• 제목/요약/키워드: Compensation film

검색결과 131건 처리시간 0.026초

STUDY OF MULTILAYER STRUCTURE USING X-RAY DOUBLE CRYSTAL DIFFRACTION

  • Wu, Yunzhong;Xu, Xueming;Wang, Weiyuan
    • 한국진공학회지
    • /
    • 제4권S2호
    • /
    • pp.30-33
    • /
    • 1995
  • By using X-ray double crystal diffraction technique the multilayer structure composed of glass membrane, platinum film and $\alpha Al_2O_3$ substrate has been studied. It is found the stress is produced in the film by thermal mismatch within multilayer materials. The measuring results of thin film platinum resistors show that the stress were induce resistance change of device and different stress status will produce add resistance in different direction. Selecting proper glass material can make opposite stress in Pt film and opposite add resistance due to thermal mismatch. The reliability of Pt resistor has been improved with method of this stress compensation.

  • PDF

Cu-Ni 박막 스트레인 게이지를 이용한 다이어프램식 압력 센서-II:압력 센서의 설계 제작의 특성 (Diaphragm-Type Pressure Sensor with Cu-Ni Thin Film Strain Gauges-II : Design Fabrication and Characteristics of a Pressure Sensor)

  • 민남기;전재형;박찬원
    • E2M - 전기 전자와 첨단 소재
    • /
    • 제10권10호
    • /
    • pp.1022-1028
    • /
    • 1997
  • In this paper we present the construction details and output characteristics of a diaphragm-type pressure sensor with Cu-Ni(53:47) thin-film strain gauges. In order to improve the sensitivity and the temperature compensation two circumferential gauges are placed near the center of the diaphragm and two radial gauges are located near the edge. For all the gauges the relative change in resistance ΔR/R with pressure is of the order 10$^{-3}$ for the maximum pressure. The output is found to be linear over the entire pressure range(0-30kfg/cm$^2$)and the output sensitivity obtained is 1.6mV/V. The maximum nonlinearity observed in output characteristics is 0.35%FS for 5V excitation and the hysteresis is less than 0.1%FS.

  • PDF

Effect of Out-of-plane Retardation of Substrate Film on the Viewing-angle Dependence of Transmittance in a Display Device

  • Ahn, Sumin;Lee, Ji-Hoon
    • Current Optics and Photonics
    • /
    • 제5권1호
    • /
    • pp.45-51
    • /
    • 2021
  • The effect of the out-of-plane retardation (Rth) of a substrate film on the viewing-angle dependence of transmittance (TR) in a display device was investigated. When the polarization state of input light deviates from the transmission axis of the polarizer, Rth of the substrate film induces inhomogeneous viewing-angle dependence of TR. The inhomogeneity of TR gets worse for greater values of of Rth. The inhomogeneous TR profile can be eliminated by inserting compensation films, which convert the input polarization state to the linear polarization state parallel to the transmission axis of the polarizer.

위상지연판 접합 편광필름의 광학적 고찰 및 결함 검출 방안 (Optical Investigation and Defect Detection Methods in Polarizing Film on Phase Delay Plates)

  • 주영복;허경무
    • 반도체디스플레이기술학회지
    • /
    • 제20권4호
    • /
    • pp.55-61
    • /
    • 2021
  • In this paper, we proposed and implemented defect detection methods of polarized film with half-wave phase retardation plates. We investigated the principles of phase retardation compensation and optical principle of half-wave phase retardation plates. We analyzed of samples of polarized film with half-wave phase retardation plates. The optical defect detection methods are proposed and the performance is validated with experiments.

Compensation for Liquid Crystal

  • Jea-Claude, Lehureau;Laure, Lee Mane Si
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2003년도 International Meeting on Information Display
    • /
    • pp.1104-1107
    • /
    • 2003
  • Normally white TN-LCD is the preferred solution in active matrix display thanks to easy production, fast response and good white balance. However, it is has poor viewing angle properties and correction films are difficult to design. We present the mathematics of designing a compensating film and discuss various technological solutions for making

  • PDF

Trend of Wide Viewing Angle Technology

  • Hong, Hyung-Ki;Shin, Hyun-Ho
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2000년도 제1회 학술대회 논문집
    • /
    • pp.7-8
    • /
    • 2000
  • We compared various LCD modes for wide viewing angle. These modes can be classified as film-compensation, multi-domain, IPS. So far, IPS and multi-domain VA represent best performance. The performance gap with respect to CRT is diminishing.

