Gas Discharge Display Segments (e.g., Plasma) Patents (Class 345/37)
  • Patent number: 11112695
    Abstract: Provided are a photosensitive composition with which a cured film having excellent heat resistance and pattern formability can be formed, a cured film, an optical filter, a solid image pickup element, an image display device, and an infrared sensor. This photosensitive composition includes an infrared shielding agent A, a polymer component B, and a photoacid generator C. The polymer component B in the photosensitive composition includes, for example, a polymer B1 that includes a repeating unit b1 having a group in which at least one group selected from an acid group or a hydroxyl group is protected by an acid-decomposable group and a repeating unit b2 having a crosslinking group.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: September 7, 2021
    Assignee: FUJIFILM Corporation
    Inventor: Kyohei Arayama
  • Patent number: 10269312
    Abstract: A display panel driving apparatus includes a data driving part and a gate driving part. The data driving part is configured to convert image data into a data signal and output the data signal to a data line of a display panel. The gate driving part is configured to output, to a gate line of the display panel, a gate signal having different gate on voltages during a first sub-frame period of a frame period and a second sub-frame period subsequent to the first sub-frame period. Thus, display quality of a display apparatus may be improved.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: April 23, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: In-Jae Hwang, Hyun-Joon Kim
  • Patent number: 10261309
    Abstract: A liquid lens chip, a driving apparatus and a driving method thereof are provided. The driving apparatus includes a carrier and a driver. The carrier is configured to carry a liquid lens and has a plurality of electrode pairs in contact with the liquid lens. The driver provides a periodic first driving signal to a selected electrode pair of the electrode pairs during a first time period according to a scan control signal to change a shape of the liquid lens. The driver further provides a periodic second driving signal to an opposite electrode pair opposite to the selected electrode pair during a second time period to recover the shape of the liquid lens which has been changed during the first time period.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 16, 2019
    Assignee: National Tsing Hua University
    Inventors: Fan-Gang Tseng, Pen-Cheng Wang, Po-Wei Hu, Hsien-Lung Ho
  • Patent number: 9733522
    Abstract: The present disclosure provides a liquid crystal display device and a method for manufacturing the same. The device includes: a first substrate; a second substrate spaced apart from and opposite to the first substrate; a first lower alignment layer formed on an upper surface of the first substrate; a first upper alignment layer formed on a lower surface of the second substrate; a second alignment layer formed in an array on either or both of an upper surface of the first lower alignment layer and a lower surface of the first upper alignment layer; a polymer barrier positioned between the first substrate and the second substrate, the polymer barrier formed on the array of the second alignment layer; and a liquid crystal positioned between the polymer barriers.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: August 15, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: Wonjin Choi, Sejin Jang
  • Patent number: 9568758
    Abstract: A display apparatus according to the present invention has a gasket attached in a space between a flexible print cable on which an electrically insulating coating is formed, the flexible print cable connecting the circuit board of a display panel and a connecting substrate connected to an external electric device, and a frame supporting a display unit including the display panel, the connecting substrate, and the flexible print cable. The gasket is provided with a core portion made of non-metal and having elasticity, and a surface portion made of metal disposed on a periphery of the core portion. By this means, unnecessary radiation noise generated from the flexible print cable connecting the display panel to the external electric device is effectively shielded without machining the display panel.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: February 14, 2017
    Assignee: DENSO CORPORATION
    Inventor: Isamu Suzuki
  • Patent number: 9461629
    Abstract: A circuit for generating a voltage waveform at an output node. The circuit includes a voltage rail connected to the output node via a voltage rail switch; an anchor node connected to the output node via an inductor and a bidirectional switch, wherein the bidirectional switch includes two or more transistors connected in series; and a control unit configured to change the voltage at the output node by controlling the voltage rail switch and the bidirectional switch so that, if a load capacitance is connected to the output node, a resonant circuit is established between the inductor and the load capacitance. The circuit may be included in an apparatus for use in processing charged particles, e.g. for use in performing mass spectrometry or ion mobility spectrometry.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: October 4, 2016
    Assignee: SHIMADZU CORPORATION
    Inventors: Steven Douglas Taylor, Matthew Clive Gill, Li Ding, James Edward Nuttall
  • Patent number: 8786578
    Abstract: A pointing device and a display apparatus applying the same are provided. The pointing device corrects an error that occurs in a boundary between block in calculating a current location of the pointing device and calculates the current location. Accordingly, an error occurring in a boundary between blocks in calculating a current location of the pointing device is prevented.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: July 22, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byung-seok Soh, Sang-on Choi, Yong-wan Choi, Mi-ra Yu
