More Than Two Electrodes Per Element Patents (Class 345/67)
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Patent number: 7136033Abstract: A method of driving a 3-electrode plasma display apparatus including a 3-electrode plasma display panel, a video processor, a controller, an address driver, an X-driver, a Y-driver, and a power recovery circuit is provided. In the 3-electrode plasma display panel, X-electrode lines and Y-electrode lines are alternately arranged in parallel on the rear surface of a front transparent substrate so as to form XY-electrode line pairs, and address electrode lines are arranged on the front surface of a rear transparent substrate to cross the XY-electrode line pairs. The intersections between the XY-electrode line pairs and the address electrode lines define display cells. The power recovery circuit is included in the address driver. The power recovery circuit collects charges unnecessarily remaining in the display cells at the end of application of the display data signals and applies the collected charges to the display cells at the start of application of the display data signals.Type: GrantFiled: July 7, 2003Date of Patent: November 14, 2006Assignee: Samsung SDI Co., Ltd.Inventors: Jin-Sung Kim, Yoon-Phil Eo
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Patent number: 7133007Abstract: 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: March 24, 2004Date of Patent: November 7, 2006Assignee: Hitachi, Ltd.Inventors: Tsutae Shinoda, Shinji Kanagu, Tatsutoshi Kanae, Masayuki Wakitani, Toshiyuki Nanto
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Patent number: 7116288Abstract: A driving method of a plasma display panel having a display electrodes arranged at the ratio of three per two rows is provided, in which all rows are lighted in sustaining period from an addressing period to the next addressing period and electromagnetic interference is reduced sufficiently. A display discharge is generated by controlling potentials of the display electrodes so as to satisfy two conditions. One condition is that there is a pair of display electrodes having terminals at the same side of the display screen and current directions opposite to each other. Another condition is to generate a potential difference across the display electrodes, which is necessary for discharging. Magnetic fields are canceled by each other in the pair of electrodes having current directions opposite to each other, so that electromagnetic interference is reduced.Type: GrantFiled: June 21, 2001Date of Patent: October 3, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Takashi Shiizaki, Hitoshi Hirakawa
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Patent number: 7116289Abstract: Technology that enables writing in a PDP to be conducted effectively, even when a time period of the writing is shortened. In a PDP driven by a method in which a write discharge is selectively generated in a plurality of cells by applying a scan pulse sequentially to a plurality of first electrodes and a data pulse selectively to a plurality of third electrodes in a write period, the technology provides for a write auxiliary discharge to be generated at least in a cell selected for writing or in a vicinity of the selected cell when the scan pulse is applied in the write period, the write auxiliary discharge being smaller in magnitude than the write discharge. The write auxiliary discharge results in the generation of priming particles in or in a vicinity of the selected cell, and these priming particles facilitate the generation of a write discharge in the selected cell.Type: GrantFiled: August 28, 2001Date of Patent: October 3, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Kazuhiro Yamada
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Patent number: 7116060Abstract: A plasma display panel having a plurality of bi-discharge sources comprising a front substrate and a rear substrate coupled in parallel; a plurality of first electrodes, second electrodes and third electrodes in parallel disposed over the front substrate along a first direction; a plurality of rear substrate walls disposed in parallel over the rear substrate along a second direction orthogonal to the first direction. Each of the plurality of second electrodes is centered between each of the plurality of first and third electrodes, which leads to a bi-discharge source. In each of the plurality of second electrodes, one side is induced as having a plurality of positive charges and the other side with a plurality of negative charges, which are equal amount and thus result in charge counterbalance on the second electrode.Type: GrantFiled: December 9, 2004Date of Patent: October 3, 2006Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Chun-Hsu Lin, Po-Kun Hsieh, Hsu-Pin Kao
