Fluid Light Emitter (e.g., Gas, Liquid, Or Plasma) Patents (Class 345/60)
  • Patent number: 8125410
    Abstract: A test pattern generation circuit outputs a test pattern during a clock phase adjustment period. A flip-flop circuit latches the test pattern at the fall of a shift clock and outputs it as a test pattern. A latch miss detection circuit outputs a latch miss detection signal indicating presence/absence of a latch miss generation according to the test pattern and a delay shift clock. A clock phase controller delays the shift clock according to the latch miss detection signal, thereby outputting a delay shift clock.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: February 28, 2012
    Assignee: Panasonic Corporation
    Inventors: Kazuhito Tanaka, Akio Niwa, Mitsuhiro Kasahara, Tadayuki Masumori, Mamoru Seike
  • Patent number: 8125500
    Abstract: A picture quality when reducing the brightness or the contrast of the picture on a plasma panel shall be improved. For this purpose there is provided a driving apparatus including brightness/contrast control means for receiving video input data for modifying the video levels of the video input data in accordance with external adjustment data and for outputting modified video data. First power measurement means measure a power level of the modified video data and supply a first power level. Second power measurement means measure a power level of the video input data and supply a second power level. Generator means generate a third power level comprised between the first power level and the second power level or equal to the larger one to data processing means. The data processing means calculate the maximum number of sustain pulses per frame applicable to the modified video data on the basis of the third power level and control the display of the modified video data on the plasma display panel.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: February 28, 2012
    Assignee: Thomson Licensing
    Inventors: Cédric Thebault, Carlos Correa, Sébastien Weitbruch
  • Patent number: 8125412
    Abstract: A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plasma display panel comprising a first electrode and a second electrode, and a driver. The driver supplies a ramp-up signal in which a voltage gradually rises to the first electrode in a setup period of a reset period, supplies a ramp-down signal in which a voltage gradually falls to the first electrode in a set down period after the setup period, and supplies at least one reset stabilization signal to the first electrode in a period before the ramp-down signal is supplied after the ramp-up signal is supplied.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: February 28, 2012
    Assignee: LG Electronics Inc.
    Inventors: Yonghyun Huh, Mukhee Kim, Yunkwon Jung, Hyunjae Lim
  • Patent number: 8125413
    Abstract: A plasma display device and a method for driving the plasma display device capable of reducing noise. The plasma display device displays images using a plurality of discharge cells, and is constructed with a plurality of first electrodes, a plurality of second electrodes, and a plurality of third electrodes intersecting the first electrodes and second electrodes. The driving method of the plasma display device includes: initializing the plurality of discharge cells; selecting light-emission cells among the plurality of discharge cells; and discharging the light-emission cells by supplying the first electrodes of the light-emission cells with first sustain pulses whose periods are irregular and supplying the second electrodes with second sustain pulses whose periods are irregular and are alternative to the first sustain pulses.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: February 28, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Dong-Hyun Kim
  • Patent number: 8125411
    Abstract: A plasma display apparatus and a driving method thereof are disclosed. The plasma display apparatus includes a plasma display panel comprising a first electrode and a second electrode, and a driver for applying a plurality of sustain signals to the second electrode while applying two consecutive sustain signals to the first electrode in a sustain period. A method of driving a plasma display apparatus includes applying a first sustain signal to a first electrode in a sustain period, after applying the first sustain signal to the first electrode, applying a plurality of sustain signals to a second electrode, and after applying the plurality of sustain signals to the second electrode, applying a second sustain signal consecutive to the first sustain signal to the first electrode.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: February 28, 2012
    Assignee: LG Electronics Inc.
    Inventors: Hyun Jae Lim, Muk Hee Kim, Yong Hyun Huh, Yun Kwon Jung
  • Publication number: 20120044234
    Abstract: In a plasma display device, a secondary coil of a transformer is connected across a panel capacitor formed by a scan electrode and a sustain electrode performing a sustain discharge. The plasma display device uses resonance between a secondary coil of a transformer and a panel capacitor to apply a sustain discharge pulse to a scan electrode and a sustain electrode in a sustain period.