  • Patent number: 8558816
    Abstract: A plasma display device that enables a reduction of costs in implementing a touch panel function using infrared rays generated when displaying an image, which are emitted in a substantially uniform dispersion from a display area. One embodiment includes a plasma display panel (PDP) for displaying the image and a pair of infrared sensor cameras at two corners of the PDP. The infrared sensor cameras are either on the front or rear side of the PDP, and are utilized to detect changes in the amount of infrared rays emitted from the PDP. A controller determines a position where the amount of infrared rays is changed, which corresponds to a touch position, and transmits a detection signal indicating the location of the change in the amount of infrared rays. The infrared sensor camera has a lens with a view angle in the range of 90° to 180°.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: October 15, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Yu-Jeong Cho, Seong-Gi Choo
  • Patent number: 8456384
    Abstract: A plasma display device is disclosed. The plasma display device includes a plasma display panel (PDP), a printed circuit board assembly (PBA), and a flexible printed circuit (FPC) electrically connecting electrodes of the PBA and the PDP. In some embodiments, the FPC is formed of two films with signal lines therebetween and electrodes on opposite sides.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: June 4, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Yong-Jin Kim
  • Patent number: 8451288
    Abstract: The present invention relates to an image signal processing apparatus capable of reproducing the appearance of an image that is displayed on a PDP. In an image processing unit 1, as a process for an image signal so that an image obtained when the image signal is displayed on a display apparatus of a display type other than that of a PDP can look like an image displayed on a PDP display apparatus, at least one of reproducing color shift caused by a moving image which is produced because lighting of RGB is turned on in this order, reproducing a dither pattern to be applied in a space direction, reproducing a dither pattern to be applied in a time direction, reproducing a space between pixel pitches, and reproducing a stripe array is performed. The present invention can be applied to a case where, for example, an image that can look like an image displayed on a PDP is to be displayed on an LCD.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: May 28, 2013
    Assignee: Sony Corporation
    Inventors: Tetsujiro Kondo, Tomohiro Yasuoka
  • Patent number: 8395645
    Abstract: Crosstalk between adjacent discharge cells is reduced for a stable sustain discharge. A plasma display panel has scan electrodes and sustain electrodes arranged so that the positions of the corresponding scan electrode and sustain electrode are alternately interchanged in each display electrode pair, and image signal processing circuit converts an image signal into image data indicating light emission and no light emission in each discharge cell in each subfield. The image signal processing circuit generates the image data so that a combination of image data is avoided. One of two adjacent discharge cells having side-by-side scan electrodes is lit and the other of the discharge cells is unlit in one subfield of a plurality of subfields forming one field, and the one of the discharge cells is unlit and the other of the discharge cells is lit in a subfield after the one subfield in the same field.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: March 12, 2013
    Assignee: Panasonic Corporation
    Inventors: Takahiko Origuchi, Hidehiko Shoji, Kazuhiro Yamada
  • Patent number: 8362976
    Abstract: A plasma display device that can utilize an energy recovery voltage regardless of whether pixels are selected. An energy recovery circuit of the plasma display device includes first and second switches serially coupled between a first voltage source and a second voltage source, a third switch coupled to a connection point between the first and second switches, a voltage recovery capacitor coupled between the third switch and a base voltage source, and a precharger for charging the voltage recovery capacitor.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: January 29, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Sang-Gu Lee
  • Patent number: 8243443
    Abstract: A filter 101 of the present application has flexibility. The filter 101 includes a left protruding portion 102, a right protruding portion 103, a lower protruding portion 104a, a lower protruding portion 104b, and an upper protruding portion 105. The electronic equipment of the present application includes a main portion 2 and a display portion 3. The display portion 3 includes a left groove 11a, a right groove 11b, a lower groove 12a, and a lower groove 12b. The left protruding portion 102 can be inserted in the left groove 11a. The right protruding portion 103 can be inserted in the right groove 11b. The lower protruding portion 104a can be inserted in the lower groove 12a. The lower protruding portion 104b can be inserted in the lower groove 12b. When the filter 101 is mounted on the display portion 3, the upper protruding portion 105 is positioned on the display frame 9.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: August 14, 2012
    Assignee: Panasonic Corporation
    Inventors: Shintaro Tanaka, Akira Iwamoto
  • Patent number: 8203507
