Patents by Inventor Kazuhiro Oki

Kazuhiro Oki 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: 8936837
    Abstract: The method includes: forming a coating film including particles and an ultraviolet curable resin on a film substrate; and curing the ultraviolet curable resin by ultraviolet irradiation to form an anti-glare layer constituted by the particles and the ultraviolet curable resin. A ratio of a thickness A of the anti-glare layer to a diameter B of the particles is in the range of 1.5 to 2.4. The ultraviolet irradiation is performed with two or more ultraviolet irradiation units, the first unit irradiation amount is 49 mJ/cm2 or less, the second and subsequent units irradiation amount is greater than 50 mJ/cm2, and the total irradiation amount is 100 mJ/cm2 or greater. The oxygen concentration at a position which is 1 mm above a surface of the coating film is 1 ppm to 2000 ppm. The first unit irradiation is performed above a roller with surface temperature of 10° C. to 24° C.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: January 20, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Hideaki Kagawa, Takahiro Nakazawa, Kazuhiro Oki
  • Patent number: 8932669
    Abstract: A method for producing an antiglare film includes: a step of preparing coating liquids comprising components capable of being unevenly distributed in an antiglare layer-forming coating liquid and a low-refractive index layer-forming coating liquid, respectively; a coating step of applying the low-refractive index layer-forming coating liquid as an upper layer and the antiglare layer-forming coating liquid as a lower layer on a support to form a coating layer; and a drying step of drying the coating layer and making the coating layer cause phase-separation so as to unevenly distribute the components and form an antiglare layer and a low-refractive index layer. By the production method, an antiglare film which suppresses reflection and glaring of external light in a display and whitening due to irregular reflection can be produced at a low cost.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: January 13, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Yuuki Saiki, Kazuhiro Shiojiri, Kazuhiro Oki
  • Patent number: 8848145
    Abstract: A light reflective film is produced by (a) forming a hard coat layer having a surface energy of less than 30 mN/m and a pencil hardness of at least 2H on a resin film, (b) applying a curable liquid crystal composition onto the surface of the opposite side, (c) drying the applied curable liquid crystal composition to be in a state of a cholesteric liquid crystal phase, (d) promoting the curing reaction to form a light reflective layer, and (e) repeating at least once the process of from (b) to (d).
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: September 30, 2014
    Assignee: Fujifilm Corporation
    Inventors: Kazuhiro Oki, Takao Taguchi
  • Patent number: 8846139
    Abstract: A coating apparatus includes: a slot die configured to apply coating solution on a support by discharging the coating solution from a tip of a slot and forming a coating solution bead in a clearance between the tip of the slot and the support; a pipe through which the coating solution is fed to a pocket of the slot die; an orifice formed in the pipe at a position nearer a circumference of a circular cross section in a radial direction of the pipe in relation to a center of the circular cross section; a forward tapered inlet channel which is formed at an entrance side of the orifice in the pipe and whose aperture narrows to the orifice; a rearward tapered outlet channel which is formed at an exit side of the orifice in the pipe and whose aperture grows toward a downstream.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: September 30, 2014
    Assignee: Fujifilm Corporation
    Inventors: Kenichi Yasuda, Ryousuke Shimizu, Kazuhiro Oki
  • Patent number: 8842241
    Abstract: A light reflective film is produced by (a) forming an antistatic layer having a surface energy of at least 30 mN/m on a resin film, (b) applying a curable liquid crystal composition onto the surface of the opposite side, (c) drying the applied curable liquid crystal composition to be in a state of a cholesteric liquid crystal phase, (d) promoting the curing reaction to form a light reflective layer, and (e) repeating at least once the process of from (b) to (d).
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: September 23, 2014
    Assignee: Fujifilm Corporation
    Inventors: Kazuhiro Oki, Takao Taguchi
  • Publication number: 20140253860
    Abstract: Provided is a method of producing a film including: a coating step of coating, on a substrate, a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound, an alignment controlling agent capable of controlling alignment of the polymerizable liquid crystal compound, a polymerization initiator and coated film a solvent; and a drying step of drying, wherein the alignment controlling agent is a compound represented by formula (1) below, and the alignment controlling agent is added in 0.005 to 0.2 parts by mass relative to 100 parts by mass of the polymerizable liquid crystal compound: In general formula (1), each of L1 and L2 represents an alkylene group having 1 to 6 carbon atoms that may be substituted with a fluorine atom or the like, and n1 and n2 represents integers of 3 or more.
