Patents by Inventor Jouji Kawamura
Jouji Kawamura 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).
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Patent number: 10078247Abstract: The present invention relates to a liquid crystal display that incorporates a particular liquid crystal composition and a sealant in which a cured form of a particular curable resin composition is used. The present invention provides a liquid crystal display that prevents reduced voltage holding ratio (VHR) and increased ionic density (ID) in the liquid crystal layer and solves the problems of display defects such as voids, alignment irregularities, and image-sticking. Liquid crystal displays according to the present invention, featuring the ability to prevent reduced voltage holding ratio (VHR) in the liquid crystal layer and reduce the occurrence of display defects such as alignment irregularities and image-sticking, are useful particularly to liquid crystal displays in the IPS and FFS modes for active matrix drive and applicable to liquid crystal displays of equipment such as liquid crystal TVs, monitors, mobile phones, and smartphones.Type: GrantFiled: August 1, 2014Date of Patent: September 18, 2018Assignee: DIC CORPORATIONInventors: Yoshiyuki Ono, Jouji Kawamura, Yoshinori Iwashita, Hiroyuki Takeda
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Patent number: 9994772Abstract: The present invention provides a liquid crystal display device that is free from a reduction in the voltage holding ratio (VHR) of the liquid crystal layer and an increase in ion density (ID) and that enables problems of defective display, such as white spots, uneven alignment, and image-sticking, to be eliminated. In particular, the present invention provides a liquid crystal display device in which a liquid crystal composition containing a liquid crystal compound having a specific structure is used in the liquid crystal layer and in which an optically anisotropic body formed through polymerization of a polymerizable liquid crystal composition containing a specific amount of a polymerizable liquid crystal compound having a specific structure is used as an in-cell retardation layer.Type: GrantFiled: July 14, 2015Date of Patent: June 12, 2018Assignee: DIC CorporationInventors: Takeshi Kuriyama, Jouji Kawamura, Mika Yamamoto, Yasuhiro Kuwana
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Patent number: 9823517Abstract: The present invention relates to a liquid crystal display device including a specific liquid crystal composition and a sealant in which a cured product of a specific curable resin composition is used. The present invention provides a liquid crystal display device which prevents a decrease in the voltage holding ratio (VHR) of the liquid crystal layer and which enables elimination of problematic defective display such as voids, uneven alignment, and screen burn-in. Since the liquid crystal display device of the present invention prevents a decrease in the voltage holding ratio (VHR) of the liquid crystal layer and enables a reduction in defective display such as uneven alignment and screen burn-in, it is particularly useful for active-matrix liquid crystal display devices of a VA mode and PSVA mode and can be applied to liquid crystal display apparatuses such as liquid crystal TVs, monitors, mobile phones, and smartphones.Type: GrantFiled: January 21, 2014Date of Patent: November 21, 2017Assignee: DIC CORPORATIONInventors: Yoshiyuki Ono, Jouji Kawamura, Yoshinori Iwashita, Hiroyuki Takeda
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Patent number: 9810938Abstract: A liquid crystal display device that prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and that resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. The liquid crystal display has features of preventing a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and suppressing display defects such as image sticking. Therefore, the liquid crystal display device is particularly useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices of, for example, liquid crystal televisions, monitors, cellular phones, and smart phones.Type: GrantFiled: November 29, 2013Date of Patent: November 7, 2017Assignee: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Hiroshi Maki, Junichiro Koike, Masami Shishikura, Ryosuke Asami
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Publication number: 20170219860Abstract: The present invention relates to a liquid crystal display that incorporates a particular liquid crystal composition and a sealant in which a cured form of a particular curable resin composition is used. The present invention provides a liquid crystal display that prevents reduced voltage holding ratio (VHR) and increased ionic density (ID) in the liquid crystal layer and solves the problems of display defects such as voids, alignment irregularities, and image-sticking. Liquid crystal displays according to the present invention, featuring the ability to prevent reduced voltage holding ratio (VHR) in the liquid crystal layer and reduce the occurrence of display defects such as alignment irregularities and image-sticking, are useful particularly to liquid crystal displays in the IPS and FFS modes for active matrix drive and applicable to liquid crystal displays of equipment such as liquid crystal TVs, monitors, mobile phones, and smartphones.Type: ApplicationFiled: August 1, 2014Publication date: August 3, 2017Applicant: DIC CORPORATIONInventors: Yoshiyuki ONO, Jouji KAWAMURA, Yoshinori IWASHITA, Hiroyuki TAKEDA
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Publication number: 20170190972Abstract: The present invention provides a liquid crystal display device that is free from a reduction in the voltage holding ratio (VHR) of the liquid crystal layer and an increase in ion density (ID) and that enables problems of defective display, such as white spots, uneven alignment, and image-sticking, to be eliminated. In particular, the present invention provides a liquid crystal display device in which a liquid crystal composition containing a liquid crystal compound having a specific structure is used in the liquid crystal layer and in which an optically anisotropic body formed through polymerization of a polymerizable liquid crystal composition containing a specific amount of a polymerizable liquid crystal compound having a specific structure is used as an in-cell retardation layer.Type: ApplicationFiled: July 14, 2015Publication date: July 6, 2017Inventors: Takeshi Kuriyama, Jouji Kawamura, Mika Yamamoto, Yasuhiro Kuwana