    Abstract: A drive method of a plasma display panel that can increase the dark contrast, without causing a discharge failure. When a discharge cell that assumes a black display state in a first field from among first and a second fields that are adjacent in time and switches to a display state representing a brightness other than black in the second field is detected as a lighting transition cell, at least one drive of the below-described first and second forced lighting drives is executed. In the first forced lighting drive, the lighting transition cell is forcibly set into the lighting mode only in the address process of a predetermined subfield within the field in the first field. In the second forced lighting drive, an adjacent discharge cell that is adjacent to the lighting transition cell is forcibly set into the lighting mode only in the address process of the predetermined subfield in the second field.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: June 19, 2012
    Assignee: Panasonic Corporation
    Inventors: Shunsuke Itakura, Mitsuhiro Ishizuka, Kazuo Yahagi, Tetsuya Shigeta, Hirofumi Honda
  • Patent number: 8174544
    Abstract: Previously, image display apparatuses using phosphors each having a different persistence time have a problem of reducing a motion blur caused by persistence of the phosphors in an image and improving color shift caused by the motion blur. To overcome this problem, an image display apparatus (1) includes: a motion detecting unit (2) calculating motion information from an inputted image signal, such as a region, a velocity, a direction of a motion, and a matching difference; a correction signal calculating unit (3) calculating a correction signal for correcting the motion blur caused by persistence in the inputted image signal, using the motion information; and a correcting unit (4) correcting the input image signal using the calculated correction signal.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: May 8, 2012
    Assignee: Panasonic Corporation
    Inventors: Daisuke Sato, Yusuke Monobe
  • Patent number: 8159487
    Abstract: A plasma display device includes a scan electrode drive circuit including a sustain pulse generating circuit, which includes an electric power recovery capacitor, a first recovery switch and a first recovery inductor connected in series so as to form an electric current passage in which an electric current is allowed to flow from the electric power recovery capacitor to a scan electrode, a second recovery switch and a second recovery inductor connected in series so as to form an electric current passage in which an electric current is allowed to flow from the scan electrode to the electric power recovery capacitor, a first damper capacitor connected to a node between a diode of the first recovery switch and the first recovery inductor, and a second damper capacitor connected to a node between a diode of the second recovery switch and the second recovery inductor.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: April 17, 2012
    Assignee: Panasonic Corporation
    Inventors: Fumito Kusama, Masaaki Kuranuki, Hironori Konno
  • Patent number: 8138993
    Abstract: The control of a plasma display panel, successively comprises, at least for all the cells of a current line having to switch state for the next line: a connection of a terminal of application of an intermediary supply voltage to output terminals of column control stages corresponding to the junction points of first and second switches between two terminals of application of a supply voltage, to perform a precharge or a predischarge of the screen cells; a disconnection of said output terminals from this intermediary voltage; and a connection of each output terminal to a first or to a second power supply voltage by the turning-on of the first or second switch of the corresponding stage, according to a luminance reference value, delayed with respect to the disconnection of the corresponding output terminal from the terminal of application of the intermediary voltage.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: March 20, 2012
    Assignee: STMicroelectronics SA
    Inventors: Jerome Bourgoin, Gilles Troussel
  • Patent number: 8120602
    Abstract: The plasma display panel device according to the present invention includes a the data driver that includes a data IC applying a driving signal to at least one address electrode and a data driver applying a driving data signal to the data IC to reduce EMI and ensure timing margin according to high rate switching operations of the plural switches included in the data IC, wherein the data driver generates a first synchronization signal if N?1th data is different from Nth data and maintains and applies the first synchronization signal to the data IC if the Nth data is different from N+1th data.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: February 21, 2012
    Assignee: LG Electronics Inc.
    Inventors: Ok Hwan Kwon, Jong Ki Kim, Jun Bae Park
  • Patent number: 8054245
    Abstract: 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: Grant
    Filed: June 12, 2006
    Date of Patent: November 8, 2011
    Assignee: LG Electronics Inc.
    Inventors: Won Jae Kim, Sung Im Lee
  • Patent number: 7944409
    Abstract: A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plasma display panel in which a plurality of scan electrodes, sustain electrodes, and address electrodes are formed on substrates to form a discharge cell and electrode driving parts for driving the scan electrodes, the sustain electrodes, and the address electrodes. The plurality of scan electrodes are divided into a plurality of scan electrode groups and the driving parts are controlled such that a voltage different from a scan bias voltage is applied for a predetermined time in the address period of one or more scan electrode groups among the plurality of scan electrode groups.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: May 17, 2011
    Assignee: LG Electronics Inc.
