Patents by Inventor Takeshi Itoi

Takeshi Itoi 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).

  • Publication number: 20080143935
    Abstract: A color filter comprising a substrate, a red pixel, green pixel and blue pixel, each being disposed on the substrate, wherein a perpendicular optical retardation RRth of the red pixel, a perpendicular optical retardation GRth of the green pixel, and a perpendicular optical retardation BRth of the blue pixel satisfy the following formulas (1) and (2): |(RRth?BRth)|?|(GRth?BRth)|?0 ??(1) |(RRth?BRth)|?|(RRth?GRth)|?0 ??(2) wherein RRth, GRth and BRth represent, respectively, a product of a thickness [nm] of a pixel and a value obtained by subtracting a value of thickness-wise refractive index from an average value of an in-plane refractive index of each of these pixels.
    Type: Application
    Filed: December 19, 2007
    Publication date: June 19, 2008
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Sosuke Akao, Koichi Minato, Satoshi Ohkuma, Yoshinori Nagasaki, Takeshi Itoi, Mitsuhisa Hatashima
  • Patent number: 7361709
    Abstract: A colored composition contains a colorant carrier including a transparent resin, a precursor thereof, or a mixture of the transparent resin and the precursor, a colorant, and an organic liquid medium. The organic liquid medium consists of an organic solvent (a) having a boiling point at 760 mmHg of 100° C. or higher but lower than 160° C., and an organic solvent (b) having a boiling point at 760 mmHg of 160° C. or higher but lower than 215° C. The organic solvent (b) is contained in an amount of 3% to 35% by weight based on the total amount of the colored composition.
    Type: Grant
    Filed: May 20, 2004
    Date of Patent: April 22, 2008
    Assignees: Toyo Ink Mfg. Co., Ltd., Toppan Printing Co., Ltd.
    Inventors: Hideyo Tanaka, Takumi Saito, Takeshi Itoi, Mizuhiro Tani
  • Publication number: 20080043180
    Abstract: A color filter adapted to be employed in an in-plane switching mode liquid crystal display device, which is incorporated in the liquid crystal device without interposing electrodes between a liquid crystal and pixels, and which includes a transparent substrate, and pixels having color layers representing a plurality of colors and formed on the transparent substrate, wherein a protective layer is not formed on the pixels, and a dielectric loss tangent (tan ?) of at least one color layer is confined to not higher than 0.03 at a frequency ranging from 10 Hz to 100 Hz.
    Type: Application
    Filed: April 5, 2007
    Publication date: February 21, 2008
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Hidesato Hagiwara, Takeshi Itoi, Takumi Saito, Hiromitsu Ito
  • Patent number: 7300608
    Abstract: A blue colored composition for a color filter contains a pigment carrier comprising a transparent resin, a precursor thereof or a mixture thereof, a blue pigment having a specific surface area of 90 to 140 m2/g, and a violet pigment having a specific surface area in a range of 100 to 150 m2/g, but having a greater specific surface area than that of the blue pigment used. A color filter includes a filter segment formed from the blue colored composition.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: November 27, 2007
    Assignees: Toyo Ink Mfg. Co., Ltd., Toppan Printing Co., Ltd.
    Inventors: Kenro Sunahara, Mayumi Ogura, Ichiro Toyoda, Takumi Saito, Hidesato Hagiwara, Takeshi Itoi, Hiromitsu Ito
  • Patent number: 7288345
    Abstract: A photosensitive colored composition contains a resin, a monomer and a colorant. The resin is a copolymer resin of at least one compound (a) represented by general formula (I) below with at least one other compound (b) having an ethylenically unsaturated double bond: where R1 represents H or CH3, R2 represents an alkylene group having 2 or 3 carbon atoms, R3 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms which may contain a benzene ring, and n is an integer of 1 to 15.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: October 30, 2007
    Assignees: Toyo Ink Mfg. Co., Ltd., Toppan Printing Co., Ltd.
