Fluid Light Emitter (e.g., Gas, Liquid, Or Plasma) Patents (Class 345/60)
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Patent number: 7999763Abstract: A plasma display apparatus is disclosed. In the plasma display apparatus, a data signal includes a voltage rising period during which the data signal gradually rises to a first voltage using an inductor, a voltage maintaining period during which the data signal is maintained at a second voltage higher than the first voltage, and a voltage falling period during which the data signal gradually falls to a voltage equal to or less than the second voltage. A magnitude of the first voltage is equal to or more than one half of a magnitude of the second voltage, and is less than the magnitude of the second voltage. A current flowing in the inductor ranges from zero ampere to a maximum current value of the inductor at a time when a voltage of the data signal is equal to the first voltage.Type: GrantFiled: January 12, 2007Date of Patent: August 16, 2011Assignee: LG Electronics Inc.Inventors: Jung Gwan Han, Bong Sup Jung, Chi Yun Ok, Hyun Lark Do
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Patent number: 7999766Abstract: A driving method and a driver circuit for improving the definition of display image on a plasma display device. In an initial state in an addressing discharge period, a scanning electrode is applied with a scanning base pulse at a first power supply potential. This suppresses a weak erroneous discharge between a scanning base pulse and a display data pulse. Next, the scanning electrode is applied with a scanning pulse. After the scanning pulse has been applied, the scanning electrode is applied with the scanning base pulse at a second power supply potential. In this way, the level of the scanning base pulse applied to the scanning electrode after the end of the application of the scanning pulse in the addressing discharge period is lower than the level of the scanning base pulse applied to the scanning electrode before the application of the scanning pulse.Type: GrantFiled: February 14, 2008Date of Patent: August 16, 2011Assignee: Panasonic CorporationInventors: Sohei Okamoto, Takatoshi Shoji, Hiroshi Shirasawa
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Patent number: 7999765Abstract: The present invention relates to a plasma display panel, and more specifically, a method and an apparatus for driving a plasma display panel.Type: GrantFiled: November 13, 2007Date of Patent: August 16, 2011Assignee: LG Electronics Inc.Inventors: Oe Dong Kim, Jung Hun Kim
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Patent number: 7999762Abstract: The present invention relates to a plasma display apparatus and driving method of the same. Since wall charges are remained without performing an additional erasing discharge after the sustain period is terminated and before the initiation of the reset period, the set up discharge can be generated with a small voltage during the reset period to obtain the margin of the driving voltage. In particular, since the highest voltage of the reset period during other subfields is lower than the highest voltage of the reset period of a subfield implementing a low gray scale, with inducing the half discharge before the set up discharge in other subfields, the set up discharge can be generated with a low voltage to improve the contrast due to the luminous output reduction.Type: GrantFiled: September 27, 2006Date of Patent: August 16, 2011Assignee: LG Electronics Inc.Inventors: Moon Shick Chung, Young Seop Moon, Chang Young Kwon
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Patent number: 7999761Abstract: A plasma display apparatus and a driving method of thereof are provided. The plasma display apparatus comprises a plasma display panel comprising a plurality of first address electrodes and a plurality of second address electrodes, and a data driver for supplying a voltage of a substantially equal magnitude to a last first address electrode of at least one side of the plurality of first address electrodes and at least one second address electrode.Type: GrantFiled: May 22, 2006Date of Patent: August 16, 2011Assignee: LG Electronics Inc.Inventors: Sonic Kim, Jung Gwan Ilan, An Soo Kim
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Patent number: 7995005Abstract: The present invention relates to a plasma display panel, and more specifically, a method and an apparatus for driving a plasma display panel.Type: GrantFiled: November 13, 2007Date of Patent: August 9, 2011Assignee: LG Electronics Inc.Inventors: Oe Dong Kim, Jung Hun Kim
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Patent number: 7995006Abstract: One field is formed of a plurality of sub-fields, and each one of the sub-fields includes an initializing period, addressing period, and sustained period. The sub-field is one of an entire-cell initialization sub-field or a selective-cell initialization sub-field. When the entire initialization sub-field is switched to the selective one or vice versa, an initializing voltage which generates initializing discharge in the entire initialization sub-field is controlled. This control allows varying the number of the entire initializations and stabilizing address discharge in a plasma display panel, and at the same time, making the black luminance inconspicuous for improving the picture quality.Type: GrantFiled: February 13, 2007Date of Patent: August 9, 2011Assignee: Panasonic CorporationInventors: Minoru Takeda, Shigeo Kigo, Yasuaki Mutou
