Patents by Inventor Shoichi Uchiyama

Shoichi Uchiyama 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: 6947025
    Abstract: A lighting apparatus used for a projection type display is provided, which can change the incident ray volume to an optical modulation device without changing the optical output intensity of the lamp, and can exhibit excellent effects in expressive power of an image and adaptability to the use environment. The lighting apparatus of the present invention comprises; a light source, two fly-eye lenses constituting a uniform lighting device, and a shading plate arranged between these fly-eye lenses and constituting a dimming device for adjusting the amount of light of the outgoing light from the light source. The angle of inclination of the shading plate is controlled based on an image signal supplied to the optical modulation device, thereby enabling adjustment of the amount of light.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: September 20, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Hidehito Iisaka, Shoichi Uchiyama
  • Publication number: 20050195223
    Abstract: Exemplary embodiments of the invention to provide a light modulating apparatus suitable to expand the brightness dynamic range and number of levels of gray of display images to enhance image quality by modulating light from a light source in two stages via a first light modulator device and a second light modulator device, and displaying images according to the resolution of the second light modulator device higher than the resolution of the first light modulator device.
    Type: Application
    Filed: March 2, 2005
    Publication date: September 8, 2005
    Applicant: Seiko Epson Corporation
    Inventors: Takashi Nitta, Junichi Nakamura, Shoichi Uchiyama, Tsunemori Asahi
  • Publication number: 20050190256
    Abstract: Exemplary embodiments of the invention provide a light propagation characteristic control apparatus which realizes to extend the light-intensity dynamic range and the number of levels, and is suited for enhancing image quality and reducing the size and generation time of tables. A projection display apparatus tentatively decides a transmissivity T2 of each pixel of a color-modulation light valve, decides a transmissivity T1 of each pixel of an light intensity-modulation light valve depending upon a tentatively decided transmissivity T2 and HDR display data and decides a control value of each pixel of an light intensity-modulation light valve depending upon a decided transmissivity T1. Then, depending upon a decided transmissivity T1 and HDR display data, a transmissivity T2 is decided of each pixel of the color modulation light valve. Depending upon a decided transmissivity T2, decided is a control value of each pixel of the color modulation light valve.
    Type: Application
    Filed: December 15, 2004
    Publication date: September 1, 2005
    Applicant: Seiko Epson Corporation
    Inventors: Takashi Nitta, Junichi Nakamura, Shoichi Uchiyama, Tsunemori Asahi
  • Publication number: 20050190140
    Abstract: In a projection-type display device 1, a display control device 2 that controls a first DMD 50 and a second DMD 70 is composed by comprising an interface circuit 2a, a mirror device drive circuit 2b for controlling the driving of the micromirrors of second DMD 50, a mirror device drive circuit 2c for controlling the driving of the micromirrors of second DMD 70, a CPU 2d that controls computations and the entire system based on a control program, a ROM 2e that contains the control program of CPU 2d and so forth in a predefined area, and a RAM 2f for containing data read from ROM 2e and so forth and computation results required for the computation process of CPU 2d.
    Type: Application
    Filed: February 25, 2005
    Publication date: September 1, 2005
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tsunemori Asahi, Junichi Nakamura, Shoichi Uchiyama, Takashi Nitta
  • Publication number: 20050185249
    Abstract: A projection type display device includes dichroic mirrors which separate the light from the light source into light of the three primary colors R, G and B, a plurality of color modulation light valves upon which the light beams separated by the dichroic mirrors are respectively incident and comprising a plurality of picture elements which are capable of being individually controlled with regard to their transmittivity ratios, a dichroic prism which combines the light beams from the color modulation light valves, a relay lens which forms the optical images of the color modulation light valves upon the picture element surface of a reflective type liquid crystal light valve, and a reflective type liquid crystal light valve upon which the light from the relay lens is incident and comprising a plurality of picture elements whose reflectivity ratios can be individually controlled.