    Type: Application
    Filed: December 10, 2010
    Publication date: February 23, 2012
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Suk-Ki Kim, Sang-Hun Park, Kwan-Il Oh, Sang-Chul Kim
  • Patent number: 8120549
    Abstract: The present method is to drive a plasma display panel which displays a frame composed of a plurality of sub-fields having different weights of luminance. The method comprises using plural kinds of application voltage waveforms different in light emission luminance, as pulse voltages for sustain discharges in display of each sub-field, and adjusting the number of waves in each of the plural kinds of application voltage waveforms according to the weight of luminance set for each sub-field, thereby performing gradation display.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: February 21, 2012
    Assignee: Hitachi Ltd.
    Inventors: Kazushige Takagi, Tadayoshi Kosaka
  • Patent number: 8115702
    Abstract: A plasma display device and a method of driving the same, capable of reducing or preventing the deterioration of components such as a switching device, due to an overcurrent. In a reset period, in order to cause the voltage of a scan electrode to ramp down from a first voltage to a second voltage, a panel driver includes a falling ramp switch that repeats turn-on/turn-off operations, alternately coupling and de-coupling a low-level power supply to the scan electrode, resulting in a gradually falling ramp waveform. A switch controller generates a switching pulse to control the falling ramp switch. Each turn-on time of the switching pulse for the initial falling ramp waveform following a power-on of the plasma display device is controlled to be shorter than each turn-on time of the switching pulse for other falling ramp waveform.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: February 14, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ito Kazuhiro, Yoo-jin Song, Tae-wook Kim
  • Patent number: 8115701
    Abstract: The present invention concerns a device for generating a rectangular sustain voltage between the line scanning electrodes and the line common electrodes of luminous cells in a plasma panel. The device includes a first sustain amplifier connected to the line scanning electrode of the cells to produce the transitions of the first sustain voltage signal, and a second sustain amplifier connected to the line common electrode of the cells to produce the transitions of the second sustain voltage signal. It also includes an insulated voltage supply circuit which is connected directly to the line scanning electrodes and to the line common electrodes of the cells in order to hold the end-of-transition voltage on said line scanning electrodes and said line common electrodes.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: February 14, 2012
    Assignee: Thomson Licensing
    Inventors: Didier Ploquin, Philippe Marchand, Gerard Morizot
  • Patent number: 8115759
    Abstract: Disclosed here is a method for driving a plasma display panel and a plasma display device capable of providing image display with a high contrast ratio and excellent quality by stabilizing an address discharge. According to the method, which is the method for driving a plasma display panel in which discharge cells are formed at intersections of scan electrodes, sustain electrodes and data electrodes, the field—that contains at least one sub-field having the all-cell initializing operation—and the field—that is formed of sub-fields having the selective-cell initializing operation only—are set at a ratio of 1:N (where, N takes an integer of 1 or greater). At the same time, at least in one sub-field of the field having the selective-cell initializing operation only, the scan-pulse width employed for the selective-cell initializing field is determined longer than the scan-pulse width employed for the field containing the all-cell initializing operation.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: February 14, 2012
    Assignee: Panasonic Corporation
    Inventors: Takateru Sawada, Takahiko Origuchi
  • Publication number: 20120032936
    Abstract: A plasma display is disclosed. In the plasma display, a first transistor for applying a low level voltage of a sustain pulse is connected to a high voltage terminal of a scanning circuit and a second transistor for applying a high level voltage of the sustain pulse is connected to a low voltage terminal of the scanning circuit. The first and the second transistors are alternatively turned on during sustain period, and the sustain pulse is applied to the scan electrode.