    Inventor: Jeong Pil Choi
  • Patent number: 7830337
    Abstract: The present invention provides a driving method of a plasma display panel with ADS method comprising a reset period including an erase period, a rising period and a falling period, an address period and a sustain period, in which an auxiliary electrode is inserted between a scan electrode and a sustain electrode which are disposed in parallel on a front substrate, while an address electrode is disposed on a rear substrate facing the front substrate, wherein an erase pulse which rises from a first voltage to a second voltage is applied to the auxiliary electrode in the erase period. According to the present invention, the reset driving method is used in a four electrode AC PDP for a high efficiency, in which the reset discharge is stabilized by lowering the reset voltage, thereby, the address discharge is stabilized. Thus, the four electrode AC PDP having a high efficiency can be stably drived. The plasma display panel using the method uses a low reset voltage, so that the power consumption is reduced.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: November 9, 2010
    Assignee: Korean Advanced Institute of Science and Technology (KAIST)
    Inventors: Kyung Cheol Choi, Jin Bhum Yun
  • Patent number: 7804465
    Abstract: A plasma display apparatus comprises a plasma display panel and a driver. The plasma display panel comprises a first electrode, a second electrode, and a third electrode crossing the first electrode and the second electrode. During a first frame, the driver alternately supplies a sustain signal to the first electrode and the second electrode and supplies a constant voltage to the third electrode. During a second frame having a smaller APL of the first frame, the driver alternately supplies a sustain signal to the first electrode and the second electrode and supplies an auxiliary signal to the third electrode so as to correspond to at least one sustain signal of the sustain signals supplied to the first electrode and the second electrode.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: September 28, 2010
    Assignee: LG Electronics Inc.
    Inventors: Won Jae Kim, Min Seok Choi
  • Patent number: 7659871
    Abstract: Provided are a plasma display panel (PDP) and a driving method thereof. The PDP includes a first substrate and a second substrate disposed in parallel and spaced apart from one another. Address electrodes are provided on the first substrate with a first dielectric layer over the address electrodes and the first substrate. Barrier ribs are provided on the dielectric forming a plurality of discharge spaces in which phosphor layers are provided. Sustain electrodes are formed on the second substrate facing the first substrate and are arranged crossing the address electrodes. A second dielectric layer is formed over the address electrodes and on the second substrate, and a protective layer including MgO of at least 99.6% purity by weight is formed over the second dielectric layer by a sintering process.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: February 9, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ki-Dong Kim, Yong-Su Park
  • Patent number: 7649317
    Abstract: A plasma display device having an improved electrode structure that is capable of improving a contrast of the plasma display panel while decreasing a discharge firing voltage is provided. A plasma display panel according to an embodiment of the invention includes first and second substrates disposed opposite to each other, barrier ribs arranged in a space between the first substrate and the second substrate to define at least one discharge cell, address electrodes formed along a first direction, and display electrodes formed along a second direction intersecting the first direction. The display electrodes include bus electrodes formed extending in the second direction, expansion electrodes that extend toward the center of each discharge cell from the bus electrodes and face each other in the discharge cell with a discharge gap interposed therebetween, and auxiliary electrodes located at front ends of the expansion electrodes opposite to each other.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: January 19, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hoon-Young Choi, Min Hur, Young-Do Choi, Yon-Goo Park
  • Patent number: 7626335
    Abstract: The plasma display apparatus includes a first electrode and a second electrode formed on an upper substrate, and a barrier rib. The second electrode is arranged in parallel with the first electrode. The barrier rib is formed on a lower substrate opposite to the upper substrate to divide a discharge space. The first electrode and the second electrode are respectively protruded toward the discharge space to have a predetermined thickness. A discharge occurs between the first electrode and the second electrodes opposite to the first electrode. Since the margin of static characteristics increases, the voltage range in which stable driving is possible increase and the amount of the consumption of the discharge current decreases, to thereby reducing power consumption, and enhancing the luminous efficiency and the efficiency of the plasma discharge.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: December 1, 2009
    Assignee: LG Electronics Inc.