    Type: Application
    Filed: February 8, 2005
    Publication date: August 25, 2005
    Applicant: SEIKO EPSON CORORATION
    Inventors: Shoichi Uchiyama, Junichi Nakamura, Takashi Nitta, Tsunemori Asahi
  • Publication number: 20050174495
    Abstract: A projection-type display device 1 including a light source 10, an optical integrator 20, dichroic mirrors 30 and 35, a reflecting mirror 36, a relay optical system 40, parallelizing lenses 50B, 50G and 50R, liquid crystal light valves 60B, 60G and 60R, incident side lenses 70B, 70G and 70R, a light-synthesizing cross dichroic prism 80, a relay lens 90, an emergent side lens 95, a liquid crystal light valve 100 and a projection lens 110, and liquid crystal light valve 100 is provided in the rear stage of liquid crystal light valves 60B, 60G and 60R.
    Type: Application
    Filed: December 17, 2004
    Publication date: August 11, 2005
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoshitaka Itoh, Shohei Yoshida, Shoichi Uchiyama, Junichi Nakamura, Takashi Nitta, Tsunemori Asahi
  • Publication number: 20050174052
    Abstract: A transmission type photocathode of the present invention comprises a light absorption layer 1 formed of diamond or a material containing diamond as a main component, a supporting frame 21 for reinforcing the mechanical strength of the light absorption layer 1, a first electrode 31 provided at the plane of incidence of the light absorption layer 1, and a second electrode 32 provided at the plane of emission of the light absorption layer 1. A voltage is applied between the plane of incidence and plane of emission of the light absorption layer 1 to form an electric field in the light absorption layer 1. When light to be detected is made incident and photoelectrons occur in the light absorption layer 1, the photoelectrons are accelerated to the plane of emission by the electric field formed in the light absorption layer 1, and emitted to the outside of the transmission type photocathode.
    Type: Application
    Filed: February 24, 2003
    Publication date: August 11, 2005
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Minoru Niigaki, Shoichi Uchiyama, Hirofumi Kan
  • Publication number: 20050157366
    Abstract: Exemplary embodiments of the present invention provide a light propagation characteristic control apparatus which extends the light-intensity dynamic range and the number of levels, and are suited for enhancing image quality and reducing the size and generation time of tables. Exemplary embodiments provide a projection display apparatus that tentatively decides a transmissivity T2 of each pixel of a color-modulation light valve depending upon HDR display data, and decides a transmissivity T1 of each pixel of an intensity-modulation light valve depending upon a tentatively decided transmissivity T2 and the HDR display data, and a control value of each pixel of the intensity-modulation light valve depending upon a decided transmissivity T1. Depending upon a decided transmissivity T1 and the HDR display data, transmissivity T2 is decided of each pixel of the color-modulation light valve. Depending upon a decided transmissivity T2, a control value is decided of each pixel of the color-modulation light valve.
    Type: Application
    Filed: December 17, 2004
    Publication date: July 21, 2005
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tsunemori Asahi, Junichi Nakamura, Shoichi Uchiyama, Takashi Nitta
  • Publication number: 20050104527
    Abstract: The transmission secondary electron emitter according to the present invention comprises a secondary electron emitting layer 1 made of diamond or a material containing diamond as a main component, a supporting frame 21 reinforcing the mechanical strength of the secondary electron emitting layer 1, a first electrode 31 formed on the surface of incidence of the secondary electron emitting layer 1, and a second electrode 32 formed on the surface of emission of the secondary electron emitting layer 1. A voltage is applied between the surfaces of the incidence and the emission of the secondary electron emitting layer 1 to form an electric field in the secondary electron emitting layer 1.
    Type: Application
    Filed: February 24, 2003
    Publication date: May 19, 2005
    Inventors: Minoru Niigaki, Shoichi Uchiyama, Hirofumi Kan
  • Publication number: 20050045866
    Abstract: Ultraviolet light incident from the side of a surface layer 5 passes through the surface layer 5 to reach an optical absorption layer 4. Light which reaches the optical absorption layer 4 is absorbed within the optical absorption layer 4, and photoelectrons are generated within the optical absorption layer 4. Photoelectrons diffuse within the optical absorption layer 4, and reach the interface between the optical absorption layer 4 and the surface layer 5. Because the energy band is curved in the vicinity of the interface between the optical absorption layer 4 and surface layer 5, the energy of the photoelectrons is larger than the electron affinity in the surface layer 5, and so photoelectrons are easily ejected to the outside. Here, the optical absorption layer 4 is formed from an Al0.3Ga0.7N layer with an Mg content concentration of not less than 2×1019 cm?3 but not more than 1×1020 cm?3, so that a solar-blind type semiconductor photocathode 1 with high quantum efficiency is obtained.
