Cholesteric Liquid Crystals for Color Information Technology

Tamaoki, Nobuyuki

doi:10.1002/1521-4095(200108)13:15<1135::aid-adma1135>3.0.co;2-s

Cited by 429 publications

(311 citation statements)

References 36 publications

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“…Therefore, equating this threshold pressure for splitting with the electrically applied pressure in the other channel, it is determined that the spacer must be designed such that l42h. By allowing the ink to freely merge or split in either channel, these specialized spacers also completely eliminate the need for ink microencapsulation [6][7][8] or pixel borders, a novelty compared to all previous pixel approaches that move a colourant [2][3][4][5] . The spacers can be straight or, as shown in this work, slightly bowed between 120 and 1401 for an R H that is initially slightly positive to provide a small starting volume of oil.…”

Section: Resultsmentioning

confidence: 99%

“…This film is a first for all types of electrowetting-style displays by allowing nonaligned lamination fabrication [3][4][5] . Furthermore, the film is able to efficiently split merged fluid and therefore eliminate the need for ink microencapsulation [6][7][8] or pixel borders needed in other displays that also move a colourant [2][3][4][5] . We have designed and fabricated 25 and 150 pixels-per-inch (PPI) versions of this electrofluidic imaging film.…”

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confidence: 99%

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Bright e-Paper by transport of ink through a white electrofluidic imaging film

et al. 2012

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Many of the highest performance approaches for electronic paper use voltage to reveal or hide dark pigments or dyes over a white pixel surface, and the reflectance of white pixels is lower than in real paper because the dark pigments or dyes can never be fully removed from the visible pixel area. Here, we introduce a re-designed approach for electronic paper that transposes coloured ink in front of or behind a white microfluidic film. Pixels can provide 490% reflective area and have demonstrated o15 ms switching for 150 pixels-per-inch resolution. This new approach is also the first of its kind for electrowetting-style displays by allowing non-aligned lamination fabrication, and is the first ever colourant-transposing pixel that eliminates the need for ink microencapsulation or pixel borders.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Bright e-Paper by transport of ink through a white electrofluidic imaging film

et al. 2012

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“…[20][21][22][23][24][25] To date, mirrorless laser action from the dye-doped CLCs has been frequently investigated for use in the molecular photonic devices. 17 The following sections outline the typical experimental results of laser action behaviors of CLCs by optical excitation.…”

Section: Clcs As Pcsmentioning

confidence: 99%

Self-assembled organic and polymer photonic crystals for laser applications

Furumi

2012

Polym J

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This article describes an overview of recent developments in fabrication and uses of self-assembled photonic crystals (PCs) of organic and polymer materials, such as chiral liquid crystals (CLCs) and colloidal crystals (CCs), for laser applications. Both CLCs and CCs have intrinsic capabilities to spontaneously assemble 1D-PC and 3D-PC structures, respectively. When a periodic length in the PC structures of CLCs and CCs corresponds to several hundred nanometers of the light wavelength, the photonic band-gaps (PBGs) can be visualized as Bragg reflection colors. When combining fluorescence dyes in the CLCs and CCs, the stimulated laser action at PBG band edge(s) or within the PBG wavelength can be generated by optical excitation. Moreover, the optically excited laser action is controllable by external stimuli due to the self-organization of CLCs and CCs. This review highlights not only the research backgrounds of CLC and CC structures as PCs, but also the experimental results of their versatile soft and tunable laser applications. We believe that a wide variety of CLC and CC structures will have leading roles in the next generation of optoelectronic devices of organic and polymer materials.

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“…Уникальное свойство холестериков селективно отражать свет в видимой области [1] делает их незаменимыми при создании современ-ных температурных сенсоров для электроники и медицины, цветных фильтров и поляризаторов [2]. Возможность локального изменения оптических свойств холестерических мезогенов под действием света и электрического поля позволяет использо-вать их в качестве фотоактивных материалов для обратимой (и необратимой) цветной записи инфор-мации в системах с оптической памятью [3], для дисплейной технологии [4][5][6], фотоники, оптоэлек-троники [7] и голографии [8]. Перспективным сле-дует признать применение мезофазы холестериче-ского типа для анализа оптических изомеров орга-нических веществ методом газожидкостной хрома-тографии [9][10][11].…”

Section: Introductionunclassified