Fluid Light Emitter (e.g., Gas, Liquid, Or Plasma) Patents (Class 345/60)
-
Patent number: 8054257Abstract: An OLED display and a driving method of an inspection circuit are provided. The OLED display may include a data driver, a scan driver, a driving transistor, a switching transistor, an organic light emitting diode, and an inspection circuit. The data driver and scan driver may apply a data signal and a scan signal. The driving transistor may generate a current corresponding to a voltage supplied to a first electrode and a control electrode. The switching transistor may apply the data signal to the driving transistor. The organic light emitting diode may be electrically connected to the driving transistor. The inspection circuit may include a three-phase inverter circuit having an input and an output terminal. The input terminal may supply a first power voltage to the output terminal when the output terminal decides an output signal regardless of a signal input to the input terminal.Type: GrantFiled: April 11, 2007Date of Patent: November 8, 2011Assignee: Samsung Mobile Display Co., Ltd.Inventors: Won-Kyu Kwak, Jin-Tae Jeong
-
Patent number: 8054247Abstract: In a method for driving a display, one frame may be divided into more sub frames than a number of bits of data. A time period of the one frame may be divided into a number of periods corresponding to a number of scan lines multiplied by the number of sub frames. A start position of the sub frames may be set based on a bit weight of the data so that gradations are linearly expressed. Remainders of the sub frames may be obtained by dividing the start position of the sub frames by the number of sub frames. A line number of a scan line to which a scan signal is supplied may be obtained based on the time period of the one frame, the start position of the sub frames, and the number of the sub frames.Type: GrantFiled: August 23, 2007Date of Patent: November 8, 2011Assignee: Samsung Mobile Display Co., Ltd.Inventors: Do Hyung Ryu, Do Ik Kim
-
Patent number: 8054248Abstract: A driving method of a plasma display panel may be provided such that the plasma display panel may be driven stably under a high temperature environment. The method may include applying a scan pulse to the scan electrode during an address period, applying a first DC voltage to the sustain electrode during the set-down period, applying a second DC voltage to the sustain electrode during the first address period after applying the falling waveform to the scan electrode, and applying a third DC voltage to the sustain electrode during the second address period after applying the second DC voltage to the sustain electrode. A difference between the second DC voltage and a lowest voltage of the scan pulse applied during the first address period is lower than a difference between the third DC voltage and a lowest voltage of the scan pulse applied during the second address period.Type: GrantFiled: December 18, 2007Date of Patent: November 8, 2011Assignee: LG Electronics Inc.Inventors: Moon Shick Chung, Jeong Pil Choi
-
Patent number: 8054245Abstract: A plasma display apparatus and a method of driving the plasma display apparatus are provided. A maintenance period of a sustain signal changes depending on a temperature of a plasma display panel or an ambient temperature of the plasma display panel.Type: GrantFiled: June 12, 2006Date of Patent: November 8, 2011Assignee: LG Electronics Inc.Inventors: Won Jae Kim, Sung Im Lee
-
Publication number: 20110267378Abstract: A method for driving a plasma display panel is provided in which wasteful power consumption is reduced and light emission efficiency is improved when the number of cells to be lighted is relatively small. The method includes classifying a display ratio into plural group ranges, selecting a suitable display pulse waveform for each group range, detecting the display ratio of an object to be displayed in a real display, and plural types of display pulses having different waveforms are used differently in accordance with the result of the detection. The display ratio means a ratio of the number of cells to be lighted to the number of cells of the screen.Type: ApplicationFiled: July 5, 2011Publication date: November 3, 2011Applicants: HITACHI PLASMA DISPLAY LIMITED, HITACHI PLASMA PATENT LICENSING CO., LTD.Inventors: Naoki Itokawa, Yoshiho Seo, Yasunobu Hashimoto, Tetsuya Sakamoto, Tomokatsu Kishi
-
Patent number: 8049682Abstract: There is provided a plasma display device. The plasma display device includes a plasma display panel (PDP) and a driving unit for generating driving signals for driving the PDP. A period in which sustain signals are supplied to the PDP includes a first period in which sustain signals supplied to the PDP gradually increase from a reference voltage to a first voltage, a second period for sustaining a second voltage higher than the first voltage, a third period gradually falling from the second voltage to a third voltage higher than the reference voltage, and a fourth period for sustaining the reference voltage. The length of the first period is shorter than the length of the third period. The first switch is turned on at a point of time before the magnitude of current that flows through the inductor reaches a maximum value and then, becomes 0 in the first period.Type: GrantFiled: November 5, 2008Date of Patent: November 1, 2011Assignee: LG Electronics Inc.Inventors: Ki Rack Park, Jong Woon Bae, Seong Hwan Ryu
-
