• 제목/요약/키워드: Flat panel display

검색결과 447건 처리시간 0.029초

평판형 디스플레이 적용을 위한 내장형 Multiple U-Type 안테나를 이용한 유도결합형 플라즈마에 관한 연구 (Characteristics of Inductively Coupled Plasma with a Multiple U-Type Internal Antenna for Flat Panel Display Applications)

  • 임종혁;김경남;염근영
    • 한국진공학회지
    • /
    • 제15권3호
    • /
    • pp.241-245
    • /
    • 2006
  • 본 연구에서는 대면적 플라즈마 공정에 적용 가능한 고밀도 플라즈마를 발생시키기 위하여 기존의 내장형 serpentine-type 안테나와 새롭게 고안된 내장형 유도결합형 multiple U-Type 안테나를 1020mm X 920mm(기판 880 X 660mm)의 챔버에서 연구하였다. 내장형 유도결합형 multiple U-type을 적용한 플라즈마는 serpentine-type과 비교하여 더 높은 플라즈마 밀도, 높은 radical 밀도, 좋은 균일도를 관찰할 수 있었다. 이는 serpentine-type의 경우와 비교하여 보다 적은 정상파 효과와 높은 유도결합에 기인한다. 내장형 유도결합형 multiple U-type 안테나의 적용으로 $2\times10^{11}/cm^3$의 높은 플라즈마 밀도를 얻을 수 있었고 5000W의 입력전압과 Ar 가스 15mTorr 공정압력조건에서 4%의 균일도를 관찰할 수 있었다.

Magnetic soft mold를 이용한 나노 와이어 그리드 편광 필름 연구 (A study on the Nano Wire Grid Polarizer Film by Magnetic Soft Mold)

  • 조상욱;장성환;최두선;허석환;정명영
    • 마이크로전자및패키징학회지
    • /
    • 제21권2호
    • /
    • pp.85-89
    • /
    • 2014
  • 본 연구에서는 자기 소프트 몰드를 이용하여 피치 143.59 nm의 고 성능 NWGP(Nano Wire Grid Polarizer) 필름의 새로운 제조 방법을 제안하였다. 제작된 편광필름은 $6cm{\times}6cm$의 PET기판위에 알루미늄 격자 구조를 가지고 있으며, 이는 TFT-LCD(Thin Flat Transistor Liquid Crystal Display)에 응용 가능할 것으로 보인다. 자기 소프트 몰드는 너비 70.39 nm의 규격으로 제작되었으며, 이를 이용하여 2단계의 복제과정을 거쳐 제작되어진다. 이를 통해 본 연구에서는 기판위에 75.68 nm 선폭과 64.76 nm의 높이 143.59 nm pitch를 가지는 격자구조의 NWGP 패턴을 제작하였다. 또한, 이는 800 nm 파장 영역 대에서 75%의 최대 투과율과 10%의 최소 투과율을 가지는 것을 확인하였다. 따라서, 본 공정을 통해 독창적인 저 비용의 나노패터닝 기술로 디스플레이 산업에서 적용되어 질 것으로 보여진다.

증착두께 및 산소도입속도가 IZO 필름의 전기 및 광학적 특성에 미치는 영향 (Effects of Deposition Thickness and Oxygen Introduction Flow Rate on Electrical and Optical Properties of IZO Films)

  • 박성환;하기룡
    • 공업화학
    • /
    • 제21권2호
    • /
    • pp.224-229
    • /
    • 2010
  • Transparent conducting oxide (TCO) 박막은 평판 디스플레이 산업에 널리 사용되고 있다. 화학적으로 우수한 투명전도성 Indium Zinc Oxide (IZO) 필름은 Indium Tin Oxide (ITO) 필름의 대체 물질로 관심을 끌고 있다. 본 연구에서는 90 : 10 wt%의 $In_2O_3$와 ZnO를 혼합하여 만든 타겟으로 전자빔 증착법을 이용하여 polynorbornene (PNB) 기판 위에 IZO 박막을 제조하였다. UV/Visible spectrophotometer, 4-Point Probe를 이용하여 증착 두께와 산소도입 속도에 따른 IZO 필름의 전기적 및 광학적 특성을 연구하였으며, SEM, XRD 및 XPS를 이용하여 증착된 IZO의 구조적 특성 및 표면조성비를 연구하였다.

