79‐4L: <i>Late‐News Paper</i>: Highly Transparent LCD using New Scattering‐type Liquid Crystal with Field Sequential Color Edge Light

Okuyama, Kentaro; Nakahara, Tsutomu; Numata, Yudai; Nakamura, Tenfu; Mizuno, Manabu; Sugiyama, Hiroki; Nomura, Shinichiro; Takeuchi, Shunpei; Oue, Yoshihide; Kato, Hirofumi; Ito, Shohei; Hasegawa, Akira; Ozaki, Tadafumi; Douyou, Mamoru; Imai, Tetsuo; Takizawa, Keiji; Matsushima, Satoshi

doi:10.1002/sdtp.11851

Cited by 22 publications

(14 citation statements)

References 3 publications

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“…Especially, LCD and OLED system have been intensively proposed to form transparent display. [ 18–26 ] However, these systems can cause problems that the display performance is deteriorated due to the light environment, particularly under strong light condition. Furthermore, low transmittance is another issue to be enhanced.…”

Section: Introductionmentioning

confidence: 99%

Reflective‐Type Transparent/Colored Mirror Switchable Device Using Reversible Electrodeposition with Fabry–Perot Interferometer

Sung

Han

Song

et al. 2020

Adv Materials Technologies

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light condition. Furthermore, low transmittance is another issue to be enhanced. To retain the stability of outdoor visibility, the intensity of illumination is necessarily increased, which lead to eye fatigue and increase power consumption. To ensure the properties of outdoor visibility and high energy efficiency, reflective-type display can be a solution technique. In particular, electrochromic devices based upon the reversible electrodeposition (RED) technology is suitable for transparent display. RED system realizes transparent and reflective mode as selectively formed and removed the reflector. [27-36] Although RED has potential to be used as the display applications, there are insufficient attempts on show colors. In typical display, pigment/dye-based and structural-based color filters have been studied to absorb or emit specific wavelengths. Despite pigment/dye-based color filter has wide viewing angle and high color ratio, it has low chemical stability and imperfect color impurity. [37-39] Whereas, structuralbased color filter such as plasmon resonance [40-43] and Fabry-Perot (FP) interferometer [44-51] on the basis of the interaction between nanostructure and incident light provides the merits of spectral selectivity, chemical and thermal stability. These advantages led to obtain multicolor in single RED device by controlling the silver structure for plasmonic resonance. [52-56] However, fine control the metal structure for multicolor is essential, which can affect limitation to reproducibility and stability. On the other hand, there is no case for multicolored RED device with FP interferometer. FP-type color filter generates only the selected light by using the thin-film interference effect of multiple reflected waves from reflector. Therefore, various colors can be tuned by variety of materials and controlled cavity with simple process. In terms of robustness to variation cavity, material that have low refractive index is proper to form the thin films. [46] Moreover, low absorption characteristic in visible range is required to reduce the optical loss. Compared to others, indium-tin-oxide (ITO) has relatively low refractive index and low absorption spectra in visible range. In this paper, we first proposed a new structure for a transparent/colored mirror switchable RED device by integrating the micropixelated ITO (red, green, and blue: RGB) cavities for the FP interferometer. A variable thickness of ITO films and partially reflective Tungsten (W) film were used as Reversible electrodeposition (RED) devices have been considered as the optical transmittance or reflectance switchable display for the reflective display applications. In this study, transparent/colored mirror switchable RED device is demonstrated by integrating the Fabry-Perot (FP) interferometer. Indium-tin-oxide (ITO)-based FP interference effect is utilized for color filter to emit particular wavelength. Color-switchable RED cells are researched using ITO (red, green, and blue (RGB)) films and tungsten (W) films as partially reflective la...

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Section: Introductionmentioning

confidence: 99%

Reflective‐Type Transparent/Colored Mirror Switchable Device Using Reversible Electrodeposition with Fabry–Perot Interferometer

Sung

Han

Song

et al. 2020

Adv Materials Technologies

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“…For example, we consider the waveguide display based on PSLC. [36][37][38] The PSLC is sandwiched between two parallel substrates (either glass plate or plastic lm) with transparent electrode. Light emitting diodes (LEDs) are installed on the edge of the display.…”

Section: Introductionmentioning

confidence: 99%

Patterned waveguide liquid crystal displays

et al. 2020

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“…The polarizers and color filters absorb light, and therefore the displays usually have poor light efficiencies, less than 10% (about 6%). Recently, light waveguide liquid crystal/polymer composite display have been reported, potentially having the advantages of high energy efficiency and high transparency [12][13][14]. The light waveguide LCD does not need polarizers and color filters.…”

Section: Introductionmentioning

confidence: 99%

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

Shin

Wang

Qin

et al. 2020

Symp Digest of Tech Papers

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In this paper, we report an advanced color flexible waveguide display which consists of two flexible plastic substrates and a sandwiched layer of liquid crystal/polymer composite. The display is edgelit by white and color (R, G, and B) LEDs. In the absence of applied voltage, the liquid crystal is in a uniform aligned state and is transparent, and the incident light is waveguided through the display and no light comes out of the front plane of the display. When a voltage is applied, the liquid crystal is switched to a poly-domain state and becomes scattering, and the incident is scattered out of the front plane of the display. The display does not need polarizers and is thus compatible with plastic substrates with non-uniform birefringence. It has sub-ms response time and thus color sequential scheme can be used to display full color images. This flexible display has a big advantage in terms of energy efficiency because it does not need color filters and polarizers, and is suitable for transparent display application.

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79‐4L: Late‐News Paper: Highly Transparent LCD using New Scattering‐type Liquid Crystal with Field Sequential Color Edge Light

Cited by 22 publications

References 3 publications

Reflective‐Type Transparent/Colored Mirror Switchable Device Using Reversible Electrodeposition with Fabry–Perot Interferometer

Reflective‐Type Transparent/Colored Mirror Switchable Device Using Reversible Electrodeposition with Fabry–Perot Interferometer

Patterned waveguide liquid crystal displays

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

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