Patents by Inventor Shigeru Iwaoka
Shigeru Iwaoka 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: 7777695Abstract: A plasma display device which selectively generates address discharge in each display cell in accordance with pixel data based on a video signal in an address period, applies a sustain pulse between row electrodes forming each row electrode pair in a sustain period, and applies, in the sustain period, a discharge timing control pulse to one row electrode of each row electrode pair, so that the discharge timing control pulse partly overlaps with a first sustain pulse in terms of time, which is applied to the other row electrode of each row electrode pair.Type: GrantFiled: June 7, 2006Date of Patent: August 17, 2010Assignee: Panasonic CorportionInventors: Motofumi Ikeda, Yoshichika Sato, Nobuhiko Saegusa, Shigeru Iwaoka
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Patent number: 7764250Abstract: A plasma display device which comprises a magnesium oxide layer formed on a plane in contact with the discharge space in each display cell of a plasma display panel, having magnesium oxide crystals that perform cathode luminescence light emission with a peak in a wavelength band of 200 to 300 nm as a result of excitation caused by electron-beam irradiation. Each of the display cells is set in a lit cell state or an unlit cell state by selectively inducing an address discharge, and only the display cells set in the lit cell state are caused to perform a sustain discharge by applying a sustain pulse after the selective scanning has ended.Type: GrantFiled: January 18, 2006Date of Patent: July 27, 2010Assignee: Panasonic CorporationInventors: Masaru Nishimura, Shigeru Iwaoka
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Patent number: 7710353Abstract: A method of driving a display panel is provided which can reduce power consumption. During a unit display period, the number of times of second and subsequent selective erase operations performed on one display cell of each pixel is different from the number of times of second and subsequent selective erase operations performed on another display cell emitting light of different color from that of the one display cell.Type: GrantFiled: February 27, 2006Date of Patent: May 4, 2010Assignee: Panasonic CorporationInventors: Yoshichika Sato, Kazuaki Sakata, Shigeru Iwaoka, Kenichiro Hosoi, Takeharu Iwata
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Patent number: 7333076Abstract: A method for driving a display panel with which the dark contrast can be improved is provided. Each of at least two successive sub-fields including a leading sub-field includes a selective write addressing step for setting the discharge cells to a lighted discharge cell mode by selectively causing a writing discharge in the discharge cells in accordance with the video signal. The sub-fields following at least two sub-fields include a selective erasure addressing step for setting the discharge cells to an unlighted discharge cell mode by selectively causing an erasing discharge in the discharge cells in accordance with the video signal and an emission sustain step for repeatedly causing a sustain discharge corresponding to a weighting of that sub-field only in the discharge cells that are in the lighted discharge cell mode.Type: GrantFiled: September 11, 2003Date of Patent: February 19, 2008Assignees: Pioneer Corporation, Pioneer Display Products CorporationInventors: Hideto Nakamura, Mitsunori Taguchi, Tsutomu Tokunaga, Shigeru Iwaoka, Nobuhiko Saegusa
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Patent number: 7187348Abstract: A driving method for a plasma display panel realizes a high quality display at low power consumption while restraining a false contour. After a selective discharge for setting discharge cells to a light-on state or a light-off state is generated in one subfield of N subfields constituting each field, the selective discharge is generated again only in subfields placed at predetermined positions from the beginning of each field.Type: GrantFiled: June 28, 2002Date of Patent: March 6, 2007Assignees: Pioneer Corporation, Pioneer Display Products CorporationInventors: Takashi Iwami, Shigeru Iwaoka
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Patent number: 7176856Abstract: The present invention is a display device and display panel drive method that allow a more rapid select operation to be stably implemented by increasing the discharge probability of selective discharge. The display device comprises an address part that sequentially applies a positive scan pulse to a first row electrode of each of the display panel row electrode pairs in the address cycle while sequentially applying a pixel data pulse corresponding to the pixel data at the same timing as the scan pulse to each of the display panel column electrodes one display line at a time so that the column electrode side constitutes a cathode, such that an address discharge is selectively produced in the second discharge cell; and a sustain part that applies a sustain pulse to each of the row electrodes constituting the row electrode pairs in the sustain cycle, and the sustain part applies the ultimate sustain pulse of the sustain pulses applied in the address cycle to the first row electrode with a negative polarity.Type: GrantFiled: December 24, 2003Date of Patent: February 13, 2007Assignee: Pioneer CorporationInventors: Kazuo Yahagi, Tsutomu Tokunaga, Yuya Shiozaki, Shigeru Iwaoka