    Type: Application
    Filed: October 12, 2004
    Publication date: March 3, 2005
    Inventors: Hirofumi Kan, Minoru Niigaki, Masashi Ohta, Yasufumi Takagi, Shoichi Uchiyama
  • Patent number: 6839178
    Abstract: The invention provides a method of producing a transmissive screen having a structure including light-absorption-material patterns that are formed on locations corresponding to locations of lens members, which are provided side by side on a light-transmissive substrate, and to locations of boundary portions between the corresponding lens members. In this method, lens compositions are discharged onto and are caused to land on the light transmissive substrate, and, by drops of the lens compositions, very small lens members or precursors thereof are formed. It is possible to provide a method of producing a transmissive screen, which makes it possible to realize, at a low cost, a bright transmissive screen which has high contrast ratio and which can display a high-quality image having reduced or no moiré and reduced or no speckles.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: January 4, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Shoichi Uchiyama, Satoru Miyashita, Hiroshi Kiguchi, Hironori Hasei
  • Patent number: 6831341
    Abstract: Ultraviolet light incident from the side of a surface layer 5 passes through the surface layer 5 to reach an optical absorption layer 4. Light which reaches the optical absorption layer 4 is absorbed within the optical absorption layer 4, and photoelectrons are generated within the optical absorption layer 4. Photoelectrons diffuse within the optical absorption layer 4, and reach the interface between the optical absorption layer 4 and the surface layer 5. Because the energy band is curved in the vicinity of the interface between the optical absorption layer 4 and surface layer 5, the energy of the photoelectrons is larger than the electron affinity in the surface layer 5, and so photoelectrons are easily ejected to the outside. Here, the optical absorption layer 4 is formed from an Al0.3Ga0.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: December 14, 2004
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Hirofumi Kan, Minoru Niigaki, Masashi Ohta, Yasufumi Takagi, Shoichi Uchiyama
  • Publication number: 20040129891
    Abstract: The present invention relates to an illuminant, etc., having a high response speed and a high luminous intensity. The illuminant comprises a substrate and a nitride semiconductor layer provided on one surface of the substrate. The nitride semiconductor layer emits fluorescence in response to incidence of electrons. At least part of the emitted fluorescence passes through the substrate, and then exits from the other surface of the substrate. Generation of the fluorescence is caused by incidence of electrons onto a quantum well structure of the nitride semiconductor layer and recombination of pairs of electrons and holes generated due to electron incidence, and the response speed of fluorescence generation is on the order of nanoseconds or less. Also, the luminous intensity of the fluorescence becomes equivalent to that of a conventional P47 fluorescent substance.
    Type: Application
    Filed: October 7, 2003
    Publication date: July 8, 2004
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Yasufumi Takagi, Minoru Niigaki, Shoichi Uchiyama, Minoru Kondo, Itaru Mizuno
  • Publication number: 20040021417
    Abstract: Ultraviolet light incident from the side of a surface layer 5 passes through the surface layer 5 to reach an optical absorption layer 4. Light which reaches the optical absorption layer 4 is absorbed within the optical absorption layer 4, and photoelectrons are generated within the optical absorption layer 4. Photoelectrons diffuse within the optical absorption layer 4, and reach the interface between the optical absorption layer 4 and the surface layer 5. Because the energy band is curved in the vicinity of the interface between the optical absorption layer 4 and surface layer 5, the energy of the photoelectrons is larger than the electron affinity in the surface layer 5, and so photoelectrons are easily ejected to the outside. Here, the optical absorption layer 4 is formed from an Al0.3Ga0.
    Type: Application
    Filed: May 14, 2003
    Publication date: February 5, 2004
    Inventors: Hirofumi Kan, Minoru Niigaki, Masashi Ohta, Yasufumi Takagi, Shoichi Uchiyama
  • Publication number: 20040012857
    Abstract: The invention provides a method of producing a transmissive screen having a structure including light-absorption-material patterns that are formed on locations corresponding to locations of lens members, which are provided side by side on a light-transmissive substrate, and to locations of boundary portions between the corresponding lens members. In this method, lens compositions are discharged onto and are caused to land on the light transmissive substrate, and, by drops of the lens compositions, very small lens members or precursors thereof are formed. It is possible to provide a method of producing a transmissive screen, which makes it possible to realize, at a low cost, a bright transmissive screen which has high contrast ratio and which can display a high-quality image having reduced or no moiré and reduced or no speckles.
