Driving method of liquid crystal element
A technology of liquid crystal elements and driving methods, which is applied in nonlinear optics, instruments, optics, etc., and can solve problems such as long time
Active Publication Date: 2018-08-10
STANLEY ELECTRIC CO LTD
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[0003] However, the liquid crystal display element of the above-mentioned conventional example still has room for improvement in that the alignment state of the liquid crystal molecules in the liquid crystal layer is changed from a state twisted in the second rotation direction to a state twisted in the first rotation direction. takes longer
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[0044] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0045] figure 1 It is a schematic diagram schematically showing the operation of an inverse TN type liquid crystal element. The reverse TN type liquid crystal element includes, as a basic structure, an upper substrate 1 and a lower substrate 2 arranged to face each other, and a liquid crystal layer 3 provided therebetween. The surfaces of the upper substrate 1 and the lower substrate 2 are subjected to orientation treatment such as rubbing treatment. The upper substrate 1 and the lower substrate 2 are arranged to face each other so that their alignment processing directions (indicated by arrows in the figure) intersect each other at an angle of about 90°. The liquid crystal layer 3 is formed by injecting a nematic liquid crystal material between the upper substrate 1 and the lower substrate 2 . The liquid crystal layer 3 adopts a liquid crystal material added with a ...
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Abstract
PROBLEM TO BE SOLVED: To reduce a time period required for a state transition of a liquid crystal layer in a liquid crystal element using a transition between two alignment states.SOLUTION: The liquid crystal element includes a first substrate, a second substrate, a liquid crystal layer disposed between the first substrate and the second substrate, an electrode to impart to the liquid crystal layer a first electric field in a direction substantially perpendicular to the substrate surface and a second electric field substantially parallel to the substrate surface, and a drive circuit to supply a drive voltage to the electrode. Directions of an alignment process applied to the first substrate and the second substrate are set to induce a first alignment state where liquid crystal molecules in the liquid crystal layer are twisted in a first direction; and the liquid crystal layer contains a chiral material that induces a second alignment state where the liquid crystal molecules are twisted in a second direction opposite to the first direction. A drive voltage supplied from the drive circuit first imparts the first electric field to the liquid crystal layer and then imparts the second electric field. The liquid crystal layer transmits from the first alignment state to the second alignment state by application of the first electric field and the second electric field.
Description
technical field [0001] The present invention relates to a technique for improving photoelectric characteristics in a method of driving a liquid crystal element. Background technique [0002] In Japanese Unexamined Patent Publication No. 2011-203547 (Patent Document 1), a novel liquid crystal display element (reverse TN type liquid crystal element) utilizing transition between two alignment states is disclosed. The liquid crystal display element of this conventional example has an alignment-treated first substrate, a second substrate, and a twist-aligned liquid crystal layer arranged between these substrates, and the liquid crystal layer contains a chiral material. In addition, when the liquid crystal layer does not contain a chiral material, when the rotational direction of the twisted liquid crystal molecules is set as the first rotational direction, the chiral material imparts to the liquid crystal molecules a rotation in a second rotational direction opposite to the first...
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IPC IPC(8): G02F1/1337G02F1/139
CPCG02F1/1337G02F1/1343G02F1/1396
Inventor 加藤惠介都甲康夫
Owner STANLEY ELECTRIC CO LTD