Particular Discharge Path Patents (Class 345/66)
  • Patent number: 9019177
    Abstract: An image is placed, based on a predetermined designation input, on a predetermined placement position in relation to a display area, and displayed. The image is enlarged and reduced in accordance with an enlargement ratio of the image, and an area within which the placement position can be set is changed in relation to the display area in accordance with the enlargement ratio. Then, based on an obtained designation input, a position within the area, which position corresponds to the designation input, is calculated as a placement position, and the image having been enlarged and reduced is placed on the placement position. The image is then displayed on a display device.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: April 28, 2015
    Assignee: Nintendo Co., Ltd.
    Inventors: Yoshikazu Yamashita, Keiichi Minato
  • Patent number: 8466853
    Abstract: A driving method of a plasma display device according to an exemplary embodiment groups a plurality of address electrodes extending in a first direction into a plurality of groups, and logically divides each of the groups into a plurality of sub-groups. During a first period, a first pulse is sequentially applied to the plurality of groups, and a second pulse is sequentially applied to the plurality of sub-groups included in at least one of the plurality of groups during a second period following the first period. The first and second periods are address periods for sensing in a second direction crossing the first direction.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: June 18, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Tae-Yong Song, Suk-Jae Park, Woo-Joon Chung
  • Patent number: 8436822
    Abstract: A touch panel has a panel capacitor, a first capacitor, and a second capacitor. The panel capacitor and the first capacitor are charged and discharged cyclically according to a first phase signal and a second phase signal, such that an input voltage associated with the panel capacitor and the first capacitor is applied to a control circuit. The control circuit charges and discharges a second capacitor based on the input voltage and a reference voltage to compensate the difference between the input voltage and the reference voltage. The capacitance of the panel capacitor could be calculated based on the frequency of charging and discharging the second capacitor.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: May 7, 2013
    Assignee: Himax Technologies Limited
    Inventors: Yaw-Guang Chang, Chin-Feng Hsu
  • Patent number: 8416155
    Abstract: Provided is a technique of a PDP device capable of preventing error display arising from changes in discharge characteristics in a reset period particularly due to a long-period operation. In the PDP device, a slope of a slope waveform in the reset period is changed corresponding to operation time of the PDP device. And, the slope waveform is made to have a configuration having a stepwise plurality of slopes in a predetermined reset period. For example, when the operation time becomes long, rising and falling slope waveforms of a reset waveform are configured by two steps, and a first slope thereof is made steeper than a slope before the change, and a second slope is made gentle than the slope before the change. When the operation become longer, the first slope is made further steeper and the subsequent second slope is made further gentler.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: April 9, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuya Kaminaka, Takashi Shiizaki, Takashi Sasaki, Hirohito Kuriyama
  • Patent number: 8410998
    Abstract: The present invention relates to a device for driving a plasma display panel having a plurality of cells arranged in rows and columns, said device comprising row address means for selectively addressing the display cell rows and creating, where required, in cooperation with means for selectively applying data voltages to the display columns, an electrical discharge inside the cell disposed at the intersection of the row and column selected during an address phase, and sustain means (I3, I4, I5, I6) for sustaining the electrical discharges inside said cell during a sustain phase immediately following the address phase. According to the invention, the row address means and/or the sustain means are capable of allowing a bi-directional current to flow in the display cells during the address and/or sustain phases. The capacitive and light-emission currents appearing during these phases can thus flow freely and do not create electromagnetic interference.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: April 2, 2013
    Assignee: Thomson Licensing
    Inventors: Jean-Raphael Bezal, GĂ©rard Rilly, Philippe Zorzan
  • Patent number: 8373622
    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: January 19, 2012
    Date of Patent: February 12, 2013
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Kazushige Takagi, Tadayoshi Kosaka
  • Patent number: 8362977
    Abstract: A method of driving a plasma display is disclosed. In one embodiment, the method includes dividing one screen into a plurality of areas, wherein each area corresponds to at least one of the plurality of discharge cells, and wherein the plurality of areas form a detection pattern. The method also includes displaying the detection pattern in the plasma display and receiving a detection image which has been previously detected or captured, wherein detection image corresponds to at least one of the plurality of areas. The method further includes comparing the received detection image with the detection pattern and determining a position of the detected or captured area based on the comparison.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: January 29, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Kyong-Won Kim, Hak-Cheol Yang, Sung-Chun Cho