Patent number: 8049183Abstract: Apparatuses and methods for the control and self-assembly of particles into adaptable monolayers and changing the relative position of a plurality of particles at an interface between two fluids, including applying an electric field perpendicular to the interface; moving the particles vertically in the interface in response to applying the electric field; moving the particles laterally within the interface in response to the electric field and capillary forces; maintaining the particles at the interface when moving the particles vertically; and maintaining the particles at the interface when moving the particles laterally.Type: GrantFiled: November 7, 2008Date of Patent: November 1, 2011Assignee: Carnegie Mellon UniversityInventors: Nadine N. Aubry, Pushpendra Singh, Sai Nudurupati, Muhammad Mansoor Janjua
-
Patent number: 8049681Abstract: A waveform generator capable of generating a square wave and a ramp wave using one switching element is provided. A waveform generator includes a first transistor having a drain electrode, a gate electrode, and a source electrode. A first resistor and a first diode are coupled at a common node between a first input terminal and the gate electrode. A second resistor is coupled between the gate electrode and a second input terminal. A first capacitor is coupled between the drain electrode and the common node between the first resistor and the first diode.Type: GrantFiled: October 9, 2008Date of Patent: November 1, 2011Assignee: Samsung SDI Co., Ltd.Inventors: Hak-Cheol Yang, Joon-Yeon Kim, Yon-Goo Park, Jong-Ki Choi
-
Patent number: 8044888Abstract: A surface-discharge type PDP includes plural electrode pairs formed of first and second sustain electrodes arranged on a first substrate. Each pair extends along a line direction, and the first and second sustain electrodes are in parallel and adjacent to each other. Plural address electrodes arranged on a second substrate opposing the first substrate via a discharge space, each extending along a row direction, a matrix corresponding to a screen to be displayed is formed with the main electrodes and address electrodes, the address electrodes are orthogonal to the main electrodes, each of the address electrode is divided into, for example two partial address electrodes separated from each other by a border line located between adjacent main electrode pairs, whereby the screen is divided into two partial screens, wherein a first clearance between the partial address electrodes is substantially larger than a second clearance between main electrode pair adjacent across the border line.Type: GrantFiled: February 13, 2009Date of Patent: October 25, 2011Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Seiki Kuroki, Nguyen Thanh Nhan
-
Patent number: 8044890Abstract: A method for driving a plasma display device including first electrodes and second electrodes. In one embodiment, the plurality of first electrodes are divided into a plurality of groups including first and second groups. During a first period of a sustain period, a second voltage is applied to the first and second groups of the first electrodes while a first voltage is applied to the second electrodes, the second voltage being higher than the first voltage. During a second period of the sustain period, while the second voltage is applied to the second electrodes, the first voltage is applied to the first group of the first electrodes, and the first voltage is applied to the second group of the first electrodes a period of time after when the first voltage is initially applied to the first group of the first electrodes.Type: GrantFiled: November 14, 2007Date of Patent: October 25, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Joo-Yul Lee
-
Patent number: 8044883Abstract: A method of driving a plasma display apparatus is provided. The method of driving the plasma display apparatus includes applying a first pulse to a first electrode, applying a second pulse to a second electrode after the application of the first pulse, and applying a falling ramp pulse to the first electrode after the application of the second pulse.Type: GrantFiled: March 21, 2006Date of Patent: October 25, 2011Assignee: LG Electronics Inc.Inventors: Kyoung Jin Jung, Ki Duck Cho, Sung Im Lee, Min Soo Kim
-
Patent number: 8044886Abstract: The present invention relates to a plasma display apparatus and, more particularly, to a method of driving a plasma display panel. The plasma display apparatus includes a plasma display panel including a plurality of scan electrodes and sustain electrodes formed on an upper substrate, and a plurality of address electrodes formed on a lower substrate, and a driver for supplying driving signals to the plurality of electrodes. The plurality of scan electrodes are divided into first and second groups and then supplied with scan signals, and scan bias voltages supplied to the first and second groups in at least any one period of an address period are different from each other. In at least one of a plurality of subfields constituting one frame, a width of a first sustain signal of a plurality of sustain signals supplied during a sustain period is larger than a width of each of the remaining sustain signals.Type: GrantFiled: April 10, 2008Date of Patent: October 25, 2011Assignee: LG Electronics Inc.Inventors: Yoon Chang Choi, Dong Soo Lee, Byoung Gun Kim, Seong Ho Kang, Kyung Ryeol Shim
-
