Patents by Inventor Keitaro SUGIHARA

Keitaro SUGIHARA 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: 11977938
    Abstract: A forming mold has a surface in contact with a deposited film, a part or an entire part being a first wavy surface. A wave period of the first wavy surface is in a range of 250 nm or more and 500 nm or less. The deposited film conforms to the surface of the forming mold. The first wavy surface includes a plurality of rib surfaces, a plurality of groove surfaces, and a plurality of taper surfaces connecting the rib surfaces to the respective groove surfaces. The deposited film has a peak zone, a valley zone, and a transition zone. One of the peak zone, the valley zone, and the transition zone and another one of the peak zone, the valley zone, and the transition zone are different or has portions different in thickness and/or volume density.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: May 7, 2024
    Assignee: TOPPAN INC.
    Inventors: Keitaro Sugihara, Akihito Kagotani
  • Patent number: 11774650
    Abstract: A display body includes a display surface including a plurality of display region groups. Each display region includes at least one reflection surface that is configured to reflect light incident on the display surface toward an area including a corresponding one of reflection directions that are associated with the respective display region groups. Each display region group is configured to form an image unique to the display region group in a corresponding one of the reflection directions through reflection of light on the reflection surfaces in the display region group. The display region groups are configured to form, in two adjacent ones of the reflection directions, different images that have a interrelation between each other.
    Type: Grant
    Filed: June 9, 2022
    Date of Patent: October 3, 2023
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Tomoko Tashiro, Keitaro Sugihara, Toshiki Toda
  • Publication number: 20230031501
    Abstract: A color display of an embodiment includes: an embossed layer; a high refractive index layer; and a protective layer, laminated in this order, wherein the high refractive index layer has a highest refractive index among these layers, the embossed layer includes a first region having a periodic structure with a period at least smaller than a center wavelength of visible light, a plurality of the first regions, each having a strip shape, are connected to each other at their longitudinal end sides, the first regions being offset from each other in a direction perpendicular to a longitudinal direction of the strip shape, as viewed via a display surface, and a periodic direction of the periodic structure is parallel to the longitudinal direction.
    Type: Application
    Filed: October 7, 2022
    Publication date: February 2, 2023
    Applicant: TOPPAN INC.
    Inventor: Keitaro SUGIHARA
  • Patent number: 11555952
    Abstract: A display having high resistance to counterfeiting including a micro concavo-convex structure layer on a predetermined reference surface, the micro concavo-convex structure layer having a plurality of microstructures arranged on the reference surface. Each of the microstructures is formed of a prism structure made of a material that transmits light with a triangular cross-section having a first surface inclined relative to the reference surface in side view, and a second surface having an inclination angle relative to the reference surface such that the inclination angle is larger than an inclination angle of the first surface relative to the reference surface. A color layer as an example of a functional layer is provided on the second surface of all or some of the plurality of microstructures.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: January 17, 2023
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Keitaro Sugihara, Hanako Yamamoto, Tomoko Tashiro, Kazuhiro Yashiki
  • Patent number: 11511558
    Abstract: A subwavelength grating displaying a colored image exhibiting a color corresponding to a grating period of a subwavelength grating in reflection directions including a specular reflection direction. A relief surface displaying a reflection image in monochromatic reflected light in reflection directions including a direction different from the specular reflection direction. An optical element has a first state in which neither a colored image nor a reflection image is displayed, a second state in which the colored image is mainly displayed, and a third state in which the reflection image is mainly displayed. A plane in which the optical element is disposed and a plane including a line of sight of an observer form an observation angle therebetween. The optical element is observed in any of the first, second and third states according to the observation angle.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: November 29, 2022
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Hanako Yamamoto, Keitaro Sugihara, Tomoko Tashiro, Akihito Kagotani
  • Publication number: 20220299684
    Abstract: A display body includes a display surface including a plurality of display region groups. Each display region includes at least one reflection surface that is configured to reflect light incident on the display surface toward an area including a corresponding one of reflection directions that are associated with the respective display region groups. Each display region group is configured to form an image unique to the display region group in a corresponding one of the reflection directions through reflection of light on the reflection surfaces in the display region group. The display region groups are configured to form, in two adjacent ones of the reflection directions, different images that have a interrelation between each other.
    Type: Application
    Filed: June 9, 2022
    Publication date: September 22, 2022
    Inventors: Tomoko TASHIRO, Keitaro SUGIHARA, Toshiki TODA
  • Publication number: 20220215215
    Abstract: A forming mold has a surface in contact with a deposited film, a part or an entire part being a first wavy surface. A wave period of the first wavy surface is in a range of 250 nm or more and 500 nm or less. The deposited film conforms to the surface of the forming mold. The first wavy surface includes a plurality of rib surfaces, a plurality of groove surfaces, and a plurality of taper surfaces connecting the rib surfaces to the respective groove surfaces. The deposited film has a peak zone, a valley zone, and a transition zone. One of the peak zone, the valley zone, and the transition zone and another one of the peak zone, the valley zone, and the transition zone are different or has portions different in thickness and/or volume density.