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Patent number: 7990342Abstract: The present invention provides an image display method that allows displaying a full range of gradation levels while reducing dynamic false contours. In this method, emission pattern information generation circuit in image display device that displays gradation by dividing a single field into a plurality of subfields and combining an emitted state and a non-emitted state for each subfield, generates plural pieces of emission pattern information so that an average emission rate becomes a given value or greater for any subfield with its brightness weight smaller than the maximum brightness weight of the subfield where its average emission rate is not zero. Further, dither generation circuit in image display device performs a time-averaging process and a space-averaging process for the plurality of pieces of emission pattern information.Type: GrantFiled: October 1, 2004Date of Patent: August 2, 2011Assignee: Panasonic CorporationInventor: Kazuhiro Yamada
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Patent number: 7990345Abstract: A plasma display panel and a drive method therefor, which can enhance a representation capability when displaying a dark image. The plasma display panel includes fluorophor layers containing magnesium oxide. The drive method includes a reset step to initialize all the pixel cells into states of one of a light-up mode and a light-off mode, and an address step in which the pixel cells are caused to perform address discharges selectively in accordance with pixel data, which are successively executed in each of a head subfield and a second subfield within a one-field display period. In reset step, a voltage that sets row electrodes on one side, in the row electrode pairs as an anode and sets the column electrodes set as a cathode is applied between the row electrodes on the one side and the column electrodes.Type: GrantFiled: September 10, 2007Date of Patent: August 2, 2011Assignee: Panasonic CorporationInventors: Shunsuke Itakura, Atsushi Hirota, Hai Lin, Tsutomu Tokunaga
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Patent number: 7990344Abstract: A plasma display panel driving method and a plasma display device estimate the highest temperature and the lowest temperature the panel can have, according to the temperature detected by the thermal sensor, and appropriately drives the panel, to improve the image display quality. Provided are at least three driving modes having different sub-field structures: a low-temperature driving mode, an ordinary-temperature driving mode, and a high-temperature driving mode. To drive the panel, estimates of the highest temperature and the lowest temperature the panel can have are made from the temperature detected by the thermal sensor, the temperature condition of the panel is determined from the estimated highest temperature or lowest temperature, and the driving mode is switched appropriately for the panel temperature condition.Type: GrantFiled: February 13, 2007Date of Patent: August 2, 2011Assignee: Panasonic CorporationInventors: Toshiyuki Maeda, Shigeo Kigo, Yoshiki Tsujita, Naoyuki Tomioka, Takeru Yamashita, Kei Kitatani
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Patent number: 7990340Abstract: The present invention relates to a plasma display apparatus including a sustain driving apparatus that supplies a sustain signal to a panel. The plasma display apparatus includes a panel in which a front substrate having formed first and second electrodes therein and a rear substrate are coalesced, a sustain driver including a first switch for applying a first voltage to any one of the first and second electrodes and a second switch for applying a second voltage, and a circuit protection unit that controls one of the first and second switches, which has a voltage higher than a predetermined voltage, at its both ends, not to turn on. According to the present invention, when a voltage at both ends of the switch included in the sustain driving apparatus in order to supply the sustain signal is higher than a reference voltage, the switch is controlled not to turn on.Type: GrantFiled: November 8, 2006Date of Patent: August 2, 2011Assignee: LG Electronics Inc.Inventors: Hyun Il Park, Chang Young Kwon, Yun Kwon Jung, Jong Sik Lim, Kyu Choon Cho, Yang Ki An
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Patent number: 7990341Abstract: A technique which enables improvement of luminance and reduction of consumption power in a sustain discharge driving of a four-electrode structure PDP, particularly, by devising driving method to Z electrodes. In this plasma display device, a sustain discharge by a method to apply a narrow pulse to the Z electrode and a method to apply a fixed potential to the Z electrode are switched according to a judgment of range of display load ratio in driving sustain discharge from a controller and driver to the PDP and used.Type: GrantFiled: July 26, 2005Date of Patent: August 2, 2011Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Naoki Itokawa, Tetsuya Sakamoto, Takayuki Kobayashi, Tomokatsu Kishi, Yasunobu Hashimoto
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Publication number: 20110181499Abstract: A light-emitting display device partition wall of the present invention contains at least one element selected from the group consisting of Mg, Ca, Ba, Sr, Y, La, Ce, Eu and Yb, and a concentration of the at least one element is higher on the surface side of the partition wall than on the inner portion side of the partition wall.Type: ApplicationFiled: November 9, 2009Publication date: July 28, 2011Inventor: Iwao Ueno
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Patent number: 7986316Abstract: The invention relates to a method for power level control of a display device and an apparatus for carrying out the method. Classically, a power level mode defining a subfield organization to be used for subfield coding is selected as a function of the average power level of the picture to be displayed for keeping constant the power consumption of the display device. According to the invention, it is proposed to select the power level mode as a function of the input frame frequency in such a way as to have as little as possible deviations from nominal peak white and full white values at the same time that an overloading of the panel power supply is prevented. More particularly, the number of sustain pulses within the video frame and selected by the power level mode is modified as a function of the input frame frequency.Type: GrantFiled: November 8, 2006Date of Patent: July 26, 2011Assignee: Thomson LicensingInventors: Carlos Correa, Cédric Thebault, Rainer Zwing
