Patents by Inventor Tsuyoshi Hotta
Tsuyoshi Hotta 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: 7727680Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: GrantFiled: March 22, 2006Date of Patent: June 1, 2010Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Patent number: 7618750Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: GrantFiled: August 16, 2006Date of Patent: November 17, 2009Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Patent number: 7579119Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: GrantFiled: January 12, 2007Date of Patent: August 25, 2009Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Patent number: 7479354Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: GrantFiled: January 12, 2007Date of Patent: January 20, 2009Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Publication number: 20070195391Abstract: A method of fabricating a hologram having a pattern made up of pixels in which a photosensitive material for forming a hologram is stacked on either a reflection-type hologram or a transmission type hologram. According to one aspect of the invention, the photosensitive material is stacked on a reflection-type relief hologram and reconstructing illumination light of a given wavelength is struck on the reflection-type relief hologram through the photosensitive material, so that interference fringes produced by interference of the light diffracted from the reflection type relief hologram and the incident light are recorded in the photosensitive material.Type: ApplicationFiled: March 30, 2007Publication date: August 23, 2007Inventors: Shingo Nishikawa, Kenji Ueda, Toshikazu Segawa, Tsuyoshi Hotta, Yuko Kuwabara, Masachika Watanabe
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Publication number: 20070115522Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: ApplicationFiled: January 12, 2007Publication date: May 24, 2007Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Publication number: 20070115521Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: ApplicationFiled: January 12, 2007Publication date: May 24, 2007Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Kenji UEDA, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Patent number: 7215451Abstract: A method of fabricating a hologram having a pattern made up of pixels in which a photosensitive material for forming a hologram is stacked on either a reflection-type hologram or a transmission type hologram. According to one aspect of the invention, the photosensitive material is stacked on a reflection-type relief hologram and reconstructing illumination light of a given wavelength is struck on the reflection-type relief hologram through the photosensitive material, so that interference fringes produced by interference of the light diffracted from the reflection type relief hologram and the incident light are recorded in the photosensitive material.Type: GrantFiled: July 16, 1998Date of Patent: May 8, 2007Assignee: Dai Nippon Printing Co., Ltd.Inventors: Shingo Nishikawa, Kenji Ueda, Toshikazu Segawa, Tsuyoshi Hotta, Yuko Kuwabara, Masachika Watanabe
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Publication number: 20060292453Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: ApplicationFiled: August 16, 2006Publication date: December 28, 2006Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Patent number: 7132200Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: GrantFiled: September 29, 1993Date of Patent: November 7, 2006Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Publication number: 20060222960Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: ApplicationFiled: March 22, 2006Publication date: October 5, 2006Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Patent number: 6667819Abstract: A reflection type color display device and a reflection type of direct-view color display device are provided. The reflection type color display device includes a spatial light modulator having a collection of pixels and a controllable transmittance per pixel, with a reflection type hologram color filter located on the back side of the modulator. The reflection type of direct-view color display device includes a hologram color filter which has an array of light-collecting holograms. Each of the light-collecting holograms has its own hologram color filter, reflection type hologram, and transmission type spatial light modulator located between the hologram color filter and the reflection type hologram.Type: GrantFiled: May 15, 2001Date of Patent: December 23, 2003Assignee: Dai Nippon Printing Co., Ltd.Inventors: Shingo Nishikawa, Kenji Ueda, Toshikazu Segawa, Tsuyoshi Hotta, Yuko Kuwabara, Masachika Watanabe
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Patent number: 6473144Abstract: A liquid crystal display apparatus and liquid crystal projection display apparatus, which employ a hologram color filter, and which are designed so that the illuminating light utilization efficiency is improved to a considerable extent, and that a color image can be faithfully displayed with excellent color reproducibility without uneven color or other similar problem. A color liquid crystal display apparatus (11) has a hologram (5), which diffractively disperses incident light so as to emanate light rays in different wavelength regions at a predetermined spatial period, as a color filter, and a liquid crystal display device (6). The display apparatus (11) is illuminated by white parallel back light (3) from an illuminator (14). A displayed image which is modulated in the color liquid crystal display apparatus (11) is passed through a field lens, which is disposed in the vicinity of the display apparatus (11), and formed as an enlarged image on a screen (19) for display through a projection lens (18).Type: GrantFiled: November 5, 1997Date of Patent: October 29, 2002Assignee: Dai Nippon Printing Co., Ltd.Inventors: Nobuhiko Ichikawa, Tsuyoshi Hotta