    Type: Application
    Filed: December 28, 2010
    Publication date: February 9, 2012
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Suk-Ki Kim, Sang-Chul Han, Sang-Hun Park
  • Patent number: 8111213
    Abstract: A driving method of a plasma display device including a plurality of first electrodes divided into a plurality of groups including first and second groups, a plurality of second electrodes, and a plurality of third electrodes that intersect the plurality of first and second electrodes, may include dividing one frame into a plurality of subfields, each subfield including a reset period, an address period and a sustain period so as to be driven by a time division method, supplying a scan pulse and a scan reference voltage to the first group during a first address period in the address period, supplying a compensation pulse to at least one of the first and second groups during an address compensation period in the address period, and supplying the scan pulse and the scan reference voltage to the second group during a second address period in the address period.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: February 7, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jeongmo Kim, Chanyoung Han
  • Patent number: 8111211
    Abstract: A plasma display includes a plurality of first electrodes divided into at least two groups. In the plasma display, first group cells corresponding to first electrodes of the first group are initialized, and light emitting cells are selected from the first group cells to be sustain-discharged. In addition, second group cells corresponding to the first electrodes of the second group are initialized, and light emitting cells are selected from the second group cells to be sustain-discharged.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: February 7, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Joo-Yul Lee
  • Patent number: 8111212
    Abstract: A plasma display driving method in which, in an erase stage of a last sub-field of a one-field display period, a scanning pulse is sequentially applied to one row electrode of each of the row electrode pairs for each scanning line or for each scanning line group having a plurality of scanning lines, while an erase pulse is applied to column electrodes simultaneously with the application of the scanning pulse, to cause an erase discharge between the one row electrode and each of the column electrodes to which the erase pulse is applied.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: February 7, 2012
    Assignee: Panasonic Corporation
    Inventors: Shunsuke Itakura, Koji Hashimoto
  • Publication number: 20120026073
    Abstract: A plasma display device has a plasma display panel (PDP), a first driver circuit, and a first flexible cable. The PDP has a first plate on which a plurality of first and second electrodes extending in a first direction are provided and a second plate facing the first plate via a discharge space. Here, the first driver circuit is a circuit which applies a voltage to the first electrodes. Further, the first flexible cable has one end coupled to the first electrodes in a circumference part of the plasma display panel, and has the other end coupled to the first driver circuit inside a circumference of the plasma display panel without folding back the first flexible cable. Consequently, disconnection between the PDP and the driver circuit can be prevented, and reliability of the PDP device can be improved.
    Type: Application
    Filed: April 25, 2008
    Publication date: February 2, 2012
    Inventors: Ayahito Kojima, Takashi Sasaki
  • Publication number: 20120026137
    Abstract: A driving apparatus of a display device includes a signal controller including a plurality of driving circuit blocks, where the signal controller receives an image signal, input control signals from an outside and a data driver which receives data driving signals output from the signal controller, where a data transmission clock input to at least one of the plurality of driving circuit blocks of the signal controller is inactive during a blank period of at least one of the input control signals.
    Type: Application
    Filed: April 20, 2011
    Publication date: February 2, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-Wan PARK, Myeong-Su KIM, Hyun-Seok KO, Jung-Hwan CHO
  • Publication number: 20120026142
    Abstract: The luminance of black level in an image displayed on a plasma display panel is reduced to enhance the contrast and image display quality. For this purpose, in an initializing period, one of a forced initializing waveform, a selective initializing waveform, and a non-initializing waveform is applied to scan electrodes. Further, one field is formed of a special initializing subfield where the forced initializing waveform and the non-initializing waveform are selectively generated, and a plurality of selective initializing subfields where only the selective initializing waveform is generated. The number of forced initializing waveforms applied to one scan electrode is one in one field group. The non-initializing waveform is applied to the scan electrodes on both sides of the scan electrode applied with the forced initializing waveform in a special initializing subfield, in at least two special initializing subfields, i.e.
    Type: Application
    Filed: April 2, 2010
    Publication date: February 2, 2012
    Applicant: Panasonic Corporation
    Inventors: Yutaka Yoshihama, Kenji Ogawa
  • Patent number: 8106865
    Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2<Lmax1<( 9/10) Lmax2 is satisfied in the one frame period, is provided.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: January 31, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yasunori Yoshida, Hajime Kimura
  • Publication number: 20120019571
    Abstract: In the display of an image having a large black area, the luminance of black level of the display image is reduced so as to enhance the contrast. In the display of an image having a small black area, an address discharge is caused stably. Thereby, the image display quality is enhanced. For this purpose, a specified-cell initializing subfield where a forced initializing waveform is applied to predetermined scan electrodes and a non-initializing waveform is applied to the other scan electrodes in the initializing period, and a selective initializing subfield where a selective initializing waveform is applied to all the scan electrodes in the initializing period are set. A specified-cell initializing field having the specified-cell initializing subfield and the plurality of selective initializing subfields is set. The rate of regions where the gradation values of luminance are less than a predetermined value on the image display surface is calculated as a black area.
    Type: Application
    Filed: April 2, 2010
    Publication date: January 26, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Yutaka Yoshihama, Tsutomu Tokunaga
  • Publication number: 20120013615
    Abstract: Provided is a plasma display device including a plasma display panel that performs gradation display of an image by a sub-field driving method. A protective layer of the plasma display panel includes a base layer formed on a dielectric layer and a plurality of aggregated particles dispersed all over a surface of the base layer. The plasma display device forms an image by a right-eye field in which a right-eye image signal is displayed and a left-eye field in which a left-eye image signal is displayed. The right-eye field and the left-eye field have a plurality of sub-fields. The first sub-field has a minimum luminance weight, the second sub-field has a maximum luminance weight, and the third and subsequent sub-fields have luminance weights decreasing in sequence.
