Patents Examined by Shean C Wu
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Patent number: 9340634Abstract: The present invention relates to materials used for aligning liquid crystals of liquid crystal display elements and to a polymer for use in liquid crystal vertical alignment layer used in producing a liquid crystal vertical alignment layer. The polymer for use in a liquid crystal vertical alignment layer includes (a) a moiety that is photochemically isomerizable but not photochemically crosslinked, (b) a moiety that is photochemically crosslinkable, and (c) a moiety that stabilizes a vertical alignment. The polymer can be used to produce a vertical alignment layer that has a liquid crystal alignment property enabling control of alignment at a low UV dose and that offers a large pretilt angle and superior optical stability.Type: GrantFiled: March 29, 2011Date of Patent: May 17, 2016Assignee: DIC CORPORATIONInventors: Sayaka Nose, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu, Martin Schadt, Vladimir Chigrinov, Hoi Sing Kwok
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Patent number: 9328289Abstract: A liquid crystal element which comprises: a pair of substrates with electrodes, in which the substrates are arranged so as to face each other and at least one of the substrates is a transparent substrate; and a liquid crystal light adjusting layer which is disposed between the substrates and contains a composite containing a chiral nematic liquid crystal phase and a polymer resin phase, wherein the polymer resin phase contains a polymer compound having a specific repeating unit, and dielectric constant anisotropy of the chiral nematic liquid crystal phase is positive.Type: GrantFiled: September 30, 2013Date of Patent: May 3, 2016Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Masami Kadowaki, Noriyuki Kida
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Patent number: 9329437Abstract: The invention belongs to the technical field of displaying, and provides a composition, an alignment layer and a method for preparing the same, a liquid crystal (LC) alignment unit and a liquid crystal display panel. The invention can solve the problems existing in the prior methods for achieving of multi-domain display of LC display devices, such as complex manufacturing processes, high cost, difficult to be manufactured. The composition (alignment layer) of the present invention allows adjusting the alignment of the molecules in the surface of the resultant coating layer of the composition, through adjusting the contents of the components in the composition, the polymerization temperature, and/or the thickness of the coating of the composition. The alignment layer, the LC alignment unit, and the LC display panel according to the invention can be prepared using a simple process and allow to achieve a multi-domain display at a lower cost.Type: GrantFiled: October 29, 2014Date of Patent: May 3, 2016Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Xiaojuan Wu, Hongliang Yuan
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Patent number: 9321961Abstract: Provided is a liquid crystal composition having a positive dielectric anisotropy, the liquid crystal composition containing two or more compounds selected from compounds represented by general formula (LC0-1) to general formula (LC0-3), and one or more compounds selected from groups of compounds represented by general formula (LC1) to general formula (LC5). The liquid crystal composition has features of a large ?? and a low viscosity, and provides a practical, highly reliable liquid crystal display element that can realize low-voltage driving and high-speed response. The liquid crystal composition is useful for an active matrix driving liquid crystal display element. The liquid crystal composition can be applied to a liquid crystal display element of an IPS mode or the like.Type: GrantFiled: August 29, 2013Date of Patent: April 26, 2016Assignee: DIC CORPORATION (TOKYO)Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
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Patent number: 9321960Abstract: A composition containing a compound represented by general formula (i) and a compound represented by general formula (ii): in the formulas, each of Xi1 to Xi6 independently represents a hydrogen atom, a fluorine atom or a chlorine atom, and each of Xii1 to Xii4 independently represents a hydrogen atom, a fluorine atom or a chlorine atom.Type: GrantFiled: December 11, 2012Date of Patent: April 26, 2016Assignee: DIC CORPORATION (TOKYO)Inventors: Joji Kawamura, Makoto Negishi, Masahiro Niwa
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Patent number: 9316882Abstract: To minimize color difference during white display, and secure high transmittance in liquid crystal panel driven by FFS mode or the like. Liquid crystal panel 10 has first substrate AR and second substrate CF oppositely arranged, and liquid crystal layer LC interposed between the first and the second substrates, wherein the first substrate has plural signal lines 18 and scanning lines 15 formed in matrix, upper electrode 24 having plural slit-shaped openings 25 divided by the scanning and signal lines, and formed for every sub-pixel, and lower electrode 21 formed with the upper electrode through insulating layer 23, the second substrate has light-shielding layer 28 superimposed with the signal and scanning lines in planar view, and color filter layer 29 formed for every sub-pixel, and the liquid crystal layer includes a mixture of at least one compound having negative dielectric anisotropy and at least one compound having positive dielectric anisotropy.Type: GrantFiled: March 20, 2014Date of Patent: April 19, 2016Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Shigeru Kibe, Toshiki Asakura, Yasuhiro Kubo
