Zobrazeno 1 - 10
of 12
pro vyhledávání: '"H. G. Walton"'
Autor:
H. G. Walton
Publikováno v:
Molecular Crystals and Liquid Crystals. 574:60-66
Measurements are reported of the splay and bend elastic constants, and the Freedericksz threshold voltages of the nematic liquid crystal 4′-butyl-4-heptyl-bicyclohexyl-4-carbononitrile (CCN47) doped with low concentrations of titanium dioxide (TiO2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f96dc51e1e394e4a402428277d0475c
https://doi.org/10.1080/15421406.2012.762496
https://doi.org/10.1080/15421406.2012.762496
Autor:
H. G. Walton, Alexander Zawadzki
Publikováno v:
Molecular Crystals and Liquid Crystals. 569:10-14
We report measurements of the splay and bend elastic constants of 4′-butyl-4-heptyl-bicyclohexyl-4-carbononitrile (CCN47). We find K11 to be largely constant across the nematic range, with a value of ∼10 pN. K33 has a slightly lower value with K3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0457338d53d653164a99d0d7a8561be6
https://doi.org/10.1080/15421406.2012.691070
https://doi.org/10.1080/15421406.2012.691070
Autor:
C. Tombling, R. Winlow, M. D. Tillin, H. G. Walton, E. J. Acosta, Michael John Towler, B. Henley, E. Walton, D. Kean
Publikováno v:
Liquid Crystals. 31:1619-1625
It is well known that the operating state (e.g. bend or V state) of a pi-cell must be nucleated prior to operation. For direct view liquid crystal display applications, such as direct view TV, low voltage nucleation of the operating state is necessar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14c9555ff8033f654881e2b847932f98
https://doi.org/10.1080/02678290412331315968
https://doi.org/10.1080/02678290412331315968
Autor:
Michael John Towler, H. G. Walton
Publikováno v:
Liquid Crystals. 27:1329-1335
We discuss the role of the Miesowicz viscosities on director reorientation in pi-cells, showing that the symmetry of this system allows for a simplification of the dynamical equations. We consider practical aspects of material optimisation for increa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3c9dca9c486f1d4354070328d4dfc66
https://doi.org/10.1080/026782900423386
https://doi.org/10.1080/026782900423386
Publikováno v:
Liquid Crystals. 27:977-984
The role of surface tilt in the operation of pi-cells (OCB) is discussed. We show the effect of tilt on the relative stability of the H and V states, the switching characteristics and the domain growth speed. We further study the effects of temperatu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e73141474cae17fb623d58a64c630476
https://doi.org/10.1080/02678290050043932
https://doi.org/10.1080/02678290050043932
Autor:
H. G. Walton, M. J. Towler
Publikováno v:
Liquid Crystals. 27:157-161
We describe the director configurations associated with a negative dielectric anisotropy, high pretilt (typically ~ 85°) nematic cell. A number of distinct director configurations are observed, with both a transition to a spontaneously twisted state
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e755779dbd181b6ed5b59fa090e0295
https://doi.org/10.1080/026782900202912
https://doi.org/10.1080/026782900202912
Publikováno v:
Liquid Crystals. 27:75-80
Mukai and Nakagawa have predicted that hairpin and lightning defects correspond to compressive and dilative regions in the smetic C layer structure. Walton et al. have previously used the Helfrich-...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c9737601c7b58a6467ab9cd57957494
https://doi.org/10.1080/026782900203245
https://doi.org/10.1080/026782900203245
Publikováno v:
Liquid Crystals Today. 8:5-9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42e002480961f5504e1efaaeed0de603
https://doi.org/10.1080/13583149808047692
https://doi.org/10.1080/13583149808047692
Publikováno v:
Liquid Crystals. 20:665-668
The hydrodynamic equations for flow past a finite barrier within a ‘bookshelf’ aligned smectic A liquid crystal are solved. Solutions are found for the flow components within (v x) and normal (v z) to the smectic layers. The behaviour of the v z
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c1f71f72beccad0e9deecacf5d275a3
https://doi.org/10.1080/02678299608031157
https://doi.org/10.1080/02678299608031157
Publikováno v:
Liquid Crystals. 15:551-558
We demonstrate that the addition of small amounts of a novel azo-dye to a ferroelectric liquid crystal and illumination with low intensity (∼ 0.8 mW cm−2) UV light can result in reversible, isothermal phase transitions and dramatic changes in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b66450a5055c35b4ec95dccbe45563d
https://doi.org/10.1080/02678299308036474
https://doi.org/10.1080/02678299308036474