    Inventors: Chung Hoo Park, Jung Woo Ok, Ho Jun Lee
  • Patent number: 7626334
    Abstract: A plasma display panel includes a first substrate and a second substrate that partially define a plurality of discharge cells in a space therebetween, and an electrode structure including an address electrode extending along a first direction, a dielectric layer formed on the address electrode, a first electrode extending along a second direction intersecting the first direction, and a second electrode extending along the second direction intersecting the first direction, where the first electrode and the second electrode are electrically insulated from the address electrode, and at least a portion of each of the first electrode and the second electrode is associated with each of the discharge cells. At least one of the address electrode and the dielectric layer associated with each of the discharge cells may include a first portion and a second portion.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: December 1, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Min Hur, Jae-Yong Lim
  • Patent number: 7612741
    Abstract: When driving a plasma display panel, in a first subfield of a first frame, turn-on cells are selected among cells of a first group of electrodes by performing an address operation for the first group, and a sustain discharge is performed for selected cells, and turn-on cells are selected among cells of a second group of electrodes by performing an address operation for the second group, and a sustain discharge is performed for selected cells. In a first subfield of a second frame, turn-on cells are selected among cells of the second group by performing an address operation for the second group, and a sustain discharge is performed for selected cells, and turn-on cells are selected among cells of the first group by performing an address operation for the first group, and a sustain discharge is performed for selected cells.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: November 3, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Dae-Hwan Kim
  • Patent number: 7602353
    Abstract: Method comprising a succession of image frames which each comprise a sustain phase of the display discharge regions which itself comprises the application of sustain voltage pulses VS between the electrodes of each pair crossing these regions, and, during each sustain pulse, the application of trigger voltage pulses VM to groups of discharge regions, which pulses are applied successively and not simultaneously to the various groups of discharge regions. Thanks to the application in stages of the trigger pulses during each sustain pulse, a reduction in the instantaneous current required to supply the display is obtained.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: October 13, 2009
    Assignee: Thomson Licensing
    Inventors: Ana Lacoste, Dominique Gagnot, Pascal Denoyelle
  • Patent number: 7586404
    Abstract: Providing a display apparatus with a structure suitable to support a ring-shaped member for three-dimensional effect to express information for recognition of a partial area of a display area of a display unit by surrounding the partial area with the ring-shaped member arranged in front of the display area so as to be movable linearly along the display area, the ring-shaped member is supported at the top side and the bottom side of the rear edge in a top-bottom direction along the display area and perpendicular to a direction of the linear motion, by each mount piece of the supporting member. Front portions of the mount pieces located in front of the display area are completely covered by the facing plate located between the front portions and the front large diameter portion of the ring-shaped member.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: September 8, 2009
    Assignee: Yazaki Corporation
    Inventors: Hideaki Kageyama, Yoshiyuki Furuya, Hiroyuki Yokota, Satoshi Saotome
  • Patent number: 7573200
    Abstract: An object of the present invention is to reduce power consumption in a plasma display panel (PDP) by reducing the discharge firing voltage, while suppressing the occurrence of discharge variability when the PDP is driven, as well as ensuring the wall-charge holding performance of a protective film surface. To achieve this, a front panel of a PDP of the present invention has a catalyst layer dispersed on a surface of display electrodes formed in stripes on one side of a glass substrate, and needle crystals composed of graphite formed to stand upright on the catalyst layer. The needle crystals form a phase-separated structure with the materials of a dielectric film and a protective film.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: August 11, 2009
    Assignee: Panasonic Corporation
    Inventors: Shinichi Yamamoto, Mikihiko Nishitani, Yukihiro Morita
  • Patent number: 7567227
    Abstract: To provide a novel driving method for driving an electronic device by using digital gray scale and time gray scale in combination, which secures high duty ratio, which can display an image normally even when a sustain period is shorter than an address period, and which is hardly affected by dulled signal waveform. In a sub-frame period (102) where a sustain period is shorter than an address period, a clear period (105) is squeezed in between completion of a sustain period (104) and start of an address period of the subsequent sub-frame period. The length of the sustain period (104) thus can be set without being limited by the length of an address period (103). This non-display period is provided by changing the electric potential of a storage capacitor line. Therefore, unlike the case where the non-display period is provided by changing the electric potential of a cathode wiring, the present invention is hardly affected by dulled signal waveform.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: July 28, 2009
