From molecular to continuum modelling of bistable liquid crystal devices
نویسندگان
چکیده
We study nematic equilibria on a square with tangent Dirichlet conditions on the edges, in three different modelling frameworks: (i) the off-lattice Hard Gaussian Overlap and Gay–Berne models; (ii) the lattice-based Lebwohl–Lasher model; and the (iii) two-dimensional Landau-de Gennes model. We compare the modelling predictions, identify regimes of agreement and in the Landaude Gennes case, find up to 21 different equilibria. Of these, two are physically stable. ARTICLE HISTORY Received 11 November 2016 Accepted 30 January 2017
منابع مشابه
X iv : m at h - ph / 0 61 10 16 v 1 8 N ov 2 00 6 Topology and Bistability in liquid crystal devices
We study nematic liquid crystal configurations in a prototype bistable device the Post Aligned Bistable Nematic (PABN) cell [9]. Working within the Oseen-Frank continuum model, we describe the liquid crystal configuration by a unit-vector field n, in a model version of the PABN cell. Firstly, we identify four distinct topologies in this geometry. We explicitly construct trial configurations wit...
متن کاملar X iv : m at h - ph / 0 61 10 16 v 1 8 N ov 2 00 6 Topology and Bistability in liquid crystal devices
We study nematic liquid crystal configurations in a prototype bistable device the Post Aligned Bistable Nematic (PABN) cell [9]. Working within the Oseen-Frank continuum model, we describe the liquid crystal configuration by a unit-vector field n, in a model version of the PABN cell. Firstly, we identify four distinct topologies in this geometry. We explicitly construct trial configurations wit...
متن کامل51.1: Invited Paper: Bistable LCDs based on a New Alignment Technology
Several new nematic bistable liquid crystal displays based on a new alignment surface have been demonstrated. Nano-textured alignment surfaces enable the generation of arbitrary pretilt angles and arbitrary anchoring energy. Based on such surfaces, three types of bistable devices have been developed. They are bistable bend-splay, bistable twist-twist and bistable bend-twisted displays.
متن کاملA Novel Approach to Modelling Nematic Liquid Crystal Cells
computer simulation, liquid crystals, displays We present a novel lattice modelling approach for the behaviour of nematic liquid crystals in cells. Our model includes elastic deformation energy, finite surface anchoring and applied voltages. These have been implemented and tested in a twodimensional model. We present results from this model for various analytic test cases and for a real scannin...
متن کاملSimple modeling of bistable nematic Liquid Crystal Display devices: What is the optimal design?
Bistable Liquid Crystal Displays (LCDs) offer the potential for considerable power savings, compared with conventional (monostable) LCDs. The existence of two stable field-free states that are opticallydistinct means that contrast can be maintained in a display without an externally-applied electric field. An applied field is required only to switch the device from one state to the other, as ne...
متن کامل