Patent number: 8044887Abstract: The present invention relates to a method of driving a plasma display panel and a plasma display apparatus employing the same. In the plasma display apparatus, a plurality of scan electrodes formed in a plasma display panel are divided into first and second groups and then supplied with scan signals. When a scan bias voltage supplied in a first subfield of first and second subfields is higher than that supplied in a second subfield of the first and second subfields, a lowest voltage of a reset signal supplied in the second subfield is higher than that supplied in the first subfield. In accordance with the plasma display apparatus of the present invention, the lowest voltage of the reset signal is controlled according to the scan bias voltage in dividing the plurality of scan electrodes into two or more groups and driving them.Type: GrantFiled: April 10, 2008Date of Patent: October 25, 2011Assignee: LG Electronics Inc.Inventors: Yoon Chang Choi, Won Jae Kim, Hyung Jae Kim, Seong Ho Kang, Kyung Ryeol Shim
-
Patent number: 8044889Abstract: There is provided a plasma display device. The plasma display device includes a plasma display panel (PDP) and drivers for supplying driving signals to the PDP. The driver includes a capacitor, a first switch turned on in order to supply a voltage of a first end of both ends of the capacitor to the PDP, a second switch turned on in order to supply a voltage of a second end of both ends of the capacitor to the PDP, a first voltage supplier connected to the first end of the capacitor to supply one of a sustain voltage and a reference voltage to the first end, and a second voltage supplier connected to the second end of the capacitor to supply the reference voltage to the second end. A voltage difference between the both ends of the capacitor is sustained as the sustain voltage.Type: GrantFiled: December 26, 2007Date of Patent: October 25, 2011Assignee: LG Electronics Inc.Inventors: Eun Joo Hwang, Byung Ho Rhee, Byeong Uk Lee, Jae Won Shim, Mi Ok Kim, Yong Song, Takeshi Kuwahara
-
Patent number: 8044884Abstract: A plasma display apparatus comprises a driver for supplying a rising signal of finite slope and a scan signal of negative polarity to a scan electrode using one voltage source. The driver also supplies a falling signal to the scan electrode using the same voltage source. This apparatus may be used to perform a panel driving method that includes applying a rising signal, which rises from a first voltage to a second voltage, to the scan electrode during a reset period and applying a scan signal, of a magnitude at least substantially the same as a difference between the first voltage and the second voltage, to the scan electrode during an address period.Type: GrantFiled: June 6, 2006Date of Patent: October 25, 2011Assignee: LG Electronics Inc.Inventors: Yun Kwon Jung, Hyun Jae Lim, Sung Kwang Cho
-
Patent number: 8044885Abstract: A driving device of a plasma display panel for performing a reset period using a ramp pulse. The driving device changes the lowest potential of the ramp down pulse in response to temperature change in order to prevent or reduce low discharge or over-discharge due to the temperature change. The amount of wall charges in the pixels are maintained substantially constant over a temperature range to provide an optimal discharge condition, making it possible to prevent the discharge error and perform the low voltage address operation, in the address period.Type: GrantFiled: February 22, 2008Date of Patent: October 25, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Hak-ki Choi
-
Patent number: 8040296Abstract: In one embodiment, a plasma display device includes: a plasma display panel having a plurality of electrodes; a power supply including first and second power sources for respectively supplying first and second voltages, the second voltage being higher than the first voltage; a driving circuit for driving the electrodes; and a controller for generating a first signal to control the driving circuit. The driving circuit includes: a first switch for supplying a third voltage to the electrodes, the third voltage decreasing over a period of time; a switching controller for controlling the first switch in accordance with the first signal and a second signal; and a feedback signal generator for comparing fourth and fifth voltages respectively proportional to the third and second voltages, adjusting a level of the second signal according to a result of comparing the fourth and fifth voltages, and supplying the second signal to the switching controller.Type: GrantFiled: November 14, 2007Date of Patent: October 18, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Sang-Gu Lee
-
Patent number: 8040295Abstract: In a PDP apparatus provided with a PDP having (X, Y, A) and various drivers, two adjacent Ys in a plurality of Ys are commonly connected by a wiring so as to form one set unit, in the vicinity of a connection portion of the PDP and the drivers. A two-stage reset and address operation control using a reset operation including an address disable operation is used for a control unit including a plurality of display lines (L) of the set units. In a plurality of Ls as objects of drive display, the reset and address operation of first Ls (Lo) corresponding to Ys on one side of set units and that of second Ls (Le) corresponding to Ys on the other side thereof are performed separately in former and latter periods, and then, sustain operations of the first and second Ls on both sides are performed simultaneously.Type: GrantFiled: February 7, 2007Date of Patent: October 18, 2011Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Akihiro Takagi, Tetsuya Sakamoto, Takashi Shiizaki