    Type: Application
    Filed: March 21, 2022
    Publication date: July 7, 2022
    Applicant: TOPPAN INC.
    Inventors: Keitaro SUGIHARA, Akihito KAGOTANI
  • Patent number: 11372141
    Abstract: A display body includes a display surface including a plurality of display region groups. Each display region includes at least one reflection surface that is configured to reflect light incident on the display surface toward an area including a corresponding one of reflection directions that are associated with the respective display region groups. Each display region group is configured to form an image unique to the display region group in a corresponding one of the reflection directions through reflection of light on the reflection surfaces in the display region group. The display region groups are configured to form, in two adjacent ones of the reflection directions, different images that have a interrelation between each other.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: June 28, 2022
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Tomoko Tashiro, Keitaro Sugihara, Toshiki Toda
  • Patent number: 11300809
    Abstract: An optical structure surface including a plurality of display region groups including a first display region group and a second display region group. In each display region group, an azimuth angle is formed between a projection direction and a reference direction, and a plurality of reflective surfaces belonging to the display region produce an image. A plurality of display regions include a set of display regions whose azimuth angles are different from each other, and the plurality of display regions display an image unique to the display region group in a display direction by a plurality of reflective surfaces of each of the display regions. The display directions of the first display region group and the second display group are different to provide a different brightness to their respective images, in the respective display directions of the images.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 12, 2022
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventor: Keitaro Sugihara
  • Patent number: 11059317
    Abstract: A display includes a plurality of pixels arranged in matrix. Each of the pixels includes a single reflecting surface, and all the reflecting surfaces include a set of the reflecting surfaces that allow light incident in a predetermined direction to be reflected in a direction predefined for the respective reflecting surfaces, so that light reflected by all the reflecting surfaces forms an image which appears in a specific direction, which is a direction common to all the reflecting surfaces.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: July 13, 2021
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Tomoko Tashiro, Toshiki Toda, Keitaro Sugihara
  • Publication number: 20210001659
    Abstract: A subwavelength grating displaying a colored image exhibiting a color corresponding to a grating period of a subwavelength grating in reflection directions including a specular reflection direction. A relief surface displaying a reflection image in monochromatic reflected light in reflection directions including a direction different from the specular reflection direction. An optical element has a first state in which neither a colored image nor a reflection image is displayed, a second state in which the colored image is mainly displayed, and a third state in which the reflection image is mainly displayed. A plane in which the optical element is disposed and a plane including a line of sight of an observer form an observation angle therebetween. The optical element is observed in any of the first, second and third states according to the observation angle.
    Type: Application
    Filed: September 15, 2020
    Publication date: January 7, 2021
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Hanako YAMAMOTO, Keitaro SUGIHARA, Tomoko TASHIRO, Akihito KAGOTANI
  • Publication number: 20200408972
    Abstract: An optical element including a grating structure, and the grating structure including a first grating structure and a second grating structure. A concavo-convex surface includes a first region in which the first grating structure is located, and a second region in which the second grating structure is located and which is located close to the first region in plan view, as viewed perpendicular to the first surface. An azimuth angle of the first grating structure and an azimuth angle of the second grating structure are equal to each other. The first grating structure and the second grating structure have a grating period in a range of 250 nm or more and 500 nm or less, and a difference between the grating period of the first grating structure and the grating period of the second grating structure is 20 nm or more.
    Type: Application
    Filed: September 15, 2020
    Publication date: December 31, 2020
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Tomoko TASHIRO, Keitaro SUGIHARA, Hanako YAMAMOTO
  • Patent number: 10792947
    Abstract: In an optical structure for displaying a stereoscopic frame image on a structure formation surface, a frame motif that displays a frame image in which reflection moves is formed on a structure formation surface, the frame motif is made up of a plurality of perforated reflecting segments, each including one or more first reflecting mirrors having a reflective layer uniformly tilted relative to the structure formation surface, the tilt angle of the first reflecting mirror is different between adjacent perforated reflecting segments so as to gradually change over a plurality of adjacent perforated reflecting segments, and at least one of the plurality of perforated reflecting segments surrounds an opening provided with no first reflecting mirror.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: October 6, 2020
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Tomoko Tashiro, Toshiki Toda, Keitaro Sugihara
  • Publication number: 20200301052
    Abstract: A display having high resistance to counterfeiting including a micro concavo-convex structure layer on a predetermined reference surface, the micro concavo-convex structure layer having a plurality of microstructures arranged on the reference surface. Each of the microstructures is formed of a prism structure made of a material that transmits light with a triangular cross-section having a first surface inclined relative to the reference surface in side view, and a second surface having an inclination angle relative to the reference surface such that the inclination angle is larger than an inclination angle of the first surface relative to the reference surface. A color layer as an example of a functional layer is provided on the second surface of all or some of the plurality of microstructures.