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Patent number: 7109662Abstract: A method of driving a PDP including alternately-arranged X and Y electrodes and A electrodes crossing the X and Y electrodes provides a recurring cycle of a resetting period, an addressing period, and a sustaining period. The method includes applying a ramp waveform in the resetting period. Discharge starting threshold voltages between the X and Y electrodes and between the A and Y electrodes are denoted by VtXY and VtAY, respectively. Voltages applied between the X and Y electrodes and between the A and Y electrodes at the trailing edge of the ramp waveform are denoted by VXY and VAY, respectively. An offset voltage of the voltage applied between the A and Y electrodes at the end of the sustaining period is denoted by Vaoff. In such a case, the voltage of a driving waveform for each electrode is set so as to satisfy the relational expression “2 VtAY?VtXY>2VAY?VXY?2Vaoff”.Type: GrantFiled: August 6, 2003Date of Patent: September 19, 2006Assignee: Hitachi, Ltd.Inventor: Koichi Sakita
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Patent number: 7106279Abstract: To provide an electro-optical device and an electronic apparatus capable of maintaining the display quality by preventing brightness unevenness without widening a frame in a mounting terminal portion connection portions connecting to a fourth power source bus line are provided in two places. Driving current is supplied from the connection portions to the fourth power source bus line. The width of the fourth power source bus line is smaller than that of the width of a power source bus line supplying driving current from one place of the mounting terminal portion.Type: GrantFiled: June 13, 2003Date of Patent: September 12, 2006Assignee: Seiko Epson CorporationInventor: Hiroshi Hirayama
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Patent number: 7106278Abstract: A plasma display panel and a driving method thereof that are capable of improving the discharge efficiency and the brightness. In the panel, sustaining electrodes are formed at the boundary portions between the discharge cells. Trigger electrodes are formed at the inner sides of the discharge cells. Lattice-shaped barrier ribs are formed in such a manner to surround the discharge cells. The method of driving the panel includes a reset period, an address period and a sustaining period. In the method, a reset pulse is applied to the sustaining electrodes during the reset period. A scanning pulse is applied to the trigger electrodes during the address period. A first sustaining pulse is applied to the trigger electrodes during the sustaining period. A second sustaining pulse is applied to the sustaining electrodes in such a manner to be alternate with the first sustaining pulse.Type: GrantFiled: February 2, 2001Date of Patent: September 12, 2006Assignee: LG Electronics Inc.Inventors: Jae Sung Kim, Eun Cheol Lee, Seok Dong Kang
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Patent number: 7091965Abstract: (N+j)th (1?j?N, N and j are integers) and (2N+j)th scan electrodes are disposed corresponding to a jth scan electrode. An (M+k)th (1?k?M, M and k are integers) signal electrode and a kth electrode are disposed corresponding to a kth signal electrode. A first pixel switch element connects a pixel electrode with the kth signal electrode based on a voltage of the jth scan electrode. A second pixel switch element connects the pixel electrode with the (M+k)th signal electrode based on a voltage of the (N+j)th scan electrode. A switch element connects the pixel electrode with the kth electrode based on a voltage of the (2N+j)th scan electrode.Type: GrantFiled: February 4, 2003Date of Patent: August 15, 2006Assignee: Seiko Epson CorporationInventor: Akira Morita
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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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Patent number: 7088313Abstract: A white balance compensating method of a plasma display panel includes detecting an average brightness of an input data; determining a discharge frequency in accordance with the average brightness of the data; and applying gamma correction to the data in consideration of the discharge frequency. A white balance compensating apparatus of a plasma display panel includes an average picture level controller for detecting an average brightness of an input data and determining a discharge frequency in accordance with the average brightness of the data; and a gamma corrector for applying gamma correction to the data in consideration of the discharge frequency.Type: GrantFiled: February 7, 2003Date of Patent: August 8, 2006Assignee: LG Electronics Inc.Inventor: Seong Ho Kang
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Patent number: 7079090Abstract: A driving method and a PDP apparatus of a dot-matrix type PDP, in which a display of high-luminance and high-quality can be obtained when driven by the interlacing method, have been disclosed. In the driving method to drive, using the interlacing method, a dot matrix type AC plasma display panel comprising display electrodes that are arranged adjacently, extend in the same direction, and execute a light-emitting action in each display cell, and a rib that separates individual display cells, wherein a display line is formed between every pair of the display electrodes, the data in a line of the interlaced signal is displayed simultaneously in two neighboring lines and the centers of display are shifted in the odd field and the even field.Type: GrantFiled: November 15, 2002Date of Patent: July 18, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Masanori Takeuchi, Hideaki Ohki