  • Patent number: 8350784
    Abstract: In a plasma display panel, abnormal discharge in address periods is suppressed to enhance image display quality. The scan electrode driving circuit generates a first falling down-ramp voltage i.e. down-ramp voltage L2 or down-ramp voltage L4, in initializing periods, generates sustain pulses in sustain periods, generates a rising up-ramp voltage, i.e. erasing up-ramp voltage L3, at the ends of the sustain periods, and applies the voltages to the scan electrodes. After generating the sustain pulses in the sustain periods, the scan electrode driving circuit generates a second down-ramp voltage, i.e. erasing down-ramp voltage L5, which has a portion falling with a gradient gentler than that of down-ramp voltage L2 and down-ramp voltage L4. After generating erasing down-ramp voltage L5, the scan electrode driving circuit generates erasing up-ramp voltage L3 and applies the voltage to the scan electrodes.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: January 8, 2013
    Assignee: Panasonic Corporation
    Inventors: Naoyuki Tomioka, Naoki Noguchi
  • Patent number: 8345028
    Abstract: A driving circuit applied in an electronic display apparatus is provided. The driving circuit includes a first exchange circuit and a first buffer. The first buffer includes first and second input stages, a second exchange circuit and first and second output stages. The first exchange circuit selectively couples a first input signal and a first output signal outputted from the first output stage to one of the first and the second input stages; and selectively couples a second input signal and a second output signal outputted from the second output stage to the other of the first and the second input stages. The second exchange circuit selectively couples the first input stage to one of the first and the second output stages and selectively couples the second input stage to the other of the first and the second output stages.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: January 1, 2013
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chih-Chuan Huang, Yu-Lung Lo, Hsin-Yeh Wu
  • Patent number: 8334820
    Abstract: A plasma display panel is disclosed. The plasma display panel includes a scan electrode and a sustain electrode positioned parallel to each other on a front substrate, an upper dielectric layer positioned on the scan electrode and the sustain electrode, a rear substrate on which an address electrode is positioned to intersect the scan electrode and the sustain electrode, a lower dielectric layer positioned on the address electrode, and a barrier rib positioned between the front substrate and the rear substrate. The barrier rib includes lead (Pb) equal to or less than 1,000 ppm (parts per million). A discharge gas is filled between the front substrate and the rear substrate and includes helium (He) of 9% to 42%.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: December 18, 2012
    Assignee: LG Electronics Inc.
    Inventors: Seongnam Ryu, Gibum Lee, Jongmun Yang, Jain Goo, Hyeonjae Lee, Jinyoung Kim, Jeonghyun Hahm, Myongsoon Jung, Jihoon Lee
  • Patent number: 8319705
    Abstract: The plasma display device has a display panel having first and second display electrodes and address electrodes, an electrode drive circuit, and a drive control circuit for controlling the electrode drive circuit. The drive control circuit performs a reset drive control, address drive control and sustain drive control in each subfield. The drive control circuit performs an all cell reset drive control which resets all cells in a first subfield out of the plurality of subfields, and an ON cell reset drive control which resets ON cells in a second subfield. At a first temperature T1, an ultimate potential of an slope pulse of the first display electrode is controlled to be a first potential in the ON cell reset drive control, and at a second temperature T2>T1, the ultimate potential is controlled to be a second potential higher than the first potential.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: November 27, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Junichi Kumagai, Katsumi Ito
  • Patent number: 8304997
    Abstract: An energy recovery circuit for a plasma display panel (PDP) according to the present invention includes an energy recovery unit recovering and storing energy from the PDP; and a switching stabilizing unit electrically connected to the energy recovery unit to stabilize switching of a sustain discharge pulse applied to the PDP. The switching stabilization unit may include one diode, two switches and one capacitor for energy recovery, or include two switches and an external input voltage source that is an external voltage supply. According to the present invention, the difference of voltages applied to both drain and source terminals of a switch (SW2) for applying a sustain discharge voltage (Vsus) is minimized at the time when the switch (SW2) is switched, so that switching can be stabilized by preventing hard switching from being generated when the sustain discharge voltage is applied to a panel.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: November 6, 2012
    Assignee: Orion Co., Ltd.
