Patents Assigned to Hitachi Plasma Patent Licensing Co., Ltd.
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Patent number: 8373622Abstract: The present method is to drive a plasma display panel which displays a frame composed of a plurality of sub-fields having different weights of luminance. The method comprises using plural kinds of application voltage waveforms different in light emission luminance, as pulse voltages for sustain discharges in display of each sub-field, and adjusting the number of waves in each of the plural kinds of application voltage waveforms according to the weight of luminance set for each sub-field, thereby performing gradation display.Type: GrantFiled: January 19, 2012Date of Patent: February 12, 2013Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Kazushige Takagi, Tadayoshi Kosaka
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Patent number: 8344631Abstract: A method for driving a plasma display panel in which a plurality of first and second electrodes are arranged adjacently each other, a plurality of third electrodes are arranged to cross the first and second electrodes, the plasma display panel having a reset period, an address period, and a sustain discharge period is provided. The method includes in the reset period, applying to the second electrodes a first waveform voltage, whose applied potential increases with time, then applying to the second electrodes a second waveform voltage, whose applied potential decreases with time.Type: GrantFiled: August 8, 2011Date of Patent: January 1, 2013Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
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Patent number: 8114312Abstract: A display device comprising at least one phosphor layer, the phosphor layer containing a green phosphor represented by the following formula: (A1-xBx) (Zn1-yMny) Al10O17 wherein, A is an element selected from Ca, Ba and Sr, B is a rare-earth element, x is a number satisfying 0.0001?x?0.1, and y is a number satisfying 0.02?y?0.14.Type: GrantFiled: February 28, 2005Date of Patent: February 14, 2012Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Toshiaki Onimaru, Shinya Fukuta, Tomonari Misawa, Hironori Sakata, Shigeo Kasahara
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Patent number: 8115703Abstract: A method for driving a plasma display panel is provided in which wasteful power consumption is reduced and light emission efficiency is improved when the number of cells to be lighted is relatively small. The method includes classifying a display ratio into plural group ranges, selecting a suitable display pulse waveform for each group range, detecting the display ratio of an object to be displayed in a real display, and plural types of display pulses having different waveforms are used differently in accordance with the result of the detection. The display ratio means a ratio of the number of cells to be lighted to the number of cells of the screen.Type: GrantFiled: July 5, 2011Date of Patent: February 14, 2012Assignees: Hitachi Plasma Patent Licensing Co., Ltd., Fujitsu Hitachi Plasma Display LimitedInventors: Naoki Itokawa, Yoshiho Seo, Yasunobu Hashimoto, Tetsuya Sakamoto, Tomokatsu Kishi
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Patent number: 8094093Abstract: A AC type plasma display apparatus has been disclosed, which satisfies various requirements such as the number of gradations that can be displayed, the display luminance, and the upper limit of power and, further, the efficiency of light emission and the luminance can be increased as much as possible and the display quality of which is not deteriorated. In the plasma display apparatus, a frame is composed of plural subfields, an image is displayed by causing a sustain discharge to occur in each subfield, the sustain discharge can be caused to occur by at least a first sustain waveform and a second sustain waveform different from the first sustain waveform, and the ratio of the first sustain waveform to the second sustain waveform changes, both waveforms being used to cause the sustain discharge to occur in each subfield.Type: GrantFiled: July 17, 2008Date of Patent: January 10, 2012Assignees: Hitachi Plasma Display Limited, Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Takashi Sasaki, Yuichiro Kimura, Yasunobu Hashimoto, Keizo Suzuki, Kenichi Yamamoto
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Publication number: 20110267378Abstract: A method for driving a plasma display panel is provided in which wasteful power consumption is reduced and light emission efficiency is improved when the number of cells to be lighted is relatively small. The method includes classifying a display ratio into plural group ranges, selecting a suitable display pulse waveform for each group range, detecting the display ratio of an object to be displayed in a real display, and plural types of display pulses having different waveforms are used differently in accordance with the result of the detection. The display ratio means a ratio of the number of cells to be lighted to the number of cells of the screen.Type: ApplicationFiled: July 5, 2011Publication date: November 3, 2011Applicants: HITACHI PLASMA DISPLAY LIMITED, HITACHI PLASMA PATENT LICENSING CO., LTD.Inventors: Naoki Itokawa, Yoshiho Seo, Yasunobu Hashimoto, Tetsuya Sakamoto, Tomokatsu Kishi
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Patent number: 8044888Abstract: A surface-discharge type PDP includes plural electrode pairs formed of first and second sustain electrodes arranged on a first substrate. Each pair extends along a line direction, and the first and second sustain electrodes are in parallel and adjacent to each other. Plural address electrodes arranged on a second substrate opposing the first substrate via a discharge space, each extending along a row direction, a matrix corresponding to a screen to be displayed is formed with the main electrodes and address electrodes, the address electrodes are orthogonal to the main electrodes, each of the address electrode is divided into, for example two partial address electrodes separated from each other by a border line located between adjacent main electrode pairs, whereby the screen is divided into two partial screens, wherein a first clearance between the partial address electrodes is substantially larger than a second clearance between main electrode pair adjacent across the border line.Type: GrantFiled: February 13, 2009Date of Patent: October 25, 2011Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Seiki Kuroki, Nguyen Thanh Nhan
