Patents by Inventor Naoki Kosugi
Naoki Kosugi 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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Publication number: 20070222706Abstract: A method of driving a plasma display panel having display electrode pairs each one of which pairs is formed of a scan electrode and a sustain electrode. A priming electrode is placed in every other spaces between the display electrode pairs and in parallel with the display electrode pairs. An addressing period includes an odd-line addressing period in which an address operation is conducted to primary discharge cells having odd-number scan electrodes, an even-line addressing period in which an address operation is conducted to primary discharge cells having even-number scan electrodes. During the respective addressing periods, scan pulse voltage Va is applied to odd-number scan electrodes or even-number scan electrodes while priming pulse voltage Vp is applied, prior to the application of the scan pulse voltage, to a priming electrode adjacent to the scan electrode to which scan pulse voltage Va is to be applied, in order to generate a priming discharge between the priming electrodes and the data electrodes.Type: ApplicationFiled: September 14, 2005Publication date: September 27, 2007Inventors: Hiroyuki Tachibana, Naoki Kosugi, Toshikazu Wakabayashi, Shigeyuki Okumura
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Publication number: 20070171149Abstract: The present invention aims to provide a PDP apparatus, where a sustain data pulse is applied to data electrodes during a sustain period, having high display quality,and capable of displaying a dark screen image vividly with high contrast without using an error diffusion method, as well as to provide a method of driving the PDP apparatus. In order to achieve the above object, the method of driving the PDP apparatus according to the present invention, during the sustain period, detects an average luminance of a screen image to be displayed, and sets a voltage waveform of a sustain data pulse to be applied to the data electrodes according to the detected average luminance, thereby modulating a luminance of the screen image.Type: ApplicationFiled: June 23, 2004Publication date: July 26, 2007Inventors: Shinichiro Hashimoto, Masatoshi Kitagawa, Yukihiro Morita, Naoki Kosugi
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Publication number: 20070109223Abstract: During each set-up period, wall charges of scan electrodes and sustain electrodes, between which sustain discharges were generated in the previous subfield, are adjusted, and parts toward the sustain electrodes of positive charges in the scan electrodes are replaced by negative charges and parts toward the scan electrodes of negative charges in the sustain electrodes are replaced by positive charges. During each address period, write pulses are applied to the scan electrodes to generate write discharges utilizing priming discharges between the scan electrodes and priming electrodes. During each sustain period, positive charges are accumulated in the entire surfaces of the scan electrodes and negative charges are accumulated in the entire surfaces of the sustain electrodes.Type: ApplicationFiled: June 23, 2004Publication date: May 17, 2007Inventors: Toshikazu Wakabayashi, Hiroyuki Tachibana, Naoki Kosugi, Ryuichi Murai, Kenji Ogawa, Yoshimasa Horie
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Patent number: 7215303Abstract: Plasma display panel (PDP), PDP display apparatus, and method for driving the PDP. The PDP is a surface discharge AC PDP having a first substrate and a second substrate arranged to face each other with barrier ribs interposed therebetween. A first electrode and a second electrode are arranged on a facing surface of the first substrate so as to extend parallel to each other, and are covered with a dielectric layer. A third electrode is arranged on a facing surface of the second substrate so as to extend orthogonally to the first and second electrodes. A discharge gas is enclosed within a discharge space defined between the interposed barrier ribs. In the above PDP, the discharge gas is a gas mixture containing xenon. The xenon component comprises at least 5 vol % and less than 100 vol %, and has a partial pressure of at least 2 kPa. Furthermore, the gap between the first and second electrodes in the PDP is greater than a height of the discharge space.Type: GrantFiled: December 11, 2000Date of Patent: May 8, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toru Ando, Hiroyuki Tachibana, Naoki Kosugi