    Inventors: Yukiyoshi Jonoshita, Tadashi Tanoue, Takeshi Itoi, Mizuhiro Tani
  • Publication number: 20070202272
    Abstract: A red-colored film in which when an elliptically polarized light is incident on the film in a direction 45° aslant from a normal line direction with respect to a surface of the film, a light transmitted through the film has an average amplitude transmittance ratio (av. tan ?) in a wavelength region of 575 to 635 nm, which satisfies the following equation (1): 0.960<av. tan ?<1.040 ??(1). A red-colored composition contains a red pigment A having a BET specific surface area in the range from 90 to 140 m2/g, a red pigment B having a BET specific surface area in the range from 70 to 85 m2/g, and a pigment carrier formed of a transparent resin, a precursor of the transparent resin or a mixture of the tarns parent resin and precursor thereof. A color filter has the red-colored film as a red color filter segment. The liquid crystal display device includes the color filter.
    Type: Application
    Filed: June 29, 2006
    Publication date: August 30, 2007
    Applicants: TOYO INK CO., LTD., TOPPAN PRINTING CO., LTD.
    Inventors: Masayuki Yamamoto, Akira Hirano, Hideyo Tanaka, Yusuke Iida, Satoshi Ohkuma, Koichi Minato, Takeshi Itoi, Hidesato Hagiwara
  • Patent number: 7220534
    Abstract: A photosensitive composition contains a photosensitive resin and a colorant. The photosensitive resin includes (A) a copolymer of (a1) at least one first polymerizable monomer containing 2 to 6 hydroxyl groups with (a2) at least one second polymerizable monomer other than the first polymerizable monomer, and (B) at least one compound (B) containing an ethylenically unsaturated double bond and a functional group capable of reacting with hydroxyl group. The compound (B) has been reacted with the copolymer (A). A color filter has at least one filter segment formed using the photosensitive composition.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: May 22, 2007
    Assignees: Toyo Ink Mfg. Co., Ltd., Toppan Printing Co., Ltd.
    Inventors: Fumiko Ikegami, Mie Shimizu, Takeshi Itoi
  • Publication number: 20060222969
    Abstract: A photosensitive colored composition contains a resin, a monomer and a colorant. The resin is a copolymer resin of at least one compound (a) represented by general formula (I) below with at least one other compound (b) having an ethylenically unsaturated double bond: where R1 represents H or CH3, R2 represents an alkylene group having 2 or 3 carbon atoms, R3 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms which may contain a benzene ring, and n is an integer of 1 to 15.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 5, 2006
    Applicants: TOYO INK MFG. CO., LTD., TOPPAN PRINTING CO., LTD.
    Inventors: Yukiyoshi Jonoshita, Tadashi Tanoue, Takeshi Itoi, Mizuhiro Tani
  • Publication number: 20050219443
    Abstract: A color filter is provided with red, green and blue color filter segments. When chromaticity coordinates (x, y) in a chromaticity diagram of XYZ color specification system are measured with the color filter being sandwiched between two polarizers, a chromaticity (xp, yp) of parallel-transmitted light and a chromaticity (xc, yc) of orthogonal-transmitted light satisfy the following formula (1): ?xy=[(xp?xc)2+(yp?yc)2]1/2<0.130??(1) A liquid crystal display device is provided with such a color filter.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 6, 2005
    Applicants: TOYO INK MFG. CO., LTD., TOPPAN PRINTING CO., LTD.
    Inventors: Hideyo Tanaka, Hidesato Hagiwara, Takeshi Itoi, Takumi Saito, Koichi Minato
  • Publication number: 20050215675
    Abstract: A colored composition for color filter contains a pigment carrier made of a transparent resin, a precursor thereof, or a mixture thereof, an organic pigment, and a pigment-dispersing agent comprising a quinoline derivative represented by the following General formula (1) or (2), or an amine or metal salt thereof, and a color filter comprises filter segments formed with the color composition: where X represent a halogen atom selected from chlorine, bromine and iodine; n and m each independently represent the number of halogen atoms X, and are each an integer of 0 to 4.
    Type: Application
    Filed: February 22, 2005
    Publication date: September 29, 2005
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Atsushi Nishida, Toru Omura, Takashi Yamauchi, Takeshi Itoi
  • Publication number: 20050131114
    Abstract: A blue colored composition for a color filter contains a pigment carrier comprising a transparent resin, a precursor thereof or a mixture thereof, a blue pigment having a specific surface area of 90 to 140 m2/g, and a violet pigment having a specific surface area in a range of 100 to 150 m2/g, but having a greater specific surface area than that of the blue pigment used. A color filter includes a filter segment formed from the blue colored composition.