    Type: Application
    Filed: March 11, 2011
    Publication date: January 19, 2012
    Inventors: Kaname Mizokami, Shinsuke Yoshida, Takahiko Origuchi, Yuya Shiozaki
  • Patent number: 8098216
    Abstract: A plasma display apparatus and a driving method thereof are provided. The plasma display apparatus and a driving method thereof represent an image by a combination of a plurality of subfields, supply a first pulse to the first electrode in a negative polarity direction before a reset period for initializing in at least one of the plurality of subfields, supply a second pulse to the second electrode in an opposite polarity direction of the first pulse while the first pulse is supplied to the first electrode, and do not supply a sustain pulse to at least one of the first electrode and the second electrode in a sustain period after the reset period.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: January 17, 2012
    Assignee: LG Electronics Inc.
    Inventors: Kirack Park, Seonghwan Ryu
  • Patent number: 8098013
    Abstract: A plasma display device includes: a front substrate and a back substrate facing each other and interposing a discharge gap; and a plurality of discharge cells formed by the front substrate and the back substrate, wherein a mixture gas containing Xe is filled in the discharge gap, and a red, green, or blue phosphor materials is arranged in each of the discharge cells. The plasma display device performs a reset operation by, at least, a weak discharge. A crystal material is arranged in the red, green, and blue phosphor materials so as to make weak discharge firing voltages for reset discharges in respective discharge cells uniform.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: January 17, 2012
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Norihiro Uemura, Shunichiro Nobuki, Naoya Tokoo, Masakazu Sagawa
  • Patent number: 8098217
    Abstract: Any of first and second sub-field configurations is selected. In the first sub-field configuration, a width of a write pulse of a sub-field with a lowest display luminance is not more than widths of write pulses of the other sub-fields. In the second sub-field configuration, the width of the write pulse of the sub-field with the lowest display luminance is larger than the widths of the write pulses of the other sub-fields. When the first sub-field configuration is selected, a voltage applied to a sustain electrode in a write period of the sub-field with the lowest display luminance is set higher than a voltage applied to the sustain electrode in write periods of the other sub-fields. When the second sub-field configuration is selected, the voltage applied to the sustain electrode in the write period of the sub-field with the lowest display luminance is set to be the same as the voltage applied to the sustain electrode in the write period of any of the other sub-fields.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: January 17, 2012
    Assignee: Panasonic Corporation
    Inventors: Hidehiko Shoji, Takahiko Origuchi
  • Patent number: 8097812
    Abstract: A flexible pixel array substrate includes a flexible base, at least one first driving transistor, at least one second driving transistor and at least one pixel electrode. The first driving transistor is disposed on the flexible base and has a first current channel. The second driving transistor is disposed on the flexible base and has a second current channel. The first current channel is not parallel to the second current channel. The pixel electrode is disposed on the flexible base. The pixel electrode is electrically connected to first driving transistor. The pixel electrode is electrically connected to the second driving transistor. In addition, a flexible display applying the flexible pixel array substrate is also provided. Besides, another flexible pixel array substrate and another flexible display applying the same are also provided.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: January 17, 2012
    Assignee: E Ink Holdings Inc.
    Inventors: Tzu-Ming Wang, Ted-Hong Shinn, Po-Wen Hsiao
  • Publication number: 20120007847
    Abstract: An electrode drive circuit of a plasma display device includes a scan driver provided with plural drivers having first and second switching elements and first and second diodes, and a positive reset pulse generating circuit by which a first superposed voltage obtained by applying a predetermined first voltage to a low potential side terminal of the second switching element and superposing the first voltage and a voltage between a high potential side terminal of the first switching element and the low potential side terminal of the second switching element is generated to the high potential side terminal of the first switching element. The first superposed voltage is applied to the electrodes via the first switching element.
