• Title/Summary/Keyword: LCD

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Investigations of process factors in the sensitivity of embedded digital switching TSP

  • Han, Sang-Youn;Oh, Keun-Chan;Seong, Dong-Gi;Ham, Yeon-Sik;Lyu, Jae-Jin;Cho, Young-Je
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.1531-1534
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    • 2009
  • Effect of process factors on the sensitivity of inner-type digital switching TSP was analyzed. From these results, we have successfully fabricated inner-type digital switching TSP embedded in 3.2-inch WQVGA PLS mode LCD panel. During many factors, TFT sensor structure for reducing the PI thickness and a separation distance of $0.3{\mu}m$ between the conductive column spacer (C/S) and TFT sensor were essential. Glass thickness and main C/S density were also important factors. This technology can be applied to wide angle of view hand-held phones, personal digital assistants (PDAs), and tablet PCs.

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Motion Blur reduction based on Motion Compensation

  • Park, Jae-Hyeung;Kim, Yun-Jae;Park, Min-Kyu;Amino, Tadashi;Oh, Jae-Ho;Kim, Nam-Deog;Kim, Sang-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08a
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    • pp.413-416
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    • 2007
  • Motion-estimation/motion-compensation (ME/MC) provides superior motion picture quality but its huge computation load results in high cost. Impulsive driving is a cost-effective solution but it suffers from large flicker and brightness loss. Motion compensated impulsive driving technology has been developed to achieve high motion picture quality in a cost-effective implementation by combining ME/MC and impulsive driving. The key idea is to apply ME/MC or impulsive driving selectively according to the motion vector distribution of the incoming image sequence. In this paper, the description of the algorithm and the experimental results are provided.

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Electro-optical performance of TN-LCD using linearly polarized UV light irradiation on po1ymide surface (폴리이미드막에 직선편광된 자외선조사를 이용한 TN-LCD의 전기광학특성의 평가)

  • 서대식;이창훈;이정호;문학룡
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1998.06a
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    • pp.109-112
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    • 1998
  • In this paper, we studied on electro-optical (EO) characteristics of photo-aligned twisted nematic (TN)-LCD. We obtained that uniform LC alignment in TN-LCD with linearly polarized ultraviolet (LPUV) light irradiation on polyimide (PI) surface increases according to increasing irradiation time for 10 to 60 min. The voltage-transmittance and response time characteristics of photo-aligned TN-LCD with UV light irradiation time of 60 min were almost same in comparison with conventional TN-LCD were observed. From the results, we suggest that photo-aligned TN-LCD with LPUV light irradiation on PI surface is useful in applying LCD as for rubbing-free treatment method.

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Electro-optical properties of photo-aligned VA-LCD by irradiation of unpolarized UV light. (비편광 UV조사에 의한 광배향 VA-LCD의 전기광학특성)

  • 박두석;서대식
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1999.11a
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    • pp.545-548
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    • 1999
  • The electro-optical characteristics of photo-aligned vertical-alignment (VA)-liquid crystal display (LCD) with non-polarized ultraviolet (UV) light irradiation of 45\`on homeotropic polyimide (Pl) surface were investigated. LC alignment on photo-aligned VA-LCD is attributed to photo-depolymerized reaction of the polymer with non-polarized UV light irradiation on PI surface. We had good voltage-transmittance (V-T) characteristics of photo-aligned VA-LCD. The response time of photo-aligned VA-LCD was slower than that of the rubbing-aligned VA-LCD. Finally, we suggest that the slow response time of photo-aligned VA-LCD depends on the LC domain.

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The Characteristics of P.H.C Pile using Admixture by Waste TFT-LCD Glass Powder (폐 TFT-LCD 유리분말을 혼입한 고강도 콘크리트 파일의 특성)

  • Jeon, Seong-Hwan;Min, Kyung-San;Soh, Yang-Seob
    • Journal of the Korean Ceramic Society
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    • v.47 no.5
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    • pp.419-425
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    • 2010
  • In order to examine the P.H.C pile raw material using glass forming ceramic. The used materials is ordinary portland cement, waste TFT-LCD glass powder and reactive agent(Ca$(OH)_2$). The first experiment is characteristics analysis of the waste TFT-LCD glass powder, For the second experiment is mortar and concrete compressive strength for using of the concrete file raw material for waste TFT-LCD glass powder. The results of experiment showed that the substitution ratio of 10% waste TFT-LCD glass powder and 1% reactive agent(Ca$(OH)_2$) was excellent at a point of view for the physical characteristic. The study's most important finding is that the recycling of waste TFT-LCD glass powder.

Effects of Liquid Crystal Alignment on the Electro-Optical Characteristics of a-TN-LCD (a-TN-LCD의 전기광학특성에 미치는 액정배향의 효과)

  • 서대식;이창훈;황율연;이보호;이승희;김향율
    • Electrical & Electronic Materials
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    • v.10 no.1
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    • pp.15-19
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    • 1997
  • The characteristics of the response time and the viewing angle on twisted nematic (TN) liquid crystal display (LCD) and amorphous (a)-TN-LCD without rubbing were investigated. To measure the tansmission-voltage, response time, and viewing angle characteristics, we prepared three kinds of LC cells and then studied the surface liquid crystal alignment effect. It was found that the response time on A-TN-LCD was fast compared to the TN-I-CD, and the weak anchoring strength was attributed to the fast response time on a-TN-LCD. Also, we obtained the wide viewing angle characteristics on a-TN-LCD. The liquid crystal alignment of LCD device for electro-optical characteristics is discussed in the present paper.

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LCD의 전성시대

  • 정기성
    • Product Safety
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    • s.55
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    • pp.28-32
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    • 1997
  • 우리는 많은 종류의 디스플레이를 접하며 살고 있다. 계산기, 전화기, 무선호출기, 휴대폰, 컴퓨터 등 거의 모든 전자제품에 디스플레이가 부착되어 있고, 이들 디스플레이의 대부분에 LCD가 사용되고 있다. 이에 LCD에 대한 기본 상식과 응용, 그리고 현재 개발되고 잇는 것들은 무엇인지 살펴보고 우리의 미래생활에 LCD가 어떠한 역할을 할 것인지 살펴보자.

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