2005
DOI: 10.1063/1.1849844
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Electrically commanded surfaces for nematic liquid crystal displays

Abstract: Electrically commanded surfaces (ECS) is a liquid crystal display concept whereby the switching of the alignment layer, which is driven by an electric field applied across the layer, is further transferred to the bulk liquid crystal material via elastic forces. This work presents the electro-optic response of a sandwich cell with alignment layer made of siloxane-based ferroelectric liquid crystal polymer, representing the ECS. The bulk liquid crystal material of choice was an in-house nematic mixture comprisin… Show more

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Cited by 41 publications
(32 citation statements)
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“…A series of methods have been developed to control the director boundary conditions, for example, irradiating alignment layers with ion beams, 20 doping the LC cells with nanoparticles, 21 or forming polymer structures on a substrate surface via electrostatic force 22,23 or UV light field. [24][25][26] In this present paper, we speculate that the photorefractive space-charge field may control the anchoring of the LC director at the cell substrates, and therefore affect the grating formation. We study the influence of the LC director anchoring energy and the easy axis direction on energy transfer between light beams incident on the hybrid cell.…”
Section: Introductionmentioning
confidence: 99%
“…A series of methods have been developed to control the director boundary conditions, for example, irradiating alignment layers with ion beams, 20 doping the LC cells with nanoparticles, 21 or forming polymer structures on a substrate surface via electrostatic force 22,23 or UV light field. [24][25][26] In this present paper, we speculate that the photorefractive space-charge field may control the anchoring of the LC director at the cell substrates, and therefore affect the grating formation. We study the influence of the LC director anchoring energy and the easy axis direction on energy transfer between light beams incident on the hybrid cell.…”
Section: Introductionmentioning
confidence: 99%
“…An alternative way to reorient LC is possible by modifying the LC surface anchoring with substrates by various external effects [3][4][5][6][7][8][9][10][11]. The methods of electrically induced modification of the surface anchoring seem to be the most interesting for practical application [8][9][10][11].…”
Section: Introductionmentioning
confidence: 99%
“…Such "active" layers can be used to enhance the functionality of LC devices. Suitable examples include the use of electrically commanded surfaces of ferroelectric LC polymer combined with nematic LCs [3] and those that include photoconducting polymers such as polyvinyl carbazole (PVK) [4,5].To optimize the performance of different polymer-LC systems, a reliable and universal technique is needed to determine a cross-section of the voltage profile across each of the layers and visualize their frequency response. Such a technique can provide an informative snapshot of the suitability of the aligning layer and LC materials for effective and stable light modulation [6].…”
mentioning
confidence: 99%
“…For example, in cells with electrically commanded aligning layers [3], the easy axis rotates in the polymer layer plane depending on the electric field dropped across the polymer layer. For this cell the electrical properties of the LC material have a significant effect on the functionality of the system, so the LC must be chosen very carefully.…”
mentioning
confidence: 99%
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