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Patent number: 6426812Abstract: The present invention provides a hologram color filter having a drastically decreased dependence of diffraction efficiency on wavelength and well corrected for a color balance among the three colors R, G and B comprising an array of converging element holograms 5′, each of which enables white light incident at a given angle &thgr; with respect to a normal line of a hologram recorded surface thereof to be spectroscopically separated by wavelength dispersion in a direction substantially along the hologram recorded surface, wherein the converging element holograms 5′ have each a plurality of hologram pieces 51 and 52 superposed on each other or multi-recorded therein, which, with respect to the white light 3 incident at the given angle &thgr;, have substantially identical spatial wavelength distributions of wavelength dispersion and different peak wavelengths of diffraction efficiency.Type: GrantFiled: September 14, 1998Date of Patent: July 30, 2002Assignee: Dai Nippon Printing Co., Ltd.Inventors: Nobuhiko Ichikawa, Tsuyoshi Hotta, Kenji Ueda
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Patent number: 6366371Abstract: A transmission hologram allowing an illuminating light source for holographic reconstruction to be placed behind the hologram, i.e. on the side opposite to the viewing side, and permitting reconstruction of an image that is bright and clear and has low chromatic dispersion, which is the feature of the reflection type volume hologram. A transmissively viewable reflection hologram has a semitransparent reflecting mirror or a semitransparent reflecting layer placed at either side of a reflection type volume hologram member. The semitransparent reflecting mirror or the semitransparent reflecting layer is integral with or separate from the reflection type volume hologram member.Type: GrantFiled: March 24, 2000Date of Patent: April 2, 2002Assignee: Dai Nippon Printing Co., Ltd.Inventors: Daijiro Kodama, Tsuyoshi Hotta
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Patent number: 6340540Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: GrantFiled: June 29, 2000Date of Patent: January 22, 2002Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Publication number: 20020001107Abstract: The present invention provides a hologram color filter having a drastically decreased dependence of diffraction efficiency on wavelength and well corrected for a color balance among the three colors R, G and B comprising an array of converging element holograms 5′, each of which enables white light incident at a given angle &thgr; with respect to a normal line of a hologram recorded surface thereof to be spectroscopically separated by wavelength dispersion in a direction substantially along the hologram recorded surface, wherein the converging element holograms 5′ have each a plurality of hologram pieces 51 and 52 superposed on each other or multi-recorded therein, which, with respect to the white light 3 incident at the given angle &thgr;, have substantially identical spatial wavelength distributions of wavelength dispersion and different peak wavelengths of diffraction efficiency.Type: ApplicationFiled: September 14, 1998Publication date: January 3, 2002Inventors: NOBUHIKO ICHIKAWA, TSUYOSHI HOTTA, KENJI UEDA
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Publication number: 20010053004Abstract: The invention provides a diffusing plate with the angle of diffusion controllable within a desired range by use of a hologram, which is capable of presenting bright displays so that it is applicable to, for instance, a backlighting diffusing plate for liquid crystal display device. A diffusing plate 2 having an angle of diffusion &thgr; is brought into close contact with a hologram photosensitive material 1. Then, parallel light 3 is obliquely at an angle of incidence &agr; on the photosensitive material 1 while parallel light 4 is vertically incident on the diffusing plate 2. Thereupon, parallel light 4 is converted into diffused light 5 having an angle of diffraction &thgr; upon passing through the diffusing plate 2. Diffused light 5 interferes with obliquely incident parallel light 3 from the opposite direction in photosensitive material 1 to produce interference fringes, thereby forming a reflection type hologram.Type: ApplicationFiled: May 15, 2001Publication date: December 20, 2001Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Shingo Nishikawa, Kenji Ueda, Toshikazu Segawa, Tsuyoshi Hotta, Yuko Kuwabara, Masachika Watanabe
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Patent number: 6127066Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.Type: GrantFiled: July 18, 1997Date of Patent: October 3, 2000Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
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Patent number: 6033810Abstract: A holographic optical element or other similar molded article using glass as a substrate is improved in the adhesion between the glass substrate and a resin layer formed thereon so that neither peeling nor change of properties will occur. A holographic optical element (4) is adapted to generate interference fringes of the same pitch as that of tracks formed on a magnetic recording disk or repeated patterns formed on an encoder by interference between two light beams emerging from two different holographic lens regions. The holographic optical element (4) includes a glass substrate (3), a radiation-cured resin layer (2) having a hologram relief pattern on the surface thereof, and a silane coupling agent layer (5) provided between the glass substrate (3) and the radiation-cured resin layer (2).Type: GrantFiled: May 21, 1997Date of Patent: March 7, 2000Assignee: Dai Nippon Printing Co., Ltd.Inventors: Yukio Taniguchi, Tsuyoshi Hotta, Yuko Kuwabara, Hideaki Morita, Toshikazu Segawa