    Type: Application
    Filed: September 20, 2011
    Publication date: January 12, 2012
    Inventors: Yoshikazu KANAZAWA, Shigetoshi Tomio, Takashi Fujisaki
  • Patent number: 8094092
    Abstract: A method of driving a PDP apparatus to sufficiently suppress the background light emission and improve the dark room contrast, in which first electrodes and second electrodes are arranged adjacently, a first display line is formed between one side of the second electrode and the first electrode adjacent thereto, a second display line is formed between the other side of the second electrode and the first electrode adjacent thereto, and the interlaced display that displays the first display line and the second display line alternately in different fields is performed, has been disclosed, wherein the reset voltage that directly relates to the intensity of the background light emission is varied according to the number of times of sustain discharges, the display conditions, and so on, in each subfield and the reset discharge is caused to occur with the minimum voltage in each subfield.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: January 10, 2012
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Yoshikazu Kanazawa, Shigeharu Asao
  • Patent number: 8093818
    Abstract: A plasma display device including a plasma display panel (PDP), a temperature detector for detecting temperature of the PDP, a driver for applying a driving voltage to a scan electrode, and a controller for generating a control signal to control the driver according to the temperature. The driver includes a transistor and first and second resistors. The transistor is coupled between a first power source and the scan electrode. The first power source supplies a scan voltage to the scan electrode. At least one of the first resistor and the second resistor is a variable resistor having a resistance that varies according to the control signal of the controller. A low discharge due to high temperature can be reduced or prevented, and the number of power sources of the plasma display device can be reduced.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: January 10, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jeong-Hoon Kim, Jung-Pil Park, Suk-Ki Kim, Sang-Chul Han
  • Publication number: 20120001882
    Abstract: In a two-phase driving operation that is performed in at least a sub-field having a largest luminance weight, a first ramp waveform that drops from a first potential to a second potential is applied to a plurality of first scan electrodes, a second ramp waveform that drops from a third potential that is higher than the first potential to a fourth potential that is higher than the second potential is applied to a plurality of second scan electrodes in a setup period, and a scan pulse is sequentially applied to the plurality of first scan electrodes, and then a scan pulse is sequentially applied to the plurality of second scan electrodes in a write period. The two-phase driving operation is employed to prevent a discharge failure during a write discharge.
    Type: Application
    Filed: August 26, 2008
    Publication date: January 5, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Takahiko Origuchi, Hidehiko Shoji, Hideki Nakata
  • Patent number: 8089426
    Abstract: A plurality of subfields of a field period includes a subfield for performing an every-cell initialization causing an initial discharge in every discharge cell in an initialization period, and includes a subfield for performing a selective initialization causing the initial discharge in a predetermined discharge cell in the initialization period. In a low-luminance subfield, the every-cell initialization is performed, and a low-luminance subfield is subsequently located (in the field period) to the subfield for the every-cell initialization. In a sustain period of the subfield for performing the every-cell initialization or a sustain period of the low-luminance subfield, a width of a first sustain pulse is set wider than a width of a second sustain pulse, and the width of the second sustain pulse is set wider than the width of a third sustain pulse and subsequent others.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: January 3, 2012
    Assignee: Panasonic Corporation
    Inventors: Kenji Ogawa, Tomohiro Murakoso, Yoshiki Tsujita, Kenji Sasaki, Yohei Koshio
  • Publication number: 20110316764
    Abstract: A display which includes an array of pixels. Each pixel includes a hydrophobic layer; an electro-wetting fluid adjacent the hydrophobic layer, the electro-wetting fluid including at least first and second fluids immiscible with each other and having different polar properties and different optical properties; and at least one electrode wherein application of a voltage to the electrode alters a wetting effect of the electro-wetting fluid on the hydrophobic layer in a light-modulating area of the pixel. The display further includes a light-concentrating substrate including an array of light-concentrating structures each configured to concentrate light onto the light-modulating area of a corresponding one or more pixels within the array of pixels.