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Patent number: 7986284Abstract: A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plasma display panel including an address electrode and a data driver. The data driver supplies a rising signal gradually rising from a first voltage to a second voltage during a first sustain period and a falling signal gradually falling from the second voltage to a third voltage during a second sustain period following the first sustain period to the address electrode.Type: GrantFiled: October 12, 2007Date of Patent: July 26, 2011Assignee: LG Electronics Inc.Inventor: Youngseop Moon
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Publication number: 20110175891Abstract: A plasma display apparatus includes a plasma display panel including plural scanning electrodes extending in a first direction and plural address electrodes extending in a second direction crossing the first direction, an address driver to drive the address electrodes, a power recovery circuit including an inductor and a capacitor, and a switch provided in the address driver to switch connection and disconnection between the address electrodes and the power recovery circuit.Type: ApplicationFiled: September 10, 2008Publication date: July 21, 2011Inventors: Isao Furukawa, Yasunobu Hashimoto, Koichi Sakita
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Publication number: 20110175889Abstract: This disclosure relates to a method for driving an AC type plasma display panel. According to this disclosure, an elapse time period between an end time point of ramp-down and a time when a first scan pulse is applied is maintained to be uniform even when a ramp-down slope is different in such a manner that a comparator of a scan electrode driving circuit compares an output voltage with a reference voltage and a logic control circuit outputs a control signal to a logic control circuit when the output voltage is equal to the reference voltage. Accordingly, the method for driving the AC type plasma display panel is capable of improving an address characteristic and a driving margin.Type: ApplicationFiled: September 30, 2009Publication date: July 21, 2011Inventors: Hwan Woo Lee, Gap Sik Park
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Publication number: 20110175887Abstract: A display screen is controlled through successive scans of the display screen. Each scan of the display screen includes a successive selection of rows of the display screen. For each row selected, and in accordance with a normal selection, a first column selection mode is implemented wherein a first selection signal is generated for the column, that first selection signal going from a first state towards a second state with an intermediate plateau level being reached therebetween. In an alternative operation, a second column selection mode is provided which replaces the first column selection mode, the second column selection mode including the generation of a second selection signal going from the first state to the second state without any intermediate plateau level being reached therebetween.Type: ApplicationFiled: March 31, 2011Publication date: July 21, 2011Applicant: STMICROELECTRONICS, S.A.Inventors: Jean-Raphaël Bexal, Jérôme Bourgoin
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Publication number: 20110175851Abstract: An electronic pen for detecting a touch location, a controlling method of the same and a driving method of a plasma display apparatus are disclosed. According to embodiments of the present invention, synchronization between the electronic pen and the plasma display apparatus may be performed. An electronic pen includes a sensor for receiving infrared emissions and for generating a plurality of sensing signals in response to the infrared emissions, a synchronization unit for determining a synchronization timing in accordance with timings of the plurality of sensing signals, and a coordinate detection unit for detecting an emission location of the infrared emissions in accordance with time differences between the synchronization timing and the timings of the plurality of sensing signals.Type: ApplicationFiled: August 4, 2010Publication date: July 21, 2011Inventors: Hyun-Chul Do, Im-Su Choi, Young-Sun Kim
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Patent number: 7982730Abstract: The invention relates to a new method for power level control of a display device and an apparatus for carrying out the method. Classically, the contrast/brightness control and the power management (based on an average power level control) are made independently. These two controls can be contradictory. According to the invention, the power level mode and more particularly the number of sustain pulses within the video frame is selected as a function of the average power level (APL) of the picture to be displayed and the picture control signal representing the desired contrast and/or brightness value.Type: GrantFiled: November 7, 2006Date of Patent: July 19, 2011Assignee: Thomson LicensingInventors: Carlos Correa, Cédric Thebault, Rainer Zwing
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Publication number: 20110169876Abstract: A plasma display panel and a drive method therefor, which can enhance a representation capability when displaying a dark image. The plasma display panel includes fluorophor layers containing magnesium oxide. The drive method includes a reset step to initialize all the pixel cells into states of one of a light-up mode and a light-off mode, and an address step in which the pixel cells are caused to perform address discharges selectively in accordance with pixel data, which are successively executed in each of a head subfield and a second subfield within a one-field display period. In reset step, a voltage that sets row electrodes on one side, in the row electrode pairs as an anode and sets the column electrodes set as a cathode is applied between the row electrodes on the one side and the column electrodes.Type: ApplicationFiled: February 25, 2011Publication date: July 14, 2011Applicant: PANASONIC CORPORATIONInventors: Shunsuke ITAKURA, Atsushi HIROTA, Hai LIN, Tsutomu TOKUNAGA