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Publication number: 20060290602Abstract: A plasma display device which selectively generates address discharge in each display cell in accordance with pixel data based on a video signal in an address period, applies a sustain pulse between row electrodes forming each row electrode pair in a sustain period, and applies, in the sustain period, a discharge timing control pulse to one row electrode of each row electrode pair, so that the discharge timing control pulse partly overlaps with a first sustain pulse in terms of time, which is applied to the other row electrode of each row electrode pair.Type: ApplicationFiled: June 7, 2006Publication date: December 28, 2006Inventors: Motofumi Ikeda, Yoshichika Sato, Nobuhiko Saegusa, Shigeru Iwaoka
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Patent number: 7136034Abstract: A display panel includes a plurality of unit light emission areas (light emission elements) arranged in a matrix. Each unit light emission area is defined by a first discharge cell and a second discharge cell. The second discharge cell has a light-absorbing layer. When the display panel is driven to express an image having a plurality of gradation levels, address discharge is selectively caused in the second discharge cells in accordance with an input image signal. Light leaks to the first discharge cell from the second discharge cell upon the address discharge. This light is used to express the gradation of low luminance. Since luminance difference between gradation levels of a low luminance image is reduced, it is possible to display a high quality, low luminance image.Type: GrantFiled: October 6, 2003Date of Patent: November 14, 2006Assignees: Pioneer Corporation, Pioneer Display Products CorporationInventors: Tsutomu Tokunaga, Nobuhiko Saegusa, Kazuo Yahagi, Mitsushi Kitagawa, Shigeru Iwaoka
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Publication number: 20060227072Abstract: A method of driving a display panel is provided which can reduce power consumption. During a unit display period, the number of times of second and subsequent selective erase operations performed on one display cell of each pixel is different from the number of times of second and subsequent selective erase operations performed on another display cell emitting light of different color from that of the one display cell.Type: ApplicationFiled: February 27, 2006Publication date: October 12, 2006Inventors: Yoshichika Sato, Kazuaki Sakata, Shigeru Iwaoka, Kenichiro Hosoi, Takeharu Iwata
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Patent number: 7091668Abstract: A display and a driving method of a display panel capable of improving a dark contrast.Type: GrantFiled: October 3, 2003Date of Patent: August 15, 2006Assignees: Pioneer Corporation, Pioneer Display Products CorporationInventors: Kazuo Yahagi, Mitsushi Kitagawa, Nobuhiko Saegusa, Shigeru Iwaoka, Tsutomu Tokunaga, Ryo Suzue
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Publication number: 20060175976Abstract: A plasma display device which comprises a magnesium oxide layer formed on a plane in contact with the discharge space in each display cell of a plasma display panel, having magnesium oxide crystals that perform cathode luminescence light emission with a peak in a wavelength band of 200 to 300 nm as a result of excitation caused by electron-beam irradiation. Each of the display cells is set in a lit cell state or an unlit cell state by selectively inducing an address discharge, and only the display cells set in the lit cell state are caused to perform a sustain discharge by applying a sustain pulse after the selective scanning has ended.Type: ApplicationFiled: January 18, 2006Publication date: August 10, 2006Inventors: Masaru Nishimura, Shigeru Iwaoka
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Publication number: 20050073479Abstract: A display apparatus which sequentially applies a scanning pulse to one row electrode of the row electrode pair while applying a pixel data pulse corresponding to the pixel data to the column electrodes one display line by one display line, simultaneously with the scanning pulse, to selectively produce an address discharge in the second discharge cell in the address period, applies a sustain pulse to the row electrode pairs in the sustain period, and produces a reset discharge in the same discharge current direction as the address discharge between one row electrode of the row electrode pair and the column electrode in the second discharge cell immediately before the address period of at least the first sub-field of the one-field display period, and a method of driving the display panel.Type: ApplicationFiled: September 30, 2004Publication date: April 7, 2005Inventors: Hikaru Takahashi, Hideto Endo, Keishi Saito, Kazuo Yahagi, Yuya Shiozaki, Yuichi Sakai, Shigeru Iwaoka, Nobuhiko Saegusa
