Fundamentals of Liquid Crystal Devices (Wiley Series in by Deng-Ke Yang

By Deng-Ke Yang

From computing device desktops and cellphones to electronic cinema, Liquid Crystal screens (LCDs) are quintessential elements in an expanding array of hugely fascinating shopper electronics and verbal exchange units, and are already the main expertise utilized in flat panel displays. This inter-disciplinary booklet is meant as an introductory advisor to the elemental homes of liquid crystals and their purposes in show and photonic units, delivering a easy figuring out of the physics, optics, electro-optics, and fabric features for cutting-edge demonstrate and photonic devices.Fundamentals of Liquid Crystal units includes:A accomplished review of LCDs together with liquid crystal physics, electro-optical houses, simulation concepts and show and photonic applications.Numerous examples and case experiences, solved difficulties and difficult homework conundrums beginning with simple physics and steadily introducing complicated equipment techniques and structures.The ideas for designing complex expert transmissive, reflective, and transflective liquid crystal displays.Chapters on rising applied sciences equivalent to tuneable liquid crystal photonic units together with laser beam guidance, gentle switches for telecommunication and tunable-focus lenses.Fundamentals of Liquid Crystal units is a necessary source for complex undergraduate and graduate scholars following exhibit structures classes, who will take advantage of its systematic process. The advent of complicated gadget ideas and buildings implies that reveal engineers, scientists, and technicians energetic within the box may also utilise this specific source, as can builders of a variety of structures and functions.

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Extra resources for Fundamentals of Liquid Crystal Devices (Wiley Series in Display Technology)

Example text

The interaction between the molecules comes from the interactions between the permanent dipoles. Calculate the interaction between two molecules in the following cases: (1) one molecule is on top of the other molecule and the dipoles are parallel, (2) one molecule is on top of the other molecule and the dipoles are anti-parallel, (3) the molecules are side by side and the dipoles are parallel, and (4) the molecules are side by side and the dipoles are anti-parallel. 3 Calculate the orientational order parameter in the following two cases.

K ? 110) Note that ak and a ? are the molecular polarizabilities contributed by the electronic and ionic polarizations. ~ ¼ E ? xˆ , the projection of the dipole along the When the applied field is perpendicular to ~ n, say E applied field is p ? 111) and the energy is u ¼ Àdpðsin b cos c cos f À sin b sin c cos y sin f À cos b sin ysin fÞE ? The average value of the projection is dE ? p2 1 2 1 ð2S þ 1Þ ð1 À SÞ sin b þ sin2 b þ cos2 b 4 4 3 3 kB T ! 2 dE ? p 1 ¼ 1 þ ð1 À 3cos2 bÞS 3kB T 2 h p ?

If yo ¼ 90 and there is no preferred azimuthal angle, the  anchoring is called planar. If 0 < yo < 90 , the anchoring is referred to as tilted. When the liquid crystal director ~ n is aligned along the direction specified by the polar angle y and the azimuthal angle f, the anisotropic part of the surface energy, referred to as the anchoring energy function, of the liquid crystal is fs ¼ fs ðy; fÞ. When y ¼ yo and f ¼ fo , fs has a minimum value of 0, and thus @fs =@yjy¼yo ¼ 0 and @ fs =@fjf¼fo ¼ 0.

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Fundamentals of Liquid Crystal Devices (Wiley Series in by Deng-Ke Yang
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