P‐82: Color Flexible Waveguide Display using Polymer Stabilized Liquid Crystal

Shin, Young Sik; Wang, Qian; Qin, Guangkui; Yang, Deng‐Ke

doi:10.1002/sdtp.14215

Cited by 3 publications

(2 citation statements)

References 25 publications

(18 reference statements)

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“…Changes in the optical characteristics of "smart" windows are implemented using systems with suspended particles [4], liquid crystal systems [5], as well as electrochemical electrochromic materials [6]. The latter are industrially used in variable-transparency windows.…”

Section: Deposition Of Ni(oh) 2 -Pva Coatingsmentioning

confidence: 99%

Determination of the effect of exposure conducted in KOH solutions at different temperatures on the properties of electrochromic Ni(OH)2-PVA films

Kotok

Кovalenko

Nafeev

et al. 2021

EEJET

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To determine the effect of exposure of film composite electrodes based on Ni(OH)2-polyvinyl alcohol to an alkaline solution at high temperatures on the electrochromic and electrochemical characteristics, a series of films was obtained. The films were obtained on a glass substrate coated with fluorine-doped tin oxide. The coating of the substrates was carried out by the cathodic template method under the same conditions. The resulting precipitates were treated by keeping them in an alkali solution at different temperatures: 30, 40, 50, 60, and 70 °C for 8 hours, thereby simulating the operating conditions of an electrochromic device in a hot climate. It was found that the exposure temperature directly affected the electrochemical and electrochromic properties of the treated films. In this case, the cyclic volt-ampere curves showed a decrease in the peak values of the current densities and a lower rate of establishment of characteristics with an increase in the treatment temperature. At a maximum treatment temperature of 70 °C, the properties of the film significantly changed towards deterioration. According to the results of the experiments, three temperature ranges of treatment were identified. The first one was in the range up to 40 °C, in which the films showed significant electrochromic and electrochemical activity after treatment. The second interval was between 40 and 60 °C, in which the coatings showed a reversible deterioration in electrochromic and electrochemical activity. After treatment in the second interval, the films gradually restored their performance during electrochemical cycling. The third interval was from 70 °C and above. The films treated in this temperature range irreversibly lost their electrochemical and electrochromic activity. The study also proposed mechanisms to explain changes in the characteristics of electrodes during treatment, as well as possible ways to combat temperature degradation.

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Section: Deposition Of Ni(oh) 2 -Pva Coatingsmentioning

confidence: 99%

Determination of the effect of exposure conducted in KOH solutions at different temperatures on the properties of electrochromic Ni(OH)2-PVA films

Kotok

Кovalenko

Nafeev

et al. 2021

EEJET

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“…In previous papers [17][18][19][20], we reported the light waveguide LCD which is enabled by light scattering of polymer stabilized LC. When no voltage is applied, the LC is uniformly oriented and exhibits no scattering, the incident light does not come out of the viewing side of the display.…”

Section: Introduction `mentioning

confidence: 99%

38‐5: Student Paper: Waveguide Liquid Crystal Display with Light Waveguide Plate for Transparent Display

Shin

Zhou

Wang

et al. 2021

Symp Digest of Tech Papers

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We report a transparent display based on light waveguide liquid crystal display (LCD) under illumination of a light waveguide plate. LED is installed on the edge of the display. The generated light is coupled into the LCD by the light waveguide plate. In the voltage‐off state, the LC is transparent, and the incident light is waveguided through the display and no light comes out of the viewing side of the display. When a voltage is applied, the LC become scattering, and the incident light is scattered out of the viewing side of the display. The spatial uniformity of the light intensity of the display is significantly improved by the light waveguide plate. The transparent display has the merits of high contrast ratio, suitable driving voltage, and a sub‐milli second ultrafast response time. Furthermore, it does not need polarizers and color filter, and thus has a very high transmittance in the voltage‐off state.

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Flexoelectric-effect-based light waveguide liquid crystal display for transparent display

et al. 2022

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We report a light waveguide liquid crystal display (LCD) based on the flexoelectric effect. The display consists of two parallel flat substrates with a layer of flexoelectric liquid crystal sandwiched between them. A light-emitting diode (LED) is installed on the edge of the display and the produced light is coupled into the display. When no voltage is applied, the liquid crystal is uniformly aligned and is transparent. The incident light propagates through the display by total internal reflection at the interface between the substrate and air, and no light comes out of the viewing side of the display. The display appears transparent. When a voltage is applied, the liquid crystal is switched to a micrometer-sized polydomain state due to flexoelectric interaction and becomes scattering. The incident light is deflected from the waveguide mode and comes out of the viewing side of the display. We achieved thin-film-transistor active matrix compatible driving voltage by doping liquid crystal dimers with large flexoelectric coefficients. The light waveguide LCD does not use polarizers as in conventional LCDs. It has an ultrahigh transmittance near 90% in the voltage-off state. It is very suitable for transparent display, which can be used for head-up display and augmented reality display.

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P‐82: Color Flexible Waveguide Display using Polymer Stabilized Liquid Crystal

Cited by 3 publications

References 25 publications

Determination of the effect of exposure conducted in KOH solutions at different temperatures on the properties of electrochromic Ni(OH)2-PVA films

Determination of the effect of exposure conducted in KOH solutions at different temperatures on the properties of electrochromic Ni(OH)2-PVA films

38‐5: Student Paper: Waveguide Liquid Crystal Display with Light Waveguide Plate for Transparent Display

Flexoelectric-effect-based light waveguide liquid crystal display for transparent display

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