• 제목/요약/키워드: Display Characterization

검색결과 316건 처리시간 0.03초

Fabrication and Characterization of Dielectric Materials of Front and Back Panel for PDP

  • Chang, Myeong-Soo;Pae, Bom-Jin;Lee, Yoon-Kwan;Ryu, Byung-Gil;Park, Myung-Ho
    • Journal of Information Display
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    • 제2권3호
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    • pp.39-43
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    • 2001
  • The glass compositions of $PbO-SiO_2-B_2O_3$ system and $P_2O_5-PbO-ZnO$ system for the transparent dielectric materials for front panel and $P_2O_5$-ZnO-BaO and $SiO_2-ZnO-B_2O_3$ for the reflective dielectric materials for back panel of PDP (Plasma Display Panel) were investigated. As a result, transparent dielectric materials for front panel showed good dielectric properties, high transparency, and proper thermal expansion matching to soda lime glass substrate. And the reflective dielectric layers for back panel were prepared from two series of parent glass and oxide filler. It was found that these glassceramics are useful materials for dielectric layers in PDP device, as they have similar thermal expansion to soda-lime glass plate, high reflectance, and low sintering temperature. In particular, the addition of $BPO_4$ and $TiO_2$ as fillers to $SiO_2-ZnO-B_2O_3$ system is considered to be the most effective for acquiring good properties of lower dielectric layer for PDP device.

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Synthesis and characterization of negative-type photosensitive polyimides for TFT-LCD array

  • Kim, Hyo-Jin;Kim, Hyun-Suk;Kim, Soon-Hak;Park, Lee-Soon;Hur, Young-Hune;Lee, Yoon-Soo;Song, Gab-Deuk;Kwon, Young-Hwan
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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    • pp.1625-1628
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    • 2006
  • Two different negative-type photosensitive polyimides were synthesized and characterized for an application as an interdielectric layer in TFTLCD array. In the case of photocurable polyimides, the photosensitive moiety, 2-HHSP, was synthesized through 3 step reaction, and then was incorporated into side chains of polyimide precursor by post reaction. Optimum compositions of negative-type photocurable polyimde were also formulated. For photopolymerizable polyimides, two novel UV monomers containing imide linkages were prepared. An aqueous alkaline developable polymer matrix was synthesized by free radical copolymerization. A negative photoresist formulation was developed utilizing synthesized UV monomers containing imide linkage, photoinitiator, UV oligomer, and alkali developable polymer matrix. It was found that viaholes with good resolution, high transmittance and thermal resistance could be obtained by photolithographic process utilizing the negative-type photoresist formulations.

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Novel deposition technology for nano-crystalline silicon thin film at low temperature by hyper-thermal neutral beam assisted CVD system

  • Jang, Jin-Nyoung;Song, Byoung-Chul;Oh, Kyoung-Suk;Yoo, Suk-Jae;Lee, Bon-Ju;Choi, Soung-Woong;Park, Young-Chun;Hong, Mun-Pyo
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.1025-1027
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    • 2009
  • Novel low temperature deposition process for nano-crystalline Si thin film is developed with the hyper-thermal neutral beam (HNB) technology. By our HNB assisted CVD system, the reactive particles can induce crystalline phase in Si thin films and effectively combine with heating effect on substrate. At low deposition temperature under $80^{\circ}C$, the HNB with proper incident energy controlled by the reflector bias can effectively enhance the nano-crystalline formation in Si thin film without any additional process. The electrical properties of Si thin films can be varied from a-Si to nc-Si according to change of HNB energy and substrate temperature. Characterization of these thin films with conductivity reveal that crystalline of Si thin film can increase by assist of HNB with appropriate energy during low temperature deposition. And low temperature prcoessed nc-Si TFT performance has on-off ratio as order 5.

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Approach towards qualification of TCP/IP network components of PFBR

  • Aditya Gour;Tom Mathews;R.P. Behera
    • Nuclear Engineering and Technology
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    • 제54권11호
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    • pp.3975-3984
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    • 2022
  • Distributed control system architecture is adopted for I&C systems of Prototype Fast Breeder Reactor, where the geographically distributed control systems are connected to centralized servers & display stations via switched Ethernet networks. TCP/IP communication plays a significant role in the successful operations of this architecture. The communication tasks at control nodes are taken care by TCP/IP offload modules; local area switched network is realized using layer-2/3 switches, which are finally connected to network interfaces of centralized servers & display stations. Safety, security, reliability, and fault tolerance of control systems used for safety-related applications of nuclear power plants is ensured by indigenous design and qualification as per guidelines laid down by regulatory authorities. In the case of commercially available components, appropriate suitability analysis is required for getting the operation clearances from regulatory authorities. This paper details the proposed approach for the suitability analysis of TCP/IP communication nodes, including control systems at the field, network switches, and servers/display stations. Development of test platform using commercially available tools and diagnostics software engineered for control nodes/display stations are described. Each TCP link behavior with impaired packets and multiple traffic loads is described, followed by benchmarking of the network switch's routing characteristics and security features.