Single layer antireflection coating on PET substrates for display applications

  • Gowtham, M.;Mangalaraj, D.;Seo, Chang-Ki;Shim, Myung-Suk;Hwang, Sun-Woo;Yi, Jun-Sin
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
    • /
    • pp.988-991
    • /
    • 2004
  • In the present investigation, we tried AR coating simulation by using the "Essential Macleod optical coating design and analysis" program. After various run of the program we selected appropriate materials which have specific refractive indices and for that thickness was optimized to get the low reflectance. By comparing the simulated results for the different materials,we found that $SiO_2$ and TiN are the appropriate materials for this Flat panel device (FPD) application. Thin films of these materials were deposited using RF magnetron sputtering and Inductively Coupled Plasma Chemical Vapour Deposition (ICPCVD) methods on Polyethyleneterephthalate (PET) substrates. Spectroscopic ellipsometer (SE MF-1000) and UV-Vis spectrophotometer (SCINCO) were used for the optical characterization. The obtained experimental results are in good agreement with the simulation results.

  • PDF

LCD 모니터를 위한 개선된 콘트라스트 제어 방식 (An Improved Contrast Control Method for LCD Monitor)

  • 김철순;곽경섭
    • 한국멀티미디어학회논문지
    • /
    • 제5권6호
    • /
    • pp.609-615
    • /
    • 2002
  • 본 논문은 LCD 모니터 상에서 영상 향상을 위한 콘트라스트 제어방식을 제안하였다. 제안한 방식은 입력되는 필드 혹은 프레임 중에서 화소의 최대 값과 최소 값을 판별하고 이를 이용하여 화면의 개선 정도를 결정한다. 필드 또는 프레임의 메모리가 필요하지 않고, 기존의 방식에 비해 하드웨어 구성이 간단하여 실시간 처리를 요하는 분야에 쉽게 적용 가능하다 또한 입력되는 콘트라스 영역의 가중치 값을 변화시킴으로써 콘트라스트 제어가 가능하다 제안한 방법은 콘트라스트 제어 알고리즘과 룩업 테이블을 이용한 영상의 모드에 따라선택적으로 가중치 기울기를 구간별로 달리하여 개선된 영상을 얻는다. 제안한 다계조 콘트라스트 제어 방식을 컴퓨터 시뮬레이션을 통하여 검증하였으며, 시뮬레이션을 통해 영상을 확인하였다.

  • PDF

Development of MEMS based Piezoelectric Inkjet Print Head and Its Applications

  • Shin, Seung-Joo;Lee, Hwa-Sun;Lee, Tae-Kyung;Kim, Sung-Jin
    • 한국재료학회:학술대회논문집
    • /
    • 한국재료학회 2010년도 춘계학술발표대회
    • /
    • pp.20.2-20.2
    • /
    • 2010
  • Recently inkjet printing technology has been developed in the areas of low cost fabrication in environmentally friendly manufacturing processes. Although inkjet printing requires the interdisciplinary researches including development of materials, manufacturing processes and printing equipment and peripherals, manufacturing a printhead is still core of inkjet technology. In this study, a piezoelectric driven DOD (drop on demand) inkjet printhead has been fabricated on three layers of the silicon wafer in MEMS Technology because of its chemical resistance to industrial inks, strong mechanical properties and dimensional accuracy to meet the drop volume uniformity in printed electronics and display industries. The flow passage, filter and nozzles are precisely etched on the layers of the silicon wafers and assembled through silicon fusion bonding without additional adhesives. The piezoelectric is screen-printed on the top the pressure chamber and the nozzle plate surface is treated with non-wetting coating for jetting fluids. Printheads with nozzle number of 16 to 256 have been developed to get the drop volume range from 5 pL to 80 pL in various industrial applications. Currently our printheads are successfully utilized to fabricating color-filters and PI alignment layers in LCD Flat Panel Display and legend marking for PCB in Samsung Electronics.

  • PDF

형광체 두께와 방전공간의 변화에 따른 ac PDP의 어드레싱 속도와 전기광학적 특성에 관한 연구 (The Study of Addressing Time and Electrical and Optical Characteristics as Phosphor Thickness and Height of discharge Space in ac-PDP)

  • 허정은;김규섭;박정후;조정수
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2000년도 하계학술대회 논문집 C
    • /
    • pp.1815-1817
    • /
    • 2000
  • Plasma display Panels(PDPs) are one of the leading technologies currently under development for large-area high-brightness flat panel displays. However, the luminance and luminous efficiency of at PDPs should be improved. Especially, one of the main factors affecting on the luminance and luminous efficiency of ac PDP may be the phosphor thickness and size of discharge space. In this study, we examined into addressing time, electrical and optical properties as a parameter of the phosphor thickness and the size of discharge space during the display period of ac PDP. It is found out that the optimum phosphor thickness was $50{\mu}m$ and height of discharge space was about $100{\mu}m$.