-
Patent number: 8040294Abstract: A plasma display apparatus includes: an electrode of a discharge cell; a first transistor having a first terminal and a second terminal, the second terminal being connected to the electrode; a first capacitor having a first terminal to receive a control signal having either a low level voltage or a high level voltage; a push-pull circuit including a first power terminal, a second power terminal connected to the first terminal of the first transistor, an input terminal connected to a second terminal of the first capacitor, and an output terminal connected to a gate of the first transistor, the push-pull circuit outputting either a voltage of the first power terminal or a voltage of the second power terminal to the output terminal; a floating power source having a positive terminal connected to the first power terminal and a negative terminal connected to the second power terminal; and a first diode connected between the first terminal of the first transistor and the second terminal of the first capacitor.Type: GrantFiled: November 16, 2007Date of Patent: October 18, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Suk-Ki Kim
-
Patent number: 8035880Abstract: In a reflective a display device based on layer break up or layer displacement having at least two different states, in which one of the fluids (5) e.g. oil in a first state adjoins at least a first support plate (3) and in the second state the other fluid (6) at least partly adjoins the first support plate, in which picture elements are separated by areas (13) having a hydrophilic surface dyes (or sometimes pigments) are added to the oil (usually hydrocarbon but also possibly silicone or fluorocarbon), to provide sufficient optical intensity.Type: GrantFiled: May 21, 2010Date of Patent: October 11, 2011Assignee: Liquavista, B.V.Inventors: Robert A. Hayes, Mickael Joulaud, Thibault J B Roques-Carmes, Stephanie A. Palmier
-
Patent number: 8035578Abstract: A display apparatus, which displays a color image by controlling the number of emissions or the intensity thereof in accordance with primary color video signals input thereto, has a detection portion and a white balance correction portion. The detection portion is used to detect the number of emissions or the intensity, and the white balance correction portion is used to correct white balance by adjusting the amplitudes of the primary color video signals in accordance with the detected number of emissions or the detected intensity. Therefore, correct white balance can be maintained regardless of the number of emissions or the intensity of emission.Type: GrantFiled: October 31, 2007Date of Patent: October 11, 2011Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Ken Kumakura, Hideaki Ohki, Yuichiro Kimura, Yasuji Noguchi, Takayuki Ooe
-
Patent number: 8031136Abstract: A plasma display apparatus, and more particularly, a driving method and improved structure of a plasma display apparatus are provided. A sustain signal that alternates between a positive polarity and a negative polarity is supplied to only one electrode. Therefore, it can facilitate the adoption of an integrated driving board. Furthermore, a voltage magnitude of a set-up signal supplying in any one of the remaining sub-fields other than a first sub-field of a frame is less than the voltage magnitude of the set-up signal supplying in the first sub-field. It is therefore possible to increase the contrast.Type: GrantFiled: May 9, 2006Date of Patent: October 4, 2011Assignee: LG Electronics Inc.Inventors: Janghwan Cho, Yang Keun Lee
-
Patent number: 8031135Abstract: The present invention relates to a plasma display apparatus and driving method thereof, in which an afterimage occurring when the plasma display panel is turned on can be obviated and an erroneous discharge phenomenon and damage to elements can be prevented. A plasma display apparatus according to an aspect of the present invention comprises a plasma display panel including a scan electrode and a sustain electrode, and a controller for applying a sustain pulse, which is the first applied pulse, to the scan electrode and the sustain electrode for a predetermined time after the plasma display panel is turned on. The present invention is advantageous in that it can obviate an afterimage occurring when a plasma display panel is turned on and can prevent an erroneous discharge phenomenon and damage to elements by improving a driving apparatus of the plasma display panel.Type: GrantFiled: November 17, 2005Date of Patent: October 4, 2011Assignee: LG Electronics Inc.Inventors: Moonshick Chung, Youngseop Moon
-
Patent number: 8031134Abstract: In the initializing period of each of sub-fields comprising one field, one of all-cell initializing operation and selective initializing operation is performed. The all-cell initializing operation causes initializing discharge in all the discharge cells for displaying an image. The selective initializing operation selectively causes initializing discharge only in the discharge cells subjected to sustaining discharge in the preceding sub-field. Provided in the all-cell initializing period is an abnormal charge erasing part in which application of a rectangular waveform voltage to the scan electrodes causes self-erasing discharge in the discharge cells having excessive wall voltage accumulated therein.Type: GrantFiled: May 13, 2005Date of Patent: October 4, 2011Assignee: Panasonic CorporationInventors: Kenji Ogawa, Shigeo Kigo, Minoru Takeda
