• Title, Summary, Keyword: Liquid crystal display

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Modeling an e-Beam Addressed Liquid Crystal Projection Display

  • Yang, Deng-Ke;Zhou, Fushan;Molitor, R.J.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.930-932
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    • 2002
  • We have carried a theoretical study on e-beam addressed liquid crystal projection display in which the liquid crystal is switched by the electric field of the charge, produced by an electron beam, on the surface of the display. We calculated the electric field produced by the surface charge, the liquid crystal director configuration and the profile of the transmitted light. We studied the factors affecting the resolution of the display. We also studied the effect of pretilt angle on the performance of the display. The e-beam addressed liquid crystal projection display potentially has the advantages of high resolution and high brightness.

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Simulation Study of an e-Beam Addressed Liquid Crystal Display for Projection

  • Zhou, Fushan;Yang, Deng-Ke;Molitor, R.J.
    • Journal of Information Display
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    • v.3 no.4
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    • pp.8-12
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    • 2002
  • We have carried out a simulation study on an e-beam addressed liquid crystal projection display in which the liquid crystal is switched by the electric field of the charge, produced by an electron beam, on the surface of the display. We calculated the electric field produced by the surface charge, the liquid crystal director configuration and the profile of the transmitted light. We studied the factors affecting the resolution of the display and the effect of pretilt angle on the performance of the display. The e-beam addressed liquid crystal projection display potentially has the advantages of high resolution and high brightness.

Blue-white Reflective Cholesteric Liquid Crystal Displays by Single Liquid Crystal Layer

  • Choi, Woon-Seop;Lee, Hee-Jeong
    • Transactions on Electrical and Electronic Materials
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    • v.9 no.6
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    • pp.251-254
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    • 2008
  • Blue-white reflective cholesteric liquid crystal display was prepared by a unique method of single liquid crystal layer, the combination of yellow color liquid crystal and blue color backplane. The dopant and host combination of chlolesteric liquid crystal affects the color spectrum. The CIE chromaticity coordinates of blue and white are (0.10, 0.16) and (0.29, 0.30), respectively. The relatively low driving voltages of 32 V for blue-white display are obtained.

Black-white Reflective Liquid Crystal Display Prepared with Two Color Reflective Layers

  • Choi, Woon-Seop;Kim, Min-Kyu
    • Transactions on Electrical and Electronic Materials
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    • v.10 no.1
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    • pp.20-23
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    • 2009
  • Black-white reflective cholesteric liquid crystal display was prepared with two color liquid crystal layers, the combination of yellow color liquid crystal and blue color liquid crystal. The rubbing of cholesteric liquid crystal panel affects the brightness and color spectrum due to increase the planar domain texture. The CIE chromaticity coordinate of white is (0.31, 0.31).

Effect of Contamination of Liquid Crystal by Spilled Components from Color Filter

  • Kim, Young-Seok;Lee, Jeong-No
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1469-1471
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    • 2009
  • Effect of contamination of liquid crystal on the electrical behavior of liquid crystal display (LCD) by spilled components from color filter layer was investigated. It is noted that the level of contamination was different following the kind of liquid crystal and organic layers. Transmittance curve of LCD cell was shifted by spilled components of color filter and BM materials. C-V curve also showed different behavior following color filter type. The results obtained show the image sticking of LCD can be varied by pairing liquid crystal with color filter materials.

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Liquid Crystal Modes for Display Applications (디스플레이 응용을 위한 액정 모드)

  • Kim, Jung-Wook;Yoon, Tae-Hoon
    • Korean Journal of Optics and Photonics
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    • v.24 no.4
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    • pp.168-175
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    • 2013
  • An information display device is a key component in the information society. A liquid crystal display is the most widely used among information display devices. However, its performance still needs to be improved in order to survive in competition with other information display devices. In this paper, we explain the structure and the operation principle of a liquid crystal display device and introduce our recent research activities on liquid crystal mode technology.

Vertical Alignment Nematic Liquid Crystal Display with Patterned Electrode Using Positive Liquid Crystal Materials

  • Shin, Hun-Ki;Yoon, Tae-Hoon;Kim, Jae-Chang
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.499-501
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    • 2007
  • We propose a vertical-alignment liquid crystal display with patterned electrodes using a positive dielectric anisotropic liquid crystal. In this structure, the threshold and on-state voltages are reduced compared with previous vertical-alignment configuration with positive liquid crystal.

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Shearing and Electro-optical Properties of Stressed Cholesteric Liquid Crystal Cells

  • Lee, Jung-Min;Kang, Dae-Seung
    • Journal of Information Display
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    • v.11 no.2
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    • pp.91-93
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    • 2010
  • The shearing effects on the electro-optical properties of a stressed cholesteric liquid crystal were investigated. A photopolymer was dispersed in the cholesteric liquid crystal cell. By carefully choosing the mixing ratio between the liquid crystal and the photoreactive monomer, and by applying suitable mechanical shearing on the substrates, a cholesteric liquid crystal display with a low threshold voltage and no alignment layer was demonstrated.

Study of Properties of High-K Strontium Oxide Alignment Layer Using Solution Process for Low Power Mobile Information Device (저전력 휴대용 통신단말을 위한 Solution Process를 이용한 고 유전율 Strontium Oxide 배향막의 특성 연구)

  • Han, Jeong-Min;Kim, Won-Bae
    • Journal of Satellite, Information and Communications
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    • v.10 no.2
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    • pp.90-94
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    • 2015
  • We stuidied liauid crystal alignment treatment using solution process for making thin oxide layer in liquid crystal display. It is the one of very effient and popular process in making thin oxide layer in electronical industrial fields. Particularly, this process has highly potential value in liquid crystal display industrial fields because it cause automatically induced alignment process without tranditional alignment process in liquid crystal alignment process. We made several different kinds of mol density solutions using strontium oxide solution. And those solutions were treated for solidification layers using annealing process for 2 hours. And we stuided pretilt angle properties of these alignment layers of strontium oxide for clarifying the relationship of liquid crystal molecules and thin strontium oxide layer. And we also tested the existence of strontium oxide thin layer on substrate using XPS measurement. We expected the hig gain of electro-optical properties in liquid crystal display using strontium oxide thin layer because it has high K property material than the other metal-based oxide layers. In this results, we measured 1.447 to 1.613 thresholds volts as 0.1 mol to 0.4 mol density in 0.1 mol density steps. This is significant better characteristics than conventional liquid crystal display as higher than 1.85 thresholds volts. And it make possible to making next-generation liquid crystal display which present low-power consumption and wide gray scale in liquid crystal display.

Advanced LC Development for LCD TV Application

  • Tarumi, Kazuaki;Klasen-Memmer, Melanie
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.757-761
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    • 2004
  • Flat Panel Display (FPD) application of Television (TV) application is booming. Liquid Crystal Display (LCD) is forecasted to play a dominant role for TV application in next years. We review in this presentation LC material development for LCD TV application.

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