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hajime Kimura, Yoshifumi Tanada
  • Patent number: 7545345
    Abstract: A plasma display panel and a driving method thereof. In the plasma display panel, Y electrodes are divided into a plurality of groups according to a scanning order and a final reset voltage is established to be different for each group. The plasma display panel includes a panel including a plurality of first electrodes and second electrodes, a plurality of selection circuits that are respectively coupled to the plurality of the first electrodes, and a driving circuit coupled to the second terminals of the selection circuits. The driving circuit includes a transistor which allows the voltage at the first electrodes to be reduced in a ramp style in a reset period.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: June 9, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-Sung Kim, Seung-Hun Chae, Jin-Ho Yang
  • Patent number: 7525512
    Abstract: An improved method of testing and inspecting a plasma display panel. In a plasma display panel, a plurality of cells are formed at an intersection of each electrode disposed in a row direction and in a column direction of the panel. A field is formed of a plurality of sub-fields, and the combination of the sub-fields enables the panel to have a gradation display. In the inspection method, an address pulse voltage is not applied to a target cell to be inspected in a predetermined sub-field, but is applied to at least one cell of the cells adjacent to the target cell, and the address pulse voltage is applied to the target cell in the successive sub-field. If the barrier ribs of the target cell have an imperfection, wall charges of the cell are affected by the discharge occurred in an adjacent cell, and the target cell fails to light on in the successive sub-field. The inspection method can thus detect lighting failure caused by defective barrier ribs.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: April 28, 2009
    Assignee: Panasonic Corporation
    Inventors: Tsuneo Ikura, Takao Wakitani
  • Patent number: 7515117
    Abstract: Provided is a driving method for a plasma display panel capable of prolonging a life span of the plasma display panel and improving luminous efficiency thereof by preventing an accumulation of positive charges on an address electrode of the plasma display panel. For the purpose in the present invention, voltage pulses having different polarities and sizes are applied to a pair of sustain electrodes of a plasma display panel while sustaining a discharge for the plasma display panel.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: April 7, 2009
    Assignee: LG Electronics Inc.
    Inventor: Seong-Hak Moon
  • Patent number: 7505014
    Abstract: The present invention relates to an apparatus for driving a plasma display panel, and more particularly, to an apparatus for driving a plasma display panel including a scan driver. According to an embodiment of the present invention, an apparatus for driving a plasma display panel includes one switching device to apply a scan pulse per one Y-electrode wherein the switching device is turned on to apply the scan pulse to the selected Y-electrode and wherein other switching devices are turned off. By performing scan and sustain processes using one switching device only, the present invention reduces the costs and the volume of the scan driver. Specifically, by turning on the switching device corresponding to the selected channel only and by turning off the switching devices corresponding to other channels, the present invention minimizes power consumption.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: March 17, 2009
    Assignee: LG Electronics, Inc.
    Inventor: Seong Hak Moon
  • Patent number: 7486260
    Abstract: A driving apparatus of a plasma display panel (PDP) and a method for displaying pictures on the plasma display panel, which are capable of increasing the ability to express a low gray scale. Common non-emitted sub-fields are detected, using picture signal data having the maximum level of the gray scale, of all input picture signal data within one frame of the input picture signal data. Sub-fields having higher weights are divided into a plurality of sub-fields having lower weights and the plurality of sub-fields having lower weights are rearranged as sub-fields for expression of gray scale, corresponding to the number of non-emitted sub-fields. In addition, the number of sustains corresponding to the rearranged sub-fields are generated.
    Type: Grant
    Filed: November 3, 2004
    Date of Patent: February 3, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Soo-Jin Lee
  • Patent number: 7450087
    Abstract: A rear substrate of plasma display panel comprises a substrate, a plurality of address electrodes, a plurality of auxiliary address electrodes, a rib and a fluorescent layer. The rib is disposed on the substrate to define a plurality of discharge spaces. Each of the address electrodes is disposed in each of the discharge spaces. The auxiliary address electrodes are disposed between the substrate and the rib. When an address signal is inputted to the address electrodes, the auxiliary address electrodes are grounded for reducing the probability of error discharge. During sustain period, the auxiliary address electrodes are coupled to a positive voltage for preventing ion bombardment of phosphors layer.