-
Patent number: 8031138Abstract: A plasma display panel and a plasma display apparatus are disclosed. The plasma display panel includes a front substrate including a scan electrode and a sustain electrode positioned parallel to each other, an upper dielectric layer positioned on the scan and sustain electrodes, a rear substrate on which an address electrode is positioned to intersect the scan and sustain electrodes, a lower dielectric layer positioned on the address electrode, a barrier rib positioned between the front substrate and the rear substrate to partition a discharge cell, and a phosphor layer positioned inside the discharge cell. The upper dielectric layer includes a glass-based material and a blue pigment. The phosphor layer includes a phosphor material and MgO material.Type: GrantFiled: October 31, 2007Date of Patent: October 4, 2011Assignee: LG Electronics Inc.Inventors: Heekwon Kim, Woochan Cho, Yoonseok Kwak, Byunghyun Kim
-
Patent number: 8031137Abstract: When a current frame of a video expresses only grayscales less than a reference grayscale, a sustain pulse applying period and a holding period are alternately provided in a sustain period of at least one subfield having a weight greater than a reference weight in all of the discharge cells of a plasma display panel, thereby reducing power consumption in the plasma display panel. In the sustain pulse applying period, sustain pulses alternately having a first voltage and a second voltage less than the first voltage are applied in opposite phases to first electrodes and second electrodes of the plasma display panel. In the holding period, the first electrodes and/or the second electrodes are maintained at the first voltage.Type: GrantFiled: July 12, 2007Date of Patent: October 4, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Tae-Kyoung Kang
-
Patent number: 8026869Abstract: A plasma display driving method and apparatus that can reduce the occurrences of dropout, on a displayed image, caused by misaddress when the environment temperature becomes low. In the inventive plasma display, the environment temperature is determined, and during a charge adjustment interval, the ultimate voltage, which the drive waveform of a scan electrode voltage reaches at the end after continuously varying in the negative direction, is changed in accordance with the determined environment temperature in such a manner that if the environment temperature becomes lower, the ultimate voltage is directed in the positive direction.Type: GrantFiled: June 20, 2005Date of Patent: September 27, 2011Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Akihiro Takagi, Takashi Sasaki, Akira Otsuka
-
Patent number: 8026870Abstract: A plasma display apparatus comprises a plasma display panel, a temperature detector and driver. The plasma display panel comprises a plurality of first electrodes and a plurality of second electrodes formed in parallel to each other. The temperature detector for detecting a temperature of the plasma display panel to output a temperature information signal. The driver which receives the temperature information signal from the temperature detector, and if the temperature of the plasma display panel is lower than a reference temperature, clamps a first sustain signal, which is supplied to at least one of the first electrodes and second electrodes, at a first clamping time, and if the temperature of the plasma display panel is higher than the reference temperature, clamps a second sustain signal, which is supplied to at least one of the first electrodes and the second electrodes, at a second clamping time different from the first clamping time.Type: GrantFiled: October 12, 2007Date of Patent: September 27, 2011Assignee: LG Electronics Inc.Inventor: Soongkyu Lee
-
Patent number: 8026907Abstract: A plasma display device includes plasma display panel and a data driver. 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. 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 data electrodes. Data electrodes have a plurality of main electrode parts provided in portions facing the display electrodes, and wiring parts that connect main electrode parts together and have a width smaller than the widths of main electrode parts. The widths of main electrode parts in a peripheral portion of plasma display panel are larger than the widths of main electrode parts in a central portion thereof.Type: GrantFiled: February 27, 2007Date of Patent: September 27, 2011Assignee: Panasonic CorporationInventors: Tetsuya Shirai, Katsutoshi Shindo
-
Patent number: 8026867Abstract: The present invention relates to a plasma display device and a method of driving the plasma display device. A gradually rising waveform and then a falling waveform are applied to the scan electrodes. A rising waveform has a slope different from that of a rising waveform applied in a first sub-field in at least one of sub-fields posterior to the first sub-field.Type: GrantFiled: January 13, 2006Date of Patent: September 27, 2011Assignee: LG Electronics Inc.Inventors: Yun Kwon Jung, Jong Sik Lim
-