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Patent number: 9624433Abstract: The present invention relates to a liquid crystal display device including a specific liquid crystal composition and a sealant containing the cured product of a specific curable resin composition. The present invention provides a liquid crystal display device which prevents a decrease in the voltage holding ratio (VHR) of the liquid crystal layer and an increase in ion density (ID) and which enables elimination of problematic defective display such as voids, uneven alignment, and screen burn-in. Since the liquid crystal display device of the present invention prevents a decrease in the voltage holding ratio (VHR) of the liquid crystal layer and enables a reduction in defective display such as uneven alignment and screen burn-in, it is particularly useful for active-matrix liquid crystal display devices of an IPS mode and FFS mode and can be applied to liquid crystal display apparatuses such as liquid crystal TVs, monitors, mobile phones, and smartphones.Type: GrantFiled: November 13, 2013Date of Patent: April 18, 2017Assignee: DIC CORPORATIONInventors: Yoshiyuki Ono, Jouji Kawamura, Yoshinori Iwashita, Hiroyuki Takeda
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Patent number: 9593280Abstract: There is provided a liquid crystal display device that may limit a reduction in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) in the liquid crystal layer and thereby address issues of faulty display such as white missing pixels, alignment inconsistencies, and burn-in. The liquid crystal display device according to the present invention, which may limit a reduction in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) in the liquid crystal layer and thereby reduce the risk of faulty display such as burn-in, can be suitably used, in particular, as an IPS-mode or FFS-mode liquid crystal display device for active-matrix driving and may also be used as a liquid crystal display device for liquid crystal display televisions, monitors, mobile phones, smart phones, or the like.Type: GrantFiled: June 18, 2013Date of Patent: March 14, 2017Assignee: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Seiji Funakura, Isao Oshiumi, Katsunori Shimada
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Publication number: 20170058160Abstract: The present invention relates to a liquid crystal display device including a particular liquid crystal composition and a cured product of a particular curable resin composition serving as a sealant. The present invention provides a liquid crystal display device that does not suffer from a decrease in the voltage holding ratio (VHR) or increase in the ion density (ID) of the liquid crystal layer or the problem of display defects such as white spots, alignment unevenness, and image-sticking.Type: ApplicationFiled: July 23, 2014Publication date: March 2, 2017Applicant: DIC CORPORATION (TOKYO)Inventors: Yoshiyuki ONO, Jouji KAWAMURA, Yoshinori IWASHITA, Hiroyuki TAKEDA
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Patent number: 9459488Abstract: The present invention provides a liquid crystal display device in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as white streaks, alignment unevenness, and image sticking are overcome. The liquid crystal display device of the present invention in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as image sticking are overcome is particularly useful for active matrix driving liquid crystal display devices with an IPS mode and an FFS mode and can be applied to liquid crystal display devices of liquid crystal televisions, monitors, cellular phones, and smart phones.Type: GrantFiled: February 21, 2013Date of Patent: October 4, 2016Assignee: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Akira Kimura, Seiji Funakura, Katsunori Shimada
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Publication number: 20160266421Abstract: The present invention relates to a liquid crystal display device including a specific liquid crystal composition and a sealant in which a cured product of a specific curable resin composition is used. The present invention provides a liquid crystal display device which prevents a decrease in the voltage holding ratio (VHR) of the liquid crystal layer and which enables elimination of problematic defective display such as voids, uneven alignment, and screen burn-in. Since the liquid crystal display device of the present invention prevents a decrease in the voltage holding ratio (VHR) of the liquid crystal layer and enables a reduction in defective display such as uneven alignment and screen burn-in, it is particularly useful for active-matrix liquid crystal display devices of a VA mode and PSVA mode and can be applied to liquid crystal display apparatuses such as liquid crystal TVs, monitors, mobile phones, and smartphones.Type: ApplicationFiled: January 21, 2014Publication date: September 15, 2016Applicant: DIC CORPORATIONInventors: Yoshiyuki Ono, Jouji Kawamura, Yoshinori Iwashita, Hiroyuki Takeda
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Patent number: 9436032Abstract: There is provided a liquid crystal display device that includes a liquid crystal composition and a color filter having a particular slope parameter that indicates the degree of aggregation of an organic pigment. The liquid crystal display device prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. The liquid crystal display device prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and suppressing display defects such as image sticking. Therefore, the liquid crystal display device is useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices.Type: GrantFiled: December 24, 2013Date of Patent: September 6, 2016Assignee: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Junichiro Koike, Hiroshi Maki, Masami Shishikura, Ryosuke Asami
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Publication number: 20160252772Abstract: The present invention provides a liquid crystal display device that prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and that resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. The liquid crystal display device of the present invention has features of preventing a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and suppressing display defects such as image sticking Therefore, the liquid crystal display device is particularly useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices of, for example, liquid crystal televisions, monitors, cellular phones, and smart phones.Type: ApplicationFiled: November 29, 2013Publication date: September 1, 2016Applicant: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Hiroshi Maki, Junichiro Koike, Masami Shishikura, Ryosuke Asami