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Publication number: 20110169716Abstract: A plasma display panel and a multi plasma display panel are disclosed. The multi plasma display panel includes a plurality of plasma display panels that are positioned adjacent to one another. Each of the plurality of plasma display panels includes a front substrate, a back substrate positioned opposite the front substrate, and a plurality of barrier ribs positioned between the front substrate and the back substrate. The plurality of barrier ribs partition a plurality of discharge cells. A size of a discharge cell in a boundary portion between two plasma display panels of the plurality of plasma display panels is greater than a size of a discharge cell in other portions.Type: ApplicationFiled: January 6, 2011Publication date: July 14, 2011Inventors: Kyungtae KIM, Seungmun SHIN, Youngjoon AHN
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Publication number: 20110169811Abstract: A sustain pulse generating circuit has a power recovery circuit and an auxiliary circuit. The power recovery circuit has an inductor with a first coil, a second coil, and a third coil, and a capacitor. The auxiliary circuit has a first auxiliary switch and a second auxiliary switch. The sustain pulse generating circuit energizes the first auxiliary switch and stores energy in a forward direction to the first coil immediately before the sustain pulse rise. Immediately before the sustain pulse falls, the sustain pulse generating circuit energizes the second auxiliary switch and stores energy in a reverse direction to the second coil. When the sustain pulse rises and falls, the current flowing between the power recovery circuit and the capacitive load is the current produced by LC resonance plus the current produced by the energy previously stored in the recovery inductor.Type: ApplicationFiled: April 15, 2009Publication date: July 14, 2011Applicant: Panasonic CorporationInventor: Toshikazu Nagaki
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Publication number: 20110169875Abstract: A plasma display panel and a drive method therefor, which can enhance a representation capability when displaying a dark image. The plasma display panel includes fluorophor layers containing magnesium oxide. The drive method includes a reset step to initialize all the pixel cells into states of one of a light-up mode and a light-off mode, and an address step in which the pixel cells are caused to perform address discharges selectively in accordance with pixel data, which are successively executed in each of a head subfield and a second subfield within a one-field display period. In reset step, a voltage that sets row electrodes on one side, in the row electrode pairs as an anode and sets the column electrodes set as a cathode is applied between the row electrodes on the one side and the column electrodes.Type: ApplicationFiled: February 25, 2011Publication date: July 14, 2011Applicant: PANASONIC CORPORATIONInventors: Shunsuke ITAKURA, Atsushi HIROTA, Hai LIN, Tsutomu TOKUNAGA
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Publication number: 20110169807Abstract: A plasma display panel and a drive method therefor, which can enhance a representation capability when displaying a dark image. The plasma display panel includes fluorophor layers containing magnesium oxide. The drive method includes a reset step to initialize all the pixel cells into states of one of a light-up mode and a light-off mode, and an address step in which the pixel cells are caused to perform address discharges selectively in accordance with pixel data, which are successively executed in each of a head subfield and a second subfield within a one-field display period. In reset step, a voltage that sets row electrodes on one side, in the row electrode pairs as an anode and sets the column electrodes set as a cathode is applied between the row electrodes on the one side and the column electrodes.Type: ApplicationFiled: February 25, 2011Publication date: July 14, 2011Applicant: PANASONIC CORPORATIONInventors: Shunsuke ITAKURA, Atsushi HIROTA, Hai LIN, Tsutomu TOKUNAGA
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Patent number: 7978154Abstract: An AC or DC gas discharge plasma display panel (PDP) device having one or more substrates and a multiplicity of pixels or sub-pixels that are defined by a hollow plasma-shell filled with an ionizable gas. The plasma-shell is illustrated with reference to a plasma-dome, but other plasma-shell shapes may be used including plasma-disc and plasma-sphere. A plasma-dome has at least one domed or round side and one opposing flat side such as a dome top and flat bottom or vice versa. One or more other sides or edges may also be flat or non-flat. Two or more addressing electrodes are in electrical contact with each plasma-dome, at least one electrode being in electrical contact with a side or end of the plasma-dome that is not flat. The electrical contact may include a conductive pad in electrical contact with the electrode and/or the plasma-dome.Type: GrantFiled: February 5, 2007Date of Patent: July 12, 2011Assignee: Imaging Systems Technology, Inc.Inventors: Oliver M. Strbik, III, Daniel K. Wedding, Carol Ann Wedding