Patent number: 8026868Abstract: A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plurality of scan electrodes, a plurality of data electrodes, a scan driver and a data driver. The scan driver scans the plurality of scan electrodes during an address period in one scanning type of a plurality of scanning types having different scanning orders. Further, the scan driver supplies a scan signal, of which the duration of a voltage rising period is different from the duration of a voltage falling period, to the scan electrodes when scanning the scan electrodes. The data driver supplies a data signal to the data electrodes depending on the scanning type selected from the plurality of scanning types.Type: GrantFiled: August 30, 2006Date of Patent: September 27, 2011Assignee: LG Electronics Inc.Inventors: Jongwoon Bae, Kirack Park, Seonghwan Ryu, Yoonjoo Cho, Dooyong Hwang
-
Publication number: 20110227954Abstract: The driving method of the plasma display device has a plurality of combination sets for display that includes a different number of combinations. The signal levels of a red image signal, a green image signal, and a blue image signal are compared with each other. For an image signal of a color that has a low signal level, a combination set for display is used where the number of combinations is smaller than that in the combination set for display used for an image signal of a color that has a high signal level.Type: ApplicationFiled: December 7, 2009Publication date: September 22, 2011Applicant: Panasonic CorporationInventor: Kazuhiro Yamada
-
Patent number: 8022897Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.Type: GrantFiled: August 21, 2007Date of Patent: September 20, 2011Assignee: Hitachi Plasma Licensing Co., Ltd.Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
-
Publication number: 20110221728Abstract: Having a low-cost transparent electrode, the plasma display panel suppresses variations in discharge characteristics between discharge cells and provides high quality image. To attain above, a scan bus electrode is formed so as to constitute an outer periphery in the lengthwise direction of a scan electrode and have a clearance inside, similarly, a sustain bus electrode is formed so as to constitute an outer periphery in the lengthwise direction of a sustain electrode and have a clearance inside. Besides, a scan transparent electrode is formed in the clearance of the scan bus electrode with use of a dispersion liquid containing particles of metal or particles of metal oxide, similarly, a sustain transparent electrode is formed in the clearance of the sustain bus electrode with use of a dispersion liquid containing particles of metal or particles of metal oxide.Type: ApplicationFiled: July 3, 2009Publication date: September 15, 2011Inventors: Yasuhisa Ishikura, Eiichi Uriu, Ryota Hamada, Tomohiro Murakoso
-
Patent number: 8018347Abstract: A device for integrating and indicating a parameter over, comprising: a first electrode (2), a second electrode (3), an electrolyte (5), which is in contact with the first electrode and in consuming contact with a consumption portion (6) of the second electrode, at least two indicators (I1, I2, I3), which are connected to the consumption portion (6) at a respective connecting point (P1, P2, P3). The electrolyte (5) and the consumption portion (6) are selected such that when a voltage is applied over the electrodes (2, 3), the consumption portion (6) is consumed at a predetermined rate, wherein the indicators (I1, I2, I3) are arranged to switch states in response to a consumption frontier (F1, F2) of the consumption portion reaching or passing a connecting point (P1, P2, P3) associated with the respective indicator (I1, I2, I3), wherein at least one of the indicators is a binary (on/off) indicator.Type: GrantFiled: May 5, 2009Date of Patent: September 13, 2011Assignee: Acreo ABInventors: Payman Tehrani, Mats Robertsson, David Nilsson, Oscar Larsson, Nathaniel D. Robinson, Rune Groppfeldt
-
Patent number: 8018168Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.Type: GrantFiled: August 21, 2007Date of Patent: September 13, 2011Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
-
Patent number: 8018167Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.Type: GrantFiled: August 21, 2007Date of Patent: September 13, 2011Assignee: Hitachi Plasma Licensing Co., Ltd.Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
-
Patent number: 8018400Abstract: A plasma display device (PDP) and method of driving it (during an address period) are provided. Such a PDP has an address electrode for receiving an address pulse and a capacitor. Such an address pulse has states including a first voltage and a smaller second voltage smaller. Such a capacitor stores a third voltage that is between the first and third voltages. Such a method includes: coupling the capacitor to the address electrode via the inductor; firstly energizing, via the inductor, the address electrode with the third voltage stored in the capacitor; secondly energizing the address electrode with the first voltage; thirdly energizing, via the inductor, the capacitor with voltage on the address electrode; and fourthly energizing the address electrode with the second voltage. Real power transfer during the first and third energizations is facilitated via reactive power transfer arising from LC resonance.Type: GrantFiled: October 25, 2007Date of Patent: September 13, 2011Assignee: Samsung SDI Co., Ltd.Inventors: Myoung-Kwan Kim, Jae-Seok Jeong
-