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Patent number: 7068245Abstract: A plasma display apparatus has a waveform of a driving voltage supplied from a driver. The waveform has a sustaining period when a sustaining pulse is alternately applied to scanning electrodes and sustain electrodes for keeping discharge. Besides, the waveform has an erasing period when a ramp voltage pulse whose polarity differs from that of a sustaining pulse is applied to an electrode, which differs from an electrode where a last pulse of the sustaining pulse is applied. As a result, false discharge is prevented, and a stable image can be displayed.Type: GrantFiled: June 24, 2003Date of Patent: June 27, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Nobuaki Nagao, Junpei Hashiguchi, Katsutoshi Shindo, Toshikazu Wakabayashi
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Patent number: 7068243Abstract: The plasma display device has pixels each formed by a plurality of sub pixels of the same color provided in an address-electrode direction, and provides gray-scale display by controlling the number of sub pixels to be turned ON. A plurality of address electrodes are provided for each sub pixels. Each sub pixel is addressed by a conductive layer which is electrically connected to one of the plurality of address electrodes.Type: GrantFiled: October 16, 2002Date of Patent: June 27, 2006Assignee: Sharp Kabushiki KaishaInventor: Takashi Morimoto
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Patent number: 7042424Abstract: The object of the invention is to provide a method for driving a plasma display panel that provides an improved expression of levels of halftone as well as an improved display quality. In N sub-fields constituting a display period of one field, when a pixel data writing step for setting discharge cells to either one of non-light-emitting cells or light-emitting cells in response to pixel data and a light-emission sustaining step for allowing only the aforementioned light-emitting cells to emit light only during a light-emission period corresponding to weights assigned to the sub-fields respectively are executed, the light-emission period in the light-emission sustaining step of the respective sub-fields is changed field by field or frame by frame. According to another aspect, the invention allows for carrying out selectively a first drive pattern or a second drive pattern.Type: GrantFiled: July 24, 2003Date of Patent: May 9, 2006Assignee: Pioneer CorporationInventors: Tetsuya Shigeta, Hitoshi Mochizuki, Masahiro Suzuki, Nobuhiko Saegusa
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Patent number: 7027012Abstract: 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: June 4, 2003Date of Patent: April 11, 2006Assignee: Fujitsu LimitedInventors: Seiki Kuroki, Nguyen Thanh Nhan
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Patent number: 7023404Abstract: A plasma display panel (PDP) having a priming electrode is disclosed. The PDP has a first substrate and a second substrate, wherein the second substrate is opposite to the first substrate. The space between the first substrate and the second substrate is defined as a discharge space and is filled with a discharge gas. A sustaining electrode, a scanning electrode and a priming electrode are all positioned on the first substrate along a first direction. An address electrode is positioned on the second substrate perpendicularly with the first direction. The priming electrode outputs a first priming pulse so as to excite the discharge gas and to produce a plurality of discharge ions.Type: GrantFiled: December 6, 2002Date of Patent: April 4, 2006Assignee: Au Optronics Corp.Inventor: Jih-Fon Huang
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Patent number: 7015880Abstract: There is provided an address-while-display driving method for a surface discharge type triode plasma display panel, which includes sequentially performing resetting and addressing on each XY-electrode line pair while alternately and consecutively applying display voltages to all XY-electrode line pairs of the panel. The panel includes a front substrate and a rear substrate that are separately formed to face each other, X- and Y-electrode lines that are alternately arranged in parallel between the front and rear substrates to form the XY-electrode line pairs, and address electrode lines that are formed in perpendicular to the X- and Y-electrode lines. The address-while-display driving method includes lowering the display voltages during an addressing time for each XY-electrode line pair.Type: GrantFiled: November 18, 2002Date of Patent: March 21, 2006Assignee: Samsung SDI Co., Ltd.Inventors: Joo-yul Lee, Kyoung-ho Kang
