Patents by Inventor Tetsuo Kusumoto
Tetsuo Kusumoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11760934Abstract: The compound is represented by general formula (i). In the compound, in a group Ki1, at least two secondary carbon atoms in an alkyl group (a linear alkyl, halogenated alkyl, or cyanogenated alkyl group having 3 to 40 carbon atoms) are replaced with —C(?Xi1)— and/or —CH(—CN)—, where Xi1 is an oxygen atom, a sulfur atom, NH, or NR13; in addition, a group Ai2, a group Ai3, or the group Ki1 includes, as a substituent, at least one Pi1-Spi1- group, where Pi1 is a polymerizable group, and SPi1 is a spacer group or a single bond. The liquid crystal composition including the compound represented by general formula (i) can be adsorbed onto substrates between which a liquid crystal layer is held, and, consequently, without the use of an alignment film, liquid crystal molecules can be maintained in a state in which the liquid crystal molecules are aligned in a vertical direction.Type: GrantFiled: November 1, 2018Date of Patent: September 19, 2023Assignee: DIC CORPORATIONInventors: Kenta Shimizu, Masanao Hayashi, Yutaka Kadomoto, Tetsuo Kusumoto, Ayaki Hosono, Shinya Yamamoto, Masanori Miyamoto, Hidetomo Kai
-
Patent number: 11639327Abstract: The present invention provides a compound represented by formula (i), a liquid crystal composition using the compound, and a liquid crystal display device using the liquid crystal composition. The compound represented by formula (i) has a partial structure Ki1 represented by any of general formulas (K-1) to (K-17) and further has ring B having at least two P-Sp- groups. Therefore, when used for a liquid crystal composition, the compound adsorbs to substrates sandwiching the liquid crystal composition (liquid crystal layer) and allows liquid crystal molecules to be held such that they are aligned in a vertical direction without a PI layer, and improved alignment stability and low-temperature storage stability can be achieved.Type: GrantFiled: December 6, 2018Date of Patent: May 2, 2023Assignee: DIC CorporationInventors: Ayaki Hosono, Masanao Hayashi, Tetsuo Kusumoto
-
Patent number: 11345857Abstract: The spontaneous orientation aid for a liquid crystal composition provides storage stability and allows liquid crystal molecules to be vertically aligned without a PI layer when added to a liquid crystal composition. When used in a liquid crystal composition, the spontaneous orientation aid can adsorb to substrates sandwiching a liquid crystal composition (liquid crystal layer) and keep the liquid crystal molecules aligned in a vertical direction. The spontaneous orientation aid makes it possible to align liquid crystal molecules without a PI layer (to induce vertical alignment of liquid crystal molecules under no applied voltage and to achieve horizontal alignment of the liquid crystal molecules under an applied voltage).Type: GrantFiled: November 17, 2020Date of Patent: May 31, 2022Assignee: DIC CORPORATIONInventors: Masaomi Kimura, Yuuichi Inoue, Hidenari Akiyama, Masanao Hayashi, Tetsuo Kusumoto
-
Publication number: 20210214299Abstract: The present invention provides a compound represented by formula (i), a liquid crystal composition using the compound, and a liquid crystal display device using the liquid crystal composition. The compound represented by formula (i) has a partial structure Ki1 represented by any of general formulas (K-1) to (K-17) and further has ring B having at least two P-Sp- groups. Therefore, when used for a liquid crystal composition, the compound adsorbs to substrates sandwiching the liquid crystal composition (liquid crystal layer) and allows liquid crystal molecules to be held such that they are aligned in a vertical direction without a PI layer, and improved alignment stability and low-temperature storage stability can be achieved.Type: ApplicationFiled: December 6, 2018Publication date: July 15, 2021Applicant: DIC CorporationInventors: Ayaki HOSONO, Masanao HAYASHI, Tetsuo KUSUMOTO
-
Publication number: 20210071084Abstract: The spontaneous orientation aid for a liquid crystal composition provides storage stability and allows liquid crystal molecules to be vertically aligned without a PI layer when added to a liquid crystal composition. When used in a liquid crystal composition, the spontaneous orientation aid can adsorb to substrates sandwiching a liquid crystal composition (liquid crystal layer) and keep the liquid crystal molecules aligned in a vertical direction. The spontaneous orientation aid makes it possible to align liquid crystal molecules without a PI layer (to induce vertical alignment of liquid crystal molecules under no applied voltage and to achieve horizontal alignment of the liquid crystal molecules under an applied voltage).Type: ApplicationFiled: November 17, 2020Publication date: March 11, 2021Applicant: DIC CORPORATIONInventors: Masaomi Kimura, Yuuichi Inoue, Hidenari Akiyama, Masanao Hayashi, Tetsuo Kusumoto
