Patents by Inventor Atsuo Ohsawa
Atsuo Ohsawa 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: 7898510Abstract: A functional sheet is brought into intimate contact with a front surface of a plasma display panel, and the functional sheet has a structure in which heat diffusion is superior to heat insulation between the plasma display panel and outside air. In addition, a display device includes a controller for controlling a drive voltage pulse train so that power consumption in a unit area in a light emission region within the screen is limited under a set value when one image is displayed.Type: GrantFiled: August 15, 2008Date of Patent: March 1, 2011Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Publication number: 20100219750Abstract: A display panel device includes a front sheet that is glued on a front face of a plasma display panel. The front sheet includes a mesh made of a light shield member that has a blackened front surface and a plane size larger than a screen. A length between diagonal lattice points of the mesh is shorter than a cell pitch that is longer one of the cell pitches in the vertical direction and the horizontal direction of the screen. An arrangement direction of the mesh is inclined with respect to an arrangement direction of the cells in the screen.Type: ApplicationFiled: May 17, 2010Publication date: September 2, 2010Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Patent number: 7755287Abstract: A display panel device includes a front sheet that is glued on a front face of a plasma display panel. The front sheet includes a mesh made of a light shield member that has a blackened front surface and a plane size larger than a screen. A length between diagonal lattice points of the mesh is shorter than a cell pitch that is longer one of the cell pitches in the vertical direction and the horizontal direction of the screen. An arrangement direction of the mesh is inclined with respect to an arrangement direction of the cells in the screen.Type: GrantFiled: December 17, 2007Date of Patent: July 13, 2010Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Patent number: 7561152Abstract: A functional sheet is brought into intimate contact with a front surface of a plasma display panel, and the functional sheet has a structure in which heat diffusion is superior to heat insulation between the plasma display panel and outside air. In addition, a display device includes a controller for controlling a drive voltage pulse train so that power consumption in a unit area in a light emission region within the screen is limited under a set value when one image is displayed.Type: GrantFiled: June 12, 2006Date of Patent: July 14, 2009Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Patent number: 7531952Abstract: A front sheet that is a layered film glued on a front face of a display panel includes a front portion made of plural layers having the same plane size and different functions and a rear portion having a plane size smaller than the front portion and larger than the screen, and the rear portion is put on the front face of the display panel.Type: GrantFiled: January 28, 2005Date of Patent: May 12, 2009Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Yoshimi Kawanami, Nobuyuki Hori, Atsuo Ohsawa, Fumihiro Namiki
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Publication number: 20080309237Abstract: A functional sheet is brought into intimate contact with a front surface of a plasma display panel, and the functional sheet has a structure in which heat diffusion is superior to heat insulation between the plasma display panel and outside air. In addition, a display device includes a controller for controlling a drive voltage pulse train so that power consumption in a unit area in a light emission region within the screen is limited under a set value when one image is displayed.Type: ApplicationFiled: August 15, 2008Publication date: December 18, 2008Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Nobuyuki HORI, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Publication number: 20080106200Abstract: A display panel device includes a front sheet that is glued on a front face of a plasma display panel. The front sheet includes a mesh made of a light shield member that has a blackened front surface and a plane size larger than a screen. A length between diagonal lattice points of the mesh is shorter than a cell pitch that is longer one of the cell pitches in the vertical direction and the horizontal direction of the screen. An arrangement direction of the mesh is inclined with respect to an arrangement direction of the cells in the screen.Type: ApplicationFiled: December 17, 2007Publication date: May 8, 2008Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Patent number: 7332865Abstract: A display panel device includes a front sheet that is glued on a front face of a plasma display panel. The front sheet includes a mesh made of a light shield member that has a blackened front surface and a plane size larger than a screen. A length between diagonal lattice points of the mesh is shorter than a cell pitch that is longer one of the cell pitches in the vertical direction and the horizontal direction of the screen. An arrangement direction of the mesh is inclined with respect to an arrangement direction of the cells in the screen.Type: GrantFiled: October 3, 2006Date of Patent: February 19, 2008Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Publication number: 20070090762Abstract: A display panel device includes a front sheet that is glued on a front face of a plasma display panel. The front sheet includes a mesh made of a light shield member that has a blackened front surface and a plane size larger than a screen. A length between diagonal lattice points of the mesh is shorter than a cell pitch that is longer one of the cell pitches in the vertical direction and the horizontal direction of the screen. An arrangement direction of the mesh is inclined with respect to an arrangement direction of the cells in the screen.Type: ApplicationFiled: October 3, 2006Publication date: April 26, 2007Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Publication number: 20070069629Abstract: An image display device and its manufacture method are provided which are excellent in mass production at low cost and in reliability with a good quality of an assembled panel main body. In a thin type image display device having electrodes and an envelope accommodating components including the electrodes for displaying an image by electrons emitted from the electrodes, conductive adhesive of a low surface resistance is coated on the inner surface of the envelope or on the surfaces of the components accommodated in the envelope. The conductive adhesive has a surface resistance of 1×1010 ?/? or lower.Type: ApplicationFiled: August 29, 2006Publication date: March 29, 2007Applicant: Hitachi, Ltd.Inventors: Tetsu Ohishi, Yoshie Kodera, Atsuo Ohsawa, Akinori Maeda
