in this country fashion by need of herself, used liberal method shown in unique creativity of life. This texture make standards capable female proud of intelligent and skill of herself. Fourth, Design appeared in textile like as pattern flying bird in the sky, strolling beast in the field, lion rolling gem, laughing dragon winding snake at gem, birks, flowers, fish, butterfly is used as the wish of long life, a lucky sign. They expressed creativity and unique conception using formation : the technique transform other shape using by omitting or adding or overestimating. Geometric pattern of tartan, revealing, Fifth, composition structure having balance and symmetry or contradiction towards center and circumstance of the center harmonized repeatedly method, expressed unique artful attraction by full composition.

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Nanoliter Reactor Arrays for Antibiotic Study

  • Park, Jin-Won
    • Bulletin of the Korean Chemical Society
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    • v.28 no.10
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    • pp.1709-1714
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    • 2007
  • It is demonstrated in this study that the nanoliter reactor arrays with an inkjet printing, can be used for high throughput screen of antibiotic function. As a model antibiotic, gramicidin was used in this study. The gramicidin embedded lipid vesicles were immobilized on the surface in the nanoliter reactor structure with control of the volume in the nanoliter reactor. By dispensing acidic drops into the reactor, the gramicidin function was monitored. The technique developed in this research also has a great potential to be used for discovery of drugs.

Printed polymer and a-Si TFT backplanes for flexible displays

  • Street, R.A.;Wong, W.S.;Ready, S.E.;Chabinyc, M.L.;Arias, A.C.;Daniel, J.H.;Apte, R.B.;Salleo, A.;Lujan, R.;Ong, Beng;Wu, Yiliang
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07a
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    • pp.697-699
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    • 2005
  • The need for low cost flexible TFT display backplanes has focused attention on new processing techniques and materials. We have developed backplane technology based entirely on jet-printing, using a combination of additive and subtractive processing, and have applied this technique to both amorphous silicon and polymer TFT arrays.

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Fabrication of OTFT-backplane with solution process for Electrophoretic Display panel

  • Lee, Myung-Won;Lee, Mi-Young;Park, Jong-Seung;Song, Chung-Kun
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.428-430
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    • 2009
  • We fabricated flexible OTFT-backplanes with combining printing technique and conventional photolithography process for the electrophoretic display(EPD). The active area size of backplane was 6" in diagonal direction and consisted of $192{\times}150$ pixels, containing 1 OTFT employed bottom contact structure and 1 capacitance in each pixel.

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