    Type: Grant
    Filed: September 25, 2004
    Date of Patent: November 11, 2008
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chao-Hung Hsu, Yu-Ting Chien
  • Patent number: 7425934
    Abstract: A display-panel-drive apparatus having a drive unit that drives the display panel and a control unit that outputs control signals for controlling said drive unit to said drive unit, the display-panel-drive apparatus is provided with: a drive board of the drive unit; a control board of the control unit; a transmission line that transmits the control signals from the control board to the drive board by way of a removable connector; a detection device that detects when said connector is disconnected; and a control device that controls said drive unit when the detection device detects that the connector is disconnected; and wherein the detection device detects that said connector is disconnected by detecting when the connection terminals of the connector are disconnected.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: September 16, 2008
    Assignee: Pioneer Corporation
    Inventors: Yuuki Masumura, Yukihiro Matsumoto
  • Patent number: 7425935
    Abstract: An apparagraph and method of driving a plasma display panel that enables the display of an image wherein contour noise is minimized and that prevents flickering mal-discharge and mis-discharge when the plasma display panel is being driven at high/low temperature is provided. The method includes detecting a drive temperature of a panel, mapping data using a first sub-field pattern mapping when the panel is driven at a low temperature or a high temperature, and mapping the data using a second sub-field pattern mapping different from the first sub-field pattern mapping when the panel is driven at a temperature between the low temperature and the high temperature.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: September 16, 2008
    Assignee: LG Electronics, Inc.
    Inventors: Young Dae Kim, Soo Seok Sim
  • Patent number: 7423611
    Abstract: A method of driving a display device has a calculating step, a comparing step, and a controlling step. The calculating step calculates a total number of light-emission pulses within a field, based on an average of display load factors in at least two fields, the comparing step compares the calculated number of light-emission pulses with a number of light-emission pulses based on power consumption, and the controlling step controls a smaller display load factor as the total number of light-emission pulses within a field.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: September 9, 2008
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Takayuki Ooe, Toshio Ueda, Kosaku Toda
  • Patent number: 7423864
    Abstract: A plasma display device comprises a plasma display panel, a chassis base for supporting the plasma display panel, and a circuit board assembly mounted on the chassis base with circuit elements for applying electrical signals required for driving the plasma display panel. The chassis base is bent with a curvature such that the curvature of the chassis base compensates for a curvature of the bent plasma display panel.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: September 9, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sok-San Kim, Tae-Kyoung Kang
  • Patent number: 7375702
    Abstract: A method for driving a PDP is disclosed, and is capable of suppressing an erroneous discharge during an address discharge and sustain discharge and of preventing deterioration in image quality, comprising: a reset period for initialization; an address period having a first half of the address period in which one of odd-numbered and even-numbered second electrodes are first scanned sequentially, and address pulses are applied to third electrodes, and a subsequent second half of the address period in which others of the odd-numbered and the even-numbered second electrodes are scanned sequentially, and address pulses are applied to the third electrodes; and a sustain discharge period in which sustain discharges are caused to occur, wherein the potential difference between the second electrode and the third electrode in the second half of the address period is set to a value larger than the potential difference between the second electrode and the third electrode in the first half of the address electrode.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: May 20, 2008
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Atsushi Yokoyama, Yoshikazu Kanazawa, Satoru Nishimura
  • Publication number: 20080088530
    Abstract: A display device includes a display panel for displaying images, a chassis base, at least one circuit board fixed to a planar surface of the chassis base and at least one connection cable electrically connecting the at least one circuit board to the display panel. At least one connection cable having at least one discharge element is mounted within the at least one connection cable. A cover plate is fixed to the chassis base and supporting the at least one discharge element. The cover plate has a heat resistant medium located between the cover plate and the discharge element and may include at least one discharge element alignment mark indicating a discharge element supporting area on the cover plate. The discharge element alignment mark is located on a surface of the cover plate facing the at least one discharge element.