Patent number: 8018154Abstract: A PDP can be driven at low voltage while having a charge retention property in a protection layer, and has favorable image display properties. Additionally, the PDP prevents the occurrence of discharge delay and realizes high-quality image display by performing favorable high-speed driving in a high definition PDP. To achieve this, a surface layer (8) is formed to a film thickness of 1 ?m in an oxygen atmosphere having an oxygen partial pressure of 0.025 Pa or more, the surface layer (8) is provided on a face of a dielectric layer (7) on a discharge space side. Furthermore, MgO particles (16) are dispersed on a surface of the surface layer (8). The surface layer (8) has the effects of protecting the dielectric layer (7) from ion bombardment during discharge, reducing the firing voltage, and preventing excessive electron loss. Also, the MgO particles (16) have a high initial electron emission property.Type: GrantFiled: April 27, 2007Date of Patent: September 13, 2011Assignee: Panasonic CorporationInventors: Yusuke Fukui, Takuji Tsujita, Jun Hashimoto, Hikaru Nishitani, Masaharu Terauchi, Mikihiko Nishitani
-
Publication number: 20110216108Abstract: Display luminance is uniformized to enhance image display quality. A sustain pulse generating circuit generates sustain pulses by selecting any one of a plurality of driving patterns, according to an all-cell light-emitting rate and a partial light-emitting rate. A loading correction part of the image signal processing circuit includes: number of lit cells calculator for calculating the number of discharge cells to be lit in each display electrode pair, in each subfield; load value calculator for calculating a load value of each discharge cell, according to the calculation result in number of lit cells calculator; correction gain calculator for calculating a correction gain of each discharge cell, according the calculation result in load value calculator, the driving pattern selected, and the position of the discharge cell; and corrector for correcting an input image signal, according to the output from correction gain calculator.Type: ApplicationFiled: November 12, 2009Publication date: September 8, 2011Applicant: Panasonic CorporationInventors: Takahiko Origuchi, Tomoyuki Saito
-
Patent number: 8013808Abstract: A panel driving method has, in one filed time period, an all-cell initializing subfield for causing initializing discharge in all discharge cells for displaying an image in the initializing period, and a selection initializing subfield for selectively causing initializing discharge in the discharge cell that has caused sustaining discharge in the last subfield in the initializing period. The number of all-cell initializing subfields can be increased and decreased, and the initializing voltage for causing initializing discharge in the all-cell initializing subfield can be varied. At least one of the number of all-cell initializing subfields and the initializing voltage of the all-cell initializing subfields in one field is controlled based on the accumulation of the panel power-on time.Type: GrantFiled: February 20, 2007Date of Patent: September 6, 2011Assignee: Panasonic CorporationInventors: Minoru Takeda, Shigeo Kigo, Takeru Yamashita, Tooru Kawase
-
Patent number: 8013807Abstract: A display apparatus includes a plasma display panel (PDP) having an upper substrate at which black matrices are disposed. The apparatus includes an external light shield having a panel side facing a display surface of the PDP and an opposing viewer side facing away from the display surface. The light shield includes a base unit and includes pattern units that absorb external light from the viewer side. The pattern units have boundaries defined by intersections of the pattern units and the base unit. The boundaries define widths of pattern tops disposed toward the panel side or the viewer side and define widths of pattern bottoms disposed toward the other of the panel side and the viewer side. A distance between a pair of adjacent black matrices is 4 to 12 times greater than a distance between adjacent boundaries, of a pair of adjacent pattern units, at adjacent pattern bottoms.Type: GrantFiled: September 14, 2007Date of Patent: September 6, 2011Assignee: LG Electronics Inc.Inventors: Hong Rae Cha, Ji Hoon Sohn, Sam Je Cho, Woo Sung Jang, Woon Seo Shin
-
Publication number: 20110210992Abstract: The image display quality is improved by uniforming the display luminance. For that purpose, the plasma display device has a plasma display panel, and image signal processing circuit. Image signal processing circuit includes loading correcting section. Section includes number-of-lit-cells calculating section for calculating the number of discharge cells to be lit for each display electrode pair in each subfield, load value calculating section for calculating the load value of each discharge cell based on the calculation result by number-of-lit-cells calculating section, correction gain calculating section for calculating the correction gain of each discharge cell based on the calculation result by load value calculating section and the positions of the discharge cells, and correcting section for subtracting, from an input image signal, the result derived by multiplying the input image signal by the output from correction gain calculating section.Type: ApplicationFiled: November 11, 2009Publication date: September 1, 2011Applicant: PANASONIC CORPORATIONInventors: Tomoyuki Saito, Takahiko Origuchi
-