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Patent number: 7978153Abstract: The plasma display device includes connecting means for connecting the X/Y electrodes of the plasma display panel and the X/Y electrode drive circuits. In the X electrode pattern and the Y electrode pattern on the printed board in the connecting means, a current path connecting the center electrodes of the plasma display panel and the X electrode drive circuit or Y electrode drive circuit is longer than a current path connecting the peripheral electrodes and the X electrode drive circuit or Y electrode drive circuit. The current paths at the plasma display panel side are in the U-shape folded in the upper part and the lower part in the periphery of the plasma display panel, respectively. Also, the current paths are first connected to the upper or lower electrodes, and then sequentially connected to the center electrodes via the upper part and the lower part.Type: GrantFiled: May 5, 2006Date of Patent: July 12, 2011Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Sojiro Hagihara, Akihiro Machida, Hidenori Ohnuki, Hideaki Ohki
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Publication number: 20110164074Abstract: An electronic display apparatus comprising a control device and an electronic display panel that can be turned off by the control device. In order to support an energy-saving state in which information can continue to be displayed at least to a certain extent, an electrochromic display is additionally provided that is switchable into different display states by the control device. The invention furthermore relates to an installation appertaining to automation technology, and to a method for operating an electronic display apparatus.Type: ApplicationFiled: August 28, 2008Publication date: July 7, 2011Applicant: Siemens AktiengesellschaftInventors: Edgar Frank, Benjamin Kohler, Jörg Middel, Wolfgang Riedl, Christian Strömsdörfer, Frank Volkmann, Sabastian Wittig
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Patent number: 7973741Abstract: When a discharge start voltage takes a normal value under the normal temperature, priming discharge starts at a time t1. In this case, at a time t3 that is later than the time t1 by a predetermined time t, a sustain driver control signal Ssud2 is raised to put a sustain electrode into the floating state to stop the priming discharge. When the discharge start voltage takes a higher value than usual under the high temperature, the priming discharge starts at a time t2. In this case, at a time t4 that is later than the time t2 by the predetermined time t, the sustain driver control signal Ssud2 is lowered to put the sustain electrode into the floating state to stop the priming discharge. With such a configuration, provided is a plasma display device capable of implementing excellent and stable display quality while maintaining constant, even if a discharge start voltage varies, the charge state in display cells after a priming period, and a drive method for such a plasma display device.Type: GrantFiled: May 28, 2008Date of Patent: July 5, 2011Assignee: Panasonic CorporationInventors: Shinya Tsuchida, Shinji Hirakawa, Mitsuhiro Ishizuka, Koji Hashimoto, Hajime Homma
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Publication number: 20110157139Abstract: A driver circuit for use in a plasma display panel includes a scan electrode driver circuit including one scan electrode side sustaining pulse generator circuit, where a plurality of display electrode pairs is divided into a plurality of display electrode pair groups. The one scan electrode side sustaining pulse generator circuit generates a sustaining pulse to scan electrodes belonging to an arbitrary display electrode pair group, and a scan pulse generator circuit is provided for each of the plurality of display electrode pair groups, and generates a scan pulse applied to the scan electrodes belonging to the corresponding display electrode pair group. A scan electrode side switch circuit is provided for each of the scan pulse generator circuits, and achieves electrical separation or connection between the corresponding scan pulse generator circuit and the scan electrode side sustaining pulse generator circuit.Type: ApplicationFiled: July 7, 2010Publication date: June 30, 2011Inventor: Hideki Nakata
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Publication number: 20110157258Abstract: A stable address discharge is caused to enhance the image display quality. For this purpose, a plasma display panel, a scan electrode driving circuit, and a partial light-emitting rate detecting circuit are provided. The scan electrode driving circuit performs an address operation by applying a scan pulse to scan electrodes in address periods. The partial light-emitting rate detecting circuit divides the display area of the plasma display panel into a plurality of regions, and detects a rate of the number of discharge cells to be lit with respect to the number of all the discharge cells in each region, as a partial light-emitting rate, in each subfield. In a predetermined subfield where the number of sustain pulses is smaller than the number of sustain pulses in the immediately preceding subfield, the scan electrode driving circuit changes the order of applying the scan pulse to the scan electrodes, according to the partial light-emitting rates in the immediately preceding subfield.Type: ApplicationFiled: June 3, 2009Publication date: June 30, 2011Applicant: Panasonic CorporationInventors: Takahiko Origuchi, Hidehiko Shoji, Tomoyuki Saito
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Patent number: 7969387Abstract: In the method for driving a plasma display device, the plasma display panel are applied with voltage through the following process. In the first address period where an address discharge is generated on the scan electrodes that belong to the first scan electrode group, the third switching element is turned OFF so as to give a different value of reference voltage between the first and the second scan electrode driving sections. In the second address period where an address discharge is generated on the scan electrodes that belong to the second scan electrode group, the third switching element is turned ON so as to give a same value of reference voltage between the first and the second scan electrode driving sections. In the sustain period where sustain pulses are applied to a plurality of scan electrodes to generate a sustain discharge in the discharge cells, the third switching element is turned ON.Type: GrantFiled: April 14, 2008Date of Patent: June 28, 2011Assignee: Panasonic CorporationInventor: Nobuhiko Nakamura