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Publication number: 20160244667Abstract: The present invention relates to a liquid crystal display device including a specific liquid crystal composition and a sealant containing the cured product of a specific curable resin composition. The present invention provides a liquid crystal display device which prevents a decrease in the voltage holding ratio (VHR) of the liquid crystal layer and an increase in ion density (ID) and which enables elimination of problematic defective display such as voids, uneven alignment, and screen burn-in. Since the liquid crystal display device of the present invention prevents a decrease in the voltage holding ratio (VHR) of the liquid crystal layer and enables a reduction in defective display such as uneven alignment and screen burn-in, it is particularly useful for active-matrix liquid crystal display devices of an IPS mode and FFS mode and can be applied to liquid crystal display apparatuses such as liquid crystal TVs, monitors, mobile phones, and smartphones.Type: ApplicationFiled: November 13, 2013Publication date: August 25, 2016Applicant: DIC CORPORATIONInventors: Yoshiyuki Ono, Jouji Kawamura, Yoshinori Iwashita, Hiroyuki Takeda
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Patent number: 9410084Abstract: The present invention provides a liquid crystal display device that prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in the liquid crystal layer, and resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. Since a liquid crystal display device according to the present invention has a feature of preventing a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in the liquid crystal layer, and suppressing the occurrence of display defects such as image sticking, the liquid crystal display device is particularly useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices such as liquid crystal televisions, monitors, cellular phones, and smart phones.Type: GrantFiled: June 18, 2013Date of Patent: August 9, 2016Assignee: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Seiji Funakura, Katsunori Shimada
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Publication number: 20160075946Abstract: There is provided a liquid crystal display device that uses such a liquid crystal composition is also provided. Provided is a liquid crystal composition that includes a first component which is at least one selected from the group consisting of compounds represented by general formula (1) and a second component which is at least one component selected from the group consisting of compounds represented by general formula (2). Also provided is a liquid crystal display device that uses a liquid crystal composition that contains the first component and the second component.Type: ApplicationFiled: March 26, 2013Publication date: March 17, 2016Applicants: DIC CORPORATION, DIC CORPORATIONInventors: Shinji Ogawa, Yoshinori Iwashita, Jouji Kawamura, Makoto Negishi
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Patent number: 9285628Abstract: There is provided a liquid crystal display device capable of preventing a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and resolving the problem of display defects such as white spots, alignment unevenness, image sticking, and the like. The liquid crystal display device prevents a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and suppresses the occurrence of display defects such as image sticking, and the like. The liquid crystal display device is useful for an IPS-mode or FES-mode liquid crystal display device for active matrix driving. The application of the device can include liquid crystal TVs, monitors, cellular phones, smart phones, and the like.Type: GrantFiled: January 21, 2013Date of Patent: March 15, 2016Assignee: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Seiji Funakura, Katsunori Shimada
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Publication number: 20160054619Abstract: There is provided a liquid crystal display device that includes a liquid crystal composition and a color filter having a particular slope parameter that indicates the degree of aggregation of an organic pigment. The liquid crystal display device prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. The liquid crystal display device prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and suppressing display defects such as image sticking. Therefore, the liquid crystal display device is useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices.Type: ApplicationFiled: December 24, 2013Publication date: February 25, 2016Applicant: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Junichiro Koike, Hiroshi Maki, Masami Shishikura, Ryosuke Asami
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Publication number: 20160002534Abstract: There is provided a liquid crystal composition containing a compound represented by General Formula (i) (where Ri represents an alkyl group having 1 to 5 carbon atoms) and a compound represented by Formula (ii), and there is also provided a liquid crystal display device using such a liquid crystal composition.Type: ApplicationFiled: March 25, 2013Publication date: January 7, 2016Applicant: DIC CORPORATIONInventors: Jouji Kawamura, Makoto Negishi, Yoshinori Iwashita
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Publication number: 20150355499Abstract: The present invention provides a liquid crystal display device in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as white streaks, alignment unevenness, and image sticking are overcome. The liquid crystal display device of the present invention in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as image sticking are overcome is particularly useful for active matrix driving liquid crystal display devices with an IPS mode and an FFS mode and can be applied to liquid crystal display devices of liquid crystal televisions, monitors, cellular phones, and smart phones.Type: ApplicationFiled: February 21, 2013Publication date: December 10, 2015Applicant: DIC CORPORATIONInventors: Takeshi Kuriyama, Jouji Kawamura, Akira Kimura, Seiji Funakura, Katsunori Shimada