Patents by Inventor Takafumi Hara
Takafumi Hara 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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Publication number: 20110261108Abstract: According to one embodiment, a decolorizable water-based inkjet ink includes a color material, a solvent, and a nonionic surfactant. The color material contains a color developable compound and a color developing agent, and the solvent contains water and a water-soluble organic solvent. The nonionic surfactant is contained in the ink in an amount of 5 wt % or more of the total amount of the solvent.Type: ApplicationFiled: April 20, 2011Publication date: October 27, 2011Applicant: TOSHIBA TEC KABUSHIKI KAISHAInventors: Takayasu Aoki, Takafumi Hara, Tsuyoshi Itou
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Publication number: 20110242434Abstract: A backlight unit 12 includes a chassis 14, a cold cathode tube 17, and a lamp clip 18. The chassis 14 has mounting holes 32 and 33. The cold cathode tube 17 is arranged inside the chassis 14. The lamp clip 18 is mounted to the chassis 14 through the mounting holes 32 and 33. The lamp clip 18 holds the cold cathode tube 17. The lamp clip 18 includes main body 27 and mounting parts 30 and 31. The main body 27 is arranged inside the chassis 14. Each mounting part 30/31 includes a base portion 30a/31a and a holding portion 30b/31b. The base portion 30a/31a projects from the main body 27 to the outside of the chassis 14 through the mounting hole 32/33. The holding portion 30b/31b projects from the base portion 30a/31a and extends along the main body 27. An edge of each mounting hole 32/33 is sandwiched between the main body 27 and the holding portion 30b/31b. The chassis 14 includes contact portions 43 and receiving portions 39 and 40 for receiving the mounting parts 30 and 31, respectively.Type: ApplicationFiled: August 11, 2009Publication date: October 6, 2011Applicant: SHARP KABUSHIKI KAISHAInventors: Yasunari Hisada, Takafumi Hara, Kazuyuki Ono, Hisanori Inagaki
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Patent number: 8029962Abstract: A developing agent including a core containing an amorphous polyester resin and a fatty acid ester based wax, a shell provided on the surface of the core and containing a copolymer of an aromatic vinyl monomer and acrylic acid or an acrylic ester, and a coloring agent.Type: GrantFiled: May 13, 2008Date of Patent: October 4, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Takayasu Aoki, Motonari Udo, Masahiro Ikuta, Tsuyoshi Itou, Takashi Urabe, Takafumi Hara, Satoshi Araki, Yasuhito Noda
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Publication number: 20110221978Abstract: A backlight unit 12 includes a chassis 14, a cold cathode tube 17, and a lamp clip 18. The chassis has mounting holes 32 and 33. The cold cathode tube 17 is arranged inside the chassis 14. The lamp clip 18 is mounted to the chassis 14 through the mounting holes 32 and 33. The lamp clip 18 holds the cold cathode tube 17. The lamp clip 18 includes main body 27 and mounting parts 30 and 31. The main body 27 is arranged inside the chassis 14. The mounting parts 30 and 31 include base portions 30a and 31a, and holding portions 30b and 31b. The base portions 30a and 31a project from the main body 27 to the outside of the chassis 14 through the mounting holes 32 and 33. The holding portions 30b and 31b project from the base portions 30a and 31a along the main body 27. Edges of the mounting holes are sandwiched between the main body 27 and the holding portions 30b and 31b. The chassis 14 has receiving portions 39 and 40 for receiving the mounting parts 30 and 31.Type: ApplicationFiled: July 23, 2009Publication date: September 15, 2011Applicant: SHARP KABUSHIKI KAISHAInventors: Yasunari Hisada, Takafumi Hara, Kazuyuki Ono, Hisanori Inagaki
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Patent number: 8012661Abstract: A method for producing a developing agent contains mechanically shearing a mixture containing a polyester resin, a colorant and a releasing agent to form first fine particles, aggregating the first fine particles to form aggregated particles as a core, aggregating second fine particles containing a polyester resin onto the core to form a shell.Type: GrantFiled: October 29, 2008Date of Patent: September 6, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Motonari Udo, Takayasu Aoki, Takashi Urabe, Tsuyoshi Itou, Yasuhito Noda, Satoshi Araki, Masahiro Ikuta, Takafumi Hara