  • PDF

White-Light-Emitting Materials for Organic Electroluminescent Devices

  • Kim, Duck-Young;Kwon, Oh-Kwan;Kwon, Hyuck-Joo;Kim, Young-Kwan;Sohn, Byoung-Chung;Ha, Yun-Kyoung
    • 한국응용과학기술학회지
    • /
    • 제18권1호
    • /
    • pp.7-11
    • /
    • 2001
  • White emission is important for applying organic EL devices to full-color flat panel display and backlight for liquid crystal display. In order to obtain white emission, the use of a light-emitting material which shows the white emission by itself is advantageous for these applications because of its high reliability and productivity. A chelate-metal complex such as zinc bis(2-(2-hydroxyphenyl) benzothiazolate) ($Zn(BTZ)_{2}$ was known to emit white light with a broad electroluminescence. In this study, the electroluminescent characteristics of $Be(BTZ)_{2}$ and $Mg(BTZ)_{2}$, as well as $Zn(BTS)_2$ were investigated using organic electroluminescent devices with the structure of ITO/TPD/ $Be(BTZ)_{2}$, $Mg(BTZ)_{2}$, or $Zn(BTZ)_{2}/Al$. It was found that the device containing $Be(BTZ)_{2}$ showed the highest power efficiency.

용액공정을 이용한 열처리된 산화아연 박막의 투명한 박막 트랜지스터 구현을 위한 전사방법 개발 (Development of Transfer Method for Transparent Thin Film Transistor of Heat-treated Zinc Oxide Thin Film by Solution Process)

  • 권순열;정동건;최영찬;이재용;공성호
    • 반도체디스플레이기술학회지
    • /
    • 제17권2호
    • /
    • pp.57-60
    • /
    • 2018
  • Recently, Thin-film transistors (TFTs) are fundamental building blocks for state-of-the-art microelectronics, such as flat-panel displays and system-on-glass. Zinc oxide thin films have the advantage that they can grow at low temperature and can obtain high charge movility. Also the zinc oxide thin film can be used to control the resistance according to the oxygen content, so it is very easy to obtain the desired physical properties. In this paper, we fabricated a zinc oxide thin film on a polished copper substrate through a solution process, then improved the crystallinity through a geat treatment porcess, and studied to transfer it on a flexible substrate after the heat treatment was completed.

A Study on a Trend of Human Error Types Observed in a Simulated Computerized Nuclear Power Plant Control Room

  • Lee, Dhong Ha
    • 대한인간공학회지
    • /
    • 제32권1호
    • /
    • pp.9-16
    • /
    • 2013
  • Objective: The aim of this study is to investigate a trend of human error types observed in a series of verification and validation experiments for an Advanced Control Room(ACR) equipped with Lager Display Panel(LDP), Work Station Flat Panel Display(WS FPD), list type Alarm System(AS), Soft Control(SC) and Computerized Procedure System(CPS). Background: Operator behaviors in a fully computerized control room are quite different from those in a traditional hard-wired control room. Operators in an ACR all together monitor plant status and variables through their own interface system such as LDP and WS FPD, are notified of abnormal plant status through their own list type AS, control the plant through their own SC, and follow the structured procedure through their own CPS whereas operators in a traditional control room only separately do their duty directed by their supervisor. Especially the secondary task such as manipulating the user interface of ACR can be an extra burden to all the operators including the supervisor. Method: The Reason's human error classification method was applied to operators' behavioral data collected from a series of verification and validation experiments where operators showed their plant operational behaviors under a couple of harsh scenarios using the ACR simulator. Results: As operators accustomed to the new ACR system, knowledge or rule based mistakes appearing frequently in the early series of experiments decreased drastically in the latest stage of the series. Slip and lapse types of errors were observed throughout the series of experiments. Conclusion: Education and training can be one of the most important factors for the operators accustomed to the traditional control room to be adapted to the new system and to run the ACR successfully. Application: The results of this study implied that knowledge or rule based mistakes can be reduced by training and education but that lapse type errors might be reduced only through innovative improvement in human-system interface design or teamwork culture design including a new leadership style suitable for ACR.