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Patent number: 7969386Abstract: A plasma display apparatus and a method of driving the plasma display apparatus are provided. The plasma display apparatus includes a plasma display panel including a first electrode and a second electrode, a first electrode driver, and a second electrode driver. The first electrode driver supplies a first falling signal of a voltage magnitude, that is more than a voltage magnitude of a scan signal supplied during an address period, to the first electrode before the supply of a rising signal with a gradually rising voltage in at least one subfield of several subfields of a frame. The second electrode driver supplies a second signal having a polarity opposite a polarity of the first falling signal to the second electrode during the supply of the first falling signal.Type: GrantFiled: May 23, 2006Date of Patent: June 28, 2011Assignee: LG Electronics Inc.Inventors: Yun Kwon Jung, Muk Hee Kim, Byung Hyun Kim, Yong Hyun Huh
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Patent number: 7969429Abstract: The collector, emitter, and base of a bipolar transistor circuit are connected to a high side power supply terminal, the drain of a level shift transistor, and a floating power supply terminal, respectively. When a high side output transistor is on, the floating power supply terminal is at the potential of a high potential power supply terminal. The high side power supply terminal is at a potential higher than the potential of the floating power supply terminal by a constant voltage. Turning the level shift transistor on, its drain potential drops below the potential of the floating power supply terminal; The base current flows through the bipolar transistor circuit and the drain potential of the level shift transistor is clamped near the potential of the floating power supply terminal; The bipolar transistor circuit is turned on and its collector current supplies the drain current of the level shift transistor.Type: GrantFiled: November 16, 2007Date of Patent: June 28, 2011Assignee: Panasonic CorporationInventors: Masahiko Sasada, Hiroki Matsunaga, Masashi Inao, Hiroshi Ando, Jinsaku Kaneda, Eisaku Maeda, Akihiro Maejima
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Patent number: 7969081Abstract: A plasma display panel includes: pairs of electrodes having first electrode and second electrode which are arranged in parallel with each other; first substrate having dielectric layer formed so that the dielectric layer can cover the pairs of electrodes; and second substrate having third electrode which is arranged crossing the pairs of electrodes, and the plasma display panel further includes: floating electrodes, protruding onto a discharge space provided on dielectric layer at positions respectively corresponding to first electrode and second electrode, wherein floating electrodes are opposed to each other. Due to the above composition, the discharge starting voltage is reduced and the drive voltage is decreased. Accordingly, the light emitting efficiency is enhanced.Type: GrantFiled: September 7, 2006Date of Patent: June 28, 2011Assignee: Panasonic CorporationInventors: Naoki Kosugi, Yukihiro Morita, Masanori Miura, Shinichiro Hashimoto, Yoshio Watanabe
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Publication number: 20110148744Abstract: A first aim of the present invention is to provide a PDP capable of stably delivering favorable image display performance and being driven with low power, by improving the surface layer to improve secondary electron emission characteristics and charge retention characteristics. A second aim of the present invention is to provide a PDP capable of displaying high-definition images even when the PDP is driven at high speed by preventing the discharge delay during driving. In order to achieve these aims, the surface layer (protective film) 8 of a film thickness of approximately 1 ?m is disposed on a surface of the dielectric layer 7 that faces a discharge space 15. The surface layer 8 includes CeO2 as the main component and Ba, and a concentration of Ba in the surface layer 8 is in a range of 16 mol % to 29 mol % inclusive. With this structure, an electron level having a certain depth is introduced in a forbidden band in the surface layer 8, or an electron level of a valence band is elevated to narrow a band gap.Type: ApplicationFiled: January 13, 2010Publication date: June 23, 2011Inventors: Yusuke Fukui, Masahiro Sakai, Mikihiko Nishitani, Yosuke Honda, Michiko Okafuji, Yasuhiro Yamauchi
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Publication number: 20110148951Abstract: A plasma display panel driving method is provided in which one field of an image signal includes a plurality of sub fields each having an initialization period, an address period and a sustain period, one field period includes an all-cell initialization sub field in which an initializing discharge is generated by applying an initialization voltage to all the discharge cells to display the image in the initialization period, the initialization voltage can be varied, and the initialization voltage when an image satisfying predetermined conditions is displayed is set to be lower than an initialization voltage when an image satisfying no predetermined conditions is displayed.Type: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Applicant: PANASONIC CORPORATIONInventors: Minoru TAKEDA, Shigeo KIGO, Tooru KAWASE, Hironari TANIGUCHI
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Patent number: 7965260Abstract: A plasma display apparatus is provided. The plasma display apparatus comprises a plasma display panel for displaying an image using a plasma discharge; and a driver for driving the plasma display panel by enabling a length of an address period of at least one of subfields of a frame to be different from that of an address period of other subfields.Type: GrantFiled: March 6, 2007Date of Patent: June 21, 2011Assignee: LG Electronics Inc.Inventor: Sooseok Sim
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Publication number: 20110141072Abstract: The present invention provides a plasma display panel driving method and a plasma display device, each of which is capable of securing image quality and realizing an improvement of a drive margin and a reduction in power consumption even in the case of an ultra high definition panel. The present invention divides a plurality of display electrode pairs into a plurality of display electrode pair groups. For each of the display electrode pair groups, the present invention divides one field period into a plurality of sub-fields, each including an address period and a sustain period, such that the address periods with respect to the display electrode pair groups do not overlap one another, the address period being a period in which an address process of causing address discharge in the discharge cell which should emit light is carried out, the sustain period being a period in which first and second sustain pulses are applied to a scan electrode and a sustain electrode.Type: ApplicationFiled: June 2, 2010Publication date: June 16, 2011Inventors: Hiroyasu Makino, Toshikazu Wakabayashi, Satoshi Kominami, Yasuhiro Arai, Masumi Izuchi, Junko Matsushita
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Publication number: 20110140996Abstract: A double layer electrowetting display is provided that includes a first electrowetting layer switchable between a reflective mode and a non-reflective mode; and a second electrowetting layer, adjacent the first electrowetting layer, including a plurality of pixels switchable to create an image.Type: ApplicationFiled: December 15, 2009Publication date: June 16, 2011Inventor: Lesley Anne PARRY-JONES
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Patent number: 7961204Abstract: A gray-scale representation method for a plasma display panel, which method includes arranging, in time sequence, a plurality of subfields each having a brightness weight and achieving gray-scale representation by a combination of the subfields, each subfield including an address period and a sustain period. In the gray-scale representation method, the number of sustain pulses for each subfield is determined so that a light generated from the difference of the number of sustain pulses between two adjacent gray scales can be greater than a light discharged in the address period, when the number of subfields for the higher one of the two adjacent gray scales is less than that for the lower one. The reversion of gray scales that occurs when the address light is increased as high as the sustain light can be eliminated to achieve correct gray-scale representation.Type: GrantFiled: September 11, 2007Date of Patent: June 14, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Yong-Jin Kim
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Patent number: 7961203Abstract: A display screen is controlled through successive scans of the display screen. Each scan of the display screen includes a successive selection of rows of the display screen. For each row selected, and in accordance with a normal selection, a first column selection mode is implemented wherein a first selection signal is generated for the column, that first selection signal going from a first state towards a second state with an intermediate plateau level therebetween. In an alternative operation, a second column selection mode is provided which replaces the first column selection mode, the second column selection mode including the generation of a second selection signal going from the first state to the second state without any intermediate plateau level. At least at the start of each scan, the first selection mode is replaced by the second selection mode and this second selection mode is maintained for a given column, at the latest, for as long as no deselection of the column has been effected.Type: GrantFiled: April 18, 2007Date of Patent: June 14, 2011Assignee: STMicroelectronics S.A.Inventors: Jean-Raphaël Bexal, Jérôme Bourgoin
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Publication number: 20110134095Abstract: A drive circuit includes: first and second P-channel MOS transistors connected with a first voltage; a first N-channel MOS transistor connected between the first P-channel MOS transistor and a ground voltage, and having a gate connected with a first node and configured to receive a first input signal; and a second N-channel MOS transistor connected between the second P-channel MOS transistor and the ground voltage and having a gate connected with a second node and configured to receive a second input signal. An output P-channel MOS transistor is connected between the first voltage and an output node and has a gate connected with the second node, and an output N-channel MOS transistor is connected between the output node and the second voltage and has a gate supplied with an input signal having a same polarity as that of the first input signal. A P-channel MOS transistor has a source connected with the first node, a drain connected with the output node, and a gate connected with the second node.Type: ApplicationFiled: December 7, 2010Publication date: June 9, 2011Applicant: RENESAS ELECTRONICS CORPORATIONInventor: Shinichi MURAKAWA