Publication number: 20110210991Abstract: Display luminance is uniformized and the brightness is enhanced. A plasma display device has image signal processing circuit including loading correction part. The loading correction part has: number of lit cells calculator for calculating the number of discharge cells to be lit in each display electrode pair, in each subfield; load value calculator for calculating a load value of each discharge cell, according to the calculation result in number of lit cells calculator; correction gain calculator for calculating a correction gain of each discharge cell, according to the position of the discharge cell and the calculation result in load value calculator, such that the correction gain is smaller in the central portion than in the peripheral portion on the plasma display panel's image display surface; and corrector for subtracting the multiplication result of the output from correction gain calculator and an input image signal, from the input image signal.Type: ApplicationFiled: November 12, 2009Publication date: September 1, 2011Applicant: Panasonic CorporationInventors: Takahiko Origuchi, Mitsuo Ueda
-
Patent number: 8009154Abstract: A plasma display device to generate a stable reset discharge and to reduce background luminance and a method of driving the same. The plasma display device produces images by dividing the frames of displayed images into a plurality of sub-fields, which include a reset period, an address period, and a sustain period. The method includes: supplying a first main reset pulse in the reset period of ith frames (where, i is natural number); and supplying second and third main reset pulses in reset periods of (i+1)th frames, which are alternatively produced with the ith frames. The first main reset pulse having a different voltage than the second and third main reset pulses.Type: GrantFiled: August 8, 2007Date of Patent: August 30, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Sungsu Lee
-
Patent number: 8009124Abstract: A plasma display and a driving method for the plasma display. The plasma display is constructed with a control type plasma display panel having a closed barrier rib configuration, and each pair of column-wise neighboring discharge cells have different electrode arrangement. In the driving method, when the control type plasma display panel has an alignment error for a first electrode and a second electrode, a scan pulse having a first width is applied to an odd-numbered first electrode, and the scan pulse having a second width that is different from the first width is applied to an even-numbered first electrode.Type: GrantFiled: November 9, 2007Date of Patent: August 30, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Tae-Hyun Kim
-
Patent number: 8009122Abstract: A plasma display device includes a plasma display panel provided with plural discharge cells each having discharge gas, a pair of sustain electrodes which generate sustain discharge, and a phosphor, and a driving circuit which applies a sustain pulse voltage between the pair of sustain electrodes for generating the sustain discharge. The sustain pulse voltage is formed of a first portion having a main portion of a first voltage Vp and a second portion succeeding the first portion in time and having a main portion of a second voltage Vs higher than the first voltage Vp, the sustain discharge is formed of a pre-discharge and a main discharge succeeding the pre-discharge in time, and the first voltage Vp is selected to satisfy Vpmin?Vp<Vs, where Vpmin is a minimum of the first voltage Vp which stabilizes the sustain discharge.Type: GrantFiled: August 31, 2006Date of Patent: August 30, 2011Assignee: Hiachi, Ltd.Inventors: Kenichi Yamamoto, Keizo Suzuki
-
Patent number: 8004476Abstract: A technique capable of suppressing or preventing generation of flickers (blinks) by a sustain period control as well as capable of ensuring or enhancing display quality in a PDP device. The PDP device adjusts a sustain pulse of the sustain period for every subfield by selecting a combination of one or more than one cycle so that start and end timings of a field in fields before and after change are almost the same according to a display load ratio of the subfield of the field. Field weighted emission center positions then becomes almost the same, and flickers and the like are suppressed.Type: GrantFiled: December 20, 2007Date of Patent: August 23, 2011Assignee: Hitachi, Ltd.Inventors: Masanori Takeuchi, Toshio Ueda
-
Patent number: 7999767Abstract: There is disclosed a method and apparatus of driving a plasma display panel that is adaptive for improving its contrast and enabling its high speed driving. A driving method of a plasma display panel according to an embodiment of the present invention applies a setup voltage with a first gradient to the scan electrode for the reset period; and applies the setup voltage with a second gradient to the sustain electrode while a voltage on the scan electrode rises.Type: GrantFiled: November 27, 2007Date of Patent: August 16, 2011Assignee: LG Electronics Inc.Inventors: Yun Kwon Jung, Jin Young Kim
-
Patent number: 7999764Abstract: A plasma display apparatus comprises a plasma display panel and a first driver. The plasma display panel includes a first electrode and a second electrode. The first driver includes an inductor into which a current flows in a first direction before and after a voltage between the first electrode and the second electrode rises from a negative polarity sustain voltage and into which a current flows in a second direction different from the first direction before and after the voltage between the first electrode and the second electrode falls from a positive polarity sustain voltage.Type: GrantFiled: September 12, 2007Date of Patent: August 16, 2011Assignee: LG Electronics Inc.Inventor: Janghwan Cho