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Patent number: 9315729Abstract: The present invention relates to polymerizable compounds, liquid-crystalline media comprising the compounds, in particular liquid-crystal (LC) media and LC displays having a polymer-stabilised blue phase, and LC media for LC displays of the PS or PSA type (“polymer sustained” or “polymer sustained alignment”) type.Type: GrantFiled: May 15, 2012Date of Patent: April 19, 2016Assignee: Merck Patent GmbHInventors: Michael Wittek, Norihiko Tanaka, Andreas Taugerbeck
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Patent number: 9309463Abstract: The invention provides a liquid crystal compound represented by formula (1): wherein, in formula (I), for example, R1 is fluorine, chlorine, or alkyl having 1 to 10 carbons, and in the alkyl, at least one of —CH2— may be replaced by —O—, —S—, —CO— or —SiH2—, and at least one of —(CH2)2— may be replaced by —CH?CH— or —C?C—. The compound has a low threshold voltage and excellent compatibility with other liquid crystal compounds, and further excellent general physical properties required for the compound. The invention also provides a liquid crystal composition containing at least one of the compounds and having excellent properties, and a liquid crystal display device including the composition, and having a wide usable temperature range, a short response time, a large contrast ratio and a low driving voltage, and therefore can be used for a liquid crystal projector and a liquid crystal television.Type: GrantFiled: September 10, 2013Date of Patent: April 12, 2016Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventor: Yasuyuki Sasada
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Patent number: 9296949Abstract: The nematic liquid crystal composition exhibits a positive dielectric anisotropy (??), the liquid crystal composition being useful as a liquid crystal display material, and a liquid crystal display element using the same. The liquid crystal composition of the present invention has a large absolute value of dielectric anisotropy thereof and a low viscosity. By using this liquid crystal composition, it is possible to provide a liquid crystal display element which has a high contrast, high-speed responsiveness, and good display quality in which image sticking and display defects are not generated. The liquid crystal display element using the liquid crystal composition is a useful display element which realizes both high-speed response and suppression of display defects. In particular, the liquid crystal display element is useful as a liquid crystal display element for active-matrix driving, and can be applied to, for example, an IPS-type or TN-type liquid crystal display element.Type: GrantFiled: August 16, 2012Date of Patent: March 29, 2016Assignee: DIC CORPORATIONInventors: Takeshi Kuriyama, Joji Kawamura
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Patent number: 9291857Abstract: Provided is a liquid crystal display device reducing display unevenness and image sticking even though employing a PSA polymerization step in which monomers are added to a liquid crystal layer. The liquid crystal display device includes a pair of substrates, at least one of the substrates including an alignment film and a structure consisting of an organic insulating material; a polymer layer that is formed on the alignment film to control the alignment of liquid crystal molecules; and a liquid crystal layer containing a liquid crystal material, the layer being placed between the pair of substrates, wherein the polymer layer is formed by polymerization of one or more kinds of radical polymerizable monomers contained in the liquid crystal layer, and at least one kind of the radical polymerizable monomers includes a structure which generates radicals through self-cleavage reaction by light irradiation and two or more radical polymerizable groups.Type: GrantFiled: July 27, 2012Date of Patent: March 22, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Yasuyuki Ohnishi, Masanobu Mizusaki
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Patent number: 9290697Abstract: A liquid crystal orientation promoter including a compound represented by the following formula (I) is a material that exhibits a sufficient solubility, has a wide available concentration range, and exhibits excellent liquid crystal orientation promoting property [L1 to L6 represent a single bond, —O—, —CO—, —COO— and the like; Sp represents a single bond or an alkylene group having 1 to 10 carbon atoms; A1 and A2 represent a divalent aromatic hydrocarbon group or a heterocyclic group; T represents the following linking group or the like; Hb represents an alkyl fluoride group having 3 to 30 carbon atoms; k, l, m, n and p represent integers of 0 or more; and o represents an integer of 1 to 4].Type: GrantFiled: September 17, 2013Date of Patent: March 22, 2016Assignee: FUJIFILM CorporationInventors: Masatoshi Mizumura, Shunya Katoh
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Patent number: 9284435Abstract: A liquid crystalline polymer composition having a reduced tendency to create a static electric charge during a molding operation is provided. More particularly, the composition contains an ionic liquid that is distributed within a liquid crystalline polymer matrix. In addition to being electrically conductive, the ionic liquid can exist in liquid form during melt processing, which allows it to be more uniformly blended within the liquid crystalline polymer matrix. This improves electrical connectivity and thereby enhances the ability of the composition to rapidly dissipate static electric charges from its surface.Type: GrantFiled: October 14, 2013Date of Patent: March 15, 2016Assignee: Ticona LLCInventor: Young Shin Kim