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Patent number: 8018168Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.Type: GrantFiled: August 21, 2007Date of Patent: September 13, 2011Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
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Patent number: 7965261Abstract: A method for driving an AC type surface-discharge display device having cells arranged in a matrix. Each cell has at least three electrodes including a pair of main electrodes and on every line of the matrix and an address electrode on every column of the matrix. The method includes conducting an address preparation period including applying a first charge adjusting voltage, monotonously rising or falling, to a gap between the main electrodes. The method also includes applying a charge adjusting voltage, monotonously rising or falling, to a gap between a scan electrode and the address electrode.Type: GrantFiled: July 25, 2007Date of Patent: June 21, 2011Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: 7825596Abstract: A full color three electrode surface discharge type plasma display device that has fine image elements and is large and has a bright display. The three primary color luminescent areas are arranged in the extending direction of the display electrode pairs in a successive manner and an image element is composed by the three unit luminescent areas defined by these three luminescent areas and address electrodes intersecting these three luminescent areas. Further, phosphors are coated not only on a substrate but also on the side walls of the barriers and on address electrodes. The manufacturing processes and operation methods of the above constructions are also disclosed.Type: GrantFiled: April 14, 2006Date of Patent: November 2, 2010Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Tsutae Shinoda, Noriyuki Awaji, Shinji Kanagu, Tatsutoshi Kanae, Masayuki Wakitani, Toshiyuki Nanto, Mamaru Miyahara
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Patent number: 7825875Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.Type: GrantFiled: January 19, 2006Date of Patent: November 2, 2010Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
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Patent number: 7817113Abstract: A method for driving a plasma display panel having at least first electrodes and second electrodes which cause discharge in cells is provided. The method includes applying a first pulse and a second pulse to the second electrode in an address preparation period. The method also includes applying a scan pulse to the second pulse to the second electrode in an address period. The method includes the first pulse having a voltage changing with time in a positive direction and the second pulse having a voltage changing with time in a negative direction and the scan pulse having a negative voltage which is lower than the attained voltage of the second pulse.Type: GrantFiled: March 24, 2009Date of Patent: October 19, 2010Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: RE41817Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.Type: GrantFiled: February 19, 2009Date of Patent: October 12, 2010Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: RE41832Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.Type: GrantFiled: February 19, 2009Date of Patent: October 19, 2010Assignee: Hitachi Plasma Patent Licensing Co., LtdInventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: RE41872Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.Type: GrantFiled: January 20, 2006Date of Patent: October 26, 2010Assignee: Hitachi Plasma Patent Licensing Co., LtdInventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: RE42405Abstract: A partition is formed by the process including a step for providing a sheet-like partition material that covers a display area and outside thereof on the surface of the substrate, a step for providing a mask for patterning that covers the display area and the outside thereof, so that a pattern of the portion arranged outside of the display area of the mask is a grid-like pattern, a step for patterning the partition material covered partially with the mask by a sandblasting process, and a step for baking the partition material after the patterning.Type: GrantFiled: December 4, 2008Date of Patent: May 31, 2011Assignees: Fujitsu Hitachi Plasma Display Limited, Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Akihiro Fujinaga, Kazunori Ishizuka, Tatsutoshi Kanae, Kazuhide Iwasaki, Toshiyuki Nanto, Yoshimi Kawanami, Masayuki Shibata, Yasuhiko Kunii, Tadayoshi Kosaka, Osamu Toyoda, Yoshimi Shirakawa
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Patent number: RE43267Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.Type: GrantFiled: January 8, 2010Date of Patent: March 27, 2012Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: RE43268Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.Type: GrantFiled: January 8, 2010Date of Patent: March 27, 2012Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: RE43269Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.Type: GrantFiled: October 12, 2010Date of Patent: March 27, 2012Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: RE44003Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.Type: GrantFiled: October 19, 2010Date of Patent: February 19, 2013Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa