Fluid Light Emitter (e.g., Gas, Liquid, Or Plasma) Patents (Class 345/60)
  • Patent number: 7999763
    Abstract: 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: Grant
    Filed: January 12, 2007
    Date of Patent: August 16, 2011
    Assignee: LG Electronics Inc.
    Inventors: Jung Gwan Han, Bong Sup Jung, Chi Yun Ok, Hyun Lark Do
  • Patent number: 7999766
    Abstract: 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: Grant
    Filed: February 14, 2008
    Date of Patent: August 16, 2011
    Assignee: Panasonic Corporation
    Inventors: Sohei Okamoto, Takatoshi Shoji, Hiroshi Shirasawa
  • Patent number: 7999765
    Abstract: The present invention relates to a plasma display panel, and more specifically, a method and an apparatus for driving a plasma display panel.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: August 16, 2011
    Assignee: LG Electronics Inc.
    Inventors: Oe Dong Kim, Jung Hun Kim
  • Patent number: 7999762
    Abstract: 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: Grant
    Filed: September 27, 2006
    Date of Patent: August 16, 2011
    Assignee: LG Electronics Inc.
    Inventors: Moon Shick Chung, Young Seop Moon, Chang Young Kwon
  • Patent number: 7999761
    Abstract: 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: Grant
    Filed: May 22, 2006
    Date of Patent: August 16, 2011
    Assignee: LG Electronics Inc.
    Inventors: Sonic Kim, Jung Gwan Ilan, An Soo Kim
  • Patent number: 7995005
    Abstract: The present invention relates to a plasma display panel, and more specifically, a method and an apparatus for driving a plasma display panel.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: August 9, 2011
    Assignee: LG Electronics Inc.
    Inventors: Oe Dong Kim, Jung Hun Kim
  • Patent number: 7995006
    Abstract: 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: Grant
    Filed: February 13, 2007
    Date of Patent: August 9, 2011
    Assignee: Panasonic Corporation
    Inventors: Minoru Takeda, Shigeo Kigo, Yasuaki Mutou
  • Patent number: 7990342
    Abstract: 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: Grant
    Filed: October 1, 2004
    Date of Patent: August 2, 2011
    Assignee: Panasonic Corporation
    Inventor: Kazuhiro Yamada
  • Patent number: 7990345
    Abstract: 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: Grant
    Filed: September 10, 2007
    Date of Patent: August 2, 2011
    Assignee: Panasonic Corporation
    Inventors: Shunsuke Itakura, Atsushi Hirota, Hai Lin, Tsutomu Tokunaga
  • Patent number: 7990344
    Abstract: 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: Grant
    Filed: February 13, 2007
    Date of Patent: August 2, 2011
    Assignee: Panasonic Corporation
    Inventors: Toshiyuki Maeda, Shigeo Kigo, Yoshiki Tsujita, Naoyuki Tomioka, Takeru Yamashita, Kei Kitatani
  • Patent number: 7990340
    Abstract: 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: Grant
    Filed: November 8, 2006
    Date of Patent: August 2, 2011
    Assignee: LG Electronics Inc.
    Inventors: Hyun Il Park, Chang Young Kwon, Yun Kwon Jung, Jong Sik Lim, Kyu Choon Cho, Yang Ki An
  • Patent number: 7990341
    Abstract: 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: Grant
    Filed: July 26, 2005
    Date of Patent: August 2, 2011
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Naoki Itokawa, Tetsuya Sakamoto, Takayuki Kobayashi, Tomokatsu Kishi, Yasunobu Hashimoto
  • Publication number: 20110181499
    Abstract: 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: Application
    Filed: November 9, 2009
    Publication date: July 28, 2011
    Inventor: Iwao Ueno
  • Patent number: 7986316
    Abstract: 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: Grant
    Filed: November 8, 2006
    Date of Patent: July 26, 2011
    Assignee: Thomson Licensing
    Inventors: Carlos Correa, Cédric Thebault, Rainer Zwing
  • Patent number: 7986284
    Abstract: 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: Grant
    Filed: October 12, 2007
    Date of Patent: July 26, 2011
    Assignee: LG Electronics Inc.
