Patents by Inventor Shigenobu Sakai
Shigenobu Sakai 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: 20240081745Abstract: A driver support system includes a processor that acquires a heart rate of a target person; evaluates a health condition of the target person based on the heart rate of the target person; and performs an operation setting of a moving object into which the target person gets as a driver. The processor evaluates the health condition of the target person based on an ordinary heart rate, which is a heart rate of the target person during an ordinary period, and a pre-driving heart rate which is a heart rate of the target person when the target person arrives at the moving object, performs the operation setting of the moving object based on a result of the health condition of the target person evaluated when the target person gets into the moving object as a driver.Type: ApplicationFiled: September 1, 2023Publication date: March 14, 2024Inventors: Hideki Sakai, Shigenobu Mitsuzawa, Satoru Shinkawa, Tomohiro Imai, Keisuke Nakamura, Hiroshi Ono
-
Publication number: 20240081661Abstract: Provided is a health evaluation system that includes: an acquisition unit that acquires a blood pressure value of a target person; and an evaluation unit that evaluates a health condition of the target person based on the acquired blood pressure value. The evaluation unit evaluates the health condition of the target person based on: a standing-state blood pressure value that is a blood pressure value measured when the target person is heading toward a moving body in a standing state; and a seated-state blood pressure value that is a blood pressure value of the target person measured after boarding the moving body and seated on a seat.Type: ApplicationFiled: September 1, 2023Publication date: March 14, 2024Inventors: Hideki Sakai, Shigenobu Mitsuzawa, Satoru Shinkawa, Tomohiro Imai, Keisuke Nakamura, Hiroshi Ono
-
Publication number: 20240081749Abstract: A health assessment system includes a processor that acquires biometric measurement data measured by a wearable terminal worn by a target person, the biometric measurement data being biometric data of the target person; generates complementary biometric data for complementing the biometric measurement data in a missing period in which the acquisition unit is not able to acquire the biometric measurement data from the wearable terminal; and assesses a health condition of the target person based on the biometric measurement data and the complementary biometric data, the processor acquires exercise information, which is information about exercise of the target person, from a mobile terminal carried by the target person, generates the complementary biometric data in the missing period, based on the exercise information of the target person which is obtained from the mobile terminal.Type: ApplicationFiled: September 1, 2023Publication date: March 14, 2024Inventors: Keisuke Nakamura, Satoru Shinkawa, Tomohiro Imai, Shigenobu Mitsuzawa, Hideki Sakai, Hiroshi Ono, Masahiro Kimura
-
Publication number: 20240083245Abstract: A driver support system includes: an acquisition unit that acquires biometric data of a driver of a moving object; an evaluation unit that evaluates a health condition of the driver; and an interactive response unit that executes an interaction operation for interactive response with the driver using an HMI device mounted on the moving object, the evaluation unit being configured to; when estimating based on the biometric data for the driver that the health condition of the driver is poor, instruct the interactive response unit to execute the interaction operation, thereby acquiring a response input, which is a response of the driver to a response facilitating output that facilitates the driver to respond in the interaction operation; and determine the health condition of the driver based on a degree of suitability of the response input to the response facilitating output.Type: ApplicationFiled: September 1, 2023Publication date: March 14, 2024Inventors: Keisuke Nakamura, Satoru Shinkawa, Tomohiro Imai, Shigenobu Mitsuzawa, Hideki Sakai, Hiroshi Ono, Masahiro Kimura
-
Publication number: 20240085198Abstract: A navigation system includes an evaluation unit for evaluating a degree of a health state quality for a driver of a moving body, and a route guidance unit for searching a route from a current position of the moving body to a destination, and for performing guidance of the searched route, the route guidance unit determines a search condition of a route to the destination based on an evaluation result of a health state of the driver in the evaluation unit.Type: ApplicationFiled: August 30, 2023Publication date: March 14, 2024Inventors: Tomohiro Imai, Shigenobu Mitsuzawa, Keisuke Nakamura, Satoru Shinkawa, Hideki Sakai, Hiroshi Ono
-
Patent number: 7336244Abstract: An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the transparent material layer and the variable refractive index material, and a driving device supplying a voltage including driving frequencies f1 and f2 between the transparent electrodes. The difference ?? in the dielectric constant of the variable refractive index material due to the anisotropy is positive at one of the driving frequencies and negative at the other driving frequency.Type: GrantFiled: February 23, 2004Date of Patent: February 26, 2008Assignee: Nippon Telegraph and Telephone CorporationInventors: Shiro Suyama, Munekazu Date, Shigeto Kohda, Kinya Kato, Shigenobu Sakai