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Patent number: 7176852Abstract: A front substrate contains a plurality of scan electrodes and sustain electrodes. Two strips of scan electrodes and two strips of sustain electrodes are alternately disposed on the substrate. In addition, a plurality of auxiliary scan electrodes is disposed on the front substrate so as to be parallel to the scan electrodes. On the back substrate, a plurality of priming electrodes is disposed parallel to the scan electrodes. Each auxiliary scan electrode has electrical connections to the scan electrode that performs scanning earlier than the scan electrode adjacent to each auxiliary scan electrode. With the structure above, a priming discharge occurs between the auxiliary scan electrodes and the priming electrodes.Type: GrantFiled: March 23, 2004Date of Patent: February 13, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Tachibana, Naoki Kosugi, Toshikazu Wakabayashi
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Patent number: 7141929Abstract: A plasma display panel to stabilize address properties. A front substrate (1) and a back substrate (2) face each other, to form a discharge space (3) which is partitioned by barrier ribs (11) to form priming discharge cells (16) and main discharge cells (12). A dielectric layer (17) is formed on the back substrate (2) on which the priming discharge cell (16) is present. Insulation is ensured between a data electrode (10) and the priming electrode (15) because the latter is formed on the dielectric layer (17). One is able to generate a priming discharge before a main discharge.Type: GrantFiled: March 25, 2004Date of Patent: November 28, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Tachibana, Naoki Kosugi, Tsuyoshi Nishio, Masaki Nishimura
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Patent number: 7084569Abstract: A highly reliable plasma display panel is provided with less difference in wiring resistance, which can be driven at high speed even though the front or rear board has multilayer electrode wiring. A data electrode is covered with a dielectric layer, and a priming electrode is provided on the dielectric layer. An external wiring lead-out of the data electrode is provided on a rear substrate, and an external wiring lead-out of the priming electrode is provided on the dielectric layer. Wiring lead-out of the data electrode and wiring lead-out of the priming electrode have a step equivalent to the thickness of the dielectric layer.Type: GrantFiled: February 18, 2004Date of Patent: August 1, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Tachibana, Naoki Kosugi, Masafumi Okawa, Ryuichi Murai
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Patent number: 7030562Abstract: The invention is a plasma display panel capable of stabilizing the addressing characteristics. A barrier rib is formed by longitudinal barrier ribs portion orthogonal to the scan electrodes and sustain electrodes on the front substrate, and side barrier rib portions crossing with these longitudinal barrier rib portions, to form cell spaces and form interstice portions between the cell spaces, and priming electrodes for producing a discharge between the front substrate and the rear substrate within the interstice portions are formed. Stable priming discharge is produced with certainty by the scan electrode and the priming electrode, hence decreasing the discharge time lag at the time of addressing and stabilizing the addressing characteristics.Type: GrantFiled: October 24, 2003Date of Patent: April 18, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Tachibana, Naoki Kosugi, Tomohiro Murakoso, Nobuaki Nagao, Ryuichi Murai
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Publication number: 20060050023Abstract: A method of driving a plasma display panel including priming electrodes (PR1 to PRn). In the writing period of a sub-field, prior to scanning of respective scan electrodes (SC1 to SCn), priming discharge is caused between the scan electrodes (SC1 to SCn) and the priming electrodes (PR1 to PRn). The time interval between the application of voltage to the priming electrodes (PR1 to PRn) for causing the priming discharge and the scanning of the corresponding scan electrodes (SC1 to SCn) is set within 10 ?s.Type: ApplicationFiled: March 23, 2004Publication date: March 9, 2006Inventors: Hiroyuki Tachibana, Naoki Kosugi, Nobuaki Nagao, Ryuichi Murai
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Patent number: 7009587Abstract: A gas discharge panel includes a first substrate and a second substrate. A plurality of display electrode pairs which are each made up of a sustain electrode and a scan electrode are formed on the first substrate, and the first substrate and the second substrate are set facing each other with a plurality of barrier ribs in between so as to form a plurality of cells. In this gas discharge panel, at least one of the sustain electrode and the scan electrode includes: a plurality of line parts; and a discharge developing part which makes a gap between adjacent line parts smaller in areas corresponding to channels between adjacent barrier ribs than in areas corresponding to the barrier ribs.Type: GrantFiled: August 16, 2001Date of Patent: March 7, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masaki Nishimura, Hidetaka Higashino, Ryuichi Murai, Yuusuke Takada, Nobuaki Nagao, Toru Ando, Naoki Kosugi, Hiroyuki Tachibana