    Type: Application
    Filed: June 23, 2010
    Publication date: December 29, 2011
    Inventors: Lesley Anne PARRY-JONES, Alistair Paul Curd
  • Patent number: 8085222
    Abstract: A plasma display device and a driving method thereof are provided. The plasma display device has a panel having a plurality of discharge cells including a display electrode pair that is formed of a scan electrode and a sustain electrode, and a temperature detecting circuit for detecting the ambient temperature of the panel and outputting the detected temperature. In the driving method, an unusual charge erasing period when a rectangular waveform voltage is applied to the scan electrode is disposed between the initializing period and address period of at least one of a plurality of subfields, and the number of subfields having the unusual charge erasing period is controlled based on the detected temperature detected by the temperature detecting circuit.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: December 27, 2011
    Assignee: Panasonic Corporation
    Inventors: Taku Okada, Minoru Takeda, Yohei Koshio, Shinichiro Hashimoto, Kenji Ogawa
  • Patent number: 8085220
    Abstract: A plasma display apparatus having a priming discharge region PDC partitioned from a display discharge cell DDC, by a traverse rib, at a side where the second electrode between the display discharge cell DDC adjacent in a row direction is adjacent; a second longitudinal rib partitioning the priming discharge region PDC; a third longitudinal rib, further partitioning a region partitioned by the second longitudinal rib into two sections; a convex electrode; and a gap connecting the display discharge cell DDC and the priming discharge cell PDC, wherein a sum of a width in a line direction of a nearly rectangular space region containing adjacent two priming discharge cells PDCs, and a pattern width of the second longitudinal rib is designed larger than a sum of a width in the row direction and a pattern width of the traverse rib.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: December 27, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Shunichiro Nobuki, Norihiro Uemura, Masakazu Sagawa, Keizo Suzuki, Yoshiro Mikami, Hideto Momose, Shirun Ho
  • Patent number: 8085219
    Abstract: A plasma display device and a driving method thereof which can prevent address discharging from low discharging. The driving method of the plasma display device includes a plasma display panel having first to third electrodes divided into a plurality of groups including a first group and a second group, and a frame divided into a plurality of sub-fields, each sub-field divided into a reset period, an address period, and a sustain period, the method includes during an address period: sequentially supplying the first group with a scan pulse, supplying a sub scan pulse to the second group, and sequentially supplying the second group with the scan pulse.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: December 27, 2011
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Keunyoung Song, Chanyoung Han
  • Patent number: 8079225
    Abstract: A refrigerating appliance provided with a display including at least one organic light-emitting diode (OLED). The display can include a plurality of individual displays which are respectively provided with at least one OLED, and are superimposed in a sandwich-type arrangement and can be of different colors.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: December 20, 2011
    Assignee: BSH Bosch und Siemens Hausgeraete GmbH
    Inventors: Peter Bauer, Fritz Hägele, Erich Hell
  • Patent number: 8081144
    Abstract: A plasma display panel is driven by providing a plurality of subfields within one field period, the subfield having an initializing period in which the initializing discharge is generated in a discharge cell by applying a ramp-waveform voltage that is gradually descending to a scan electrode, an address period in which an address discharge is generated in the discharge cell by applying a scan pulse voltage to the scan electrode, and a sustain period in which sustain discharges by the number of times corresponding to the luminance weight are generated in the selected discharge cell. The lowest voltage is set of the descending ramp-waveform voltage in the subfield where the luminance weight is the smallest lower than the same voltage in the subfield where the luminance weight is the largest, and a voltage is kept for a prescribed period after the descending ramp-waveform voltage reaches the lowest voltage in the subfield where the luminance weight is the smallest.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: December 20, 2011
    Assignee: Panasonic Corporation
    Inventors: Takahiko Origuchi, Hidehiko Shoji, Mitsuo Ueda
  • Patent number: 8081143
    Abstract: A plasma display apparatus is disclosed. The plasma display apparatus includes a plasma display panel including an address electrode, and a data driver. The data driver supplies a data signal having at least three voltage levels to the address electrode during an address period using different voltages received from first and second constant voltage sources.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: December 20, 2011
    Assignee: LG Electronics Inc.
    Inventor: Janghwan Cho
  • Patent number: 8081173
    Abstract: A plasma display panel includes a front substrate and a rear substrate faced to each other to form a discharge space therebetween. The front substrate includes a plurality of display electrodes, each made of a scan electrode and a sustain electrode. The rear substrate includes a plurality of data electrodes intersected with the display electrodes. Discharges cells are formed at the intersections of the display electrodes and the data electrodes. The data electrodes have a plurality of main electrode parts in portions faced to the display electrodes, and wiring parts connecting the main electrode parts together and narrower than the main electrode parts. Further, each main electrode part is disposed so that ends thereof in the longitudinal direction of the data electrode substantially correspond to the furthest separated long sides of the scan electrode and the sustain electrode in the discharge cell.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: December 20, 2011
    Assignee: Panasonic Corporation
    Inventors: Katsutoshi Shindo, Tetsuya Shirai
  • Patent number: 8076851
    Abstract: A plasma display panel including a front substrate and a back substrate facing each other across a discharge space, and a plurality of row electrode pairs and a plurality of column electrodes extending in a direction orthogonal to the row electrodes. The row electrodes and said column electrodes being provided between the front substrate and the back substrate and forming unit light emission areas at intersections with each other within the discharge space. A crystal having a volumetric particle-size distribution in which a ratio of a crystal having a particle size of 0.7 ?m or less is 25% or less, is provided in an area facing the discharge space between the front substrate and the back substrate.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: December 13, 2011
    Assignee: Panasonic Corporation
    Inventors: Taro Naoi, Hai Lin, Eishiro Otani, Hiroshi Ito
  • Patent number: 8077448
    Abstract: An improved structure of a plasma display apparatus is provided. At least one of an integrated circuit and a driving board is formed over an edge potion of a frame for supporting a plasma display panel. Thus, the plasma display apparatus is manufactured to be thin and light, and also its manufacturing cost decreases.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: December 13, 2011
    Assignee: LG Electronics Inc.