    Inventor: Youngseop Moon
  • Publication number: 20110175891
    Abstract: 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: Application
    Filed: September 10, 2008
    Publication date: July 21, 2011
    Inventors: Isao Furukawa, Yasunobu Hashimoto, Koichi Sakita
  • Publication number: 20110175889
    Abstract: 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: Application
    Filed: September 30, 2009
    Publication date: July 21, 2011
    Inventors: Hwan Woo Lee, Gap Sik Park
  • Publication number: 20110175887
    Abstract: 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: Application
    Filed: March 31, 2011
    Publication date: July 21, 2011
    Applicant: STMICROELECTRONICS, S.A.
    Inventors: Jean-Raphaël Bexal, Jérôme Bourgoin
  • Publication number: 20110175851
    Abstract: 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: Application
    Filed: August 4, 2010
    Publication date: July 21, 2011
    Inventors: Hyun-Chul Do, Im-Su Choi, Young-Sun Kim
  • Patent number: 7982730
    Abstract: 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: Grant
    Filed: November 7, 2006
    Date of Patent: July 19, 2011
    Assignee: Thomson Licensing
    Inventors: Carlos Correa, Cédric Thebault, Rainer Zwing
  • Publication number: 20110169876
    Abstract: 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: Application
    Filed: February 25, 2011
    Publication date: July 14, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Shunsuke ITAKURA, Atsushi HIROTA, Hai LIN, Tsutomu TOKUNAGA
  • Publication number: 20110169716
    Abstract: 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: Application
    Filed: January 6, 2011
    Publication date: July 14, 2011
    Inventors: Kyungtae KIM, Seungmun SHIN, Youngjoon AHN
  • Publication number: 20110169811
    Abstract: 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: Application
    Filed: April 15, 2009
    Publication date: July 14, 2011
    Applicant: Panasonic Corporation
    Inventor: Toshikazu Nagaki
  • Publication number: 20110169875
    Abstract: 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: Application
    Filed: February 25, 2011
    Publication date: July 14, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Shunsuke ITAKURA, Atsushi HIROTA, Hai LIN, Tsutomu TOKUNAGA
  • Publication number: 20110169807
    Abstract: 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: Application
    Filed: February 25, 2011
    Publication date: July 14, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Shunsuke ITAKURA, Atsushi HIROTA, Hai LIN, Tsutomu TOKUNAGA
  • Patent number: 7978154
    Abstract: 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: Grant
    Filed: February 5, 2007
    Date of Patent: July 12, 2011
    Assignee: Imaging Systems Technology, Inc.
    Inventors: Oliver M. Strbik, III, Daniel K. Wedding, Carol Ann Wedding
  • Patent number: 7978153
    Abstract: 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: Grant
    Filed: May 5, 2006
    Date of Patent: July 12, 2011
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Sojiro Hagihara, Akihiro Machida, Hidenori Ohnuki, Hideaki Ohki
  • Publication number: 20110164074
    Abstract: 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: Application
    Filed: August 28, 2008
    Publication date: July 7, 2011
    Applicant: Siemens Aktiengesellschaft
    Inventors: Edgar Frank, Benjamin Kohler, Jörg Middel, Wolfgang Riedl, Christian Strömsdörfer, Frank Volkmann, Sabastian Wittig
  • Patent number: 7973741
    Abstract: 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: Grant
    Filed: May 28, 2008
    Date of Patent: July 5, 2011
    Assignee: Panasonic Corporation
    Inventors: Shinya Tsuchida, Shinji Hirakawa, Mitsuhiro Ishizuka, Koji Hashimoto, Hajime Homma
  • Publication number: 20110157139
    Abstract: 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: Application
    Filed: July 7, 2010
    Publication date: June 30, 2011
    Inventor: Hideki Nakata
  • Publication number: 20110157258
    Abstract: 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: Application
    Filed: June 3, 2009
    Publication date: June 30, 2011
    Applicant: Panasonic Corporation
    Inventors: Takahiko Origuchi, Hidehiko Shoji, Tomoyuki Saito
  • Patent number: 7969387
    Abstract: 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: Grant
    Filed: April 14, 2008
    Date of Patent: June 28, 2011
    Assignee: Panasonic Corporation
    Inventor: Nobuhiko Nakamura
  • Patent number: 7969386
    Abstract: 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: Grant