-
Patent number: 10927300Abstract: The spontaneous orientation aid for a liquid crystal composition provides storage stability and allows liquid crystal molecules to be vertically aligned without a PI layer when added to a liquid crystal composition. The spontaneous orientation aid for a liquid crystal composition includes a compound having a partial structure represented by formula (i), particularly in which Ki1 is represented by one of formula (K-1) to formula (K-11). When used in a liquid crystal composition, the spontaneous orientation aid can adsorb to substrates sandwiching a liquid crystal composition (liquid crystal layer) and keep the liquid crystal molecules aligned in a vertical direction. The spontaneous orientation aid makes it possible to align liquid crystal molecules without a PI layer (to induce vertical alignment of liquid crystal molecules under no applied voltage and to achieve horizontal alignment of the liquid crystal molecules under an applied voltage).Type: GrantFiled: October 17, 2017Date of Patent: February 23, 2021Assignee: DIC CORPORATIONInventors: Masaomi Kimura, Yuuichi Inoue, Hidenari Akiyama, Masanao Hayashi, Tetsuo Kusumoto
-
Publication number: 20200308488Abstract: The compound is represented by general formula (i). In the compound, in a group Ki1, at least two secondary carbon atoms in an alkyl group (a linear alkyl, halogenated alkyl, or cyanogenated alkyl group having 3 to 40 carbon atoms) are replaced with —C(?Xi1)— and/or —CH(—CN)—, where Xi1 is an oxygen atom, a sulfur atom, NH, or NR13; in addition, a group Ai2, a group Ai3, or the group Ki1 includes, as a substituent, at least one Pi1-Spi1- group, where Pi1 is a polymerizable group, and SPi1 is a spacer group or a single bond. The liquid crystal composition including the compound represented by general formula (i) can be adsorbed onto substrates between which a liquid crystal layer is held, and, consequently, without the use of an alignment film, liquid crystal molecules can be maintained in a state in which the liquid crystal molecules are aligned in a vertical direction.Type: ApplicationFiled: November 1, 2018Publication date: October 1, 2020Applicant: DIC CorporationInventors: Kenta Shimizu, Masanao Hayashi, Yutaka Kadomoto, Tetsuo Kusumoto, Ayaki Hosono, Shinya Yamamoto, Masanori Miyamoto, Hidetomo Kai
-
Patent number: 10723952Abstract: The present invention provides a polymerizable compound that reduces, for example, the likelihood of crystals precipitating in a polymerizable composition including the polymerizable compound and enables the polymerizable composition to have high preservation stability and a polymerizable composition including the polymerizable compound which reduces the likelihood of inconsistencies being formed in a film-like polymer produced by polymerizing the polymerizable composition. Also provided are a polymer produced by polymerizing the polymerizable composition and an optically anisotropic body including the polymer. The present invention provides the compound represented by General Formula (I), a composition including the compound, a polymer produced by polymerizing the composition, and an optically anisotropic body including the polymer.Type: GrantFiled: October 6, 2015Date of Patent: July 28, 2020Assignee: DIC CORPORATIONInventors: Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
-
Patent number: 10544365Abstract: A liquid crystal composition that has a positive dielectric anisotropy and a sufficiently low viscosity and that causes no display defects when used in liquid crystal display devices is provided without decreasing or increasing the refractive index anisotropy or nematic phase-isotropic liquid phase transition temperature. This liquid crystal composition contains at least one compound selected from compounds represented by general formula (LC0) and at least one compound selected from the group consisting of compounds represented by general formulas (LC1) to (LC5). This liquid crystal composition can be used to provide a reliable liquid crystal display device capable of maintaining a high voltage-holding ratio at high temperatures. This liquid crystal display device is highly practical as a liquid crystal display and is effective in achieving quick response without significantly decreasing the cell gap.Type: GrantFiled: August 21, 2014Date of Patent: January 28, 2020Assignee: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
-