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Patent number: 7012579Abstract: Disclosed is a method of driving a plasma display panel enabling to improve an overall contrast characteristic of the plasma display panel by reducing a voltage difference between scan and sustain electrodes Y and Z to decrease an emission amount of light generated by a discharge between the scan and sustain electrodes Y and Z. The present invention includes a first step of applying a reset pulse to the scan electrode to form predetermined wall charges on the electrodes for a set-up period and a second step of applying a pulse of a predetermined level to the sustain electrode to reduce a voltage difference between the scan and sustain electrodes while the reset pulse is applied.Type: GrantFiled: December 6, 2002Date of Patent: March 14, 2006Assignee: LG Electronics Inc.Inventor: Jeong Pil Choi
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Patent number: 7012580Abstract: A method for driving a plasma display device is provided which is capable of causing writing discharge to normally occur. A sub-field includes an initializing period, a scanning period during which video data to display a video is written in a discharge cell by causing writing discharge to occur between a scanning electrode and a data electrode, and a sustaining period during which sustaining discharge to cause the discharge cell in which a writing discharge has occurred to emit light in a manner to correspond to video data is made to occur between the scanning electrode and a sustaining electrode. The initializing period includes a wall charge adjusting period during which wall charge adjusting discharge to adjust charges accumulated between the scanning electrode and the sustaining electrode is made to occur, a sustaining erasing period, a priming period, and a priming erasing period.Type: GrantFiled: December 18, 2003Date of Patent: March 14, 2006Assignee: Pioneer CorporationInventor: Eishi Mizobata
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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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Patent number: 7009583Abstract: A flat-panel display apparatus having plasma discharge cells forming pixels arranged in a matrix of M row and N columns, wherein N is larger than M. The flat display panel has sustain electrodes and scan electrodes arranged in one direction and data electrodes in a second direction perpendicular to the first direction. A data driver circuit is coupled to the data electrodes for supplying data signals to the discharge cells in response to video information, wherein the data electrodes are arranged to constitute the M rows, the sustain and scan electrodes are arranged to constitute the N columns and the data driver circuit is adapted to supply data signals to a column of selected pixels.Type: GrantFiled: September 13, 2001Date of Patent: March 7, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Antonius Hendricus Maria Holtslag, Harm Tolner, Petrus Antonius Johannes Maria Verscharen
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Patent number: 7009585Abstract: 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: December 31, 2003Date of Patent: March 7, 2006Assignee: Fujitsu LimitedInventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
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Patent number: 7009582Abstract: A PDP driving method that is adaptive for a high-speed driving. In the method, an upper driving signal is applied to supply a data to address electrode lines provided at an upper block. A lower driving signal is applied to supply a data to address electrode lines provided at a lower block in such a manner to overlap with the upper driving signal.Type: GrantFiled: April 18, 2001Date of Patent: March 7, 2006Assignee: LG Electronics Inc.Inventor: Seong Cheol Shin
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Patent number: 7006059Abstract: A multi-gray-scale image display method and apparatus for displaying a multi-gray-scale image on a PDP by diffusing, as an error, a part of gray scale data representing an input image requiring more than a gray scale resolution of the PDP to a target pixel from different adjacent pixels in a scanning direction according to a diffusion factor corresponding to each pixel. A determination is made whether the target pixel to which the error is diffused from the adjacent pixels is positioned in an upper line of the whole image represented by the data. The diffusion factor is set such that it determines the error diffused from an adjacent pixel differently when the target pixel to which the error is diffused from the adjacent pixel is positioned in the upper line of the whole image.Type: GrantFiled: July 1, 2002Date of Patent: February 28, 2006Assignee: Samsung SDI Co., Ltd.Inventor: Im-Su Choi
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Patent number: 7006060Abstract: A display panel has a plurality of first electrodes, a plurality of second electrodes disposed adjacently and alternately with the first electrodes, a plurality of third electrodes formed to cross the first and second electrodes, and a control circuit for carrying out an address discharge during the second electrodes and the third electrodes. The control circuit carries out a sustain discharge to decrease the volume of wall charges, accumulated on a display cell in which a sustain discharge is not intended, to a level which cannot generate a sustain discharge.Type: GrantFiled: December 3, 2001Date of Patent: February 28, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Yoshikazu Kanazawa, Hitoshi Hirakawa, Shigeharu Asao, Shinsuke Tanaka