    Type: Application
    Filed: December 16, 2004
    Publication date: June 16, 2005
    Applicants: TOYO INK MFG. CO., LTD., TOPPAN PRINTING CO., LTD.
    Inventors: Kenro Sunahara, Mayumi Ogura, Ichiro Toyoda, Takumi Saito, Hidesato Hagiwara, Takeshi Itoi, Hiromitsu Ito
  • Publication number: 20050112501
    Abstract: A photosensitive composition contains a photosensitive resin and a colorant. The photosensitive resin includes (A) a copolymer of (a1) at least one first polymerizable monomer containing 2 to 6 hydroxyl groups with (a2) at least one second polymerizable monomer other than the first polymerizable monomer, and (B) at least one compound (B) containing an ethylenically unsaturated double bond and a functional group capable of reacting with hydroxyl group. The compound (B) has been reacted with the copolymer (A). A color filter has at least one filter segment formed using the photosensitive composition.
    Type: Application
    Filed: November 24, 2004
    Publication date: May 26, 2005
    Applicants: TOYO INK MFG. CO., LTD., TOPPAN PRINTING CO., LTD.
    Inventors: Fumiko Ikegami, Mie Shimizu, Takeshi Itoi
  • Publication number: 20040236006
    Abstract: A colored composition contains a colorant carrier including a transparent resin, a precursor thereof, or a mixture of the transparent resin and the precursor, a colorant, and an organic liquid medium. The organic liquid medium consists of an organic solvent (a) having a boiling point at 760 mmHg of 100° C. or higher but lower than 160° C., and an organic solvent (b) having a boiling point at 760 mmHg of 160° C. or higher but lower than 215° C. The organic solvent (b) is contained in an amount of 3% to 35% by weight based on the total amount of the colored composition.
    Type: Application
    Filed: May 20, 2004
    Publication date: November 25, 2004
    Applicants: TOYO INK MFG. CO., LTD., TOPPAN PRINTING CO., LTD.
    Inventors: Hideyo Tanaka, Takumi Saito, Takeshi Itoi, Mizuhiro Tani
  • Patent number: 6339288
    Abstract: A substrate for an organic electroluminescence display element comprises a support (11), a plurality of first electrode lines (12) arranged apart from each other on the support (11), and a plurality of partition walls (13) arranged apart from each other and extending in a direction to cross the first electrode lines (12). Each of the partition walls (13) has eaves in an upper portion and flared side surfaces in a lower portion.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: January 15, 2002
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Yifan Qian, Mamoru Ishizaki, Takeshi Itoi, Mizuhiro Tani, Takao Minato, Yuichi Ito, Teruhiko Kai
  • Patent number: 5897606
    Abstract: In a method for storing vibration waveform data sequentially detected by a vibration sensor. The vibration storing method includes detection of a reference level terminal point (P.sub.3) between a preestablished reference level and a vibration waveform. The detected reference level terminal point serves as a trigger. Also, vibration waveform data from a predetermined point (P.sub.0) before a reference level starting point (P.sub.1) to a predetermined point (P.sub.4) after the reference level terminal point (P.sub.3) are stored in a memory. A first preliminary memory and a second preliminary memory are utilized so that the vibration waveform data from those two memories are alternately transferred and stored.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: April 27, 1999
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventors: Shinsuke Miura, Takeshi Itoi, Shuichi Yabushita
  • Patent number: 5701257
    Abstract: A shock measuring method for detects shocks during transportation by a sensor and stores such detected shock data. The shock measuring method in goods transportation being characterized in that measuring conditions 1, 2, . . . n whose sequential order is pre-established are progressively fed in accordance with the sequential order for each transportation section, and shock data for each transportation section measured under each measuring condition 1, 2, . . . n for each transportation section are stored in accordance with the sequential order.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: December 23, 1997
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventors: Shinsuke Miura, Takeshi Itoi, Shuichi Yabushita