    Inventors: Jaeyoung Oh, Jung Gwan Han, Sam Je Cho
  • Patent number: 8077119
    Abstract: A display panel drive apparatus which reduces noise to thereby prevent malfunction. A first switch connects based on pixel data between one of column electrodes of a display panel and a power supply line to which a pulsed supply voltage is applied. A second switch connects between the one column electrode and a ground line based on the pixel data. The first and second switches are used to apply pixel data pulses based on the pixel data to the one column electrode. In this scheme, the pixel data having a lower frequency in the vertical direction of the screen allows the second switch to send a smaller current to the ground line when compared with a case of the pixel data having a higher frequency.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: December 13, 2011
    Assignee: Panasonic Corporation
    Inventors: Takashi Iwami, Tomoaki Tatsumi
  • Patent number: 8077120
    Abstract: A plasma display panel driving method and a plasma display device capable of reducing initializing spots generated immediately after the start of driving the plasma display panel, and improving the quality of images to be displayed. A plurality of subfields, each including an initializing period, an address period, and a sustain period, are provided in one field. The one field includes at least one of the subfields in which a gently increasing ramp waveform voltage is applied to the scan electrodes in the initializing period thereof. The ramp waveform voltage to be applied to the scan electrodes for the first time after the start of driving the plasma display panel is generated so as to have a gentler slope than the other ramp waveform voltages have.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: December 13, 2011
    Assignee: Panasonic Corporation
    Inventor: Yutaka Yoshihama
  • Patent number: 8077173
    Abstract: A driving device that drives a display device using a subfield driving method eliminates the need to use an expensive 1-frame delay memory. A compensated sustain pulse data generator enables displaying the same frame information on the display panel even when the 1-frame delay memory is eliminated. The drive data is generated so that the data that is delayed one frame and is included in the data output from the subfield processing unit and the data that is delayed one frame and is included in the data output from the compensated sustain pulse data generator are mutually cancelling.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: December 13, 2011
    Assignee: Panasonic Corporation
    Inventors: Mitsuhiro Mori, Tomoe Ogawa
  • Patent number: 8077121
    Abstract: The present invention sufficiently reduces unwanted radiation in a plasma display panel (PDP) display device. The display device includes a PDP having a pair of electrodes, a first, a second, and a third conductive member, and a pair of driving circuits used to apply a voltage to their respective electrodes. Each conductive member has substantially the same width and height as the PDP, and the first, second, third conductive members are disposed on the rear surface of the PDP, in this order on the rear side of the PDP. The PDP and the conductive members are connected electrically to one another in the end portions of these elements, either directly or via the driving circuits, so that the direction of the current flowing in the PDP during driving and discharge coincides with the direction of the current flowing in the third conductive member, and is opposite from the direction of the current flowing in the first conductive member and the second conductive member.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: December 13, 2011
    Assignee: Panasonic Corporation
    Inventors: Kei Ichikawa, Hirotsugu Fusayasu, Hiroshi Kunimoto, Seiji Hamada, Ryo Matsubara
  • Patent number: 8072447
    Abstract: A display drive device includes a low-voltage circuit section driven by a first power supply potential and a high-voltage circuit section driven by a second power supply potential higher than the first power supply potential. The display drive device further includes a voltage supply circuit for supplying a third power supply potential different from the first and second power supply potentials, a common power supply line for connecting the third power supply potential to each of a plurality of output terminals, an output selection switch circuit for temporarily switching between display data output via the high-voltage circuit section to each output terminal, and the common power supply line, during a predetermined period, and a display data determining circuit for generating a control signal for controlling the output selection switch circuit. Thereby, the common power supply line is temporarily selected and controlled without signal collision when display data is switched.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: December 6, 2011
    Assignee: Panasonic Corporation
    Inventors: Seiichi Moriyama, Mamoru Seike
  • Patent number: 8072395
    Abstract: A plasma display apparatus includes a data driver and a plasma display panel having a first address electrode and a second address electrode. The data driver is configured to initiate a change in a voltage value of a first data signal supplied to the first address electrode at a first initiation time, and to initiate a change in a voltage value of a second data signal supplied to the second address electrode at a second, different initiation time. Each of the data signals gradually changes from a first data voltage to a second data voltage during a respective first period, maintains at the second data voltage during a respective second period, and gradually changes from the second data voltage to a third data voltage during a respective third period.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: December 6, 2011
    Assignee: LG Electronics Inc.