    Filed: May 23, 2006
    Date of Patent: June 28, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yun Kwon Jung, Muk Hee Kim, Byung Hyun Kim, Yong Hyun Huh
  • Patent number: 7969429
    Abstract: 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: Grant
    Filed: November 16, 2007
    Date of Patent: June 28, 2011
    Assignee: Panasonic Corporation
    Inventors: Masahiko Sasada, Hiroki Matsunaga, Masashi Inao, Hiroshi Ando, Jinsaku Kaneda, Eisaku Maeda, Akihiro Maejima
  • Patent number: 7969081
    Abstract: 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: Grant
    Filed: September 7, 2006
    Date of Patent: June 28, 2011
    Assignee: Panasonic Corporation
    Inventors: Naoki Kosugi, Yukihiro Morita, Masanori Miura, Shinichiro Hashimoto, Yoshio Watanabe
  • Publication number: 20110148744
    Abstract: 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: Application
    Filed: January 13, 2010
    Publication date: June 23, 2011
    Inventors: Yusuke Fukui, Masahiro Sakai, Mikihiko Nishitani, Yosuke Honda, Michiko Okafuji, Yasuhiro Yamauchi
  • Publication number: 20110148951
    Abstract: 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: Application
    Filed: February 28, 2011
    Publication date: June 23, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Minoru TAKEDA, Shigeo KIGO, Tooru KAWASE, Hironari TANIGUCHI
  • Patent number: 7965260
    Abstract: 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: Grant
    Filed: March 6, 2007
    Date of Patent: June 21, 2011
    Assignee: LG Electronics Inc.
    Inventor: Sooseok Sim
  • Publication number: 20110141072
    Abstract: 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: Application
    Filed: June 2, 2010
    Publication date: June 16, 2011
    Inventors: Hiroyasu Makino, Toshikazu Wakabayashi, Satoshi Kominami, Yasuhiro Arai, Masumi Izuchi, Junko Matsushita
  • Publication number: 20110140996
    Abstract: 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: Application
    Filed: December 15, 2009
    Publication date: June 16, 2011
    Inventor: Lesley Anne PARRY-JONES
  • Patent number: 7961204
    Abstract: 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: Grant
    Filed: September 11, 2007
    Date of Patent: June 14, 2011
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Yong-Jin Kim
  • Patent number: 7961203
    Abstract: 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: Grant
    Filed: April 18, 2007
    Date of Patent: June 14, 2011
    Assignee: STMicroelectronics S.A.
    Inventors: Jean-Raphaël Bexal, Jérôme Bourgoin
  • Publication number: 20110134095
    Abstract: 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: Application
    Filed: December 7, 2010
    Publication date: June 9, 2011
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventor: Shinichi MURAKAWA
  • Publication number: 20110128208
    Abstract: 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: Application
    Filed: December 15, 2009
    Publication date: June 2, 2011
    Inventor: Manyong CHOI
  • Publication number: 20110128270
    Abstract: 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: Application
    Filed: August 12, 2010
    Publication date: June 2, 2011
    Inventors: Woo-Joon Chung, Tae-Jun Kim, Ji-Sun Kim
  • Patent number: 7952538
    Abstract: 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: Grant
    Filed: December 4, 2006
    Date of Patent: May 31, 2011
    Assignee: LG Electronics Inc.
    Inventors: Jung Gwan Han, Seongho Kang
  • Patent number: 7953852
    Abstract: 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: Grant
    Filed: December 31, 2008
    Date of Patent: May 31, 2011
    Assignee: Intel Corporation
    Inventors: Jaideep Chandrashekar, Eve M. Schooler, Nina Taft, Frederic Giroire
  • Publication number: 20110122112
    Abstract: 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: Application
    Filed: March 28, 2008
    Publication date: May 26, 2011
    Applicant: Panasonic Corporation
    Inventors: Shunsuke Kawai, Kenji Ogawa, Shinichiro Hashimoto
  • Publication number: 20110115692
    Abstract: 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: Application
    Filed: August 25, 2010
    Publication date: May 19, 2011
    Inventors: Woo-Joon Chung, Tae-Seong Kim
  • Patent number: 7944457
    Abstract: 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: Grant
    Filed: May 17, 2006
    Date of Patent: May 17, 2011
    Assignee: Coretronic Corporation
    Inventors: Tzung-I Lin, Yi-Chun Lu, Chia-Yin Lu