    Type: Application
    Filed: May 23, 2014
    Publication date: September 11, 2014
    Applicant: FUJIFILM CORPORATION
    Inventors: Wataru MAJIMA, Kazuhiro OKI, Hirotoshi ANDOU
  • Patent number: 8828501
    Abstract: A coating solution is applied to a web to form a coating layer. Then the web is transported into a drying apparatus, in which a guide roller guides the web such that an angle of the web to a horizontal direction is smaller downstream from the guide roller. The angles at entrance and exit of the drying apparatus are named entrance and exit angles ?1, ?3, respectively, and satisfy a condition ?1>?3. The coating layer has the temperature T1 at the entrance, the temperature T2 at the exit, and the temperature T3 in the drying apparatus. The differences |T2?T1| and |T3?T1| are at most 5° C. In the drying apparatus, as the organic solvent evaporates uniformly, the generation of the unevenness is reduced. Thereafter, the drying is made at the large drying speed in the blow-drying apparatus to obtain a film product.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: September 9, 2014
    Assignee: Fujifilm Corporation
    Inventors: Kazuhiro Oki, Takeshi Kitaoka
  • Patent number: 8808795
    Abstract: A method of producing a laminate film includes coating a support with coating solutions with at least two monolayer extrusion dies to provide layers. A difference in solubility parameter between the coating solution and a solute in the adjoining layer ?0.1 for respective coating solutions. Viscosity of the downstream side die coating solution is lower than that of an upstream side die. Each coating solution has a Capillary number Ca<1.7. A difference in surface tension |?2??1| between the adjoining layers satisfies |?2??1|>0.5 [mN/m], where ?1, ?2 are surface tensions of coating solution from upstream and downstream side dies, respectively. A ratio of a coating thickness h1 [?m] of the coating solution for an upper layer and a distance L [?m] of the upper layer from the support surface satisfies h1/L<0.14. Distance between discharge nozzles is ?1 mm and ?700 mm.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: August 19, 2014
    Assignee: Fujifilm Corporation
    Inventors: Ryochi Higashi, Kazuhiro Oki
  • Patent number: 8711307
    Abstract: A heat shield comprising a first light-reflective layer, having a reflectance peak both in a wavelength range of from 400 nm to less than 850 nm and in a wavelength range of from more than 850 nm to 1300 nm and satisfying C>A>B, is disclosed. “A” means the maximum reflectance in the wavelength range of from 400 nm to less than 850 nm; “B” means the reflectance at a wavelength of 850 nm; “C” means the maximum reflectance in the wavelength range of from more than 850 nm to 1300 nm; and “B” is equal to or less than 50%.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: April 29, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Kazuhiro Oki, Wataru Majima, Mitsuyoshi Ichihashi, Yuichi Shirasaki
  • Patent number: 8704981
    Abstract: Provided is a method of producing a light-reflective film that can prevent the blocking of a liquid crystal layer and a support without lowering transparency of the film. The method includes a step of coating a curable liquid crystal composition that contains a curable cholesteric liquid crystal compound onto one surface of a support of which a surface roughness Ra of the other surface thereof is 4.5 nm to 25 nm; a step of aligning the curable cholesteric liquid crystal compound to make a state of a cholesteric liquid crystal phase aligned by heating the coated curable liquid crystal composition; a step of irradiating in which a light-reflecting layer where the cholesteric liquid crystal phase has been fixed is formed by advancing a curing reaction of the curable liquid crystal composition; and a step of charging the support and the light-reflecting layer with the same polarity.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: April 22, 2014
    Assignee: Fujifilm Corporation
    Inventors: Takao Taguchi, Kazuhiro Oki
  • Patent number: 8648996
    Abstract: A method of producing a light-reflecting film having a light-reflecting layer on a resin film and reflecting 30% or more of incident light of a wavelength in the range of 800 to 2000 nm, includes a step of curing a cholesteric liquid crystal phase to form the light-reflecting layer, the cholesteric liquid crystal phase is obtained by mixing a chiral agent having an HTP of 30 ?m?1 or more expressed by Expression 1 into a starting solution by an in-line mixing method while supplying the starting solution prepared by dissolving a curable liquid crystal compound in a solvent, coating the resin film with the resultant coating solution, and drying the resultant.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: February 11, 2014
    Assignee: Fujifilm Corporation
    Inventor: Kazuhiro Oki
  • Patent number: 8575228
    Abstract: An agent comprising a substituted aromatic azo compound is capable of making a liquid surface express anisotropy in a simplified manner.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: November 5, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Kazuhiro Oki, Michitaka Matsuumi, Mitsuyoshi Ichihashi
  • Patent number: 8491968
    Abstract: A process for production of a functional film comprises a coating liquid preparation step (12) of preparing a coating liquid; an application step (14) of applying a monolayer of the prepared coating liquid onto a substrate (18); and a drying step (16) of drying the applied coated layer. At the coating liquid preparation step (12), a plurality of solute materials are contained in at least one solvent; and when D11 is a main diffusion coefficient of a solute material A having functionality of the plurality of solute materials A and B and D22 is a main diffusion coefficient of the other solute material B, the other solute material B is selected so that an inequality A D11<D22 is satisfied; and at the drying step (16), the solute material A having functionality is unevenly distributed in the film surface.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: July 23, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Kazuhiro Oki
  • Patent number: 8425984