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Patent number: 9284489Abstract: A method of manufacturing polymer dispersed liquid crystal includes: mixing liquid crystal, a first photopolymerizable material, a first photoinitiator, a second photopolymerizable material and a second photoinitiator to form a mixture, in which the first photoinitiator is capable to initiate polymerization of the first photopolymerizable material by irradiating a first ultraviolet light, and the second photoinitiator is capable to initiate polymerization of the second photopolymerizable material by irradiating a second ultraviolet light, and the first ultraviolet light has a wavelength different from that of the second ultraviolet light. The first photopolymerizable material is polymerized by irradiating the first ultraviolet light to form a plurality of first liquid crystal droplets. The second photopolymerizable material is polymerized by irradiating the second ultraviolet light to form a plurality of second liquid crystal droplets dispersed between the first liquid crystal droplets.Type: GrantFiled: December 19, 2013Date of Patent: March 15, 2016Assignee: CHUNGHWA PICTURE TUBES, LTD.Inventors: Jian-Hua Chen, Chun-Wei Su
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Patent number: 9279084Abstract: The invention generally relates to optically variable devices, methods of preparation and applications or uses therefor. In particular, the invention includes trigger molecules employed as a dopant for a liquid crystal material. The liquid crystal material contains helical elements having a natural twist. The dopant is effective to change the natural twist of the helical elements when the dopant is addressed with incident light. Suitable dopants are selected from binaphthalene and derivatives thereof.Type: GrantFiled: March 13, 2014Date of Patent: March 8, 2016Assignees: OPSEC SECURITY GROUP, INC., UNIVERSITY OF EAST ANGLIAInventors: Paul Dunn, Robert Edward Renton, Andrew Neil Cammidge
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Patent number: 9280022Abstract: An LCD device includes first and second substrates facing each other, a sealant formed between the first and second substrates, and adhering the first substrate to the second substrate, and a liquid crystal layer formed between the first and second substrates. The liquid crystal layer includes liquid crystal and an additive having a dipole moment characteristic when an electric field is applied thereto, thus enhancing a response time of the liquid crystal.Type: GrantFiled: May 21, 2013Date of Patent: March 8, 2016Assignee: LG DISPLAY CO., LTD.Inventors: You Hyun Eom, Yun Hee Choi
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Patent number: 9273248Abstract: This disclosure relates to a blue phase liquid crystal composite material formed by photopolymerization of material components comprising a parent blue phase liquid crystal, a photo-polymerizable monomer, a photoinitiator, and inorganic nanoparticles; and to a liquid crystal display comprising the blue phase liquid crystal composite material. The blue phase liquid crystal composite material has a low driving voltage, no electro-optical hysteresis, and rapid response time to an electric field.Type: GrantFiled: December 31, 2013Date of Patent: March 1, 2016Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Huai Yang, Ling Wang, Wanli He
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Patent number: 9268149Abstract: Provided is an optical filter and a display device. In the optical filter, patterns of first and second regions therein may be stably maintained, and therefore the optical filter capable of ensuring excellent light division characteristics for a long time may be provided.Type: GrantFiled: August 6, 2012Date of Patent: February 23, 2016Assignee: LG CHEM, LTD.Inventors: Seung Hun Chae, Kyung Ki Hong, Jung Hyun Yeo, Yong Il Cho, Moon Soo Park, Sang Seop Kim
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Patent number: 9267078Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.Type: GrantFiled: June 15, 2012Date of Patent: February 23, 2016Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Sabine Schoen
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Patent number: 9260661Abstract: There is provided a liquid crystal composition having a sufficiently low viscosity (?), a sufficiently low rotational viscosity (?1), a high elastic constant (K33), and a negative dielectric anisotropy (??), the absolute value of the negative dielectric anisotropy being large, without a reduction in the refractive index anisotropy (?n) or the nematic phase-isotropic liquid phase transition temperature (Tni) thereof. By using the liquid crystal composition, it is possible to provide a liquid crystal display element, such as a VA-type liquid crystal display element, which eliminates or reduces the risk of a faulty display and realizes high display quality and a high-speed response. The liquid crystal display element including the liquid crystal composition according to the present invention may be suitably used as a liquid crystal display element for active-matrix driving and may also be used as, for example, a VA-type or PSVA-type liquid crystal display element.Type: GrantFiled: January 16, 2014Date of Patent: February 16, 2016Assignee: DIC CORPORATIONInventors: Go Sudo, Shotaro Kawakami
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Patent number: 9260570Abstract: In some embodiments, the present disclosure provides methods of strengthening liquid crystal elastomers. In some embodiments, such methods include a step of placing the liquid crystal elastomer in an environment that applies dynamic stress to the liquid crystal elastomer. In further embodiments, the methods of the present disclosure also include a step of providing liquid crystal elastomers for placement in an environment that applies dynamic stress. In some embodiments, the liquid crystal elastomer is in a nematic phase before or during the application of dynamic stress. In some embodiments, the application of dynamic stress enhances the stiffness of the liquid crystal elastomer by more than about 10%. Further embodiments of the present disclosure pertain to liquid crystal elastomers that are made by the methods of the present disclosure.Type: GrantFiled: April 10, 2013Date of Patent: February 16, 2016Assignee: WILLIAM MARSH RICE UNIVERSITYInventors: Rafael Verduzco, Aditya Agrawal, Alin Cristian Chipara