    Type: Application
    Filed: July 16, 2003
    Publication date: January 22, 2004
    Applicant: Seiko Epson Corporation
    Inventors: Shoichi Uchiyama, Satoru Miyashita, Hiroshi Kiguchi, Hironori Hasei
  • Patent number: 6621637
    Abstract: A method of producing a transmissive screen having a structure including light-absorption-material patterns formed on locations corresponding to locations of lens members, which are provided side by side on a light-transmissive substrate, and to locations of boundary portions between the corresponding lens members. In the method, lens compositions are discharged onto and are caused to land on the light transmissive substrate, and, by drops of the lens compositions, very small lens members or precursors thereof are formed. It is possible to provide a method of producing a transmissive screen, which makes it possible to realize at a low cost a bright transmissive screen which has high contrast ratio and which can display a high-quality image having no moiré and no speckles.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: September 16, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Shoichi Uchiyama, Satoru Miyashita, Hiroshi Kiguchi, Hironori Hasei
  • Publication number: 20030086265
    Abstract: A lighting apparatus used for a projection type display is provided, which can change the incident ray volume to an optical modulation device without changing the optical output intensity of the lamp, and can exhibit excellent effects in expressive power of an image and adaptability to the use environment. The lighting apparatus of the present invention comprises; a light source, two fly-eye lenses constituting a uniform lighting device, and a shading plate arranged between these fly-eye lenses and constituting a dimming device for adjusting the amount of light of the outgoing light from the light source. The angle of inclination of the shading plate is controlled based on an image signal supplied to the optical modulation device, thereby enabling adjustment of the amount of light.
    Type: Application
    Filed: October 4, 2002
    Publication date: May 8, 2003
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hidehito Ilsaka, Shoichi Uchiyama
  • Patent number: 6538624
    Abstract: In a head-mounted image display apparatus (1) for viewing images on a liquid crystal display means virtually enlarged by an enlarging lens while worn on the head, main apparatus (10) comprises a front case (2), which is positioned at the frontal region side when said main apparatus is worn on the head, and a back case (3), which is positioned at the occipital region. In addition, an air bag (8), which inflates to cause the frontal region to contact a buffer pad affixed to the inside surface of the front case (2), is provided on the inside of the back case (3). The back case (3) is able to rotate on connecting member 5 to the front case (2). Adjustment mechanisms for moving the optical system in the pupil distance direction and in the direction of the optical axes is disposed inside main apparatus (10), and the knobs therefor are centrally disposed on the front of main apparatus (10).
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: March 25, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Joji Karasawa, Shoichi Ishizawa, Shoichi Uchiyama, Yoko Miyazawa
  • Publication number: 20030001498
    Abstract: In the polycrystal diamond thin film in accordance with the present invention, the average particle size is at least 1.5 &mgr;m and, in a Raman spectrum obtained by Raman spectroscopy, a peak intensity near a wave number of 1580 cm−1 has a ratio of 0.2 or less with respect to a peak intensity near a wave number of 1335 cm−1. The photocathode and electron tube in accordance with the present invention comprise the polycrystal diamond thin film as a light-absorbing layer.
    Type: Application
    Filed: August 20, 2002
    Publication date: January 2, 2003
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Minoru Niigaki, Shoichi Uchiyama, Hirofumi Kan
  • Publication number: 20020149709
    Abstract: A method of producing a transmissive screen having a structure including light-absorption-material patterns formed on locations corresponding to locations of lens members, which are provided side by side on a light-transmissive substrate, and to locations of boundary portions between the corresponding lens members. In the method, lens compositions are discharged onto and are caused to land on the light transmissive substrate, and, by drops of the lens compositions, very small lens members or precursors thereof are formed. It is possible to provide a method of producing a transmissive screen, which makes it possible to realize at a low cost a bright transmissive screen which has high contrast ratio and which can display a high-quality image having no moiré and no speckles.
    Type: Application
    Filed: February 28, 2002
    Publication date: October 17, 2002
    Inventors: Shoichi Uchiyama, Satoru Miyashita, Hiroshi Kiguchi, Hironori Hasei