    Abstract: According to a manufacturing method of a multilayer film according to one aspect of the present invention, at the step of applying a coating liquid prepared by dissolving a plurality of monomers or polymers in at least one solvent onto a substrate and subsequently drying the coating liquid, the solvent is allowed to penetrate into the substrate at a specified speed. This causes concentration distribution of the solvent within the coated layer in the thickness direction thereof, and thus a multilayer film separated into an upper layer and a lower layer can be formed by one coating. Accordingly, a multilayer film having a different function in each layer can be formed by one coating.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: April 23, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Kazuhiro Oki, Kazuhiro Shiojiri
  • Patent number: 8420178
    Abstract: A liquid sending method comprises the steps of sending a coating solution to a liquid sending pipe, passing the coating solution to an orifice which is provided at a part of the liquid sending pipe to prevent a vibration propagation and passing the coating solution to a pulsation absorb device which is provided at a part of the liquid sending pipe where is located at a downstream of the orifice, wherein the pulsation absorb device includes a first chamber that a liquid can flow in and out, a second chamber which is introduced a gas, and a diaphragm which separates the first chamber and the second chamber.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: April 16, 2013
    Assignee: Fujifilm Corporation
    Inventors: Kenichi Yasuda, Hitoshi Satou, Kazuhiro Oki
  • Patent number: 8416375
    Abstract: A process for producing a light-reflective film is disclosed. The process comprises (a) applying a curable liquid crystal composition to a first film having a thickness of d1; (b) drying the applied curable liquid crystal composition to form a cholesteric liquid crystal phase; (c) carrying out a curing reaction of the curable liquid crystal composition and fixing the cholesteric liquid crystal phase to form a lower layer; (d) repeating the set of the steps (a)-(c) three or more times on the lower layer to form a light-reflective multilayer having four or more layers of a fixed cholesteric liquid crystal phase; and (e) transferring the light-reflective multilayer, formed on the first film, onto a second film having a thickness of d2 which is smaller than d1; wherein the first film, fulfilling the condition of formula (1), is used. ( d 1 ) 2 × ( Y 1 ) ( d 3 ) × ( 1 - P 1 ) ? 0.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: April 9, 2013
    Assignee: Fujifilm Corporation
    Inventor: Kazuhiro Oki
  • Patent number: 8305529
    Abstract: A process for producing an optical compensation film comprises a liquid crystal layer application step (10) of applying a liquid crystal layer coating solution containing a liquid crystal compound to an alignment layer on a surface of a transparent substrate (4c) that is continuously transported; a liquid crystal layer drying step (11) of drying the liquid crystal layer; a cooling and curing step of curing the liquid crystal layer while cooling the liquid crystal layer to a temperature lower than a drying temperature used in the drying step; and a heating and curing step of curing the alignment layer while heating the alignment layer to a temperature higher than a cooling temperature used in the cooling and curing step. The process enables the durability and damage resistance as well as the optical characteristics of the optical compensation film to be independently controlled.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: November 6, 2012
    Assignee: Fujifilm Corporation
    Inventors: Kazuhiro Oki, Hirokazu Nishimura, Akihiro Matsuoka, Kazuhiro Shiojiri, Shun Nakamura
  • Publication number: 20120245247
    Abstract: An agent comprising a substituted aromatic azo compound is capable of making a liquid surface express anisotropy in a simplified manner.
    Type: Application
    Filed: June 4, 2012
    Publication date: September 27, 2012
    Applicant: FUJIFILM CORPORATION
    Inventors: Kazuhiro OKI, Michitaka MATSUUMI, Mitsuyoshi ICHIHASHI
  • Publication number: 20120242948
    Abstract: Provided is a method of producing a light-reflective film that can prevent the blocking of a liquid crystal layer and a support without lowering transparency of the film. The method includes a step of coating a curable liquid crystal composition that contains a curable cholesteric liquid crystal compound onto one surface of a support of which a surface roughness Ra of the other surface thereof is 4.5 nm to 25 nm; a step of aligning the curable cholesteric liquid crystal compound to make a state of a cholesteric liquid crystal phase aligned by heating the coated curable liquid crystal composition; a step of irradiating in which a light-reflecting layer where the cholesteric liquid crystal phase has been fixed is formed by advancing a curing reaction of the curable liquid crystal composition; and a step of charging the support and the light-reflecting layer with the same polarity.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 27, 2012
    Applicant: FUJIFILM CORPORATION
    Inventors: Takao TAGUCHI, Kazuhiro OKI
  • Publication number: 20120225214
    Abstract: The method includes: forming a coating film including particles and an ultraviolet curable resin on a film substrate; and curing the ultraviolet curable resin by ultraviolet irradiation to form an anti-glare layer constituted by the particles and the ultraviolet curable resin. A ratio of a thickness A of the anti-glare layer to a diameter B of the particles is in the range of 1.5 to 2.4. The ultraviolet irradiation is performed with two or more ultraviolet irradiation units, the first unit irradiation amount is 49 mJ/cm2 or less, the second and subsequent units irradiation amount is greater than 50 mJ/cm2, and the total irradiation amount is 100 mJ/cm2 or greater. The oxygen concentration at a position which is 1 mm above a surface of the coating film is 1 ppm to 2000 ppm. The first unit irradiation is performed above a roller with surface temperature of 10° C. to 24° C.
    Type: Application
    Filed: March 2, 2012
    Publication date: September 6, 2012
    Applicant: FUJIFILM CORPORATION
    Inventors: Hideaki KAGAWA, Takahiro NAKAZAWA, Kazuhiro OKI