습식화학법을 이용한 고순도 석영유리 기판 제조 및 특성평가 (Preparation and Characterization of High-purity Quartz Panel Using Wet-chemical Method)

  • 박성은;남병욱;안정숙;신지식;오한석
    • 반도체디스플레이기술학회지
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    • 제6권4호
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    • pp.33-38
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    • 2007
  • Quartz glass panel was prepared by a colloidal silica through the heat-treatment only without any additives in wet-chemical method. This colloidal silica used in slurry process has the uniform distribution of particle size and lower cost. The results show that 6N as a degree of purity and the 86 percentage of violet transmittance in 1mm thickness. AFM(Atomic Force Microscopy) pattern shows that the surface roughness are less than lnm. Also, we investigated the characteristic of quartz panel according to the concentration and distribution of hydroxyl group, viscosity and thermal expansion coefficient.

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디스플레이 특성화과정에서 감마변화를 이용한 컬러이미지 재현에 관한 연구 (A Study on Reproduction of Color Image using Gamma Variation on Display Colorimetric Characterization)

  • 이성철;조가람;구철회
    • 한국인쇄학회지
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    • 제23권1호
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    • pp.1-11
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    • 2005
  • The propose of this study investigated the reproduction of color image on a CRT monitor, for a range of different values of monitor gamma. We have used the GOG(gain-offset-gamma) model of the behavior of CRT. Color difference have been computed in a color space, based on the CIELAB color appearance model. The 133 patch defined linearly color sample and 24 patch defined printing color target were used, and were subjected to the influence of nine different gamma value. The result shows that netural color is increasing the decrease range of luminance black color than white color. These results concern correct in the context display of color reproduction.

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Study on orientation distribution of discotic liquid crystal in compensating film for viewing angle improvement of liquid crystal displays

  • Ryu, J.W.;Shin, Y.S.;Kim, Y.K.;Kim, S.Y.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.879-882
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    • 2008
  • The discotic liquid crystal in compensating film used for the viewing angle improvement of the twist nematic liquid crystal display panel is analyzed. For the optical characterization of the compensating film, we measured the polarization state of the light passing through the film as the tilt angle and the azimuth angle of the film were varied, and then we compared the measured polarization state with the calculated one. Finally we suggested the best fit configuration of the discotic liquid crystal.

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Characterization of Motion Interpolation in 120Hz Systems

  • Shin, Byung-Hyuk;Kim, Kyung-Woo;Park, Min-Kyu;Berkeley, Brian H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.681-684
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    • 2008
  • Motion interpolation is adopted and has been spread widely into market since it is effective in reducing motion blur, which is considered as weak characteristic due to slow response time of liquid crystal and hold-type display. 120Hz driving using interpolated frames achieves better moving picture quality with less motion blur and less motion judder. However, errors in the interpolated frames can cause visual artifacts such as static text breakup, halos, and occlusions. This paper focuses on categorizing characteristics of visual artifacts and on reducing side-effects by using information from original frames in special cases.

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Characterization of instability in a-Si:H TFT LCD utilizing copper as electrodes

  • Kuan, Yung-Chia;Liang, Shuo-Wei;Chiu, Hsian-Kun;Sun, Kuo-Sheng
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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    • pp.747-751
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    • 2006
  • The hydrogenated amorphous silicon thin film transistor (a-Si:H TFT) with copper as source and drain electrode has been fabricated to obtain its transfer characteristics and stressed with positive and negative bias to investigate the instability variation comparing to conventional MoW-Al based TFT device. The results show that there is no copper diffusion into active layer of a-Si:H TFT, even during the thermal process. In addition, a 15-inch XGA a Si:H TFT LCD display utilizing Cu as gate electrodes has been developed.

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Characterization of Aluminum Oxide Thin Film Grown by Atomic Layer Deposition for Flexible Display Barrier Layer Application

  • Kopark, Sang-Hee;Lee, Jeong-Ik;Yang, Yong-Suk;Yun, Sun-Jin
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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    • pp.746-749
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    • 2002
  • Aluminum oxide thin films were grown on a poly ethylene naphthalate (PEN) substrate at the temperature of 100$^{\circ}C$ using atomic layer deposition method. The film showed very flat morphology and good adhesion to the substrate. The visible spectrum showed higher transmittance in the range from 400 nm to 800 nm than that of PEN. The water vapor transmission value measured with MOCON for 230nm oxide-deposited PEN was 0.62g/$m^2$/day @ 38$^{\circ}C$, while that of PEN substrate was 1.4g/$m^2$/day @ 38$^{\circ}C$.

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