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Publication number: 20040179004Abstract: The present invention is a display device and display panel drive method that allow a more rapid select operation to be stably implemented by increasing the discharge probability of selective discharge. The display device comprises an address part that sequentially applies a positive scan pulse to a first row electrode of each of the display panel row electrode pairs in the address cycle while sequentially applying a pixel data pulse corresponding to the pixel data at the same timing as the scan pulse to each of the display panel column electrodes one display line at a time so that the column electrode side constitutes a cathode, such that an address discharge is selectively produced in the second discharge cell; and a sustain part that applies a sustain pulse to each of the row electrodes constituting the row electrode pairs in the sustain cycle, and the sustain part applies the ultimate sustain pulse of the sustain pulses applied in the address cycle to the first row electrode with a negative polarity.Type: ApplicationFiled: December 24, 2003Publication date: September 16, 2004Applicant: PIONEER CORPORATIONInventors: Kazuo Yahagi, Tsutomu Tokunaga, Yuya Shiozaki, Shigeru Iwaoka
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Publication number: 20040104685Abstract: A display and a driving method of a display panel capable of improving a dark contrast.Type: ApplicationFiled: October 3, 2003Publication date: June 3, 2004Applicants: PIONEER CORPORATION, PIONEER DISPLAY PRODUCTS CORPORATIONInventors: Kazuo Yahagi, Mitsushi Kitagawa, Nobuhiko Saegusa, Shigeru Iwaoka, Tsutomu Tokunaga, Ryo Suzue
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Publication number: 20040066394Abstract: A display panel includes a plurality of unit light emission areas (light emission elements) arranged in a matrix. Each unit light emission area is defined by a first discharge cell and a second discharge cell. The second discharge cell has a light-absorbing layer. When the display panel is driven to express an image having a plurality of gradation levels, address discharge is selectively caused in the second discharge cells in accordance with an input image signal. Light leaks to the first discharge cell from the second discharge cell upon the address discharge. This light is used to express the gradation of low luminance. Since luminance difference between gradation levels of a low luminance image is reduced, it is possible to display a high quality, low luminance image.Type: ApplicationFiled: October 6, 2003Publication date: April 8, 2004Applicants: PIONEER CORPORATION, PIONEER DISPLAY PRODUCTS CORPORATIONInventors: Tsutomu Tokunaga, Nobuhiko Saegusa, Kazuo Yahagi, Mitsushi Kitagawa, Shigeru Iwaoka
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Publication number: 20040051689Abstract: A method for driving a display panel with which the dark contrast can be improved is provided. Each of at least two successive sub-fields including a leading sub-field includes a selective write addressing step for setting the discharge cells to a lighted discharge cell mode by selectively causing a writing discharge in the discharge cells in accordance with the video signal. The sub-fields following at least two sub-fields include a selective erasure addressing step for setting the discharge cells to an unlighted discharge cell mode by selectively causing an erasing discharge in the discharge cells in accordance with the video signal and an emission sustain step for repeatedly causing a sustain discharge corresponding to a weighting of that sub-field only in the discharge cells that are in the lighted discharge cell mode.Type: ApplicationFiled: September 11, 2003Publication date: March 18, 2004Applicant: PIONEER CORPORATION, PIONEER DISPLAY PRODUCTS CORPORATIONInventors: Hideto Nakamura, Mitsunori Taguchi, Tsutomu Tokunaga, Shigeru Iwaoka, Nobuhiko Saegusa
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Patent number: 6667727Abstract: A plasma display apparatus which is capable of reducing power consumption and achieving a high definition display. A plasma display panel has a plurality of first row electrodes and second row electrodes extending in a horizontal direction and formed in alternation, a discharge space filled with a discharge gas, and a plurality of column electrodes formed opposite to and extending in a direction perpendicular to the first row electrodes and the second row electrodes through the discharge space. The plasma display panel also has discharge cells corresponding to pixels, formed at respective intersections of the first row electrodes and second row electrodes with the column electrodes, and a spacing between each of the first row electrodes and each of the second row electrode is conformed to a display line on the screen.Type: GrantFiled: October 27, 2000Date of Patent: December 23, 2003Assignee: Pioneer CorporationInventor: Shigeru Iwaoka
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Publication number: 20030006944Abstract: A driving method for a plasma display panel realizes a high quality display at low power consumption while restraining a false contour. After a selective discharge for setting discharge cells to a light-on state or a light-off state is generated in one subfield of N subfields constituting each field, the selective discharge is generated again only in subfields placed at predetermined positions from the beginning of each field.Type: ApplicationFiled: June 28, 2002Publication date: January 9, 2003Applicant: PIONEER CORPORATIONInventors: Takashi Iwami, Shigeru Iwaoka