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Patent number: 6999047Abstract: A method of displaying a video signal (Vs) with m video lines in a video field period on a plasma display panel (1) which has n display lines (Di), includes selecting (2) the n display lines (Di) in an interlaced way to subsequently select a first and a second field of n/2 display lines (Di) to display an interlaced video signal (Vs). For displaying a progressive video signal (Vs), the m video lines are alternately displayed (3) on the first field of display lines (Di) only, or on the second field of display lines (Di) only, both during respective time periods which are longer than the video field period.Type: GrantFiled: March 15, 1999Date of Patent: February 14, 2006Assignee: Koninklijke Philips Electronics N.V.Inventor: Antonius H. M. Holtslag
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Patent number: 6995521Abstract: Two sustain driver circuits are provided: a first sustain driver circuit for both controlling the potential on the scan electrode side and effecting control such that, when the scan electrode side is at the power-supply potential, this potential is used to raise the potential on the sustain electrode side; and a second sustain driver circuit for both controlling the potential on the sustain electrode side and effecting control such that, when the sustain electrode side is at the power-supply potential, this potential is used to raise the potential of the scan electrode side. When the scan electrode side is at the power-supply potential, control is effected such that current flows from the first sustain driver circuit to the second sustain driver circuit by way of a third switching element and first coil, whereby the potential of the scan electrode side falls and the potential of the sustain electrode side rises.Type: GrantFiled: April 16, 2004Date of Patent: February 7, 2006Assignee: Pioneer CorporationInventors: Teruo Okamura, Hiroshi Shirasawa
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Patent number: 6995735Abstract: A method for driving an AC plasma display panel which makes it possible to reduce flicker in display and have stable and high luminance. In a first step, a wall charge of same amount is produced both in an X electrode 22 and a Y electrode 23 by writing discharge during a scanning period. At this time, the amount of the wall charge is adjusted depending on gray scale to be displayed. In a second step, during a sustaining period, a timing of a start of the sustaining discharge is changed by changing a sustaining start control voltage as a voltage of a data electrode. Gradation sequence are displayed through the above steps.Type: GrantFiled: June 1, 2001Date of Patent: February 7, 2006Assignee: NEC CorporationInventor: Eishi Mizobata
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Patent number: 6992646Abstract: A plasma display panel including a first substrate carrying thereon a plurality of strip-shaped ribs arranged parallel to each other, a fluorescent material applied between adjacent ribs and a plurality of address electrodes arranged parallel to the ribs and a second substrate being arranged to oppose to the first substrate and carrying thereon a plurality of sustain electrodes arranged in a direction crossing the address electrodes, wherein each of the address electrodes between adjacent ribs includes a plurality of branch electrodes which are diverged through almost the whole length of the ribs.Type: GrantFiled: March 20, 2003Date of Patent: January 31, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Noriaki Setoguchi, Seiki Kurogi
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Patent number: 6982685Abstract: A method for driving a gas electric discharge device which has a first electrode and a second electrode and is constructed such that a wall voltage is capable of being produced between the first and second electrodes. The method includes applying a voltage monotonously rising from a first set value to a second set value, between the first and second electrodes, thereby to generate a plurality of gas electric discharges so as to decrease the wall voltage for charge adjustment during the voltage rise.Type: GrantFiled: July 5, 2002Date of Patent: January 3, 2006Assignee: Fujitsu LimitedInventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
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Patent number: 6980179Abstract: A display device is provided in which the number of gradation levels in a display is increased without increasing the number of terminals of a driving device. A display block of one pixel in an image display screen including a plurality of cells are provided with M (two or more) cells having the same light color, and the structures of these cells are made different partially from each other, so that (M+1) types of light emission quantity control including non-light emission can be performed.Type: GrantFiled: February 11, 2003Date of Patent: December 27, 2005Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Norio Yatsuda, Takashi Sasaki