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Publication number: 20110148977Abstract: According to one embodiment, an inkjet emulsion ink includes an aqueous liquid, a color pigment dispersed in the aqueous liquid, an oil liquid, a white pigment dispersed in the oil liquid, and polyvinyl alcohol. The aqueous liquid content of the inkjet emulsion ink is WAQ, and the oil liquid content of the inkjet emulsion ink is WOL. The color pigment is at least one selected from the group consisting of a magenta pigment, a cyan pigment, a yellow pigment, and a black pigment. The oil liquid is at least partly an aromatic alcohol represented by general formula A below. The polyvinyl alcohol is represented by general formula B below. where Ra represents an aliphatic hydrocarbon group having 1 to 5 carbon atoms, Rb represents —O— or —CH2O—, and k represents 0 or 1. wherein n and m satisfy 0.4?n/(n+m)?0.73.Type: ApplicationFiled: December 14, 2010Publication date: June 23, 2011Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Ryozo Akiyama, Takafumi Hara, Maiko Yoshida
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Publication number: 20110148978Abstract: According to one embodiment, an inkjet emulsion ink includes a pigment, an aqueous liquid, an oil liquid, and a polyoxyethylene hydrogenated castor oil. The polyoxyethylene hydrogenated castor oil emulsifies the aqueous liquid and the oil liquid. The oil liquid is at least partly an aliphatic monoalcohol having 6 to 9 carbon atoms.Type: ApplicationFiled: December 14, 2010Publication date: June 23, 2011Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Ryozo Akiyama, Maiko Yoshida, Takafumi Hara
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Patent number: 7960086Abstract: A coarse particle containing a polyester based resin and a coloring agent is added in an aqueous medium containing a surfactant, a basic substance and an inorganic water-soluble electrolyte, and dispersion and coagulation are carried out to form a toner particle.Type: GrantFiled: November 6, 2008Date of Patent: June 14, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Takayasu Aoki, Takashi Urabe, Takafumi Hara, Tsuyoshi Itou, Masahiro Ikuta, Motonari Udo, Yasuhito Noda, Satoshi Araki, Asumi Matsumoto
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Publication number: 20110109687Abstract: According to one embodiment, an inkjet emulsion ink includes coloring material, an aqueous liquid, an oil liquid, and a polyvinyl alcohol. The aqueous liquid accounts for 10 to 40% by weight of the inkjet emulsion ink, the oil liquid accounts for 60 to 90% by weight of the inkjet emulsion ink. At least a part of the oil liquid is an aromatic alcohol represented by general formula A. The polyvinyl alcohol accounts for 0.1 to 3% by weight of the inkjet emulsion ink and is represented by general formula B. The viscosity of an aqueous solution containing 4% by weight of the polyvinyl alcohol at 20° C. is less than 10 mPa·s. where Ra represents an aliphatic hydrocarbon group having 1 to 5 carbon atoms, Rb represents —O— or —CH2O—, and k represents 0 or 1. where n and m satisfy 0.4?n/(n+m)?0.73.Type: ApplicationFiled: August 12, 2010Publication date: May 12, 2011Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida
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Patent number: 7927004Abstract: A backlight unit capable of being designed in consideration of both thermal expansion of optical sheets and positioning accuracy of the optical sheets on a backlight chassis. The backlight unit is arranged behind a display panel and includes a backlight chassis arranged to house a lamp, which includes a support surface arranged to support optical sheets, and a frame arranged to hold the optical sheets with the support surface of the backlight chassis, the optical sheets being interposed between the frame and the support surface, wherein the backlight chassis has, on its support surface, a positioning piece arranged to position the optical sheets at a predetermined position with respect to the support surface, and a position of the positioning piece corresponds to an approximate center of a longer edge of the optical sheets.Type: GrantFiled: December 20, 2005Date of Patent: April 19, 2011Assignee: Sharp Kabushiki KaishaInventors: Yoshihiro Murakami, Takeshi Ogura, Kazuki Nakamichi, Takafumi Hara, Takuya Ohnishi
