A longterm exposure to the ambient light and the backlight will inevitably destroy the alignment quality so as to deteriorate the contrast ratio. Indeed, the photo-sensitive azo-dye, SD1, does benefit vast varieties of devices, but this azo-dye has to be photo-stabilized when it is used in display panels, such as smartphone. The tunability on transmittance can be realized by a simple roller instead of conventional electrical-driving. By horizontally shifting one polarizer relative to the other, varying transmittance with good uniformity is obtained. Making use of this advantage, continuously axis-variable alignment thin film was achieved, on top of which a liquid crystal polymer/dichroic dye composited was coated and then photopolymerized to form a rigid axis-variable polarizer. Azo-dye SD1 is a very promising material for LC alignment, which gives high order and strong anchoring to LC after absorb a small amount of light dosage (i.e., 150 mJ/cm2). In addition to employing vertical polyimide thin film, we can use photoalignment material, azo-dye SD1, to develop a transmittance tunable smart window based on two axis-variable polarizers. The proposed smart window can serve as color transparent display using edge-light wave-guiding.
In addition, the performance on off-axis viewing, response speed and power consumption are much better than commercialized polymer-dispersed liquid crystal (PDLC) smart window. This inhomogeneity morphology on the thin film can considerably enhance the power-on haziness while provide an ultra-transparent power-off state. Here, an inhomogeneous vertical alignment thin film with micro-domain structure was proposed and employed on a normally transparent smart window.
#Advanced displays windows
In general, smart windows are developed either by optimizing the scattering composites or by designing an appropriate electrode pattern, while little investigation has been carried out on the alignment layer. Firstly, polyimide (PI) is a dominating material for LC alignment and is widely used in display devices, one of which is smart window. Therefore, development on high-performance thin films either for LC alignment or flexible OLED display are highly demanded. The employment of an ultra-thin polarizing film is also significant in rigid or flexible OLED display to suppress the reflection from cathode layer so as to improve the CR and outdoor readability. Alignment thin film used for LC molecules orientation should be characterized by high aligning order, non-contaminated film and robust photo-tolerance. An alignment film is an indispensable part in LCDs as well as recently emerging transparent display, and deeply influence their contrast ratio (CR) and light efficiency. Liquid crystal display (LCD) and organic light-emitting diode (OLED) display are two mainstream displays in the market due to their high-quality performance, which are further being developed to be an ultra-thin, transparent, flexible and even foldable display. Phase-change metasurfaces with an on-chip heater formed by transparentĬonductive oxide.Display technology has gradually but profoundly shaped the lifestyle of human beings. Time, an electrically-driven micro-scale display through the integration of We experimentally demonstrate, for the first Single reconfigurable metasurface with fixed geometrical parameters to generateįour distinct wide-gamut colors.
Suchĭegrees of freedom (i.e., material phase and polarization state) enable a Illuminated by either one of two orthogonally polarized incident beams. Exploiting polarization-sensitive buildingīlocks, the presented meta-pixel can generate two different colors when (Sb$_2$S$_3$) and antimony triselenide (Sb$_2$Se$_3$), with superbĬharacteristics to realize switchable, high-saturation, high-efficiency and Newly emerged classes of low-loss optical PCMs, i.e., antimony trisulphide Herein, we leverage tunable all-dielectric reflective metasurfaces made of States, have demonstrated promising potentials in reconfigurable nanophotonics. Phase-change materials (PCMs), with significantĬontrast of their optical properties between their amorphous and crystalline This hinders their applicability for front-endĭynamic display technologies. Despite recentĪdvances, most demonstrations of these structure-dependent colors lack High-saturation, and wide-gamut color printing applications.
#Advanced displays pdf
Muskens, Ali Adibi Download PDF Abstract: Structural colors generated due to light scattering from staticĪll-dielectric metasurfaces have successfully enabled high-resolution, Hewak, Matthias Wuttig, Andrea Alu, Otto L. Neilson, Christian Teichrib, Tyler Brown, Eric Pop, Daniel W. Authors: Omid Hemmatyar, Sajjad Abdollahramezani, Ioannis Zeimpekis, Sergey Lepeshov, Alex Krasnok, Asir Intisar Khan, Kathryn M.
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