    Inventor: Young Dae Kim
  • Patent number: 8068069
    Abstract: Plural subfields are provided in one single field period, where each subfield has an initialization period during which a gradient waveform voltage gently falling is applied to a scan electrode to generate initializing discharge in a discharge cell; a writing period during which a scan pulse voltage is applied to a scan electrode to generate writing discharge in a discharge cell; and a sustain period during which sustain discharge is generated in a discharge cell selected, by the number of times corresponding to a luminance weight. The lowest voltage of a falling gradient waveform voltage in a subfield with the smallest luminance weight is set so as to be lower than that with the largest luminance weight. A method of driving a plasma display panel is provided that generates stable writing discharge without increasing voltage required for generating writing discharge even for a large-screen, high-luminance panel.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: November 29, 2011
    Assignee: Panasonic Corporation
    Inventors: Takahiko Origuchi, Hidehiko Shoji, Mitsuo Ueda
  • Publication number: 20110285672
    Abstract: A pointing device and a display apparatus applying the same are provided. The pointing device corrects an error that occurs in a boundary between block in calculating a current location of the pointing device and calculates the current location. Accordingly, an error occurring in a boundary between blocks in calculating a current location of the pointing device is prevented.
    Type: Application
    Filed: May 24, 2011
    Publication date: November 24, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Byung-seok SOH, Sang-on CHOI, Yong-wan CHOI, Mi-ra YU
  • Patent number: 8059064
    Abstract: A method of driving a plasma display panel for avoiding an erroneous discharge. The plasma display panel has display cells formed at respective intersections of row electrode pairs and a column electrode, wherein one field of a video signal is comprised of a plurality of sub-fields, and a reset period is provided prior to an addressing period of a starting sub-field. The method has a light emission load state detection stage for detecting a light emission load state of the plasma display panel according to the video signal in the preceding field, and a first stage in the reset period for applying the first row electrodes with a pulse of a first polarity which has an applied voltage value increased over time to reach a predetermined target potential, wherein the first stage includes controlling the target potential of the first polarity pulse according to the light emission load state.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: November 15, 2011
    Assignee: Panasonic Corporation
    Inventor: Shunsuke Itakura
  • Patent number: 8054246
    Abstract: A plasma display apparatus comprises a controller, data transmitting unit, data driver, and plasma display panel. The controller outputs m channels of image data and the data transmitting unit transmits the image data through the m channels. The data driver includes a data arranging unit which receives the m channels of image data and outputs n channels of addressing data. The number n may be greater than m. Also, the data arranging unit may include a memory for storing image data corresponding to one frame, so that a driver of the data arranging unit can receive image data from the controller in any input period of one frame period.
    Type: Grant
    Filed: March 3, 2006
    Date of Patent: November 8, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seong Hee Park, Jeong Pil Choi
  • Patent number: RE43083
    Abstract: A gas discharge panel includes a first substrate and a second substrate. A plurality of display electrode pairs which are each made up of a sustain electrode and a scan electrode are formed on the first substrate, and the first substrate and the second substrate are set facing each other with a plurality of barrier ribs in between so as to form a plurality of cells. In this gas discharge panel, at least one of the sustain electrode and the scan electrode includes: a plurality of line parts; and a discharge developing part which makes a gap between adjacent line parts smaller in areas corresponding to channels between adjacent barrier ribs than in areas corresponding to the barrier ribs.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: January 10, 2012
    Assignee: Panasonic Corporation
    Inventors: Masaki Nishimura, Hidetaka Higashino, Ryuichi Murai, Yusuke Takata, Nobuaki Nagao, Toru Ando, Naoki Kosugi, Hiroyuki Tachibana