-
Patent number: 7209097Abstract: An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the transparent material layer and the variable refractive index material, and a driving device supplying a voltage including driving frequencies f1 and f2 between the transparent electrodes. The difference ?? in the dielectric constant of the variable refractive index material due to the anisotropy is positive at one of the driving frequencies and negative at the other driving frequency.Type: GrantFiled: February 23, 2004Date of Patent: April 24, 2007Assignee: Nippon Telegraph and Telephone CorporationInventors: Shiro Suyama, Munekazu Date, Shigeto Kohda, Kinya Kato, Shigenobu Sakai
-
Publication number: 20040164927Abstract: An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy and having a property in which a sign of a difference &Dgr;&egr; in dielectric constant due to the anisotropy is reversed at driving frequencies f1 and f2, at least two transparent electrodes arranged to sandwich the transparent material layer and the layer including the variable refractive index material, and a driving device supplying a voltage including the driving frequencies f1 and f2 between the transparent electrodes.Type: ApplicationFiled: February 23, 2004Publication date: August 26, 2004Applicant: Nippon Telegraph And Telephone CorporationInventors: Shiro Suyama, Munekazu Date, Shigeto Kohda, Kinya Kato, Shigenobu Sakai
-
Publication number: 20040160389Abstract: An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the transparent material layer and the variable refractive index material, and a driving device supplying a voltage including driving frequencies f1 and f2 between the transparent electrodes. The difference &Dgr;&egr; in the dielectric constant of the variable refractive index material due to the anisotropy is positive at one of the driving frequencies and negative at the other driving frequency.Type: ApplicationFiled: February 23, 2004Publication date: August 19, 2004Applicant: Nippon Telegraph And Telephone CorporationInventors: Shiro Suyama, Munekazu Date, Shigeto Kohda, Kinya Kato, Shigenobu Sakai
-
Patent number: 6714174Abstract: An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the transparent material layer and the variable refractive index material, and a driving device supplying a voltage including driving frequencies f1 and f2 between the transparent electrodes. The difference &Dgr;∈ in the dielectric constant of the variable refractive index material due to the anisotropy is positive at one of the driving frequencies and negative at the other driving frequency.Type: GrantFiled: December 11, 2001Date of Patent: March 30, 2004Assignee: Nippon Telegraph and Telephone CorporationInventors: Shiro Suyama, Munekazu Date, Shigeto Kohda, Kinya Kato, Shigenobu Sakai
-
Patent number: 6469683Abstract: An optical device includes a transparent layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the transparent material layer and the variable refractive index material, and a driving device supplying a voltage including driving frequencies f1 and f2 between the transparent electrodes. The difference &Dgr;∈ in the dielectric constant of the variable refractive index material due to the anisotropy is positive at one of the driving frequencies and negative at the driving frequency.Type: GrantFiled: January 16, 1997Date of Patent: October 22, 2002Assignee: Nippon Telegraph and Telephone CorporationInventors: Shiro Suyama, Munekazu Date, Shigeto Kohda, Kinya Kato, Shigenobu Sakai
-
Publication number: 20020047837Abstract: An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy and having a property in which a sign of a difference &Dgr;&egr; in dielectric constant due to the anisotropy is reversed at driving frequencies f1 and f2, at least two transparent electrodes arranged to sandwich the transparent material layer and the layer including the variable refractive index material, and a driving device supplying a voltage including the driving frequencies f1 and f2 between the transparent electrodes.Type: ApplicationFiled: December 11, 2001Publication date: April 25, 2002Applicant: Nippon Telegraph and Telephone CorporationInventors: Shiro Suyama, Munekazu Date, Shigeto Kohda, Kinya Kato, Shigenobu Sakai
-
Patent number: 5751452Abstract: A polymer dispersed liquid crystal optical device is presented which has optical elements which control reflection, transmission and diffraction of incident light entering the device by adjusting the magnitude of the electrical field applied to the device between a maximum and a minimum limits. An optical element consists of a polymer material having an electrical field-independent refractive index, and a liquid crystal material having an electrical field-dependent refractive index. The optical elements are distributed through the device at specific inter-element spacings, thus enabling to generate reflection of incident light in accordance with Bragg's law of reflection. The inter-element spacings can also be varied by the application of the field, thus enabling to generate reflection of light of a desired wavelength. Such optical elements are ideal for use in full color optical display apparatus of a matrix driven type.Type: GrantFiled: February 18, 1994Date of Patent: May 12, 1998Assignee: Nippon Telegraph and Telephone CorporationInventors: Keiji Tanaka, Kinya Kato, Shinji Tsuru, Shigenobu Sakai