    Inventors: Yong Duk Kim, Young Jun Lee, Su Sam Choi
  • Patent number: 8253658
    Abstract: A plasma display apparatus is disclosed. The plasma display apparatus a plasma display panel including a front substrate on which a scan electrode and a sustain electrode are positioned parallel to each other, a rear substrate on which an address electrode is positioned to cross the scan electrode and the sustain electrode, and a barrier rib that is positioned between the front substrate and the rear substrate to partition a discharge cell and a driver supplying a sustain signal to the scan electrode and the sustain electrode in a sustain period of at least one of a plurality of subfields of a frame. A sustain signal supplied to the scan electrode overlaps a sustain signal supplied to the sustain electrode in the sustain period. The address electrode is electrically floated in the sustain period.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: August 28, 2012
    Assignee: LG Electronics Inc.
    Inventors: Sangyoon Soh, Mukhee Kim, Yunkwon Jung
  • Patent number: 8207912
    Abstract: Sustain pulses are alternately applied to a pair of display electrodes of discharge cells provided in a plasma display panel (PDP) to generate a sustain discharge to display an image on the PDP. The sustain pulses include two-crests discharge voltage waveforms having a first maximum and second maximum values, in which discharges are generated twice in a half cycle. After applying a sustain pulse having a one-crest discharge voltage waveform to a pair of display electrodes, a predetermined number of sustain pulses of two-crests discharge voltage waveforms are consecutively applied. A time, from applying a second sustain pulse of a two-crests discharge voltage waveform to clamping a voltage of the second sustain pulse to the second maximum value, is made longer than a time, from applying a first sustain pulse of a two-crests discharge voltage waveform to clamping a voltage of the first sustain pulse to the second maximum value.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: June 26, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Naoki Itokawa, Katsumi Ito, Masaki Kimura, Junichi Kumagai, Yasunobu Hashimoto, Tomokatsu Kishi
  • Patent number: 8207911
    Abstract: A display device includes two or more plasma tube array units to provide a large sized screen. Each plasma tube array unit includes pairs of scan and sustain electrodes. The plasma tube array units are disposed adjacent to each other in a longitudinal direction of the scan and sustain electrodes. One scan driver which selectively applies a scan signal to the scan electrodes is coupled to the two adjacent plasma tube array units at a position between the two adjacent plasma tube array units. Two sustain voltage drivers which apply respective sustain voltage to the sustain electrodes are coupled to the sustain electrodes of the two respective adjacent plasma tube array units on two respective outermost sides of the two respective adjacent plasma tube array units.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: June 26, 2012
    Assignee: Shinoda Plasma Co., Ltd.
    Inventors: Manabu Ishimoto, Hitoshi Hirakawa, Kenji Awamoto
  • Patent number: 8174522
    Abstract: A three-dimensional (3D) structure data creation technique capable of readily creating 3D structure data is disclosed. This method is for producing data of a 3D structure which is made up of a plurality of elements. The method includes the steps of preparing first and second two-dimensional (2D) sectional images different in normal vector from each other, forming first and second unit graphics based on these 2D images, partitioning each unit graphic on a per-element basis, performing layout arrangement of two unit graphics in accordance with normal vectors, expanding these unit graphics for conversion to 3D objects, and allocating a selected element to a region in which elements of the unit graphics failing to coincide with each other, which region is included in and specified from those regions with intersection of respective partitioned parts of the unit graphics, thereby to create the 3D structure data required.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: May 8, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroshi Watanabe
  • Patent number: 8149184
    Abstract: The initial color temperature setting can change when a plasma display panel (PDP) is driven for a long period of time. One cause is due to the non-uniform deterioration of red, green, and blue fluorescent materials due to the ultraviolet rays discharged during operation of the panel. Color temperature correction is performed by setting the numbers of discharge pulses for fluorescent materials in accordance with a discharge pulse number correction curve with respect to the cumulative elapsed driven time of the PDP.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: April 3, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Hidenao Kubota, Hirofumi Sakamoto, Masahiko Umeda, Masatoshi Sudo
  • 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: 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: 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: 8054248
    Abstract: 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: Grant
    Filed: December 18, 2007
    Date of Patent: November 8, 2011
    Assignee: LG Electronics Inc.
