Light shutter using dye-doped cholesteric liquid crystals with polymer network structure

Yu, Byeong-Hun; Ji, Seong-Min; Kim, Jin-Hun; Huh, Jae Won; Yoon, Tae–Hoon

doi:10.1080/15980316.2016.1255673

Cited by 21 publications

(5 citation statements)

References 15 publications

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“…To enhance the contrast and visibility of smart windows, we doped dyes into PSLC mixture [12]. Figure 4a shows the absorption spectra of selected anthraquinone dye LT1641B.…”

Section: Resultsmentioning

confidence: 99%

“…Liquid crystal device is an attractive type of smart windows; in addition to having facile manufacturing process, highly adjustable transmittance, low driven voltage, and fast response speed [1,8,9,10], it is more important to manage the light in the whole visible spectrum. To date, polymer dispersed liquid crystals (PDLC) smart windows are one of the commercialized liquid crystals smart windows [4,11,12,13,14,15]. However, due to the dense polymer network, the anchoring force inhibits the reorientation of the liquid crystals (LC) molecules, which results in a high driving voltage for operating PDLC films.…”

Section: Introductionmentioning

confidence: 99%

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Dye-Doped Electrically Smart Windows Based on Polymer-Stabilized Liquid Crystal

Sun

Xie

et al. 2019

Polymers

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Here we report the fabrication of dye-doped polymer-stabilized liquid crystals (PSLC)-based smart windows. The effect of dye doping on PSLC contrast was investigated. Non-dichroic dye tints the PSLC sample in both off- and on-state, which is not beneficial for increasing its off/on contrast. The sample doped with dichroic dye shows a slight color in the off-state and strong color in the on-state, resulting in an enhanced contrast, which attributed to orientation dependent absorption of dichroic dyes. Furthermore, we blended non-dichroic dye and dichroic dye who have complementary absorption together into PSLC mixture. The sample is almost colorless in the off-state due to the subtractive process, while colored in the on-state. The contrast is further enhanced. The results show that the proposed multi-dye-doped PSLC device has high visual contrast and fast response time, making it attractive for applications in light management and architectural aesthetics.

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“…To enhance the contrast and visibility of smart windows, we doped dyes into PSLC mixture [12]. Figure 4a shows the absorption spectra of selected anthraquinone dye LT1641B.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dye-Doped Electrically Smart Windows Based on Polymer-Stabilized Liquid Crystal

Sun

Xie

et al. 2019

Polymers

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“…Recently, see-thr attention as nextcan be used as nformation on a iquid crystals ( polymer stabilize [16][17][18][19][20][21][22][23][24][25], and dye ight shutters, h because of their Moreover, the li because of thei window display operating voltage n this paper, w containing interd driven with inter urn-off switchin he applied elec with crossed in voltage.…”

Section: Introductmentioning

confidence: 97%

P‐144: Sub‐millisecond Switching of Polymer‐stabilized Liquid Crystals with Crossed Patterned Electrodes

Huh

Heo

et al. 2017

Symp Digest of Tech Papers

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We report switching of polymer‐stabilized liquid crystals (PSLCs) with crossed interdigitated electrodes. A PSLC cell with crossed interdigitated electrodes is switchable between the transparent and opaque states, and it exhibits a sub‐millisecond response time and a low operating voltage. In the transparent state, a PSLC cell driven with crossed interdigitated electrodes has high specular transmittance and low haze; in the opaque state, it has low specular transmittance and high haze. The measured turn‐on and turn‐off time of the fabricated PSLC cells were 0.47 ms and 0.46 ms, respectively. We expect that a PSLC cell driven with crossed interdigitated electrodes can be applied to window display applications.

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“…Smart window which can control its optical property by electric field has been actively studied for architectural and automotive applications. Among various smart window technology, liquid crystal (LC) smart window [1][2][3][4][5][6][7][8][9][10][11][12] have got attention by its unique property, such as haziness tuning, fast response time. A polymer dispersed LC (PDLC) device is widely used for controlling privacy [1].…”

Section: Introductionmentioning

confidence: 99%

84‐3: A Novel 2D Diffractive Liquid Crystal Smart Window using Single‐sided Engineered Electrode Structure

Huh,

Yoon

2023

Symp Digest of Tech Papers

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Smart window technology has been studied actively because it can simply control optical property of window by external power. Among various smart window technology, a phase grating liquid crystal (LC) device shows outstanding properties such as clear off state, high haze in on state, and no viewing angle dependence. Although it can have excellent optical performance, an LC phase grating device requires complicated pattern electrode structure on both top and bottom substrate. To make the device in cost effectiveness, it is required that simple and cost saving design of LC cell is essential.In this presentation, we will introduce our recent progress in LC phase grating smart window. Based on the optimal LC cell design, a trade‐off between performance and cost was minimized while maintaining the advantages of previously researched phase grating LC smart window.

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Light shutter using dye-doped cholesteric liquid crystals with polymer network structure

Cited by 21 publications

References 15 publications

Dye-Doped Electrically Smart Windows Based on Polymer-Stabilized Liquid Crystal

Dye-Doped Electrically Smart Windows Based on Polymer-Stabilized Liquid Crystal

P‐144: Sub‐millisecond Switching of Polymer‐stabilized Liquid Crystals with Crossed Patterned Electrodes

84‐3: A Novel 2D Diffractive Liquid Crystal Smart Window using Single‐sided Engineered Electrode Structure

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