    Type: Application
    Filed: July 19, 2007
    Publication date: April 17, 2008
    Inventor: Hyun Chang Kang
  • Patent number: 7358967
    Abstract: A method for driving a plasma display panel, including a reset period, an address period, and a sustain discharge period, wherein the reset period has a rising ramp section. During the rising ramp section of the reset period, a flat period of maintaining a peak voltage of a rising ramp applied to a scan electrode is maintained for longer than a period until a variation in a state of wall charges of the scan electrode is ended in all discharge cells.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: April 15, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Tae-Seong Kim, Woo-Joon Chung, Jin-Sung Kim, Kyoung-Ho Kang, Seung-Hun Chae
  • Patent number: 7355564
    Abstract: A plasma display panel (PDP) and driving method that includes a floating reset process. A number of subfields are generated from input video signals, and subfield data for each subfield are output. A first voltage is applied to the first electrode according to sustain information to cause a discharge in a first discharge space, and the first electrode is floated during a period which corresponds to subfield data of a previous subfield. During this process, the floating time is controlled according to the number of addressed cells called for in previous subfield data.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: April 8, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Kyoung-Ho Kang, Woo-Joon Chung, Jin-Sung Kim, Seung-Hun Chae
  • Patent number: 7317431
    Abstract: A method of grayscale-driving a display panel in accordance with pixel data derived from a video signal. The display panel includes a plurality of display lines, with a plurality of pixel cells serving as pixels being arranged on each display line. A display period of a single field of the video signal is divided into a plurality of subfields. The method includes dividing one subfield into M lower subfields. M is an integer greater than one. M groups of display lines are prepared by sequentially taking every M display lines from the display lines. First to Mth address steps are performed in the M lower subfields respectively and sequentially. Each address step sets the pixel cells belonging to the display lines of the display line group concerned, to a drive mode determined by the pixel data. A first light emission step is performed to cause the pixel cells whose drive mode is a lit mode, to emit light directly before or after the address step concerned. Another subfield is divided into N lower subfields.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: January 8, 2008
    Assignee: Pioneer Corporation
    Inventors: Masahiro Suzuki, Jun Kamiyamaguchi, Tetsuya Shigeta, Hirofumi Honda, Tetsuro Nagakubo
  • Patent number: 7312574
    Abstract: For reducing EMI and simplifying driving circuits, a plasma display panel includes a first substrate and a second substrate disposed facing each other, a plurality of barrier ribs disposed between the first and second substrates and forming a plurality of discharge cells, a phosphor layer formed in each of the discharge cells, a plurality of address electrodes formed on the second substrate, and a plurality of display electrodes formed on the first substrate in a direction crossing the plurality of address electrodes. Terminals of the plurality of display electrodes are located at a same side of the plasma display panel between the first substrate and the second substrate.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: December 25, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Joon-Yeon Kim, Jeong-Nam Kim, Gab-Sick Kim, Sung-Chun Cho
  • Publication number: 20070273612
    Abstract: In a plasma display, an output terminal of a scan integrated circuit is coupled to a plurality of scan electrodes, a first input terminal of the scan integrated circuit is coupled to a voltage source supplying a VscH voltage, and a second input terminal thereof is coupled to a source of a transistor. A gate of a transistor is coupled to an output terminal of a gate driver, a first node of the gate driver is coupled to a first voltage source supplying a first voltage, and a second node thereof is coupled to the source of the transistor. A first terminal of a capacitor is coupled to the first node of the gate driver, and a second terminal thereof is coupled to the second input terminal of the scan integrated circuit.
    Type: Application
    Filed: February 15, 2007
    Publication date: November 29, 2007
    Applicant: Samsung SDI Co., Ltd.
    Inventor: Jin-Ho YANG
  • Patent number: 7277067
    Abstract: A plasma display panel with an improved sustain electrode structure and capable of enhancing optical efficiency includes: a rear substrate; address electrodes arranged in a predetermined pattern on the rear substrate; a lower dielectric layer arranged to cover the address electrodes; barrier ribs arranged on the lower dielectric layer; phosphors arranged to be applied to internal sections of discharge cells defined by the barrier ribs; a front substrate arranged opposite the rear substrate; sustain electrodes including bus electrodes arranged in a predetermined pattern and transparent electrodes having relatively wider widths than that of the bus electrodes and arranged to extend toward the internal sections of the discharge cells from the bus electrodes, the transparent electrodes including lead-in parts each having a width equal to 0.5 to 1.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: October 2, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Ji-Sung Ko
  • Patent number: 7271800
    Abstract: A scan electrode drive of an apparatus for driving a plasma display panel includes a switching output circuit, a reset/sustain circuit, an upper scan circuit, a lower scan circuit, a first switching circuit, and a second switching circuit. The switching output circuit includes upper transistors, lower transistors each paired with corresponding upper transistor, and common output lines of the respective upper and lower transistor pairs, and the common output lines are connected to the scan electrode lines, respectively. The reset/sustain circuit outputs the driving signals during the reset period and the display-sustain period. The first switching circuit connects or disconnects the upper common power line of all of the upper transistors of the switching output circuit to or from an output terminal of the reset/sustain circuit.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: September 18, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hak-Ki Choi, Kyoung-Ho Kang, Seung-Hun Chae, Min-Sun Yoo, Woo-Joon Jeong