    Inventors: Moon Shick Chung, Jeong Pil Choi
  • Patent number: 8049433
    Abstract: Disclosed is an inverter circuit. The inverter circuit comprises a transformer comprising a primary coil and a secondary coil wound at a predetermined turn ratio, a first switch circuit comprising first and second switch devices commonly connected with a first end of the primary coil of the transformer, a second switch circuit comprising third and fourth switch devices commonly connected with a second end of the primary coil of the transformer, and a third switch circuit comprising fifth and sixth switch devices commonly connected with a part of the primary coil of the transformer.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: November 1, 2011
    Assignee: LG Innotek Co., Ltd.
    Inventor: Jae Hyun Han
  • Patent number: 8044888
    Abstract: 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: Grant
    Filed: February 13, 2009
    Date of Patent: October 25, 2011
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Seiki Kuroki, Nguyen Thanh Nhan
  • Patent number: 8035578
    Abstract: 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: Grant
    Filed: October 31, 2007
    Date of Patent: October 11, 2011
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Ken Kumakura, Hideaki Ohki, Yuichiro Kimura, Yasuji Noguchi, Takayuki Ooe
  • Patent number: 8031138
    Abstract: 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: Grant
    Filed: October 31, 2007
    Date of Patent: October 4, 2011
    Assignee: LG Electronics Inc.
    Inventors: Heekwon Kim, Woochan Cho, Yoonseok Kwak, Byunghyun Kim
  • Patent number: 8013808
    Abstract: 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: Grant
    Filed: February 20, 2007
    Date of Patent: September 6, 2011
    Assignee: Panasonic Corporation
    Inventors: Minoru Takeda, Shigeo Kigo, Takeru Yamashita, Tooru Kawase
  • Patent number: 7973741
    Abstract: When a discharge start voltage takes a normal value under the normal temperature, priming discharge starts at a time t1. In this case, at a time t3 that is later than the time t1 by a predetermined time t, a sustain driver control signal Ssud2 is raised to put a sustain electrode into the floating state to stop the priming discharge. When the discharge start voltage takes a higher value than usual under the high temperature, the priming discharge starts at a time t2. In this case, at a time t4 that is later than the time t2 by the predetermined time t, the sustain driver control signal Ssud2 is lowered to put the sustain electrode into the floating state to stop the priming discharge. With such a configuration, provided is a plasma display device capable of implementing excellent and stable display quality while maintaining constant, even if a discharge start voltage varies, the charge state in display cells after a priming period, and a drive method for such a plasma display device.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: July 5, 2011
    Assignee: Panasonic Corporation
    Inventors: Shinya Tsuchida, Shinji Hirakawa, Mitsuhiro Ishizuka, Koji Hashimoto, Hajime Homma
  • Patent number: 7940232
    Abstract: A driving method includes generating an address discharge in selected cells out of discharge cells and setting the selected cells to either an emission enable state or a non-emission state in an address period which is set in each subfield period. The driving method also includes generating sustaining discharge in discharge cells being set to the emission enable state by applying at least one discharge sustaining pulse P+ between a scanning electrode and a common electrode constituting each row electrode pair, in a discharge sustaining period following the address period. The driving method also includes decreasing the applied voltage between the scanning electrode and common electrode in steps when a final applied pulse P+ out of the discharge sustaining pulses falls.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: May 10, 2011
    Assignee: Panasonic Corporation
    Inventors: Takashi Mashita, Hajime Homma
  • Patent number: 7924240
    Abstract: Disclosed therein is an apparatus for driving a plasma display panel, with a simple structure.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: April 12, 2011
    Assignee: LG Electronics Inc.