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Publication number: 20060033681Abstract: The present invention aims to provide a PDP apparatus and a driving method for the same which can improve display quality by reducing a peak value of a discharge current flowing in scan and sustain electrodes in a sustain period, without an increase in manufacturing cost. This is achieved as follows. A driving unit 20 applies a sustain data pulse 320 to a plurality of third electrodes in a sustain period T3. Here, a voltage waveform of the sustain data pulse 320 starts to rise after a voltage of each of pulses 300 and 310 applied to a pair of a scan electrode SCN and a sustain electrode SUS reaches a predetermined level. Furthermore, the sustain data pulse 320 rises at a different timing at least from a sustain data pulse 320 applied to an adjacent data electrode.Type: ApplicationFiled: November 13, 2003Publication date: February 16, 2006Inventors: Shinichiro Hashimoto, Masatoshi Kitagawa, Yukihiro Morita, Naoki Kosugi
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Publication number: 20050219156Abstract: The initializing period of at least one of a plurality of sub-fields constituting one field is a selective initializing period for selectively initializing discharge cells in which sustain discharge has occurred in the sustaining period of the preceding sub-field. In the sustaining period of the sub-field prior to the sub-field including the selective initializing period, voltage Vr is applied to a priming electrode (PRi) for causing discharge between the priming electrode (PRi) and corresponding scan electrode (SCi) using the priming electrode (PRi) as a cathode.Type: ApplicationFiled: March 23, 2004Publication date: October 6, 2005Inventors: Hiroyuki Tachibana, Naoki Kosugi, Toshikazu Wakabayashi, Yasuaki Muto
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Publication number: 20050219160Abstract: Front substrate (1) contains a plurality of scan electrodes (6) and sustain electrodes (7). Two strips of scan electrodes (6) and two strips of sustain electrodes (7) are alternately disposed on the substrate. In addition, a plurality of auxiliary scan electrodes (20) is disposed on front substrate (1) so as to be parallel to scan electrodes (6). On back substrate (2), a plurality of priming electrodes (14) is disposed parallel to scan electrodes (6). Each auxiliary scan electrode (20) has electrical connections to the scan electrode that performs scanning earlier than the scan electrode adjacent to each auxiliary scan electrode (20). With the structure above, a priming discharge occurs between auxiliary scan electrodes (20) and priming electrodes (14).Type: ApplicationFiled: March 23, 2004Publication date: October 6, 2005Inventors: Hiroyuki Tachibana, Naoki Kosugi, Toshikazu Wakabayashi
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Publication number: 20050151476Abstract: A highly reliable plasma display panel with less difference in wiring resistance, which can be driven at high speed even though the front or rear board has multilayer electrode wiring. Data electrode (9) is covered with dielectric layer (15), and priming electrode (14) is provided on dielectric layer (15). External wiring lead-out (19) of data electrode (9) is provided on rear substrate (200), and external wiring lead-out (18) of priming electrode (14) is provided on dielectric layer (15). Wiring lead-out (19) and wiring lead-out (18) have step (20) equivalent to the thickness of dielectric layer (15).Type: ApplicationFiled: February 18, 2004Publication date: July 14, 2005Inventors: Hiroyuki Tachibana, Naoki Kosugi, Masafumi Okawa, Ryuichi Murai
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Publication number: 20050146274Abstract: A plasma display panel can stabilize address properties. A front substrate (1) and a back substrate (2) are disposed to face each other, and a discharge space (3) is formed and partitioned by barrier ribs (11) so as to form priming discharge cells (16) and main discharge cells (12). Forming priming electrodes (15) onto a dielectric layer (17) in the priming discharge cells (16) can secure the isolation voltage between data electrodes (10) and the priming electrodes (15), and can also secure the generation of a priming discharge prior to a main discharge.Type: ApplicationFiled: March 25, 2004Publication date: July 7, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Tachibana, Naoki Kosugi, Tsuyoshi Nishio, Masaki Nishimura
