[특허]Organic polymer O-plate compensator for improved gray scale performance in twisted nematic liquid crystal displays

[미국특허] Organic polymer O-plate compensator for improved gray scale performance in twisted nematic liquid crystal displays 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G02F-001/133.5
출원번호	US-0388131 (1999-09-01)
발명자 / 주소	Winker Bruce K. Ryang Hong-Son Warren Jr. Leslie F. Rosenblatt Charles Li Zili Chung Young J.
출원인 / 주소	Rockwell International Corporation
대리인 / 주소	Foley & Lardner
인용정보	피인용 횟수 : 22 인용 특허 : 55

초록 ▼

An O-plate compensator comprising an organic liquid crystal polymer, and methods for fabricating the same, are disclosed. The compensator is a uniaxial birefringent thin film with its extraordinary axis oriented obliquely with respect to the surface of the film. (It is noted that the birefringent thin film could be weakly biaxial.) The oblique orientation of the liquid crystal director, which is parallel to the films extraordinary axis, is achieved by casting an organic thin film onto a surface specially prepared for a orienting liquid crystals, such as obliquely deposited SiO, mechanically rubbed alignment agents. The film can either be cast from a solution of the liquid crystal polymer or from a reactive liquid crystal monomer having a nematic phase. Any solvent that may be used during the fabrication process is evaporated off and the organic thin film is held at a temperature in its nematic phase. If a reactive monomer is used, the film is then photopolymerized. Alternative embodiments of an organic O-plate include the use of smectic-A and smectic-C materials. Fabrication techniques employing these materials are described.

대표청구항 ▼

[ What is claimed is:] [1.]1. A liquid crystal display adapted to be viewed at various angles with respect to a normal axis perpendicular to a major surface of the display, comprising:a polarizer layer;an analyzer layer;a liquid crystal layer disposed between the polarizer layer and the analyzer layer;a first electrode disposed between the polarizer layer and the analyzer layer and proximate to a first major surface of the liquid crystal layer;a second electrode disposed between the polarizer layer and the analyzer layer and proximate to a second major surface of the liquid crystal layer opposing the first major surface, the first and second electrodes being adapted to apply a voltage across the liquid crystal layer when the electrodes are connected to a source of electrical potential;a first positively birefringent O-plate compensator layer disposed between the polarizer layer and the analyzer layer, wherein the first O-plate layer comprises a liquid crystal polymer with its optical symmetry axis oriented at an oblique tilt angle with respect to a major surface of the first O-plate layer; anda second positively birefringent O-plate compensator layer disposed between the polarizer layer and the analyzer layer, wherein the second O-plate layer comprises a liquid crystal polymer with its optical symmetry axis oriented at an oblique tilt angle with respect to a major surface of the second O-plate layer,wherein the projections of the optical symmetry axes of the first and second O-plate layers, respectively, onto the major surface of the display are crossed with respect to each other.

이 특허에 인용된 특허 (55) 인용/피인용 타임라인 분석

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Rosenblatt Charles (Beachwood OH) Fisch Michael R. (Lakewood OH) Crandall Karl A. (Bowling Green OH) Petschek Rolfe (Shaker Heights OH), Chiral nematic liquid crystal display with homeotropic alignment and negative dielectric anisotropy.
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Yeh Pochi A. (Thousand Oaks) Gunning William J. (Newbury Park) Eblen ; Jr. John P. (Newbury Park) Khoshnevisan Mohsen (Newbury Park CA), Compensator for liquid crystal display, having two types of layers with different refractive indices alternating.
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Kanemoto Akihiko (Yokohama JPX) Iimura Haruo (Yokohama JPX) Takiguchi Yasuyuki (Kawasaki JPX), DAP type liquid crystal device with cholesteric liquid crystal birefringent layer.
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Scheffer Terry J. (Wettingen CH), Device for the production and modulation of monochromatic light.
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Kanemoto Akihiko (Yokohama JPX) Takiguchi Yasuyuki (Kawasaki JPX) Iimura Haruo (Yokohama JPX), ECB type liquid crystal display device having birefringent layer with equal refractive indexes in the thickness and plan.
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Nakamura Taku (Kanagawa JPX), Elliptically polarizing plate comprising discotic liquid crystal and in which 30≤[(NX+NY)/2－NZ]×D≤150.
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Bos Philip J. (Beaverton OR), Gray scale liquid crystal display having a wide viewing angle.
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Hashimoto Chikara (Tokyo JPX) Takamatsu Atsushi (Matsusaka JPX) Itoh Hiroyuki (Yokohama JPX) Toyooka Takehiro (Yokohama JPX), Head-up display system where polarized light from a display impinges on a glass plate containing twisted nematic liquid.
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Gunning ; III William J. (Newbury Park CA) Winker Bruce K. (Moorpark CA) Taber Donald B. (Thousand Oaks CA) Kobrin Paul H. (Newbury Park CA) Beedy James C. (Ventura CA) Eblen ; Jr. John P. (Newbury P, Inorganic thin film compensator for improved gray scale performance in twisted nematic liquid crystal displays and metho.
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Koch Gene C. (Swisher IA) Winker Bruce K. (Moorpark CA) Gunning ; III William J. (Newbury Park CA), LCD splay/twist compensator having varying tilt and /or azimuthal angles for improved gray scale performance.
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Fnfschilling Jrg (Basel CHX) Schadt Martin (Seltisberg CHX), Light control systems with a circular polarizer and a twisted nematic liquid crystal having a minimum path difference of.
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Doane Joseph W. (Kent OH) Chidichimo Giuseppe (Rende MI ITX) Vaz Nuno A. P. (Southfield MI), Light modulating material comprising a liquid crystal dispersion in a plastic matrix.
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Clerc Jean-Frdric (Saint-Egrve FRX) Deutsch Jean-Claude (Grenoble FRX) Vaudaine Pierre (Grenoble FRX) Vey Sylvie (Grenoble FRX), Liquid crystal cell using the electrically controlled birefringence effect and a uniaxial medium of negative optical ani.
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Clerc Jean-Frdric (Meylan FRX) Deutsch Jean-Claude (Grenoble FRX), Liquid crystal cell which can have a homeotropic structure with compensated birefringence of said structure.
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Kanemoto Akihiko (Yokohama JPX) Iimura Haruo (Yokohama JPX) Takiguchi Yasuyuki (Kawasaki JPX) Iida Shigeki (Kawasaki JPX) Toyooka Takehiro (Yokohama JPX) Ito Hiroyuki (Yokohama JPX), Liquid crystal color display device provided with a color filter film and an optical phase plate comprising liquid cryst.
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Mori Hiroyuki (Kanagawa JPX), Liquid crystal compensator satisfying nx>nz>ny having ny and nz inclined.
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Sakaya Taiichi (Takatsuki JPX) Kuroda Toshiya (Takatsuki JPX) Higashi Koji (Takatsuki JPX) Shindo Tadashi (Toyonaka JPX) Shimizu Akiko (Ibaraki JPX), Liquid crystal device with phase retarder having layered inorganic compound.
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Ishii Yutaka (Nara JPX), Liquid crystal display apparatus having a particular optical compensating member.
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Kozaki Shuichi (Nara JPX) Ohnishi Hiroshi (Nara JPX) Yoshimizu Toshiyuki (Kyoto JPX), Liquid crystal display device comprising a retardation compensation layer having a maximum principal refractive index in.
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Yamahara Motohiro (Osaka JPX) Sasaki Kei (Narashino JPX) Hara Teruyoshi (Yamatokoriyama JPX) Kohzaki Shuichi (Nara JPX), Liquid crystal display device having a phase difference plate with one refractive index at an angle to the surface norma.
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Akatsuka Minoru (Yokohama) Sohda Yuji (Yokohama) Sawada Kazutoshi (Nishinomiya JPX), Liquid crystal display device having biaxial birefringent plates at each side of the liquid crystal layer.
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Arakawa Kohei (Kanagawa JPX), Liquid crystal display device having negative uniaxial anisotropic film with inclined optical axis and protective films.
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Miyazawa Yoshinaga (Fussa JPX) Miyashita Takashi (Hachioji JPX) Kikuchi Zenta (Hamura JPX), Liquid crystal display device with at least one biaxial retardation film having nx>nz>n_{.

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West John L. (5050 Fish Creek Rd. Stow OH 44224) Doane Joseph W. (1618 S. Lincoln St. Kent OH 44240) Zumer Slobodan (917 Allerton St. Kent OH 44240), Liquid crystal display material comprising a liquid crystal dispersion in a thermoplastic resin.
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Arakawa Kohei (Kanagawa JPX), Liquid crystal display with compensator having two films with positive and negative intrinsic birefringence, respectivel.
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Masumoto Yoshihiro (Kobe JPX) Ohmae Hideki (Suita JPX), Liquid crystal light valve apparatus with a pair of non-parallel phase difference plates.
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Mazaki Hitoshi (Kawasaki JPX) Toyooka Takehiro (Yokohama JPX) Itoh Hiroyuki (Yokohama JPX), Liquid crystal polymer viewing angle compensator for liquid crystal display having its largest refractive index in the t.
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Mazaki Hitoshi (Kawasaki JPX) Matsumoto Takuya (Yokohama JPX) Shiozaki Iwane (Yokohama JPX) Takikawa Shigeki (Yokohama JPX), Liquid crystalline polymer film, process for producing same, and utilization thereof.
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Iida Shigeki (Kawasaki JPX) Toyooka Takehiro (Yokohama JPX) Takiguchi Yasuyuki (Ota JPX) Enomoto Takamichi (Ota JPX), Method for polarizing light.
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Shiozaki Iwane (Yokohama) Toyooka Takehiro (Yokohama) Iida Shigeki (Kawasaki JPX), Method for producing compensator for liquid crystal display.
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Harris Frank W. (Akron OH) Cheng Stephen Z. D. (Akron OH), Negative birefringent polyimide films.
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Okada Toyokazu (Osaka JPX) Sakakura Kazuaki (Osaka JPX) Higashi Koji (Osaka JPX) Shimizu Akiko (Osaka JPX), Phase retarder and process for producing the same.
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Gunning ; III William J. (3924 Calle Valle Vista Newbury Park CA 91320) Winker Bruce K. (4438 Sugar Maple Ct. Moorpark CA 93021) Koch Gene C. (3090 Deerfield Dr. ; NE. Swisher IA 52338), Pixelated compensators for twisted nematic liquid crystal displays.
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Kumar, Satyendra, Polymer dispersed ferroelectric smectic liquid crystal.
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Minakuchi Keiichi (Toyonaka JPX) Shimomura Hideki (Funabashi JPX) Sakakura Kazuaki (Moriguchi JPX), Process for producing phase retarder film.
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Bonne Ulrich (Hopkins MN), Reflective displays.
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Vick Gerald L. (Mount Vernon IA), Wide viewing angle avionics liquid crystal display.
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[미국특허] Organic polymer O-plate compensator for improved gray scale performance in twisted nematic liquid crystal displays 원문보기

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[미국특허] Organic polymer O-plate compensator for improved gray scale performance in twisted nematic liquid crystal displays 원문보기

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