    Inventors: Jeong Pil Choi, Seong Hee Park
  • Patent number: 7911418
    Abstract: A method and device for driving a plasma display panel are provided that do not cause false lighting even if the all-cell initializing operation becomes unstable. In an initializing period of a subfield, an all-cell initializing operation of causing initializing discharge in all discharge cells or a selective initializing operation of causing initializing discharge in the discharge cell that has caused sustain discharge in the last sustain period is performed. In a field corresponding to an image signal for displaying black on the whole screen, an abnormal charge erasing period for applying rectangular waveform voltage to the scan electrode is disposed after the initializing period in the subfield where the all-cell initializing operation is firstly performed.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: March 22, 2011
    Assignee: Panasonic Corporation
    Inventors: Yutaka Yoshihama, Shigeo Kigo
  • Patent number: 7903105
    Abstract: Methods and apparatus to improve efficiency in cold cathode fluorescent light (CCFL) controllers using a full bridge resonant implementation. The secondary of a transformer drives the CCFL, with the primary of the transformer being driven through a capacitor from a full bridge. The bridge alternately and repetitively connects the capacitor and primary between power supply connections, across one of the power supply connections, between the power supply connections with an alternate polarity and again across one of the power supply connections. Instead of switching from across one of the power supply connections to between the power supply connections when the primary current is near zero, a delay is intentionally imposed before switching. This significantly improves the operating efficiency of a backlighting system. In preferred embodiments, the delay is made power supply voltage dependent.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: March 8, 2011
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Rayleigh Lan, Calum MacRae
  • Patent number: 7872615
    Abstract: An apparatus for driving a plasma display panel includes a first driver and a second driver and a first power supplier and a second power supplier for generating sustain discharge pulses having no negative (?) level. The first driver includes a first capacitor charged to a first voltage and is coupled to a power source for supplying a voltage Vs and a ground voltage. The first driver, coupled to one terminal of a panel capacitor, operates to alternately apply double the voltage Vs formed by the power source and the first capacitor and the ground voltage to the one terminal of the panel capacitor. The second power supplier, coupled to the power source and the ground voltage, includes a second capacitor charged to Vs. The second driver coupled to the other terminal of the panel capacitor operates to alternately apply double the voltage Vs formed by the power source and the second capacitor and the ground voltage to the other terminal of the panel capacitor.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: January 18, 2011
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jun-Young Lee, Dae-Gyu Kim
  • Patent number: 7859486
    Abstract: An ambient light sensing circuit includes a transistor, a first storage capacitor coupled to the transistor and adapted to compensate for a threshold voltage of the transistor, a second storage capacitor coupled to the first storage capacitor, a photodiode coupled to the first storage capacitor and the second storage capacitor and adapted to change a coupling voltage of the first and second storage capacitors based on ambient light incident thereon, a first switch adapted to selectively apply the first power supply voltage to the output load coupled to the transistor, and a second switch coupled to a first electrode of the transistor and the output load, and adapted to allow a charge stored in the storage capacitor to be discharged through the transistor based on the coupling voltage of the first storage capacitor and the second storage capacitor.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: December 28, 2010
    Assignees: Samsung Mobile Display Co., Ltd., IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventor: Ohkyong Kwon
  • Publication number: 20100315393
    Abstract: A plasma display device with improved heat dissipation performance of a driver integrated circuit is disclosed. In one embodiment, the plasma display device includes i) plasma display panel configured to display an image, iii) a printed circuit board assembly, iii) a flexible printed circuit configured to electrically connect the printed circuit board assembly to the plasma display panel, wherein the flexible printed circuit comprises a metal layer and iv) a driver integrated circuit mounted in the flexible printed circuit and configured to control an electrode formed in the plasma display panel. The driver integrated circuit comprises: i) a base, ii) a plurality of output terminals connected to the base, and iii) a heat-conducting layer contacting 1) at least one of the plurality of output terminals and 2) the metal layer of the flexible printed circuit, wherein the heat-conducting layer and the metal layer are at least partially embedded in the flexible printed circuit.
    Type: Application
    Filed: February 25, 2010
    Publication date: December 16, 2010
    Applicant: Samsung SDI Co., Ltd.