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Patent number: 6873103Abstract: A gas discharge panel having plural pairs of display electrodes disposed so as to extend through a plurality of cells, each pair being formed from a sustain electrode and a scan electrode. The sustain and scan electrodes each include a plurality of line parts, and an aggregate width of the line parts included in the sustain and scan electrodes is in a range of 22% to 48% inclusive of pixel pitch.Type: GrantFiled: August 27, 2001Date of Patent: March 29, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yuusuke Takada, Toru Ando, Nobuaki Nagao, Hidetaka Higashino, Masaki Nishimura, Ryuichi Murai, Yoshio Watanabe, Naoki Kosugi, Hiroyuki Tachibana, Koichi Wani
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Publication number: 20050040766Abstract: The invention is a plasma display panel capable of stabilizing the addressing characteristics. A barrier rib is formed by longitudinal barrier ribs portion orthogonal to the scan electrodes and sustain electrodes on the front substrate, and side barrier rib portions crossing with these longitudinal barrier rib portions, to form cell spaces and form interstice portions between the cell spaces, and priming electrodes for producing a discharge between the front substrate and the rear substrate within the interstice portions are formed. Stable priming discharge is produced with certainty by the scan electrode and the priming electrode, hence decreasing the discharge time lag at the time of addressing and stabilizing the addressing characteristics.Type: ApplicationFiled: October 24, 2003Publication date: February 24, 2005Inventors: Hiroyuki Tachibana, Naoki Kosugi, Tomohiro Murakoso, Nobuaki Nagao, Ryuichi Murai
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Patent number: 6817917Abstract: A PDP operates with high luminous efficiency and reproduces colors faithfully. When sealing the PDP, a sealant layer (15) is formed around the facing main surfaces of the front panel (10) and the back panel (20). Protrusions (16) and depressions (17) are formed in parts of the sealant layer (15) to produce gaps (18) at the periphery of the PDP. The heating performed to soften the sealant layer (15) is conducted in a dry gas atmosphere. As a result, moisture passes from the inner space of the PDP through the gaps (18) and out of the PDP, thereby reducing the heat deterioration in the blue phosphor layer (25).Type: GrantFiled: January 23, 2001Date of Patent: November 16, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Kado, Kanako Miyashita, Naoki Kosugi, Yasuhisa Ishikura, Utaro Miyagawa, Shigeo Haruki
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Publication number: 20040164930Abstract: A plasma display panel device having high luminance efficiency and a drive method for the PDP device, which includes a panel unit having a plurality of pairs of a first and a second electrode, and a plurality of third electrodes that intersect the electrode pairs to define a plurality of discharge cells, and a drive unit that drives the panel unit using a drive method having a write period and a sustain period, by applying, in the sustain period, a voltage to the third electrodes and a voltage to the electrode pairs, so as to generate a sustain discharge between the first and second electrodes in the sustain period, the drive unit applying the voltage to the third electrodes so as to change a potential of the third electrodes during the sustain discharge.Type: ApplicationFiled: November 28, 2003Publication date: August 26, 2004Inventors: Shinichiro Hashimoto, Masatoshi Kitagawa, Yukihiro Morita, Naoki Kosugi
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Patent number: 6707259Abstract: A gas discharge panel having (i) a plurality of cells arranged in a matrix between a pair of opposing substrates, the cells being filled with a discharge gas, and (ii) plural pairs of display electrodes arranged on a surface of one of the substrates so as to extend through the plurality of cells, each pair of display electrodes being composed of a sustain electrode and a scan electrode that define a main discharge gap therebetween. In such a gas discharge panel, each sustain electrode and scan electrode includes a plurality of line parts that extend in a row direction of the matrix. Furthermore, the main discharge gap and a line part gap between adjacent line parts are provided such that a discharge current waveform of the display electrodes has a single peak when the gas discharge panel is driven.Type: GrantFiled: October 7, 2002Date of Patent: March 16, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Nobuaki Nagao, Hidetaka Higashino, Toru Ando, Yuusuke Takada, Masaki Nishimura, Ryuichi Murai, Koichi Wani, Naoki Kosugi, Hiroyuki Tachibana, Yoshio Watanabe