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Patent number: 7901862Abstract: It is intended to provide a method includes the step of forming agglomerated particles by agglomerating fine particulate mixture containing a binder resin and a colorant. In the step of forming agglomerated particles, a cationic organic coagulating agent having an average molecular weight of from 1000 to 100000 is added to a liquid dispersion containing fine particles.Type: GrantFiled: October 2, 2008Date of Patent: March 8, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Tsuyoshi Itou, Takayasu Aoki, Takashi Urabe, Motonari Udo, Yasuhito Noda, Satoshi Araki, Masahiro Ikuta, Takafumi Hara
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Publication number: 20110014558Abstract: According to one embodiment, a method for producing a developing agent including aggregating fine particles of a toner material containing a binder resin and a coloring agent in a dispersion liquid in which the fine particles are dispersed in an aqueous medium to form aggregated particles, and washing the aggregated particles and drying the washed aggregated particles, forming toner particles is provided. An electrical conductivity of the toner particles is measured by a toner electrical conductivity evaluation method. A sample toner is prepared by adhering an additive to surfaces of the toner particles, and a content ratio of a sodium element to a carbon element in a region to which the additive is not adhered of the toner is measured. The washing of the toner particles is repeated until each of the measurement values becomes a predetermined reference value or less.Type: ApplicationFiled: July 8, 2010Publication date: January 20, 2011Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Masahiro Ikuta, Takayasu Aoki, Takashi Urabe, Tsuyoshi Itou, Motonari Udo, Satoshi Araki, Takafumi Hara, Yasuhito Noda, Taishi Takano, Yasuo Goto, Junichi Ishikawa
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Patent number: 7862874Abstract: A method for producing a welded resin material contains steps of: superimposing a resin member having transmissibility to laser light and a resin member having absorptivity to laser light to form a contact part where the resin members are in contact with each other; forming a closed space that is adjacent to the contact part and faces one end of the contact part; and radiating the laser light from the resin member having transmissibility while pressing the resin members to each other through the contact part, so as to heat the contact part to melt a resin at the contact part, housing a resin excluded from the contact part through melting in the closed space, solidifying the resin melted at the contact part to weld the resin members.Type: GrantFiled: October 5, 2007Date of Patent: January 4, 2011Assignee: Mitsubishi Electric CorporationInventors: Shinsuke Asada, Takafumi Hara, Seizo Fujimoto, Masaaki Taruya
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Patent number: 7850324Abstract: A backlight chassis that is capable of preventing an unusual noise caused by vibrations of a backlight unit or a tubular lamp houses tubular lamps arranged behind a display panel via optical sheets. The backlight chassis includes lamp holding members provided on a lamp housing surface of the backlight chassis, for holding the tubular lamps at an approximate midpoint thereof, wherein the lamp holding members and the backlight chassis are defined by a unitary molded resin member.Type: GrantFiled: December 12, 2005Date of Patent: December 14, 2010Assignee: Sharp Kabushiki KaishaInventors: Takuya Ohnishi, Satoshi Ono, Takeshi Ogura, Kazuki Nakamichi, Yoshihiro Murakami, Takafumi Hara
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Patent number: 7851120Abstract: The dispersion liquid including toner material particles is introduced into a mechanical shearing device including a heating unit, a mechanical shearing unit, and a cooling unit, heated to a temperature not lower than the glass transition temperature of the polyester resin under a condition that satisfies the following relationship (1), subjected to mechanical shearing, and thereafter cooled, whereby fine particles are obtained. ?2<log ((A+B)/C)<2??(1) With the proviso that a volume of a portion in which the dispersion liquid flows in the heating unit and the mechanical shearing unit is expressed as A cc, a volume of a portion in which the dispersion liquid flows in the cooling unit is expressed as B cc, and a flow rate of the dispersion liquid is expressed as C cc/min.Type: GrantFiled: December 9, 2008Date of Patent: December 14, 2010Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Takashi Urabe, Takayasu Aoki, Tsuyoshi Itou, Yasuhito Noda, Motonari Udo, Satoshi Araki, Masahiro Ikuta, Takafumi Hara, Asumi Matsumoto
