57.1: Novel Pixel Design for a Transflective IPS‐LCD with an In‐Cell Retarder

Imayama, Hirotaka; Tanno, Junji; Igeta, Koichi; Morimoto, Masahiko; Komura, Shinichi; Nagata, T.; Itou, Osamu; Hirota, Shoichi

doi:10.1889/1.2785639

Cited by 20 publications

(14 citation statements)

References 6 publications

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“…matrix 방식에는 바로 적용가능 하리라 기대한다. 제안한 편광판 기판은 마스크를 이용하여 패턴 전극을 형 성시킬 수도 있고, 편광판의 양면에 전극을 형성시켜 두 층 의 panel을 사용하는 전반사전투과 액정소자 [1,2] 나 3D 디스 플레이 [3] 에 적용할 수도 있으며, in-cell 구조 [23,24] 등 다양한 형태로 적용 가능할 것이다. 그 예로, 최근 각광받고 있는 전 반사전투과 액정 디스플레이에 편광판 기판을 적용한다면, 그림 9(a)와 같이 4장의 유리 기판과 3장의 편광필름을 사용 하는 전반사전투과 액정 디스플레이에서 4장의 유리 기판을 양면에 전극이 형성된 편광판 기판 1장과 단면에 전극이 형 성된 편광판 기판 2장을 이용하면 4장의 유리를 제거할 수 있으며, 위 구조에 그림 9(b)와 같이 상하부에 유리를 적용하 여도 2장의 유리 기판을 제거할 수 있어 parallax [4,5] 도 개선 하고, 내구성도 높은 소자를 제작할 수 있다.…”

Section: 서 론unclassified

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates

진혜정¹,

김기한²,

박경호³

et al. 2011

Korean Journal of Optics and Photonics

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Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates (Received December 21, 2010; Revised manuscript February 7, 2011; Accepted February 7, 2011) We propose a super-thin and light-weight liquid crystal cell, in which glass substrates are eliminated and polarizers are used as substrates. We fabricate a polarizer substrate by depositing a-SiOX as a buffer layer, indium-tin-oxide as a transparent conducting layer, and a-SiOX as an alignment layer on a polarizer sequentially at a low temperature. We use the ion-beam method to align liquid crystals on polarizer substrates. . 이 외에도 최근 등장한 전면반사/전면투과 액정 디스플레이의 경우 투과모드 dark시 반사모드 bright가 동시 에 구현되는 계조반전을 제거하기 위하여 두 층의 액정층이 필요한데 이로 인해 픽셀면적 대비 소자가 두께가 훨씬 커지 게 되므로 반사모드 동작 시 한 sub-pixel로 입사한 빛이 다 른 sub-pixel로 출사하는 parallax 문제가 발생되어 시인성에 문제가 생긴다 [4][5][6][7] . 따라서, 초경량박형의 액정 디스플레이를 구현하기 위해 유리를 얇게 가공하는 방법이 발표되었지만 [8,9] 이러한 방법

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Section: 서 론unclassified

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates

진혜정¹,

김기한²,

박경호³

et al. 2011

Korean Journal of Optics and Photonics

View full text Add to dashboard Cite

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“…[5][6][7] In-cell retarder technology can replace conventional optical films used in transflective LCDs, by patterned coating within the LC cell itself. With a patterned in-cell retarder, the transflective LCD with different values of birefringence in the reflective and transmissive parts can be realized, [8][9][10][11][12] which may allow more freedom in designing the optical configuration of a transflective LCD. Because of their thermal and chemical weaknesses, in general, in-cell materials are coated on top of electrodes after thin film transistor processes.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle Doped In-Cell Retarder for Low Operating Voltage in Transflective Liquid Crystal Displays

Lee

Kim

et al. 2009

jjap

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In this paper, we propose a method of suppressing the increase in operating voltage caused by the in-cell retarder in transflective liquid crystal displays (LCDs), by doping nanoparticles with a high dielectric constant in the in-cell material. Doping with nano-particles increases the dielectric constant of the in-cell material by more than 5 times that of a pure in-cell material. The in-cell material with a high dielectric constant reduces the magnitude of the electric field, within the volume of the in-cell retarder, to decrease the operating voltages of a transflective LCD with an in-cell retarder. It is confirmed that the increase in operating voltage, in a transflective vertical alignment (VA) cell with an in-cell retarder, can be suppressed, from 3.8 to 0.7 V, by doping an in-cell material with 5 wt % TiO 2 .

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“…One is to form a half-wave in-cell retarder only in the reflective regions, and this patterned in-cell retarder does not disturb the transmissive characteristics. 1,2 The other is the inverted driving method (IDM), a way of supplying different voltage signals to the transmissive and reflective regions. 3,4 Two common electrodes, which are equipped for the transmissive and reflective regions, are formed in one pixel.…”

Section: Introductionmentioning

confidence: 99%

Transflective IPS‐LCD with improved reflective contrast ratio

et al. 2009

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Abstract— In order to improve the reflective contrast ratio of transflective IPS‐LCDs, a novel pixel design for a normally white reflective IPS has been proposed. In this design, the large‐inter‐electrode‐spacing layout using a novel driving method and a double‐layered electrode have effectively reduced the light leakage. By applying these two technologies, a transflective IPS‐LCD has been successfully demonstrated with a high contrast ratio (15:1) in the reflective mode and a wide‐viewing‐angle characteristic in the transmissive mode.

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57.1: Novel Pixel Design for a Transflective IPS‐LCD with an In‐Cell Retarder

Cited by 20 publications

References 6 publications

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates

Nanoparticle Doped In-Cell Retarder for Low Operating Voltage in Transflective Liquid Crystal Displays

Transflective IPS‐LCD with improved reflective contrast ratio

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