-
Patent number: 5748272Abstract: A polymer dispersed liquid crystal optical device is presented which has optical elements which control reflection, transmission and diffraction of incident light entering the device by adjusting the magnitude of the electrical field applied to the device between a maximum and a minimum limits. An optical element consists of a polymer material having an electrical field-independent refractive index, and a liquid crystal material having an electrical field-dependent refractive index. The optical elements are distributed through the device at specific inter-element spacings, thus enabling to generate reflection of incident light in accordance with Bragg's law of reflection. The inter-element spacings can also be varied by the application of the field, thus enabling to generate reflection of light of a desired wavelength. Such optical elements are ideal for use in full color optical display apparatus of a matrix driven type.Type: GrantFiled: June 10, 1996Date of Patent: May 5, 1998Assignee: Nippon Telegraph and Telephone CorporationInventors: Keiji Tanaka, Kinya Kato, Shinji Tsuru, Shigenobu Sakai
-
Patent number: 5532736Abstract: A videocamera is disposed diagonally to the front of a display and the image of a subject is reflected toward the videocamera by a half-transparent mirror placed in front of the screen of the display. The half-transparent mirror has in its front inclined strip-like micro reflective surfaces and inclined strip-like micro transparent surfaces which emit therethrough incident light from the display screen. The angle between each micro transparent surface and a strip-like micro area formed on the back of the half-transparent mirror in opposing relation to the micro transparent surface is determined so that the half-transparent mirror has a light collecting or condensing effect.Type: GrantFiled: March 9, 1995Date of Patent: July 2, 1996Assignee: Nippon Telegraph and Telephone CorporationInventors: Makoto Kuriki, Kazutake Uehira, Yukio Takahashi, Shigenobu Sakai
-
Patent number: 5317405Abstract: In a display and image capture apparatus for a videophone or video teleconferencing system a half-transparent mirror array is disposed adjacent the display surface of a display and an image reflected by the half-transparent mirror array is captured by a video camera. The half-transparent mirror array is formed by a plurality of micro HMs arranged in the same plane at a predetermined inclination angle and reflects incident light from a subject toward the video camera.Type: GrantFiled: February 25, 1992Date of Patent: May 31, 1994Assignee: Nippon Telegraph and Telephone CorporationInventors: Makoto Kuriki, Hitoshi Arai, Shigenobu Sakai, Masato Nakamura, Hideki Nakajima, Shirou Suyama, Kazutake Uehira, Noboru Hagiwara
-
Patent number: 5300966Abstract: An original image is divided into a plurality of image parts in the forms of image signals which are then given to liquid crystal light valves, respectively so that liquid crystal light valves display the plurality of image parts therein. These liquid crystal light valves allow light from light sources to pass through so as to form image light beams which are intensity-modulated in accordance with the divided image parts. A plurality of mirrors reflect the image light beams and introduce them onto a projecting lens system. In this arrangement, the plurality of mirrors are located in such a way that their reflecting surfaces do not cross the optical axis of the projecting lens system, and the image light beams are synthesized on the screen so as to reproduce an original image. Accordingly, the pixel density of the original image can be multiplied by a multiplier which equal to the number of used liquid crystal light valves.Type: GrantFiled: May 21, 1992Date of Patent: April 5, 1994Assignee: Nippon Telegraph and Telephone CorporationInventors: Kazutake Uehira, Noboru Hagiwara, Kiyoshi Masuda, Tomoyoshi Nomura, Shigenobu Sakai
-
Patent number: 5012228Abstract: An active matrix type display device is disclosed having an m number of unit pixel array blocks repetitively arranged in a row direction. Each pixel array block comprises a k rows.times.n columns matrix of display elements (Cij, i=1, 2, . . . n, j=1, 2, . . . n) and scanning lines G1 . . . Gn and data signal lines D1 . . . Dn are arranged in an intersecting fashion with first and second switching elements of each display element connected to the corresponding lines in a manner to provide different data input routes.Type: GrantFiled: July 10, 1990Date of Patent: April 30, 1991Assignee: Nippon Telegraph and TelephoneInventors: Kiyoshi Masuda, Shigeto Kohda, Shigenobu Sakai, Kazuo Kimura, Tomoyoshi Nomura