  • PDF

광학적 두께 제어 방법에 따른 광학박막필터의 에러보상효과에 대한 비교 (Comparison of Optical Monitoring Methods for Deposition of the Optical Thin-film Filters)

  • 정성구;황보창권
    • 한국광학회:학술대회논문집
    • /
    • 한국광학회 2008년도 하계학술발표회 논문집
    • /
    • pp.207-208
    • /
    • 2008
  • In this study, we present the error compensation effect of optical monitoring methods for apply of narrow band pass filter and IR-cutoff filter. Then we show the optimization process for apply of optical monitoring methods.

  • PDF

Fringe-Field 구동형 새로운 반투과형 수평 배향 액정 디스플레이 (A Novel Transflective Homogeneously Aligned Liquid Crystal Display Driven by Fringe-Field)

  • 정태봉;이승희
    • 한국전기전자재료학회논문지
    • /
    • 제16권6호
    • /
    • pp.501-509
    • /
    • 2003
  • We have designed transflective liquid crystal display(LCD) associated with in-plane switching of a LC director driven by fringe-field, unlike other LCD mode. Reflective area consists of a λ/2 compensation film and a LC cell with retardation value(dΔn) of λ/4 with their optic axes making an angle of 15$^{\circ}$ and 75$^{\circ}$ against polarizer, respectively. In the transmissive area, top and bottom polarizers are parallel each other, an LC has a dΔn of λ/2, and another λ/2 compensation film is inserted between the LC cell and bottom polarizer. With the configuration, both devices show dark state initially. When an incident light is 550nm, the device shows wide-viewing-angle characteristics such that in the reflective area the contrast ratio target than 5 exists up to 55$^{\circ}$ of polar angle in all directions and in transmissive area it exists about 100$^{\circ}$ in vortical direction and 110$^{\circ}$ in horizontal direction.

Biaxial integrated optical film for VA mode LCD's made from in-situ photopolymerised reactive mesogens.

  • Kim, Kyeong-Hyeon;Lyu, Jae-Jin;Chung, Dong-Hoon;Verrall, M.;Slaney, K.;Perrett, T.;Parri, O.;Lee, Seung-Eun;Lee, Hee-Kyu
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
    • /
    • pp.773-775
    • /
    • 2004
  • For high end, large area displays, all current LC modes require some degree of optical compensation to improve the front of screen viewing experience. Currently most optical films are laminated to the outside of the LCD cell, between the glass and polariser. In this paper we wish to show how it is possible to integrate the compensating optical film within a VA mode LCD cell. The paper will describe the process of making the biaxial film through the process of in-situ photopolymerisation of an aligned film of reactive mesogens in the cholesteric phase using polarised UV light. The film can be made on the colour filter array side of the LCD panel. In addition the process of fabricating a VA mode LCD containing this film will be described and the performance of this module will be presented

  • PDF

Biaxial Integrated Optical Film for VA Mode LCD's Made from In-situ Photopolymerised Reactive Mesogens

  • Kim, Kyeong-Hyeon;Lyu, Jae-Jin;Chung, Dong-Hoon;Verrall, M;Slaney, K;Perrett, T;Parri, O;Lee, Seung-Eun;Lee, Hee-Kyu
    • Journal of Information Display
    • /
    • 제5권2호
    • /
    • pp.23-26
    • /
    • 2004
  • For high end, large area displays, all current LC modes require some degree of optical compensation to improve the front of screen viewing experience. Currently most optical films are laminated to the outside of the LCD cell, between the glass and polariser. In this paper we wish to show how it is possible to integrate the compensating optical film within a VA mode LCD cell. The paper will describe the process of making the biaxial film through the process of in-situ photopolymerisation of an aligned film of reactive mesogens in the cholesteric phase using polarised UV light. The film can be made on the colour filter array side of the LCD panel. In addition the process of fabricating a VA mode LCD containing this film will be described and the performance of this module will be presented.