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Publication number: 20100310981Abstract: According to one embodiment, a method for producing a developing agent includes pulverizing a mixture in the form of coarse particles of a toner material including a coloring agent and a binder resin by mechanical shearing, aggregating and fusing the resulting fine particles. The solid content concentration in a dispersion liquid including the aggregated particles is from 5.0% to 40.0%, the volume average particle diameter of the aggregated particles is from 1.0 ?m to 10.0 ?m, and the ratio of the standard deviation to the volume average particle diameter is 30.0% or less.Type: ApplicationFiled: June 2, 2010Publication date: December 9, 2010Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Junichi Ishikawa, Takayasu Aoki, Tsuyoshi Itou, Yasuhito Noda, Motonari Udo, Satoshi Araki, Masahiro Ikuta, Takafumi Hara, Takashi Urabe, Taishi Takano, Yasuo Goto
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Patent number: 7846634Abstract: A developing agent including a toner particle obtained by using a dispersion containing a solvent, a granular mixed compound having a binder resin and a coloring agent dispersed in the solvent, and, as an additive to disperse a compound, a combination of a surfactant and a basic compound or a combination of a sulfone-based surfactant and a polycarboxylic acid-based surfactant, wherein the additive remaining in the developing agent is within a predetermine range.Type: GrantFiled: November 30, 2007Date of Patent: December 7, 2010Inventors: Takashi Urabe, Satoshi Araki, Takayasu Aoki, Tsuyoshi Ito, Yasuhito Noda, Motonari Udo, Masahiro Ikuta, Takafumi Hara
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Publication number: 20100296233Abstract: An optical sheet that diffuses light is disposed on the front side of a backlight chassis supporting a fluorescent tube, a frame supporting a display panel that displays images is provided on the front side of the optical sheet, a bezel is provided on the front side of the frame, the bezel, the display panel, the frame and the optical sheet are coupled, and the bezel, the display panel, the frame and the optical sheet constitute a unit. A first reinforcing member is provided along one side of the optical sheet, a second reinforcing member opposed to the first reinforcing member is provided along one side of the backlight chassis, and a pivotal member is provided between the first reinforcing member and the second reinforcing member.Type: ApplicationFiled: September 29, 2008Publication date: November 25, 2010Applicant: Sharp Kabushiki KaishaInventors: Kouji Matsumoto, Takafumi Hara, Takeshi Ogura, Kohji Hisakawa
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Publication number: 20100209840Abstract: As a first dispersion liquid containing first fine particles and a second dispersion liquid containing second fine particles, those satisfy the relationship represented by the following formula (1) are used, and these two dispersion liquids are mixed with each other, and an aggregating agent and a pH adjusting agent are added thereto in sequence, whereby encapsulation is achieved by selective formation of core particles through aggregation of the first fine particles and shells through aggregation of the second fine particles. 15 mV?|Z2?Z1|?5 mV??(1) In the formula, Z1 and Z2 represent zeta potentials of the first dispersion liquid and the second dispersion liquid, respectively, measured when aluminum sulfate is added to each dispersion liquid in an amount of 1% by weight based on the solid content in each dispersion liquid.Type: ApplicationFiled: December 15, 2009Publication date: August 19, 2010Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Masahiro Ikuta, Takayasu Aoki, Takashi Urabe, Tsuyoshi Itou, Satoshi Araki, Motonari Udo, Takafumi Hara
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Publication number: 20100173079Abstract: One embodiment of the invention is an emulsion type inkjet ink including water, a pigment, an emulsifier, and an alcohol compound in which the alcohol compound is dispersed in water with the emulsifier. The emulsifier is a polyoxyethylene sorbitan fatty acid ester compound, and the alcohol compound is a compound including an aromatic ring and having a boiling point of 180° C. or higher.Type: ApplicationFiled: December 8, 2009Publication date: July 8, 2010Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Ryozo Akiyama, Hiroshi Kiyomoto, Takafumi Hara, Maiko Yoshida