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Publication number: 20060232523Abstract: A functional sheet is brought into intimate contact with a front surface of a plasma display panel, and the functional sheet has a structure in which heat diffusion is superior to heat insulation between the plasma display panel and outside air. In addition, a display device includes a controller for controlling a drive voltage pulse train so that power consumption in a unit area in a light emission region within the screen is limited under a set value when one image is displayed.Type: ApplicationFiled: June 12, 2006Publication date: October 19, 2006Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Patent number: 7119479Abstract: A display panel device includes a front sheet that is glued on a front face of a plasma display panel. The front sheet includes a mesh made of a light shield member that has a blackened front surface and a plane size larger than a screen. A length between diagonal lattice points of the mesh is shorter than a cell pitch that is longer one of the cell pitches in the vertical direction and the horizontal direction of the screen. An arrangement direction of the mesh is inclined with respect to an arrangement direction of the cells in the screen.Type: GrantFiled: February 3, 2005Date of Patent: October 10, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Patent number: 7116059Abstract: A functional sheet is brought into intimate contact with a front surface of a plasma display panel, and the functional sheet has a structure in which heat diffusion is superior to heat insulation between the plasma display panel and outside air. In addition, a display device includes a controller for controlling a drive voltage pulse train so that power consumption in a unit area in a light emission region within the screen is limited under a set value when one image is displayed.Type: GrantFiled: February 14, 2005Date of Patent: October 3, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Publication number: 20050200264Abstract: A front sheet that is a layered film glued on a front face of a display panel includes a front portion made of plural layers having the same plane size and different functions and a rear portion having a plane size smaller than the front portion and larger than the screen, and the rear portion is put on the front face of the display panel.Type: ApplicationFiled: January 28, 2005Publication date: September 15, 2005Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Yoshimi Kawanami, Nobuyuki Hori, Atsuo Ohsawa, Fumihiro Namiki
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Publication number: 20050184676Abstract: A functional sheet is brought into intimate contact with a front surface of a plasma display panel, and the functional sheet has a structure in which heat diffusion is superior to heat insulation between the plasma display panel and outside air. In addition, a display device includes a controller for controlling a drive voltage pulse train so that power consumption in a unit area in a light emission region within the screen is limited under a set value when one image is displayed.Type: ApplicationFiled: February 14, 2005Publication date: August 25, 2005Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Publication number: 20050174024Abstract: A display panel device includes a front sheet that is glued on a front face of a plasma display panel. The front sheet includes a mesh made of a light shield member that has a blackened front surface and a plane size larger than a screen. A length between diagonal lattice points of the mesh is shorter than a cell pitch that is longer one of the cell pitches in the vertical direction and the horizontal direction of the screen. An arrangement direction of the mesh is inclined with respect to an arrangement direction of the cells in the screen.Type: ApplicationFiled: February 3, 2005Publication date: August 11, 2005Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Nobuyuki Hori, Yoshimi Kawanami, Atsuo Ohsawa, Fumihiro Namiki
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Patent number: 6831995Abstract: In image-capture inspection of electronic displays, the object of the present invention is to reduce moire generation, improve inspection precision by making pixel defects easier to discover, and allowing quantitative evaluation of these pixel defects. The relative positioning of the electronic display and an imaging element is changed by very small amounts of 1/n of the pixel pitch. The n images are arranged by pixel and the images are combined by taking the moving average of the image data values to reduce the image-capture moires generated during the image capture operations. The composite image is used to inspect pixel defects in the electronic display.Type: GrantFiled: March 8, 2000Date of Patent: December 14, 2004Assignee: Hitachi, Ltd.Inventors: Toshio Asano, Kaoru Sakai, Jun Mochizuki, Tatsuo Horiuchi, Hirofumi Nakatoyodome, Tadashi Furukawa, Atsuo Ohsawa
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Patent number: 5613748Abstract: A transmission screen for a rear projection type image display apparatus having at least one image generation source for displaying images, at least one projection lens for enlarging and projecting images displayed on the at least one image generation source onto a rear portion of the transmission screen for display. The transmission screen of the image display apparatus enables display of the images projected onto the transmission screen with a contrast of at least 70. Further, the transmission screen enables display with a field angle within a range of at least 72.degree. to less than 100.degree.. The transmission screen also includes a glossy light absorbing layer and a substantially smooth mirror surface at a light exit surface thereof.Type: GrantFiled: April 18, 1996Date of Patent: March 25, 1997Assignee: Hitachi, Ltd.Inventors: Takahiko Yoshida, Koji Hirata, Atsuo Ohsawa, Kiyoshi Wada, Hiroki Yoshikawa
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Patent number: 5109305Abstract: Four heads are mounted with 90.degree. spacings between them to a rotary cylinder that rotates by 3/4 turn in each one field period of a video signal. Adjacent pairs of these heads having the 90.degree. spacing have different azimuth angles while opposing pairs of the heads having the 180.degree. spacing have mutually the same azimuth angle. A tape is wound helically in about 3/4 turn on the rotary cylinder and travelled thereon, so that the frequency of a pilot signal for tracking control to be recorded on each track with a video signal by each head is different between the tracks and the same frequency as the frequency of the pilot signal reproduced from the reproduction track in the reproducing mode is used as a reference pilot signal for tracking in the reproducing mode.Type: GrantFiled: November 5, 1990Date of Patent: April 28, 1992Assignee: Hitachi, Ltd.Inventors: Atsuo Ohsawa, Shigeyuki Itoh, Nobuyuki Kaku