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Publication number: 20110128208Abstract: A multi plasma display device is disclosed. The multi plasma display device includes a first panel, a second panel adjacent to the first panel, and a lens unit positioned so that the lens unit commonly overlaps a portion of a front surface of the first panel and a portion of a front surface of the second panel in a boundary portion between the first panel and the second panel. The lens unit overlaps a seal layer of the first panel and a seal layer of the second panel and does not overlap a discharge cell of the first panel and a discharge cell of the second panel.Type: ApplicationFiled: December 15, 2009Publication date: June 2, 2011Inventor: Manyong CHOI
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Publication number: 20110128270Abstract: A driving method of a plasma display device with reduced black luminance is provided. During at least one TV field without a main reset period, the at least one TV field including a first subfield and a second subfield having a reset waveform in a reset period of the first subfield and the second subfield, respectively, the method includes: applying a first scan low voltage or a first scan high voltage to a scan electrode during an address period of the first subfield; and applying a second scan low voltage or a second scan high voltage to the scan electrode during an address period of the second subfield, wherein the first and the second scan low voltages are maintained at a constant level for a period of time in the first and second subfields, respectively, and the first scan low voltage is different from the second scan low voltage.Type: ApplicationFiled: August 12, 2010Publication date: June 2, 2011Inventors: Woo-Joon Chung, Tae-Jun Kim, Ji-Sun Kim
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Patent number: 7952538Abstract: A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plasma display panel including an address electrode, a control board, and a data driver. The control board converts a video signal input from the outside into a differential signal, and transmits the differential signal, wherein the differential signal includes a first signal and a second signal being an inverted signal of the first signal and has a frequency of 200 MHz or more. The data driver receives the differential signal, restores the video signal from the differential signal, and supplies the restored video signal to the address electrode of the plasma display panel.Type: GrantFiled: December 4, 2006Date of Patent: May 31, 2011Assignee: LG Electronics Inc.Inventors: Jung Gwan Han, Seongho Kang
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Patent number: 7953852Abstract: A method and system for detecting and reducing botnet activity includes tracking the number of connections to a destination address over predetermined periods of time. A persistence value is assigned to the destination address based on the number of time periods during which the destination address was connected. The persistence value is compared to a threshold value and an alert is generated if the persistence value is greater than the threshold value. Known safe destinations may be entered into a whitelist.Type: GrantFiled: December 31, 2008Date of Patent: May 31, 2011Assignee: Intel CorporationInventors: Jaideep Chandrashekar, Eve M. Schooler, Nina Taft, Frederic Giroire
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Publication number: 20110122112Abstract: Even in a plasma display panel of large screen size and high definition, address discharge is caused stably. A plasma display device has a plasma display panel and a scan electrode driving circuit. The plasma display panel includes a discharge cell having a display electrode pair that is formed of a scan electrode and a sustain electrode. A plurality of subfields having an initializing period, an address period, and a sustain period are disposed in one field period. The scan electrode driving circuit generates an increasing first ramp voltage in the initializing period of at least one subfield in one field period, generates sustain pulse voltage that varies from a base potential to a potential for causing sustain discharge in the sustain period, and generates second ramp voltage that is increased and is dropped immediately after reaching a predetermined potential at the end of the sustain period.Type: ApplicationFiled: March 28, 2008Publication date: May 26, 2011Applicant: Panasonic CorporationInventors: Shunsuke Kawai, Kenji Ogawa, Shinichiro Hashimoto
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Publication number: 20110115692Abstract: A plasma display panel (PDP) and a method of manufacturing the same, the PDP including scan electrodes extending parallel to one another, sustain electrodes extending parallel to the scan electrodes, and address electrodes extending across the sustain electrodes and the scan electrodes. The address electrodes are divided into a first address electrode group extending from a first side of the panel, and a second address electrode group extending from an opposing second side of the panel, such that the first and second groups are disposed on different sides of the PDP.Type: ApplicationFiled: August 25, 2010Publication date: May 19, 2011Inventors: Woo-Joon Chung, Tae-Seong Kim
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Patent number: 7944457Abstract: An image display method adapted for a digital display apparatus is provided. The image display method includes the steps of: first, detecting a maximum average picture level of each picture displayed by the digital display apparatus; judging whether the maximum average picture level is larger than a reference value; determining a displaying mode of each picture according to the judgment. The image display method is adapted for improving the displaying quality of a digital display apparatus.Type: GrantFiled: May 17, 2006Date of Patent: May 17, 2011Assignee: Coretronic CorporationInventors: Tzung-I Lin, Yi-Chun Lu, Chia-Yin Lu