Publication number: 20190264108Abstract: The spontaneous orientation aid for a liquid crystal composition provides storage stability and allows liquid crystal molecules to be vertically aligned without a PI layer when added to a liquid crystal composition. The spontaneous orientation aid for a liquid crystal composition includes a compound having a partial structure represented by formula (i), particularly in which Ki1 is represented by one of formula (K-1) to formula (K-11). When used in a liquid crystal composition, the spontaneous orientation aid can adsorb to substrates sandwiching a liquid crystal composition (liquid crystal layer) and keep the liquid crystal molecules aligned in a vertical direction. The spontaneous orientation aid makes it possible to align liquid crystal molecules without a PI layer (to induce vertical alignment of liquid crystal molecules under no applied voltage and to achieve horizontal alignment of the liquid crystal molecules under an applied voltage).Type: ApplicationFiled: October 17, 2017Publication date: August 29, 2019Applicant: DIC CorporationInventors: Masaomi Kimura, Yuuichi Inoue, Hidenari Akiyama, Masanao Hayashi, Tetsuo Kusumoto
-
Publication number: 20190144750Abstract: The present invention provides an improved adhesion when a polymerizable liquid crystal composition is applied to a film substrate and cured, improved storage stability of the composition when the composition is used in a PSA display device, and a liquid crystal display device having improved display characteristics. The polymerizable compound is represented by general formula (I). The invention provides an optically anisotropic film using the polymerizable compound, and a liquid crystal display device using the polymerizable compound.Type: ApplicationFiled: April 13, 2017Publication date: May 16, 2019Applicant: DIC CorporationInventors: Masanao Hayashi, Kenta Shimizu, Manabu Takachi, Tetsuo Kusumoto
-
Publication number: 20190025656Abstract: The invention provides a liquid crystal display element hardly generating drop marks at the time of producing, and having high reliability and improved properties of a liquid crystal display element such as dielectric anisotropy, viscosity, a nematic phase upper limit temperature, or rotational viscosity (?1) without deteriorating the properties of the liquid crystal display element and burn-in properties of the liquid crystal display element, and a method for producing the same. In addition, according to the invention, it is possible to effectively use the liquid crystal display element as a display element of a liquid crystal TV, a monitor, and the like, due to excellent high-response speed, a low frequency of occurrence of burn-in, a low frequency of generation of drop marks at the time of the producing, excellent properties of the liquid crystal display element, and high reliability.Type: ApplicationFiled: April 12, 2016Publication date: January 24, 2019Applicant: DIC CorporationInventors: Masanao Hayashi, Kenta Shimizu, Tetsuo Kusumoto, Yasuhiro Kuwana
-
Publication number: 20180112022Abstract: Provided are a polymerizable composition in which precipitation or the like of crystals does not occur and which has high storage stability; and a polymerizable composition in which unevenness is unlikely to occur when a film-like polymerized material obtained by polymerizing the composition is prepared. Further, provided are an optically anisotropic body, a retardation film, an optical compensation film, an anti-reflective film, a lens, and a lens sheet which are formed of the polymerizable composition, a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a colorant, a security marking, a member for emitting a laser, a polarizing film, a coloring material, and a printed matter for which the polymerizable composition is used.Type: ApplicationFiled: January 14, 2016Publication date: April 26, 2018Applicant: DIC CorporationInventors: Toru Ishii, Yasuhiro Kuwana, Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
-
Publication number: 20180066189Abstract: Provided are a polymerizable composition in which precipitation or the like of crystals does not occur and which has high storage stability; and a polymerizable composition in which unevenness is unlikely to occur when a film-like polymerized material obtained by polymerizing the composition is prepared. Further, provided are an optically anisotropic body, a retardation film, an optical compensation film, an anti-reflective film, a lens, and a lens sheet which are formed of the polymerizable composition, a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a colorant, a security marking, a member for emitting a laser, a polarizing film, a coloring material, and a printed matter for which the polymerizable composition is used.Type: ApplicationFiled: January 14, 2016Publication date: March 8, 2018Applicant: DIC CorporationInventors: Toru Ishii, Yasuhiro Kuwana, Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
-