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Patent number: 6980178Abstract: A method of driving a plasma display panel that is adaptive for improving brightness and efficiency. In the method, a sustaining pulse for sustaining a discharge of a cell selected in a sustaining interval is alternately applied to each of a sustaining electrode pair. A pulse signal synchronized with the sustaining pulse is applied to a data electrode to cause a discharge for inducing a long-path discharge between the sustaining electrode pair between any one of the sustaining electrode pair and the data electrode.Type: GrantFiled: September 7, 2001Date of Patent: December 27, 2005Assignee: LG Electronics Inc.Inventors: Jae Hong Lee, Young Kyo Shin, Eun Cheol Lee, Sung Yong Ahn
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Patent number: 6977633Abstract: An alternating current (AC) plasma display panel is provided that emits little electromagnetic waves and which has no brightness irregularity. In this panel, pairs of scan electrodes and sustain electrodes are provided in rows, and data electrodes arranged orthogonally to the pairs of scan electrodes and sustain electrodes constitute a matrix. A conductor is disposed in each row in parallel with the scan electrodes and the sustain electrodes. The scan electrodes are coupled with a scan electrode driving circuit on the left side of the panel. The conductors are electrically coupled with the sustain electrodes on the right side of the panel and are connected with a sustain electrode driving circuit on the left side of the panel. When a sustain pulse voltage is applied, a current runs through the conductors in a direction reverse to a direction of the sustaining discharge current running through the scan electrodes and the sustain electrodes.Type: GrantFiled: October 26, 2000Date of Patent: December 20, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Taichi Shino, Takio Okamoto
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Patent number: 6967636Abstract: The object of the invention is to provide a method for driving a plasma display panel that provides an improved expression of levels of halftone as well as an improved display quality. In N sub-fields constituting a display period of one field, when a pixel data writing step for setting discharge cells to either one of non-light-emitting cells or light-emitting cells in response to pixel data and a light-emission sustaining step for allowing only the aforementioned light-emitting cells to emit light only during a light-emission period corresponding to weights assigned to the sub-fields respectively are executed, the light-emission period in the light-emission sustaining step of the respective sub-fields is changed field by field or frame by frame. According to another aspect, the invention allows for carrying out selectively a first drive pattern or a second drive pattern.Type: GrantFiled: July 24, 2003Date of Patent: November 22, 2005Assignee: Pioneer CorporationInventors: Tetsuya Shigeta, Hitoshi Mochizuki, Masahiro Suzuki, Nobuhiko Saegusa
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Patent number: 6965359Abstract: Method for driving a plasma display panel. At least one first discharge sustaining pulse is applied to a first pair of display electrodes, and at least one second discharge sustaining pulse applied to an adjacent pair of display electrodes. The first and second discharge sustaining pulses are applied such that they are in the same phase as one another and/or such that a current in the first pair of display electrodes flows in the opposite direction from a current in the adjacent pair of display electrodes.Type: GrantFiled: September 28, 2001Date of Patent: November 15, 2005Assignee: Fujitsu LimitedInventors: Tomoyuki Ishii, Tadatsugu Hirose, Yoshikazu Kanazawa, Toshio Ueda, Tomokatsu Kishi, Shigetoshi Tomio, Fumitaka Asami
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Patent number: 6956546Abstract: Row electrodes Xi (i=1 to n) are arranged over portions close to right and left ends of a PDP, and column electrodes Wj (j=1 to m) are arranged over portions close to upper and lower ends thereof to grade-separately intersect with the row electrodes Xi. The column electrodes Wj and Wm+1?j are connected in common. Row electrodes YL1 to YLn extending over a portion close to the left end and a portion close to the center and row electrodes YR1 to YRn extending over a portion close to the right end and a portion close to the center are arranged alternately with row electrodes X1 to Xn. A scan pulse Vax1 is successively applied to the row electrodes Xi and a voltage Vaw1 based on image data is applied to each column electrode Wj in synchronization with the application of the pulse Vax1 in a first address period. In this period, a subscan pulse Vay1 is applied to the row electrodes YL1 to YLn while the row electrodes YR1 to YRn are set to a ground potential.Type: GrantFiled: October 10, 2000Date of Patent: October 18, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takashi Hashimoto, Yasutaka Inanaga
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Patent number: 6954188Abstract: A PDP driving method that reduces the reset voltage of the PDP driving waveforms to make it possible to use low-voltage elements and to achieve high contrasts is disclosed. Since conventional PDP waveforms require very high reset voltages, it causes a problem of intense background light emissions, low contrasts, use of high-voltage components, and increased circuit costs. According to the driving waveforms of the present invention, relative voltage differences between the address electrode and the X electrode and between the X electrode and the Y electrode are considered to design waveforms of low reset voltages, thereby providing high contrasts and low-cost circuit.Type: GrantFiled: July 23, 2002Date of Patent: October 11, 2005Assignee: Samsung SDI Co., Ltd.Inventors: Jeong-Hyun Seo, Joo-Yul Lee, Tae-Hyun Kim, Hee-Hwan Kim, Min-Sun Yoo
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Patent number: 6927751Abstract: A plasma display apparatus which can surely prevent an overcurrent flowing in a driver for driving electrodes of a plasma display panel. A power source is shut off when an internal short-circuit state of a column electrode driver is detected based on a current or an electric potential on a power line in a column electrode driver detected during a light emission sustaining period.Type: GrantFiled: May 22, 2002Date of Patent: August 9, 2005Assignees: Pioneer Corporation, Shizuoka Pioneer CorporationInventors: Shigeo Ide, Takashi Iwami
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Patent number: 6914585Abstract: A method for driving a plasma display panel is provided in which initialization is performed securely and the background light emission is reduced. As an operation for the initialization, an obtuse waveform pulse is applied to all cells three times. In the first obtuse waveform pulse application, discharge is generated only in the previously lighted cell, so that the wall voltage thereof approaches the wall voltage in the previously unlighted cell. In the second obtuse waveform pulse application, discharge is generated in the previously lighted cell and in the previously unlighted cell, so that the wall voltage in these cells changes to a value within an appropriate range. In the third obtuse waveform pulse application, discharge is generated in the previously lighted cell and in the previously unlighted cell, so that the wall voltage of these cells changes to a preset value.Type: GrantFiled: January 16, 2003Date of Patent: July 5, 2005Assignee: Fujitsu LimitedInventor: Koichi Sakita
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Patent number: 6911783Abstract: The object of the invention is to provide a driving method and a driving apparatus for PDPs (Plasma Display Panels) which make it possible to inhibit error address discharges that may occur in a PDP in which a plurality of pairs of display electrodes, each made up of a scan electrode and a sustain electrode, are disposed in stripes, and the sustain electrodes from different cells are positioned adjacent to each other due to the fact that, in some of the cells, the scan electrode and the sustain electrode are disposed in a different order than in other cells.Type: GrantFiled: October 24, 2001Date of Patent: June 28, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Kunihiro Mima
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Patent number: 6906689Abstract: A plasma display panel that is adaptive for improving discharge efficiency. In the panel, a plurality of the first and second electrodes are provided at the rear side of an upper substrate. A dielectric layer is provided at the rear side of the upper substrate in such a manner to cover the upper substrate and the first and second electrodes. A plurality of the first and second auxiliary electrodes are provided in parallel to the first and second electrodes within the dielectric layer.Type: GrantFiled: April 15, 2002Date of Patent: June 14, 2005Assignee: LG Electronics Inc.Inventors: Jae Koo Lee, Hyun Chul Kim, Sung Soo Yang, Young Kyo Shin
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Patent number: 6903711Abstract: In a driving method for driving a plasma display panel, achieving improvements on luminous efficiency, brightness and contrast, as well as, low voltage and low power consumption, and also high-speed addressing and sustain therewith, wherein onto a second display electrode is applied pulse voltage in reverse polarity with sustain pulse voltage, nearly in synchronism with the sustain pulse voltage to be applied onto a first display electrode, thereby shifting initial discharge (or, pre-charge) caused between the first display electrode and a metal electrode of a partition portion after the generation thereof into display discharge, thereby forming wall charge and wall voltage on the second display electrode.Type: GrantFiled: February 19, 2002Date of Patent: June 7, 2005Assignee: Hitachi, Ltd.Inventor: Yutaka Akiba