    Inventor: Tae-Kyoung KANG
  • Patent number: 7852289
    Abstract: A PDP driving circuit is comprised of a power recovery unit for recovering an electric power from a capacitive load by resonance operation with PDP which is the capacitive load Cp, and reusing the recovered power. The power recovery unit includes a recovery inductor for resonating with the capacitive load, a recovery switch element for connecting the recovery capacitor to the capacitive load and recovery inductor, and forming a channel for passing resonance current, a counterflow preventive diode for blocking flow of current in the recovery switch element in reverse polarity direction, and a protective diode for forming a closed current channel including the recovery inductor and recovery switch element when the counterflow preventive diode is changed from ON state to OFF state.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: December 14, 2010
    Assignee: Panasonic Corporation
    Inventors: Yasuhiro Arai, Manabu Inoue, Toshikazu Nagaki
  • Publication number: 20100231486
    Abstract: A plasma arc tube display is fabricated by arranging a plurality of arc tubes having fluorescent substance layers on the inside and filled with a discharge gas, joining a front substrate and a rear substrate having electrodes to both surfaces of these arranged arc tubes, and interconnecting a plurality of plasma arc tube modules having frames facing the rear substrate with the flexible front substrate interposed therebetween to connect the electrodes installed on the front substrate to each other. Since the plasma arc tube modules can be folded, the plasma arc tube display can be easily transported even if it has a large-sized screen.
    Type: Application
    Filed: March 9, 2006
    Publication date: September 16, 2010
    Applicant: SHINODA PLASAMA CORPORATION
    Inventors: Kenji Awamoto, Manabu Ishimoto, Hitoshi Hirakawa, Koji Shinohe, Yosuke Yamazaki
  • Patent number: 7773050
    Abstract: To provide an AC-PDP capable of achieving low power consumption and low cost, a driving method is adopted in which, during a period of sustaining light emission of the AC-PDP, an electrode of one side of the panel is fixed at a predetermined potential, and positive and negative voltages are alternately applied to an electrode of the other side of the panel. In addition, an IGBT is used as a switch element. Thus, with a half-bridge driving method using an IGBT as a switch element, it is possible to simultaneously achieve a reduction in loss of a driving circuit of the AC-PDP and a reduction in the number of components thereof, such reductions not being able to be achieved by the conventional techniques.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: August 10, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Takuo Nagase, Mutsuhiro Mori
  • Patent number: 7773052
    Abstract: There is provided a plasma display device including a slope waveform generating circuit which supplies to an electrode a slope waveform of which voltage changes with the lapse of time, the electrode being formed in a capacitive load to serves as a display element in a display panel for displaying images, wherein the slope waveform generating circuit includes: a plurality of power supplies which supply different voltages; and a switching circuit which selects one power supply out of the a plurality of power supplies and supplies a voltage to the electrode, wherein the switching circuit switches the power supply, which supplies a voltage to the electrode, in accordance with a voltage being supplied to the electrode.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: August 10, 2010
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Masaki Kamada, Takashi Shiizaki
  • Patent number: 7768478
    Abstract: A plasma display apparatus is disclosed. The plasma display apparatus includes a plasma display panel including a first electrode and a second electrode connected to a reference voltage source, a negative voltage controller that supplies a negative voltage output from a negative constant voltage source to the first electrode, a sustain driver, and a negative voltage blocking unit. The sustain driver supplies a sustain signal to the first electrode, and one terminal of the sustain driver is connected to one terminal of the negative voltage controller. The negative voltage blocking unit prevents the negative voltage from being supplied to the reference voltage source through the sustain driver while the negative voltage controller supplies the negative voltage to the first electrode.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: August 3, 2010
    Assignee: LG Electronics Inc.
    Inventors: Janghwan Cho, Hyunil Park, Changjoon Park, Sunghwan Kim
  • Patent number: RE41817
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: October 12, 2010
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
  • Patent number: RE41832
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: October 19, 2010
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
  • Patent number: RE41872
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: October 26, 2010
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
  • 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
  • Patent number: RE43267
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: March 27, 2012
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
  • Patent number: RE43268
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: March 27, 2012
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
  • Patent number: RE43269
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: March 27, 2012
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
  • Patent number: RE44003
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: February 19, 2013
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
  • Patent number: RE44757
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: February 11, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa
  • Patent number: RE45167
    Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: September 30, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Yasunobu Hashimoto, Yasushi Yoneda, Kenji Awamoto, Seiichi Iwasa