    Type: Application
    Filed: June 2, 2020
    Publication date: September 24, 2020
    Applicant: TOPPAN PRINTING CO.,LTD.
    Inventors: Keitaro SUGIHARA, Hanako YAMAMOTO, Tomoko TASHIRO, Kazuhiro YASHIKI
  • Publication number: 20200086674
    Abstract: In an optical structure for displaying a stereoscopic frame image on a structure formation surface, a frame motif that displays a frame image in which reflection moves is formed on a structure formation surface, the frame motif is made up of a plurality of perforated reflecting segments, each including one or more first reflecting mirrors having a reflective layer uniformly tilted relative to the structure formation surface, the tilt angle of the first reflecting mirror is different between adjacent perforated reflecting segments so as to gradually change over a plurality of adjacent perforated reflecting segments, and at least one of the plurality of perforated reflecting segments surrounds an opening provided with no first reflecting mirror.
    Type: Application
    Filed: November 19, 2019
    Publication date: March 19, 2020
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Tomoko TASHIRO, Toshiki TODA, Keitaro SUGIHARA
  • Publication number: 20200026092
    Abstract: An optical structure surface including a plurality of display region groups including a first display region group and a second display region group. In each display region group, an azimuth angle is formed between a projection direction and a reference direction, and a plurality of reflective surfaces belonging to the display region produce an image. A plurality of display regions include a set of display regions whose azimuth angles are different from each other, and the plurality of display regions display an image unique to the display region group in a display direction by a plurality of reflective surfaces of each of the display regions. The display directions of the first display region group and the second display group are different to provide a different brightness to their respective images, in the respective display directions of the images.
    Type: Application
    Filed: September 27, 2019
    Publication date: January 23, 2020
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventor: Keitaro SUGIHARA
  • Patent number: 10471757
    Abstract: There is provided a versatile optical element applicable both to an electrode layer required in a bank bill field and to an optical element required in an ID field. In an optical element (1) according to one embodiment of the present invention, a first layer (2) is arranged on a second layer (3) having a relief structure on a surface thereof, and a first region (4) and a second region (5) are provided.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: November 12, 2019
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Kazuhiro Yashiki, Akira Nagano, Keitaro Sugihara, Tomoko Tashiro
  • Publication number: 20190171028
    Abstract: Display regions each include a plurality of reflection surfaces. The reflection surfaces are arranged at an average pitch of 1 ?m and 300 ?m inclusive in a direction in which the reflection surfaces are arranged. The display regions of each display region group include display regions that differ from one another in the normal direction of the reflection surfaces. Each display region group is configured to form, in the associated observation direction, an image that is unique to the display region group and composed of the image elements formed by the display regions of the display region group.
    Type: Application
    Filed: January 29, 2019
    Publication date: June 6, 2019
    Inventor: Keitaro SUGIHARA
  • Publication number: 20190170917
    Abstract: A display body includes a display surface including a plurality of display region groups. Each display region includes at least one reflection surface that is configured to reflect light incident on the display surface toward an area including a corresponding one of reflection directions that are associated with the respective display region groups. Each display region group is configured to form an image unique to the display region group in a corresponding one of the reflection directions through reflection of light on the reflection surfaces in the display region group. The display region groups are configured to form, in two adjacent ones of the reflection directions, different images that have a interrelation between each other.
    Type: Application
    Filed: January 23, 2019
    Publication date: June 6, 2019
    Inventors: Tomoko Tashiro, Keitaro Sugihara, Toshiki Toda
  • Publication number: 20190105939
    Abstract: A display includes a plurality of pixels arranged in matrix. Each of the pixels includes a single reflecting surface, and all the reflecting surfaces include a set of the reflecting surfaces that allow light incident in a predetermined direction to be reflected in a direction predefined for the respective reflecting surfaces, so that light reflected by all the reflecting surfaces forms an image which appears in a specific direction, which is a direction common to all the reflecting surfaces.
    Type: Application
    Filed: December 6, 2018
    Publication date: April 11, 2019
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Tomoko TASHIRO, Toshiki TODA, Keitaro SUGIHARA