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Patent number: 6900780Abstract: According to the present invention, in a plasma display discharge tube in which a plurality of stripe-like anode electrodes (11) and a plurality of stripe-like cathode electrodes (9) are arranged at a predetermined interval to be crossed each other, to thereby constitute an X-Y matrix electrode with a space at each of the crossing portions thereof as a pixel and a plurality of pixels are selectively excited according to an image to display an image, there is provided a plasma display discharge tube in which there are provided an AC type memory electrode (1) arranged opposite to the X-Y matrix electrode (9) and (11) common to all the pixels, and an AC type auxiliary electrode (5) in contact with the AC type memory electrode (1) through an insulating layer and supplying an electric power through a coupling capacitor formed between the same and the AC type memory electrode (1), wherein a memory discharge display is performed between the X-Y matrix electrode (9) and (11) and the AC type memory electrode (1).Type: GrantFiled: September 18, 1997Date of Patent: May 31, 2005Assignee: Technology Trade and Transfer CorporationInventor: Yoshifumi Amano
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Patent number: 6897834Abstract: In the matrix display drive circuit with an energy recovery inductor (L1), a switch circuit (S3, D3, S6, d9) is connected in parallel with the inductor (L1) to keep the inductor current (TL1) in a loop which is as small as possible, and to keep the voltage (VL1) across the inductor (L1) as low as possible. Consequently, the energy stored in the inductor is lower, and the EM1 caused by the parasitic resonance of the inductor (L1) with parasitic capacitances Cj will be significantly lower.Type: GrantFiled: August 17, 2001Date of Patent: May 24, 2005Assignee: Koninklijke Philips Electronics N.V.Inventor: James Joseph Anthony McCormack
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Patent number: 6894672Abstract: Compensation, e.g. temperature compensation of the operating voltage of an LCD is obtained by using the V50 point of a test cell via the differentiated AC current (switching current of the test cell as a control parameter).Type: GrantFiled: March 8, 2001Date of Patent: May 17, 2005Assignee: Koninklijke Philips Electronics N.V.Inventor: Adolphe Johannes Gerardus Ruigt
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Patent number: 6888517Abstract: A video display driver circuit adapted to receive and monitor an input video signal, which is associated with information or an image that is subsequently displayed on a display. The video display driver circuit includes circuitry for detecting movement of the information or image displayed on the display and circuitry for adjusting a vertical synchronization frequency associated with the display to enable the moving information or image to be smoothly reproduced in a number of locations on the display.Type: GrantFiled: May 22, 2001Date of Patent: May 3, 2005Assignee: Pioneer Plasma Display CorporationInventor: Yoshihiko Ikemoto
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Patent number: 6882328Abstract: An AC-type plasma display panel and a method for driving the AC-type plasma display panel are provided which are capable of reducing discharge leak (crosstalk) between cells being adjacent to each other and of increasing operating range. The AC-type plasma display panel has two insulating substrates both facing each other. On one insulating substrate is formed a plurality of scanning electrodes and a plurality of sustaining electrodes. On another insulating substrate is formed a plurality of data electrodes. Each of the scanning electrodes is made up of each of bus electrodes and each of main discharge electrodes.Type: GrantFiled: December 27, 2002Date of Patent: April 19, 2005Assignee: NEC Plasma Display CorporationInventor: Kota Araki
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Patent number: 6882327Abstract: The number of X electrodes of a PDP to be driven is m, the number of Y electrodes of the same is m+1, and they are alternately disposed at equal intervals. The intersections (2m?1) between all the X electrodes and Y electrodes and the data electrodes (n) form each cell, and a total of (2m?1)×n pixels exist. Wall charges with the same polarity and the same amount are formed on the X electrode and Y electrode within one cell while surface discharge occurs between the X electrode and Y electrode, and lighting and non-lighting is distinguished based on the wall charge amount. The surface discharge is set so as not to occur when either the X electrodes or Y electrodes only change their voltages.Type: GrantFiled: December 21, 2001Date of Patent: April 19, 2005Assignee: Pioneer Plasma Display CorporationInventor: Eishi Mizobata
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Patent number: 6876343Abstract: Method for driving a plasma display panel, wherein a pulse of ramp-down waveform is applied to scan electrode lines between a sustain period of a last selective write sub-field and an address period of a first selective erase sub-field continuous thereto, or between the sustain period of a preceding selective erase sub-field and the address period of a next selective erase sub-field continuous thereto after the first selective erase sub-field, whereby causing more stable address discharge at a higher sustain voltage, or a lower selective erase scan voltage.Type: GrantFiled: November 26, 2002Date of Patent: April 5, 2005Assignee: LG Electronics Inc.Inventors: DaeJin Myoung, Tae Hyung Kim, Dai Hyun Kim, Jong Woon Kwak, Geun Soo Lim