Publication number: 20170306233Abstract: The present invention provides a polymerizable compound that reduces, for example, the likelihood of crystals precipitating in a polymerizable composition including the polymerizable compound and enables the polymerizable composition to have high preservation stability and a polymerizable composition including the polymerizable compound which reduces the likelihood of inconsistencies being formed in a film-like polymer produced by polymerizing the polymerizable composition. Also provided are a polymer-produced by polymerizing the polymerizable composition and an optically anisotropic body including the polymer. The present invention provides the compound represented by General Formula (I), a composition including the compound, a polymer produced by polymerizing the composition, and an optically anisotropic body including the polymer.Type: ApplicationFiled: October 6, 2015Publication date: October 26, 2017Applicant: DIC CorporationInventors: Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
-
Patent number: 9688787Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.Type: GrantFiled: August 14, 2015Date of Patent: June 27, 2017Assignee: DIC CORPORATIONInventors: Tetsuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
-
Patent number: 9683174Abstract: [Object] To provide a liquid crystal alignment layer that can easily be formed, to which an anchoring force can be efficiently induced with less polarized light for exposure, and that is effective in controlling the orientation and pretilt angle of liquid crystal molecules, and a compound and polymer that can be used for such a liquid crystal alignment layer.Type: GrantFiled: November 27, 2014Date of Patent: June 20, 2017Assignee: DIC CORPORATIONInventors: Hiroshi Hasebe, Kazunori Maruyama, Fumiaki Kodera, Kunihiko Kotani, Sayaka Nose, Yoshio Aoki, Tetsuo Kusumoto
-
Patent number: 9637466Abstract: The present invention relates to a compound having 2,6-difluorophenyl ether structure and useful as an organic electronic material and a medicine/agrochemical, particularly a material for liquid crystal display devices, and also relates to an effective method for producing the same. The present invention provides a compound represented by general formula (1) and also provides a liquid crystal composition containing the compound and a liquid crystal display device using the liquid crystal composition. A liquid crystal composition exhibiting low viscosity and a liquid crystal phase within a wide temperature range can be produced by using the compound represented by the general formula (1) as a component of the liquid crystal composition. Thus, the compound is very useful as a constituent component of a liquid crystal composition for a liquid crystal display device required to have, fast response.Type: GrantFiled: July 15, 2014Date of Patent: May 2, 2017Assignee: DIC CORPORATIONInventors: Kenta Tojo, Tetsuo Kusumoto
-
Patent number: 9605208Abstract: A liquid crystal composition exhibits a positive dielectric anisotropy and sufficiently low viscosity without decreasing or increasing refractive index anisotropy or nematic phase-isotropic liquid phase transition temperature, and does not cause display failures. The liquid crystal composition contains one or more compounds selected from compounds represented by general formula (LC0) and one or more compounds selected from a group of compounds represented by general formula (LC1) to general formula (LC5), in which the liquid crystal composition contains one or more compounds in which at least one of A01, A02, and A11 to A42 in general formulae (LC0) to (LC4) represents a tetrahydropyran-2,5-diyl group.Type: GrantFiled: July 24, 2013Date of Patent: March 28, 2017Assignee: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
-
Patent number: 9587175Abstract: The present invention relates to a nematic liquid crystal composition useful as an electro-optic liquid crystal display material and having a positive dielectric anisotropy (??). The liquid crystal composition has refractive index anisotropy (?n) adjusted to a desired level, a sufficiently low viscosity (?), and a positive dielectric anisotropy (??) while degradation of the temperature range of the nematic phase is avoided by suppressing the decrease in nematic phase-isotropic liquid phase transition temperature (Tni) and the increase in lower limit temperature of the nematic phase. The liquid crystal composition contains one or more compounds selected from compounds represented by general formula (LC0) and one or more compounds selected from a group of compounds represented by general formula (LC1) to general formula (LC5).Type: GrantFiled: July 24, 2013Date of Patent: March 7, 2017Assignee: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto